:root {
    --bg-color: #050510;
    --lane-color: #1a1a2e;
    --lane-border: #303050;
    --neon-blue: #00f3ff;
    --neon-pink: #ff00ff;
    --text-color: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Courier New', Courier, monospace;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    max-width: 800px; /* Aspect ratio control */
    background: linear-gradient(180deg, #000000 0%, #1a1a2e 100%);
    box-shadow: 0 0 50px rgba(0, 243, 255, 0.1);
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#score-display, #combo-display {
    position: absolute;
    font-size: 24px;
    font-weight: bold;
    text-shadow: 0 0 10px var(--neon-blue);
}

#score-display {
    top: 20px;
    left: 20px;
}

#combo-display {
    top: 50px;
    left: 20px;
    color: var(--neon-pink);
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.8);
    z-index: 10;
    pointer-events: auto;
}

.screen.hidden {
    display: none;
}

h1 {
    font-size: 64px;
    margin-bottom: 20px;
    color: transparent;
    -webkit-text-stroke: 2px var(--neon-blue);
    text-shadow: 0 0 20px var(--neon-blue);
    letter-spacing: 5px;
}

p {
    font-size: 24px;
    margin-bottom: 10px;
    text-shadow: 0 0 5px white;
    animation: pulse 1.5s infinite alternate;
}

.controls {
    margin-top: 30px;
    font-size: 18px;
    color: #aaa;
    animation: none;
}

@keyframes pulse {
    from { opacity: 0.6; }
    to { opacity: 1; }
}