/* Semestra content hub — standalone static pages (served directly by Vercel,
   not part of the Expo SPA bundle). Fixed dark palette to match the marketing
   site (see MarketingChrome MK tokens). */
:root {
  --bg: #09090b;
  --bg-alt: #121214;
  --surface: #161618;
  --border: #2a2e40;
  --text: #f4f4f5;
  --dim: #a1a1aa;
  --primary: #7b83eb;
  --primary2: #a855f7;
  --gold: #fbbf24;
  --maxw: 720px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.7;
  font-size: 18px;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  background: rgba(9, 9, 11, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(42, 46, 64, 0.6);
}
.nav .brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--text); }
.nav .brand:hover { text-decoration: none; }
.nav .brand img { width: 26px; height: 26px; }
.nav .cta {
  background: var(--primary); color: #fff; font-weight: 700; font-size: 14px;
  padding: 9px 16px; border-radius: 999px;
}
.nav .cta:hover { text-decoration: none; opacity: 0.9; }

/* Layout */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
main { padding: 40px 0 24px; }

/* Article hero image (relevant SVG illustration up top) */
.article-hero { max-width: var(--maxw); margin: 24px auto 4px; padding: 0 20px; }
.article-hero svg,
.article-hero img { width: 100%; height: auto; display: block; border-radius: 18px; }

/* Branded category banner — the default header the weekly routine adds to every
   new article (it can't draw bespoke diagrams). Just set .banner-label text. */
.article-banner { max-width: var(--maxw); margin: 24px auto 4px; padding: 0 20px; }
.banner-inner {
  height: 150px; border-radius: 18px; display: flex; align-items: center;
  padding: 0 30px; overflow: hidden;
  background:
    radial-gradient(rgba(255, 255, 255, 0.14) 1.5px, transparent 1.7px) 0 0 / 24px 24px,
    linear-gradient(135deg, #6d5df6 0%, #8b5cf6 55%, #4c1d95 100%);
}
.banner-label {
  color: #fff; font-size: 1.9rem; font-weight: 800; letter-spacing: -0.01em;
  line-height: 1.1; text-shadow: 0 1px 12px rgba(0, 0, 0, 0.18);
}
@media (max-width: 600px) {
  .banner-inner { height: 120px; padding: 0 22px; }
  .banner-label { font-size: 1.4rem; }
}

/* Article typography */
article h1 { font-size: 2.1rem; line-height: 1.2; margin: 12px 0 8px; letter-spacing: -0.02em; }
article h2 { font-size: 1.4rem; margin: 40px 0 10px; letter-spacing: -0.01em; }
article h3 { font-size: 1.12rem; margin: 26px 0 6px; }
article p, article li { color: #e4e4e7; }
article ul, article ol { padding-left: 22px; }
article li { margin: 6px 0; }
.meta { color: var(--dim); font-size: 0.92rem; margin-bottom: 8px; }
.lede { font-size: 1.18rem; color: var(--dim); margin: 0 0 8px; }
.eyebrow { color: var(--gold); font-weight: 700; font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; }
blockquote {
  margin: 24px 0; padding: 14px 20px; border-left: 3px solid var(--primary);
  background: var(--surface); border-radius: 0 12px 12px 0; color: var(--dim);
}

/* CTA card */
.cta-card {
  margin: 44px 0 8px; padding: 28px; border-radius: 18px;
  background: linear-gradient(135deg, #6d5df6, #8b5cf6 55%, #4c1d95);
  text-align: center;
}
.cta-card h3 { margin: 0 0 8px; font-size: 1.35rem; color: #fff; }
.cta-card p { margin: 0 0 18px; color: rgba(255, 255, 255, 0.85); }
.cta-card a {
  display: inline-block; background: #fff; color: #4c1d95; font-weight: 800;
  padding: 13px 26px; border-radius: 999px;
}
.cta-card a:hover { text-decoration: none; opacity: 0.92; }

/* Blog index cards */
.hero { padding: 48px 0 8px; }
.hero h1 { font-size: 2.3rem; margin: 0 0 10px; letter-spacing: -0.02em; }
.hero p { color: var(--dim); font-size: 1.15rem; margin: 0; }
.cards { display: grid; gap: 16px; margin: 32px 0; }
.card {
  display: block; padding: 22px; border-radius: 16px;
  background: var(--surface); border: 1px solid var(--border);
}
.card:hover { text-decoration: none; border-color: var(--primary); }
.card h2 { margin: 8px 0 6px; font-size: 1.25rem; color: var(--text); }
.card p { margin: 0; color: var(--dim); font-size: 0.98rem; }

/* Footer */
footer {
  border-top: 1px solid var(--border); margin-top: 48px;
  padding: 28px 0; color: var(--dim); font-size: 0.9rem;
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: center; }
footer a { color: var(--dim); }
.foot-links { display: flex; gap: 18px; flex-wrap: wrap; }

@media (max-width: 600px) {
  body { font-size: 17px; }
  article h1 { font-size: 1.7rem; }
  .hero h1 { font-size: 1.8rem; }
}