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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    overflow: hidden;
}

#game-container {
    position: relative;
}

#canvas {
    border: 5px solid #fff;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    cursor: crosshair;
    touch-action: none;
}

/* controls overlay inside the card */
#controls {
    position: absolute;
    top: 16px;
    right: 18px;
    z-index: 5;
}

/* start button style (compact for overlay) */
#controls button {
    padding: 6px 14px;
    border-radius: 999px;
    border: none;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    transition: transform 0.2s, box-shadow 0.2s;
}

#controls button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
}

#controls button:active {
    transform: translateY(0);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    
    #controls {
        top: 10px;
        right: 12px;
    }
    
    #controls button {
        padding: 5px 12px;
        font-size: 11px;
    }
}