:root {
  --yellow: #ffc800;
  --yellow-dark: #e6b400;
  --ink: #0f1419;
  --ink-2: #1b232c;
  --text: #2a3440;
  --muted: #667380;
  --line: #e4e8ec;
  --bg: #ffffff;
  --bg-soft: #f5f7f9;
  --radius: 14px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Roboto", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(15, 20, 25, .96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.header .wrap { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand svg { height: 30px; width: auto; }
.brand-tag {
  font-size: 13px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--yellow); font-weight: 500; padding-left: 12px;
  border-left: 1px solid rgba(255, 255, 255, .25);
}
.nav { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
.nav a {
  color: #d5dbe1; font-size: 14px; font-weight: 500;
  padding: 8px 12px; border-radius: 8px; transition: .15s;
}
.nav a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.nav a.cta { background: var(--yellow); color: var(--ink); }
.nav a.cta:hover { background: var(--yellow-dark); }

/* Hero */
.hero {
  background:
    radial-gradient(900px 400px at 85% -10%, rgba(255, 200, 0, .22), transparent 60%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
  color: #fff;
  padding: 88px 0 96px;
}
.eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--yellow); font-weight: 500; margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(36px, 5.5vw, 62px); line-height: 1.08;
  margin: 0 0 20px; font-weight: 500; letter-spacing: -.02em; max-width: 780px;
}
.hero p.lead { font-size: 20px; color: #bfc8d1; max-width: 640px; margin: 0 0 40px; font-weight: 300; }

/* Version picker */
.picker {
  display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius);
  padding: 20px; max-width: 760px;
}
.field { display: flex; flex-direction: column; gap: 6px; flex: 1 1 260px; }
.field label {
  font-size: 12px; letter-spacing: .08em; text-transform: uppercase;
  color: #9fabb7; font-weight: 500;
}
.select-wrap { position: relative; }
.select-wrap::after {
  content: ""; position: absolute; right: 16px; top: 50%;
  width: 8px; height: 8px; margin-top: -6px;
  border-right: 2px solid var(--ink); border-bottom: 2px solid var(--ink);
  transform: rotate(45deg); pointer-events: none;
}
.select-wrap select {
  width: 100%; appearance: none; -webkit-appearance: none;
  font: inherit; font-size: 16px; font-weight: 500; color: var(--ink);
  background: #fff; border: 2px solid transparent; border-radius: 10px;
  padding: 13px 44px 13px 16px; cursor: pointer; transition: .15s;
}
.select-wrap select:hover { border-color: var(--yellow); }
.select-wrap select:focus-visible { outline: none; border-color: var(--yellow); box-shadow: 0 0 0 4px rgba(255, 200, 0, .3); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 500; font-size: 16px; cursor: pointer;
  background: var(--yellow); color: var(--ink); border: 0;
  border-radius: 999px; padding: 14px 28px; transition: .15s;
}
.btn:hover { background: var(--yellow-dark); transform: translateY(-1px); }

.picker-note { margin: 14px 0 0; font-size: 14px; color: #9fabb7; }
.picker-note a { color: var(--yellow); text-decoration: underline; text-underline-offset: 3px; }

/* Sections */
section.block { padding: 80px 0; }
section.soft { background: var(--bg-soft); }
.section-head { margin-bottom: 40px; max-width: 680px; }
.section-head h2 {
  font-size: clamp(28px, 3.4vw, 40px); line-height: 1.15; color: var(--ink);
  margin: 0 0 12px; font-weight: 500; letter-spacing: -.01em;
}
.section-head p { margin: 0; color: var(--muted); font-size: 18px; font-weight: 300; }
.badge {
  display: inline-block; vertical-align: middle; margin-left: 10px;
  font-size: 14px; font-weight: 500; color: var(--ink);
  background: var(--yellow); border-radius: 999px; padding: 2px 12px;
}

/* Cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 24px; }
.card {
  display: flex; flex-direction: column; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(15, 20, 25, .12); border-color: transparent; }
.card-img { height: 150px; background-size: cover; background-position: center; background-color: var(--ink-2); }
.card-body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card h3 { margin: 0; font-size: 20px; color: var(--ink); font-weight: 500; }
.card p { margin: 0; color: var(--muted); font-size: 15px; flex: 1; }
.card .more { margin-top: auto; padding-top: 8px; font-weight: 500; font-size: 14px; color: var(--ink); }
.card .more::after { content: " \2192"; color: var(--yellow-dark); transition: .15s; display: inline-block; }
.card:hover .more::after { transform: translateX(4px); }

/* Info band */
.band {
  background: var(--ink); color: #fff; border-radius: var(--radius);
  padding: 36px 40px; display: flex; gap: 24px; align-items: center;
  justify-content: space-between; flex-wrap: wrap;
}
.band h3 { margin: 0 0 4px; font-size: 22px; font-weight: 500; }
.band p { margin: 0; color: #bfc8d1; font-weight: 300; }

/* Footer */
.footer { background: var(--ink); color: #9fabb7; padding: 32px 0; font-size: 14px; }
.footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a { color: #fff; text-decoration: underline; text-underline-offset: 3px; }

/* Documentation pages */
.header .brand-tag { transition: .15s; }
.header a.brand-tag:hover { color: #fff; }
.header .ver { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.header .ver label {
  font-size: 12px; letter-spacing: .08em; text-transform: uppercase;
  color: #9fabb7; font-weight: 500;
}
.header .ver .select-wrap { min-width: 170px; }
.header .ver .select-wrap select { background: #252f3a; color: #fff; border: 1px solid rgba(255, 255, 255, .22); }
.header .ver .select-wrap select:hover, .header .ver .select-wrap select:focus-visible { border-color: var(--yellow); }
.header .ver .select-wrap select option, .header .ver .select-wrap select optgroup { background: #fff; color: var(--ink); }
.header .ver .select-wrap::after { border-color: #fff; }
.header .ver .select-wrap select { padding: 8px 38px 8px 14px; font-size: 14px; border-radius: 8px; }
.header .ver .select-wrap::after { right: 14px; margin-top: -5px; width: 7px; height: 7px; }

.subnav { background: var(--ink-2); border-bottom: 1px solid rgba(255, 255, 255, .06); }
.subnav .wrap { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; }
.subnav .wrap::-webkit-scrollbar { display: none; }
.subnav a {
  flex: none; color: #bfc8d1; font-size: 14px; font-weight: 500;
  padding: 13px 14px; border-bottom: 3px solid transparent; transition: .15s;
}
.subnav a:hover { color: #fff; }
.subnav a.active { color: #fff; border-bottom-color: var(--yellow); }

.doc-main { min-height: 60vh; padding: 48px 0 72px; }
.doc-main .doc { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.doc-main .doc > :not(.grid) { max-width: 900px; }
.doc-main .doc > .grid { margin-top: 32px; }

@media (max-width: 860px) {
  .header .ver { margin-left: auto; }
  .header .ver label { display: none; }
  .header .ver .select-wrap { min-width: 140px; }
  .header .wrap { flex-wrap: nowrap; }

  .brand-tag { display: none; }
  .header .wrap { height: auto; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; }
  .nav { margin-left: 0; justify-content: flex-start; }
  .hero { padding: 56px 0 64px; }
  section.block { padding: 56px 0; }
}