:root {
  color-scheme: dark;
  --ink: #f7fbff;
  --muted: #9fb1c7;
  --panel: rgba(9, 17, 29, .78);
  --panel-strong: rgba(15, 29, 46, .94);
  --line: rgba(174, 209, 255, .18);
  --cyan: #52e0d5;
  --gold: #f5c35b;
  --rose: #ff6f91;
  --green: #84e68b;
  --bg: #07111d;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    linear-gradient(120deg, rgba(82, 224, 213, .16), transparent 30%),
    linear-gradient(200deg, rgba(245, 195, 91, .12), transparent 35%),
    var(--bg);
  color: var(--ink);
}

a { color: inherit; text-decoration: none; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 14px clamp(20px, 4vw, 56px);
  background: rgba(7, 17, 29, .82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--cyan), var(--gold));
  color: #06111d;
  font-size: 13px;
}

nav { display: flex; flex-wrap: wrap; gap: 18px; color: var(--muted); font-size: 14px; }
nav a:hover { color: var(--ink); }

.hero {
  min-height: min(720px, 76vh);
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(320px, 560px);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(36px, 5vw, 68px) clamp(20px, 5vw, 72px) 34px;
}

.hero-copy { max-width: 760px; }
.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
}

h1, h2, h3 { margin: 0; letter-spacing: 0; line-height: 1.04; }
h1 { font-size: clamp(42px, 4.2vw, 64px); max-width: 760px; }
h2 { font-size: clamp(30px, 4vw, 54px); }
h3 { font-size: 20px; }

.lede {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.65;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
  transition: transform .15s ease, filter .15s ease, border-color .15s ease;
}
.button:hover { transform: translateY(-1px); }
.primary { background: var(--cyan); color: #06111d; }
.primary:hover { filter: brightness(1.06); }
.secondary { border: 1px solid var(--line); color: var(--ink); background: rgba(255,255,255,.04); }
.secondary:hover { border-color: var(--cyan); }
.ghost { border: 1px solid var(--line); color: var(--ink); background: transparent; }
.ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.hero-visual {
  margin: 0;
  min-height: 360px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: rgba(255,255,255,.04);
  box-shadow: 0 30px 90px rgba(0,0,0,.35);
}
.hero-visual img { width: 100%; height: 100%; display: block; object-fit: cover; }

.signal-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 0 clamp(20px, 5vw, 72px);
  border: 1px solid var(--line);
  background: var(--line);
}
.signal-grid div { padding: 24px; background: var(--panel); }
.signal-grid strong { display: block; font-size: 34px; color: var(--gold); }
.signal-grid span { color: var(--muted); }

.section { padding: clamp(58px, 8vw, 110px) clamp(20px, 5vw, 72px); }
.section-heading { max-width: 760px; margin-bottom: 28px; }
.section-heading h2 + p { color: var(--muted); }

.recipes, .use-cases, .doc-grid, .profile-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.recipes article, .use-cases div, .doc-grid a, .profile-grid div, details {
  min-height: 100%;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}
.recipes article span, .profile-grid span, .doc-grid span {
  display: block;
  color: var(--muted);
  margin-top: 10px;
  line-height: 1.55;
}
.recipes p, .use-cases p, .boundary p, details p { color: var(--muted); line-height: 1.6; }
code {
  display: block;
  margin-top: 14px;
  color: var(--green);
  white-space: normal;
  overflow-wrap: anywhere;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, .75fr) minmax(320px, 1.25fr);
  gap: 30px;
  align-items: start;
  background: rgba(82, 224, 213, .06);
}
.terminal {
  margin: 0;
  padding: 22px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #050b12;
  color: #d5f7ef;
  overflow-x: auto;
  line-height: 1.7;
}
.terminal code { margin: 0; white-space: pre; }

.boundary {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 24px;
  background: rgba(245, 195, 91, .06);
}
.boundary ul {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  list-style: none;
}
.boundary li {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

details { margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 800; }

footer {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: space-between;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.not-found main { max-width: 720px; margin: 18vh auto; padding: 24px; }

/* Inline icons */
.i { width: 1.05em; height: 1.05em; display: inline-block; vertical-align: -.16em; flex: none; }

/* Topbar external links */
.topbar-right { display: flex; align-items: center; gap: clamp(14px, 2.4vw, 28px); }
.topbar-links { display: flex; align-items: center; gap: 8px; }
.ext {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, .03);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.ext:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(82, 224, 213, .08); }

/* Hero credibility badges */
.hero-badges { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 0; padding: 0; }
.hero-badges li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}
.hero-badges .i { color: var(--green); }

/* Signal grid icons */
.signal-grid div { display: flex; flex-direction: column; gap: 6px; }
.signal-grid .i { width: 24px; height: 24px; color: var(--cyan); }

/* Card hover polish */
.recipes article, .doc-grid a, .profile-grid div { transition: border-color .15s ease, transform .15s ease; }
.recipes article:hover, .doc-grid a:hover, .profile-grid div:hover { border-color: var(--cyan); transform: translateY(-2px); }

/* Footer links with icons */
footer a { display: inline-flex; align-items: center; gap: 7px; transition: color .15s ease; }
footer a:hover { color: var(--cyan); }

/* Sticky-header offset for in-page anchors */
.section, #top { scroll-margin-top: 84px; }

@media (max-width: 900px) {
  .hero, .split, .boundary { grid-template-columns: 1fr; }
  .recipes, .use-cases, .doc-grid, .profile-grid, .signal-grid { grid-template-columns: 1fr; }
  .topbar { align-items: flex-start; flex-direction: column; }
  .topbar-right { flex-direction: column; align-items: flex-start; gap: 12px; width: 100%; }
  .topbar-links { flex-wrap: wrap; }
  h1 { font-size: 42px; }
}