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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #121212;
    color: #f0f0f0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.game-container {
    width: 100%;
    max-width: 800px;
    background-color: #1e1e1e;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.game-header {
    padding: 15px;
    background-color: #252525;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.back-button {
    position: absolute;
    left: 15px;
    top: 15px;
    color: #0088ff;
    text-decoration: none;
    font-weight: bold;
}

.back-button:hover {
    text-decoration: underline;
}

h1 {
    color: #0088ff;
    margin-bottom: 10px;
}

.controls-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    font-size: 0.9rem;
    color: #b0b0b0;
}

.game-board-container {
    display: flex;
    padding: 20px;
    gap: 20px;
}

#game-canvas {
    background-color: #000;
    border: 2px solid #333;
    height: 600px;
    width: 300px;
}

.stats-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.next-container, .score-container, .level-container, .lines-container {
    background-color: #252525;
    padding: 15px;
    border-radius: 5px;
    text-align: center;
}

.next-container h3, .score-container h3, .level-container h3, .lines-container h3 {
    margin-bottom: 10px;
    color: #0088ff;
}

#next-piece {
    height: 100px;
    background-color: #1a1a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
}

#score, #level, #lines {
    font-size: 2rem;
    font-weight: bold;
}

button {
    background-color: #0088ff;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #0066cc;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .game-board-container {
        flex-direction: column-reverse;
    }
    
    #game-canvas {
        width: 100%;
        height: auto;
        aspect-ratio: 1/2;
    }
    
    .stats-container {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
    
    #start-button, #restart-button {
        grid-column: span 2;
    }
}