/* ─── TheQuantAI — Design System ─── */
/* Palette: Violet #7C3AED → Indigo #4F46E5 | Amber #F59E0B accent */

:root {
    --violet-50: #F5F3FF;
    --violet-100: #EDE9FE;
    --violet-200: #DDD6FE;
    --violet-400: #A78BFA;
    --violet-500: #8B5CF6;
    --violet-600: #7C3AED;
    --violet-700: #6D28D9;
    --violet-800: #5B21B6;
    --violet-900: #4C1D95;
    --indigo-500: #6366F1;
    --indigo-600: #4F46E5;
    --amber-400: #FBBF24;
    --amber-500: #F59E0B;
    --gray-50: #FAFAFA;
    --gray-100: #F4F4F5;
    --gray-200: #E4E4E7;
    --gray-300: #D4D4D8;
    --gray-400: #A1A1AA;
    --gray-500: #71717A;
    --gray-600: #52525B;
    --gray-700: #3F3F46;
    --gray-800: #27272A;
    --gray-900: #18181B;
    --gray-950: #09090B;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 40px rgba(124,58,237,0.15);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--gray-800);
    background: white;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ─── Navigation ─── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, background 0.3s;
}
.nav.scrolled {
    border-bottom-color: var(--gray-200);
    background: rgba(255,255,255,0.95);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--gray-900);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav-links a {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}
.nav-links a:hover { color: var(--violet-600); }
.nav-github {
    display: flex;
    align-items: center;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
}
.nav-github:hover { background: var(--gray-100); }
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: transform 0.3s;
}

/* ─── Hero ─── */
.hero {
    position: relative;
    padding: 160px 0 100px;
    overflow: hidden;
    background: linear-gradient(180deg, var(--violet-50) 0%, white 100%);
}
.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(124,58,237,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124,58,237,0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, rgba(124,58,237,0.12) 0%, transparent 70%);
}
.hero-content {
    position: relative;
    text-align: center;
    z-index: 1;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: white;
    border: 1px solid var(--violet-200);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--violet-700);
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}
.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.2rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--gray-900);
    margin-bottom: 20px;
}
.gradient-text {
    background: linear-gradient(135deg, var(--violet-600), var(--indigo-600), var(--violet-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: 1.2rem;
    color: var(--gray-500);
    max-width: 680px;
    margin: 0 auto 36px;
    line-height: 1.7;
}
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}
.stat {
    text-align: center;
}
.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--violet-600);
    letter-spacing: -0.02em;
}
.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    font-weight: 500;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--violet-600), var(--indigo-600));
    color: white;
    box-shadow: 0 4px 14px rgba(124,58,237,0.35);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124,58,237,0.45);
}
.btn-secondary {
    background: white;
    color: var(--gray-800);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
    transform: translateY(-1px);
}
.btn-outline {
    background: transparent;
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
}

/* ─── Sections ─── */
.section {
    padding: 100px 0;
}
.section-dark {
    background: var(--gray-950);
    color: white;
}
.section-dark .section-desc {
    color: var(--gray-400);
}
.section-header {
    text-align: center;
    margin-bottom: 64px;
}
.section-tag {
    display: inline-block;
    padding: 4px 16px;
    background: var(--violet-100);
    color: var(--violet-700);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
}
.section-dark .section-tag {
    background: rgba(124,58,237,0.2);
    color: var(--violet-400);
}
.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
    margin-bottom: 16px;
}
.section-desc {
    font-size: 1.1rem;
    color: var(--gray-500);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ─── Mission Grid ─── */
.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}
.mission-card {
    padding: 32px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
}
.mission-card:hover {
    border-color: var(--violet-200);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}
.mission-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}
.mission-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--gray-900);
}
.mission-card p {
    color: var(--gray-500);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ─── Verticals ─── */
.verticals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
}
.vertical-card {
    padding: 40px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-xl);
    transition: all 0.3s;
}
.vertical-card:hover {
    border-color: rgba(124,58,237,0.3);
    background: rgba(255,255,255,0.08);
}
.vertical-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 20px;
}
.vertical-badge.active { background: rgba(34,197,94,0.15); color: #4ade80; }
.vertical-badge.coming { background: rgba(251,191,36,0.15); color: var(--amber-400); }
.vertical-logo { margin-bottom: 16px; filter: brightness(1.3); }
.vertical-card h3 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 4px;
}
.vertical-tagline {
    color: var(--violet-400);
    font-weight: 500;
    margin-bottom: 16px;
    font-size: 1rem;
}
.vertical-card > p:not(.vertical-tagline) {
    color: var(--gray-400);
    line-height: 1.7;
    margin-bottom: 20px;
}
.vertical-features {
    list-style: none;
    margin-bottom: 28px;
}
.vertical-features li {
    padding: 6px 0;
    color: var(--gray-300);
    font-size: 0.95rem;
}
.vertical-features li::before {
    content: "✦ ";
    color: var(--violet-400);
}

/* ─── Technology ─── */
.tech-showcase {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: start;
}
.tech-code {
    background: var(--gray-950);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-800);
}
.code-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: var(--gray-900);
    border-bottom: 1px solid var(--gray-800);
}
.code-dots { display: flex; gap: 8px; }
.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot.red { background: #FF5F57; }
.dot.yellow { background: #FEBC2E; }
.dot.green { background: #28C840; }
.code-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--gray-400);
}
.code-block {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 0.88rem;
    line-height: 1.8;
    color: #E4E4E7;
    overflow-x: auto;
}
.code-block .kw { color: #C084FC; }
.code-block .mod { color: #67E8F9; }
.code-block .fn { color: #67E8F9; }
.code-block .str { color: #86EFAC; }
.code-block .num { color: var(--amber-400); }
.code-block .cmt { color: #71717A; font-style: italic; }

.tech-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.tech-feature {
    display: flex;
    gap: 16px;
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    transition: all 0.2s;
}
.tech-feature:hover {
    border-color: var(--violet-200);
    box-shadow: var(--shadow);
}
.tech-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    text-align: center;
}
.tech-feature h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--gray-900);
}
.tech-feature p {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.5;
}

/* ─── Timeline / Roadmap ─── */
.timeline {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(255,255,255,0.1);
}
.timeline-item {
    display: flex;
    gap: 32px;
    padding-bottom: 48px;
    position: relative;
}
.timeline-marker {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--gray-800);
    border: 2px solid var(--gray-600);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    transition: all 0.3s;
}
.timeline-item.active .timeline-marker {
    background: var(--violet-600);
    border-color: var(--violet-400);
    box-shadow: 0 0 20px rgba(124,58,237,0.4);
}
.timeline-item.completed .timeline-marker {
    background: #059669;
    border-color: #34D399;
    box-shadow: 0 0 16px rgba(5,150,105,0.3);
}
.timeline-item.completed .timeline-marker::after {
    content: '✓';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 13px;
    font-weight: 700;
}
.timeline-date {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--violet-400);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
}
.timeline-content h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.timeline-content p {
    color: var(--gray-400);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ─── Team ─── */
.team-grid {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}
.team-card {
    text-align: center;
    padding: 40px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    max-width: 360px;
    transition: all 0.3s;
}
.team-card:hover {
    border-color: var(--violet-200);
    box-shadow: var(--shadow-glow);
}
.team-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--violet-600), var(--indigo-600));
    color: white;
    font-size: 2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}
.team-card h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gray-900);
}
.team-role {
    color: var(--violet-600);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 12px;
}
.team-bio {
    color: var(--gray-500);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}
.team-links {
    display: flex;
    justify-content: center;
    gap: 16px;
}
.team-links a {
    color: var(--gray-400);
    transition: color 0.2s;
}
.team-links a:hover { color: var(--violet-600); }
.team-hiring {
    text-align: center;
    color: var(--gray-500);
    font-size: 1rem;
    line-height: 1.6;
}
.team-hiring a {
    color: var(--violet-600);
    text-decoration: none;
    font-weight: 600;
}
.team-hiring a:hover { text-decoration: underline; }

/* ─── Blog ─── */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.blog-card {
    display: block;
    padding: 28px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all 0.25s;
    background: white;
}
.blog-card:hover {
    border-color: var(--violet-200);
    box-shadow: var(--shadow-glow);
    transform: translateY(-3px);
}
.blog-meta {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--violet-600);
    margin-bottom: 10px;
}
.blog-card h3 {
    color: var(--gray-900);
    font-size: 1.1rem;
    line-height: 1.35;
    margin-bottom: 10px;
}
.blog-card p {
    color: var(--gray-500);
    font-size: 0.94rem;
    margin-bottom: 14px;
}
.blog-link {
    color: var(--violet-600);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ─── CTA ─── */
.cta-section {
    padding: 80px 0;
}
.cta-inner {
    text-align: center;
    padding: 80px 48px;
    background: linear-gradient(135deg, var(--gray-950), #1E1B4B);
    border-radius: var(--radius-xl);
    color: white;
    position: relative;
    overflow: hidden;
}
.cta-inner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 60% 40%, rgba(124,58,237,0.15) 0%, transparent 60%);
}
.cta-inner h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
}
.cta-inner p {
    color: var(--gray-400);
    margin-bottom: 28px;
    position: relative;
}
.cta-install {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius);
    padding: 14px 24px;
    margin-bottom: 28px;
    position: relative;
}
.cta-install code {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--amber-400);
}
.copy-btn {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: 4px;
    transition: color 0.2s;
}
.copy-btn:hover { color: white; }
.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    position: relative;
}

/* ─── Footer ─── */
.footer {
    background: var(--gray-950);
    color: var(--gray-400);
    padding: 64px 0 32px;
    border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}
.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.footer-brand span {
    font-weight: 700;
    font-size: 1.1rem;
    color: white;
}
.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.6;
}
.footer-location {
    font-size: 0.85rem !important;
    color: var(--gray-500) !important;
}
.footer-col h5 {
    color: white;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
}
.footer-col a {
    display: block;
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 4px 0;
    transition: color 0.2s;
}
.footer-col a:hover { color: white; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
    .tech-showcase { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .verticals-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        padding: 24px;
        border-bottom: 1px solid var(--gray-200);
        gap: 16px;
        box-shadow: var(--shadow-lg);
    }
    .nav-toggle { display: flex; }
    .hero { padding: 120px 0 60px; }
    .hero-stats { gap: 24px; }
    .section { padding: 64px 0; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}