:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --ink: #142033;
  --muted: #4a5568;
  --line: #d9e2ec;
  --brand: #0b3d5c;
  --brand-2: #1479a8;
  --accent: #0f766e;
  --soft: #e8f3f8;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 40, 70, 0.08);
  --max: 960px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #eef5fa 0%, var(--bg) 220px);
  line-height: 1.6;
}
a { color: var(--brand-2); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--brand); }
.wrap { width: min(100% - 2rem, var(--max)); margin-inline: auto; }
header { padding: 1.25rem 0 0.5rem; }
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}
.brand svg { flex: 0 0 auto; }
.brand-name {
  font-weight: 750;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
}
.brand-tag {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 500;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  margin-top: 0.85rem;
  font-size: 0.92rem;
}
.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a:hover { color: var(--brand); text-decoration: underline; }
.hero { padding: 2.5rem 0 1.5rem; }
.hero-card, .guide-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}
.eyebrow {
  display: inline-block;
  background: var(--soft);
  color: var(--brand);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 650;
  margin-bottom: 0.9rem;
}
h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}
.lede {
  margin: 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.05rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.7rem 1.15rem;
  font-weight: 650;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-primary:hover { background: #082f46; color: #fff; }
.btn-secondary {
  background: #fff;
  color: var(--brand);
  border-color: var(--line);
}
.btn-secondary:hover { border-color: var(--brand-2); color: var(--brand); }
section { padding: 2rem 0; }
h2 {
  margin: 0 0 0.75rem;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}
h3 {
  margin: 1.4rem 0 0.5rem;
  font-size: 1.08rem;
}
.section-intro {
  margin: 0 0 1.25rem;
  color: var(--muted);
  max-width: 40rem;
}
.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem;
  box-shadow: 0 4px 16px rgba(15, 40, 70, 0.04);
}
.card p { margin: 0 0 1rem; color: var(--muted); }
.card p:last-child { margin-bottom: 0; }
.pill {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.55rem;
}
.note {
  background: #fff8eb;
  border: 1px solid #f0dfb8;
  color: #6b5420;
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  font-size: 0.95rem;
  margin: 1rem 0 0;
}
.disclosure, .privacy, .about, .signup, .contact, .prose {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.25rem;
}
.disclosure h2, .privacy h2, .about h2, .signup h2, .contact h2 {
  margin-bottom: 0.55rem;
}
.disclosure p, .privacy p, .about p, .signup p, .contact p {
  margin: 0 0 0.75rem;
  color: var(--muted);
}
.disclosure p:last-child,
.privacy p:last-child,
.about p:last-child,
.signup p:last-child,
.contact p:last-child { margin-bottom: 0; }
.contact ul, .prose ul, .prose ol {
  margin: 0 0 1rem;
  padding-left: 1.1rem;
  color: var(--muted);
}
.contact li, .prose li { margin: 0.35rem 0; }
.prose p {
  margin: 0 0 1rem;
  color: var(--muted);
}
.prose p:last-child { margin-bottom: 0; }
.aff-disclosure {
  background: #fff8eb;
  border: 1px solid #f0dfb8;
  color: #6b5420;
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  margin: 0 0 1.25rem;
}
.guide-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 1.25rem;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 1.25rem 0 0.25rem;
}
footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}
footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  justify-content: space-between;
  align-items: center;
}
nav.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  margin-top: 1.1rem;
  font-size: 0.92rem;
}
nav.toc a { color: var(--muted); text-decoration: none; }
nav.toc a:hover { color: var(--brand); text-decoration: underline; }
.checklist {
  list-style: none;
  padding-left: 0;
}
.checklist li {
  position: relative;
  padding-left: 1.6rem;
  margin: 0.55rem 0;
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid var(--brand-2);
  border-radius: 3px;
}