:root {
  --primary: #0284c7;
  --primary-soft: #e0f2fe;
  --primary-ink: #075985;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --note-bg: #fffbeb;
  --note-border: #fcd34d;
  --note-text: #78350f;
}
html.dark {
  --primary: #38bdf8;
  --primary-soft: #0c4a6e;
  --primary-ink: #e0f2fe;
  --bg: #0b1220;
  --card: #111a2e;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #1e293b;
  --note-bg: #2a2110;
  --note-border: #a16207;
  --note-text: #fde68a;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
a { color: var(--primary); }
.la { line-height: 1; }

/* Top bar */
.topbar { position: sticky; top: 0; z-index: 30; background: var(--card); border-bottom: 1px solid var(--border); }
.topbar-inner { max-width: 1200px; margin: 0 auto; height: 60px; padding: 0 16px; display: flex; align-items: center; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); text-decoration: none; font-size: 18px; }
.brand-mark { width: 36px; height: 36px; border-radius: 10px; background: var(--primary); color: #fff; display: grid; place-items: center; font-size: 22px; }
.brand-sub { font-weight: 500; color: var(--muted); }
.top-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.icon-btn { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border); background: transparent; color: var(--text); display: grid; place-items: center; font-size: 20px; cursor: pointer; }
.icon-btn:hover, .btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-outline { height: 38px; padding: 0 12px; border-radius: 10px; border: 1px solid var(--border); color: var(--text); display: flex; align-items: center; gap: 6px; text-decoration: none; font-size: 14px; }
.btn-outline .la { font-size: 18px; }
.only-mobile { display: none; }

/* Layout */
.layout { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 280px 1fr; gap: 32px; padding: 24px 16px; }
.sidebar { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 100px); overflow-y: auto; padding-right: 4px; }
.search { position: relative; margin-bottom: 16px; }
.search .la { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 18px; }
.search input { width: 100%; height: 42px; padding: 0 12px 0 38px; border-radius: 10px; border: 1px solid var(--border); background: var(--card); color: var(--text); font-size: 15px; }
.search input:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.nav-group { margin-bottom: 14px; }
.nav-group h6 { margin: 0 0 4px; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.nav-group a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--text); text-decoration: none; font-size: 14.5px; }
.nav-group a:hover { background: var(--primary-soft); color: var(--primary-ink); }
.nav-group a.active { background: var(--primary); color: #fff; }
.scrim { display: none; }

/* Content */
.content { min-width: 0; }
.hero { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 28px; margin-bottom: 24px; }
.hero h1 { margin: 0 0 6px; font-size: 28px; }
.hero p { margin: 0; color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 18px; }
.card h3 { margin: 0 0 10px; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.card h3 .la { color: var(--primary); font-size: 22px; }
.card ul { list-style: none; margin: 0; padding: 0; }
.card li a { display: block; padding: 4px 0; text-decoration: none; font-size: 14.5px; }
.card li a:hover { text-decoration: underline; }

.article { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 28px; }
.crumb { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.crumb a { text-decoration: none; }
.article h1 { margin: 0 0 8px; font-size: 26px; line-height: 1.25; }
.article .lead { color: var(--muted); margin: 0 0 20px; }
.article h2 { font-size: 17px; margin: 24px 0 8px; }
.where { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 6px; background: var(--primary-soft); color: var(--primary-ink); border-radius: 10px; padding: 8px 12px; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.open-link { display: inline-flex; align-items: center; gap: 6px; margin-left: 10px; font-size: 14px; font-weight: 600; text-decoration: none; }
ol.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
ol.steps li { counter-increment: step; position: relative; padding: 2px 0 14px 44px; }
ol.steps li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 30px; height: 30px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 700; font-size: 14px; display: grid; place-items: center; }
.note { background: var(--note-bg); border: 1px solid var(--note-border); color: var(--note-text); border-radius: 10px; padding: 12px 14px; margin-top: 16px; display: flex; gap: 10px; }
.note .la { font-size: 20px; margin-top: 2px; }
.ui { font-weight: 600; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 0 6px; white-space: nowrap; }
.related { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--border); }
.related a { display: inline-block; margin: 4px 12px 4px 0; font-size: 14.5px; }
.empty { color: var(--muted); padding: 24px; text-align: center; }

/* Big search on the home page */
.big-search { position: relative; margin-top: 20px; max-width: 680px; }
.big-search > .la { position: absolute; left: 16px; top: 27px; transform: translateY(-50%); font-size: 22px; color: var(--muted); }
.big-search input { width: 100%; height: 54px; padding: 0 16px 0 48px; border-radius: 14px; border: 2px solid var(--border); background: var(--bg); color: var(--text); font-size: 17px; }
.big-search input:focus { outline: none; border-color: var(--primary); background: var(--card); }
.results { display: none; position: absolute; left: 0; right: 0; top: 60px; z-index: 20; background: var(--card); border: 1px solid var(--border); border-radius: 14px; box-shadow: 0 12px 32px rgba(15,23,42,.15); overflow: hidden; }
.results.open { display: block; }
.result { display: flex; gap: 12px; align-items: flex-start; padding: 12px 16px; text-decoration: none; color: var(--text); border-bottom: 1px solid var(--border); }
.result:last-child { border-bottom: 0; }
.result .la { font-size: 22px; color: var(--primary); margin-top: 2px; }
.result strong { display: block; font-size: 15px; }
.result small { display: block; color: var(--muted); font-size: 13px; }
.result:hover, .result.sel { background: var(--primary-soft); }
.result.none { color: var(--muted); font-size: 14px; }
.popular { margin-top: 12px; font-size: 14px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; }
.popular a { background: var(--primary-soft); color: var(--primary-ink); border-radius: 999px; padding: 3px 12px; text-decoration: none; }

/* Screenshots */
.shot { margin: 16px 0 4px; }
.shot img { display: block; width: 100%; border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 4px 16px rgba(15,23,42,.08); cursor: zoom-in; }
.shot figcaption { font-size: 13px; color: var(--muted); margin-top: 6px; text-align: center; }
.lightbox { display: none; position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,.8); padding: 24px; cursor: zoom-out; }
.lightbox.open { display: grid; place-items: center; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 10px; }

.footer { max-width: 1200px; margin: 0 auto; padding: 24px 16px 40px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--border); }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; gap: 0; }
  .only-mobile { display: grid; }
  .hide-sm { display: none; }
  .sidebar { position: fixed; top: 0; left: 0; bottom: 0; width: 300px; max-width: 85vw; max-height: none; background: var(--bg); z-index: 50; padding: 16px; transform: translateX(-100%); transition: transform .2s; }
  .sidebar.open { transform: none; }
  .scrim.open { display: block; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 40; }
  .hero, .article { padding: 20px; }
  .hero h1 { font-size: 23px; }
  .article h1 { font-size: 22px; }
}