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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.game-container {
    display: flex;
    gap: 30px;
    background: rgba(0, 0, 0, 0.3);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.game-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 200px;
}

.game-info h1 {
    font-size: 2.5em;
    text-align: center;
    color: #ffff00;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: 10px;
}

.score-display {
    background: rgba(0, 0, 0, 0.4);
    padding: 15px;
    border-radius: 10px;
    border: 2px solid #ffff00;
}

.score-display p {
    margin: 5px 0;
    font-size: 1.1em;
    font-weight: bold;
}

.next-piece {
    background: rgba(0, 0, 0, 0.4);
    padding: 15px;
    border-radius: 10px;
    border: 2px solid #00ff00;
    text-align: center;
}

.next-piece h3 {
    margin-bottom: 10px;
    color: #00ff00;
}

#next-canvas {
    background: #000;
    border: 1px solid #333;
}

.controls {
    background: rgba(0, 0, 0, 0.4);
    padding: 15px;
    border-radius: 10px;
    border: 2px solid #ff6b6b;
}

.controls h3 {
    margin-bottom: 10px;
    color: #ff6b6b;
}

.controls p {
    margin: 3px 0;
    font-size: 0.9em;
}

.game-board {
    position: relative;
}

#game-canvas {
    background: #000;
    border: 3px solid #fff;
    border-radius: 5px;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    border: 3px solid #ff0000;
    box-shadow: 0 0 30px rgba(255, 0, 0, 0.5);
}

.game-over h2 {
    color: #ff0000;
    margin-bottom: 15px;
    font-size: 2em;
}

.game-over p {
    margin-bottom: 20px;
    font-size: 1.2em;
}

#restart-btn {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 1.1em;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

#restart-btn:hover {
    background: #45a049;
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    .game-container {
        flex-direction: column;
        align-items: center;
        padding: 20px;
    }
    
    .game-info {
        width: 100%;
        max-width: 300px;
        order: 2;
    }
    
    .game-board {
        order: 1;
    }
    
    #game-canvas {
        width: 250px;
        height: 500px;
    }
}