:root {
  --paper: #f1f2f0;
  --ink: #1b1f1d;
  --ink-soft: #4a504c;
  --teal: #2b7a78;
  --rule: #c7cbc6;
}

* { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "IBM Plex Sans", -apple-system, sans-serif;
  line-height: 1.55;
}

a { color: inherit; }

.topbar {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 32px 0;
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.wordmark {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 19px;
}

.role {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  color: var(--ink-soft);
}

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 32px;
}

.hero {
  padding: 56px 0 48px;
  max-width: 640px;
}

.hero h1 {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 40px);
  line-height: 1.15;
  margin: 0 0 16px;
}

.hero-sub {
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 54ch;
  margin: 0;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
  margin-bottom: 64px;
}

.tile {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px 24px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.tile:hover,
.tile:focus-visible {
  background-color: #e7e9e5;
}

.tile-path {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  color: var(--teal);
}

.tile-title {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 20px;
}

.tile-summary {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.tile-tags {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 4px;
}

.tile-open {
  font-size: 14px;
  font-weight: 500;
  margin-top: auto;
  padding-top: 10px;
  text-decoration: underline;
  text-decoration-color: var(--teal);
  text-underline-offset: 3px;
}

footer {
  border-top: 1px solid var(--rule);
  padding: 20px 32px 32px;
}

footer p {
  max-width: 980px;
  margin: 0 auto;
  font-size: 12.5px;
  color: var(--ink-soft);
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}