:root {
    --neon-cyan: #00f2ff;
    --neon-pink: #ff00de;
    --neon-purple: #9d00ff;
    --bg-dark: #050505;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-dark);
    color: white;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at center, #1a0033 0%, #050505 100%);
}

#game-canvas {
    display: block;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

.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, 0.7);
    backdrop-filter: blur(8px);
    pointer-events: auto;
    z-index: 100;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

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

/* Typography */
.neon-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 5rem;
    font-weight: 900;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.5rem;
    text-shadow: 
        0 0 10px #fff,
        0 0 20px var(--neon-cyan),
        0 0 40px var(--neon-cyan),
        0 0 80px var(--neon-cyan);
    margin-bottom: 0.5rem;
    animation: pulse 2s infinite alternate;
}

.subtitle {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    color: var(--neon-pink);
    letter-spacing: 0.3rem;
    margin-bottom: 3rem;
    text-shadow: 0 0 10px var(--neon-pink);
}

.neon-text {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    color: var(--neon-pink);
    text-shadow: 0 0 15px var(--neon-pink);
    margin-bottom: 2rem;
}

/* Buttons */
.neon-button {
    pointer-events: auto;
    background: transparent;
    border: 2px solid var(--neon-cyan);
    padding: 1rem 3rem;
    color: var(--neon-cyan);
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    touch-action: manipulation;
    z-index: 101;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(0, 242, 255, 0.3);
}

.neon-button:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 30px var(--neon-cyan);
}

.controls-info {
    margin-bottom: 2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    letter-spacing: 0.1rem;
}

.controls-info p {
    margin: 0.5rem 0;
}

/* HUD */
#hud {
    position: absolute;
    top: 2rem;
    left: 2rem;
    right: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    pointer-events: none;
}

.hud-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 1rem;
    backdrop-filter: blur(4px);
}

#score-container {
    display: flex;
    flex-direction: column;
}

#score-container .label {
    font-size: 0.7rem;
    color: var(--neon-cyan);
    letter-spacing: 0.1rem;
    margin-bottom: 0.2rem;
}

#score-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    color: #fff;
    text-shadow: 0 0 5px #fff;
}

#health-container {
    width: 200px;
}

#health-bar-bg {
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    overflow: hidden;
}

#health-bar-fill {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--neon-pink), var(--neon-purple));
    box-shadow: 0 0 10px var(--neon-pink);
    transition: width 0.3s ease;
}

.final-score {
    margin-bottom: 2rem;
    text-align: center;
}

.final-score .label {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0.5rem;
}

#final-score-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan);
}

.final-time {
    margin-bottom: 2.5rem;
    text-align: center;
}

.final-time .label {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0.5rem;
}

#final-time-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    color: var(--neon-pink);
    text-shadow: 0 0 10px var(--neon-pink);
}

/* Animations */
@keyframes pulse {
    from {
        text-shadow: 
            0 0 10px #fff,
            0 0 20px var(--neon-cyan),
            0 0 40px var(--neon-cyan),
            0 0 80px var(--neon-cyan);
    }
    to {
        text-shadow: 
            0 0 5px #fff,
            0 0 10px var(--neon-cyan),
            0 0 20px var(--neon-cyan),
            0 0 40px var(--neon-cyan);
    }
}

@media (max-width: 768px) {
    .neon-title {
        font-size: 3rem;
    }
    .neon-text {
        font-size: 2rem;
    }
    #hud {
        top: 1rem;
        left: 1rem;
        right: 1rem;
    }
    #health-container {
        width: 120px;
    }
}