/* StratEQ /learn — shared styling for the guide pages. Same design language as
   the app: cream surface, serif headings + sans body, green/gold accents. One
   stylesheet, linked by every article and the hub. */
:root {
  --bg: #fbfbf9; --surface: #ffffff; --ink: #1b1a17; --ink-soft: #3f3e39;
  --muted: #837f75; --line: #ece7db;
  --green: #1b6b52; --green-tint: #e9f3ee; --green-ink: #14523f;
  --gold: #b5822b; --gold-tint: #f7efdd;
  --serif: "Georgia", "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", ui-monospace, "Menlo", monospace;
  --measure: 41rem;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink-soft);
  font-family: var(--sans); font-size: 18px; line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 24px; }

/* Top bar */
.site-nav { position: sticky; top: 0; z-index: 10; background: rgba(251,251,249,0.9);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.site-nav .wrap { display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; }
.wordmark { font-family: var(--serif); font-weight: 700; font-size: 21px; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.wordmark .dot { color: var(--gold); }
.nav-cta { background: var(--green); color: #fff; text-decoration: none; font-weight: 600;
  font-size: 14px; padding: 9px 18px; border-radius: 9px; }
.nav-cta:hover { background: var(--green-ink); }

/* Article shell */
article, .hub { max-width: var(--measure); margin: 0 auto; padding: 8px 24px 40px; }
.crumbs { font-size: 13px; color: var(--muted); margin: 28px 0 14px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--green); text-decoration: underline; }
.eyebrow { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gold); font-weight: 700; }
h1 { font-family: var(--serif); color: var(--ink); font-size: clamp(30px, 5vw, 44px);
  line-height: 1.14; letter-spacing: -0.01em; margin: 10px 0 12px; }
.byline { font-size: 14px; color: var(--muted); margin: 0 0 30px; }
.byline b { color: var(--ink-soft); font-weight: 600; }
h2 { font-family: var(--serif); color: var(--ink); font-size: clamp(22px, 3vw, 28px);
  line-height: 1.25; margin: 40px 0 12px; }
h3 { font-family: var(--sans); color: var(--ink); font-size: 19px; font-weight: 700; margin: 28px 0 8px; }
p { margin: 0 0 18px; }
a { color: var(--green-ink); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { color: var(--green); }
strong { color: var(--ink); font-weight: 700; }
.lede { font-size: 20px; color: var(--ink); }
ul, ol { margin: 0 0 20px; padding-left: 22px; }
li { margin: 0 0 9px; }
li::marker { color: var(--gold); }

/* Example / quote callout */
blockquote { margin: 22px 0; padding: 16px 20px; background: var(--surface);
  border-left: 3px solid var(--gold); border-radius: 0 10px 10px 0; font-family: var(--serif);
  font-size: 18px; color: var(--ink); font-style: italic; }
blockquote p:last-child { margin: 0; }
.aside { font-size: 15px; color: var(--muted); }

/* Table */
.tbl-wrap { overflow-x: auto; margin: 0 0 20px; }
table { border-collapse: collapse; width: 100%; font-size: 15.5px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); }
th { font-family: var(--sans); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); font-weight: 700; }
td:not(:first-child), th:not(:first-child) { font-family: var(--mono); }

/* Figures & visuals */
figure { margin: 26px 0; }
figcaption { font-size: 13px; color: var(--muted); text-align: center; margin-top: 10px; }
.eq { font-family: var(--serif); font-size: clamp(20px, 3.4vw, 27px); color: var(--ink);
  text-align: center; background: var(--green-tint); border: 1px solid #cfe6db; border-radius: 12px; padding: 22px 18px; }
.eq b { color: var(--green-ink); }

/* Four-numbers → verdict diagram */
.flow { display: grid; grid-template-columns: 1fr; gap: 12px; align-items: stretch; }
.flow-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.flow-card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.flow-card b { display: block; color: var(--ink); font-size: 15px; }
.flow-card span { font-size: 13px; color: var(--muted); }
.flow-arrow { text-align: center; color: var(--gold); font-size: 20px; line-height: 1; }
.flow-verdict { background: var(--ink); color: #f3efe6; border-radius: 12px; padding: 16px 18px; text-align: center; font-family: var(--serif); font-size: 17px; }
.flow-verdict b { color: #fff; }

/* Before/after panels */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.split .p-track, .split .p-verdict { border-radius: 12px; padding: 18px; }
.p-track { background: var(--surface); border: 1px solid var(--line); }
.p-track .p-h { font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 700; margin-bottom: 12px; }
.p-bar { height: 9px; border-radius: 5px; background: var(--line); margin: 7px 0; }
.p-bar.a { width: 90%; } .p-bar.b { width: 62%; } .p-bar.c { width: 74%; } .p-bar.d { width: 45%; } .p-bar.e { width: 83%; }
.p-verdict { background: var(--green-tint); border: 1px solid #cfe6db; display: flex; flex-direction: column; justify-content: center; }
.p-verdict .p-h { color: var(--green-ink); }
.p-verdict p { font-family: var(--serif); font-size: 16px; color: var(--ink); margin: 0; font-style: italic; }

/* CTA block */
.cta-block { background: var(--green-tint); border: 1px solid #cfe6db; border-radius: 16px;
  padding: 28px 26px; margin: 44px 0 20px; text-align: center; }
.cta-block h2 { font-size: 24px; margin: 0 0 8px; }
.cta-block p { color: var(--ink-soft); font-size: 16px; margin: 0 0 18px; }
.btn { display: inline-block; background: var(--green); color: #fff; text-decoration: none;
  font-weight: 700; font-size: 16px; padding: 13px 26px; border-radius: 11px; }
.btn:hover { background: var(--green-ink); color: #fff; }
.disclaimer { font-size: 13px; color: var(--muted); margin: 14px 0 0; }

/* Related + footer */
.related { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 24px; }
.related h2 { font-size: 15px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-family: var(--sans); font-weight: 700; margin: 0 0 14px; }
.related a { display: block; color: var(--ink); text-decoration: none; font-weight: 600; margin-bottom: 10px; }
.related a:hover { color: var(--green); }
.related a span { display: block; font-weight: 400; font-size: 14px; color: var(--muted); }
.site-foot { border-top: 1px solid var(--line); margin-top: 24px; }
.site-foot .wrap { padding: 26px 24px 40px; display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; font-size: 13px; color: var(--muted); }
.site-foot a { color: var(--muted); }

/* Hub */
.hub-head { text-align: center; margin: 40px 0 12px; }
.hub-list { display: grid; gap: 16px; margin-top: 30px; }
.hub-card { display: block; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 22px 24px; text-decoration: none; color: inherit; }
.hub-card:hover { border-color: var(--green); }
.hub-card h2 { font-size: 21px; margin: 0 0 6px; }
.hub-card p { color: var(--ink-soft); margin: 0; font-size: 15.5px; }
.hub-card .more { color: var(--green); font-weight: 600; font-size: 14px; margin-top: 10px; display: inline-block; }

@media (max-width: 560px) {
  body { font-size: 17px; }
  .flow-cards, .split { grid-template-columns: 1fr; }
}