:root{--bd-accent:#6d4aff;--bd-accent-deep:#4e35d8;--bd-ink:#1a1f33;--bd-muted:#4a5170;--bd-faint:#8089a6;--bd-line:#e7e8f2;--bd-soft:#f6f7fb;--bd-grad:linear-gradient(135deg,#6d4aff,#4e35d8)}
.bd-shell{max-width:1400px;margin-left:auto;margin-right:auto;padding:40px 40px 0;box-sizing:border-box;width:100%}
/* shared sidebar shell (category + single doc) */
.bd-has-side{display:grid;grid-template-columns:280px minmax(0,1fr) 240px;gap:56px;align-items:start;padding-bottom:96px}
.bd-has-side .bd-toc{display:block}
/* sidebar nav */
.bd-side{padding-top:36px;font-size:14px}
.bd-nav-cat{margin-bottom:2px}
.bd-nav-cat-link{display:block;padding:8px 12px;border-radius:8px;color:var(--bd-muted);text-decoration:none;font-weight:600;line-height:1.35}
.bd-nav-cat-link:hover{background:var(--bd-soft);color:var(--bd-accent)}
.bd-nav-cat.open>.bd-nav-cat-link,.bd-nav-cat-link.active{color:var(--bd-accent)}
.bd-nav-children{margin:2px 0 8px;padding-left:8px;border-left:1px solid var(--bd-line);margin-left:12px}
.bd-nav-child{display:block;padding:6px 12px;border-radius:8px;color:var(--bd-muted);text-decoration:none;line-height:1.4}
.bd-nav-child:hover{color:var(--bd-accent)}
.bd-nav-child.active{background:rgba(109,74,255,.1);color:var(--bd-accent);font-weight:600}
/* main column */
.bd-main{min-width:0;padding-top:24px}
.bd-main-wide{max-width:820px}
.bd-crumb{font-size:13px;color:var(--bd-faint);margin:0 0 18px}
.bd-crumb a{color:var(--bd-faint);text-decoration:none}
.bd-crumb a:hover{color:var(--bd-accent)}
.bd-crumb .sep{margin:0 8px;opacity:.6}
.bd-main h1{font-size:36px;line-height:1.15;margin:0 0 24px;color:var(--bd-ink);letter-spacing:-.02em;font-weight:800}
.bd-main h2{font-size:24px;margin:38px 0 14px;color:var(--bd-ink);font-weight:700;scroll-margin-top:90px}
.bd-main p,.bd-main li{font-size:16px;line-height:1.75;color:#2a2f45}
.bd-main ul{padding-left:22px}
.bd-main a{color:var(--bd-accent)}
.bd-main code{background:rgba(109,74,255,.1);color:var(--bd-accent-deep);padding:2px 7px;border-radius:6px;font-size:90%}
.bd-main blockquote{border-left:3px solid var(--bd-accent);background:rgba(109,74,255,.06);padding:14px 18px;border-radius:0 10px 10px 0;margin:22px 0;color:var(--bd-muted)}
.bd-main blockquote p{margin:0}
.bd-cat-desc{font-size:17px;color:var(--bd-muted);margin:0 0 24px}
/* on this page */
.bd-toc{position:sticky;top:90px;align-self:start;font-size:13px;padding-top:24px}
.bd-toc .bd-toc-h{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--bd-faint);font-weight:700;margin-bottom:12px}
.bd-toc a{display:block;color:var(--bd-muted);text-decoration:none;padding:5px 0 5px 12px;border-left:2px solid var(--bd-line);line-height:1.45}
.bd-toc a:hover{color:var(--bd-accent);border-left-color:var(--bd-accent)}
/* KB index (home) */
.bd-kb-head{padding:48px 0 6px}
.bd-kb-head h1{font-size:40px;margin:0 0 10px;color:var(--bd-ink);letter-spacing:-.02em;font-weight:800}
.bd-kb-head p{font-size:18px;color:var(--bd-muted);margin:0}
.bd-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding:34px 0 80px}
.bd-card{border-radius:18px;padding:28px;text-decoration:none;display:block;border:1px solid var(--bd-line);background:#fff;transition:transform .16s,box-shadow .16s}
.bd-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(78,53,216,.14)}
.bd-card h3{font-size:20px;margin:0 0 10px;color:var(--bd-ink);font-weight:700}
.bd-card p{font-size:15px;line-height:1.55;color:var(--bd-muted);margin:0 0 18px}
.bd-card .bd-count{font-size:14px;color:var(--bd-faint);font-weight:600}
.bd-card.feat{color:#fff;border:none;background:var(--bd-grad);box-shadow:0 12px 30px rgba(78,53,216,.28)}
.bd-card.feat:hover{box-shadow:0 20px 46px rgba(78,53,216,.4)}
.bd-card.feat h3,.bd-card.feat .bd-count{color:#fff}
.bd-card.feat p{color:#fff;opacity:.92}
/* category article rows */
.bd-artlist{padding-bottom:20px}
.bd-artrow{display:block;text-decoration:none;border:1px solid var(--bd-line);border-radius:14px;padding:20px 22px;margin-bottom:14px;transition:.16s}
.bd-artrow:hover{border-color:var(--bd-accent);box-shadow:0 8px 24px rgba(78,53,216,.1)}
.bd-artrow h3{margin:0 0 6px;font-size:18px;color:var(--bd-ink);font-weight:700}
.bd-artrow p{margin:0;color:var(--bd-muted);font-size:15px}
@media(max-width:1080px){.bd-has-side{grid-template-columns:1fr}.bd-side,.bd-toc{display:none}.bd-cards{grid-template-columns:1fr}}

.bd-langsw{display:inline-flex;gap:4px;margin-left:18px;vertical-align:middle}
.bd-langsw-item{font-size:13px;font-weight:600;padding:4px 9px;border-radius:7px;color:var(--bd-muted);text-decoration:none}
.bd-langsw-item.current{background:var(--bd-grad);color:#fff}
.bd-langsw-item:not(.current):hover{background:rgba(109,74,255,.1);color:var(--bd-accent)}

/* Language switcher dropdown spacing */
.pll-switcher-select{padding:6px 34px 6px 12px;border:1px solid var(--bd-line);border-radius:9px;background-color:#fff;color:var(--bd-muted);font-size:14px;line-height:1.4;cursor:pointer;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%2712%27%20height%3D%2712%27%20viewBox%3D%270%200%2012%2012%27%3E%3Cpath%20fill%3D%27none%27%20stroke%3D%27%236d4aff%27%20stroke-width%3D%271.6%27%20d%3D%27M2.5%204.5L6%208l3.5-3.5%27%2F%3E%3C%2Fsvg%3E");background-repeat:no-repeat;background-position:right 12px center}
.pll-switcher-select:hover{border-color:var(--bd-accent)}
.pll-switcher-select:focus{outline:none;border-color:var(--bd-accent);box-shadow:0 0 0 3px rgba(109,74,255,.12)}