/* HEXAGON - Styles
 * A Super Hexagon-style survival game
 */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&display=swap');

/* ============================================
   CSS Custom Properties (Theme)
   ============================================ */
:root {
    --color-bg: #0a0a0f;
    --color-cyan: #00ffff;
    --color-magenta: #ff00ff;
    --color-white: #ffffff;
    --color-gray: #888888;
    --color-dark-gray: #666666;
    --font-main: 'Orbitron', monospace;
}

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

body {
    background: var(--color-bg);
    overflow: hidden;
    font-family: var(--font-main);
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* ============================================
   Game Canvas
   ============================================ */
#gameCanvas {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* ============================================
   UI Overlay
   ============================================ */
#ui {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

#score {
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: clamp(24px, 5vw, 48px);
    font-weight: 900;
    color: var(--color-white);
    text-shadow: 0 0 20px var(--color-cyan), 0 0 40px var(--color-cyan);
    letter-spacing: 4px;
}

#highScore {
    position: absolute;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    font-size: clamp(12px, 2vw, 16px);
    color: var(--color-magenta);
    text-shadow: 0 0 10px var(--color-magenta);
    letter-spacing: 2px;
}

#combo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(48px, 10vw, 96px);
    font-weight: 900;
    color: var(--color-white);
    text-shadow: 0 0 30px var(--color-cyan), 0 0 60px var(--color-magenta);
    opacity: 0;
    transition: opacity 0.1s;
    pointer-events: none;
}

/* ============================================
   Screens (Start, Game Over, Pause)
   ============================================ */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(10, 10, 15, 0.95);
    pointer-events: all;
    z-index: 20;
}

.screen.hidden {
    display: none;
}

.title {
    font-size: clamp(36px, 10vw, 80px);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-cyan), var(--color-magenta), var(--color-cyan));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient 3s ease infinite;
    text-shadow: none;
    margin-bottom: 20px;
}

@keyframes gradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.subtitle {
    font-size: clamp(12px, 3vw, 18px);
    color: var(--color-gray);
    margin-bottom: 40px;
    letter-spacing: 4px;
    text-transform: uppercase;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    padding: 20px 60px;
    font-family: var(--font-main);
    font-size: clamp(16px, 3vw, 24px);
    font-weight: 700;
    color: var(--color-cyan);
    background: transparent;
    border: 2px solid var(--color-cyan);
    cursor: pointer;
    letter-spacing: 4px;
    transition: all 0.3s ease;
    margin: 10px;
    text-transform: uppercase;
}

.btn:hover {
    background: var(--color-cyan);
    color: var(--color-bg);
    box-shadow: 0 0 30px var(--color-cyan), inset 0 0 30px rgba(0, 255, 255, 0.3);
    transform: scale(1.05);
}

.btn:active {
    transform: scale(0.98);
}

.btn.secondary {
    color: var(--color-magenta);
    border-color: var(--color-magenta);
}

.btn.secondary:hover {
    background: var(--color-magenta);
    color: var(--color-bg);
    box-shadow: 0 0 30px var(--color-magenta), inset 0 0 30px rgba(255, 0, 255, 0.3);
}

.btn-group {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

/* ============================================
   Controls Info
   ============================================ */
.controls {
    margin-top: 40px;
    text-align: center;
    color: var(--color-dark-gray);
    font-size: clamp(10px, 2vw, 14px);
    letter-spacing: 2px;
    line-height: 1.8;
}

.controls span {
    color: var(--color-cyan);
}

/* ============================================
   Game Over Screen
   ============================================ */
.final-score {
    font-size: clamp(48px, 12vw, 120px);
    font-weight: 900;
    color: var(--color-white);
    text-shadow: 0 0 30px var(--color-cyan), 0 0 60px var(--color-magenta);
    margin: 20px 0;
}

.new-record {
    font-size: clamp(16px, 4vw, 24px);
    color: var(--color-magenta);
    text-shadow: 0 0 20px var(--color-magenta);
    animation: pulse 0.5s ease infinite alternate;
    margin-bottom: 20px;
}

@keyframes pulse {
    from { opacity: 0.5; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1.02); }
}

.stats {
    display: flex;
    gap: 40px;
    margin: 20px 0 40px;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: clamp(20px, 5vw, 36px);
    color: var(--color-cyan);
    text-shadow: 0 0 10px var(--color-cyan);
}

.stat-label {
    font-size: clamp(8px, 2vw, 12px);
    color: var(--color-dark-gray);
    letter-spacing: 2px;
    margin-top: 5px;
    text-transform: uppercase;
}

/* ============================================
   Difficulty Selection
   ============================================ */
.difficulty-select {
    display: flex;
    gap: 15px;
    margin: 20px 0;
    flex-wrap: wrap;
    justify-content: center;
}

.difficulty-btn {
    padding: 12px 24px;
    font-family: var(--font-main);
    font-size: clamp(12px, 2vw, 16px);
    font-weight: 700;
    color: var(--color-dark-gray);
    background: transparent;
    border: 1px solid var(--color-dark-gray);
    cursor: pointer;
    letter-spacing: 2px;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

.difficulty-btn:hover {
    color: var(--color-white);
    border-color: var(--color-white);
}

.difficulty-btn.active {
    color: var(--color-cyan);
    border-color: var(--color-cyan);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.difficulty-btn[data-difficulty="easy"].active {
    color: #00ff88;
    border-color: #00ff88;
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.3);
}

.difficulty-btn[data-difficulty="hard"].active {
    color: #ff8800;
    border-color: #ff8800;
    box-shadow: 0 0 15px rgba(255, 136, 0, 0.3);
}

.difficulty-btn[data-difficulty="insane"].active {
    color: #ff0044;
    border-color: #ff0044;
    box-shadow: 0 0 15px rgba(255, 0, 68, 0.3);
}

/* ============================================
   Mobile Controls
   ============================================ */
#mobileControls {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40%;
    display: none;
    pointer-events: all;
    z-index: 15;
}

.mobileBtn {
    position: absolute;
    width: 50%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 48px;
    color: rgba(255, 255, 255, 0.1);
    transition: background 0.1s;
}

.mobileBtn:active {
    background: rgba(0, 255, 255, 0.1);
}

#leftBtn { left: 0; }
#rightBtn { right: 0; }

@media (pointer: coarse) {
    #mobileControls { display: flex; }
}

/* ============================================
   Pause Menu
   ============================================ */
#pauseScreen {
    z-index: 25;
}

#pauseScreen .title {
    font-size: clamp(24px, 6vw, 48px);
}

/* ============================================
   Settings Panel
   ============================================ */
.settings-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 20px 0;
    padding: 20px;
    min-width: 280px;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.setting-label {
    font-size: clamp(12px, 2vw, 16px);
    color: var(--color-gray);
    letter-spacing: 2px;
}

.setting-value {
    font-size: clamp(14px, 2vw, 18px);
    color: var(--color-cyan);
    min-width: 50px;
    text-align: right;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 120px;
    height: 4px;
    background: var(--color-dark-gray);
    border-radius: 2px;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--color-cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-cyan);
    cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--color-cyan);
    border: none;
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-cyan);
    cursor: pointer;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.screen:not(.hidden) {
    animation: fadeIn 0.3s ease;
}

.screen:not(.hidden) .title,
.screen:not(.hidden) .subtitle,
.screen:not(.hidden) .btn {
    animation: slideUp 0.4s ease backwards;
}

.screen:not(.hidden) .title { animation-delay: 0.1s; }
.screen:not(.hidden) .subtitle { animation-delay: 0.2s; }
.screen:not(.hidden) .btn { animation-delay: 0.3s; }

/* ============================================
   Active Effects Display
   ============================================ */
#activeEffects {
    position: absolute;
    top: 120px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 11;
}

.effect-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    border: 1px solid currentColor;
    min-width: 60px;
}

.effect-icon {
    font-size: 20px;
    margin-bottom: 4px;
}

.effect-bar {
    width: 40px;
    height: 3px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

.effect-bar-fill {
    height: 100%;
    background: currentColor;
    transition: width 0.1s linear;
}

.effect-indicator.slowmo { color: #00ff88; }
.effect-indicator.shield { color: #4488ff; }
.effect-indicator.multiplier { color: #ffaa00; }
.effect-indicator.shrink { color: #ff44ff; }
.effect-indicator.magnet { color: #ff6600; }
.effect-indicator.ghost { color: #aaaaff; }
.effect-indicator.frenzy { color: #ff0066; animation: frenzyPulse 0.2s ease infinite alternate; }

@keyframes frenzyPulse {
    from { transform: scale(1); }
    to { transform: scale(1.1); }
}

/* Shield indicator (always visible when active) */
#shieldIndicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 24px;
    color: #4488ff;
    text-shadow: 0 0 15px #4488ff;
    animation: shieldPulse 1s ease-in-out infinite;
}

@keyframes shieldPulse {
    0%, 100% { opacity: 0.7; transform: translateX(-50%) scale(1); }
    50% { opacity: 1; transform: translateX(-50%) scale(1.1); }
}

/* ============================================
   Achievement Notification
   ============================================ */
#achievementPopup {
    position: fixed;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.9), rgba(30, 30, 50, 0.9));
    border: 2px solid var(--color-cyan);
    border-radius: 12px;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    z-index: 1000;
    transform: translateX(120%);
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.3);
}

#achievementPopup.show {
    transform: translateX(0);
}

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

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

.achievement-title {
    font-size: 14px;
    color: var(--color-cyan);
    font-weight: 700;
    letter-spacing: 1px;
}

.achievement-name {
    font-size: 18px;
    color: var(--color-white);
    font-weight: 700;
}

.achievement-desc {
    font-size: 11px;
    color: var(--color-gray);
    margin-top: 2px;
}

/* ============================================
   Leaderboard Panel
   ============================================ */
.leaderboard-panel {
    max-width: 400px;
    width: 90vw;
    max-height: 60vh;
    overflow-y: auto;
    margin: 20px 0;
}

.leaderboard-entry {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    margin-bottom: 8px;
    transition: background 0.2s;
}

.leaderboard-entry:hover {
    background: rgba(255, 255, 255, 0.08);
}

.leaderboard-entry.recent {
    border-left: 3px solid var(--color-cyan);
}

.entry-rank {
    font-size: 24px;
    font-weight: 900;
    width: 50px;
    text-align: center;
    color: var(--color-gray);
}

.leaderboard-entry:nth-child(1) .entry-rank { color: #ffd700; }
.leaderboard-entry:nth-child(2) .entry-rank { color: #c0c0c0; }
.leaderboard-entry:nth-child(3) .entry-rank { color: #cd7f32; }

.entry-score {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-white);
    flex: 1;
}

.entry-details {
    text-align: right;
    font-size: 11px;
    color: var(--color-dark-gray);
    line-height: 1.5;
}

.entry-difficulty {
    text-transform: uppercase;
    letter-spacing: 1px;
}

.entry-difficulty.easy { color: #00ff88; }
.entry-difficulty.normal { color: var(--color-cyan); }
.entry-difficulty.hard { color: #ff8800; }
.entry-difficulty.insane { color: #ff0044; }

/* ============================================
   Achievements Panel
   ============================================ */
.achievements-panel {
    max-width: 500px;
    width: 90vw;
    max-height: 60vh;
    overflow-y: auto;
    margin: 20px 0;
}

.achievement-progress {
    text-align: center;
    margin-bottom: 20px;
    padding: 15px;
    background: rgba(0, 255, 255, 0.1);
    border-radius: 8px;
}

.achievement-progress-text {
    font-size: 14px;
    color: var(--color-cyan);
    margin-bottom: 8px;
}

.achievement-progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.achievement-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-cyan), var(--color-magenta));
    transition: width 0.3s ease;
}

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

.achievement-card {
    padding: 15px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    text-align: center;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.achievement-card:hover {
    background: rgba(255, 255, 255, 0.08);
}

.achievement-card.unlocked {
    border-color: var(--color-cyan);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
}

.achievement-card.locked {
    opacity: 0.5;
    filter: grayscale(1);
}

.achievement-card-icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.achievement-card-name {
    font-size: 12px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 4px;
}

.achievement-card-desc {
    font-size: 10px;
    color: var(--color-gray);
    line-height: 1.3;
}

.achievement-card-points {
    font-size: 10px;
    color: var(--color-cyan);
    margin-top: 6px;
}

/* ============================================
   Settings Screen
   ============================================ */
#settingsScreen {
    z-index: 26;
}

.settings-section {
    width: 100%;
    max-width: 350px;
    margin-bottom: 25px;
}

.settings-section-title {
    font-size: 12px;
    color: var(--color-gray);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.setting-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ============================================
   Tabs (for switching between panels)
   ============================================ */
.tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
}

.tab-btn {
    padding: 10px 20px;
    font-family: var(--font-main);
    font-size: 12px;
    color: var(--color-gray);
    background: transparent;
    border: 1px solid var(--color-dark-gray);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.tab-btn:hover {
    color: var(--color-white);
    border-color: var(--color-white);
}

.tab-btn.active {
    color: var(--color-cyan);
    border-color: var(--color-cyan);
    background: rgba(0, 255, 255, 0.1);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ============================================
   Small Button Variant
   ============================================ */
.btn-small {
    padding: 10px 25px;
    font-size: clamp(10px, 2vw, 14px);
}

.btn-icon {
    padding: 10px 15px;
    font-size: 18px;
    min-width: auto;
}

/* ============================================
   Menu Navigation (Start Screen)
   ============================================ */
.menu-nav {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.menu-nav-btn {
    padding: 12px 20px;
    font-family: var(--font-main);
    font-size: 11px;
    color: var(--color-gray);
    background: transparent;
    border: 1px solid var(--color-dark-gray);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.menu-nav-btn:hover {
    color: var(--color-cyan);
    border-color: var(--color-cyan);
}

.menu-nav-icon {
    font-size: 20px;
}

/* ============================================
   Responsive Adjustments
   ============================================ */
/* ============================================
   Streak Display
   ============================================ */
#streakDisplay {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

#streakDisplay.active {
    opacity: 1;
}

.streak-count {
    font-size: clamp(32px, 8vw, 64px);
    font-weight: 900;
    color: var(--color-cyan);
    text-shadow: 0 0 20px var(--color-cyan);
}

.streak-name {
    font-size: clamp(12px, 3vw, 18px);
    color: var(--color-magenta);
    text-transform: uppercase;
    letter-spacing: 4px;
    animation: pulse 0.5s ease infinite alternate;
}

.streak-multiplier {
    font-size: clamp(16px, 4vw, 24px);
    color: #ffaa00;
    text-shadow: 0 0 15px #ffaa00;
}

/* ============================================
   Zone Indicator
   ============================================ */
#zoneIndicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(24px, 6vw, 48px);
    font-weight: 900;
    color: transparent;
    background: linear-gradient(90deg, #ff00ff, #00ffff, #00ff88, #ffaa00, #ff00ff);
    background-size: 400% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    text-shadow: none;
    letter-spacing: 8px;
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.5);
    transition: opacity 0.5s ease, transform 0.5s ease;
    pointer-events: none;
    animation: zoneGradient 2s linear infinite;
}

#zoneIndicator.active {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

@keyframes zoneGradient {
    0% { background-position: 0% 50%; }
    100% { background-position: 400% 50%; }
}

/* ============================================
   Multiplier Display
   ============================================ */
#multiplierDisplay {
    position: absolute;
    top: 50%;
    right: 30px;
    transform: translateY(-50%);
    font-size: clamp(36px, 8vw, 72px);
    font-weight: 900;
    color: #ffaa00;
    text-shadow: 0 0 30px #ffaa00;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

#multiplierDisplay.active {
    opacity: 0.8;
}

/* ============================================
   Streak Lost Notification
   ============================================ */
#streakLost {
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

#streakLost.show {
    opacity: 1;
    animation: streakLostPulse 0.5s ease;
}

@keyframes streakLostPulse {
    0% { transform: translate(-50%, -50%) scale(1.5); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

.streak-lost-text {
    font-size: clamp(16px, 4vw, 24px);
    color: #ff4444;
    text-shadow: 0 0 15px #ff4444;
    letter-spacing: 4px;
}

.streak-lost-count {
    font-size: clamp(24px, 6vw, 48px);
    font-weight: 900;
    color: #ff4444;
    text-shadow: 0 0 20px #ff4444;
}

/* ============================================
   Combo Multiplier
   ============================================ */
.combo-multiplier {
    font-size: 0.6em;
    color: #ffaa00;
    margin-left: 10px;
}

/* ============================================
   Zone Badge (Game Over)
   ============================================ */
.zone-badge {
    padding: 10px 25px;
    background: linear-gradient(90deg, rgba(255, 0, 255, 0.2), rgba(0, 255, 255, 0.2));
    border: 2px solid var(--color-magenta);
    border-radius: 25px;
    font-size: clamp(12px, 3vw, 16px);
    color: var(--color-cyan);
    letter-spacing: 3px;
    margin-bottom: 20px;
    animation: zoneBadgePulse 1s ease infinite alternate;
}

@keyframes zoneBadgePulse {
    from { box-shadow: 0 0 10px rgba(255, 0, 255, 0.3); }
    to { box-shadow: 0 0 25px rgba(0, 255, 255, 0.5); }
}

/* ============================================
   Theme Grid
   ============================================ */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    max-width: 400px;
    margin: 10px auto;
}

.theme-card {
    padding: 15px 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.theme-card:hover {
    background: rgba(255, 255, 255, 0.08);
}

.theme-card.active {
    border-color: var(--color-cyan);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.theme-card.locked {
    opacity: 0.4;
    cursor: not-allowed;
}

.theme-card-preview {
    width: 40px;
    height: 40px;
    margin: 0 auto 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-card-preview::before {
    content: '';
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 10px currentColor;
}

.theme-card.locked .theme-card-preview::before {
    content: '🔒';
    background: none;
    box-shadow: none;
    font-size: 20px;
}

.theme-card-name {
    font-size: 10px;
    color: var(--color-white);
    letter-spacing: 1px;
}

.theme-card-unlock {
    font-size: 8px;
    color: var(--color-gray);
    margin-top: 4px;
}

/* ============================================
   Game Mode Selection
   ============================================ */
.mode-select {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 600px;
}

.mode-btn {
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--color-dark-gray);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 100px;
}

.mode-btn:hover {
    border-color: var(--color-white);
    background: rgba(255, 255, 255, 0.08);
}

.mode-btn.active {
    border-color: var(--color-cyan);
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.2);
}

.mode-icon {
    display: block;
    font-size: 28px;
    margin-bottom: 8px;
}

.mode-name {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 1px;
}

.mode-desc {
    display: block;
    font-size: 9px;
    color: var(--color-gray);
    margin-top: 4px;
}

.mode-btn.active .mode-name {
    color: var(--color-cyan);
}

.mode-btn[data-mode="hardcore"] {
    border-color: #ff4444;
}

.mode-btn[data-mode="hardcore"].active {
    border-color: #ff4444;
    background: rgba(255, 68, 68, 0.1);
    box-shadow: 0 0 20px rgba(255, 68, 68, 0.2);
}

.mode-btn[data-mode="hardcore"].active .mode-name {
    color: #ff4444;
}

.mode-btn[data-mode="zen"].active {
    border-color: #00ff88;
    background: rgba(0, 255, 136, 0.1);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.2);
}

.mode-btn[data-mode="zen"].active .mode-name {
    color: #00ff88;
}

/* ============================================
   Time Attack Options
   ============================================ */
.time-options {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 10px 0 20px;
    padding: 10px 20px;
    background: rgba(0, 255, 255, 0.05);
    border-radius: 8px;
}

.time-options.hidden {
    display: none;
}

.time-label {
    font-size: 12px;
    color: var(--color-gray);
    letter-spacing: 1px;
}

.time-btn {
    padding: 8px 16px;
    font-family: var(--font-main);
    font-size: 12px;
    color: var(--color-gray);
    background: transparent;
    border: 1px solid var(--color-dark-gray);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.time-btn:hover {
    color: var(--color-white);
    border-color: var(--color-white);
}

.time-btn.active {
    color: var(--color-cyan);
    border-color: var(--color-cyan);
    background: rgba(0, 255, 255, 0.1);
}

/* ============================================
   Mode Timer Display
   ============================================ */
#modeTimer {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: clamp(20px, 4vw, 36px);
    font-weight: 900;
    color: var(--color-white);
    text-shadow: 0 0 15px var(--color-cyan);
    letter-spacing: 2px;
}

#modeTimer.hidden {
    display: none;
}

#modeTimer.warning {
    color: #ffaa00;
    text-shadow: 0 0 15px #ffaa00;
    animation: timerWarning 0.5s ease infinite alternate;
}

#modeTimer.critical {
    color: #ff4444;
    text-shadow: 0 0 15px #ff4444;
    animation: timerWarning 0.25s ease infinite alternate;
}

@keyframes timerWarning {
    from { transform: scale(1); }
    to { transform: scale(1.1); }
}

/* ============================================
   Mode Goal Display
   ============================================ */
#modeGoal {
    position: absolute;
    top: 30px;
    left: 30px;
    font-size: clamp(12px, 2.5vw, 18px);
    color: var(--color-magenta);
    text-shadow: 0 0 10px var(--color-magenta);
    letter-spacing: 2px;
}

#modeGoal.hidden {
    display: none;
}

#modeGoal .goal-progress {
    display: block;
    font-size: clamp(16px, 3vw, 24px);
    color: var(--color-cyan);
    margin-top: 5px;
}

/* ============================================
   Victory Screen
   ============================================ */
#victoryScreen {
    background: radial-gradient(ellipse at center, rgba(0, 255, 255, 0.1) 0%, rgba(10, 10, 15, 0.98) 70%);
}

.victory-title {
    font-size: clamp(48px, 12vw, 100px);
    font-weight: 900;
    background: linear-gradient(135deg, #00ffff, #00ff88, #ffaa00, #00ffff);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: victoryGradient 2s ease infinite;
    margin-bottom: 10px;
}

@keyframes victoryGradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.victory-mode {
    font-size: clamp(14px, 3vw, 20px);
    color: var(--color-magenta);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

#victoryScreen .final-score {
    text-shadow: 0 0 30px #00ff88, 0 0 60px #00ffff;
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 600px) {
    .stats {
        gap: 15px;
        flex-wrap: wrap;
        max-width: 280px;
    }

    .stat {
        min-width: 60px;
    }

    .achievements-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .menu-nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    #achievementPopup {
        right: 10px;
        left: 10px;
        transform: translateY(-120%);
    }

    #achievementPopup.show {
        transform: translateY(0);
    }

    #streakDisplay {
        bottom: 80px;
    }

    #multiplierDisplay {
        right: 15px;
        font-size: clamp(24px, 6vw, 48px);
    }

    .theme-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .mode-select {
        gap: 8px;
    }

    .mode-btn {
        padding: 12px 15px;
        min-width: 80px;
    }

    .mode-icon {
        font-size: 22px;
    }

    .mode-name {
        font-size: 10px;
    }

    #modeTimer {
        right: 15px;
    }

    #modeGoal {
        left: 15px;
    }
}