/* Learn pages (/learn/...): plain, readable articles in the landing's light
   brand. Self-contained so an article never loads the 120 KB app stylesheet.
   Tokens mirror #landing in styles.css; keep the two in step. */
@font-face { font-family: "Inter Tight"; src: url("/fonts/InterTight-Variable.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "Manrope"; src: url("/fonts/Manrope-Variable.woff2") format("woff2"); font-weight: 200 800; font-display: swap; }

:root {
  --ground: #F4F7F0; --card: #FFFFFF; --ink: #0F2A1D; --ink-mid: #46604B; --ink-dim: #5B7361;
  --rule: #D2DECB; --tint: #E3EED4; --green: #1B7A45; --green-hover: #15633A; --on-green: #FFFFFF;
  --display: "Manrope", "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --body: "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --gutter: clamp(16px, 4vw, 48px);
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--body); font-size: 18px; line-height: 1.65; }
a { color: var(--green); text-underline-offset: 3px; }
a:hover { color: var(--green-hover); }

.l-nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; max-width: 1180px; margin: 0 auto; padding: 18px var(--gutter); }
.l-brand { font-family: var(--display); font-weight: 800; font-size: 21px; color: var(--ink); text-decoration: none; letter-spacing: -.02em; }
.l-brand em { font-style: normal; color: var(--ink-mid); font-weight: 600; }
.l-nav-links { display: flex; align-items: center; gap: 18px; font-size: 15.5px; }
.l-nav-links a { color: var(--ink-mid); text-decoration: none; }
.l-nav-links a:hover { color: var(--ink); }
.l-nav-links a.btn, .l-nav-links a.btn:hover { color: var(--on-green); }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 22px; border-radius: 999px; background: var(--green); color: var(--on-green); font-weight: 600; font-size: 16px; text-decoration: none; white-space: nowrap; }
.btn:hover { background: var(--green-hover); color: var(--on-green); }

.l-main { max-width: 720px; margin: 0 auto; padding: 24px var(--gutter) 72px; }
.l-crumbs { font-size: 14px; color: var(--ink-dim); margin: 0 0 18px; }
.l-crumbs a { color: var(--ink-dim); }
h1 { font-family: var(--display); font-weight: 800; font-size: clamp(34px, 6vw, 52px); line-height: 1.06; letter-spacing: -.028em; margin: 0 0 16px; text-wrap: balance; }
.l-dek { font-size: 20px; line-height: 1.5; color: var(--ink-mid); margin: 0 0 18px; }
.l-byline { font-size: 14.5px; color: var(--ink-dim); margin: 0 0 36px; padding-bottom: 22px; border-bottom: 1px solid var(--rule); }
h2 { font-family: var(--display); font-weight: 800; font-size: clamp(24px, 3.4vw, 30px); line-height: 1.15; letter-spacing: -.02em; margin: 44px 0 12px; }
h3 { font-family: var(--display); font-weight: 700; font-size: 20px; margin: 28px 0 8px; }
p, ul, ol { margin: 0 0 18px; }
li { margin-bottom: 8px; }
strong { font-weight: 650; }

.l-table-wrap { overflow-x: auto; margin: 0 0 22px; }
table { width: 100%; border-collapse: collapse; font-size: 16px; background: var(--card); border: 1px solid var(--rule); border-radius: 12px; overflow: hidden; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-family: var(--display); font-weight: 700; background: var(--tint); }
tr:last-child td { border-bottom: 0; }
td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }

.l-example { background: var(--card); border: 1px solid var(--rule); border-radius: 16px; padding: 20px 22px; margin: 0 0 22px; }
.l-example p:last-child, .l-example ol:last-child { margin-bottom: 0; }
.l-note { font-size: 15.5px; color: var(--ink-dim); border-left: 3px solid var(--rule); padding-left: 14px; }

.l-cta { background: var(--tint); border-radius: 20px; padding: 26px 24px; margin: 44px 0 0; }
.l-cta h2 { margin-top: 0; font-size: 24px; }
.l-cta p { color: var(--ink-mid); }

.l-related { margin-top: 44px; }
.l-related h2 { font-size: 20px; margin: 0 0 10px; }
.l-related ul { list-style: none; padding: 0; }
.l-related li { margin: 0; border-top: 1px solid var(--rule); }
.l-related a { display: block; padding: 12px 0; text-decoration: none; font-weight: 600; }

.l-hub { list-style: none; padding: 0; display: grid; gap: 14px; }
.l-hub a { display: block; background: var(--card); border: 1px solid var(--rule); border-radius: 16px; padding: 18px 20px; text-decoration: none; color: var(--ink); }
.l-hub a:hover { border-color: var(--ink-mid); }
.l-hub strong { display: block; font-family: var(--display); font-size: 19px; margin-bottom: 4px; }
.l-hub span { color: var(--ink-mid); font-size: 16px; }

.l-foot { background: var(--ink); color: #C9D6C6; font-size: 14px; line-height: 1.55; padding: 32px var(--gutter); }
.l-foot-in { max-width: 1180px; margin: 0 auto; display: grid; gap: 12px; }
.l-foot a { color: #EEF3E7; }
.l-foot-links { display: flex; flex-wrap: wrap; gap: 8px 20px; }

@media (max-width: 560px) {
  body { font-size: 17px; }
  .l-nav-links .l-hide-sm { display: none; }
  .btn { padding: 10px 18px; font-size: 15px; }
}