/* Clicked — shared site chrome.
   Interactives keep their own internal <style>; this only styles the
   landing, library, and the header/footer wrapper around each interactive. */
:root {
  --ink: #1a1a1a;
  --muted: #6b6b6b;
  --line: #d4d4d4;
  --bg: #f7f6f3;
  --panel: #ffffff;
  --ok: #2e7d4f;
  --lock: #9a9a9a;
  --brand: #2f5fa3;       /* calm computing blue */
  --brand-ink: #234a80;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}
a { color: var(--brand-ink); }

/* header / footer */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
  padding: 16px 20px;
}
.brand {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
.brand .dot { color: var(--brand); }
.nav { display: flex; gap: 18px; align-items: center; }
.nav a { font-size: 0.9rem; text-decoration: none; color: var(--ink); }
.nav a:hover { color: var(--brand-ink); }

.site-footer {
  max-width: 960px;
  margin: 48px auto 0;
  padding: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* generic page container */
.page { max-width: 960px; margin: 0 auto; padding: 8px 20px 40px; }

/* landing hero */
.hero { padding: 36px 0 24px; max-width: 640px; }
.hero h1 { font-size: 2.1rem; line-height: 1.15; margin: 0 0 14px; letter-spacing: -0.02em; }
.hero p { font-size: 1.05rem; color: var(--muted); margin: 0 0 24px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  border-radius: 8px;
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid var(--brand);
}
.btn.primary { background: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-ink); border-color: var(--brand-ink); }
.btn.ghost { background: transparent; color: var(--brand-ink); }
.btn.ghost:hover { background: rgba(47,95,163,0.06); }

/* value props */
.props { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 40px 0; }
.prop {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
}
.prop h3 { margin: 0 0 6px; font-size: 1rem; }
.prop p { margin: 0; font-size: 0.9rem; color: var(--muted); }

/* library catalogue */
.section-head { margin: 28px 0 6px; }
.section-head h1 { font-size: 1.5rem; margin: 0 0 6px; }
.section-head p { color: var(--muted); margin: 0; }
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 24px 0;
}
.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  min-height: 140px;
}
.card .topic { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); margin: 0 0 8px; }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0 0 14px; font-size: 0.88rem; color: var(--muted); flex: 1; }
.card .card-cta { font-size: 0.85rem; font-weight: 600; color: var(--brand-ink); }
a.card-link { text-decoration: none; color: inherit; display: block; }
a.card-link:hover .card { border-color: var(--brand); }

.card.free { border-color: var(--ok); }
.badge {
  position: absolute;
  top: 14px; right: 14px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 999px;
}
.badge.free { background: rgba(46,125,79,0.12); color: var(--ok); }
.badge.locked { background: rgba(154,154,154,0.16); color: var(--lock); }
.card.locked { opacity: 0.92; }
.card.locked h3::before { content: "🔒 "; }

/* subscribe stub band */
.subscribe {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  margin: 8px 0 24px;
}
.subscribe h2 { margin: 0 0 8px; font-size: 1.25rem; }
.subscribe p { margin: 0 0 18px; color: var(--muted); }
.price { font-size: 1.6rem; font-weight: 700; }
.price small { font-size: 0.9rem; font-weight: 400; color: var(--muted); }
.stub-note { font-size: 0.75rem; color: var(--muted); margin-top: 14px; }

/* taster banner (shown above an interactive) */
.taster-bar {
  background: rgba(46,125,79,0.08);
  border-bottom: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--ink);
  text-align: center;
  padding: 8px 16px;
}
.taster-bar a { font-weight: 600; }

/* taster footer CTA below an interactive */
.taster-cta {
  max-width: 760px;
  margin: 0 auto 48px;
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  text-align: center;
}
.taster-cta h2 { margin: 0 0 8px; font-size: 1.15rem; }
.taster-cta p { margin: 0 0 16px; color: var(--muted); font-size: 0.92rem; }

@media (max-width: 560px) {
  .props, .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.7rem; }
}