@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@500;700&family=Scheherazade+New:wght@700&display=swap');

:root {
    --bg-dark: #0b0b1a;
    --sand-gold: #C9A86C;
    --accent: #FFF8E0;
    --text: #ffffff;
}

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

body {
    font-family: 'Scheherazade New', 'Rajdhani', 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

.game-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

#ui-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

#pause-btn {
    position: absolute;
    top: 15px;
    left: 20px;
    padding: 8px 18px;
    font-size: 16px;
    font-weight: 700;
    border-radius: 10px;
    border: 1px solid rgba(255, 248, 224, 0.4);
    background: rgba(20, 16, 32, 0.7);
    color: var(--accent);
    cursor: pointer;
    pointer-events: auto;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    transition: background 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
}

#pause-btn:hover {
    background: rgba(32, 26, 50, 0.95);
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.6);
}

#pause-btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

#score-display {
    position: absolute;
    top: 20px;
    right: 25px;
    color: var(--accent);
    font-size: clamp(18px, 4vw, 28px);
    font-weight: 700;
    text-shadow: 
        0 2px 8px rgba(0, 0, 0, 0.8),
        0 0 20px rgba(255, 248, 224, 0.3);
    letter-spacing: 2px;
}

/* (volume button removed) */

#pause-btn {
    position: absolute;
    top: 15px;
    left: 20px;
    padding: 8px 18px;
    font-size: 14px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 248, 224, 0.25);
    color: var(--accent);
    cursor: pointer;
    pointer-events: auto;
    backdrop-filter: blur(6px);
    transition: transform 0.15s ease, background 0.15s ease;
}

#pause-btn:hover {
    background: rgba(0, 0, 0, 0.5);
    transform: translateY(-1px);
}

#pause-btn:active {
    transform: translateY(1px);
}

/* Overlays */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 11, 26, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text);
    pointer-events: auto;
    backdrop-filter: blur(8px);
    z-index: 100;
}

#start-screen {
    z-index: 200;
}

#game-over-screen {
    z-index: 150;
}

.hidden {
    display: none !important;
    visibility: hidden !important;
    pointer-events: none !important;
}

#main-title {
    font-size: clamp(32px, 10vw, 64px);
    font-weight: 700;
    font-family: 'Scheherazade New', 'Rajdhani', serif;
    color: var(--sand-gold);
    margin-bottom: 15px;
    text-shadow: 
        0 4px 20px rgba(201, 168, 108, 0.5),
        0 2px 4px rgba(0, 0, 0, 0.8);
    letter-spacing: 4px;
    animation: title-glow 3s ease-in-out infinite alternate;
    overflow: hidden;
    white-space: nowrap;
}

@keyframes title-glow {
    from { text-shadow: 0 4px 20px rgba(201, 168, 108, 0.4), 0 2px 4px rgba(0, 0, 0, 0.8); }
    to { text-shadow: 0 4px 30px rgba(201, 168, 108, 0.7), 0 2px 4px rgba(0, 0, 0, 0.8); }
}

/* Animation lettre par lettre (chute de sable) */
.title-letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(-40px);
    filter: blur(6px);
    animation: sand-fall 0.9s ease-out forwards;
}

@keyframes sand-fall {
    0% {
        opacity: 0;
        transform: translateY(-40px);
        filter: blur(6px);
    }
    60% {
        opacity: 1;
        transform: translateY(4px);
        filter: blur(1px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

.overlay p {
    font-size: clamp(12px, 3vw, 18px);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 30px;
    letter-spacing: 1px;
    font-weight: 500;
}

h2 {
    font-size: clamp(28px, 8vw, 48px);
    font-weight: 700;
    color: #E74C3C;
    margin-bottom: 10px;
    text-shadow: 0 4px 15px rgba(231, 76, 60, 0.5);
}

/* Boutons */
button {
    font-family: 'Scheherazade New', 'Rajdhani', sans-serif;
    padding: 14px 45px;
    font-size: clamp(14px, 4vw, 20px);
    font-weight: 700;
    background: linear-gradient(180deg, var(--sand-gold) 0%, #A88550 100%);
    border: none;
    border-radius: 8px;
    color: #1a1a1a;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 
        0 4px 0 #8A6940,
        0 6px 20px rgba(0, 0, 0, 0.4);
    letter-spacing: 2px;
    text-transform: uppercase;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 #8A6940,
        0 10px 30px rgba(201, 168, 108, 0.4);
}

button:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 #8A6940,
        0 4px 15px rgba(0, 0, 0, 0.4);
}

/* Leaderboard */
.leaderboard-container {
    margin-top: 25px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(201, 168, 108, 0.3);
    padding: 20px 25px;
    border-radius: 12px;
    width: min(300px, 85vw);
    max-height: 180px;
    overflow-y: auto;
    backdrop-filter: blur(10px);
}

.leaderboard-container h3 {
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 700;
    text-align: center;
    color: var(--sand-gold);
    border-bottom: 1px solid rgba(201, 168, 108, 0.3);
    padding-bottom: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

#leaderboard-list {
    list-style: none;
    padding: 0;
}

#leaderboard-list li {
    display: flex;
    justify-content: space-between;
    padding: 6px 5px;
    font-size: 14px;
    font-weight: 500;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.75);
}

#leaderboard-list li:first-child {
    color: #FFD700;
    font-weight: 700;
}

#leaderboard-list li:nth-child(2) {
    color: #C0C0C0;
}

#leaderboard-list li:nth-child(3) {
    color: #CD7F32;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: rgba(201, 168, 108, 0.5);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(201, 168, 108, 0.8);
}

/* Mobile */
@media (max-width: 600px) {
    button {
        padding: 12px 35px;
    }
    
    .leaderboard-container {
        padding: 15px 18px;
    }
}