@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root, [data-theme="night"] {
    --bg-dark: #161226;
    --bg-card: #221a3d;
    --bg-card-light: #2c224e;
    --primary: #cbbaff;
    --primary-glow: rgba(203, 186, 255, 0.25);
    --secondary: #ff9b85;
    --secondary-glow: rgba(255, 155, 133, 0.35);
    --text-main: #fcfbfe;
    --text-muted: #a49ebd;
    --success: #5bf3c3;
    --border-color: rgba(255, 255, 255, 0.08);
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Abacus Styling */
    --abacus-frame: #1b1633;
    --abacus-beam: #2c254e;
    --abacus-rod: #5e5781;
}

[data-theme="light"], [data-theme="day"] {
    --bg-dark: #f0f2f8;
    --bg-card: #ffffff;
    --bg-card-light: #f7f8fc;
    --primary: #5c3ed6;
    --primary-glow: rgba(92, 62, 214, 0.2);
    --secondary: #e65100;
    --secondary-glow: rgba(230, 81, 0, 0.25);
    --text-main: #17122b;
    --text-muted: #645e7e;
    --success: #0b9e69;
    --border-color: rgba(92, 62, 214, 0.14);

    /* Abacus Styling */
    --abacus-frame: #e3dff5;
    --abacus-beam: #c5bee6;
    --abacus-rod: #958db8;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.5;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* App Container - Responsive Desktop Layout */
.app-container {
    width: 100%;
    max-width: 900px;
    /* Wide desktop container */
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    padding: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    background-color: var(--bg-dark);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

/* Header & Top Navigation */
header {
    padding: 12px 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
    gap: 16px;
    flex-wrap: wrap;
}

.brand-header-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-mascot-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(203, 186, 255, 0.25) 0%, rgba(255, 155, 133, 0.2) 100%);
    border: 2px solid var(--primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    box-shadow: 0 4px 15px rgba(203, 186, 255, 0.2);
    animation: mascotFloat 3s ease-in-out infinite;
}

@keyframes mascotFloat {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-4px) rotate(3deg); }
}

.header-title-container {
    display: flex;
    flex-direction: column;
}

.header-title {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-title .title-highlight {
    background: linear-gradient(90deg, #cbbaff 0%, #ff9b85 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-subtitle {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Account Widget Button */
.btn-account {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, rgba(203, 186, 255, 0.12) 0%, rgba(255, 155, 133, 0.12) 100%);
    border: 1px solid rgba(203, 186, 255, 0.3);
    color: var(--text-main);
    padding: 8px 16px;
    border-radius: 14px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
    transition: all 0.25s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.btn-account:hover {
    background: linear-gradient(135deg, rgba(203, 186, 255, 0.25) 0%, rgba(255, 155, 133, 0.25) 100%);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-account .account-avatar {
    font-size: 16px;
}

/* ==========================================================================
   TIER 1: MAIN SUBJECT NAVIGATION (Abacus | Arithmetic | Algebra)
   ========================================================================== */
.tier1-nav-container {
    margin-bottom: 16px;
}

.tier1-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 6px;
    border-radius: 18px;
}

.tier1-tab {
    background: transparent;
    border: 1px solid transparent;
    border-radius: 14px;
    padding: 12px 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    text-decoration: none;
}

.tier1-tab:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
}

.tier1-tab.active {
    background: linear-gradient(135deg, var(--bg-card-light) 0%, #34285e 100%);
    border-color: var(--primary);
    color: var(--text-main);
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35), 0 0 12px var(--primary-glow);
}

.tier1-tab .tab-icon {
    font-size: 20px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.tier1-tab .tab-text {
    font-weight: 700;
    letter-spacing: 0.2px;
}

.tier1-tab .tab-badge {
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 3px 8px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(255, 155, 133, 0.2) 0%, rgba(255, 95, 95, 0.3) 100%);
    border: 1px solid rgba(255, 155, 133, 0.4);
    color: var(--secondary);
    white-space: nowrap;
}

/* ==========================================================================
   TIER 2: SUB-NAVIGATION UNDER ABACUS (Dashboard | Practice Arena | Champ | Results)
   ========================================================================== */
.tier2-nav-container {
    margin-bottom: 24px;
}

.tier2-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 5px;
    border-radius: 14px;
    gap: 6px;
    overflow-x: auto;
}

.tier2-nav .nav-link {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 10px 14px;
    font-size: 13px;
    font-weight: 700;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    white-space: nowrap;
}

.tier2-nav .nav-link .nav-icon {
    font-size: 15px;
}

.tier2-nav .nav-link:hover:not(.active) {
    color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.05);
}

.tier2-nav .nav-link.active {
    background: var(--primary);
    color: #161226;
    box-shadow: 0 4px 12px var(--primary-glow);
}

/* ==========================================================================
   MOBILE COLLAPSIBLE NAVIGATION
   ========================================================================== */
.mobile-nav-bar {
    display: none;
}

@media (max-width: 768px) {
    header {
        padding: 6px 8px 8px;
        margin-bottom: 8px;
        gap: 6px;
        flex-wrap: nowrap;
        justify-content: space-between;
    }

    .brand-header-left {
        gap: 8px;
        min-width: 0;
        flex-shrink: 1;
    }

    .brand-mascot-avatar {
        width: 32px;
        height: 32px;
        min-width: 32px;
        font-size: 18px;
        border-radius: 10px;
        flex-shrink: 0;
        box-shadow: 0 2px 8px rgba(203, 186, 255, 0.15);
    }

    .header-title-container {
        min-width: 0;
    }

    .header-title {
        font-size: 17px;
        gap: 4px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        line-height: 1.2;
    }

    .header-subtitle {
        display: none; /* Save vertical space on mobile */
    }

    .header-right {
        gap: 6px;
        flex-shrink: 0;
    }

    .btn-theme-toggle {
        padding: 4px 8px;
        font-size: 11px;
        height: 30px;
        border-radius: 8px;
        gap: 4px;
    }

    .btn-account {
        padding: 4px 8px;
        font-size: 11px;
        height: 30px;
        border-radius: 8px;
        max-width: 130px;
        gap: 4px;
    }

    .btn-account .account-label {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .save-btn {
        width: 30px;
        height: 30px;
        padding: 4px;
        border-radius: 8px;
    }

    .mobile-nav-bar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid var(--border-color);
        border-radius: 10px;
        padding: 5px 10px;
        margin-bottom: 8px;
        gap: 6px;
    }

    .mobile-nav-crumb {
        display: flex;
        align-items: center;
        gap: 6px;
        font-size: 12px;
        font-weight: 800;
        color: var(--text-main);
        cursor: pointer;
        user-select: none;
    }

    .mobile-nav-crumb .crumb-icon {
        font-size: 15px;
    }

    .mobile-nav-crumb .crumb-arrow {
        color: var(--primary);
        font-size: 12px;
        margin-left: 2px;
        transition: transform 0.2s ease;
    }

    .mobile-nav-crumb.active-open .crumb-arrow {
        transform: rotate(180deg);
    }

    .btn-mobile-nav-toggle {
        background: rgba(203, 186, 255, 0.12);
        border: 1px solid rgba(203, 186, 255, 0.35);
        color: var(--primary);
        padding: 3px 8px;
        border-radius: 8px;
        font-size: 11px;
        font-weight: 800;
        display: inline-flex;
        align-items: center;
        gap: 4px;
        cursor: pointer;
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .btn-mobile-nav-toggle:active,
    .btn-mobile-nav-toggle:hover {
        background: rgba(203, 186, 255, 0.25);
        transform: translateY(-1px);
    }

    .main-nav-wrapper {
        display: none;
    }

    .main-nav-wrapper.mobile-open {
        display: block;
        animation: navSlideDown 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        background: rgba(22, 18, 38, 0.98);
        border: 1px solid var(--border-color);
        border-radius: 18px;
        padding: 12px;
        margin-bottom: 18px;
        box-shadow: 0 14px 35px rgba(0, 0, 0, 0.65);
        backdrop-filter: blur(10px);
    }

    .tier1-nav {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .tier2-nav {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }

    .tier1-nav-container {
        margin-bottom: 10px;
    }

    .tier2-nav-container {
        margin-bottom: 0;
    }
}

@keyframes navSlideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Main Content Grid */
main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.view {
    display: none;
    animation: fadeIn 0.25s ease-out forwards;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Dashboard & Setup Split Screen for Desktop */
.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 768px) {
    .split-layout {
        grid-template-columns: 1fr;
    }

    .app-container {
        padding: 16px;
    }
}

/* Cards */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.card-buddy {
    background: linear-gradient(135deg, rgba(82, 60, 163, 0.2) 0%, rgba(32, 26, 60, 0.2) 100%);
    border: 1px solid rgba(203, 186, 255, 0.15);
    display: flex;
    gap: 16px;
    align-items: center;
}

.buddy-icon {
    font-size: 32px;
}

.buddy-text {
    font-size: 14px;
    color: var(--text-muted);
}

.buddy-title {
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 2px;
}

/* Mode Buttons */
.mode-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.mode-btn {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 18px 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-muted);
}

.mode-btn.active {
    background-color: var(--primary);
    color: #161226;
    font-weight: 700;
    box-shadow: 0 4px 15px var(--primary-glow);
    border-color: transparent;
}

.mode-icon {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
}

.mode-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mode-btn.active .mode-label {
    color: #161226;
}

/* Mul/Div Sub-Operation Tabs */
.muldiv-sub-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 20px;
}

.muldiv-sub-tab {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    font-weight: 700;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.muldiv-sub-tab .sub-tab-icon {
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 4px;
}

.muldiv-sub-tab .sub-tab-label {
    font-size: 14px;
    font-weight: 700;
}

.muldiv-sub-tab[data-sub="mul"].active {
    background: linear-gradient(135deg, #ff7a59 0%, #ff5252 100%);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 6px 20px rgba(255, 107, 74, 0.4);
}

.muldiv-sub-tab[data-sub="div"].active {
    background: linear-gradient(135deg, #00b0ff 0%, #0081cb 100%);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 6px 20px rgba(0, 176, 255, 0.4);
}

/* Preview Example Card */
.card-preview-example {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 22px;
    text-align: center;
    margin-bottom: 20px;
}

.preview-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 12px;
    text-align: left;
}

.preview-equation-text {
    font-size: 26px;
    font-weight: 800;
    color: #b5a2ff;
    letter-spacing: 0.5px;
}

.preview-sub-sample {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 6px;
    font-weight: 600;
}

/* Styled Number Input for Max */
.styled-num-input {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 16px;
    font-weight: 800;
    padding: 8px 14px;
    border-radius: 12px;
    min-width: 140px;
    width: 160px;
    max-width: 100%;
    text-align: center;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-variant-numeric: tabular-nums;
}

.styled-num-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
}

.settings-divider {
    width: 100%;
    height: 1px;
    background-color: rgba(255, 255, 255, 0.06);
    margin: 16px 0;
}

/* Radio Options Row */
.radio-options-row {
    display: flex;
    gap: 24px;
    align-items: center;
}

.custom-radio-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    user-select: none;
}

.custom-radio-label input[type="radio"] {
    display: none;
}

.radio-custom-circle {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    position: relative;
}

.custom-radio-label input[type="radio"]:checked+.radio-custom-circle {
    border-color: #b5a2ff;
}

.custom-radio-label input[type="radio"]:checked+.radio-custom-circle::after {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #b5a2ff;
}

/* Row settings */
.settings-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.settings-row:last-child {
    border-bottom: none;
}

.setting-info {
    display: flex;
    flex-direction: column;
}

.setting-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
}

.setting-sublabel {
    font-size: 13px;
    color: var(--text-muted);
}

/* Selectors (multi-select / pills) */
.selector-group {
    display: flex;
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 4px;
    gap: 4px;
}

.selector-group.selector-group-wrap {
    flex-wrap: wrap;
    max-width: 100%;
}

.selector-pill {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    background: none;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.selector-pill.active {
    background-color: var(--primary);
    color: #161226;
    box-shadow: 0 2px 8px var(--primary-glow);
}

.selector-pill.pill-add-digit {
    background: rgba(203, 186, 255, 0.1);
    border: 1px dashed rgba(203, 186, 255, 0.4);
    color: var(--primary);
    font-weight: 800;
    font-size: 16px;
    padding: 6px 14px;
    line-height: 1;
}

.selector-pill.pill-add-digit:hover {
    background: var(--primary);
    color: #161226;
    border-style: solid;
    transform: scale(1.08);
    box-shadow: 0 4px 12px var(--primary-glow);
}

/* Custom Increments (- / +) */
.increment-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.inc-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 22px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.inc-btn:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.inc-btn:active {
    transform: scale(0.9);
}

.inc-value {
    font-size: 18px;
    font-weight: 700;
    width: 24px;
    text-align: center;
}

/* Switch (Toggles) */
.switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 30px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: .25s;
    border-radius: 34px;
    border: 1px solid var(--border-color);
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .25s;
    border-radius: 50%;
}

input:checked+.slider {
    background-color: var(--primary);
}

input:checked+.slider:before {
    transform: translateX(22px);
    background-color: #161226;
}

/* Dropdowns / Inputs */
.custom-select {
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 8px 32px 8px 14px;
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    appearance: none;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s;
    text-align: right;
}

.dropdown-container {
    position: relative;
}

.dropdown-container:after {
    content: "▼";
    font-size: 9px;
    color: var(--text-muted);
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.input-number-seconds {
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 8px 12px;
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    width: 80px;
    text-align: center;
    outline: none;
}

/* Info Icon */
.info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    background-color: var(--text-muted);
    color: var(--bg-dark);
    font-size: 10px;
    font-weight: 800;
    border-radius: 50%;
    margin-left: 6px;
}

/* Let's Practice Button */
.btn-primary {
    background-color: var(--secondary);
    color: #161226;
    border: none;
    border-radius: 20px;
    padding: 18px;
    font-size: 18px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    width: 100%;
    cursor: pointer;
    box-shadow: 0 6px 20px var(--secondary-glow);
    transition: all 0.2s;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 155, 133, 0.55);
}

/* Auditory settings */
.checkbox-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.checkbox-custom {
    position: relative;
    width: 24px;
    height: 24px;
    cursor: pointer;
}

.checkbox-custom input {
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-box {
    position: absolute;
    top: 0;
    left: 0;
    width: 24px;
    height: 24px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: 6px;
}

.checkbox-custom input:checked+.checkbox-box {
    background-color: var(--primary);
    border-color: var(--primary);
}

.checkbox-box:after {
    content: "";
    position: absolute;
    display: none;
    left: 7px;
    top: 3px;
    width: 6px;
    height: 11px;
    border: solid #161226;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-custom input:checked+.checkbox-box:after {
    display: block;
}


/* ==========================================================================
   2ND SCREEN (PLAYING PRACTICE VIEW) STYLING - Split Layout for Desktop
   ========================================================================== */
.play-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: stretch;
    width: 100%;
    box-sizing: border-box;
}

.play-layout > div {
    width: 100%;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .play-layout {
        display: flex !important;
        flex-direction: column !important;
        grid-template-columns: 1fr !important;
        gap: 16px !important;
        align-items: stretch !important;
    }
}

/* Header Elements for 2nd Screen (Practice Play) */
.play-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin-bottom: 12px;
    font-size: 16px;
    font-weight: 700;
    gap: 8px;
    flex-wrap: wrap;
}

.play-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.play-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.play-timer-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-family: monospace;
    font-size: 14px;
    font-weight: 800;
    color: var(--primary);
    height: 32px;
    box-sizing: border-box;
}

.btn-play-action {
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 700;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    border: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.25);
    height: 32px;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.15s ease;
    box-sizing: border-box;
}

.btn-play-action:hover {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--primary);
}

.btn-play-settings-toggle {
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 700;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.25);
    height: 32px;
    color: var(--primary);
    cursor: pointer;
    transition: all 0.2s ease;
    box-sizing: border-box;
}

.btn-play-settings-toggle:hover {
    background: rgba(255, 255, 255, 0.08);
}

.btn-play-settings-toggle.active {
    background: rgba(203, 186, 255, 0.2);
    border-color: var(--primary);
}

/* Collapsible Settings Drawer - Minimized by default */
.play-settings-drawer {
    display: none;
    background: rgba(15, 12, 26, 0.95);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 10px 14px;
    margin-bottom: 14px;
    animation: slideDownFade 0.2s ease-out;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.play-settings-drawer.open {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
}

@keyframes slideDownFade {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Text Size Adjuster: - A + */
.text-size-control {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2px 10px;
    box-sizing: border-box;
}

.size-btn {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    padding: 2px 6px;
    line-height: 1;
}

.size-label {
    font-size: 14px;
    color: var(--text-main);
    font-weight: 700;
}

.play-timer {
    color: var(--text-muted);
}

/* Vertical Stack Display Box */
.vertical-display-box {
    width: 100%;
    min-height: 380px;
    height: 100%;
    max-height: calc(100vh - 170px);
    background-color: #0f0c1a;
    border: 2.5px solid #2d2353;
    border-radius: 24px;
    padding: 20px 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow-y: auto;
    gap: 8px;
    position: relative;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.5);
    box-sizing: border-box;
}

/* For dense questions with 7-11 rows */
.vertical-display-box.dense-rows {
    gap: 4px;
    padding: 14px 28px;
}

/* For ultra-dense questions with 12-15+ rows */
.vertical-display-box.ultra-dense-rows {
    gap: 2px;
    padding: 10px 24px;
}

/* Individual Stacked Number styling */
.stacked-number {
    font-size: 42px;
    /* Adjustable dynamically */
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: 0.5px;
    line-height: 1.15;
    font-variant-numeric: tabular-nums;
    transition: font-size 0.15s ease;
}

.stacked-number.negative {
    color: var(--secondary);
}

.stacked-number.answer-state {
    font-size: 32px;
    color: var(--primary);
    align-self: center;
    margin-top: auto;
    margin-bottom: auto;
}

/* Championship & Stacked Questions Styling */
#championship-play .vertical-display-box {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 260px;
    height: auto;
    padding: 24px 20px;
    margin: 16px 0;
    overflow-y: auto;
    box-sizing: border-box;
}

#champ-numbers-stack {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.champ-stack-inner,
.display-stack-inner {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-end;
    width: fit-content;
    margin: 0 auto;
    gap: 6px;
}

.stacked-number-row {
    display: flex;
    flex-direction: row;
    align-items: baseline;
    justify-content: flex-end;
    font-size: 42px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.15;
    letter-spacing: 0.5px;
    font-variant-numeric: tabular-nums;
    transition: font-size 0.15s ease;
    user-select: none;
    -webkit-user-select: none;
}

.stacked-number-row.negative {
    color: var(--secondary);
}

.stacked-number-row .stacked-sign {
    display: inline-block;
    width: 28px;
    min-width: 28px;
    text-align: center;
    margin-right: 8px;
    font-size: 0.85em;
    font-weight: 800;
    flex-shrink: 0;
    user-select: none;
    -webkit-user-select: none;
}

.stacked-number-row .stacked-val {
    display: inline-block;
    text-align: right;
    font-variant-numeric: tabular-nums;
    letter-spacing: 1px;
}

/* Side navigation handles in mockup */
.display-side-indicator {
    position: absolute;
    width: 20px;
    height: 2px;
    background-color: rgba(255, 255, 255, 0.1);
    top: 50%;
}

.display-side-indicator.left {
    left: 16px;
}

.display-side-indicator.right {
    right: 16px;
}

/* ==========================================================================
   ABACUS LEVEL SELECTOR & PRESETS
   ========================================================================== */
.level-pills-row {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 4px 2px 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.level-pills-row::-webkit-scrollbar {
    display: none;
}

.level-pill {
    flex: 1;
    min-width: 58px;
    padding: 8px 10px;
    border-radius: 12px;
    border: 1.5px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 800;
    cursor: pointer;
    text-align: center;
    transition: all 0.15s ease;
    white-space: nowrap;
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.level-pill:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-main);
    border-color: rgba(203, 186, 255, 0.4);
}

.level-pill.active {
    background: linear-gradient(135deg, var(--primary), #8b5cf6) !important;
    color: #ffffff !important;
    border-color: #a78bfa !important;
    box-shadow: 0 4px 14px rgba(139, 92, 246, 0.45);
    transform: scale(1.04);
}

.level-pill[data-level="10"].active {
    background: linear-gradient(135deg, #f59e0b, #eab308) !important;
    border-color: #fde047 !important;
    box-shadow: 0 4px 14px rgba(234, 179, 8, 0.45);
}

[data-theme="light"] .level-pill,
[data-theme="day"] .level-pill {
    background: #f1f0f7;
    color: #4b446b;
    border-color: #dcd7ea;
}

[data-theme="light"] .level-pill:hover,
[data-theme="day"] .level-pill:hover {
    background: #e6e2f3;
    color: #1b162f;
}

[data-theme="light"] .card-level-presets,
[data-theme="day"] .card-level-presets {
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%) !important;
    border-color: #c4b5fd !important;
}

.level-preset-pill {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 10px;
    border: 1.5px solid var(--border-color);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    -webkit-user-select: none;
}

.level-preset-pill:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-main);
    border-color: rgba(203, 186, 255, 0.55);
    transform: translateY(-1px);
}

.level-preset-pill.active {
    background: rgba(203, 186, 255, 0.2) !important;
    color: var(--text-main) !important;
    border-color: var(--primary) !important;
    font-weight: 800;
    box-shadow: 0 2px 10px rgba(203, 186, 255, 0.35);
}

.level-preset-pill .preset-pill-tag {
    font-size: 11px;
    font-weight: 900;
    padding: 2px 7px;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.4);
    color: var(--primary);
    border: 1px solid rgba(203, 186, 255, 0.25);
    letter-spacing: 0.3px;
}

.level-preset-pill.active .preset-pill-tag {
    background: var(--primary);
    color: #161226;
    border-color: var(--primary);
}

.level-preset-pill .preset-pill-summary {
    font-size: 11.5px;
    color: var(--text-main);
    white-space: nowrap;
}

[data-theme="light"] .level-preset-pill,
[data-theme="day"] .level-preset-pill {
    background: #f3f0fa;
    color: #4b446b;
    border-color: #dcd7ea;
}

[data-theme="light"] .level-preset-pill:hover,
[data-theme="day"] .level-preset-pill:hover {
    background: #e9e4f5;
    color: #1b162f;
    border-color: #8b5cf6;
}

[data-theme="light"] .level-preset-pill.active,
[data-theme="day"] .level-preset-pill.active {
    background: #ede9fe !important;
    color: #5b21b6 !important;
    border-color: #8b5cf6 !important;
}

[data-theme="light"] .level-preset-pill .preset-pill-tag,
[data-theme="day"] .level-preset-pill .preset-pill-tag {
    background: #e2daf8;
    color: #5b21b6;
    border-color: #c4b5fd;
}

[data-theme="light"] .level-preset-pill.active .preset-pill-tag,
[data-theme="day"] .level-preset-pill.active .preset-pill-tag {
    background: #7c3aed;
    color: #ffffff;
}

/* Tooltip Popup on Sub-Setting Pills */
.level-preset-pill[data-tooltip] {
    position: relative;
}

.level-preset-pill[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: rgba(18, 14, 33, 0.95);
    color: #ffffff;
    padding: 6px 11px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.2px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1), transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(203, 186, 255, 0.35);
    z-index: 1000;
}

.level-preset-pill[data-tooltip]::after {
    content: '';
    position: absolute;
    bottom: calc(100% + 3px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    border-width: 5px 5px 0 5px;
    border-style: solid;
    border-color: rgba(18, 14, 33, 0.95) transparent transparent transparent;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1), transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
}

.level-preset-pill[data-tooltip]:hover::before,
.level-preset-pill[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

[data-theme="light"] .level-preset-pill[data-tooltip]::before,
[data-theme="day"] .level-preset-pill[data-tooltip]::before {
    background: #1e1b4b;
    color: #f8fafc;
    border-color: #818cf8;
}

[data-theme="light"] .level-preset-pill[data-tooltip]::after,
[data-theme="day"] .level-preset-pill[data-tooltip]::after {
    border-color: #1e1b4b transparent transparent transparent;
}

/* ==========================================================================
   KIDS FRIENDLY NUMERIC KEYPAD
   ========================================================================== */
.kids-keypad-card {
    background-color: #1b162f;
    border: 2px solid rgba(255, 255, 255, 0.06);
    border-radius: 24px;
    padding: 16px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Keypad Top Row (Clear Icon - Enlarged AnswerBox - Submit) */
.keypad-top-row {
    display: grid;
    grid-template-columns: 58px 1fr 96px;
    gap: 10px;
    align-items: center;
}

.btn-keypad-clear {
    background-color: #312b48;
    color: var(--text-muted);
    border: none;
    border-radius: 14px;
    padding: 10px 4px;
    font-size: 20px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 58px;
}

.btn-keypad-clear:hover {
    background-color: #433c63;
    color: #ff9b85;
    transform: scale(1.04);
}

.keypad-answer-box {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.45) 0%, rgba(22, 18, 38, 0.6) 100%);
    border: 2px solid rgba(203, 186, 255, 0.25);
    border-radius: 14px;
    padding: 8px 14px;
    font-size: 26px;
    font-weight: 800;
    color: var(--text-main);
    text-align: center;
    min-height: 58px;
    height: 58px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-variant-numeric: tabular-nums;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4), 0 0 12px rgba(203, 186, 255, 0.05);
    letter-spacing: 0.5px;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) transparent;
    transition: font-size 0.15s ease;
}

.keypad-answer-box::-webkit-scrollbar {
    height: 3px;
}

.keypad-answer-box::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

.keypad-answer-box.has-value {
    color: #5bf3c3;
    border-color: rgba(91, 243, 195, 0.6);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4), 0 0 16px rgba(91, 243, 195, 0.25);
}

.btn-keypad-submit {
    background-color: #ffb1bf;
    /* Light Pink/Peach */
    color: #161226;
    border: none;
    border-radius: 14px;
    padding: 10px 8px;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    transition: transform 0.1s, background-color 0.2s;
    text-align: center;
    height: 58px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-keypad-submit:hover {
    background-color: #ffc4cf;
}

.btn-keypad-submit:active {
    transform: scale(0.97);
}

/* Numeric Keys Grid (3x4) */
.keypad-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.key-btn {
    background-color: #f7f7f9;
    color: #161226;
    border: none;
    border-radius: 13px;
    height: 48px;
    padding: 0;
    font-size: 22px;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: none !important;
    user-select: none !important;
    -webkit-user-select: none !important;
    -webkit-tap-highlight-color: transparent !important;
}

.kids-keypad-card, .keypad-grid {
    touch-action: none !important;
    user-select: none !important;
}

.key-btn:hover {
    background-color: #ffffff;
}

.key-btn:active {
    background-color: #d8d8de !important;
}

.key-btn.backspace-key {
    background-color: #ffffff;
    font-size: 18px;
}

/* Keypad Bottom Row (End) */
.keypad-bottom-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 4px;
}

.btn-keypad-end {
    background: linear-gradient(135deg, #e39d9d 0%, #db8686 100%);
    color: #161226;
    border: none;
    border-radius: 16px;
    padding: 16px;
    font-size: 18px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.15s;
    text-align: center;
    width: 100%;
}

.btn-keypad-end:hover {
    filter: brightness(1.05);
}

/* ==========================================================================
   VIRTUAL ABACUS (Practice page optional element)
   ========================================================================== */
.virtual-abacus-container {
    width: 100%;
    margin-top: 16px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 20px;
}

.abacus-title {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.abacus-value-hud {
    color: var(--primary);
    font-weight: 800;
}

.abacus-board {
    width: 100%;
    background-color: var(--abacus-frame);
    border: 8px solid #2b2447;
    border-radius: 14px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
    padding: 8px 4px;
    position: relative;
    touch-action: none;
}

.abacus-rods {
    display: grid;
    grid-auto-columns: minmax(0, 1fr);
    grid-auto-flow: column;
    height: 160px;
    position: relative;
}

.abacus-rod-col {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

.abacus-rod-wire {
    position: absolute;
    width: 3px;
    height: 100%;
    background: linear-gradient(90deg, #443c68 0%, #7d75a8 50%, #443c68 100%);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.abacus-beam-divider {
    position: absolute;
    top: 42px;
    left: -4px;
    right: -4px;
    height: 8px;
    background: linear-gradient(180deg, #373059 0%, #1e1936 100%);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(0, 0, 0, 0.5);
    z-index: 5;
}

.abacus-dot {
    position: absolute;
    width: 4px;
    height: 4px;
    background-color: var(--text-main);
    border-radius: 50%;
    top: 2px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 6;
}

.abacus-bead {
    width: 82%;
    max-width: 38px;
    height: 20px;
    background: radial-gradient(ellipse at center, #d8cbff 0%, #7d6abf 60%, #483b80 100%);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    z-index: 10;
    cursor: pointer;
    position: absolute;
    transition: transform 0.15s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.abacus-bead.active {
    background: radial-gradient(ellipse at center, #ffcfb7 0%, #ff855f 60%, #cc4923 100%);
}

.abacus-bead.upper {
    top: 2px;
}

.abacus-bead.lower-1 {
    top: 54px;
}

.abacus-bead.lower-2 {
    top: 76px;
}

.abacus-bead.lower-3 {
    top: 98px;
}

.abacus-bead.lower-4 {
    top: 120px;
}

.abacus-bead.upper.active {
    transform: translateY(18px);
}

.abacus-bead.lower-1.active {
    transform: translateY(-18px);
}

.abacus-bead.lower-2.active {
    transform: translateY(-18px);
}

.abacus-bead.lower-3.active {
    transform: translateY(-18px);
}

.abacus-bead.lower-4.active {
    transform: translateY(-18px);
}

.abacus-rod-label {
    position: absolute;
    bottom: -6px;
    font-size: 9px;
    font-weight: 700;
    color: var(--text-muted);
}

.abacus-reset-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-weight: 600;
    transition: color 0.2s;
    font-size: 12px;
}

.abacus-reset-btn:hover {
    color: var(--secondary);
}

/* ==========================================================================
   RESULTS VIEW STYLING
   ========================================================================== */
.results-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 0;
}

.score-circle {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, #7058cc 100%);
    box-shadow: 0 10px 25px var(--primary-glow);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 10px 0 24px;
}

.score-num {
    font-size: 40px;
    font-weight: 800;
    color: #161226;
    line-height: 1;
}

.score-lbl {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    color: #161226;
    opacity: 0.8;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

.stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    width: 100%;
    margin-bottom: 24px;
}

.stat-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    text-align: center;
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-main);
}

.stat-value.success {
    color: var(--success);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.review-list {
    width: 100%;
    margin-bottom: 24px;
}

.review-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.review-item {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 14px 20px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.review-equation {
    font-size: 16px;
    font-weight: 600;
}

.review-answers {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
}

.review-answer-user {
    font-weight: 700;
    color: var(--secondary);
}

.review-answer-user.correct {
    color: var(--success);
}

.review-answer-correct {
    font-weight: 600;
    color: var(--text-muted);
}

.btn-group {
    display: flex;
    gap: 16px;
    width: 100%;
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 16px;
    font-size: 16px;
    font-weight: 700;
    width: 100%;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   DASHBOARD VIEW STYLING
   ========================================================================== */
.dash-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.avatar {
    width: 54px;
    height: 54px;
    border-radius: 16px;
    background-color: var(--primary);
    color: #161226;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px var(--primary-glow);
}

.dash-welcome {
    font-size: 20px;
    font-weight: 700;
}

.dash-points {
    font-size: 14px;
    color: var(--text-muted);
}

.stats-grid-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.dash-stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px 10px;
    text-align: center;
}

.dash-stat-val {
    font-size: 20px;
    font-weight: 800;
}

.dash-stat-lbl {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 4px;
}

.history-card {
    padding: 20px;
}

.history-title {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.history-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    font-size: 14px;
}

.history-item:last-child {
    border-bottom: none;
}

.history-meta {
    display: flex;
    flex-direction: column;
}

.history-mode {
    font-weight: 600;
}

.history-date {
    color: var(--text-muted);
    font-size: 12px;
}

.history-score {
    font-weight: 700;
    color: var(--success);
    align-self: center;
}

.history-score.fail {
    color: var(--secondary);
}

/* ==========================================================================
   CHAMPIONSHIP & PLAY MODE - RESPONSIVE DESIGN FOR ALL DEVICES
   ========================================================================== */

/* Base Desktop / Tablet Landscape (> 1024px) */
.student-lobby-pill {
    background-color: var(--bg-card-light);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-main);
    transition: all 0.2s;
}

.student-lobby-pill.active {
    border-color: rgba(91, 243, 195, 0.4);
    background-color: rgba(91, 243, 195, 0.08);
}

.champ-play-hud {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 900px;
    margin: 0 auto 16px;
    background-color: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: 12px;
    box-sizing: border-box;
}

.champ-play-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: flex-start;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.champ-play-grid.is-host-mode,
.champ-play-grid.is-results-mode {
    grid-template-columns: 1fr;
    max-width: 750px;
}

.champ-main-left {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.champ-main-right {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

#championship-play .kids-keypad-card {
    position: static;
    width: 100%;
    max-width: 440px;
    margin: 0 auto;
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    border-radius: 24px;
    box-sizing: border-box;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    touch-action: manipulation;
}

#championship-play .keypad-top-row {
    display: grid;
    grid-template-columns: 56px 1fr 56px;
    gap: 10px;
    align-items: center;
    width: 100%;
    margin: 0 0 8px 0;
    box-sizing: border-box;
}

#championship-play .keypad-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    width: 100%;
    margin: 0;
    box-sizing: border-box;
}

.champ-table-responsive {
    width: 100%;
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.1);
}

.champ-leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
}

.champ-leaderboard-table th {
    background-color: rgba(0, 0, 0, 0.3);
    color: var(--text-muted);
    font-weight: 700;
    padding: 12px 16px;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border-color);
}

.champ-leaderboard-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

.champ-leaderboard-table tr:last-child td {
    border-bottom: none;
}

.champ-leaderboard-table tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Host Live Performance Monitor */
#champ-host-live-panel {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 10px 12px;
    box-sizing: border-box;
}

.champ-host-live-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
}

.champ-host-live-badge.correct {
    background: rgba(91, 243, 195, 0.15);
    color: var(--success);
    border: 1px solid rgba(91, 243, 195, 0.3);
}

.champ-host-live-badge.wrong {
    background: rgba(255, 95, 95, 0.15);
    color: #ff5f5f;
    border: 1px solid rgba(255, 95, 95, 0.3);
}

.champ-host-live-badge.pending {
    background: rgba(203, 186, 255, 0.12);
    color: var(--secondary);
    border: 1px solid rgba(203, 186, 255, 0.25);
}

/* ==========================================================================
   VIRTUAL KEYPAD BUTTONS (Desktop & Shared Base)
   ========================================================================== */
.ws-keypad-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #120e20;
    border-top: 1px solid var(--border-color);
    padding: 12px 16px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    z-index: 9999;
    box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: none;
    box-sizing: border-box;
    touch-action: manipulation !important;
    user-select: none !important;
    -webkit-user-select: none !important;
}

.ws-keypad-header-row {
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 440px;
    margin: 0 auto 8px;
    padding: 0 4px;
    box-sizing: border-box;
}

.ws-keypad-grid {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 8px;
    max-width: 440px;
    margin: 0 auto;
    box-sizing: border-box;
    touch-action: manipulation !important;
    user-select: none !important;
}

.ws-key-btn,
.champ-key-btn {
    height: 56px;
    font-size: 24px;
    font-weight: 800;
    border-radius: 16px;
    border: 1.5px solid rgba(255, 255, 255, 0.16);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.14) 0%, rgba(255, 255, 255, 0.06) 100%);
    color: #ffffff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
    outline: none;
    touch-action: none !important;
    user-select: none !important;
    -webkit-user-select: none !important;
    transition: transform 0.06s ease, background-color 0.08s ease, border-color 0.08s ease, box-shadow 0.08s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25), inset 0 1px 1px rgba(255, 255, 255, 0.2);
    box-sizing: border-box;
    width: 100%;
    margin: 0;
    padding: 0;
}

.ws-key-btn:active,
.champ-key-btn:active,
.ws-key-btn.key-pressed,
.champ-key-btn.key-pressed {
    background: rgba(91, 243, 195, 0.3) !important;
    color: #ffffff !important;
    border-color: #5bf3c3 !important;
    transform: scale(0.92) !important;
    box-shadow: 0 0 14px rgba(91, 243, 195, 0.5), inset 0 2px 4px rgba(0,0,0,0.3) !important;
}

.ws-key-btn.secondary-key,
.champ-key-btn.secondary-key {
    background: linear-gradient(180deg, rgba(203, 186, 255, 0.16) 0%, rgba(203, 186, 255, 0.07) 100%);
    color: var(--secondary, #cbbeff);
    font-size: 24px;
    border-color: rgba(203, 186, 255, 0.25);
}

.ws-key-btn.secondary-key:active,
.champ-key-btn.secondary-key:active,
.ws-key-btn.secondary-key.key-pressed,
.champ-key-btn.secondary-key.key-pressed {
    background: rgba(203, 186, 255, 0.4) !important;
    border-color: #cbbeff !important;
    color: #ffffff !important;
    transform: scale(0.92) !important;
}

.ws-key-btn.danger-key,
.champ-key-btn.danger-key {
    background: linear-gradient(180deg, rgba(255, 95, 95, 0.25) 0%, rgba(255, 95, 95, 0.12) 100%);
    color: #ff8080;
    border-color: rgba(255, 95, 95, 0.4);
    font-size: 20px;
}

.ws-key-btn.danger-key:active,
.champ-key-btn.danger-key:active,
.ws-key-btn.danger-key.key-pressed,
.champ-key-btn.danger-key.key-pressed {
    background-color: rgba(255, 95, 95, 0.5) !important;
    border-color: #ff5f5f !important;
    color: #ffffff !important;
    transform: scale(0.92) !important;
}

.ws-key-btn.success-key,
.champ-key-btn.success-key,
#champ-key-submit {
    background: linear-gradient(135deg, #059669, #10b981) !important;
    color: #ffffff !important;
    border-color: rgba(16, 185, 129, 0.6) !important;
    font-size: 16px;
    font-weight: 800;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35), inset 0 1px 1px rgba(255, 255, 255, 0.3) !important;
}

.ws-key-btn.success-key:active,
.champ-key-btn.success-key:active,
.ws-key-btn.success-key.key-pressed,
.champ-key-btn.success-key.key-pressed,
#champ-key-submit:active,
#champ-key-submit.key-pressed {
    background: linear-gradient(135deg, #047857, #059669) !important;
    border-color: #10b981 !important;
    transform: scale(0.92) !important;
    box-shadow: 0 0 16px rgba(16, 185, 129, 0.6) !important;
}

.btn-keypad-clear.key-pressed {
    transform: scale(0.90) !important;
    background-color: rgba(255, 107, 107, 0.4) !important;
    color: #ff9b85 !important;
    box-shadow: 0 0 12px rgba(255, 107, 107, 0.4) !important;
}

/* ==========================================================================
   BREAKPOINT 1A: IPAD & TABLETS PORTRAIT (681px - 1024px, PORTRAIT)
   ========================================================================== */
@media (min-width: 681px) and (max-width: 1024px) and (orientation: portrait) {
    .champ-play-grid,
    .play-layout {
        display: flex !important;
        flex-direction: column !important;
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 auto !important;
        gap: 16px !important;
        align-items: stretch !important;
    }

    .play-layout > div,
    .champ-main-left,
    .champ-main-right {
        width: 100% !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 12px !important;
        box-sizing: border-box !important;
    }

    #championship-play .vertical-display-box,
    .vertical-display-box {
        width: 100% !important;
        min-height: 240px !important;
        max-height: 38vh !important;
        height: auto !important;
        padding: 20px 28px !important;
        margin: 0 auto !important;
        border-radius: 22px !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
        box-sizing: border-box !important;
    }

    .stacked-number {
        font-size: 42px;
    }

    .stacked-number-row {
        font-size: 42px;
    }

    #championship-play .kids-keypad-card,
    .kids-keypad-card {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 auto !important;
        padding: 20px 24px !important;
        gap: 14px !important;
        border-radius: 24px !important;
        display: flex !important;
        flex-direction: column !important;
        box-sizing: border-box !important;
        flex: 1 !important;
    }

    .keypad-top-row {
        display: grid !important;
        grid-template-columns: 64px 1fr 110px !important;
        gap: 12px !important;
        margin: 0 0 6px 0 !important;
        width: 100% !important;
        height: 64px !important;
        box-sizing: border-box !important;
    }

    #championship-play .keypad-top-row {
        display: grid !important;
        grid-template-columns: 64px 1fr 64px !important;
        gap: 12px !important;
        margin: 0 0 6px 0 !important;
        width: 100% !important;
        height: 64px !important;
        box-sizing: border-box !important;
    }

    #championship-play .keypad-answer-box,
    .keypad-answer-box {
        min-height: 64px !important;
        height: 64px !important;
        font-size: 30px !important;
        border-radius: 16px !important;
        line-height: 64px !important;
        box-sizing: border-box !important;
    }

    #championship-play .btn-keypad-clear,
    .btn-keypad-clear {
        height: 64px !important;
        font-size: 24px !important;
        border-radius: 16px !important;
        padding: 0 !important;
    }

    .btn-keypad-submit {
        height: 64px !important;
        font-size: 18px !important;
        font-weight: 800 !important;
        border-radius: 16px !important;
        min-width: 110px !important;
        padding: 0 16px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        box-sizing: border-box !important;
    }

    #championship-play .keypad-grid,
    .keypad-grid {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 12px !important;
        width: 100% !important;
        margin: 0 !important;
        box-sizing: border-box !important;
    }

    #championship-play .champ-key-btn,
    .champ-key-btn,
    .ws-key-btn,
    .key-btn {
        height: 68px !important;
        font-size: 28px !important;
        font-weight: 800 !important;
        border-radius: 16px !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .key-btn.backspace-key {
        height: 62px !important;
        font-size: 18px !important;
    }

    #champ-key-submit {
        font-size: 18px !important;
        height: 64px !important;
        font-weight: 800 !important;
        border-radius: 16px !important;
    }

    .play-header-row {
        max-width: 100%;
        margin: 0 auto 10px;
    }
}

/* ==========================================================================
   BREAKPOINT 1B: IPAD & TABLETS LANDSCAPE (681px - 1024px, LANDSCAPE)
   ========================================================================== */
@media (min-width: 681px) and (max-width: 1024px) and (orientation: landscape) {
    .champ-play-grid,
    .play-layout {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: 18px !important;
        max-width: 100% !important;
        margin: 0 auto !important;
        align-items: stretch !important;
    }

    .play-layout > div,
    .champ-main-left,
    .champ-main-right {
        width: 100% !important;
        display: flex !important;
        flex-direction: column !important;
        box-sizing: border-box !important;
    }

    #championship-play .vertical-display-box,
    .vertical-display-box {
        width: 100% !important;
        min-height: 280px !important;
        max-height: calc(100vh - 130px) !important;
        height: 100% !important;
        padding: 16px 20px !important;
        border-radius: 20px !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
    }

    #championship-play .kids-keypad-card,
    .kids-keypad-card {
        padding: 16px 20px !important;
        gap: 12px !important;
        border-radius: 20px !important;
        max-width: 100% !important;
        margin: 0 auto !important;
        width: 100% !important;
        height: 100% !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: space-between !important;
        box-sizing: border-box !important;
    }

    .keypad-top-row {
        display: grid !important;
        grid-template-columns: 56px 1fr 96px !important;
        gap: 10px !important;
        margin: 0 0 6px 0 !important;
        height: 52px !important;
    }

    #championship-play .keypad-top-row {
        display: grid !important;
        grid-template-columns: 52px 1fr 52px !important;
        gap: 10px !important;
        margin: 0 0 6px 0 !important;
        height: 52px !important;
    }

    .btn-keypad-submit {
        height: 52px !important;
        font-size: 15px !important;
        font-weight: 800 !important;
        border-radius: 14px !important;
        min-width: 96px !important;
        padding: 0 12px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    #championship-play .keypad-answer-box,
    .keypad-answer-box {
        min-height: 52px !important;
        height: 52px !important;
        font-size: 26px !important;
        border-radius: 14px !important;
        line-height: 52px !important;
    }

    #championship-play .btn-keypad-clear,
    .btn-keypad-clear {
        height: 52px !important;
        font-size: 20px !important;
        border-radius: 14px !important;
        padding: 0 !important;
    }

    #championship-play .keypad-grid,
    .keypad-grid {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 10px !important;
        width: 100% !important;
        flex: 1 !important;
    }

    #championship-play .champ-key-btn,
    .champ-key-btn,
    .ws-key-btn,
    .key-btn {
        height: 54px !important;
        font-size: 22px !important;
        border-radius: 14px !important;
    }

    .key-btn.backspace-key {
        height: 48px !important;
        font-size: 16px !important;
    }

    #champ-key-submit {
        font-size: 15px !important;
        height: 52px !important;
        border-radius: 14px !important;
    }
}

/* ==========================================================================
   BREAKPOINT 2: MOBILE PHONES PORTRAIT (<= 680px)
   ========================================================================== */
@media (max-width: 680px) {
    .champ-play-grid,
    .play-layout {
        display: flex !important;
        flex-direction: column !important;
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 auto !important;
        gap: 8px !important;
        align-items: stretch !important;
        flex: 1 !important;
    }

    .play-layout > div,
    .champ-main-left,
    .champ-main-right {
        width: 100% !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 6px !important;
        box-sizing: border-box !important;
    }

    .champ-play-hud {
        padding: 6px 10px !important;
        margin-bottom: 6px !important;
        border-radius: 10px !important;
    }

    #champ-que-progress,
    #champ-timer-countdown {
        font-size: 13px !important;
    }

    #championship-play .vertical-display-box,
    .vertical-display-box {
        width: 100% !important;
        min-height: 200px !important;
        max-height: 54vh !important;
        height: auto !important;
        padding: 8px 12px !important;
        margin: 0 0 4px 0 !important;
        border-radius: 18px !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
        box-sizing: border-box !important;
        flex: 1 !important;
    }

    .champ-stack-inner,
    .display-stack-inner {
        gap: 2px !important;
    }

    .stacked-number-row {
        font-size: 26px;
        line-height: 1.15;
    }

    .stacked-number-row .stacked-sign {
        width: 18px;
        min-width: 18px;
        margin-right: 4px;
    }

    .vertical-display-box.dense-rows {
        gap: 1px;
        padding: 4px 8px;
    }

    .vertical-display-box.ultra-dense-rows {
        gap: 1px;
        padding: 2px 6px;
    }

    #championship-play .kids-keypad-card,
    .kids-keypad-card {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 auto !important;
        padding: 6px 8px !important;
        gap: 5px !important;
        border-radius: 14px !important;
        display: flex !important;
        flex-direction: column !important;
        box-sizing: border-box !important;
    }

    .keypad-top-row {
        display: grid !important;
        grid-template-columns: 40px 1fr 78px !important;
        gap: 6px !important;
        margin: 0 0 2px 0 !important;
        width: 100% !important;
        height: 38px !important;
        box-sizing: border-box !important;
    }

    #championship-play .keypad-top-row {
        display: grid !important;
        grid-template-columns: 40px 1fr 40px !important;
        gap: 6px !important;
        margin: 0 0 2px 0 !important;
        width: 100% !important;
        height: 38px !important;
        box-sizing: border-box !important;
    }

    #championship-play .btn-keypad-clear,
    .btn-keypad-clear {
        height: 38px !important;
        font-size: 16px !important;
        border-radius: 10px !important;
        padding: 0 !important;
    }

    #championship-play .keypad-answer-box,
    .keypad-answer-box {
        min-height: 38px !important;
        height: 38px !important;
        font-size: 22px !important;
        padding: 0 8px !important;
        border-radius: 10px !important;
        line-height: 38px !important;
        box-sizing: border-box !important;
    }

    .keypad-grid {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 5px !important;
        width: 100% !important;
        margin: 0 !important;
        box-sizing: border-box !important;
    }

    #championship-play .champ-key-btn,
    .champ-key-btn,
    .ws-key-btn,
    .key-btn {
        height: 42px !important;
        font-size: 20px !important;
        font-weight: 800 !important;
        border-radius: 11px !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .key-btn.backspace-key {
        height: 42px !important;
        font-size: 16px !important;
        border-radius: 11px !important;
    }

    #champ-key-submit {
        height: 42px !important;
        font-size: 13px !important;
        font-weight: 800 !important;
        border-radius: 11px !important;
    }

    .play-header-row {
        margin-bottom: 4px;
        gap: 6px;
    }

    .play-header-font-control {
        height: 26px !important;
        padding: 1px 4px !important;
        gap: 2px !important;
    }

    .play-header-font-control .size-btn {
        font-size: 15px !important;
        padding: 0 3px !important;
    }

    .play-header-font-control .size-label {
        font-size: 11px !important;
    }

    .btn-play-action,
    .btn-play-settings-toggle {
        padding: 3px 8px;
        font-size: 11px;
        height: 26px;
    }

    .play-timer-badge {
        padding: 3px 8px;
        font-size: 11px;
        height: 26px;
    }

    .btn-keypad-submit {
        height: 38px !important;
        font-size: 13px !important;
        font-weight: 800 !important;
        border-radius: 10px !important;
        min-width: 78px !important;
        padding: 0 6px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        box-sizing: border-box !important;
    }

    .btn-keypad-end,
    .btn-keypad-skip {
        padding: 6px;
        font-size: 12px;
        border-radius: 9px;
    }

    .ws-keypad-container {
        padding: 4px 8px calc(4px + env(safe-area-inset-bottom, 0px));
        bottom: 0;
    }

    .ws-keypad-grid {
        gap: 4px !important;
        max-width: 360px;
    }

    .app-container {
        padding: 6px 8px;
    }
}

/* ==========================================================================
   BREAKPOINT 3: MOBILE PHONES SHORT LANDSCAPE (<= 520px height)
   ========================================================================== */
@media (max-height: 520px) and (orientation: landscape) {
    .champ-play-grid,
    .play-layout {
        display: grid !important;
        grid-template-columns: 1.15fr 0.85fr !important;
        gap: 8px !important;
        max-width: 100% !important;
        margin: 0 auto !important;
        align-items: stretch !important;
    }

    .champ-main-left,
    .champ-main-right {
        width: 100% !important;
        gap: 4px !important;
    }

    .champ-play-hud {
        padding: 3px 8px !important;
        margin-bottom: 4px !important;
        border-radius: 8px !important;
    }

    #champ-que-progress,
    #champ-timer-countdown {
        font-size: 11px !important;
    }

    #championship-play .vertical-display-box,
    .vertical-display-box {
        min-height: 130px !important;
        max-height: calc(100vh - 65px) !important;
        height: 100% !important;
        padding: 4px 8px !important;
        margin: 0 !important;
        border-radius: 12px !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
    }

    #championship-play .kids-keypad-card,
    .kids-keypad-card {
        padding: 4px 6px !important;
        gap: 4px !important;
        border-radius: 12px !important;
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
    }

    .keypad-top-row {
        display: grid !important;
        grid-template-columns: 34px 1fr 68px !important;
        gap: 4px !important;
        height: 32px !important;
        margin: 0 0 2px 0 !important;
    }

    #championship-play .keypad-top-row {
        display: grid !important;
        grid-template-columns: 34px 1fr 34px !important;
        gap: 4px !important;
        height: 32px !important;
        margin: 0 0 2px 0 !important;
    }

    #championship-play .btn-keypad-clear,
    .btn-keypad-clear {
        height: 32px !important;
        font-size: 14px !important;
        border-radius: 8px !important;
        padding: 0 !important;
    }

    #championship-play .keypad-answer-box,
    .keypad-answer-box {
        min-height: 32px !important;
        height: 32px !important;
        font-size: 17px !important;
        padding: 0 6px !important;
        border-radius: 8px !important;
        line-height: 32px !important;
    }

    #championship-play .keypad-grid,
    .keypad-grid {
        gap: 3px !important;
        margin: 0 !important;
    }

    #championship-play .champ-key-btn,
    .champ-key-btn,
    .ws-key-btn,
    .key-btn {
        height: 30px !important;
        font-size: 15px !important;
        font-weight: 800 !important;
        border-radius: 8px !important;
        padding: 0 !important;
    }

    #champ-key-submit {
        height: 30px !important;
        font-size: 11px !important;
        border-radius: 8px !important;
    }

    .btn-keypad-submit {
        height: 32px !important;
        font-size: 11px !important;
        border-radius: 8px !important;
        min-width: 68px !important;
        padding: 0 4px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }
}

/* Solve Input / Answer Box */
.ws-answer-box {
    width: 100%;
    height: 48px;
    font-size: 20px;
    font-weight: 800;
    text-align: center;
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.15);
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-main, #f0efff);
    outline: none;
    transition: all 0.2s ease;
    box-sizing: border-box;
}

.ws-answer-box:focus,
.ws-answer-box.active-focus {
    border-color: var(--primary, #6c63ff);
    background-color: rgba(108, 99, 255, 0.15);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.3);
}

/* ==========================================================================
   COMING SOON SHOWCASE STYLES (Arithmetic & Algebra)
   ========================================================================== */
.coming-soon-container {
    max-width: 800px;
    margin: 0 auto 30px;
    text-align: center;
}

.coming-soon-hero {
    background: linear-gradient(135deg, rgba(34, 26, 61, 0.9) 0%, rgba(44, 34, 78, 0.7) 100%);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 36px 24px;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.coming-soon-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 60%);
    opacity: 0.4;
    pointer-events: none;
}

.cs-badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: linear-gradient(135deg, rgba(255, 155, 133, 0.25) 0%, rgba(255, 95, 95, 0.35) 100%);
    border: 1px solid var(--secondary);
    color: var(--secondary);
    margin-bottom: 16px;
    box-shadow: 0 4px 14px var(--secondary-glow);
}

.cs-badge-pill.cs-badge-success {
    background: rgba(91, 243, 195, 0.15);
    border-color: var(--success);
    color: var(--success);
    box-shadow: 0 4px 14px rgba(91, 243, 195, 0.25);
}

.btn-champ-host {
    background-color: var(--primary);
    color: #161226;
    margin-top: 0;
    padding: 16px;
    font-size: 16px;
    font-weight: 800;
    border-radius: 16px;
    box-shadow: 0 6px 20px var(--primary-glow);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-champ-join {
    background-color: var(--secondary);
    color: #161226;
    margin-top: 0;
    padding: 16px;
    font-size: 16px;
    font-weight: 800;
    border-radius: 16px;
    box-shadow: 0 6px 20px var(--secondary-glow);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-switch-to-abacus {
    width: auto;
    margin: 0 auto;
    padding: 12px 28px;
    background-color: var(--secondary);
    color: #161226;
    font-weight: 800;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-switch-to-abacus.btn-switch-algebra {
    background-color: #ffd166;
    color: #161226;
}

.cs-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.cs-desc {
    font-size: 15px;
    color: var(--text-muted);
    max-width: 580px;
    margin: 0 auto 20px;
    line-height: 1.6;
}

.feature-preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.preview-feature-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 20px 16px;
    text-align: center;
    transition: all 0.25s ease;
}

.preview-feature-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.pfc-icon {
    font-size: 36px;
    margin-bottom: 12px;
    display: inline-block;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.pfc-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 6px;
}

.pfc-desc {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
}

@media (max-width: 680px) {
    .feature-preview-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   ACCOUNT MODAL (LOGIN / SIGNUP PREVIEW)
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 8, 18, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 16px;
    animation: fadeIn 0.2s ease-out;
}

.modal-card {
    background: linear-gradient(135deg, #221a3d 0%, #1a1430 100%);
    border: 1px solid rgba(203, 186, 255, 0.25);
    border-radius: 24px;
    padding: 32px 28px;
    width: 100%;
    max-width: 480px;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 30px var(--primary-glow);
    animation: modalPop 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalPop {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 20px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    line-height: 1;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-main);
    transform: scale(1.1);
}

.modal-hero {
    text-align: center;
    margin-bottom: 20px;
}

.modal-avatar-bounce {
    font-size: 48px;
    margin-bottom: 8px;
    display: inline-block;
    animation: bounceAvatar 2s infinite ease-in-out;
}

@keyframes bounceAvatar {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.modal-hero h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 6px;
}

.modal-hero p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

.account-feature-list {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 14px 16px;
    margin-bottom: 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.af-item {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
}

.af-item span {
    font-size: 18px;
}

.account-badge-notice {
    background: rgba(91, 243, 195, 0.08);
    border: 1px solid rgba(91, 243, 195, 0.25);
    border-radius: 14px;
    padding: 12px;
    text-align: center;
}

.account-badge-notice .badge-pill {
    font-size: 12px;
    font-weight: 800;
    color: var(--success);
    letter-spacing: 0.5px;
}

/* ==========================================================================
   THEME TOGGLE BUTTON & LIGHT MODE COMPONENT OVERRIDES
   ========================================================================== */
.btn-theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 12px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    box-sizing: border-box;
    white-space: nowrap;
}

.btn-theme-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-1px);
    border-color: var(--primary);
}

[data-theme="light"] .btn-theme-toggle, 
[data-theme="day"] .btn-theme-toggle {
    background: #f0edf9;
    color: #17122b;
    border-color: rgba(92, 62, 214, 0.2);
}

[data-theme="light"] .btn-theme-toggle:hover, 
[data-theme="day"] .btn-theme-toggle:hover {
    background: #e4dff7;
    border-color: #5c3ed6;
}

/* Light Theme Component Overrides */
[data-theme="light"] .app-container,
[data-theme="day"] .app-container {
    background-color: var(--bg-dark);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    border-color: rgba(92, 62, 214, 0.15);
}

[data-theme="light"] .card,
[data-theme="day"] .card {
    background-color: var(--bg-card);
    border-color: rgba(92, 62, 214, 0.12);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .card-buddy,
[data-theme="day"] .card-buddy {
    background: linear-gradient(135deg, rgba(92, 62, 214, 0.08) 0%, rgba(230, 81, 0, 0.06) 100%);
    border-color: rgba(92, 62, 214, 0.2);
}

[data-theme="light"] .mode-btn,
[data-theme="day"] .mode-btn {
    background: #ffffff;
    border-color: rgba(92, 62, 214, 0.15);
    color: #4a4365;
}

[data-theme="light"] .mode-btn.active,
[data-theme="day"] .mode-btn.active {
    background: linear-gradient(135deg, #5c3ed6 0%, #7b62e6 100%);
    color: #ffffff;
    border-color: #5c3ed6;
    box-shadow: 0 6px 18px rgba(92, 62, 214, 0.3);
}

[data-theme="light"] .play-timer-badge,
[data-theme="day"] .play-timer-badge {
    background: #f4f2fb;
    border-color: rgba(92, 62, 214, 0.18);
    color: #5c3ed6;
}

[data-theme="light"] .btn-play-action,
[data-theme="day"] .btn-play-action {
    background: #ffffff;
    border-color: rgba(92, 62, 214, 0.18);
    color: #17122b;
}

[data-theme="light"] .btn-play-settings-toggle,
[data-theme="day"] .btn-play-settings-toggle {
    background: #ffffff;
    border-color: rgba(92, 62, 214, 0.2);
    color: #5c3ed6;
}

[data-theme="light"] .btn-play-settings-toggle.active,
[data-theme="day"] .btn-play-settings-toggle.active {
    background: #ede9fe;
}

[data-theme="light"] .play-settings-drawer,
[data-theme="day"] .play-settings-drawer {
    background: #ffffff;
    border-color: rgba(92, 62, 214, 0.18);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] #practice-pause-overlay,
[data-theme="day"] #practice-pause-overlay {
    background: rgba(255, 255, 255, 0.95);
}

[data-theme="light"] .vertical-display-box,
[data-theme="day"] .vertical-display-box {
    background: #ffffff;
    border-color: rgba(92, 62, 214, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .stacked-number,
[data-theme="day"] .stacked-number,
[data-theme="light"] .stacked-number-row,
[data-theme="day"] .stacked-number-row {
    color: #17122b;
}

[data-theme="light"] .btn-keypad-clear,
[data-theme="day"] .btn-keypad-clear {
    background-color: #ede9fe;
    color: #5c3ed6;
}

[data-theme="light"] .btn-keypad-submit,
[data-theme="day"] .btn-keypad-submit {
    background-color: #5c3ed6;
    color: #ffffff;
}

[data-theme="light"] .kids-keypad-card,
[data-theme="day"] .kids-keypad-card {
    background-color: #ffffff;
    border-color: rgba(92, 62, 214, 0.15);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .key-btn,
[data-theme="day"] .key-btn {
    background: #f4f2fb;
    color: #17122b;
    border-color: rgba(92, 62, 214, 0.18);
    box-shadow: 0 4px 0 rgba(92, 62, 214, 0.18);
}

[data-theme="light"] .key-btn:active,
[data-theme="day"] .key-btn:active {
    box-shadow: 0 1px 0 rgba(92, 62, 214, 0.18);
    transform: translateY(3px);
}

[data-theme="light"] .keypad-answer-box,
[data-theme="day"] .keypad-answer-box {
    background: #f8f6fd;
    color: #5c3ed6;
    border-color: rgba(92, 62, 214, 0.25);
}

[data-theme="light"] .ws-keypad-container,
[data-theme="day"] .ws-keypad-container {
    background-color: #f7f6fc;
    border-top: 1px solid rgba(92, 62, 214, 0.2);
    box-shadow: 0 -8px 30px rgba(92, 62, 214, 0.12);
}

[data-theme="light"] .ws-key-btn,
[data-theme="light"] .champ-key-btn,
[data-theme="day"] .ws-key-btn,
[data-theme="day"] .champ-key-btn {
    background-color: #ffffff;
    border-color: rgba(92, 62, 214, 0.18);
    color: #17122b;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .ws-key-btn:active,
[data-theme="light"] .champ-key-btn:active,
[data-theme="day"] .ws-key-btn:active,
[data-theme="day"] .champ-key-btn:active {
    background-color: #ede9fe !important;
    color: #5c3ed6 !important;
    border-color: #5c3ed6 !important;
}

[data-theme="light"] .ws-key-btn.secondary-key,
[data-theme="light"] .champ-key-btn.secondary-key,
[data-theme="day"] .ws-key-btn.secondary-key,
[data-theme="day"] .champ-key-btn.secondary-key {
    background-color: #f3f0fb;
    color: var(--secondary, #7c3aed);
}

[data-theme="light"] .ws-key-btn.danger-key,
[data-theme="light"] .champ-key-btn.danger-key,
[data-theme="day"] .ws-key-btn.danger-key,
[data-theme="day"] .champ-key-btn.danger-key {
    background-color: rgba(255, 95, 95, 0.12);
    color: #e03131;
    border-color: rgba(255, 95, 95, 0.25);
}

[data-theme="light"] .ws-key-btn.success-key,
[data-theme="light"] .champ-key-btn.success-key,
[data-theme="day"] .ws-key-btn.success-key,
[data-theme="day"] .champ-key-btn.success-key {
    background-color: rgba(18, 184, 134, 0.15);
    color: #0ca678;
    border-color: rgba(18, 184, 134, 0.3);
}

[data-theme="light"] .ws-answer-box,
[data-theme="day"] .ws-answer-box {
    background-color: #ffffff;
    border-color: rgba(92, 62, 214, 0.25);
    color: #17122b;
}

[data-theme="light"] .ws-answer-box:focus,
[data-theme="light"] .ws-answer-box.active-focus,
[data-theme="day"] .ws-answer-box:focus,
[data-theme="day"] .ws-answer-box.active-focus {
    border-color: #5c3ed6;
    background-color: #f5f3ff;
    box-shadow: 0 0 0 3px rgba(92, 62, 214, 0.2);
}

[data-theme="light"] .selector-pill,
[data-theme="day"] .selector-pill {
    background: #f0edf9;
    color: #4a4365;
    border-color: rgba(92, 62, 214, 0.15);
}

[data-theme="light"] .selector-pill.active,
[data-theme="day"] .selector-pill.active {
    background: #5c3ed6;
    color: #ffffff;
    border-color: #5c3ed6;
    box-shadow: 0 4px 12px rgba(92, 62, 214, 0.25);
}

[data-theme="light"] .styled-num-input,
[data-theme="day"] .styled-num-input,
[data-theme="light"] .custom-select,
[data-theme="day"] .custom-select {
    background: #f8f7fd;
    color: #17122b;
    border-color: rgba(92, 62, 214, 0.2);
}

[data-theme="light"] .tier1-tab,
[data-theme="day"] .tier1-tab {
    background: #f0edf9;
    color: #4a4365;
    border-color: rgba(92, 62, 214, 0.12);
}

[data-theme="light"] .tier1-tab.active,
[data-theme="day"] .tier1-tab.active {
    background: #5c3ed6;
    color: #ffffff;
    border-color: #5c3ed6;
}

[data-theme="light"] .nav-link,
[data-theme="day"] .nav-link {
    background: #f0edf9;
    color: #4a4365;
    border-color: rgba(92, 62, 214, 0.12);
}

[data-theme="light"] .nav-link.active,
[data-theme="day"] .nav-link.active {
    background: #5c3ed6;
    color: #ffffff;
    border-color: #5c3ed6;
}

[data-theme="light"] .btn-account,
[data-theme="day"] .btn-account {
    background: #f0edf9;
    color: #17122b;
    border-color: rgba(92, 62, 214, 0.2);
}

[data-theme="light"] .modal-box,
[data-theme="day"] .modal-box {
    background: #ffffff;
    color: #17122b;
    border-color: rgba(92, 62, 214, 0.2);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .modal-tab-btn,
[data-theme="day"] .modal-tab-btn {
    background: #f0edf9;
    color: #4a4365;
}

[data-theme="light"] .modal-tab-btn.active,
[data-theme="day"] .modal-tab-btn.active {
    background: #5c3ed6;
    color: #ffffff;
}

[data-theme="light"] .form-input,
[data-theme="day"] .form-input {
    background: #f8f7fd;
    color: #17122b;
    border-color: rgba(92, 62, 214, 0.2);
}

[data-theme="light"] .play-timer,
[data-theme="day"] .play-timer {
    background: #f0edf9;
    color: #5c3ed6;
    border-color: rgba(92, 62, 214, 0.2);
}

[data-theme="light"] .btn-secondary,
[data-theme="day"] .btn-secondary {
    background: #f0edf9;
    color: #17122b;
    border-color: rgba(92, 62, 214, 0.2);
}

[data-theme="light"] .btn-primary,
[data-theme="day"] .btn-primary,
[data-theme="light"] .btn-action-primary,
[data-theme="day"] .btn-action-primary {
    background: linear-gradient(135deg, #5c3ed6 0%, #7b62e6 100%) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 14px rgba(92, 62, 214, 0.35);
}

[data-theme="light"] .btn-primary:hover,
[data-theme="day"] .btn-primary:hover,
[data-theme="light"] .btn-action-primary:hover,
[data-theme="day"] .btn-action-primary:hover {
    box-shadow: 0 6px 20px rgba(92, 62, 214, 0.45);
    transform: translateY(-1px);
    color: #ffffff !important;
}

[data-theme="light"] .btn-action-secondary,
[data-theme="day"] .btn-action-secondary {
    background: #f0edf9;
    color: #17122b;
    border: 1px solid rgba(92, 62, 214, 0.2);
}

[data-theme="light"] .btn-action-secondary:hover,
[data-theme="day"] .btn-action-secondary:hover {
    background: #e4dff7;
}

[data-theme="light"] .btn-action-danger,
[data-theme="day"] .btn-action-danger {
    background: rgba(255, 95, 95, 0.12);
    color: #d32f2f;
    border: 1px solid rgba(255, 95, 95, 0.3);
}

[data-theme="light"] .btn-action-whatsapp,
[data-theme="day"] .btn-action-whatsapp {
    background: rgba(37, 211, 102, 0.15);
    color: #0b8a4b;
    border: 1px solid rgba(37, 211, 102, 0.4);
}

/* Day Mode Switches / Sliders & Settings Row Overrides */
[data-theme="light"] .slider,
[data-theme="day"] .slider {
    background-color: #dcd7ee;
    border: 1px solid rgba(92, 62, 214, 0.25);
}

[data-theme="light"] .slider:before,
[data-theme="day"] .slider:before {
    background-color: #ffffff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] input:checked + .slider,
[data-theme="day"] input:checked + .slider {
    background-color: #5c3ed6;
    border-color: #5c3ed6;
}

[data-theme="light"] input:checked + .slider:before,
[data-theme="day"] input:checked + .slider:before {
    background-color: #ffffff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

[data-theme="light"] .setting-label,
[data-theme="day"] .setting-label {
    color: #17122b;
}

[data-theme="light"] .setting-sublabel,
[data-theme="day"] .setting-sublabel {
    color: #645e7e;
}

[data-theme="light"] .inc-btn,
[data-theme="day"] .inc-btn {
    background-color: #f0edf9;
    border-color: rgba(92, 62, 214, 0.2);
    color: #17122b;
}

[data-theme="light"] .inc-btn:hover,
[data-theme="day"] .inc-btn:hover {
    background-color: #e4dff7;
}

[data-theme="light"] .inc-value,
[data-theme="day"] .inc-value {
    color: #17122b;
}

[data-theme="light"] .info-icon,
[data-theme="day"] .info-icon {
    background: #f0edf9;
    color: #5c3ed6;
    border-color: rgba(92, 62, 214, 0.25);
}

/* Rank Badges & Color Helpers with Day/Night Mode Contrast */
.rank-pill-gold {
    background: rgba(255, 215, 0, 0.16);
    color: #ffd700;
    padding: 2px 7px;
    border-radius: 6px;
    font-weight: 800;
    display: inline-block;
    border: 1px solid rgba(255, 215, 0, 0.3);
    letter-spacing: 0.3px;
}

.rank-trophy-text {
    color: #f59e0b;
    font-weight: 800;
}

[data-theme="light"] .rank-trophy-text,
[data-theme="day"] .rank-trophy-text {
    color: #d97706 !important;
}

.rank-gold-text {
    color: #ffd700;
    font-weight: 800;
}

[data-theme="light"] .rank-gold-text,
[data-theme="day"] .rank-gold-text {
    color: #b45309 !important;
}

.rank-silver-text {
    color: #d1d5db;
    font-weight: 800;
}

[data-theme="light"] .rank-silver-text,
[data-theme="day"] .rank-silver-text {
    color: #4b5563 !important;
}

.rank-bronze-text {
    color: #fb923c;
    font-weight: 800;
}

[data-theme="light"] .rank-bronze-text,
[data-theme="day"] .rank-bronze-text {
    color: #9a3412 !important;
}

/* Rank Award Badges / Pills */
.rank-pill-trophy {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 800;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.25) 0%, rgba(217, 119, 6, 0.35) 100%);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.6);
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.2);
}

.rank-pill-gold {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 800;
    background: rgba(234, 179, 8, 0.18);
    color: #facc15;
    border: 1px solid rgba(234, 179, 8, 0.5);
}

.rank-pill-silver {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 800;
    background: rgba(203, 213, 225, 0.18);
    color: #e2e8f0;
    border: 1px solid rgba(203, 213, 225, 0.5);
}

.rank-pill-bronze {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 800;
    background: rgba(249, 115, 22, 0.18);
    color: #fb923c;
    border: 1px solid rgba(249, 115, 22, 0.5);
}

[data-theme="light"] .rank-pill-trophy,
[data-theme="day"] .rank-pill-trophy {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%) !important;
    color: #92400e !important;
    border: 1px solid #f59e0b !important;
}

[data-theme="light"] .rank-pill-gold,
[data-theme="day"] .rank-pill-gold {
    background: #fef9c3 !important;
    color: #854d0e !important;
    border: 1px solid #eab308 !important;
}

[data-theme="light"] .rank-pill-silver,
[data-theme="day"] .rank-pill-silver {
    background: #f1f5f9 !important;
    color: #334155 !important;
    border: 1px solid #cbd5e1 !important;
}

[data-theme="light"] .rank-pill-bronze,
[data-theme="day"] .rank-pill-bronze {
    background: #ffedd5 !important;
    color: #9a3412 !important;
    border: 1px solid #f97316 !important;
}

/* 4 Winners Podium Grid & Cards */
.champ-winners-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 24px;
    width: 100%;
}

@media (max-width: 768px) {
    .champ-winners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
}

.champ-winner-card {
    padding: 16px 12px;
    border-radius: 16px;
    text-align: center;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.champ-winner-card:hover {
    transform: translateY(-2px);
}

.champ-winner-card.is-self {
    outline: 2px solid var(--primary);
}

.champ-winner-card.rank-1 {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.24) 0%, rgba(30, 24, 54, 0.7) 100%);
    border: 2px solid rgba(245, 158, 11, 0.65);
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.2);
}

.champ-winner-card.rank-2 {
    background: linear-gradient(135deg, rgba(234, 179, 8, 0.18) 0%, rgba(30, 24, 54, 0.6) 100%);
    border: 1.5px solid rgba(234, 179, 8, 0.45);
}

.champ-winner-card.rank-3 {
    background: linear-gradient(135deg, rgba(203, 213, 225, 0.18) 0%, rgba(30, 24, 54, 0.6) 100%);
    border: 1.5px solid rgba(203, 213, 225, 0.45);
}

.champ-winner-card.rank-4 {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.18) 0%, rgba(30, 24, 54, 0.6) 100%);
    border: 1.5px solid rgba(249, 115, 22, 0.45);
}

[data-theme="light"] .champ-winner-card.rank-1,
[data-theme="day"] .champ-winner-card.rank-1 {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%) !important;
    border: 2px solid #f59e0b !important;
    box-shadow: 0 4px 16px rgba(245, 158, 11, 0.15) !important;
}

[data-theme="light"] .champ-winner-card.rank-2,
[data-theme="day"] .champ-winner-card.rank-2 {
    background: linear-gradient(135deg, #ffffff 0%, #fef9c3 100%) !important;
    border: 1.5px solid #eab308 !important;
}

[data-theme="light"] .champ-winner-card.rank-3,
[data-theme="day"] .champ-winner-card.rank-3 {
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%) !important;
    border: 1.5px solid #cbd5e1 !important;
}

[data-theme="light"] .champ-winner-card.rank-4,
[data-theme="day"] .champ-winner-card.rank-4 {
    background: linear-gradient(135deg, #ffffff 0%, #ffedd5 100%) !important;
    border: 1.5px solid #f97316 !important;
}

/* Coming Soon & Champions League Hub Light / Day Mode Overrides */
[data-theme="light"] .coming-soon-hero,
[data-theme="day"] .coming-soon-hero {
    background: linear-gradient(135deg, #ffffff 0%, #f4f1fd 100%) !important;
    border: 1px solid rgba(92, 62, 214, 0.18) !important;
    box-shadow: 0 10px 30px rgba(92, 62, 214, 0.08) !important;
}

[data-theme="light"] .coming-soon-hero::before,
[data-theme="day"] .coming-soon-hero::before {
    background: radial-gradient(circle, rgba(92, 62, 214, 0.1) 0%, transparent 60%) !important;
    opacity: 0.5 !important;
}

[data-theme="light"] .cs-title,
[data-theme="day"] .cs-title {
    color: #17122b !important;
}

[data-theme="light"] .cs-desc,
[data-theme="day"] .cs-desc {
    color: #554d74 !important;
}

[data-theme="light"] .cs-badge-pill,
[data-theme="day"] .cs-badge-pill {
    background: linear-gradient(135deg, rgba(230, 81, 0, 0.1) 0%, rgba(230, 81, 0, 0.15) 100%) !important;
    border: 1px solid rgba(230, 81, 0, 0.35) !important;
    color: #e65100 !important;
    box-shadow: 0 2px 10px rgba(230, 81, 0, 0.12) !important;
}

[data-theme="light"] .cs-badge-pill.cs-badge-success,
[data-theme="day"] .cs-badge-pill.cs-badge-success {
    background: rgba(11, 158, 105, 0.12) !important;
    border: 1px solid rgba(11, 158, 105, 0.35) !important;
    color: #0b9e69 !important;
    box-shadow: 0 2px 10px rgba(11, 158, 105, 0.12) !important;
}

[data-theme="light"] .btn-champ-host,
[data-theme="day"] .btn-champ-host {
    background: linear-gradient(135deg, #5c3ed6 0%, #7b62e6 100%) !important;
    color: #ffffff !important;
    box-shadow: 0 6px 20px rgba(92, 62, 214, 0.3) !important;
}

[data-theme="light"] .btn-champ-join,
[data-theme="day"] .btn-champ-join {
    background: linear-gradient(135deg, #e65100 0%, #f57c00 100%) !important;
    color: #ffffff !important;
    box-shadow: 0 6px 20px rgba(230, 81, 0, 0.3) !important;
}

[data-theme="light"] .btn-switch-to-abacus,
[data-theme="day"] .btn-switch-to-abacus {
    background: linear-gradient(135deg, #e65100 0%, #f57c00 100%) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 14px rgba(230, 81, 0, 0.25) !important;
}

[data-theme="light"] .btn-switch-to-abacus.btn-switch-algebra,
[data-theme="day"] .btn-switch-to-abacus.btn-switch-algebra {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.25) !important;
}

[data-theme="light"] .preview-feature-card,
[data-theme="day"] .preview-feature-card {
    background: #ffffff !important;
    border: 1px solid rgba(92, 62, 214, 0.12) !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04) !important;
}

[data-theme="light"] .preview-feature-card:hover,
[data-theme="day"] .preview-feature-card:hover {
    background: #fdfcff !important;
    border-color: #5c3ed6 !important;
    box-shadow: 0 8px 24px rgba(92, 62, 214, 0.12) !important;
}

[data-theme="light"] .pfc-title,
[data-theme="day"] .pfc-title {
    color: #17122b !important;
    font-weight: 700;
}

[data-theme="light"] .pfc-desc,
[data-theme="day"] .pfc-desc {
    color: #554d74 !important;
}

[data-theme="light"] .champ-winner-card,
[data-theme="day"] .champ-winner-card {
    background: linear-gradient(135deg, rgba(11, 158, 105, 0.1) 0%, #ffffff 100%) !important;
    border: 1px solid rgba(11, 158, 105, 0.3) !important;
}

[data-theme="light"] #champ-code-board,
[data-theme="day"] #champ-code-board {
    background: #f8f7fd !important;
    border: 1px solid rgba(92, 62, 214, 0.16) !important;
}

[data-theme="light"] #champ-host-live-panel,
[data-theme="day"] #champ-host-live-panel {
    background: #f8f7fd !important;
    border: 1px solid rgba(92, 62, 214, 0.16) !important;
}

[data-theme="light"] .champ-table-responsive,
[data-theme="day"] .champ-table-responsive {
    background-color: #ffffff !important;
    border: 1px solid rgba(92, 62, 214, 0.15) !important;
}

[data-theme="light"] .champ-leaderboard-table th,
[data-theme="day"] .champ-leaderboard-table th {
    background-color: #f0edf9 !important;
    color: #554d74 !important;
    border-bottom: 2px solid rgba(92, 62, 214, 0.15) !important;
}

[data-theme="light"] .champ-leaderboard-table td,
[data-theme="day"] .champ-leaderboard-table td {
    color: #17122b !important;
    border-bottom: 1px solid rgba(92, 62, 214, 0.08) !important;
}

[data-theme="light"] .champ-leaderboard-table tr:nth-child(even),
[data-theme="day"] .champ-leaderboard-table tr:nth-child(even) {
    background-color: #f9f8fe !important;
}

/* ==========================================================================
   GLOBAL PWA INSTALL BOTTOM SLIDE-UP POPUP / SHEET
   ========================================================================== */
.pwa-bottom-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 10000;
    display: flex;
    justify-content: center;
    padding: 0 16px 20px 16px;
    pointer-events: none;
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.35s ease, visibility 0.45s;
    transform: translateY(120%);
    opacity: 0;
    visibility: hidden;
}

.pwa-bottom-sheet.show {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.pwa-bottom-sheet-content {
    position: relative;
    width: 100%;
    max-width: 560px;
    background: linear-gradient(135deg, rgba(28, 22, 50, 0.96) 0%, rgba(18, 14, 32, 0.98) 100%);
    border: 1px solid rgba(203, 155, 81, 0.35);
    border-radius: 20px;
    padding: 16px 20px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.65), 0 0 24px rgba(203, 155, 81, 0.15), inset 0 1px 1px rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-sizing: border-box;
}

[data-theme="light"] .pwa-bottom-sheet-content,
[data-theme="day"] .pwa-bottom-sheet-content {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.97) 0%, rgba(246, 248, 252, 0.98) 100%);
    border: 1px solid rgba(203, 155, 81, 0.45);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15), 0 0 20px rgba(203, 155, 81, 0.15);
}

.pwa-sheet-close {
    position: absolute;
    top: 10px;
    right: 12px;
    background: rgba(255, 255, 255, 0.08);
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    line-height: 1;
    transition: background 0.2s, color 0.2s, transform 0.2s;
}

.pwa-sheet-close:hover {
    background: rgba(255, 95, 95, 0.2);
    color: #ff5f5f;
    transform: scale(1.08);
}

.pwa-sheet-body {
    display: flex;
    align-items: center;
    gap: 16px;
}

.pwa-sheet-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: 14px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(203, 155, 81, 0.3);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.pwa-app-icon {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pwa-sheet-info {
    flex-grow: 1;
    min-width: 0;
}

.pwa-sheet-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--secondary);
    background: rgba(91, 243, 195, 0.12);
    border: 1px solid rgba(91, 243, 195, 0.25);
    padding: 2px 7px;
    border-radius: 6px;
    margin-bottom: 3px;
}

.pwa-sheet-title {
    margin: 0;
    font-size: 15px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.2;
}

.pwa-sheet-desc {
    margin: 3px 0 0;
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.35;
}

.pwa-ios-instructions {
    margin-top: 6px;
    padding: 6px 10px;
    background: rgba(203, 155, 81, 0.1);
    border: 1px solid rgba(203, 155, 81, 0.25);
    border-radius: 8px;
    font-size: 11px;
    color: var(--text-main);
    line-height: 1.4;
}

.pwa-sheet-actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}

.btn-pwa-install-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 16px;
    background: linear-gradient(135deg, var(--secondary) 0%, #059669 100%);
    color: #161226;
    font-size: 13px;
    font-weight: 800;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(91, 243, 195, 0.3);
    transition: transform 0.15s, box-shadow 0.15s;
    white-space: nowrap;
}

.btn-pwa-install-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(91, 243, 195, 0.45);
}

.btn-pwa-later-action {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    padding: 3px 6px;
    text-align: center;
    transition: color 0.15s;
}

.btn-pwa-later-action:hover {
    color: var(--text-main);
}

@media (max-width: 600px) {
    .pwa-bottom-sheet {
        padding: 0 10px calc(12px + env(safe-area-inset-bottom, 0px)) 10px;
    }

    .pwa-bottom-sheet-content {
        padding: 14px 14px 14px 14px;
        border-radius: 16px;
    }

    .pwa-sheet-body {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 12px;
    }

    .pwa-sheet-icon {
        width: 44px;
        height: 44px;
    }

    .pwa-sheet-info {
        flex: 1 1 calc(100% - 60px);
    }

    .pwa-sheet-actions {
        flex-direction: row;
        width: 100%;
        margin-top: 4px;
    }

    .btn-pwa-install-action {
        flex: 1;
        padding: 10px 14px;
    }

    .btn-pwa-later-action {
        padding: 10px 12px;
    }
}

/* Question Performance Matrix & Championship Results Table Styling */
.portal-table-wrapper {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow-x: auto;
}

.matrix-sticky-col {
    position: sticky;
    left: 0;
    z-index: 2;
    background: #1a152e;
    color: var(--text-main, #f0efff) !important;
    font-weight: 700;
    box-shadow: 2px 0 6px rgba(0, 0, 0, 0.3);
    border-right: 1px solid var(--border-color, rgba(255, 255, 255, 0.1));
}

th.matrix-sticky-col {
    z-index: 3;
    background: #201a38;
    color: var(--text-muted, #a59fc2) !important;
    font-weight: 800;
    text-transform: uppercase;
}

.champ-capture-box {
    background: rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .portal-table-wrapper,
[data-theme="day"] .portal-table-wrapper {
    background: #ffffff;
    border-color: rgba(92, 62, 214, 0.14);
}

[data-theme="light"] .champ-capture-box,
[data-theme="day"] .champ-capture-box {
    background: #ffffff;
    border-color: rgba(92, 62, 214, 0.14);
}

[data-theme="light"] .matrix-sticky-col,
[data-theme="day"] .matrix-sticky-col {
    background: #ffffff !important;
    color: #17122b !important;
    border-right: 1px solid rgba(92, 62, 214, 0.14);
    box-shadow: 2px 0 6px rgba(92, 62, 214, 0.05);
}

[data-theme="light"] th.matrix-sticky-col,
[data-theme="day"] th.matrix-sticky-col {
    background: #f0edf9 !important;
    color: #4a4365 !important;
    border-right: 1px solid rgba(92, 62, 214, 0.18);
}

[data-theme="light"] tr:hover td.matrix-sticky-col,
[data-theme="day"] tr:hover td.matrix-sticky-col {
    background: #f7f5fd !important;
}

/* Password Visibility Toggle */
.password-toggle-wrapper {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
}

.password-toggle-wrapper input {
    padding-right: 44px !important;
}

.btn-password-toggle {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-muted, #94a3b8);
    padding: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    outline: none;
    transition: color 0.15s ease, background-color 0.15s ease, transform 0.1s ease;
    z-index: 2;
    -webkit-tap-highlight-color: transparent;
}

.btn-password-toggle:hover {
    color: var(--text-main, #ffffff);
    background: rgba(255, 255, 255, 0.08);
}

.btn-password-toggle:active {
    transform: translateY(-50%) scale(0.92);
}

.btn-password-toggle.active {
    color: var(--primary, #5bf3c3);
}

[data-theme="light"] .btn-password-toggle,
[data-theme="day"] .btn-password-toggle {
    color: #8b85a3;
}

[data-theme="light"] .btn-password-toggle:hover,
[data-theme="day"] .btn-password-toggle:hover {
    color: #17122b;
    background: rgba(92, 62, 214, 0.08);
}

[data-theme="light"] .btn-password-toggle.active,
[data-theme="day"] .btn-password-toggle.active {
    color: var(--primary, #5c3ed6);
}

/* ==========================================================================
   CHAMPIONSHIP PREVIEW & ADVANCE CREATION MODALS
   ========================================================================== */
.champ-preview-modal-card {
    background: linear-gradient(135deg, #1f1838 0%, #151028 100%);
    border: 1px solid rgba(203, 186, 255, 0.22);
    border-radius: 20px;
    padding: 24px;
    width: 100%;
    max-width: 640px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65), 0 0 35px var(--primary-glow);
    animation: modalPop 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="light"] .champ-preview-modal-card,
[data-theme="day"] .champ-preview-modal-card {
    background: linear-gradient(135deg, #ffffff 0%, #f4f0ff 100%);
    border-color: rgba(92, 62, 214, 0.2);
    box-shadow: 0 20px 50px rgba(92, 62, 214, 0.15);
}

.champ-preview-spec-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-main);
}

[data-theme="light"] .champ-preview-spec-pill,
[data-theme="day"] .champ-preview-spec-pill {
    background: rgba(92, 62, 214, 0.05);
}

.champ-sample-q-card {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-width: 140px;
    flex: 1;
}

[data-theme="light"] .champ-sample-q-card,
[data-theme="day"] .champ-sample-q-card {
    background: #ffffff;
    border-color: rgba(92, 62, 214, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.champ-sample-stack-row {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    font-family: 'JetBrains Mono', monospace, sans-serif;
    font-size: 17px;
    font-weight: 800;
    line-height: 1.25;
}

.champ-sample-stack-row .sign {
    width: 16px;
    text-align: left;
    color: var(--primary);
    font-size: 14px;
}

.champ-sample-stack-row .val {
    min-width: 44px;
    text-align: right;
    color: var(--text-main);
}

.champ-advance-code-box {
    background: rgba(91, 243, 195, 0.08);
    border: 2px dashed rgba(91, 243, 195, 0.4);
    border-radius: 16px;
    padding: 18px;
    text-align: center;
    margin: 16px 0;
}

[data-theme="light"] .champ-advance-code-box,
[data-theme="day"] .champ-advance-code-box {
    background: rgba(92, 62, 214, 0.06);
    border-color: rgba(92, 62, 214, 0.35);
}

/* Student Assignment Level Filter Styles */
.assign-level-filter-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
    overflow-x: auto;
    padding: 3px 1px 6px 1px;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.assign-level-filter-bar::-webkit-scrollbar {
    height: 4px;
}

.assign-level-filter-bar::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.assign-level-pill {
    padding: 3px 9px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s ease;
    user-select: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.assign-level-pill:hover {
    background: rgba(203, 186, 255, 0.12);
    color: var(--text-main);
    border-color: var(--primary);
}

.assign-level-pill.active {
    background: var(--primary) !important;
    color: #161226 !important;
    border-color: var(--primary) !important;
    font-weight: 800 !important;
    box-shadow: 0 2px 8px var(--primary-glow);
}

[data-theme="light"] .assign-level-pill,
[data-theme="day"] .assign-level-pill {
    background: #f0edf9;
    border-color: rgba(92, 62, 214, 0.18);
    color: #5c3ed6;
}

[data-theme="light"] .assign-level-pill:hover,
[data-theme="day"] .assign-level-pill:hover {
    background: #e4dff7;
    color: #3b22a1;
}

[data-theme="light"] .assign-level-pill.active,
[data-theme="day"] .assign-level-pill.active {
    background: #5c3ed6 !important;
    color: #ffffff !important;
    border-color: #5c3ed6 !important;
}