/* Oswol /learn — shared marketing-grade stylesheet for the content hub.
   Design tokens mirror public/landing.html :root so the hub matches the
   landing page exactly. Generated pages link this file (one cached asset). */

:root {
  --bg-0: #F4F6F7; --bg-1: #FFFFFF; --bg-2: #FAF7EF; --bg-3: #E8DFCA;
  --line: #D8D2C4; --line-soft: rgba(47,62,70,0.10);
  --text-1: #1A1A1A; --text-2: #2F3E46; --text-3: #566A70; --text-4: #7C8C92;
  --gold: #C8AE7D; --gold-2: #D9C49A; --gold-3: #A48F61; --gold-soft: rgba(200,174,125,0.14);
  --up: #7BC4A0; --dn: #E08989;
  --font-display: "IBM Plex Sans", system-ui, sans-serif;
  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --font-ar-display: "IBM Plex Sans Arabic", "IBM Plex Sans", system-ui, sans-serif;
  --font-ar-sans: "IBM Plex Sans Arabic", "IBM Plex Sans", system-ui, sans-serif;
  --ease-out: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(1100px 600px at 18% -10%, rgba(200,174,125,0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 100%, rgba(47,62,70,0.05), transparent 60%),
    linear-gradient(180deg, #F4F6F7 0%, #FAFAF8 55%, #F1ECDE 100%);
  background-attachment: fixed;
  color: var(--text-1);
  font-family: var(--font-sans);
  font-size: 17px; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
[dir="rtl"] body { font-family: var(--font-ar-sans); }
a { color: inherit; }

/* ---- Top bar ---- */
.lrn-top {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 16px clamp(20px, 5vw, 56px);
  background: rgba(244,246,247,0.82); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.lrn-brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.lrn-brand img { width: 30px; height: 30px; }
.lrn-brand b { font-weight: 700; letter-spacing: 0.14em; font-size: 15px; color: var(--text-2); }
.lrn-top__right { display: inline-flex; align-items: center; gap: 8px; }
.lrn-langlink, .lrn-cta {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; text-decoration: none; border-radius: 999px;
  padding: 9px 16px; transition: all 200ms var(--ease-out);
}
.lrn-langlink { color: var(--text-3); border: 1px solid var(--line); }
.lrn-langlink:hover { color: var(--text-1); border-color: var(--gold-3); }
.lrn-cta { color: var(--bg-1); background: var(--text-2); }
.lrn-cta:hover { background: var(--text-1); }

/* ---- Layout ---- */
.lrn-wrap { max-width: 760px; margin: 0 auto; padding: clamp(40px, 7vw, 84px) clamp(20px, 5vw, 40px) 96px; }
.lrn-wrap--wide { max-width: 1040px; }

.lrn-crumb { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-4); margin: 0 0 28px; }
.lrn-crumb a { color: var(--gold-3); text-decoration: none; }
.lrn-crumb a:hover { text-decoration: underline; text-underline-offset: 3px; }

.lrn-eyebrow { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase; color: var(--gold-3); margin: 0 0 14px; }
.lrn-h1 {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(34px, 6vw, 58px); line-height: 1.06; letter-spacing: -0.02em;
  color: var(--text-2); margin: 0 0 18px;
}
[dir="rtl"] .lrn-h1 { font-family: var(--font-ar-display); line-height: 1.25; }
.lrn-lede { font-size: clamp(17px, 2.4vw, 20px); color: var(--text-3); margin: 0 0 14px; max-width: 60ch; }
.lrn-meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-4); margin: 22px 0 0; }
.lrn-meta span + span::before { content: " · "; }

/* ---- Hub grid ---- */
.lrn-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; margin-top: 44px; }
.lrn-card {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--bg-1); border: 1px solid var(--line-soft); border-radius: 16px;
  padding: 26px 24px; text-decoration: none; color: inherit;
  transition: transform 240ms var(--ease-out), border-color 240ms var(--ease-out), box-shadow 240ms var(--ease-out);
}
.lrn-card:hover { transform: translateY(-3px); border-color: var(--gold-3); box-shadow: 0 18px 40px -24px rgba(47,62,70,0.32); }
.lrn-card__cat { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold-3); }
.lrn-card__t { font-family: var(--font-display); font-weight: 600; font-size: 23px; line-height: 1.15; letter-spacing: -0.01em; color: var(--text-2); }
[dir="rtl"] .lrn-card__t { font-family: var(--font-ar-display); line-height: 1.4; }
.lrn-card__d { font-size: 14.5px; color: var(--text-3); margin: 0; }
.lrn-card__more { margin-top: auto; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-1); }

/* ---- Article prose ---- */
.lrn-art { margin-top: 40px; }
.lrn-art h2 { font-family: var(--font-display); font-weight: 600; font-size: clamp(24px, 3.4vw, 32px); line-height: 1.18; color: var(--text-2); margin: 44px 0 14px; letter-spacing: -0.015em; }
[dir="rtl"] .lrn-art h2 { font-family: var(--font-ar-display); line-height: 1.4; }
.lrn-art h3 { font-size: 19px; font-weight: 700; color: var(--text-1); margin: 28px 0 8px; }
.lrn-art p { margin: 0 0 18px; color: var(--text-2); }
.lrn-art ul, .lrn-art ol { margin: 0 0 20px; padding-inline-start: 22px; color: var(--text-2); }
.lrn-art li { margin: 0 0 9px; }
.lrn-art strong { color: var(--text-1); }
.lrn-art a { color: var(--gold-3); text-underline-offset: 3px; }
.lrn-art em { color: var(--text-3); }
.lrn-callout {
  border-inline-start: 3px solid var(--gold); background: var(--gold-soft);
  border-radius: 0 12px 12px 0; padding: 16px 20px; margin: 26px 0; font-size: 15.5px; color: var(--text-2);
}
[dir="rtl"] .lrn-callout { border-radius: 12px 0 0 12px; }

/* ---- In-article FAQ ---- */
.lrn-faq { margin-top: 48px; border-top: 1px solid var(--line); }
.lrn-faq__item { border-bottom: 1px solid var(--line); }
.lrn-faq__q { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 18px; align-items: center; padding: 20px 2px; font-weight: 600; font-size: 17px; color: var(--text-1); }
.lrn-faq__q::-webkit-details-marker { display: none; }
.lrn-faq__q::after { content: "+"; font-family: var(--font-mono); font-size: 22px; color: var(--gold-3); transition: transform 240ms var(--ease-out); }
.lrn-faq__item[open] .lrn-faq__q::after { transform: rotate(45deg); }
.lrn-faq__a { margin: 0; padding: 0 2px 22px; color: var(--text-3); font-size: 15.5px; line-height: 1.75; }

/* ---- End CTA ---- */
.lrn-end {
  margin-top: 56px; padding: 34px clamp(24px, 5vw, 40px); border-radius: 20px;
  background: linear-gradient(150deg, #16242B, #0B1316); color: #fff;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px;
}
.lrn-end__t { font-family: var(--font-display); font-weight: 600; font-size: 25px; line-height: 1.2; letter-spacing: -0.01em; margin: 0; max-width: 30ch; }
[dir="rtl"] .lrn-end__t { font-family: var(--font-ar-display); line-height: 1.5; }
.lrn-end a { background: var(--gold); color: #1A1A1A; text-decoration: none; font-weight: 600; font-family: var(--font-sans); padding: 13px 22px; border-radius: 999px; white-space: nowrap; transition: background 200ms var(--ease-out); }
.lrn-end a:hover { background: var(--gold-2); }

/* ---- Footer ---- */
.lrn-footer { border-top: 1px solid var(--line-soft); padding: 30px clamp(20px, 5vw, 56px); }
.lrn-footer__in { max-width: 1040px; margin: 0 auto; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); }
.lrn-footer a { color: var(--text-2); text-decoration: none; }
.lrn-footer a:hover { color: var(--gold-3); }
.lrn-disclaimer { max-width: 1040px; margin: 0 auto 14px; font-family: var(--font-mono); font-size: 10px; line-height: 1.8; color: var(--text-4); }