:root {
    --obsidian-black: #020406;
    --crust-white: #F4F7F9;
    --rigid-gold: #D4AF37;
    --critical-red: #FF3B30;
    --grid-color: rgba(244, 247, 249, 0.05);
}

body {
    background-color: var(--obsidian-black);
    color: var(--crust-white);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.mono {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--obsidian-black);
}
::-webkit-scrollbar-thumb {
    background: var(--rigid-gold);
}

/* Grid Background */
.grid-bg {
    background-image: linear-gradient(var(--grid-color) 1px, transparent 1px),
                      linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 40px 40px;
}

.navbar {
    background-color: rgba(2, 4, 6, 0.95);
    border-bottom: 1px solid var(--rigid-gold);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    color: var(--rigid-gold) !important;
    font-weight: 700;
    font-size: 1.2rem;
}

.nav-link {
    color: var(--crust-white) !important;
    font-size: 0.85rem;
    text-transform: uppercase;
    margin: 0 10px;
    transition: color 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: var(--rigid-gold) !important;
}

.hero-section {
    padding: 150px 0;
    position: relative;
}

.gold-border {
    border: 1px solid var(--rigid-gold);
}

.card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: 0;
    transition: all 0.3s;
}

.card:hover {
    border-color: var(--rigid-gold);
    background: rgba(255, 255, 255, 0.05);
}

.text-gold { color: var(--rigid-gold); }
.text-red { color: var(--critical-red); }

footer {
    background-color: #010203;
    border-top: 1px solid var(--rigid-gold);
    padding: 60px 0;
    font-size: 0.8rem;
}

.stat-box {
    border-left: 2px solid var(--rigid-gold);
    padding-left: 20px;
    margin-bottom: 30px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--rigid-gold);
}

.stat-label {
    text-transform: uppercase;
    font-size: 0.7rem;
    opacity: 0.7;
}

/* MathML Styling */
math {
    font-size: 1.2rem;
    color: var(--crust-white);
}