:root {
  --navy: #101b2d;
  --navy-2: #16233a;
  --ink: #1c2733;
  --muted: #5b6b7c;
  --line: #dde4ec;
  --bg: #f7f9fb;
  --accent: #2e6fd0;
  --red: #b4372f;
  --green: #2a7d4f;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.55; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }

header { background: var(--navy); color: #fff; }
.nav { display: flex; align-items: baseline; justify-content: space-between; padding: 22px 0; flex-wrap: wrap; gap: 10px; }
.wordmark { font-size: 20px; font-weight: 700; letter-spacing: 0.04em; color: #fff; }
.wordmark span { color: #8fb4e8; }
.wordmark a { color: inherit; }
.wordmark a:hover { text-decoration: none; }
.nav .links { display: flex; gap: 22px; font-size: 14px; }
.nav .links a { color: #cdddf5; }

.hero { padding: 64px 0 72px; }
.hero h1 { font-size: 40px; line-height: 1.15; font-weight: 700; max-width: 720px; }
.hero p.sub { margin-top: 18px; font-size: 19px; color: #b8c6d9; max-width: 660px; }
.hero .cta-row { margin-top: 32px; display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.btn { display: inline-block; background: #fff; color: var(--navy); font-weight: 600; font-size: 16px; padding: 14px 26px; border-radius: 6px; }
.btn:hover { text-decoration: none; opacity: 0.92; }
.btn.ghost { background: transparent; color: #cdddf5; border: 1px solid #3d5273; }
.hero .fine { margin-top: 14px; font-size: 13px; color: #7e91ab; }

section { padding: 56px 0; }
section.alt { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { font-size: 26px; margin-bottom: 8px; }
.lede { color: var(--muted); font-size: 17px; max-width: 700px; margin-bottom: 32px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.step .num { font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: 0.08em; }
.step h3 { font-size: 18px; margin: 6px 0 8px; }
.step p { color: var(--muted); font-size: 15px; }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.stat { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.stat .v { font-size: 26px; font-weight: 700; }
.stat .v.red { color: var(--red); }
.stat .l { font-size: 13px; color: var(--muted); margin-top: 2px; }

.proof { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.proof .note { font-size: 13px; color: var(--muted); margin-top: 14px; }

.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card { display: block; background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 22px; color: var(--ink); }
section.alt .card { background: var(--bg); }
.card:hover { text-decoration: none; border-color: var(--accent); }
.card .tag { font-size: 12px; font-weight: 700; letter-spacing: 0.08em; color: var(--accent); text-transform: uppercase; }
.card h3 { font-size: 17px; margin: 8px 0 6px; }
.card p { font-size: 14px; color: var(--muted); }
.card .amt { margin-top: 10px; font-size: 14px; font-weight: 700; color: var(--red); }

.cta-final { background: var(--navy); color: #fff; text-align: center; padding: 72px 0; }
.cta-final h2 { font-size: 30px; }
.cta-final p { color: #b8c6d9; margin: 14px auto 30px; max-width: 560px; }

footer { padding: 28px 0; font-size: 13px; color: var(--muted); }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* Field-guide article pages */
.post-hero { padding: 44px 0 40px; }
.post-hero .crumb { font-size: 13px; color: #7e91ab; margin-bottom: 14px; }
.post-hero .crumb a { color: #cdddf5; }
.post-hero h1 { font-size: 32px; line-height: 1.2; max-width: 760px; }
.post-hero p.who { margin-top: 12px; font-size: 15px; color: #b8c6d9; }
article { max-width: 760px; margin: 0 auto; padding: 48px 24px 24px; }
article h2 { font-size: 22px; margin: 36px 0 12px; }
article h2:first-child { margin-top: 0; }
article p { margin: 0 0 16px; font-size: 16.5px; }
article ul { margin: 0 0 16px 22px; font-size: 16.5px; }
article li { margin-bottom: 6px; }
article table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 20px 0 24px; background: #fff; border: 1px solid var(--line); }
article th { text-align: left; font-size: 12.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); padding: 10px 14px; border-bottom: 2px solid var(--line); background: #fff; }
article td { padding: 10px 14px; border-bottom: 1px solid var(--line); }
article td.n, article th.n { text-align: right; font-variant-numeric: tabular-nums; }
article tr.hl td { background: #fdf3f2; }
article td .neg { color: var(--red); font-weight: 600; }
article td .pos { color: var(--green); font-weight: 600; }
article .callout { background: #fff; border-left: 4px solid var(--accent); border-radius: 0 8px 8px 0; padding: 16px 20px; margin: 24px 0; font-size: 15.5px; }
article .callout.warn { border-left-color: var(--red); }
article .sample-ref { background: var(--navy); color: #cdddf5; border-radius: 8px; padding: 18px 22px; margin: 28px 0; font-size: 15px; }
article .sample-ref a { color: #fff; font-weight: 600; }
.post-nav { max-width: 760px; margin: 0 auto; padding: 8px 24px 56px; display: flex; justify-content: space-between; gap: 16px; font-size: 14.5px; flex-wrap: wrap; }

@media (max-width: 720px) {
  .hero h1 { font-size: 30px; }
  .post-hero h1 { font-size: 26px; }
  .steps, .proof, .stats, .cards { grid-template-columns: 1fr; }
}