/* ============================================================
   Breaknes — GitHub Pages shared stylesheet
   Slab/Modern: Roboto Slab headings + Inter body
   ============================================================ */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

:root {
  --bg: #f4f3ef;
  --surface: #fffefc;
  --text: #1c1b19;
  --muted: #6b6a66;
  --accent: #a8321c;
  --border: #e4e2dc;
  --chip: #efede8;
  --zebra: #f8f7f4;
  --pre-bg: #f0efe9;
  --shadow: 0 1px 2px rgba(0, 0, 0, .05), 0 10px 26px rgba(0, 0, 0, .05);
  --font-slab: 'Roboto Slab', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --radius: 14px;
}
html[data-theme="dark"] {
  --bg: #0f1013;
  --surface: #17181d;
  --text: #e7e6e2;
  --muted: #9b9a94;
  --accent: #e2674c;
  --border: #2a2b31;
  --chip: #222329;
  --zebra: #1b1c21;
  --pre-bg: #0c0d10;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .35);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.68 var(--font-body);
  -webkit-font-smoothing: antialiased;
  transition: background .25s ease, color .25s ease;
}

h1, h2, h3, .pr-num, .tile-title {
  font-family: var(--font-slab);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .88em;
  background: var(--chip);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 5px;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 24px 90px;
}

/* ---------- theme toggle ---------- */
#themeToggle {
  position: fixed; top: 16px; right: 16px; z-index: 20;
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface); color: var(--text);
  cursor: pointer; display: grid; place-items: center;
  box-shadow: var(--shadow);
  transition: background .25s ease, color .25s ease;
}
#themeToggle svg { width: 20px; height: 20px; }
#themeToggle .icon-sun { display: none; }
html[data-theme="dark"] #themeToggle .icon-sun { display: block; }
html[data-theme="dark"] #themeToggle .icon-moon { display: none; }

/* ---------- top line: crumbs + language switch ---------- */
.topline {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; flex-wrap: wrap;
  font-size: 13.5px; color: var(--muted);
  margin: 0 0 22px;
}
.topline a { color: var(--muted); }
.topline a:hover { color: var(--accent); text-decoration: none; }
.topline .lang { display: inline-flex; gap: 4px; align-items: baseline; }
.topline .lang b { color: var(--text); font-weight: 600; }

/* ---------- page header ---------- */
.page-head { display: flex; gap: 18px; align-items: center; margin-bottom: 6px; }
.logo {
  width: 58px; height: 58px; border-radius: 12px;
  box-shadow: var(--shadow); flex: none;
}
h1 { font-size: 30px; line-height: 1.2; margin: 0; font-weight: 700; }
h1 .sub { color: var(--muted); font-weight: 400; }
.lede { color: var(--muted); margin: 8px 0 0; font-size: 15px; }
.lede b { color: var(--text); font-weight: 600; }
.intro { margin: 18px 0 26px; font-size: 15.5px; max-width: 76ch; }

/* ---------- digest layout: TOC left, articles right ---------- */
.layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 30px;
  align-items: start;
  margin-top: 8px;
}

.toc {
  position: sticky; top: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 12px;
  box-shadow: var(--shadow);
  font-size: 13.5px;
}
.toc h2 {
  font-size: 12px; letter-spacing: .09em; text-transform: uppercase;
  color: var(--muted); margin: 4px 8px 8px;
}
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.toc li { counter-increment: toc; }
.toc li a {
  display: block; padding: 4px 8px; border-radius: 7px;
  color: var(--text); line-height: 1.4;
}
.toc li a::before {
  content: counter(toc, decimal-leading-zero);
  color: var(--accent);
  font-family: var(--font-slab); font-weight: 700;
  font-size: 11.5px; margin-right: 8px;
}
.toc li a:hover {
  background: var(--chip); color: var(--accent); text-decoration: none;
}
.toc li a.active { background: var(--chip); color: var(--accent); }

main.prs { min-width: 0; }

/* ---------- PR cards ---------- */
.pr {
  margin: 26px 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 32px;
  box-shadow: var(--shadow);
  scroll-margin-top: 24px;
}
.pr-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.pr-num { color: var(--accent); font-size: 24px; font-weight: 700; white-space: nowrap; }
.pr-title { font-size: 21px; line-height: 1.3; margin: 0; }
.meta { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 16px; }
.meta span {
  font-size: 12.5px;
  background: var(--chip);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 999px;
  color: var(--muted);
}
.meta .stat { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.essence { font-size: 15.5px; }
.essence b { font-weight: 600; }
.sec {
  font-size: 12.5px; text-transform: uppercase; letter-spacing: .09em;
  color: var(--muted); font-weight: 600;
  margin: 22px 0 8px;
}
ul.changes { margin: 0; padding-left: 20px; }
ul.changes li { margin: 6px 0; }
.issues { margin-top: 16px; font-size: 13.5px; color: var(--muted); }

/* ---------- landing ---------- */
.hero { padding: 18px 0 6px; }
.hero h1 { font-size: 46px; line-height: 1.1; margin: 0 0 10px; }
.hero .tagline {
  font-size: 20px; color: var(--muted);
  margin: 0 0 18px; max-width: 60ch;
}
.hero p.desc { font-size: 16.5px; max-width: 76ch; margin: 0 0 12px; }
.hero p.desc b { font-weight: 600; }

.feat {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin: 30px 0 10px;
}
.feat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.feat-card h3 { font-size: 15px; margin: 0 0 6px; font-weight: 700; }
.feat-card p { font-size: 14px; color: var(--muted); margin: 0; }

.materials { margin-top: 44px; }
.materials h2 {
  font-size: 20px; margin: 0 0 16px;
  display: flex; align-items: baseline; gap: 12px;
}
.materials h2 .hint { font-family: var(--font-body); font-size: 13px; color: var(--muted); font-weight: 400; }

.tiles { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.tile {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
}
.tile .tag {
  align-self: flex-start;
  font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase;
  color: var(--accent);
  background: var(--chip);
  border: 1px solid var(--border);
  padding: 2px 10px; border-radius: 999px;
}
.tile h3 { font-size: 18px; line-height: 1.35; margin: 0; }
.tile p { font-size: 14px; color: var(--muted); margin: 0; }
.tile .tile-meta { font-size: 12.5px; color: var(--muted); }
.tile-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.tile-links a {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--chip);
  color: var(--text);
  font-size: 13.5px; font-weight: 600;
}
.tile-links a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.tile-links a.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.tile-links a.primary:hover { opacity: .88; color: #fff; }

/* ---------- footer ---------- */
footer {
  margin-top: 48px; padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted); font-size: 13.5px;
}
footer .prs { margin-top: 6px; }

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .layout { grid-template-columns: 1fr; }
  .toc { position: static; }
}
@media (max-width: 640px) {
  .wrap { padding: 26px 14px 70px; }
  .pr { padding: 20px 18px; }
  h1 { font-size: 24px; }
  .hero h1 { font-size: 34px; }
  .page-head { gap: 12px; }
  .logo { width: 48px; height: 48px; }
}

/* ---------- documentation pages ---------- */
.doc { margin-top: 24px; min-width: 0; }
.doc > p { margin: 10px 0; }
.doc h2 {
  font-size: 23px; line-height: 1.3;
  margin: 44px 0 12px; padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 20px;
}
.doc h2:first-of-type { margin-top: 6px; }
.doc h3 { font-size: 17px; margin: 28px 0 8px; scroll-margin-top: 20px; }
.doc h4 { font-size: 15px; margin: 20px 0 6px; }
.doc ul, .doc ol { margin: 8px 0; padding-left: 24px; }
.doc li { margin: 5px 0; }
.doc li > ul, .doc li > ol { margin: 4px 0; }
.doc strong { font-weight: 600; }
.doc table {
  border-collapse: collapse; width: 100%;
  margin: 16px 0; font-size: 14px;
}
.doc th, .doc td {
  border: 1px solid var(--border);
  padding: 7px 12px; text-align: left; vertical-align: top;
}
.doc th { background: var(--chip); font-weight: 600; }
.doc tbody tr:nth-child(odd) { background: var(--zebra); }
.doc img {
  max-width: 100%; height: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  margin: 12px 0;
}
.doc pre {
  background: var(--pre-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  overflow-x: auto;
  font-size: 13px; line-height: 1.55;
  margin: 14px 0;
}
.doc pre code {
  background: none; border: none; padding: 0;
  color: var(--text);
  font-size: 13px;
}
.doc blockquote {
  margin: 14px 0; padding: 4px 16px;
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: var(--chip);
  color: var(--muted);
}
.doc blockquote p { margin: 6px 0; }
.doc hr { border: none; border-top: 1px solid var(--border); margin: 26px 0; }
.doc .kbd, .doc kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .85em;
  background: var(--chip);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0 5px;
}
.doc .note {
  font-size: 13px; color: var(--muted);
  margin: 18px 0 4px;
}
.doc .lead { font-size: 16.5px; color: var(--muted); }
@media (max-width: 640px) {
  .doc h2 { font-size: 19px; }
}

/* landing: section labels + clickable tile titles */
.tiles h3.sec, .materials h3.sec { margin: 26px 0 10px; }
.tile h3 a { color: var(--text); text-decoration: none; }
.tile h3 a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }