@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

:root {
  --bg: #0a0a0a;
  --bg-2: #111111;
  --bg-3: #1a1a1a;
  --border: #222222;
  --border-hover: #333333;
  --blue: #2563eb;
  --blue-light: #3b82f6;
  --blue-glow: rgba(37, 99, 235, 0.15);
  --text: #f0f0f0;
  --text-muted: #888888;
  --text-dim: #555555;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 10px;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--blue-light);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #fff;
}

/* ── Layout ─────────────────────────────────────────── */

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 100px 0;
}

/* ── Nav ─────────────────────────────────────────────── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}

nav.scrolled {
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(12px);
  border-color: var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
}

.nav-logo span {
  color: var(--blue-light);
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.2px;
  transition: color var(--transition);
}

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

/* ── Hero ────────────────────────────────────────────── */

#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(37, 99, 235, 0.07) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 60%, rgba(37, 99, 235, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 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: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.25);
  border-radius: 100px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--blue-light);
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.1s forwards;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-light);
  box-shadow: 0 0 8px var(--blue-light);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

h1 {
  font-size: clamp(42px, 7vw, 76px);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.05;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.2s forwards;
}

h1 .accent {
  color: var(--blue-light);
}

.hero-tagline {
  font-size: clamp(17px, 2.5vw, 20px);
  color: var(--text-muted);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 44px;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.3s forwards;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.4s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 0 24px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  background: var(--blue-light);
  color: #fff;
  box-shadow: 0 0 32px rgba(59, 130, 246, 0.4);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: var(--border-hover);
  color: var(--text);
  transform: translateY(-1px);
}

/* ── Section headings ────────────────────────────────── */

.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--blue-light);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 16px;
}

.section-sub {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.7;
}

/* ── About ───────────────────────────────────────────── */

#about {
  border-top: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-top: 60px;
}

.about-text p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 18px;
  font-size: 16px;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-text strong {
  color: var(--text);
  font-weight: 600;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.stat-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color var(--transition);
}

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

.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--blue-light);
  letter-spacing: -1px;
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ── Demos ───────────────────────────────────────────── */

#demos {
  border-top: 1px solid var(--border);
}

.demos-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 52px;
  gap: 24px;
}

.demos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.demo-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all 0.25s ease;
  opacity: 0;
  transform: translateY(16px);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.demo-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.demo-card:hover {
  border-color: rgba(37, 99, 235, 0.4);
  background: var(--bg-3);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(37, 99, 235, 0.1);
}

.demo-card:hover::before {
  opacity: 1;
}

.demo-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.demo-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
}

.demo-card-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
}

.demo-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.demo-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  background: rgba(37, 99, 235, 0.1);
  color: var(--blue-light);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 100px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: lowercase;
}

.demo-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--blue-light);
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  transition: gap var(--transition), color var(--transition);
}

.demo-card:hover .demo-link {
  gap: 8px;
  color: #fff;
}

.demos-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 0;
  color: var(--text-dim);
  font-size: 15px;
}

/* ── Contact ─────────────────────────────────────────── */

#contact {
  border-top: 1px solid var(--border);
}

.contact-inner {
  max-width: 600px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 40px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  color: var(--text);
  font-weight: 500;
  font-size: 15px;
  transition: all var(--transition);
}

.contact-link:hover {
  border-color: rgba(37, 99, 235, 0.4);
  background: var(--bg-3);
  color: var(--text);
  transform: translateX(4px);
}

.contact-link-icon {
  width: 36px;
  height: 36px;
  background: rgba(37, 99, 235, 0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.contact-link-label {
  flex: 1;
}

.contact-link-label small {
  display: block;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 400;
  margin-top: 1px;
}

.contact-link-arrow {
  color: var(--text-dim);
  font-size: 18px;
  transition: color var(--transition);
}

.contact-link:hover .contact-link-arrow {
  color: var(--blue-light);
}

/* ── Footer ──────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-dim);
}

.footer-domain {
  font-size: 13px;
  color: var(--text-dim);
  font-weight: 500;
}

/* ── Animations ──────────────────────────────────────── */

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ──────────────────────────────────────── */

@media (max-width: 768px) {
  section {
    padding: 72px 0;
  }

  .nav-links {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  .demos-header {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 36px;
  }

  .demos-grid {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr;
  }
}