:root {
  --bg: #f5f7fb;
  --text: #101828;
  --muted: #475467;
  --line: #e4e7ec;
  --card: #ffffff;
  --accent: #111827;
  --accent-soft: #f2f4f7;
  --success: #12b76a;
  --max: 1100px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

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

.wrap { width: min(100% - 2rem, var(--max)); margin: 0 auto; }

.site {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.site .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
}
.brand img { width: 32px; height: 32px; border-radius: 8px; object-fit: cover; }

.top {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  color: #344054;
  font-weight: 500;
}

main section { padding: 2.4rem 0; }

.hero {
  text-align: center;
  padding-top: 3.8rem;
}
.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 4rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.hero .lead {
  margin: 1.1rem auto 0;
  max-width: 780px;
  font-size: clamp(1rem, 1.8vw, 1.35rem);
  color: #344054;
  font-weight: 600;
}
.hero .sub {
  margin: 0.9rem auto 0;
  max-width: 840px;
  color: var(--muted);
  font-size: 1.05rem;
}

.eq {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-family: "JetBrains Mono", "IBM Plex Mono", monospace;
  font-size: 0.9rem;
}

.chips {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.2rem;
  color: #344054;
}
.chips span::before {
  content: "\2713";
  color: var(--success);
  margin-right: 0.45rem;
  font-weight: 700;
}

.cta {
  margin-top: 1.4rem;
  display: flex;
  justify-content: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  border: 1px solid #d0d5dd;
  background: #fff;
  border-radius: 0.55rem;
  padding: 0.62rem 1rem;
  font-weight: 600;
}
.btn.primary {
  background: #101828;
  color: #fff;
  border-color: #101828;
}

.code-tabs {
  display: inline-flex;
  justify-content: center;
  gap: 0;
  margin: 2.2rem auto 0;
  background: var(--accent-soft);
  border-radius: 0.5rem;
  padding: 0.25rem;
}
.code-tab {
  background: none;
  border: none;
  padding: 0.45rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  border-radius: 0.35rem;
  transition: color 0.15s, background 0.15s;
}
.code-tab:hover { color: var(--text); }
.code-tab.active {
  color: var(--text);
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.code-tabs ~ .code-wrap {
  margin-top: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

.code-wrap {
  margin: 2.2rem auto 0;
  max-width: 760px;
  background: #0b1220;
  border: 1px solid #1f2a44;
  border-radius: 0.75rem;
  overflow: hidden;
}
.code-run {
  border-top: 1px solid #1f2a44;
  padding: 0.6rem 1rem;
  font-family: "JetBrains Mono", "IBM Plex Mono", monospace;
  font-size: 0.9rem;
  color: #7ee787;
}
.code-run span {
  color: #7d8590;
  margin-right: 0.3rem;
}
.code-run code {
  color: #e8f2ff;
}
.code-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  border-bottom: 1px solid #1f2a44;
  padding: 0.5rem 0.75rem;
  color: #98a2b3;
  font-size: 0.82rem;
}
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot.r { background: #ff5f56; }
.dot.y { background: #ffbd2e; }
.dot.g { background: #27c93f; }

pre {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  color: #e8f2ff;
  font-family: "JetBrains Mono", "IBM Plex Mono", monospace;
  font-size: 0.97rem;
  line-height: 1.65;
  text-align: left;
}

pre code {
  white-space: pre;
  display: block;
}

.tok-kw { color: #7cc4ff; font-weight: 600; }
.tok-ty { color: #7ee787; }
.tok-str { color: #f2cc8f; }
.tok-com { color: #7d8590; font-style: italic; }
.tok-fn { color: #d2a8ff; }
.tok-num { color: #79c0ff; }

.demo {
  margin: 1.6rem auto 0;
  max-width: 760px;
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid #1f2a44;
  background: #0b1220;
}
.demo img {
  display: block;
  width: 100%;
  height: auto;
}
.demo-caption {
  margin: 1.2rem auto 0;
  max-width: 760px;
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}

.section-title {
  text-align: center;
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: -0.02em;
}
.section-sub {
  margin: 0.6rem auto 1.8rem;
  max-width: 760px;
  text-align: center;
  color: #475467;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  padding: 1rem;
}
.card h3 {
  margin: 0;
  font-size: 1.03rem;
}
.card small {
  display: block;
  margin-top: 0.25rem;
  color: #98a2b3;
  font-weight: 600;
}
.card p {
  margin: 0.6rem 0 0;
  color: #475467;
}

.doc-main { padding-bottom: 2rem; }
.doc-main h1 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}
.doc-main h2 { margin-top: 1.7rem; }
.doc-main p, .doc-main li { color: #475467; }
.doc-main ul { padding-left: 1.2rem; }
.doc-main code { color: #0f766e; }

.list { display: grid; gap: 0.8rem; }
.list a {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  padding: 0.9rem;
}
.list strong { display: block; margin-bottom: 0.2rem; }
.list span { color: #667085; }

footer {
  border-top: 1px solid var(--line);
  margin-top: 2.4rem;
  padding: 1.2rem 0 2rem;
  color: #667085;
  text-align: center;
}

.kicker {
  text-transform: uppercase;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

.star-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #344054;
  background: #fff;
  transition: border-color 0.15s;
}
.star-btn:hover {
  border-color: #98a2b3;
  text-decoration: none;
}

@media (max-width: 980px) {
  .grid-3 { grid-template-columns: 1fr; }
  .top { gap: 0.85rem; font-size: 0.95rem; }
}