:root {
    --bg-primary: #06080c;
    --bg-card: rgba(12, 17, 27, 0.7);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glass-hover: rgba(255, 255, 255, 0.18);
    
    --accent-cyan: #00f2fe;
    --accent-orange: #ff7b72;
    --accent-purple: #bc8cff;
    --accent-magenta: #ff007f;
    --accent-blue: #3890ff;
    --accent-green: #56d364;
    --accent-red: #ff3333;
    
    --text-main: #f0f6fc;
    --text-muted: #8b949e;
    
    --font-sans: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --transition-speed: 0.3s;
    --border-radius: 20px;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    display: flex;
    justify-content: center;
    padding: 3rem 1.5rem;
}

/* Subtle background stars space */
.cosmos-bg {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
        radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px),
        radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px);
    background-size: 550px 550px, 350px 350px;
    background-position: 0 0, 40px 60px;
    opacity: 0.15;
    z-index: -1;
}

.container {
    width: 100%;
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* Hero Title section */
.hero-section {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem 0;
}

.logo-glow {
    font-size: 3.5rem;
    color: var(--accent-cyan);
    filter: drop-shadow(0 0 15px rgba(0, 242, 254, 0.4));
    margin-bottom: 0.5rem;
    animation: rotateAtom 20s linear infinite;
}

@keyframes rotateAtom {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-section h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #ffffff 30%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 600px;
    line-height: 1.5;
}

.header-badges {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.badge {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    padding: 0.5rem 1rem;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.link-badge {
    text-decoration: none;
    transition: all var(--transition-speed);
}

.link-badge:hover {
    background: rgba(0, 242, 254, 0.08);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* Grid layout for Cards */
.simulations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: all var(--transition-speed);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--border-glass-hover);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-icon {
    font-size: 1.5rem;
}

.category-tag {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.card h3 {
    font-size: 1.3rem;
    font-weight: 700;
}

.card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
    flex-grow: 1;
}

.launch-btn {
    text-decoration: none;
    padding: 0.75rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all var(--transition-speed);
}

/* Theme accent definitions */
.card-cyan:hover { box-shadow: 0 8px 30px rgba(0, 242, 254, 0.08); border-color: rgba(0, 242, 254, 0.3); }
.card-cyan .card-icon { color: var(--accent-cyan); }
.card-cyan .launch-btn { background: rgba(0, 242, 254, 0.05); color: var(--accent-cyan); border: 1px solid rgba(0, 242, 254, 0.15); }
.card-cyan .launch-btn:hover { background: var(--accent-cyan); color: #000; }

.card-orange:hover { box-shadow: 0 8px 30px rgba(255, 123, 114, 0.08); border-color: rgba(255, 123, 114, 0.3); }
.card-orange .card-icon { color: var(--accent-orange); }
.card-orange .launch-btn { background: rgba(255, 123, 114, 0.05); color: var(--accent-orange); border: 1px solid rgba(255, 123, 114, 0.15); }
.card-orange .launch-btn:hover { background: var(--accent-orange); color: #000; }

.card-purple:hover { box-shadow: 0 8px 30px rgba(188, 140, 255, 0.08); border-color: rgba(188, 140, 255, 0.3); }
.card-purple .card-icon { color: var(--accent-purple); }
.card-purple .launch-btn { background: rgba(188, 140, 255, 0.05); color: var(--accent-purple); border: 1px solid rgba(188, 140, 255, 0.15); }
.card-purple .launch-btn:hover { background: var(--accent-purple); color: #000; }

.card-magenta:hover { box-shadow: 0 8px 30px rgba(255, 0, 127, 0.08); border-color: rgba(255, 0, 127, 0.3); }
.card-magenta .card-icon { color: var(--accent-magenta); }
.card-magenta .launch-btn { background: rgba(255, 0, 127, 0.05); color: var(--accent-magenta); border: 1px solid rgba(255, 0, 127, 0.15); }
.card-magenta .launch-btn:hover { background: var(--accent-magenta); color: #fff; }

.card-blue:hover { box-shadow: 0 8px 30px rgba(56, 144, 255, 0.08); border-color: rgba(56, 144, 255, 0.3); }
.card-blue .card-icon { color: var(--accent-blue); }
.card-blue .launch-btn { background: rgba(56, 144, 255, 0.05); color: var(--accent-blue); border: 1px solid rgba(56, 144, 255, 0.15); }
.card-blue .launch-btn:hover { background: var(--accent-blue); color: #fff; }

.card-green:hover { box-shadow: 0 8px 30px rgba(86, 211, 100, 0.08); border-color: rgba(86, 211, 100, 0.3); }
.card-green .card-icon { color: var(--accent-green); }
.card-green .launch-btn { background: rgba(86, 211, 100, 0.05); color: var(--accent-green); border: 1px solid rgba(86, 211, 100, 0.15); }
.card-green .launch-btn:hover { background: var(--accent-green); color: #000; }

.card-red:hover { box-shadow: 0 8px 30px rgba(255, 51, 51, 0.08); border-color: rgba(255, 51, 51, 0.3); }
.card-red .card-icon { color: var(--accent-red); }
.card-red .launch-btn { background: rgba(255, 51, 51, 0.05); color: var(--accent-red); border: 1px solid rgba(255, 51, 51, 0.15); }
.card-red .launch-btn:hover { background: var(--accent-red); color: #fff; }

/* Footer */
footer {
    text-align: center;
    border-top: 1px dashed var(--border-glass);
    padding-top: 2rem;
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

footer .highlight {
    color: var(--text-main);
    font-weight: 600;
}

footer .tagline {
    font-style: italic;
    font-size: 0.78rem;
}