:root {
    --bg-primary: #09090b;
    --bg-secondary: #0f0f11;
    --bg-card: #151517;
    --bg-card-hover: #1a1a1d;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.12);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --success: #22c55e;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    font-size: 16px;
}

.serif {
    font-family: 'Instrument Serif', Georgia, serif;
}

/* Subtle Background */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
    z-index: 0;
}

/* Container */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 32px;
    position: relative;
    z-index: 1;
}

.container-wide {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    position: relative;
    z-index: 1;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 18px 0;
    background: rgba(9, 9, 11, 0.85);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-mark {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    color: white;
}

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 400;
    transition: color 0.2s;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 26px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: #e4e4e7;
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-hover);
}

.btn-secondary:hover {
    border-color: var(--text-muted);
    background: rgba(255,255,255,0.02);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 13px 0;
}

.btn-ghost:hover {
    color: var(--text-primary);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.6rem, 5.5vw, 3.8rem);
    line-height: 1.1;
}

h2 {
    font-size: clamp(2rem, 4vw, 2.6rem);
}

h3 {
    font-size: 1.25rem;
}

h1 em, h2 em, h3 em {
    font-family: 'Instrument Serif', Georgia, serif;
    font-style: italic;
    font-weight: 400;
}

.section-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 16px;
    font-weight: 500;
    display: block;
}

/* Section Spacing */
section {
    padding: 120px 0;
}

section.bordered {
    border-top: 1px solid var(--border);
}

section.dark-bg {
    background: var(--bg-secondary);
}

/* Cards */
.card {
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.card.highlight {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--bg-card), var(--accent-glow));
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-in {
    animation: fadeInUp 0.7s ease-out both;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* Footer */
footer {
    padding: 60px 0;
    border-top: 1px solid var(--border);
}

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

.footer-links {
    display: flex;
    gap: 36px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-copy {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Mobile Navigation */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

/* Responsive */
@media (max-width: 900px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    section {
        padding: 80px 0;
    }
    
    .container {
        padding: 0 24px;
    }
}

@media (max-width: 600px) {
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 24px;
    }
}