:root {
    --bg-primary: #05050A; /* Ultra deep concept 1 dark */
    --bg-secondary: rgba(15, 15, 25, 0.6);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --border-glass: rgba(0, 255, 255, 0.1);
    
    --accent-cyan: #00f2fe;
    --accent-pink: #f5576c;
    --accent-purple: #a78bfa;
    --accent-yellow: #fab005;
    --accent-green: #37b24d;
    --accent-red: #ff6b6b;
    
    --text-main: #f8f9fa;
    --text-muted: #adb5bd;
    
    --font-heading: 'Press Start 2P', cursive;
    --font-body: 'Inter', system-ui, sans-serif;
    
    --glow-cyan: 0 0 20px rgba(0, 242, 254, 0.4);
    --glow-pink: 0 0 20px rgba(245, 87, 108, 0.4);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 242, 254, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(245, 87, 108, 0.05) 0%, transparent 40%);
    scroll-behavior: smooth;
}

/* Typography */
h1, h2, h3, h4 { line-height: 1.2; }
h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 15px;
}
h2::before {
    content: '';
    display: block;
    width: 6px;
    height: 30px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-pink));
    border-radius: 4px;
    box-shadow: var(--glow-cyan);
}

/* Nav */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: rgba(5, 5, 10, 0.85);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-glass);
    position: sticky;
    top: 0;
    z-index: 100;
}
.logo-container { display: flex; align-items: center; gap: 15px; }
.logo-container img { height: 45px; filter: drop-shadow(0 0 8px var(--accent-cyan)); }
.logo-text { font-family: var(--font-heading); font-size: 1.2rem; background: linear-gradient(90deg, var(--accent-cyan), var(--accent-pink)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links a { color: var(--text-main); text-decoration: none; margin-left: 20px; font-weight: 500; transition: color 0.3s; }
.nav-links a:hover { color: var(--accent-cyan); text-shadow: var(--glow-cyan); }
.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), #005ce6);
    color: white;
    padding: 10px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: var(--glow-cyan);
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(0, 242, 254, 0.6); }

/* Layout Containers */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 5%;
}

.section { margin-bottom: 100px; }

/* Grid & Cards (Glassmorphism) */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 30px;
    backdrop-filter: blur(12px);
    transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}
.card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 242, 254, 0.3);
    box-shadow: inset 0 0 20px rgba(0, 242, 254, 0.05), var(--glow-cyan);
}
.card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.card p { color: var(--text-muted); margin-bottom: 20px; }

/* Hero */
.hero {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
    min-height: 80vh;
    padding-top: 40px;
}
.hero-text { flex: 1; min-width: 300px; }
.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff, var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-title span { color: var(--accent-pink); text-shadow: var(--glow-pink); -webkit-text-fill-color: #f5576c; }
.hero-subtitle { font-size: 1.2rem; color: var(--text-muted); margin-bottom: 30px; }
.hero-visual {
    flex: 1;
    min-width: 300px;
    position: relative;
    border-radius: 20px;
    padding: 2px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-pink));
    animation: floating 6s ease-in-out infinite;
    box-shadow: var(--glow-cyan);
}
.hero-visual video { width: 100%; display: block; border-radius: 18px; background: #000; }

@keyframes floating {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Badges / Keys */
.key-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: bold;
    font-size: 0.85rem;
    margin-right: 8px;
    margin-bottom: 8px;
    color: white;
    font-family: 'Inter', monospace;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
    background: linear-gradient(135deg, #495057, #212529);
    border-bottom: 2px solid #000;
}
.key-red { background: linear-gradient(135deg, var(--accent-red), #c92a2a); }
.key-green { background: linear-gradient(135deg, var(--accent-green), #2b8a3e); }
.key-yellow { background: linear-gradient(135deg, var(--accent-yellow), #e67700); color: #000; text-shadow: none; }
.key-blue { background: linear-gradient(135deg, #339af0, #1864ab); }
.key-dpad { border-radius: 50%; width: 32px; height: 32px; padding: 0; }

/* Instruction Lists */
.instruction-list { list-style: none; }
.instruction-list li {
    display: flex;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.instruction-list li:last-child { border-bottom: none; }
.desc { color: var(--text-muted); font-size: 0.95rem; }

/* Powerups */
.powerup-container { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 15px; }
.powerup-tag {
    background: rgba(167, 139, 250, 0.1);
    border: 1px solid rgba(167, 139, 250, 0.4);
    color: var(--accent-purple);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Info Boxes */
.info-box {
    background: rgba(55, 178, 77, 0.1);
    border-left: 4px solid var(--accent-green);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
}
.info-box.warn {
    background: rgba(250, 176, 5, 0.1);
    border-left-color: var(--accent-yellow);
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 5%;
    border-top: 1px solid var(--border-glass);
    color: var(--text-muted);
}
footer a { color: var(--text-muted); text-decoration: none; margin: 0 10px; transition: color 0.2s; }
footer a:hover { color: var(--accent-cyan); }

/* Ambient Sprites Background */
.ambient-sprites {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.sprite {
    position: absolute;
    opacity: 0.15;
}

.sprite-ship { width: 60px; filter: drop-shadow(0 0 15px var(--accent-cyan)); animation: flyRight 38s linear infinite; top: 15%; left: -100px; }
.sprite-alien1 { width: 45px; filter: drop-shadow(0 0 15px var(--accent-red)); animation: flyLeft 22s linear infinite; top: 25%; right: -100px; }
.sprite-boss { width: 140px; filter: drop-shadow(0 0 20px var(--accent-red)); animation: bossFloat 40s ease-in-out infinite alternate; top: 5%; right: 10%; }
.sprite-fairy { width: 50px; filter: drop-shadow(0 0 15px var(--accent-pink)); animation: fairyFlutter 25s ease-in-out infinite; bottom: 25%; left: -100px; }
.sprite-bat { width: 55px; filter: drop-shadow(0 0 15px var(--accent-purple)); animation: flyRight 25s linear infinite 5s; top: 55%; left: -100px; }
.sprite-dragon { width: 130px; filter: drop-shadow(0 0 20px var(--accent-yellow)); animation: flyLeft 35s linear infinite 10s; bottom: 15%; right: -150px; }

@keyframes flyRight {
    0% { transform: translateX(0) translateY(0) rotate(5deg); }
    33% { transform: translateX(33vw) translateY(-30px) rotate(-5deg); }
    66% { transform: translateX(66vw) translateY(30px) rotate(5deg); }
    100% { transform: translateX(120vw) translateY(0) rotate(-5deg); }
}

@keyframes flyLeft {
    0% { transform: translateX(0) scaleX(-1) translateY(0); }
    50% { transform: translateX(-50vw) scaleX(-1) translateY(-40px); }
    100% { transform: translateX(-120vw) scaleX(-1) translateY(0); }
}

@keyframes bossFloat {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-120px, 40px) scale(1.05); }
    100% { transform: translate(60px, -20px) scale(0.95); }
}

@keyframes fairyFlutter {
    0% { transform: translate(0, 0) scaleX(1); }
    15% { transform: translate(15vw, -60px) scaleX(1); }
    30% { transform: translate(30vw, 30px) scaleX(1); }
    50% { transform: translate(50vw, -40px) scaleX(-1); }
    70% { transform: translate(80vw, 20px) scaleX(-1); }
    100% { transform: translate(120vw, 0) scaleX(1); }
}

.sprite-block-cyan { width: 35px; filter: drop-shadow(0 0 10px var(--accent-cyan)); animation: fallDown 20s linear infinite; top: -50px; left: 15%; }
.sprite-block-magenta { width: 35px; filter: drop-shadow(0 0 10px var(--accent-pink)); animation: fallDown 25s linear infinite 12s; top: -50px; right: 25%; }
.sprite-snake { width: 120px; filter: drop-shadow(0 0 15px var(--accent-green)); animation: slither 30s linear infinite 5s; bottom: 8%; left: -150px; }
.sprite-coin-red { width: 40px; filter: drop-shadow(0 0 15px var(--accent-red)); animation: fallDown 18s ease-in infinite 8s; top: -50px; left: 45%; }
.sprite-coin-yellow { width: 40px; filter: drop-shadow(0 0 15px var(--accent-yellow)); animation: fallDown 22s ease-in infinite 2s; top: -50px; right: 40%; }

@keyframes fallDown {
    0% { transform: translateY(-50px) rotate(0deg); }
    100% { transform: translateY(120vh) rotate(360deg); }
}

@keyframes slither {
    0% { transform: translateX(0) translateY(0); }
    25% { transform: translateX(25vw) translateY(-20px); }
    50% { transform: translateX(50vw) translateY(20px); }
    75% { transform: translateX(75vw) translateY(-20px); }
    100% { transform: translateX(110vw) translateY(0); }
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 15px;
        padding: 15px 5%;
        text-align: center;
    }
    .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    .nav-links a {
        margin-left: 0 !important;
        font-size: 0.9rem;
        padding: 5px;
    }
    .nav-links .btn-primary {
        width: 100%;
        margin-top: 10px;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-text {
        text-align: center;
    }
    .hero-text div {
        justify-content: center;
    }
}

.sprite-paddle { width: 80px; filter: drop-shadow(0 0 15px var(--accent-yellow)); animation: flyLeft 35s linear infinite 15s; bottom: 20%; right: -150px; }
.sprite-breakout-ball { width: 25px; filter: drop-shadow(0 0 20px var(--accent-cyan)); animation: breakoutBounce 15s linear infinite 5s; bottom: 30%; left: -50px; }

@keyframes breakoutBounce {
    0% { transform: translate(0, 0); }
    25% { transform: translate(30vw, -200px); }
    50% { transform: translate(60vw, 50px); }
    75% { transform: translate(90vw, -150px); }
    100% { transform: translate(120vw, 0); }
}

.sprite-brock {
    width: 48px;
    filter: drop-shadow(0 0 10px var(--accent-yellow));
    animation: walkRight 30s linear infinite 10s;
    bottom: 10%;
    left: -100px;
}

.sprite-bd-diamond {
    width: 32px;
    filter: drop-shadow(0 0 12px var(--accent-yellow));
    animation: fallDown 22s ease-in infinite 5s;
    top: -50px;
    left: 65%;
}

.sprite-bd-boulder {
    width: 35px;
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.2));
    animation: fallDown 26s ease-in infinite 15s;
    top: -50px;
    right: 18%;
}

@keyframes walkRight {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(120vw) translateY(0); }
}