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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    text-align: center;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: #00ff88;
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.score-board {
    display: flex;
    justify-content: space-around;
    max-width: 800px;
    margin: 0 auto 20px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.score {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.score span:first-child {
    font-size: 0.9rem;
    color: #aaaaaa;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.score span:last-child {
    font-size: 2rem;
    font-weight: bold;
    color: #00ff88;
}

#gameCanvas {
    border: 3px solid #00ff88;
    border-radius: 5px;
    background: #0a0a0a;
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.3);
    display: block;
    margin: 0 auto;
}

.controls {
    margin-top: 20px;
    font-size: 0.9rem;
    color: #aaaaaa;
}

.controls strong {
    color: #00ff88;
}

.back-link {
    position: fixed;
    top: 20px;
    left: 20px;
    color: #00ff88;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 8px 16px;
    border: 1px solid rgba(0, 255, 136, 0.3);
    border-radius: 4px;
    transition: all 0.2s ease;
    background: rgba(0, 0, 0, 0.3);
}

.back-link:hover {
    border-color: #00ff88;
    background: rgba(0, 255, 136, 0.1);
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.3);
}

@media (max-width: 850px) {
    #gameCanvas {
        max-width: 100%;
        height: auto;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .back-link {
        top: 10px;
        left: 10px;
        font-size: 0.8rem;
        padding: 6px 12px;
    }
}