:root {
  --bg:      #f6f6f4;
  --surface: #ffffff;
  --ink:     #23241f;
  --ink-2:   #5c5f56;
  --ink-3:   #8a8d83;
  --rule:    #e0e0d8;
  --accent:  #6a7a4f;
  --lock-bg: #efe9d8;
  --lock-fg: #7a6634;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg:      #161714;
    --surface: #1e201c;
    --ink:     #e8e9e2;
    --ink-2:   #a9ac9f;
    --ink-3:   #7c8074;
    --rule:    #2e312a;
    --accent:  #a3b57a;
    --lock-bg: #33301f;
    --lock-fg: #cbb87e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 9vh 1.5rem 6rem;
}

header { margin-bottom: 2.75rem; }

h1 {
  margin: 0 0 .5rem;
  font-size: 1.9rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.sub {
  margin: 0;
  color: var(--ink-2);
  max-width: 34rem;
}

.index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}

.index li { border-bottom: 1px solid var(--rule); }

.index a {
  display: block;
  padding: 1.15rem 1rem 1.15rem .85rem;
  text-decoration: none;
  color: inherit;
  border-left: 3px solid transparent;
  transition: background .15s ease, border-color .15s ease;
}

.index a:hover,
.index a:focus-visible {
  background: var(--surface);
  border-left-color: var(--accent);
  outline: none;
}

.index a:focus-visible { box-shadow: inset 0 0 0 2px var(--accent); }

.name {
  display: block;
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: .15rem;
}

.desc {
  display: block;
  color: var(--ink-2);
  font-size: .95rem;
}

.meta {
  display: block;
  margin-top: .35rem;
  color: var(--ink-3);
  font-size: .8rem;
  font-variant-numeric: tabular-nums;
}

.lock {
  display: inline-block;
  margin-left: .5rem;
  padding: .1em .5em;
  border-radius: 3px;
  background: var(--lock-bg);
  color: var(--lock-fg);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  vertical-align: .12em;
}

footer {
  margin-top: 2.5rem;
  color: var(--ink-3);
  font-size: .85rem;
}
footer p { margin: 0; }

@media (max-width: 30rem) {
  main { padding-top: 6vh; }
  h1 { font-size: 1.6rem; }
}