:root {
  --ink: #111226;
  --muted: #62677c;
  --line: #e6e7ef;
  --soft: #f7f7fb;
  --purple: #6842ff;
  --purple-2: #8d72ff;
  --purple-dark: #34228d;
  --cyan: #3dd8f5;
  --pink: #ff4f88;
  --warn: #fff7eb;
  --warn-line: #efc77e;
  --danger: #fff1f1;
  --danger-line: #ef9a9a;
  --success: #eefbf4;
  --success-line: #9ad9b7;
  --shadow: 0 18px 50px rgba(17, 18, 38, .09);
  --radius: 22px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: var(--sans);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--purple-dark); text-decoration-thickness: .08em; text-underline-offset: .18em; }
a:hover { color: var(--purple); }
img { max-width: 100%; height: auto; }
code, pre { font-family: var(--mono); }
code { font-size: .94em; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.muted { color: var(--muted); }
.fineprint { color: var(--muted); font-size: .9rem; }
.eyebrow {
  color: var(--purple-dark);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.nav-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; }
.brand img { width: 50px; height: 50px; object-fit: contain; }
.brand-name { font-size: 1.35rem; font-weight: 850; letter-spacing: -.03em; }
.site-menu { display: flex; align-items: center; gap: 23px; font-size: .95rem; font-weight: 650; }
.site-menu > a:not(.button) { color: #31354b; text-decoration: none; }
.site-menu > a:not(.button):hover { color: var(--purple); }
.nav-toggle { display: none; border: 1px solid var(--line); background: #fff; border-radius: 10px; padding: 8px 12px; font: inherit; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 45px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: var(--ink);
  color: #fff;
  font-weight: 750;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(17,18,38,.10);
}
.button:hover { color: #fff; background: #252744; }
.button-primary { background: linear-gradient(135deg, var(--purple-dark), var(--purple)); }
.button-primary:hover { background: linear-gradient(135deg, #2b1c78, #5933ef); }
.button-ghost { color: var(--ink); background: #fff; border-color: #d9dbe7; box-shadow: none; }
.button-ghost:hover { color: var(--purple-dark); background: #fafaff; border-color: #beb9e8; }
.button-small { min-height: 36px; padding: 0 13px; font-size: .9rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; }

.hero {
  overflow: hidden;
  background:
    radial-gradient(900px circle at 88% 20%, rgba(104,66,255,.16), transparent 56%),
    radial-gradient(700px circle at 12% 20%, rgba(61,216,245,.10), transparent 60%),
    linear-gradient(135deg, #fbfbff 0%, #fff 55%, #f8f7ff 100%);
  border-bottom: 1px solid var(--line);
}
.hero-grid { min-height: 610px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 50px; align-items: center; padding: 62px 0 58px; }
.hero h1 { margin: 12px 0 16px; font-size: clamp(2.25rem, 5vw, 4rem); line-height: .95; letter-spacing: -.058em; max-width: 760px; }
.hero .lede { color: #4e5369; font-size: clamp(1.08rem, 2vw, 1.28rem); max-width: 710px; margin: 0 0 25px; }
.hero-art { position: relative; min-height: 460px; display: grid; place-items: center; }
.hero-art::before { content: ""; position: absolute; inset: 12% 3%; border-radius: 50%; background: radial-gradient(circle, rgba(104,66,255,.20), transparent 66%); filter: blur(9px); }
.hero-art img { position: relative; width: min(500px, 94%); filter: drop-shadow(0 24px 30px rgba(59,34,148,.22)); }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.pill { padding: 7px 11px; border-radius: 999px; background: rgba(104,66,255,.07); border: 1px solid rgba(104,66,255,.16); color: #3f337a; font-size: .88rem; font-weight: 700; }

.section { padding: 78px 0; }
.section-soft { background: var(--soft); border-top: 1px solid #efeff5; border-bottom: 1px solid #efeff5; }
.section-title { margin: 0 0 12px; font-size: clamp(2rem, 4vw, 3.35rem); line-height: 1.05; letter-spacing: -.045em; }
.section-intro { max-width: 760px; color: var(--muted); font-size: 1.07rem; margin: 0 0 34px; }
.cards { display: grid; gap: 18px; }
.two-col { grid-template-columns: repeat(2, minmax(0,1fr)); }
.three-col { grid-template-columns: repeat(3, minmax(0,1fr)); }
.four-col { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 10px 30px rgba(17,18,38,.045);
}
.card h2, .card h3 { margin-top: 0; letter-spacing: -.025em; }
.card p:last-child { margin-bottom: 0; }
.card-accent { border-color: rgba(104,66,255,.22); background: linear-gradient(180deg, #fff, #fbfaff); }
.step-number { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: #ede9ff; color: #4d32c1; font-weight: 850; margin-bottom: 16px; }

.terminal {
  position: relative;
  background: #111520;
  color: #e8ecf4;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 17px;
  padding: 23px;
  box-shadow: 0 18px 44px rgba(17,21,32,.25);
  overflow-x: auto;
}
.terminal pre { margin: 0; white-space: pre-wrap; line-height: 1.75; }
.terminal .prompt { color: #63e6ff; }
.copy-button { position: absolute; top: 12px; right: 12px; border: 1px solid #42495a; color: #d9deea; background: #1e2430; border-radius: 8px; padding: 6px 9px; cursor: pointer; }
.quick-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 26px; align-items: stretch; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #f7f7fb; font-size: .88rem; color: #44495d; }
tr:last-child td { border-bottom: 0; }
.option { font-family: var(--mono); color: #4530a9; font-weight: 700; }

.callout { border-radius: 16px; padding: 18px 20px; border: 1px solid var(--line); margin: 22px 0; }
.callout strong { display: block; margin-bottom: 4px; }
.callout-info { background: #f3f1ff; border-color: #cfc5ff; }
.callout-warning { background: var(--warn); border-color: var(--warn-line); }
.callout-danger { background: var(--danger); border-color: var(--danger-line); }
.callout-success { background: var(--success); border-color: var(--success-line); }

.page-hero { padding: 66px 0 42px; border-bottom: 1px solid var(--line); background: linear-gradient(135deg,#fbfbff,#fff); }
.page-hero h1 { margin: 8px 0 12px; font-size: clamp(2.6rem, 5vw, 4.6rem); letter-spacing: -.055em; line-height: 1; }
.page-hero p { max-width: 760px; color: var(--muted); font-size: 1.1rem; }
.content-grid { display: grid; grid-template-columns: 260px minmax(0,1fr); gap: 42px; align-items: start; }
.toc { position: sticky; top: 96px; border: 1px solid var(--line); border-radius: 16px; padding: 17px; background: #fff; }
.toc strong { display: block; margin-bottom: 8px; }
.toc a { display: block; padding: 5px 0; color: #565b6f; text-decoration: none; font-size: .93rem; }
.toc a:hover { color: var(--purple); }
.prose { min-width: 0; }
.prose h2 { margin: 50px 0 13px; font-size: 2rem; letter-spacing: -.035em; scroll-margin-top: 96px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin: 32px 0 10px; font-size: 1.35rem; scroll-margin-top: 96px; }
.prose p, .prose li { color: #454a5e; }
.prose pre { background: #111520; color: #e8ecf4; border-radius: 14px; padding: 18px; overflow-x: auto; line-height: 1.65; }
.prose code:not(pre code) { background: #f0eff7; border: 1px solid #e2dff2; padding: .08rem .32rem; border-radius: 5px; color: #3e2c9d; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 46px 0; }

.flow { display: grid; grid-template-columns: 1fr 48px 1fr 48px 1fr; align-items: center; margin: 28px 0; }
.flow-box { border: 1px solid #dcd9f4; background: #fbfaff; border-radius: 16px; padding: 20px; min-height: 120px; }
.flow-arrow { text-align: center; font-size: 1.7rem; color: var(--purple); }
.flow-stack { display: grid; gap: 12px; }
.flow-choice { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.flow-choice .flow-box { min-height: 0; }

.compat-tag { display: inline-flex; padding: 4px 8px; border-radius: 999px; font-size: .78rem; font-weight: 750; background: #f0edff; color: #4932b4; }
.article-card h2 { margin-bottom: 7px; }
.article-card h2 a { color: var(--ink); text-decoration: none; }
.text-link { font-weight: 750; text-decoration: none; }

.site-footer { padding: 52px 0 22px; border-top: 1px solid var(--line); background: linear-gradient(180deg,#fff,#f7f6ff); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 13px; }
.footer-brand img { width: 54px; height: 54px; }
.footer-links { list-style: none; padding: 0; margin: 10px 0 0; }
.footer-links li { margin: 6px 0; }
.footer-links a { color: #5c6174; text-decoration: none; }
.footer-bottom { margin-top: 30px; padding-top: 18px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: .88rem; }
.footer-bottom a { color: inherit; }

@media (max-width: 900px) {
  .hero-grid, .quick-grid, .content-grid { grid-template-columns: 1fr; }
  .hero-grid { padding-top: 42px; }
  .hero-art { min-height: 340px; }
  .hero-art img { width: min(410px, 90%); }
  .four-col, .three-col { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .toc { position: static; }
  .flow { grid-template-columns: 1fr; gap: 10px; }
  .flow-arrow { transform: rotate(90deg); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .site-menu { display: none; position: absolute; top: 73px; left: 20px; right: 20px; flex-direction: column; align-items: stretch; gap: 2px; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 12px; box-shadow: var(--shadow); }
  .site-menu.is-open { display: flex; }
  .site-menu a { padding: 9px 10px; }
  .nav-toggle { display: block; }
}

@media (max-width: 620px) {
  .container { width: min(100% - 28px, 1180px); }
  .hero h1 { font-size: 3.15rem; }
  .section { padding: 58px 0; }
  .two-col, .three-col, .four-col, .flow-choice { grid-template-columns: 1fr; }
  .card { padding: 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid > :first-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
}

.adoption-diagram {
  margin: 30px 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fff, #faf9ff);
}
.diagram-node, .diagram-question {
  width: min(560px, 100%);
  margin: 0 auto;
  padding: 15px 18px;
  text-align: center;
  border: 1px solid #d9d5f5;
  border-radius: 14px;
  background: #fff;
}
.diagram-question { background: #f2efff; border-color: #c9c0ff; font-weight: 800; }
.diagram-down { text-align: center; color: var(--purple); font-size: 1.45rem; line-height: 1.35; padding: 3px 0; }
.diagram-branches { display: grid; grid-template-columns: .72fr 1.28fr; gap: 22px; margin-top: 10px; }
.diagram-branch { min-width: 0; }
.diagram-label { display: table; margin: 0 auto; padding: 3px 10px; border-radius: 999px; background: #ece9ff; color: #4932b4; font-size: .8rem; font-weight: 800; }
.diagram-choice-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 10px; }
.diagram-choice-grid .diagram-node { min-height: 112px; display: grid; align-content: center; font-size: .9rem; }
.diagram-good { background: var(--success); border-color: var(--success-line); }
.diagram-warn { background: var(--warn); border-color: var(--warn-line); }
.diagram-bad { background: var(--danger); border-color: var(--danger-line); }
.diagram-source { margin: 18px 0 36px; }
.diagram-source summary { cursor: pointer; color: var(--purple-dark); font-weight: 750; }

@media (max-width: 800px) {
  .diagram-branches, .diagram-choice-grid { grid-template-columns: 1fr; }
}