/* Modern Tetris - Stunning Dark Theme with Neon Accents */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;900&family=Orbitron:wght@700;900&display=swap');

:root {
    /* Neon Color Palette */
    --neon-cyan: #00f0ff;
    --neon-pink: #ff00f7;
    --neon-purple: #b026ff;
    --neon-green: #39ff14;
    --neon-yellow: #ffea00;
    --neon-orange: #ff6600;
    --neon-red: #ff0055;
    
    /* Dark Theme */
    --bg-dark: #0a0a0f;
    --bg-darker: #050508;
    --bg-card: rgba(20, 20, 30, 0.6);
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Game Settings */
    --block-size: 30px;
    --board-width: 10;
    --board-height: 20;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0a0a0f 0%, #1a0a2e 50%, #0a0a0f 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 240, 255, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 50%, rgba(255, 0, 247, 0.1) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
}

.container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1400px;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

header h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 4rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink), var(--neon-purple));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
    letter-spacing: 0.3rem;
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.6)); }
    50% { filter: drop-shadow(0 0 25px rgba(255, 0, 247, 0.8)); }
}

.icon-btn {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 1.5rem;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-50%) scale(1.05);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
}

.icon-btn.muted .icon::before {
    content: '🔇';
}

/* Game Layout */
.game-layout {
    display: grid;
    grid-template-columns: minmax(200px, 1fr) auto minmax(200px, 1fr);
    gap: 30px;
    align-items: start;
}

/* Side Panels */
.side-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.15);
    transform: translateY(-2px);
}

.stat-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 600;
}

.stat-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.high-score .stat-value {
    background: linear-gradient(135deg, var(--neon-yellow), var(--neon-orange));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Next Piece Container */
.next-piece-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
    backdrop-filter: blur(10px);
    text-align: center;
}

#nextPieceCanvas {
    margin-top: 15px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* Controls Info */
.controls-info {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
    backdrop-filter: blur(10px);
}

.controls-info h3 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-weight: 600;
}

.control-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.key {
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 6px;
    padding: 4px 10px;
    font-family: 'Orbitron', monospace;
    font-size: 0.85rem;
    color: var(--neon-cyan);
    min-width: 60px;
    text-align: center;
}

/* Game Container */
.game-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

#gameCanvas {
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.5);
    box-shadow: 
        0 0 40px rgba(0, 240, 255, 0.2),
        inset 0 0 60px rgba(0, 0, 0, 0.5);
    display: block;
}

/* Game Overlay */
.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    transition: opacity 0.3s ease;
}

.game-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    padding: 40px;
}

#overlayTitle {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
    animation: pulse-glow 2s ease-in-out infinite;
}

#overlayMessage {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* Buttons */
.game-btn {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    padding: 14px 32px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.game-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.game-btn:hover::before {
    width: 300px;
    height: 300px;
}

.game-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
}

.game-btn:active {
    transform: translateY(0);
}

.game-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.game-btn.secondary {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    box-shadow: none;
}

.game-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(0, 240, 255, 0.5);
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.2);
}

.game-controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Mobile Touch Controls */
.mobile-controls {
    display: none;
    margin-top: 30px;
}

.touch-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.touch-btn {
    width: 60px;
    height: 60px;
    border: 2px solid var(--glass-border);
    background: var(--glass-bg);
    border-radius: 12px;
    font-size: 1.5rem;
    color: var(--neon-cyan);
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}

.touch-btn:active {
    background: rgba(0, 240, 255, 0.2);
    border-color: var(--neon-cyan);
    transform: scale(0.95);
}

.direction-pad {
    display: grid;
    grid-template-columns: repeat(3, 60px);
    gap: 10px;
}

#leftBtn { grid-column: 1; grid-row: 1; }
#downBtn { grid-column: 2; grid-row: 1; }
#rightBtn { grid-column: 3; grid-row: 1; }

/* Responsive Design */
@media (max-width: 1200px) {
    .game-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .left-panel, .right-panel {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .stat-card, .next-piece-container, .controls-info {
        flex: 1;
        min-width: 150px;
    }
    
    .game-controls {
        flex-direction: row;
        width: 100%;
    }
    
    .game-controls .game-btn {
        flex: 1;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }
    
    .icon-btn {
        position: static;
        transform: none;
        margin-top: 15px;
    }
    
    :root {
        --block-size: 20px;
    }
    
    .stat-value {
        font-size: 1.8rem;
    }
    
    .controls-info {
        display: none;
    }
    
    .mobile-controls {
        display: block;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2rem;
        letter-spacing: 0.15rem;
    }
    
    .left-panel, .right-panel {
        gap: 10px;
    }
    
    .stat-card {
        padding: 15px;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    :root {
        --block-size: 16px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.stat-card {
    animation: fadeIn 0.6s ease-out backwards;
}

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:nth-child(4) { animation-delay: 0.4s; }