:root {
    --bg-color: #050505;
    --neon-magenta: #ff00ff;
    --neon-cyan: #00ffff;
    --neon-yellow: #ffff00;
    --text-color: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-main: 'Rajdhani', sans-serif;
    --font-title: 'Orbitron', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

#game-container {
    position: relative;
    width: 800px;
    height: 600px;
    background: #000;
    border: 2px solid var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3), inset 0 0 10px rgba(0, 255, 255, 0.1);
    overflow: hidden;
    border-radius: 8px;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s;
    background: radial-gradient(circle, #111 0%, #000 100%);
    padding: 2rem;
    z-index: 10;
}

.screen.active {
    opacity: 1;
    visibility: visible;
}

/* Typography */
h1 {
    font-family: var(--font-title);
    font-size: 4.5rem;
    margin-bottom: 2rem;
    color: var(--neon-magenta);
    text-shadow: 0 0 10px var(--neon-magenta), 0 0 20px var(--neon-magenta);
    letter-spacing: 0.5rem;
}

h2 {
    font-family: var(--font-title);
    font-size: 2.5rem;
    color: var(--neon-cyan);
    margin-bottom: 1.5rem;
    text-shadow: 0 0 10px var(--neon-cyan);
}

/* Buttons */
.menu-options {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}

.neon-btn {
    background: transparent;
    border: 2px solid var(--neon-cyan);
    color: var(--neon-cyan);
    padding: 1rem 3rem;
    font-size: 1.2rem;
    font-family: var(--font-title);
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

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

.neon-btn.smaller {
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
}

/* Sound Toggle */
.toggle-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    font-family: var(--font-title);
    font-size: 0.9rem;
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #333;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--neon-magenta);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* Instructions */
.control-grid {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    width: 100%;
    max-width: 400px;
}

.control-item {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.control-item span {
    color: var(--neon-yellow);
    font-weight: bold;
}

/* Game Interface (HUD) */
#game-screen {
    padding: 0;
    background: #000;
}

#hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    background: rgba(0, 0, 0, 0.8);
    border-bottom: 1px solid var(--neon-cyan);
    font-family: var(--font-title);
    font-size: 1rem;
    z-index: 20;
}

.hud-item span {
    color: var(--neon-yellow);
}

#pause-btn {
    background: transparent;
    border: 1px solid var(--neon-magenta);
    color: var(--neon-magenta);
    padding: 2px 10px;
    cursor: pointer;
    border-radius: 3px;
}

#game-canvas {
    width: 800px;
    height: 600px;
    display: block;
}

/* Animations */
@keyframes glitch {
    0% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
    100% { transform: translate(0); }
}

.glitch-text:hover {
    animation: glitch 0.3s cubic-bezier(.25,.46,.45,.94) both infinite;
}