:root {
  --bg-0: #0a1214;
  --bg-1: #0f1c1f;
  --bg-2: #15262b;
  --ink: #e8f0f2;
  --ink-muted: #9bb0b6;
  --teal: #2ec4b6;
  --teal-dim: #1a8f86;
  --teal-wash: rgba(46, 196, 182, 0.12);
  --line: rgba(232, 240, 242, 0.12);
  --font-display: "Syne", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 2px;
  --max: 72rem;
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg-0);
  position: relative;
  overflow-x: hidden;
}

a {
  color: var(--teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.2s ease;
}

a:hover {
  color: #7fe8dd;
}

.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(46, 196, 182, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 20%, rgba(26, 80, 90, 0.35), transparent 50%),
    linear-gradient(165deg, var(--bg-0) 0%, var(--bg-1) 45%, #081014 100%);
  animation: bg-drift 18s ease-in-out infinite alternate;
}

.site-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(232, 240, 242, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 240, 242, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 75%);
  pointer-events: none;
}

@keyframes bg-drift {
  from {
    transform: scale(1) translate(0, 0);
  }
  to {
    transform: scale(1.04) translate(-1%, 1%);
  }
}

.site-header,
main,
.site-footer {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.75rem 0 1rem;
  animation: rise 0.7s ease both;
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  letter-spacing: -0.03em;
  color: var(--ink);
}

.site-nav {
  display: flex;
  gap: 1.25rem;
}

.nav-link {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--ink-muted);
}

.nav-link:hover {
  color: var(--teal);
}

.hero {
  padding: 2.5rem 0 2rem;
  max-width: 40rem;
  animation: rise 0.8s ease 0.08s both;
}

.hero-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.85rem, 4.2vw, 2.85rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.hero-lead {
  margin: 0 0 1.75rem;
  color: var(--ink-muted);
  font-size: 0.92rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.15rem;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--teal);
  color: #06201e;
  border-color: var(--teal);
}

.btn-primary:hover {
  background: #7fe8dd;
  color: #041614;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: var(--teal-dim);
  color: var(--teal);
}

.demo-section {
  padding: 1rem 0 3rem;
  animation: rise 0.9s ease 0.16s both;
}

.demo-meta {
  margin-bottom: 1rem;
}

.demo-meta h2 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.demo-meta p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.demo-frame {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-2);
  box-shadow:
    0 0 0 1px rgba(46, 196, 182, 0.06),
    0 24px 48px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

.demo-frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
  opacity: 0.7;
  pointer-events: none;
  z-index: 1;
}

.demo-embed {
  display: block;
  width: 100%;
  height: min(72vh, 720px);
  min-height: 420px;
  border: 0;
  background: #008080;
}

.demo-hint {
  margin: 0.85rem 0 0;
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.site-footer {
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-size: 0.75rem;
  display: grid;
  gap: 0.5rem;
  animation: rise 0.9s ease 0.22s both;
}

.site-footer p {
  margin: 0;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .site-header,
  main,
  .site-footer {
    width: min(100% - 1.5rem, var(--max));
  }

  .hero {
    padding-top: 1.5rem;
  }

  .demo-embed {
    height: 60vh;
    min-height: 360px;
  }

  .site-nav {
    gap: 0.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}