:root {
  --ink:#111318;
  --paper:#f5f5f7;
  --muted:#626975;
  --line:rgba(0,0,0,.08);
  --card:#ffffff;
  --soft:#ebeef4;
}

* { box-sizing:border-box; }

html { scroll-behavior:smooth; }

body {
  margin:0;
  font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:radial-gradient(circle at 22% 0%, #e8edf5, transparent 36%), var(--paper);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  text-rendering:geometricPrecision;
}

a {
  color:inherit;
  font-weight:800;
  text-decoration:none;
}

a:hover { color:#000; }

main {
  width:min(980px, calc(100% - 40px));
  margin:0 auto;
  padding:42px 0 72px;
}

header,
footer {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  color:var(--muted);
  font-size:14px;
}

nav {
  display:flex;
  flex-wrap:wrap;
  gap:18px;
}

.brand {
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--ink);
}

.mark {
  width:34px;
  height:34px;
  border-radius:14px;
  display:grid;
  place-items:center;
  background:var(--ink);
  color:white;
}

.mark svg {
  width:18px;
  height:18px;
}

.hero {
  margin-top:48px;
  padding:46px;
  border-radius:38px;
  background:var(--card);
  border:1px solid var(--line);
  box-shadow:0 24px 80px rgba(0,0,0,.08);
}

.eyebrow {
  margin:0 0 16px;
  color:#7b8190;
  font-size:13px;
  font-weight:850;
  letter-spacing:.18em;
  text-transform:uppercase;
}

h1 {
  margin:0;
  max-width:850px;
  font-size:clamp(42px, 7vw, 76px);
  line-height:.98;
  letter-spacing:-.06em;
}

h2 {
  margin:42px 0 0;
  font-size:clamp(28px, 4vw, 38px);
  line-height:1.08;
  letter-spacing:-.045em;
}

h3 {
  margin:28px 0 0;
  font-size:22px;
  letter-spacing:-.025em;
}

p,
li {
  color:var(--muted);
  font-size:17px;
  line-height:1.75;
}

.lead {
  max-width:760px;
  margin:24px 0 0;
  font-size:19px;
}

.actions {
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:30px;
}

.btn {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  padding:14px 20px;
  background:var(--ink);
  color:white;
  font-size:15px;
}

.btn.light {
  background:#fff;
  color:var(--ink);
  border:1px solid var(--line);
}

.grid {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:18px;
  margin-top:28px;
}

.tile {
  padding:28px;
  border-radius:28px;
  background:var(--card);
  border:1px solid var(--line);
}

.tile h2,
.tile h3 { margin-top:0; }

.content {
  margin-top:34px;
  padding:44px;
  border-radius:38px;
  background:rgba(255,255,255,.72);
  border:1px solid var(--line);
}

.callout {
  margin-top:34px;
  padding:28px;
  border-radius:28px;
  background:var(--ink);
  color:white;
}

.callout p { color:rgba(255,255,255,.78); }

.callout .btn {
  background:white;
  color:var(--ink);
}

.toc {
  margin-top:28px;
  padding:20px 24px;
  border-radius:24px;
  background:var(--soft);
}

.toc p {
  margin:0 0 8px;
  font-size:14px;
  font-weight:850;
  letter-spacing:.08em;
  text-transform:uppercase;
}

.toc a {
  display:inline-flex;
  margin:7px 12px 0 0;
  color:#4b5563;
  font-size:14px;
}

.guide-list {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:18px;
  margin-top:30px;
}

.guide-card {
  min-height:210px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  padding:28px;
  border-radius:30px;
  background:white;
  border:1px solid var(--line);
  box-shadow:0 20px 60px rgba(0,0,0,.06);
}

.guide-card h2 {
  margin:0;
  font-size:27px;
}

.guide-card p {
  margin:14px 0 24px;
  font-size:16px;
}

.meta {
  margin-top:18px;
  color:#7b8190;
  font-size:14px;
}

footer {
  margin-top:38px;
}

@media (max-width:760px) {
  main { width:min(100% - 30px, 980px); }
  header,
  footer {
    align-items:flex-start;
    flex-direction:column;
  }
  .hero,
  .content {
    padding:30px;
    border-radius:30px;
  }
  .grid,
  .guide-list {
    grid-template-columns:1fr;
  }
}