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.topbar{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--rule)}.topbar__inner{max-width:1520px;margin:auto;padding:16px 28px;min-height:var(--header-height);display:flex;align-items:center;gap:24px}.brand{color:var(--ink);font-size:22px;font-weight:700;white-space:nowrap}.brand span{font-size:14px;font-weight:400;margin-left:12px;color:var(--muted)}.brand:hover{text-decoration:none}.header-search{display:flex;max-width:560px;width:100%;margin-left:auto;gap:0}.header-search input{min-width:0;flex:1;border:1px solid #a8b3bf;border-right:0;padding:8px 12px;border-radius:4px 0 0 4px;background:#fff}.header-search button{padding:8px 16px;color:#fff;background:var(--accent);border:1px solid var(--accent);border-radius:0 4px 4px 0}.nav-toggle{display:none;border:1px solid var(--rule);background:#fff;padding:8px 12px;border-radius:4px}
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@media(max-width:1100px){.layout{grid-template-columns:250px minmax(0,1fr);gap:28px}.brand span{display:none}.topbar__inner{gap:20px}}
@media(max-width:760px){:root{--header-height:126px}.topbar__inner{padding:12px 16px;display:grid;grid-template-columns:1fr auto;gap:10px}.brand{font-size:21px}.nav-toggle{display:block;grid-column:2;grid-row:1}.header-search{grid-column:1/-1;grid-row:2;max-width:none}.header-search input{font-size:14px}.header-search button{font-size:14px;padding:8px 12px}.layout{display:block;padding:24px 18px}.sidebar{display:none;position:fixed;inset:var(--header-height) 0 0;z-index:20;background:#fff;padding:16px 20px}.sidebar__inner{position:static;max-height:100%;height:100%;border:0}.nav-open .sidebar{display:block}.content h1{font-size:30px}.lead{font-size:17px}.chapter-list>li{grid-template-columns:34px 1fr}.pager{flex-direction:column;gap:14px}.pager__link{max-width:100%}pre{padding:14px;font-size:13px}.breadcrumbs{line-height:1.7}}
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