:root{
  --bg:#ffffff;
  --text:#0b0b0b;
  --muted:#6b6b6b;
  --accent:#000;
  --radius:12px;
  --container:1200px;
  --header-height:56px;
  font-family: "Noto Sans", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color-scheme: light;
}
/* add scroll padding so anchored links don't go under fixed header */
html { scroll-padding-top: var(--header-height); }
/* ensure main content starts below sticky header on small screens */
main { padding-top: calc(var(--header-height) + 8px); }
/* Improve heading spacing and prevent overlap */
h1, h2, h3 { line-height:1.15; margin-top:0; margin-bottom:12px; }
/* larger top spacing for section headings when navigated-to */
.section h2 { margin-top:8px; margin-bottom:16px; font-size:20px; }
*{box-sizing:border-box}
html,body{height:100%;margin:0;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.site-header{border-bottom:1px solid #eee;background:transparent;position:sticky;top:0;backdrop-filter:saturate(120%) blur(6px);z-index:40}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.logo{font-weight:700;text-decoration:none;color:var(--text);font-size:16px;letter-spacing:0.2px}
.nav{display:flex;gap:12px;align-items:center}
.nav a{color:var(--text);text-decoration:none;font-weight:500;padding:6px 8px;border-radius:8px}
.nav a.cta{padding:8px 12px;border:1px solid #111;border-radius:10px;background:#000;color:#fff}
.menu-toggle{display:none;background:none;border:0;color:var(--text)}
.mobile-nav{display:none;flex-direction:column;padding:12px;border-top:1px solid #f2f2f2;visibility:hidden;opacity:0;pointer-events:none;transition:opacity .24s ease,visibility .24s step-end, max-height .28s ease, padding .28s ease}
.mobile-nav a{padding:10px 6px;text-decoration:none;color:var(--text)}
.hero{padding:56px 0}
.hero-grid{display:grid;grid-template-columns:1fr 340px;gap:28px;align-items:start}
.hero-copy h1{font-size:36px;margin:0 0 12px;font-weight:700;letter-spacing:-0.6px;line-height:1.05}
.tagline{margin:0 0 18px;color:var(--muted)}
.hero-form{display:flex;gap:10px;margin-bottom:8px}
.hero-form a.primary{display:inline-block;padding:12px 14px;border-radius:10px;background:var(--accent);color:#fff;text-decoration:none;font-weight:600}
.hero-form input{flex:1;padding:12px 14px;border:1px solid #e6e6e6;border-radius:10px;font-size:15px}
button.primary{background:var(--accent);color:#fff;border:0;padding:12px 14px;border-radius:10px;font-weight:600;cursor:pointer}
.small{font-size:13px;color:var(--muted);margin-top:6px}
.hero-card{background:#fff;border:1px solid #f0f0f0;border-radius:12px;padding:16px;box-shadow:0 6px 18px rgba(10,10,10,0.04)}
.card-header{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.dot{width:10px;height:10px;border-radius:50%;background:#000}
.meta{font-size:13px;color:var(--muted)}
.hero-card h3{margin:0 0 6px;font-size:18px}
.muted{color:var(--muted);font-size:14px}
.card-list{padding-left:18px;margin:10px 0}
.card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:8px}
.section{padding:40px 0}
.about .lead{font-size:18px;color:var(--muted);max-width:720px}
.features .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:18px}
.features article{background:#fff;border:1px solid #f3f3f3;padding:18px;border-radius:10px}
.icon{width:28px;height:28px;margin-bottom:8px;display:block;color:var(--text)}
.cohort-list{display:flex;flex-direction:column;gap:12px;margin-top:12px}
.cohort{display:flex;justify-content:space-between;padding:12px;border-radius:10px;border:1px solid #f3f3f3;background:#fff}
.join-grid{display:grid;grid-template-columns:1fr 380px;gap:24px;align-items:center}
.join-form input, .join-form select{width:100%;padding:12px;border:1px solid #eaeaea;border-radius:8px;margin-bottom:10px}
.form-row{display:flex;gap:10px;align-items:center}
.form-row select{flex:1}
.form-row button{flex:0 0 140px}
.site-footer{border-top:1px solid #f0f0f0;padding:16px 0;margin-top:24px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.footer-inner a{color:var(--muted);text-decoration:none;margin-left:8px;font-size:14px}
.links{display:flex;gap:18px;align-items:center}
.links-primary{display:flex;gap:10px;align-items:center}
.primary-link{background:var(--accent);color:#fff;padding:8px 12px;border-radius:10px;font-weight:600;text-decoration:none}
.links-secondary{display:flex;gap:10px;flex-wrap:wrap}
.links-secondary a{color:var(--muted);font-size:13px;padding:6px 8px;border-radius:8px}
@media (max-width:640px){
  :root{ --header-height:56px }
  main { padding-top: calc(var(--header-height) + 6px); }
  .nav{display:none}
  .menu-toggle{display:block}
  .mobile-nav{display:flex;max-height:0;overflow:hidden;visibility:hidden;opacity:0;pointer-events:none;transition:opacity .2s ease,visibility .2s linear, max-height .28s ease, padding .28s ease}
  .mobile-nav.open{max-height:420px;padding:12px 12px 18px;visibility:visible;opacity:1;pointer-events:auto;transition:opacity .2s ease,visibility .2s linear, max-height .28s ease, padding .28s ease}
  .site-header{position:fixed;left:0;right:0;height:var(--header-height);top:0;backdrop-filter:saturate(120%) blur(6px);z-index:60}
  .header-inner{padding:8px 0;align-items:center;height:var(--header-height);display:flex}
  .mobile-nav{position:fixed;left:0;right:0;top:var(--header-height);background:var(--bg);z-index:55;border-top:1px solid #f2f2f2;padding-bottom:18px;max-height:0;overflow:auto}
  .menu-toggle.open{transform:rotate(90deg)}
  .footer-inner{padding-top:10px;flex-direction:column;align-items:flex-start}
  .links{width:100%;justify-content:space-between;gap:12px;flex-wrap:wrap}
  .links-secondary{order:2;width:100%;display:flex;flex-wrap:wrap;gap:8px}
  .links-primary{order:1;display:flex;gap:8px;flex-wrap:wrap}
  .hero-copy h1{font-size:28px;margin-bottom:10px}
  .section{padding-top:28px;padding-bottom:28px}
  .features .grid{gap:14px}
}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:18px}
  .hero-card{order:2}
  .join-grid{grid-template-columns:1fr}
  .features .grid{grid-template-columns:1fr 1fr}
}