:root{
--primary:#0891b2;
--accent:#f97316;
--bg:#ffffff;
--bg-soft:#f7fbf8;
--surface:#ffffff;
--control:#eef7f1;
--hover:#e6f7f3;
--text:#16302f;
--muted:#5d7170;
--border:#dbe7e3;
--shadow:rgba(17,38,38,.12);
color-scheme:light;
}

:root[data-theme="dark"]{
--primary:#22d3ee;
--accent:#fb923c;
--bg:#0b1f23;
--bg-soft:#102b2f;
--surface:#132f34;
--control:#1d3b40;
--hover:#174a52;
--text:#e8f6f4;
--muted:#a7c3c0;
--border:#285158;
--shadow:rgba(0,0,0,.42);
color-scheme:dark;
}

*{margin:0;padding:0;box-sizing:border-box}
body{font-family:Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--primary)}

.topbar{
position:sticky;top:0;z-index:1000;display:flex;justify-content:space-between;align-items:center;
padding:14px 24px;background:var(--surface);border-bottom:1px solid var(--border)
}
.topbar-brand,.topbar-actions{display:flex;align-items:center;gap:12px}
.logo a{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.logo img{display:block;width:38px;height:38px;object-fit:contain;border-radius:8px}
.brand-text{font-size:20px;font-weight:800;letter-spacing:0;color:var(--text)}
.logo-label{padding-left:12px;border-left:1px solid var(--border);font-size:14px;font-weight:600;color:var(--muted);white-space:nowrap}

.search-wrapper{position:relative}
#searchInput{width:280px;padding:10px 14px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text)}
#searchResults{display:none;position:absolute;top:48px;left:0;width:100%;background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden;box-shadow:0 10px 30px var(--shadow);z-index:10001}
#searchResults a{display:block;padding:12px 15px;text-decoration:none;color:var(--text)}
#searchResults a:hover{background:var(--hover)}
.language-switcher{padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text)}
#themeToggle,.menu-toggle{width:42px;height:42px;border:none;border-radius:8px;cursor:pointer;background:var(--control);color:var(--text);font-size:20px}
.menu-toggle{display:none;font-size:22px}

.layout{display:flex;min-height:calc(100vh - 70px)}
.sidebar{width:280px;flex-shrink:0;padding:24px;background:var(--bg-soft);border-right:1px solid var(--border);position:sticky;top:67px;height:calc(100vh - 67px);overflow-y:auto}
.close-sidebar{display:none}
.sidebar h3{margin:18px 0 8px;font-size:14px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.sidebar h3:first-of-type{margin-top:0}
.sidebar ul{list-style:none;margin-bottom:12px}
.sidebar a{display:block;padding:8px 10px;border-radius:8px;text-decoration:none;color:var(--text);font-size:15px}
.sidebar a:hover,.sidebar a.active{background:var(--hover);color:var(--primary)}
.sidebar-overlay{display:none}

.content{width:100%;max-width:980px;padding:34px 40px;margin:0 auto}
.hero{padding:44px 0 34px;border-bottom:1px solid var(--border);margin-bottom:28px}
.hero h1{font-size:48px;line-height:1;margin-bottom:10px;color:var(--primary)}
.hero p:first-of-type{font-size:20px;color:var(--accent);font-weight:700;margin-bottom:10px}
.hero p{max-width:700px;color:var(--muted)}
.quick-links{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:28px}
.card{display:flex;align-items:center;min-height:88px;padding:18px;border:1px solid var(--border);border-radius:8px;background:var(--surface);box-shadow:0 8px 24px var(--shadow);text-decoration:none;color:var(--text);font-weight:700}
.card:hover{border-color:var(--primary);background:var(--hover)}
.popular-articles{margin:14px 0 0 20px}
.popular-articles li{margin:8px 0}

.article-header{margin-bottom:18px}
.breadcrumb{display:flex;gap:8px;align-items:center;margin-bottom:12px;color:var(--muted);font-size:14px}
.breadcrumb a{text-decoration:none}
h1{font-size:34px;line-height:1.2;margin-bottom:16px}
h2{font-size:24px;margin:30px 0 12px}
h3{font-size:18px;margin:22px 0 8px}
p{margin:0 0 14px}
ul,ol{margin:0 0 16px 24px}
li{margin:6px 0}
.article-content code{display:block;margin:12px 0;padding:14px;overflow-wrap:anywhere;border:1px solid var(--border);border-radius:8px;background:var(--bg-soft);color:var(--text);font-family:Consolas,monospace}
.article-content img{max-width:100%;height:auto}
.article-toc{padding:16px 18px;margin:20px 0;border:1px solid var(--border);border-radius:8px;background:var(--bg-soft)}
.article-toc ol{margin:8px 0 0 20px}
.article-toc a{text-decoration:none}
.article-navigation{display:flex;justify-content:space-between;gap:18px;margin-top:36px;padding-top:20px;border-top:1px solid var(--border)}
.article-navigation a{padding:12px 14px;border:1px solid var(--border);border-radius:8px;text-decoration:none;background:var(--surface)}
.nav-next{margin-left:auto;text-align:right}
.legal-content{max-width:820px}

.footer{border-top:1px solid var(--border);background:var(--bg-soft);padding:22px 28px}
.footer-content{display:flex;align-items:center;justify-content:space-between;gap:18px;max-width:1180px;margin:0 auto;color:var(--muted)}
.footer-brand{display:flex;align-items:center;gap:12px;margin:0}
.kolibri-link img{display:block;width:120px;max-height:42px;object-fit:contain}
.footer-links{display:flex;justify-content:center;gap:18px;padding:14px 24px;background:var(--surface);border-top:1px solid var(--border);font-size:14px}
.footer-links a{text-decoration:none;color:var(--muted)}
.error-page{text-align:center;padding-top:80px}
.error-code{font-size:72px;line-height:1;color:var(--accent);font-weight:800}
.error-home{display:inline-block;margin-top:14px;padding:12px 16px;border-radius:8px;background:var(--primary);color:#fff;text-decoration:none}

@media (max-width:900px){
.topbar{padding:12px 14px;gap:12px}
.menu-toggle{display:block}
.topbar-actions{gap:8px}
#searchInput{width:190px}
.layout{display:block}
.sidebar{position:fixed;top:0;left:-290px;height:100vh;z-index:10002;transition:left .2s ease;box-shadow:0 18px 40px var(--shadow)}
.sidebar.active{left:0}
.close-sidebar{display:block;float:right;width:36px;height:36px;border:none;border-radius:8px;background:var(--control);color:var(--text);font-size:24px}
.sidebar-overlay.active{display:block;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:10001}
.content{padding:26px 18px}
.quick-links{grid-template-columns:repeat(2,1fr)}
.hero h1{font-size:38px}
.logo-label{display:none}
}

@media (max-width:560px){
.topbar{align-items:flex-start;flex-wrap:wrap}
.topbar-actions{width:100%;display:grid;grid-template-columns:1fr auto auto}
.search-wrapper{min-width:0}
#searchInput{width:100%}
.quick-links{grid-template-columns:1fr}
.article-navigation{display:block}
.article-navigation a{display:block;margin:0 0 10px}
.footer-content{display:block;text-align:center}
.footer-brand{justify-content:center;margin-top:10px}
.footer-links{flex-wrap:wrap}
h1{font-size:29px}
}