:root {
  color-scheme: light;
  --ink: #162236;
  --muted: #617183;
  --line: #d7e1e4;
  --surface: #ffffff;
  --soft: #f3f7f7;
  --blue: #246a9b;
  --teal: #078c8c;
  --green: #16865c;
  --orange: #dc6f24;
  --navy: #162f52;
  --shadow: 0 18px 48px rgba(22, 34, 54, 0.13);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(180deg, #f9fbfc 0%, #eaf1f2 100%);
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto minmax(220px, 1fr) auto;
  gap: 18px;
  align-items: center;
  border-bottom: 1px solid rgba(215, 225, 228, 0.88);
  padding: 14px clamp(14px, 3vw, 34px);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}
.brand-link, .tabs a, .launch {
  border-radius: 8px;
  font-weight: 850;
  text-decoration: none;
}
.brand-link {
  border: 1px solid var(--line);
  padding: 9px 11px;
  color: var(--navy);
  background: var(--surface);
}
.tabs { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.tabs a { border: 1px solid var(--line); padding: 9px 12px; color: var(--navy); background: var(--soft); }
.eyebrow {
  margin: 0 0 4px;
  color: var(--teal);
  font-size: .75rem;
  font-weight: 850;
  letter-spacing: .08em;
  text-transform: uppercase;
}
h1, h2, h3, p { letter-spacing: 0; }
h1, h2, h3 { margin: 0; line-height: 1.12; }
h1 { font-size: clamp(1.15rem, 2vw, 1.75rem); }
h2 { font-size: clamp(1.55rem, 3vw, 2.35rem); }
h3 { font-size: 1.08rem; }
p { color: var(--muted); line-height: 1.6; }
main { display: grid; gap: 28px; padding: 28px clamp(14px, 3vw, 42px) 48px; }
.overview, .section { width: min(1120px, 100%); margin: 0 auto; }
.overview {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, .8fr);
  gap: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(18px, 3vw, 30px);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.metric-grid, .library, .note-grid { display: grid; gap: 14px; }
.metric-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.metric-grid div, .module-card, .note {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}
.metric-grid div { display: grid; align-content: center; min-height: 108px; padding: 16px; text-align: center; }
.metric-grid strong { color: var(--blue); font-size: 2rem; }
.metric-grid span { color: var(--muted); font-size: .76rem; font-weight: 850; text-transform: uppercase; }
.section { display: grid; gap: 16px; }
.library, .note-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.module-card, .note { display: grid; gap: 13px; align-content: start; padding: 18px; }
.featured-ppe { border-color: rgba(7, 140, 140, .55); box-shadow: 0 14px 34px rgba(7, 140, 140, .12); }
.tag {
  width: fit-content;
  border-radius: 8px;
  padding: 5px 8px;
  color: #0d5c57;
  background: #dff0ee;
  font-size: .73rem;
  font-weight: 850;
  letter-spacing: .06em;
  text-transform: uppercase;
}
dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 0; }
dl div { border: 1px solid var(--line); border-radius: 8px; padding: 9px; background: #fbfcfc; }
dt { color: var(--muted); font-size: .7rem; font-weight: 850; text-transform: uppercase; }
dd { margin: 3px 0 0; overflow-wrap: anywhere; color: var(--ink); font-size: .86rem; font-weight: 750; }
.launch { width: fit-content; padding: 10px 12px; color: #fff; background: var(--navy); }
@media (max-width: 820px) {
  .topbar, .overview, .library, .note-grid { grid-template-columns: 1fr; }
  .tabs { justify-content: flex-start; }
}
@media (max-width: 560px) { .metric-grid, dl { grid-template-columns: 1fr; } }