/* skill issue — shared stylesheet. System fonts only, no external assets. */
:root {
  --bg: #fbfaf7;
  --fg: #1b1b1f;
  --muted: #5d5d66;
  --line: #e3e1da;
  --card: #ffffff;
  --accent: #b4321f;
  --accent-soft: #fbe9e5;
  --code-bg: #17171c;
  --code-fg: #ececf1;
  --radius: 10px;
  --max: 46rem;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121216; --fg: #e9e9ee; --muted: #a0a0ab; --line: #2a2a31;
    --card: #1a1a20; --accent: #ff7a63; --accent-soft: #3a1e19; --code-bg: #0b0b0e;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 var(--sans);
}
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-top: .9rem; padding-bottom: .9rem; flex-wrap: wrap; }
.brand { font-family: var(--mono); font-weight: 700; font-size: 1.1rem; color: var(--fg); text-decoration: none; letter-spacing: -.02em; }
.brand span { color: var(--accent); }
.site-nav a { color: var(--muted); text-decoration: none; margin-left: 1.1rem; font-size: .95rem; }
.site-nav a:first-child { margin-left: 0; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--fg); }

main { padding: 2.5rem 0 3rem; }
h1 { font-size: clamp(1.8rem, 5vw, 2.5rem); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 1rem; }
h2 { font-size: 1.3rem; margin: 2.2rem 0 .6rem; letter-spacing: -.01em; }
p, ul, ol { margin: 0 0 1rem; }
li { margin-bottom: .35rem; }
.lead { font-size: 1.12rem; color: var(--muted); }
.lead strong { color: var(--fg); }

code { font-family: var(--mono); font-size: .88em; background: var(--accent-soft); padding: .1em .35em; border-radius: 4px; }
.codeblock { position: relative; margin: 0 0 1.2rem; }
pre {
  background: var(--code-bg); color: var(--code-fg); padding: 3.5rem 1.1rem 1rem; border-radius: var(--radius);
  overflow-x: auto; font: 14px/1.55 var(--mono); margin: 0; white-space: pre-wrap; overflow-wrap: anywhere;
}
pre code { background: none; padding: 0; font-size: inherit; color: inherit; }
.copy-btn {
  position: absolute; top: .5rem; right: .5rem; min-height: 44px; min-width: 44px; font: 600 12px var(--sans);
  background: #2c2c34; color: #ececf1; border: 1px solid #44444e; border-radius: 6px; padding: .3rem .6rem; cursor: pointer;
}
.copy-btn:hover { background: #3a3a44; }

.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.5rem 0 1.25rem; }
.filters button {
  font: 500 .9rem var(--sans); color: var(--fg); background: var(--card); border: 1px solid var(--line);
  border-radius: 999px; padding: .4rem .9rem; cursor: pointer;
}
.filters button:hover { border-color: var(--muted); }
.filters button[aria-pressed="true"] { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.no-js .filters { display: none; }

.pattern-list { list-style: none; padding: 0; margin: 0; display: grid; gap: .75rem; }
.pattern-list li { margin: 0; }
.pattern-card {
  display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.1rem; text-decoration: none; color: var(--fg); transition: border-color .15s;
}
.pattern-card:hover { border-color: var(--accent); }
.pattern-card h3 { margin: .25rem 0 .3rem; font-size: 1.08rem; }
.pattern-card p { margin: 0; color: var(--muted); font-size: .95rem; }
.tag {
  display: inline-block; font: 600 .72rem var(--sans); text-transform: uppercase; letter-spacing: .06em;
  color: var(--accent); background: var(--accent-soft); padding: .15rem .5rem; border-radius: 4px; text-decoration: none;
}
.count { color: var(--muted); font-size: .9rem; margin: 0 0 .75rem; }

.breadcrumb { font-size: .9rem; color: var(--muted); margin-bottom: 1rem; }
.breadcrumb a { color: var(--muted); }
.pattern-summary { font-size: 1.1rem; color: var(--muted); }
.callout { border-left: 3px solid var(--accent); background: var(--card); padding: .8rem 1rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 1.5rem 0; }
.callout p:last-child { margin-bottom: 0; }
.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--line); font-size: .95rem; flex-wrap: wrap; }

.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .88rem; }
.site-footer .wrap { padding-top: 1.25rem; padding-bottom: 2rem; }
.site-footer p { margin: 0 0 .4rem; }

@media (max-width: 520px) {
  body { font-size: 16px; }
  main { padding-top: 1.75rem; }
  pre { font-size: 13px; }
  .site-nav a { margin-left: .8rem; }
}