:root {
    --bg-color: #050510;
    --neon-blue: #00f3ff;
    --neon-pink: #ff00ff;
    --neon-green: #00ff9d;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--bg-color);
    color: white;
    font-family: 'Outfit', sans-serif;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    filter: drop-shadow(0 0 10px rgba(0, 243, 255, 0.2));
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
    /* Let clicks pass through to canvas if needed, but we check specific elements */
}

#score-container {
    position: absolute;
    top: 2rem;
    left: 2rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-blue);
    text-shadow: 0 0 10px var(--neon-blue);
    z-index: 20;
}

.screen {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(5, 5, 16, 0.7);
    backdrop-filter: blur(8px);
    transition: opacity 0.3s ease;
    pointer-events: auto;
}

.screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.screen h1 {
    font-size: 5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, var(--neon-blue), var(--neon-pink));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 243, 255, 0.5);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.screen p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 3rem;
    letter-spacing: 0.1em;
}

.neon-btn {
    background: var(--glass-bg);
    border: 1px solid var(--neon-blue);
    color: var(--neon-blue);
    padding: 1rem 3rem;
    font-size: 1.2rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.2), inset 0 0 10px rgba(0, 243, 255, 0.1);
    transition: all 0.2s ease;
    border-radius: 4px;
}

.neon-btn:hover {
    background: var(--neon-blue);
    color: var(--bg-color);
    box-shadow: 0 0 30px rgba(0, 243, 255, 0.6);
    transform: translateY(-2px);
}

.neon-btn:active {
    transform: translateY(0);
}