:root {
  --bg: #f0efe8;
  --bg-warm: #ddd8c8;
  --text: #10151d;
  --muted: #4b5566;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: #ffffff;
  --line: rgba(16, 21, 29, 0.12);
  --accent: #ba3a1b;
  --accent-2: #1f5c4d;
  --shadow: 0 18px 50px rgba(16, 21, 29, 0.11);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 12% 8%, #fff7d7, transparent 42%),
    radial-gradient(circle at 89% 4%, #e2f2ec, transparent 45%),
    linear-gradient(165deg, var(--bg) 0%, var(--bg-warm) 100%);
  line-height: 1.45;
}

.site-backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(16, 21, 29, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 21, 29, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.4), transparent 80%);
  z-index: -1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem max(1.25rem, 4vw);
  background: rgba(240, 239, 232, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header nav {
  display: flex;
  gap: 1rem;
}

.site-header a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-header nav a:hover {
  color: var(--accent);
}

.brand {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 600;
  letter-spacing: 0.02em;
}

main {
  max-width: 1050px;
  margin: 0 auto;
  padding: 3.5rem max(1.25rem, 4vw) 4.5rem;
}

.hero h1 {
  margin: 0.4rem 0 0;
  font-size: clamp(2.1rem, 6vw, 4.35rem);
  line-height: 0.95;
  max-width: 10ch;
}

.eyebrow {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.76rem;
  color: var(--muted);
}

.hero-copy {
  max-width: 62ch;
  margin: 1.1rem 0 0;
  color: var(--muted);
  font-size: 1.06rem;
}

code,
pre {
  font-family: "IBM Plex Mono", monospace;
}

code {
  background: rgba(31, 92, 77, 0.09);
  padding: 0.1rem 0.28rem;
  border-radius: 0.35rem;
}

.cta-row {
  margin-top: 1.45rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.62rem 1rem;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid var(--line);
  transition: transform 130ms ease, box-shadow 130ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(16, 21, 29, 0.12);
}

.btn.primary {
  background: var(--text);
  color: #fff;
  border-color: transparent;
}

.btn.ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.58);
}

.signal-grid {
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.signal-grid li {
  display: grid;
  gap: 0.4rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.58);
}

.signal-grid span {
  color: var(--muted);
  font-size: 0.92rem;
}

.card {
  margin-top: 1.6rem;
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  padding: 1.3rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0;
  font-size: clamp(1.25rem, 3vw, 1.8rem);
}

.card > p {
  margin-top: 0.65rem;
  color: var(--muted);
}

.code-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.code-grid article {
  border-radius: 0.85rem;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--surface-strong);
}

.code-grid h3 {
  margin: 0;
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.96rem;
}

pre {
  margin: 0;
  padding: 0.85rem;
  overflow: auto;
  font-size: 0.8rem;
  line-height: 1.5;
}

.docs-grid {
  margin-top: 1rem;
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.docs-grid a {
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  padding: 0.85rem;
  background: var(--surface-strong);
  transition: border-color 120ms ease, transform 120ms ease;
}

.docs-grid a:hover {
  border-color: rgba(186, 58, 27, 0.48);
  transform: translateY(-2px);
}

.docs-grid h3 {
  margin: 0;
  font-size: 1rem;
}

.docs-grid p {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.site-footer {
  padding: 0 1.25rem 2.2rem;
  text-align: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .signal-grid,
  .code-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.55rem;
  }

  .signal-grid,
  .code-grid,
  .docs-grid {
    grid-template-columns: 1fr;
  }

  main {
    padding-top: 2.6rem;
  }
}