/* ============================================================
   EverLedge Learn — content hub styles
   ============================================================ */

:root {
  --m-navy:        #131D27;
  --m-navy-soft:   #1A2734;
  --m-navy-700:    #28394A;
  --m-gold:        #C9A84C;
  --m-gold-deep:   #A8893A;
  --m-gold-soft:   #F6EFDC;
  --m-gold-line:   #E7D8A6;
  --m-paper:       #F8F8F6;
  --m-card:        #FFFFFF;
  --m-border:      #E6E4DD;
  --m-border-soft: #EEEDE7;
  --m-ink:         #131D27;
  --m-body:        #444C56;
  --m-muted:       #7A828C;

  --m-shadow-sm: 0 1px 3px rgba(19,29,39,0.05), 0 1px 2px rgba(19,29,39,0.04);
  --m-shadow-md: 0 8px 22px rgba(19,29,39,0.07), 0 1px 3px rgba(19,29,39,0.05);
  --m-shadow-lg: 0 20px 48px rgba(19,29,39,0.11), 0 3px 10px rgba(19,29,39,0.06);

  --m-maxw: 1100px;
  --m-read: 680px;
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--m-body);
  background: var(--m-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { color: var(--m-ink); margin: 0; letter-spacing: -0.02em; font-weight: 600; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }

.wrap { max-width: var(--m-maxw); margin: 0 auto; padding: 0 32px; }

/* ---------- Navy topbar ---------- */
header.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(19,29,39,0.94);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand img { height: 26px; width: auto; display: block; }
.brand .wordmark { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; color: #fff; line-height: 1; }
.brand .wordmark .learn { color: var(--m-gold); font-weight: 500; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-sans); font-size: 14.5px; font-weight: 500; line-height: 1;
  padding: 11px 18px; border-radius: 10px; cursor: pointer; border: 1px solid transparent;
  transition: transform 140ms var(--ease-standard), box-shadow 220ms, background 220ms, border-color 220ms, color 220ms;
  white-space: nowrap;
}
.btn-gold { background: var(--m-gold); color: var(--m-navy); }
.btn-gold:hover { background: #d6b85f; transform: translateY(-1px); box-shadow: var(--m-shadow-md); }
.btn-gold:active { transform: translateY(0); }

/* ---------- Footer ---------- */
footer.foot { background: var(--m-navy); color: rgba(255,255,255,0.6); margin-top: 96px; }
.foot-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 38px 0; flex-wrap: wrap;
}
.foot-inner .copy { font-size: 13.5px; color: rgba(255,255,255,0.55); }
.foot-links { display: flex; gap: 26px; }
.foot-links a { font-size: 13.5px; color: rgba(255,255,255,0.78); transition: color 160ms; }
.foot-links a:hover { color: var(--m-gold); }

/* ---------- Tag ---------- */
.tag { font-size: 11.5px; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; color: var(--m-gold-deep); }

/* ---------- Article cards (index) ---------- */
.card {
  background: var(--m-card); border: 1px solid var(--m-border); border-radius: 14px;
  padding: 28px 26px 24px; display: flex; flex-direction: column; min-height: 232px;
  box-shadow: var(--m-shadow-sm);
  transition: transform 220ms var(--ease-standard), box-shadow 220ms var(--ease-standard), border-color 220ms;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--m-shadow-lg); border-color: var(--m-gold-line); }
.card .tag { margin-bottom: 16px; }
.card h3 { font-size: 20px; line-height: 1.28; letter-spacing: -0.02em; color: var(--m-ink); text-wrap: balance; }
.card .excerpt { font-size: 14.5px; line-height: 1.6; color: var(--m-body); margin-top: 12px; }
.card .foot { margin-top: auto; padding-top: 20px; display: flex; align-items: center; justify-content: space-between; }
.card .read { font-family: var(--font-mono); font-size: 12.5px; color: var(--m-muted); }
.card .arrow { color: var(--m-gold-deep); display: inline-flex; transition: transform 220ms var(--ease-standard); }
.card:hover .arrow { transform: translateX(3px); }
.card .arrow svg { width: 18px; height: 18px; }

/* ---------- Article page ---------- */
.article { padding: 64px 0 0; }
.read-wrap { max-width: var(--m-read); margin: 0 auto; padding: 0 32px; }

.back {
  display: inline-flex; align-items: center; gap: 7px; font-size: 13.5px; font-weight: 500;
  color: var(--m-muted); transition: color 160ms; margin-bottom: 30px;
}
.back:hover { color: var(--m-gold-deep); }
.back svg { width: 15px; height: 15px; }

.article-head h1 { font-size: 38px; line-height: 1.14; letter-spacing: -0.03em; color: var(--m-ink); text-wrap: balance; }
.meta { display: flex; align-items: center; gap: 12px; margin-top: 20px; font-family: var(--font-mono); font-size: 13px; color: var(--m-muted); }
.meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--m-border); }
.meta .cat {
  font-family: var(--font-sans); font-size: 11.5px; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--m-gold-deep);
  background: var(--m-gold-soft); padding: 4px 11px; border-radius: 999px;
}
.rule { border: none; border-top: 1px solid var(--m-border); margin: 36px 0 8px; }

.body { font-size: 18px; line-height: 1.75; color: var(--m-body); }
.body > * + * { margin-top: 26px; }
.body .lede { font-size: 21px; line-height: 1.6; color: var(--m-navy-700); }
.body h2 { font-size: 25px; line-height: 1.25; letter-spacing: -0.02em; color: var(--m-ink); margin-top: 52px; }
.body h3 { font-size: 19px; line-height: 1.35; letter-spacing: -0.01em; color: var(--m-ink); margin-top: 34px; }
.body h2 + p, .body h3 + p, .body h2 + ul, .body h3 + ul { margin-top: 14px; }
.body a { color: var(--m-gold-deep); font-weight: 500; box-shadow: inset 0 -1px 0 var(--m-gold-line); transition: box-shadow 160ms, color 160ms; }
.body a:hover { color: var(--m-navy); box-shadow: inset 0 -2px 0 var(--m-gold); }
.body strong { color: var(--m-ink); font-weight: 600; }
.body ul { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 13px; }
.body ul li { position: relative; padding-left: 26px; }
.body ul li::before { content: ""; position: absolute; left: 4px; top: 12px; width: 6px; height: 6px; border-radius: 50%; background: var(--m-gold); }
.body .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; color: var(--m-navy); }
.body .disclaimer { font-size: 14px; color: var(--m-muted); line-height: 1.6; margin-top: 34px; }

.taper { width: 100%; border-collapse: collapse; margin-top: 8px; border: 1px solid var(--m-border); border-radius: 12px; overflow: hidden; font-size: 15px; }
.taper th, .taper td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--m-border-soft); }
.taper thead th { font-size: 11.5px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--m-muted); background: #FBFBF9; }
.taper td:last-child, .taper th:last-child { text-align: right; }
.taper td.pct { font-family: var(--font-mono); color: var(--m-navy); }
.taper tbody tr:last-child td { border-bottom: none; }

.callout {
  background: var(--m-gold-soft); border: 1px solid var(--m-gold-line); border-radius: 16px;
  padding: 30px 32px; margin: 44px 0; display: flex; align-items: center; gap: 24px;
}
.callout .ic { width: 46px; height: 46px; border-radius: 12px; flex: none; display: grid; place-items: center; background: #fff; color: var(--m-gold-deep); border: 1px solid var(--m-gold-line); }
.callout .ic svg { width: 23px; height: 23px; }
.callout .ct { flex: 1; }
.callout h4 { font-size: 17px; line-height: 1.4; color: var(--m-navy); font-weight: 600; }
.callout p { font-size: 14.5px; line-height: 1.5; color: var(--m-navy-700); margin-top: 5px; }
.callout .btn-gold { flex: none; }

.related { margin-top: 72px; border-top: 1px solid var(--m-border); padding-top: 40px; }
.related .lbl { font-size: 11.5px; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; color: var(--m-muted); }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 24px; }
.rcard {
  background: var(--m-card); border: 1px solid var(--m-border); border-radius: 14px;
  padding: 24px 24px 22px; display: flex; flex-direction: column; box-shadow: var(--m-shadow-sm);
  transition: transform 220ms var(--ease-standard), box-shadow 220ms, border-color 220ms;
}
.rcard:hover { transform: translateY(-3px); box-shadow: var(--m-shadow-lg); border-color: var(--m-gold-line); }
.rcard .tag { margin-bottom: 12px; }
.rcard h3 { font-size: 18px; line-height: 1.3; letter-spacing: -0.02em; color: var(--m-ink); text-wrap: balance; }
.rcard .read { font-family: var(--font-mono); font-size: 12.5px; color: var(--m-muted); margin-top: auto; padding-top: 18px; }

@media (max-width: 980px) {
  .wrap { padding: 0 26px; }
  .article-head h1 { font-size: 32px; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .brand .wordmark { font-size: 15.5px; }
  .btn { padding: 10px 14px; font-size: 13.5px; }
  .foot-inner { flex-direction: column; align-items: flex-start; gap: 18px; padding: 32px 0; }
  .article { padding: 40px 0 0; }
  .read-wrap { padding: 0 20px; }
  .article-head h1 { font-size: 26px; }
  .body { font-size: 17px; }
  .body .lede { font-size: 19px; }
  .body h2 { font-size: 22px; }
  .callout { flex-direction: column; align-items: flex-start; gap: 18px; padding: 26px; }
  .callout .btn-gold { width: 100%; }
  .related-grid { grid-template-columns: 1fr; }
}