:root {
  --ink: #0f151c;
  --paper: #eef1f4;
  --card: #ffffff;
  --slate: #5d6b79;
  --rule: #d3dae0;
  --accent: #1f6f9c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e4eaf0;
    --paper: #0c1117;
    --card: #141b23;
    --slate: #8b9aa8;
    --rule: #242f3a;
    --accent: #6bb6de;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

header {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 28px;
  margin-bottom: 36px;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 10px;
}

h1 {
  font-family: Newsreader, Georgia, "Times New Roman", serif;
  font-weight: 600;
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1.1;
  margin: 0 0 12px;
  text-wrap: balance;
}

h2 {
  font-family: Newsreader, Georgia, serif;
  font-weight: 600;
  font-size: 22px;
  margin: 36px 0 10px;
}

h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 24px 0 6px;
}

p, li { max-width: 62ch; }
p { margin: 0 0 14px; }
ul { padding-left: 20px; margin: 0 0 14px; }
li { margin-bottom: 6px; }

a { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

.lede { color: var(--slate); font-size: 17px; }

.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 20px 22px;
  margin: 22px 0;
}

.card p:last-child { margin-bottom: 0; }

.updated {
  font-size: 13px;
  color: var(--slate);
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

nav {
  margin-top: 28px;
  display: flex;
  gap: 18px;
  font-size: 15px;
}

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-size: 14px;
  color: var(--slate);
}

/* Email address: shown as selectable text with a copy button, so it is usable
   even where no mail client is configured to handle a mailto: link. */
.mail-address {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.mail-address a { word-break: break-all; }

.copy {
  font: inherit;
  font-size: 13px;
  line-height: 1;
  padding: 5px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper);
  color: var(--slate);
  cursor: pointer;
}

.copy:hover { color: var(--ink); border-color: var(--slate); }
.copy:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.copy.copied { color: var(--accent); border-color: var(--accent); }

/* Language switcher. Hidden until lang.js runs, so that with JavaScript off
   both language blocks simply remain on the page, stacked and readable. */
.langbar {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  margin-bottom: 18px;
}

.langbar[hidden] { display: none; }

.langbar button {
  font: inherit;
  font-size: 13px;
  line-height: 1;
  padding: 6px 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  color: var(--slate);
  cursor: pointer;
}

.langbar button:hover { color: var(--ink); border-color: var(--slate); }
.langbar button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.langbar button[aria-current="true"] {
  background: var(--card);
  color: var(--ink);
  border-color: var(--slate);
  font-weight: 600;
}

/* Without JavaScript both blocks show; a rule keeps them visually separated. */
.langblock + .langblock {
  margin-top: 72px;
  padding-top: 8px;
  border-top: 2px solid var(--rule);
}

.langblock[hidden] { display: none; }

/* When JavaScript has hidden the first block, the second is the only one on
   the page and must not carry a separator. */
.langblock[hidden] + .langblock {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

/* ── Writing ──────────────────────────────────────────────────────────────
   The index of posts. Entries are separated by rules rather than cards, so a
   list of them reads as one column rather than a stack of boxes. */

.entry {
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}

.entry:last-of-type { border-bottom: 0; }

.entry h2 {
  font-size: 21px;
  margin: 2px 0 6px;
}

.entry h2 a {
  color: inherit;
  text-decoration: none;
}

.entry h2 a:hover { color: var(--accent); }

.entry p { margin: 0; color: var(--slate); }

.entry-date {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--slate);
}

/* An article's own prose: slightly larger, since it is the point of the page. */
.langblock > h2 + p,
.langblock > p { font-size: 17px; }

nav a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}