:root {
  --bg: #faf9f5;
  --surface: #ffffff;
  --surface-2: #f1efe8;
  --ink: #1a1a18;
  --ink-2: #5f5e5a;
  --ink-3: #888780;
  --border: #e3e1d9;
  --accent: #185fa5;
  --accent-bg: #e6f1fb;
  --radius: 8px;
  --max: 1040px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #262624; --surface: #30302e; --surface-2: #3a3a37;
    --ink: #f5f4ef; --ink-2: #b4b2a9; --ink-3: #888780;
    --border: #444441; --accent: #85b7eb; --accent-bg: #0c447c;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font); background: var(--bg); color: var(--ink);
  line-height: 1.65; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }
header.site {
  border-bottom: 0.5px solid var(--border); position: sticky; top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px); z-index: 10;
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-weight: 500; font-size: 17px; display: flex; align-items: center; gap: 8px; color: var(--ink); }
.brand:hover { text-decoration: none; }
nav.top a { color: var(--ink-2); font-size: 14px; margin-left: 1.25rem; }
.hero { text-align: center; padding: 4rem 1.5rem 3rem; }
.badge {
  display: inline-flex; align-items: center; gap: 6px; background: var(--accent-bg);
  color: var(--accent); font-size: 13px; padding: 4px 12px; border-radius: var(--radius);
  margin-bottom: 1.5rem;
}
.hero h1 { font-size: clamp(30px, 5vw, 44px); font-weight: 500; margin: 0 0 1rem; letter-spacing: -0.02em; }
.hero p.lede { font-size: 19px; color: var(--ink-2); max-width: 34rem; margin: 0 auto 2rem; }
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px;
  border-radius: var(--radius); font-size: 15px; border: 0.5px solid var(--border);
  background: var(--surface); color: var(--ink); cursor: pointer;
}
.btn:hover { border-color: var(--ink-3); text-decoration: none; }
.btn.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 2.5rem 0; }
.stat { background: var(--surface-2); border-radius: var(--radius); padding: 1rem 1.25rem; }
.stat .n { font-size: 26px; font-weight: 500; }
.stat .l { font-size: 13px; color: var(--ink-3); }
section { padding: 2rem 0; }
section h2 { font-size: 24px; font-weight: 500; margin: 0 0 0.5rem; }
section p.sec-lede { color: var(--ink-2); margin: 0 0 1.5rem; max-width: 42rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.card {
  background: var(--surface); border: 0.5px solid var(--border); border-radius: 12px;
  padding: 1.25rem; display: block; color: var(--ink);
}
.card:hover { border-color: var(--ink-3); text-decoration: none; }
.card .ico { font-size: 24px; color: var(--accent); }
.card h3 { font-size: 16px; font-weight: 500; margin: 0.75rem 0 0.25rem; }
.card .count { font-size: 13px; color: var(--ink-3); }
.card .desc { font-size: 14px; color: var(--ink-2); margin: 0.5rem 0 0; }
.tier-legend { display: flex; gap: 1.25rem; flex-wrap: wrap; font-size: 13px; color: var(--ink-2); margin: 1rem 0 1.5rem; }
.tier-dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 5px; vertical-align: middle; }
.skill-list { list-style: none; padding: 0; margin: 0; }
.skill-list li { border-bottom: 0.5px solid var(--border); padding: 0.75rem 0; display: flex; align-items: baseline; gap: 10px; }
.skill-list li:last-child { border-bottom: none; }
.skill-name { font-weight: 500; font-size: 15px; }
.skill-slug { font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.pill { font-size: 11px; padding: 2px 8px; border-radius: 20px; white-space: nowrap; }
.pill.A { background: var(--accent-bg); color: var(--accent); }
.pill.A2 { background: #e1f5ee; color: #0f6e56; }
.pill.B { background: var(--surface-2); color: var(--ink-2); }
@media (prefers-color-scheme: dark) { .pill.A2 { background: #085041; color: #9fe1cb; } }
footer.site { border-top: 0.5px solid var(--border); padding: 2rem 0; color: var(--ink-3); font-size: 14px; margin-top: 3rem; }
footer.site .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.callout { background: var(--surface-2); border-radius: 12px; padding: 1.5rem; margin: 1.5rem 0; }
.callout h3 { margin: 0 0 0.5rem; font-size: 17px; font-weight: 500; }
code.inline { font-family: var(--mono); font-size: 13px; background: var(--surface-2); padding: 2px 6px; border-radius: 4px; }
pre { background: var(--surface-2); border-radius: var(--radius); padding: 1rem; overflow-x: auto; font-family: var(--mono); font-size: 13px; }
@media (max-width: 640px) { .stats { grid-template-columns: repeat(2, 1fr); } nav.top a { margin-left: 0.75rem; } }