/* ============================================
   TurtlEdu - Classroom Smart Board Styles
   Designed for 65-86" touch displays
   ============================================ */

:root {
    --cr-bg: #0F0F1A;
    --cr-surface: #1A1A2E;
    --cr-surface-2: #252540;
    --cr-border: rgba(255,255,255,0.08);
    --cr-text: #FFFFFF;
    --cr-text-secondary: #94A3B8;
    --cr-text-muted: #64748B;
    --cr-primary: #7C3AED;
    --cr-secondary: #06B6D4;
    --cr-success: #10B981;
    --cr-danger: #EF4444;
    --cr-warning: #F59E0B;
    --cr-orange: #F97316;
    --cr-radius: 16px;
    --cr-radius-sm: 10px;
    --cr-radius-lg: 24px;

    /* Player Colors */
    --cr-p1: #EF4444; /* Red */
    --cr-p2: #3B82F6; /* Blue */
    --cr-p3: #10B981; /* Green */
    --cr-p4: #F59E0B; /* Yellow */
    --cr-p1-bg: rgba(239,68,68,0.15);
    --cr-p2-bg: rgba(59,130,246,0.15);
    --cr-p3-bg: rgba(16,185,129,0.15);
    --cr-p4-bg: rgba(245,158,11,0.15);
    --cr-p1-glow: 0 0 20px rgba(239,68,68,0.4);
    --cr-p2-glow: 0 0 20px rgba(59,130,246,0.4);
    --cr-p3-glow: 0 0 20px rgba(16,185,129,0.4);
    --cr-p4-glow: 0 0 20px rgba(245,158,11,0.4);
}

/* ── Base ── */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Nunito', sans-serif;
    background: var(--cr-bg);
    color: var(--cr-text);
    font-size: 24px;
    font-weight: 700;
    line-height: 1.4;
    overflow: hidden;
}

/* ── Fullscreen Container ── */
.cr-fullscreen {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ── Portrait Warning ── */
.cr-portrait-warning {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: var(--cr-bg);
    align-items: center;
    justify-content: center;
    text-align: center;
}
.cr-portrait-content { padding: 2rem; }
.cr-rotate-icon {
    font-size: 5rem;
    color: var(--cr-primary);
    margin-bottom: 1.5rem;
    display: block;
    animation: cr-rotate-hint 2s ease-in-out infinite;
}
@keyframes cr-rotate-hint {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(90deg); }
}
.cr-portrait-warning h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
}
.cr-portrait-warning p {
    font-size: 1.3rem;
    color: var(--cr-text-secondary);
}

@media (orientation: portrait) {
    .cr-portrait-warning { display: flex !important; }
    .cr-fullscreen { display: none !important; }
}

/* ── Index Page: Game List ── */
.cr-index-page {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.cr-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: var(--cr-surface);
    border-bottom: 1px solid var(--cr-border);
    flex-shrink: 0;
}

.cr-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--cr-text);
    text-decoration: none;
}
.cr-logo i { color: var(--cr-primary); font-size: 2rem; }
.cr-logo-badge {
    background: linear-gradient(135deg, var(--cr-primary), var(--cr-secondary));
    color: #fff;
    font-size: 0.6rem;
    font-weight: 900;
    padding: 2px 8px;
    border-radius: 8px;
    letter-spacing: 0.5px;
}

.cr-header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cr-back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--cr-surface-2);
    border: 1px solid var(--cr-border);
    color: var(--cr-text);
    padding: 0.6rem 1.2rem;
    border-radius: var(--cr-radius-sm);
    font-size: 1rem;
    font-weight: 800;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
}
.cr-back-btn:hover { background: var(--cr-primary); color: #fff; }

/* Filters */
.cr-filters {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 2rem;
    background: var(--cr-surface);
    border-bottom: 1px solid var(--cr-border);
    flex-shrink: 0;
    overflow-x: auto;
}

.cr-filter-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--cr-surface-2);
    border: 2px solid transparent;
    color: var(--cr-text-secondary);
    padding: 0.6rem 1.4rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 800;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
    text-decoration: none;
    min-height: 56px;
}
.cr-filter-btn:hover { border-color: var(--cr-primary); color: var(--cr-text); }
.cr-filter-btn.active {
    background: var(--cr-primary);
    color: #fff;
    border-color: var(--cr-primary);
}

.cr-grade-select {
    background: var(--cr-surface-2);
    border: 2px solid var(--cr-border);
    color: var(--cr-text);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 800;
    font-family: inherit;
    min-height: 56px;
    cursor: pointer;
    margin-left: auto;
}
.cr-grade-select:focus { outline: none; border-color: var(--cr-primary); }

/* Game Grid */
.cr-game-grid {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    align-content: start;
}

.cr-game-card {
    background: var(--cr-surface);
    border: 2px solid var(--cr-border);
    border-radius: var(--cr-radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.25s;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}
.cr-game-card:hover {
    border-color: var(--cr-primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(124,58,237,0.25);
}

.cr-card-thumb {
    height: 180px;
    position: relative;
    overflow: hidden;
}
.cr-card-thumb-default {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--cr-surface-2), var(--cr-bg));
}
.cr-card-thumb-default i {
    font-size: 3.5rem;
    color: var(--cr-primary);
}
.cr-card-thumb-default span {
    font-size: 0.85rem;
    color: var(--cr-text-muted);
    font-weight: 800;
}

.cr-card-play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(124,58,237,0.0);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.cr-game-card:hover .cr-card-play-overlay {
    background: rgba(124,58,237,0.3);
}
.cr-card-play-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--cr-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #fff;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.25s;
}
.cr-game-card:hover .cr-card-play-icon {
    opacity: 1;
    transform: scale(1);
}

.cr-card-badges {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    display: flex;
    gap: 0.4rem;
}
.cr-card-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 900;
    backdrop-filter: blur(8px);
}
.cr-badge-subject {
    background: rgba(124,58,237,0.6);
    color: #fff;
}
.cr-badge-players {
    background: rgba(6,182,212,0.6);
    color: #fff;
}

.cr-card-info {
    padding: 1rem 1.2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.cr-card-name {
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--cr-text);
}
.cr-card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--cr-text-muted);
    font-weight: 700;
}
.cr-card-meta i { margin-right: 0.3rem; }

/* ── Play Page ── */
.cr-play-page {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.cr-play-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1.5rem;
    background: var(--cr-surface);
    border-bottom: 1px solid var(--cr-border);
    flex-shrink: 0;
    min-height: 56px;
}

.cr-play-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.cr-play-title h2 {
    font-size: 1.3rem;
    font-weight: 900;
    margin: 0;
}
.cr-play-title small {
    font-size: 0.8rem;
    color: var(--cr-text-muted);
}

.cr-exit-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--cr-danger);
    border: none;
    color: #fff;
    padding: 0.5rem 1.2rem;
    border-radius: var(--cr-radius-sm);
    font-size: 1rem;
    font-weight: 900;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    min-height: 48px;
    transition: opacity 0.2s;
}
.cr-exit-btn:hover { opacity: 0.85; color: #fff; }

.cr-game-area {
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* ── Player Selector ── */
.cr-player-selector {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
}

.cr-ps-title {
    font-size: 2.5rem;
    font-weight: 900;
    text-align: center;
}

.cr-ps-count-row {
    display: flex;
    gap: 1.5rem;
}
.cr-ps-count-btn {
    width: 120px;
    height: 120px;
    border-radius: var(--cr-radius-lg);
    border: 3px solid var(--cr-border);
    background: var(--cr-surface);
    color: var(--cr-text);
    font-size: 3rem;
    font-weight: 900;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.cr-ps-count-btn:hover { border-color: var(--cr-primary); }
.cr-ps-count-btn.active {
    border-color: var(--cr-primary);
    background: var(--cr-primary);
    box-shadow: 0 0 30px rgba(124,58,237,0.4);
}
.cr-ps-count-label {
    display: block;
    font-size: 0.7rem;
    margin-top: 0.25rem;
    color: var(--cr-text-secondary);
}

.cr-ps-players {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}
.cr-ps-player-card {
    width: 200px;
    padding: 1.5rem;
    border-radius: var(--cr-radius-lg);
    border: 3px solid var(--cr-border);
    background: var(--cr-surface);
    text-align: center;
    transition: all 0.3s;
}
.cr-ps-player-card[data-player="1"] { border-color: var(--cr-p1); background: var(--cr-p1-bg); }
.cr-ps-player-card[data-player="2"] { border-color: var(--cr-p2); background: var(--cr-p2-bg); }
.cr-ps-player-card[data-player="3"] { border-color: var(--cr-p3); background: var(--cr-p3-bg); }
.cr-ps-player-card[data-player="4"] { border-color: var(--cr-p4); background: var(--cr-p4-bg); }

.cr-ps-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 0.75rem;
}
.cr-ps-player-card[data-player="1"] .cr-ps-avatar { background: var(--cr-p1); }
.cr-ps-player-card[data-player="2"] .cr-ps-avatar { background: var(--cr-p2); }
.cr-ps-player-card[data-player="3"] .cr-ps-avatar { background: var(--cr-p3); }
.cr-ps-player-card[data-player="4"] .cr-ps-avatar { background: var(--cr-p4); }

.cr-ps-name-input {
    width: 100%;
    background: rgba(255,255,255,0.1);
    border: 2px solid rgba(255,255,255,0.15);
    border-radius: var(--cr-radius-sm);
    color: #fff;
    padding: 0.5rem;
    font-size: 1.1rem;
    font-weight: 800;
    font-family: inherit;
    text-align: center;
}
.cr-ps-name-input:focus { outline: none; border-color: var(--cr-primary); }

.cr-ps-start-btn {
    padding: 1.2rem 4rem;
    border-radius: var(--cr-radius-lg);
    border: none;
    background: linear-gradient(135deg, var(--cr-primary), var(--cr-secondary));
    color: #fff;
    font-size: 2rem;
    font-weight: 900;
    font-family: inherit;
    cursor: pointer;
    min-height: 80px;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 8px 30px rgba(124,58,237,0.3);
}
.cr-ps-start-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 40px rgba(124,58,237,0.5);
}

/* ── Shared HUD (Score Board) ── */
.cr-hud {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 0.5rem 1rem;
    background: var(--cr-surface);
    border-bottom: 1px solid var(--cr-border);
    flex-shrink: 0;
}
.cr-hud-player {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: var(--cr-radius-sm);
    font-weight: 900;
    font-size: 1.1rem;
    transition: all 0.3s;
}
.cr-hud-player.active { transform: scale(1.1); }
.cr-hud-player[data-p="1"] { background: var(--cr-p1-bg); color: var(--cr-p1); border: 2px solid var(--cr-p1); }
.cr-hud-player[data-p="2"] { background: var(--cr-p2-bg); color: var(--cr-p2); border: 2px solid var(--cr-p2); }
.cr-hud-player[data-p="3"] { background: var(--cr-p3-bg); color: var(--cr-p3); border: 2px solid var(--cr-p3); }
.cr-hud-player[data-p="4"] { background: var(--cr-p4-bg); color: var(--cr-p4); border: 2px solid var(--cr-p4); }

.cr-hud-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}
.cr-hud-player[data-p="1"] .cr-hud-dot { background: var(--cr-p1); }
.cr-hud-player[data-p="2"] .cr-hud-dot { background: var(--cr-p2); }
.cr-hud-player[data-p="3"] .cr-hud-dot { background: var(--cr-p3); }
.cr-hud-player[data-p="4"] .cr-hud-dot { background: var(--cr-p4); }

.cr-hud-score { font-size: 1.3rem; }
.cr-hud-name { font-size: 0.9rem; }

.cr-hud-round {
    font-size: 1rem;
    color: var(--cr-text-muted);
    font-weight: 800;
    padding: 0.3rem 1rem;
    border-radius: var(--cr-radius-sm);
    background: var(--cr-surface-2);
}

/* ── Split Screen Layouts ── */
.cr-split-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    height: 100%;
}
.cr-split-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    width: 100%;
    height: 100%;
}
.cr-split-4 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    width: 100%;
    height: 100%;
}

.cr-split-zone {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
.cr-split-zone[data-p="1"] { border-right: 3px solid var(--cr-p1); border-bottom: 3px solid var(--cr-p1); background: var(--cr-p1-bg); }
.cr-split-zone[data-p="2"] { border-left: 3px solid var(--cr-p2); border-bottom: 3px solid var(--cr-p2); background: var(--cr-p2-bg); }
.cr-split-zone[data-p="3"] { border-right: 3px solid var(--cr-p3); border-top: 3px solid var(--cr-p3); background: var(--cr-p3-bg); }
.cr-split-zone[data-p="4"] { border-left: 3px solid var(--cr-p4); border-top: 3px solid var(--cr-p4); background: var(--cr-p4-bg); }

/* ── Common Game Elements ── */
.cr-question-text {
    font-size: 2.5rem;
    font-weight: 900;
    text-align: center;
    padding: 1rem 2rem;
    line-height: 1.3;
}

.cr-option-btn {
    min-height: 80px;
    min-width: 200px;
    padding: 1rem 2rem;
    border-radius: var(--cr-radius);
    border: 3px solid var(--cr-border);
    background: var(--cr-surface);
    color: var(--cr-text);
    font-size: 1.5rem;
    font-weight: 800;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}
.cr-option-btn:hover { border-color: var(--cr-primary); transform: scale(1.03); }
.cr-option-btn.correct {
    border-color: var(--cr-success);
    background: rgba(16,185,129,0.2);
    box-shadow: 0 0 20px rgba(16,185,129,0.3);
}
.cr-option-btn.wrong {
    border-color: var(--cr-danger);
    background: rgba(239,68,68,0.2);
    box-shadow: 0 0 20px rgba(239,68,68,0.3);
}

.cr-buzzer-btn {
    width: 100%;
    min-height: 160px;
    border: none;
    border-radius: var(--cr-radius-lg);
    font-size: 2.5rem;
    font-weight: 900;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}
.cr-buzzer-btn:active { transform: scale(0.95); }
.cr-buzzer-btn[data-p="1"] { background: var(--cr-p1); color: #fff; box-shadow: var(--cr-p1-glow); }
.cr-buzzer-btn[data-p="2"] { background: var(--cr-p2); color: #fff; box-shadow: var(--cr-p2-glow); }
.cr-buzzer-btn[data-p="3"] { background: var(--cr-p3); color: #fff; box-shadow: var(--cr-p3-glow); }
.cr-buzzer-btn[data-p="4"] { background: var(--cr-p4); color: #fff; box-shadow: var(--cr-p4-glow); }
.cr-buzzer-btn.locked {
    opacity: 0.4;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

/* ── Timer ── */
.cr-timer {
    font-size: 2rem;
    font-weight: 900;
    color: var(--cr-warning);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.cr-timer.danger { color: var(--cr-danger); animation: cr-pulse 0.5s ease-in-out infinite; }

/* ── Results Screen ── */
.cr-results {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
}
.cr-results-title {
    font-size: 3rem;
    font-weight: 900;
    text-align: center;
}
.cr-results-podium {
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    justify-content: center;
}
.cr-podium-item {
    text-align: center;
    padding: 1.5rem 2rem;
    border-radius: var(--cr-radius-lg);
    background: var(--cr-surface);
    border: 3px solid var(--cr-border);
    min-width: 160px;
}
.cr-podium-item.first {
    border-color: #FFD700;
    box-shadow: 0 0 40px rgba(255,215,0,0.3);
    transform: scale(1.1);
}
.cr-podium-item.second { border-color: #C0C0C0; }
.cr-podium-item.third { border-color: #CD7F32; }

.cr-podium-rank {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}
.cr-podium-name {
    font-size: 1.3rem;
    font-weight: 900;
}
.cr-podium-score {
    font-size: 1.1rem;
    color: var(--cr-text-secondary);
    font-weight: 800;
}

.cr-play-again-btn {
    padding: 1rem 3rem;
    border-radius: var(--cr-radius-lg);
    border: none;
    background: linear-gradient(135deg, var(--cr-primary), var(--cr-secondary));
    color: #fff;
    font-size: 1.5rem;
    font-weight: 900;
    font-family: inherit;
    cursor: pointer;
    min-height: 70px;
    transition: transform 0.2s;
}
.cr-play-again-btn:hover { transform: scale(1.05); }

/* ── Hex Grid (Territory) ── */
.cr-hex-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
    padding: 1rem;
}
.cr-hex {
    width: 90px;
    height: 90px;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    background: var(--cr-surface-2);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--cr-text);
    font-family: inherit;
}
.cr-hex:hover { background: var(--cr-primary); transform: scale(1.1); }
.cr-hex.p1 { background: var(--cr-p1); box-shadow: var(--cr-p1-glow); }
.cr-hex.p2 { background: var(--cr-p2); box-shadow: var(--cr-p2-glow); }
.cr-hex.p3 { background: var(--cr-p3); box-shadow: var(--cr-p3-glow); }
.cr-hex.p4 { background: var(--cr-p4); box-shadow: var(--cr-p4-glow); }

/* ── Spinner / Wheel ── */
.cr-wheel-container {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.cr-wheel-pointer {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 18px solid transparent;
    border-right: 18px solid transparent;
    border-top: 30px solid var(--cr-warning);
    z-index: 10;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.5));
}

/* ── On-Screen Keyboard ── */
.cr-keyboard {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 0.5rem;
}
.cr-keyboard-row {
    display: flex;
    gap: 6px;
}
.cr-key {
    min-width: 60px;
    height: 60px;
    border-radius: var(--cr-radius-sm);
    border: 2px solid var(--cr-border);
    background: var(--cr-surface);
    color: var(--cr-text);
    font-size: 1.3rem;
    font-weight: 900;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}
.cr-key:active { background: var(--cr-primary); transform: scale(0.95); }
.cr-key-wide { min-width: 120px; }
.cr-key-space { min-width: 300px; }

/* ── Memory Cards ── */
.cr-memory-grid {
    display: grid;
    gap: 12px;
    padding: 1rem;
    justify-content: center;
}
.cr-memory-card {
    width: 120px;
    height: 120px;
    border-radius: var(--cr-radius);
    background: var(--cr-surface);
    border: 3px solid var(--cr-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    transition: all 0.3s;
    perspective: 600px;
}
.cr-memory-card.flipped {
    background: var(--cr-surface-2);
    border-color: var(--cr-primary);
}
.cr-memory-card.matched {
    opacity: 0.5;
    cursor: default;
}
.cr-memory-card.selected-p1 { border-color: var(--cr-p1); box-shadow: var(--cr-p1-glow); }
.cr-memory-card.selected-p2 { border-color: var(--cr-p2); box-shadow: var(--cr-p2-glow); }
.cr-memory-card.selected-p3 { border-color: var(--cr-p3); box-shadow: var(--cr-p3-glow); }
.cr-memory-card.selected-p4 { border-color: var(--cr-p4); box-shadow: var(--cr-p4-glow); }

/* ── Drawing Canvas ── */
.cr-draw-area {
    display: flex;
    width: 100%;
    height: 100%;
}
.cr-draw-canvas-wrap {
    flex: 0 0 65%;
    display: flex;
    flex-direction: column;
    background: var(--cr-bg);
}
.cr-draw-canvas {
    flex: 1;
    background: #fff;
    border-radius: var(--cr-radius);
    margin: 0.5rem;
    cursor: crosshair;
    touch-action: none;
}
.cr-draw-tools {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
}
.cr-draw-color {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}
.cr-draw-color.active { border-color: #fff; transform: scale(1.2); }
.cr-draw-sidebar {
    flex: 0 0 35%;
    display: flex;
    flex-direction: column;
    padding: 1rem;
    gap: 1rem;
}

/* ── Drag & Drop Sorting ── */
.cr-sort-item {
    padding: 1rem 1.5rem;
    border-radius: var(--cr-radius);
    border: 3px solid var(--cr-border);
    background: var(--cr-surface);
    font-size: 1.3rem;
    font-weight: 800;
    cursor: grab;
    transition: all 0.2s;
    touch-action: none;
}
.cr-sort-item:active { cursor: grabbing; }
.cr-sort-item.dragging {
    opacity: 0.6;
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(0,0,0,0.5);
}

.cr-drop-zone {
    min-height: 120px;
    border: 3px dashed var(--cr-border);
    border-radius: var(--cr-radius);
    padding: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-content: start;
    transition: all 0.2s;
}
.cr-drop-zone.drag-over {
    border-color: var(--cr-primary);
    background: rgba(124,58,237,0.1);
}

/* ── Animations ── */
@keyframes cr-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
@keyframes cr-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}
@keyframes cr-bounce-in {
    0% { transform: scale(0); opacity: 0; }
    60% { transform: scale(1.15); }
    100% { transform: scale(1); opacity: 1; }
}
@keyframes cr-slide-up {
    from { transform: translateY(40px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
@keyframes cr-glow {
    0%, 100% { box-shadow: 0 0 10px rgba(124,58,237,0.3); }
    50% { box-shadow: 0 0 30px rgba(124,58,237,0.6); }
}

.cr-animate-bounce { animation: cr-bounce-in 0.5s ease-out; }
.cr-animate-shake { animation: cr-shake 0.4s ease-in-out; }
.cr-animate-slide-up { animation: cr-slide-up 0.4s ease-out; }
.cr-animate-glow { animation: cr-glow 1.5s ease-in-out infinite; }

/* ── Scrollbar ── */
.cr-game-grid::-webkit-scrollbar { width: 8px; }
.cr-game-grid::-webkit-scrollbar-track { background: var(--cr-bg); }
.cr-game-grid::-webkit-scrollbar-thumb { background: var(--cr-surface-2); border-radius: 4px; }
.cr-game-grid::-webkit-scrollbar-thumb:hover { background: var(--cr-primary); }

/* ── Responsive (smaller smart boards) ── */
@media (max-width: 1400px) {
    .cr-game-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
    .cr-question-text { font-size: 2rem; }
    .cr-buzzer-btn { min-height: 120px; font-size: 2rem; }
    .cr-ps-count-btn { width: 100px; height: 100px; font-size: 2.5rem; }
}