:root {
  color-scheme: dark;
  --bg: #0a0c0e;
  --text: #e9eef4;
  --muted: #8b98a8;
  --accent: #3ddc91;
  --card: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(61, 220, 145, 0.12), transparent 55%),
    var(--bg);
  color: var(--text);
}

.hub {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 3.5rem) 0 3rem;
}

.hub-eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.hub-header h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 2.8rem);
  letter-spacing: -0.03em;
}

.hub-lede {
  margin: 0.85rem 0 0;
  max-width: 58ch;
  line-height: 1.6;
  color: var(--muted);
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.hub-card {
  display: grid;
  gap: 0.45rem;
  padding: 1.15rem 1.2rem 1.25rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, transform 0.15s, background 0.15s;
}

.hub-card:hover {
  border-color: rgba(61, 220, 145, 0.35);
  background: rgba(61, 220, 145, 0.06);
  transform: translateY(-2px);
}

.hub-card h2 {
  margin: 0;
  font-size: 1.1rem;
}

.hub-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--muted);
}

.hub-card-icon { font-size: 1.4rem; }

.hub-card-cta {
  margin-top: 0.35rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
}

.hub-archive {
  margin-top: 2.5rem;
  padding: 1.25rem 1.35rem;
  border-radius: 14px;
  border: 1px solid rgba(125, 211, 168, 0.22);
  background: rgba(61, 220, 145, 0.06);
}

.hub-archive h2 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.hub-archive p {
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
  line-height: 1.55;
  color: rgba(233, 238, 244, 0.88);
}

.hub-archive-link {
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.hub-archive-link:hover { text-decoration: underline; }

.hub-footer {
  margin-top: 2.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

.hub-footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.hub-footer-links a:hover { color: var(--text); }