/* ========== CSS Variables ========== */
:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-card: #1e1e36;
    --text-primary: #e0e0e0;
    --text-secondary: #999;
    --text-muted: #555;
    --accent: #6c5ce7;
    --accent-light: #a29bfe;
    --accent-glow: rgba(108,92,231,0.25);
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #e17055;
    --info: #0984e3;
    --border: #2a2a45;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --transition: 0.25s ease;
}

body.light {
    --bg-primary: #f0f2f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8eaf0;
    --bg-card: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #636e72;
    --text-muted: #b2bec3;
    --accent-glow: rgba(108,92,231,0.12);
    --border: #ddd;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

/* ========== Reset & Base ========== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    transition: background var(--transition), color var(--transition);
    line-height: 1.6;
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    padding-bottom: env(safe-area-inset-bottom);
}

a { color: var(--accent-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ========== Top Bar ========== */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    padding-top: max(10px, env(safe-area-inset-top));
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background var(--transition);
}

.top-bar .logo {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 6px;
}

.top-bar .logo a { color: var(--accent); text-decoration: none; }

.top-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

.icon-btn, .lang-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition);
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.icon-btn:hover, .lang-btn:hover { border-color: var(--accent); }
.lang-btn { font-weight: 600; color: var(--accent); }

/* ========== Main ========== */
main {
    flex: 1;
    max-width: 720px;
    margin: 0 auto;
    padding: 24px 16px;
    width: 100%;
}

main.hub-main { max-width: 960px; }

/* ========== Game Header ========== */
.game-header {
    text-align: center;
    margin-bottom: 24px;
}

.game-header h1 {
    font-size: 2rem;
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
}

.game-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ========== Stats Bar ========== */
.stats-bar {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 20px;
    padding: 14px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.stat-item { text-align: center; }
.stat-value { display: block; font-size: 1.3rem; font-weight: 700; color: var(--accent); }
.stat-label { font-size: 0.72rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }

/* ========== Game Area ========== */
.game-area {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 20px;
    text-align: center;
    min-height: 260px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: border-color var(--transition);
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.game-area.aim-area { min-height: 400px; cursor: crosshair; overflow: hidden; }
.game-area.reaction-area {
    cursor: pointer;
    min-height: 320px;
    transition: border-color var(--transition), background-color var(--transition), color var(--transition);
}

.game-area.reaction-area.waiting,
.game-area.reaction-area.failed {
    background: #c0392b;
    border-color: #c0392b;
    color: #fff;
}

.game-area.reaction-area.active {
    background: #27ae60;
    border-color: #27ae60;
    color: #fff;
}

.game-area.reaction-area.finished {
    background: var(--bg-card);
    border-color: var(--accent);
    color: var(--text-primary);
}

.aim-target {
    position: absolute;
    border-radius: 50%;
    background: var(--accent-light);
    cursor: crosshair;
    transition: transform 0.1s;
    box-shadow: 0 0 20px rgba(108,92,231,0.4);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.touch-key {
    width: 100px;
    height: 100px;
    font-size: 2rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.mobile-arrow-btns {
    display: none;
    margin-top: 16px;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.touch-device .mobile-arrow-btns { display: flex; }

.mobile-arrow-btns .btn {
    font-size: 1.5rem;
    min-width: 64px;
    min-height: 64px;
    padding: 8px;
}

.game-area.active { border-color: var(--success); }
.game-area.waiting { border-color: var(--warning); }
.game-area.failed { border-color: var(--danger); }
.game-area.finished { border-color: var(--accent); }
.game-area.waiting-for-click { border-color: var(--text-muted); opacity: 0.7; cursor: not-allowed; }

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover { background: #5a4bd1; transform: translateY(-1px); }

.btn-secondary {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
}
.btn-secondary:hover { background: var(--accent); color: #fff; }

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-sm { padding: 6px 14px; font-size: 0.85rem; }

.btn-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 16px;
    flex-wrap: wrap;
}

/* ========== Duration / Mode Selector ========== */
.mode-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.mode-selector > span { color: var(--text-secondary); font-size: 0.85rem; }

.mode-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition);
    min-height: 44px;
    min-width: 44px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}
.mode-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.mode-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ========== Result Area ========== */
.result-area {
    text-align: center;
    margin-top: 24px;
    padding: 24px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    animation: slideUp 0.35s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-area h2 { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 12px; }

.result-big {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.1;
}

.result-unit { font-size: 1.2rem; color: var(--accent-light); margin-left: 4px; }

.result-detail { color: var(--text-secondary); margin-top: 8px; }
.result-detail strong { color: var(--text-primary); }

.result-rank { font-size: 1.15rem; margin-top: 10px; font-weight: 600; }

.new-record {
    margin-top: 10px;
    font-size: 1rem;
    color: var(--warning);
    font-weight: 600;
    animation: bounce 0.5s ease;
}

@keyframes bounce {
    0%,100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

/* ========== Progress Bar ========== */
.progress-bar-container {
    margin-top: 14px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    height: 10px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    border-radius: 10px;
    background: linear-gradient(90deg, #e17055, #fdcb6e, #00b894, #0984e3, #6c5ce7);
    width: 0%;
    transition: width 0.6s ease-out;
}

/* ========== Timer Ring ========== */
.timer-ring-wrap {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto 16px;
}

.timer-ring { width: 100%; height: 100%; transform: rotate(-90deg); }
.timer-ring-bg { fill: none; stroke: var(--border); stroke-width: 5; }
.timer-ring-progress { fill: none; stroke: var(--accent); stroke-width: 5; stroke-linecap: round; stroke-dasharray: 282.743; stroke-dashoffset: 0; transition: stroke-dashoffset 0.15s linear; }

.timer-ring-text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
}

.timer-ring-text small { font-size: 0.9rem; color: var(--text-secondary); }

/* ========== Grid (for memory games) ========== */
.game-grid {
    display: grid;
    gap: 8px;
    margin: 16px auto;
    max-width: 400px;
    width: 100%;
}

.game-canvas {
    max-width: 100%;
    height: auto;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    display: block;
    margin: 0 auto;
    touch-action: manipulation;
}

.grid-cell {
    aspect-ratio: 1;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    min-height: 44px;
}

.grid-cell:hover { border-color: var(--accent); }
.grid-cell.highlight { background: var(--accent); border-color: var(--accent); color: #fff; }
.grid-cell.selected { background: rgba(108,92,231,0.25); border-color: var(--accent); }
.grid-cell.correct { background: var(--success); border-color: var(--success); color: #fff; }
.grid-cell.wrong { background: var(--danger); border-color: var(--danger); color: #fff; }
.grid-cell.revealed { background: var(--accent-light); border-color: var(--accent-light); color: #fff; }
.grid-cell.hidden { cursor: default; }

/* ========== Input ========== */
.game-input {
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-size: 1.1rem;
    color: var(--text-primary);
    outline: none;
    width: 100%;
    max-width: 360px;
    text-align: center;
    transition: border-color var(--transition);
}
.game-input:focus { border-color: var(--accent); }

/* ========== Text Display (typing test) ========== */
.text-display {
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    padding: 20px;
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 16px;
    min-height: 100px;
    letter-spacing: 0.3px;
}

.text-display .correct { color: var(--success); }
.text-display .wrong { color: var(--danger); text-decoration: underline; }
.text-display .current { background: var(--accent-glow); border-radius: 2px; }
.text-display .pending { color: var(--text-muted); }

/* ========== Info Section ========== */
.info-section { margin-top: 36px; }
.info-section h2 { font-size: 1.25rem; color: var(--accent-light); margin-top: 24px; margin-bottom: 10px; }
.info-section p { color: var(--text-secondary); line-height: 1.7; margin-bottom: 8px; }
.info-section ul { list-style: none; padding: 0; }
.info-section li { color: var(--text-secondary); line-height: 1.7; padding: 4px 0 4px 18px; position: relative; }
.info-section li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); }

/* ========== Hub Cards ========== */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
    margin-top: 24px;
}

.game-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 16px;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
    display: block;
    text-decoration: none;
    color: var(--text-primary);
}

.game-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    text-decoration: none;
}

.game-card .card-icon { font-size: 2.2rem; margin-bottom: 8px; display: block; }
.game-card .card-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.game-card .card-desc { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.4; }
.game-card .card-badge {
    display: inline-block;
    margin-top: 8px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-light);
    background: var(--accent-glow);
    padding: 2px 8px;
    border-radius: 10px;
}

/* ========== Hub Enhancements ========== */
.hub-subtitle2 {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 4px;
}

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

.hub-stat {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 12px;
    text-align: center;
}

.hub-stat-icon { font-size: 1.4rem; display: block; margin-bottom: 4px; }
.hub-stat-value { display: block; font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.hub-stat-label { font-size: 0.72rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.4px; }

.daily-challenge-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: linear-gradient(135deg, rgba(108,92,231,0.15), rgba(162,155,254,0.08));
    border: 2px solid var(--accent);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition);
}

.daily-challenge-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    text-decoration: none;
}

.daily-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-light);
    margin-bottom: 6px;
}

.daily-icon { font-size: 2rem; margin-right: 8px; vertical-align: middle; }
.daily-title { font-size: 1.2rem; font-weight: 700; }
.daily-desc { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-top: 2px; }
.daily-best { display: block; font-size: 0.8rem; color: var(--success); margin-top: 6px; font-weight: 600; }

.daily-play-btn {
    white-space: nowrap;
    background: var(--accent);
    color: #fff;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
}

.hub-toolbar {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 180px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition);
}

.search-input:focus { border-color: var(--accent); }

.category-tabs {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.category-tab {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.82rem;
    transition: all var(--transition);
}

.category-tab:hover { border-color: var(--accent); color: var(--text-primary); }
.category-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.section-title {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.recent-section { margin-bottom: 20px; }

.recent-list {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.recent-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 0.82rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition);
}

.recent-chip:hover {
    border-color: var(--accent);
    text-decoration: none;
    transform: translateY(-1px);
}

/* ========== Result Enhancements ========== */
.percentile-line { font-size: 1rem; margin-top: 8px; }

.next-game-link {
    display: block;
    text-align: center;
    margin-top: 16px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--accent-light);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all var(--transition);
}
.next-game-link:hover { background: var(--accent-glow); text-decoration: none; }

/* ========== Achievement Toast ========== */
.achievement-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--bg-card);
    border: 2px solid var(--warning);
    border-radius: var(--radius);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow);
    z-index: 300;
    transform: translateY(120%);
    opacity: 0;
    transition: all 0.4s ease;
    max-width: 280px;
}
.achievement-toast.show { transform: translateY(0); opacity: 1; }
.toast-icon { font-size: 2rem; }
.toast-text { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.4; }
.toast-text strong { color: var(--warning); }

/* ========== Brain Score Page ========== */
.brain-score-big {
    font-size: 5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #6c5ce7, #00b894);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}
.brain-score-label { color: var(--text-secondary); font-size: 1rem; margin-top: 4px; }

.brain-breakdown {
    display: grid;
    gap: 10px;
    margin-top: 24px;
}

.brain-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
}

.brain-item-icon { font-size: 1.4rem; }
.brain-item-name { flex: 1; font-size: 0.9rem; font-weight: 600; }
.brain-item-bar-wrap {
    flex: 2;
    background: var(--bg-tertiary);
    border-radius: 6px;
    height: 8px;
    overflow: hidden;
}
.brain-item-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    border-radius: 6px;
    transition: width 0.6s ease;
}
.brain-item-score { font-weight: 700; color: var(--accent); min-width: 36px; text-align: right; font-size: 0.9rem; }
.brain-item-missing { color: var(--text-muted); font-size: 0.85rem; font-style: italic; }

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
    margin-top: 16px;
}

.achievement-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 10px;
    text-align: center;
    opacity: 0.4;
    transition: all var(--transition);
}
.achievement-card.unlocked {
    opacity: 1;
    border-color: var(--warning);
    box-shadow: 0 0 12px rgba(253,203,110,0.15);
}
.achievement-card .ach-icon { font-size: 1.8rem; display: block; margin-bottom: 6px; }
.achievement-card .ach-name { font-size: 0.75rem; font-weight: 600; color: var(--text-secondary); }

.hub-brain-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: linear-gradient(135deg, rgba(0,184,148,0.12), rgba(108,92,231,0.08));
    border: 1px solid var(--success);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 16px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition);
}
.hub-brain-link:hover { transform: translateY(-2px); box-shadow: var(--shadow); text-decoration: none; }
.hub-brain-score { font-size: 2rem; font-weight: 800; color: var(--success); }
.hub-brain-text { font-size: 0.85rem; color: var(--text-secondary); }

/* ========== Desktop-preferred notice (mobile) ========== */
.desktop-notice {
    display: flex;
    gap: 14px;
    background: linear-gradient(135deg, rgba(253,203,110,0.12), rgba(225,112,85,0.08));
    border: 2px solid var(--warning);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 20px;
}
.desktop-notice-icon { font-size: 2rem; flex-shrink: 0; }
.desktop-notice-body { flex: 1; }
.desktop-notice-body strong { display: block; color: var(--warning); margin-bottom: 6px; font-size: 1rem; }
.desktop-notice-body p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.5; margin-bottom: 12px; }
.desktop-notice-actions { display: flex; gap: 8px; flex-wrap: wrap; }

main.desktop-notice-active .game-area,
main.desktop-notice-active .game-grid,
main.desktop-notice-active .game-input,
main.desktop-notice-active .text-display,
main.desktop-notice-active .game-canvas,
main.desktop-notice-active .mode-selector,
main.desktop-notice-active .timer-ring-wrap {
    pointer-events: none;
    opacity: 0.45;
    filter: grayscale(0.3);
}

.card-desktop-badge {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--warning);
    background: rgba(253,203,110,0.15);
    padding: 2px 6px;
    border-radius: 8px;
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.touch-device .game-card.desktop-preferred-card { opacity: 0.85; }

/* ========== Overlay ========== */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.overlay-content {
    text-align: center;
    color: #fff;
}

.overlay-content .big-number {
    font-size: 7rem;
    font-weight: 800;
    color: var(--accent);
    animation: countPulse 0.45s ease-out;
}

@keyframes countPulse {
    0% { transform: scale(1.8); opacity: 0; }
    60% { opacity: 1; }
    100% { transform: scale(1); }
}

/* ========== History ========== */
.history-section {
    margin-top: 24px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.history-section h2 { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 10px; }

.history-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 180px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 10px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 0.85rem;
}

.history-item .h-score { font-weight: 700; color: var(--accent); }
.history-item .h-detail { color: var(--text-secondary); }
.history-item .h-time { color: var(--text-muted); font-size: 0.75rem; }

.clear-btn {
    margin-top: 10px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all var(--transition);
}
.clear-btn:hover { border-color: var(--danger); color: var(--danger); }

/* ========== Ripple ========== */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: var(--accent-glow);
    transform: scale(0);
    animation: rippleAnim 0.45s ease-out;
    pointer-events: none;
}

@keyframes rippleAnim { to { transform: scale(4); opacity: 0; } }

/* ========== Footer ========== */
footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ========== Responsive ========== */
@media (max-width: 768px) {
    main { padding: 20px 14px; }
    main.hub-main { max-width: 100%; }
    .brain-item { flex-wrap: wrap; }
    .brain-item-bar-wrap { flex: 1 1 100%; order: 3; }
    .brain-item-score { order: 2; }
    .achievements-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 520px) {
    .top-bar { padding: 8px 12px; padding-top: max(8px, env(safe-area-inset-top)); }
    .top-bar .logo { font-size: 1rem; }
    main { padding: 16px 12px; }
    .game-header h1 { font-size: 1.5rem; }
    .game-header p { font-size: 0.9rem; }
    .game-area { padding: 20px 12px; min-height: 200px; }
    .game-area.aim-area { min-height: 260px; }
    .game-area.reaction-area { min-height: 240px; }
    .result-big { font-size: 2.8rem; }
    .brain-score-big { font-size: 3.5rem; }
    .stats-bar { gap: 10px; padding: 10px 8px; flex-wrap: wrap; }
    .stat-item { flex: 1 1 28%; min-width: 70px; }
    .stat-value { font-size: 1.1rem; }
    .stat-label { font-size: 0.65rem; }
    .games-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .game-card { padding: 14px 10px; }
    .game-card .card-icon { font-size: 1.8rem; }
    .game-card .card-title { font-size: 0.85rem; }
    .game-card .card-desc { font-size: 0.72rem; }
    .btn-group { flex-direction: column; }
    .btn-group .btn { width: 100%; min-height: 48px; }
    .btn { min-height: 44px; }
    .timer-ring-wrap { width: 80px; height: 80px; }
    .timer-ring-text { font-size: 1.4rem; }
    .hub-stats-panel { grid-template-columns: 1fr; gap: 8px; }
    .hub-brain-link { flex-direction: column; text-align: center; padding: 14px 16px; }
    .daily-challenge-card { flex-direction: column; text-align: center; padding: 16px; }
    .daily-play-btn { width: 100%; text-align: center; padding: 12px; }
    .hub-toolbar { flex-direction: column; }
    .search-input { min-height: 48px; font-size: 16px; }
    .category-tab { min-height: 40px; padding: 8px 14px; }
    .mode-selector { gap: 4px; }
    .mode-btn { padding: 8px 12px; font-size: 0.8rem; }
    .game-grid { max-width: 100%; gap: 6px; }
    .grid-cell { font-size: 1.1rem; }
    .text-display { font-size: 1rem; padding: 14px; line-height: 1.7; }
    .game-input { font-size: 16px; min-height: 48px; }
    .info-section h2 { font-size: 1.1rem; }
    .info-section p { font-size: 0.9rem; }
    .achievement-toast {
        left: 12px;
        right: 12px;
        bottom: max(12px, env(safe-area-inset-bottom));
        max-width: none;
    }
    .achievements-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .achievement-card { padding: 10px 6px; }
    .achievement-card .ach-icon { font-size: 1.5rem; }
    .touch-key { width: 88px; height: 88px; font-size: 1.8rem; }
    .percentile-line { font-size: 0.9rem; }
    .next-game-link { font-size: 0.85rem; padding: 14px; }
    .desktop-notice { flex-direction: column; text-align: center; }
    .desktop-notice-actions { flex-direction: column; }
    .desktop-notice-actions .btn { width: 100%; min-height: 44px; }
    footer { padding: 16px 12px; font-size: 0.75rem; }
}

@media (max-width: 360px) {
    .games-grid { grid-template-columns: 1fr; }
    .stat-item { flex: 1 1 45%; }
    .achievements-grid { grid-template-columns: repeat(2, 1fr); }
}