/* Üst menü: ana sayfa ve alt sayfalarda aynı çubuk. */
html { scroll-padding-top: 90px; scrollbar-gutter: stable; }
.hd { position: sticky; top: 0; z-index: 15; padding: 12px 16px 0; pointer-events: none; }
.hd-in { display: flex; align-items: center; gap: 6px; width: fit-content; height: 64px; margin: 0 auto; padding: 0 10px; border: 1px solid var(--line-strong); border-radius: 999px; background: rgba(17, 17, 20, .78); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); box-shadow: 0 10px 30px -12px rgba(0, 0, 0, .7); pointer-events: auto; }
.hd-in { transition: background .25s, border-color .25s, box-shadow .25s; }
.hd.is-top .hd-in { border-color: transparent; background: transparent; box-shadow: none; backdrop-filter: none; -webkit-backdrop-filter: none; }
.hd-logo { display: flex; margin-right: 6px; }
.hd-logo img { width: 42px; height: 42px; border-radius: 10px; }
.hd-nav { display: flex; gap: 2px; }
.hd-nav a { min-width: 92px; padding: 6px 14px; text-align: center; border-radius: 999px; font-size: 13px; color: var(--fg3); white-space: nowrap; transition: color .15s, background .15s; }
.hd-nav a:hover { color: var(--fg); }
.hd-nav a.is-active { background: var(--fg); color: var(--bg); }
.hd-dc { display: grid; place-items: center; width: 42px; height: 42px; margin-left: 6px; border-radius: 50%; background: #5865f2; color: #fff; transition: background .15s; }
.hd-dc:hover { background: #4752c4; }
.hd-dc svg { width: 22px; height: 22px; fill: currentColor; }
/* Alt sayfalar ve ana sayfadaki sistem özeti. */
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.sub { padding-block: 48px 0; }
.sub-head { max-width: 760px; margin-bottom: 28px; }
.sub-head h1 { font-size: clamp(30px, 4vw, 44px); line-height: 1.12; }
.sub-crumb { margin: 0 0 14px; font-size: 13px; color: var(--fg3); }
.sub-crumb a { color: var(--fg2); text-decoration: none; }
.sub-crumb a:hover { color: var(--fg); }
.sub-note { margin: 20px 0 0; color: var(--fg3); }
.sub-note a, .art a { color: var(--fg); text-decoration: underline; text-underline-offset: 3px; }
.sub-end { margin-top: 72px; }
.sum-tiles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 24px 0 0; padding: 0; list-style: none; }
.sum-tiles li { display: flex; flex-direction: column; gap: 4px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.sum-tiles b { font-size: 28px; font-weight: 600; letter-spacing: -.02em; }
.sum-tiles span { font-size: 13px; color: var(--fg3); }
.sum-tiles .t3 b { color: var(--v3); }
.sum-tiles .t2 b { color: #8b8ef5; }
/* Ana sayfa: sistemlerin dağılımı tek parça, aralıksız çubukta. */
.dist { display: flex; height: 14px; margin-top: 24px; overflow: hidden; border-radius: 999px; }
.dist .d0 { flex: 95; background: #5b5b66; }
.dist .d1 { flex: 46; background: color-mix(in srgb, var(--v3) 55%, #111); }
.dist .d2 { flex: 53; background: var(--v3); }
.dist .d3 { flex: 43; background: #8b8ef5; }
.dist-leg { display: flex; flex-wrap: wrap; gap: 10px 28px; margin: 16px 0 0; padding: 0; list-style: none; font-size: 14px; color: var(--fg3); }
.dist-leg li { display: flex; align-items: center; gap: 8px; }
.dist-leg i { width: 10px; height: 10px; border-radius: 3px; }
.dist-leg .d0 { background: #5b5b66; }
.dist-leg .d1 { background: color-mix(in srgb, var(--v3) 55%, #111); }
.dist-leg .d2 { background: var(--v3); }
.dist-leg .d3 { background: #8b8ef5; }
.dist-leg b { color: var(--fg); font-weight: 600; }
.sum-link { margin-top: 20px; }
.vs-search { display: block; padding: 12px 12px 0; }
.vs-search input { box-sizing: border-box; width: 100%; height: 42px; padding: 0 14px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--bg); color: var(--fg); font: 15px var(--sans); }
.vs-search input:focus { outline: 2px solid var(--brand); outline-offset: 1px; }
.vs-empty { margin: 0; padding: 24px 16px; text-align: center; color: var(--fg3); }
.vs-empty[hidden] { display: none; }
/* Rehber yazıları */
.art { max-width: 720px; }
.art h1 { font-size: clamp(30px, 4vw, 42px); line-height: 1.15; }
.art .lede-s { margin: 14px 0 0; font-size: 17px; color: var(--fg2); }
.art-body { margin-top: 32px; font-size: 16px; line-height: 1.75; color: var(--fg2); }
.art-body h2 { margin: 40px 0 12px; font-size: 24px; line-height: 1.25; color: var(--fg); }
.art-body h3 { margin: 28px 0 8px; font-size: 18px; color: var(--fg); }
.art-body p { margin: 0 0 16px; }
.art-body ul, .art-body ol { margin: 0 0 16px; padding-left: 22px; }
.art-body li { margin-bottom: 6px; }
.art-body strong { color: var(--fg); font-weight: 600; }
.art-body code { padding: 1px 6px; border: 1px solid var(--line); border-radius: 6px; background: var(--raise); font: 14px var(--mono); color: var(--fg); }
.art-list { display: grid; gap: 12px; margin: 32px 0 0; padding: 0; list-style: none; }
.art-list a { display: block; text-decoration: none; padding: 20px 22px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); transition: border-color .15s; }
.art-list a:hover { border-color: var(--line-strong); }
.art-list b { display: block; font-size: 18px; font-weight: 600; color: var(--fg); }
.art-list span { display: block; margin-top: 6px; font-size: 14px; color: var(--fg3); }
.art-more { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); }
.art-more h2 { font-size: 16px; margin-bottom: 12px; }
@media (max-width: 720px) {
  html { scroll-padding-top: 78px; }
  .hd { padding: 10px 12px 0; }
  .hd-in { width: auto; height: 56px; padding: 0 9px; }
  .hd-logo { margin-right: 0; }
  .hd-logo img { width: 36px; height: 36px; border-radius: 9px; }
  .hd-nav { flex: 1; justify-content: space-between; overflow-x: auto; scrollbar-width: none; }
  .hd-nav::-webkit-scrollbar { display: none; }
  .hd-nav a { min-width: 0; padding: 6px 6px; }
  .hd-dc { width: 36px; height: 36px; margin-left: 0; }
  .hd-dc svg { width: 19px; height: 19px; }
  .sum-tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 370px) {
  .hd-nav a { padding: 6px 4px; font-size: 12px; }
}