:root {
  --cream: #F1EBD8;
  --paper: #FAF5E8;
  --paper-2: #EEE6D2;
  --rule: #DFD6C1;
  --muted: #8C8271;
  --ink: #2B2722;
  --ink-soft: #4A443B;
  --accent: #D05C26;
  --accent-dark: #A9451A;
  --radius: 14px;
  --maxw: 940px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Inter, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-dark); text-decoration: none; border-bottom: 1px solid rgba(169, 69, 26, .28); }
a:hover { border-bottom-color: var(--accent-dark); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */
header.site {
  padding: 28px 0 0;
}
.site-nav {
  display: flex; align-items: center; gap: 14px;
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
}
.site-nav .mark { display: flex; align-items: center; gap: 10px; border: 0; }
.site-nav img { width: 34px; height: 34px; border-radius: 8px; display: block; }
.site-nav .name { font-weight: 640; letter-spacing: -.01em; color: var(--ink); font-size: 17px; }
.site-nav .spacer { flex: 1; }
.site-nav a.link { font-size: 15px; color: var(--muted); border: 0; }
.site-nav a.link:hover { color: var(--ink); }

/* ---------- hero ---------- */
.hero { padding: 64px 0 56px; text-align: center; }
.hero img.icon {
  width: 112px; height: 112px; border-radius: 25px; display: block; margin: 0 auto 28px;
  box-shadow: 0 12px 34px rgba(43, 39, 34, .16);
}
h1 {
  font-size: clamp(34px, 5.4vw, 54px);
  line-height: 1.08;
  letter-spacing: -.028em;
  font-weight: 700;
  margin: 0 0 18px;
}
.hero .sub {
  font-size: clamp(18px, 2.3vw, 21px);
  color: var(--ink-soft);
  max-width: 620px;
  margin: 0 auto 34px;
  line-height: 1.5;
}
.cta { display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: center; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 13px 28px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -.005em;
  box-shadow: 0 6px 18px rgba(208, 92, 38, .26);
}
.btn:hover { background: var(--accent-dark); color: #fff; }
.btn.ghost {
  background: transparent; color: var(--ink-soft);
  border: 1px solid var(--rule); box-shadow: none;
}
.btn.ghost:hover { background: var(--paper); color: var(--ink); }
.note { font-size: 14px; color: var(--muted); margin-top: 16px; }

/* ---------- cluster illustration ---------- */
.stack { max-width: 560px; margin: 56px auto 0; position: relative; }
.card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: 0 4px 14px rgba(43, 39, 34, .06);
  text-align: left;
}
.card + .card { margin-top: 10px; }
.card .src { font-size: 12.5px; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); font-weight: 600; }
.card .hl { font-size: 16.5px; font-weight: 600; letter-spacing: -.01em; margin-top: 3px; line-height: 1.35; }
.card.lead { border-color: rgba(208, 92, 38, .38); box-shadow: 0 8px 22px rgba(43, 39, 34, .09); }
.card.lead .src { color: var(--accent-dark); }
.stack .tag {
  display: inline-block; margin-top: 14px;
  font-size: 13px; color: var(--muted);
  background: var(--paper-2); border: 1px solid var(--rule);
  border-radius: 999px; padding: 5px 13px;
}

/* ---------- features ---------- */
section { padding: 64px 0; }
section.alt { background: var(--paper); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
h2 {
  font-size: clamp(26px, 3.4vw, 34px);
  letter-spacing: -.022em; font-weight: 700;
  margin: 0 0 10px;
}
.lede { color: var(--ink-soft); max-width: 640px; margin: 0 0 36px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(258px, 1fr)); gap: 26px 34px; }
.feat h3 { font-size: 17.5px; font-weight: 640; margin: 0 0 6px; letter-spacing: -.012em; }
.feat p { margin: 0; color: var(--ink-soft); font-size: 15.5px; line-height: 1.6; }
.feat .ic {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--paper-2); border: 1px solid var(--rule);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 13px;
}
.feat .ic svg { width: 20px; height: 20px; display: block; fill: var(--accent); }
.feat .ic svg .knock { fill: var(--paper-2); }
section.alt .feat .ic { background: var(--cream); }
section.alt .feat .ic svg .knock { fill: var(--cream); }

/* ---------- doc pages ---------- */
.doc { padding: 48px 0 80px; }
.doc h1 { font-size: clamp(30px, 4.4vw, 42px); margin-bottom: 6px; }
.doc .updated { color: var(--muted); font-size: 14.5px; margin: 0 0 40px; }
.doc h2 { font-size: 23px; margin: 44px 0 12px; letter-spacing: -.018em; }
.doc h3 { font-size: 18px; margin: 30px 0 8px; letter-spacing: -.012em; }
.doc p { color: var(--ink-soft); }
.doc ul { color: var(--ink-soft); padding-left: 22px; }
.doc li { margin-bottom: 9px; }
.doc li strong, .doc p strong { color: var(--ink); font-weight: 640; }
.doc hr { border: 0; border-top: 1px solid var(--rule); margin: 40px 0; }
.callout {
  background: var(--paper); border: 1px solid var(--rule);
  border-left: 3px solid var(--accent); border-radius: 10px;
  padding: 18px 22px; margin: 28px 0;
}
.callout p { margin: 0; color: var(--ink); }
.callout p + p { margin-top: 10px; }

/* ---------- footer ---------- */
footer.site {
  border-top: 1px solid var(--rule);
  padding: 34px 0 56px;
  font-size: 14.5px; color: var(--muted);
}
footer.site .row { display: flex; gap: 20px; flex-wrap: wrap; align-items: center; }
footer.site a { color: var(--muted); border: 0; }
footer.site a:hover { color: var(--ink); }
footer.site .spacer { flex: 1; }

@media (max-width: 560px) {
  body { font-size: 16.5px; }
  .hero { padding: 44px 0 40px; }
  section { padding: 48px 0; }
  footer.site .row { gap: 14px; }
}