:root {
  --bg: #eef1f5;
  --surface: #ffffff;
  --surface-2: #e3e8ee;
  --ink: #1b2430;
  --ink-muted: #5c6b7a;
  --border: #d2d9e1;
  --chrome: #33465c;
  --chrome-ink: #f3f6fa;
  --accent: #2c5c94;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #10141a; --surface: #171c24; --surface-2: #1e2530;
    --ink: #e7ecf2; --ink-muted: #8ca0b3; --border: #2a3240;
    --chrome: #0d1117; --chrome-ink: #e7ecf2; --accent: #5588c8;
  }
}
:root[data-theme="dark"] {
  --bg: #10141a; --surface: #171c24; --surface-2: #1e2530;
  --ink: #e7ecf2; --ink-muted: #8ca0b3; --border: #2a3240;
  --chrome: #0d1117; --chrome-ink: #e7ecf2; --accent: #5588c8;
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
}

header { background: var(--chrome); color: var(--chrome-ink); padding: 40px 28px 32px; }
header .wrap { max-width: 900px; margin: 0 auto; position: relative; }

.lang-toggle {
  all: unset; cursor: pointer; font-family: "IBM Plex Mono", monospace; font-weight: 600;
  font-size: 0.72rem; padding: 4px 9px; border-radius: 6px; border: 1px solid rgba(255, 255, 255, 0.25);
  color: #cfe0f0; position: absolute; top: 0; right: 0;
}
.lang-toggle:hover { background: rgba(255, 255, 255, 0.08); }
.lang-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
header h1 {
  font-family: "Archivo", system-ui, sans-serif; font-weight: 800; font-size: 1.9rem;
  margin: 0 0 10px; text-wrap: balance;
}
header p { margin: 0; color: #b9c4d1; font-size: 0.94rem; max-width: 62ch; line-height: 1.55; }
header a { color: #cfe0f0; }

main.wrap { max-width: 900px; margin: 0 auto; padding: 32px 28px 48px; }

.eyebrow {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-muted); margin: 0 0 16px;
}

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }

.card {
  display: block; text-decoration: none; color: inherit; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px; padding: 20px;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.card h2 {
  font-family: "Archivo", system-ui, sans-serif; font-weight: 700; font-size: 1.08rem;
  margin: 0 0 8px; color: var(--ink);
}
.card p { margin: 0 0 14px; font-size: 0.86rem; color: var(--ink-muted); line-height: 1.5; }
.card .tags { display: flex; gap: 6px; flex-wrap: wrap; }
.card .tag {
  font-family: "IBM Plex Mono", monospace; font-size: 0.68rem; padding: 2px 7px;
  border-radius: 4px; background: var(--surface-2); color: var(--ink-muted);
}

footer.note {
  max-width: 900px; margin: 0 auto; padding: 20px 28px 40px; font-size: 0.78rem;
  color: var(--ink-muted); border-top: 1px solid var(--border);
}
footer.note a { color: var(--ink-muted); }