:root{
  --bg:#f6f8f7;--surface:#fff;--surface-2:#eef3f1;--text:#17201d;--muted:#64706b;
  --line:#dfe7e3;--brand:#1f6f56;--brand-dark:#155340;--accent:#78c4a4;--dark:#101815;
  --radius:18px;--shadow:0 20px 55px rgba(23,32,29,.09);--sidebar:278px;--max:1440px
}
:root[data-theme="dark"]{
  --bg:#111714;--surface:#171f1b;--surface-2:#202b26;--text:#edf4f1;--muted:#a2afa9;
  --line:#2b3732;--brand:#78c4a4;--brand-dark:#8dd2b5;--accent:#78c4a4;--dark:#0a0f0d;
  --shadow:0 20px 55px rgba(0,0,0,.25)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);line-height:1.65}
button,input{font:inherit}
a{color:inherit}
.site-header{height:72px;position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%, transparent);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.header-inner{height:100%;max-width:var(--max);margin:auto;padding:0 28px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:750;letter-spacing:-.025em;white-space:nowrap}
.brand-logo{width:38px;height:38px;display:block;flex:0 0 auto}
.brand small{font-size:12px;font-weight:650;color:var(--muted);letter-spacing:0;margin-left:2px}
.header-search{width:min(560px,42vw);margin-left:24px;position:relative}
.header-search input,.hero-search input{width:100%;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:12px;outline:none;transition:.15s}
.header-search input{height:42px;padding:0 42px 0 40px}
.search-icon{position:absolute;left:14px;top:50%;translate:0 -50%;color:var(--muted);pointer-events:none}
.search-kbd{position:absolute;right:10px;top:50%;translate:0 -50%;font-size:11px;border:1px solid var(--line);border-radius:6px;padding:1px 6px;color:var(--muted);background:var(--bg)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.icon-btn,.mobile-menu{width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--text);cursor:pointer;display:inline-grid;place-items:center;padding:0}
.app-link{display:inline-flex;align-items:center;height:40px;padding:0 15px;border-radius:10px;border:1px solid var(--line);text-decoration:none;font-size:13px;font-weight:650;background:var(--surface)}
.mobile-menu{display:none}
.layout{max-width:var(--max);margin:auto;display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr)}
.sidebar{position:sticky;top:72px;height:calc(100vh - 72px);overflow:auto;border-right:1px solid var(--line);padding:28px 22px 40px}
.sidebar-title{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);padding:0 10px 10px}
.nav-section{margin:0 0 22px}
.nav-section-title{font-size:12px;font-weight:750;color:var(--text);padding:0 10px 7px}
.nav-link{display:flex;align-items:center;gap:8px;text-decoration:none;padding:7px 10px;border-radius:9px;color:var(--muted);font-size:13px;line-height:1.35}
.nav-link:hover{background:var(--surface-2);color:var(--text)}
.nav-link.active{background:var(--surface-2);color:var(--brand);font-weight:700}
.badge{display:inline-flex;align-items:center;justify-content:center;padding:3px 7px;border-radius:999px;font-size:10px;font-weight:800;letter-spacing:.05em;line-height:1.2;text-transform:uppercase;background:rgba(120,196,164,.16);color:var(--brand)}
.nav-link .badge{margin-left:auto;font-size:8px;padding:2px 5px}
.main{min-width:0;padding:52px 56px 88px}
.content-wrap{max-width:900px;margin:0 auto}
.breadcrumbs{font-size:12px;color:var(--muted);margin-bottom:24px}
.breadcrumbs a{text-decoration:none}
.article-head{padding-bottom:30px;border-bottom:1px solid var(--line);margin-bottom:36px}
.article-kicker{display:flex;gap:10px;align-items:center;margin-bottom:13px;font-size:12px;font-weight:750;text-transform:uppercase;letter-spacing:.1em;color:var(--brand)}
h1,h2,h3{line-height:1.13;letter-spacing:-.035em}
h1{font-size:clamp(38px,5vw,58px);margin:0 0 18px}
h2{font-size:27px;margin:46px 0 14px}
h3{font-size:19px;margin:32px 0 10px}
.article-summary{font-size:18px;line-height:1.65;color:var(--muted);max-width:760px;margin:0}
.article-body{font-size:16px}
.article-body p{margin:0 0 18px;color:var(--text)}
.article-body ul,.article-body ol{padding-left:23px;margin:0 0 22px}
.article-body li{margin:6px 0}
.article-body code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em;background:var(--surface-2);padding:2px 6px;border-radius:6px}
.article-body blockquote{margin:28px 0;padding:17px 20px;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:0 12px 12px 0;background:var(--surface);color:var(--text)}
.article-body blockquote p{margin:0}
.article-footer{border-top:1px solid var(--line);margin-top:54px;padding-top:26px;display:flex;justify-content:space-between;gap:18px;align-items:center;color:var(--muted);font-size:13px}
.article-footer a{color:var(--brand);font-weight:650;text-decoration:none}
.home-main{padding:0}
.help-hero{padding:78px 56px 58px;border-bottom:1px solid var(--line)}
.help-hero-inner{max-width:980px;margin:auto}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:14px}
.help-hero h1{max-width:800px}
.help-hero p{max-width:760px;color:var(--muted);font-size:18px}
.hero-search{max-width:720px;margin-top:30px;position:relative}
.hero-search input{height:58px;padding:0 50px 0 48px;font-size:16px;box-shadow:var(--shadow)}
.hero-search .search-icon{left:18px}
.home-content{max-width:1080px;margin:auto;padding:54px 56px 90px}
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.card{display:block;padding:25px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);text-decoration:none;transition:.18s}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--brand) 35%,var(--line))}
.card-icon{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:var(--dark);color:var(--accent);font-size:13px;font-weight:800;margin-bottom:28px}
.card h2{font-size:20px;margin:0 0 8px}
.card p{font-size:14px;color:var(--muted);margin:0}
.home-section-title{font-size:13px;text-transform:uppercase;letter-spacing:.11em;color:var(--muted);margin:0 0 18px}
.quick-links{margin-top:52px;display:grid;grid-template-columns:1fr 1fr;gap:24px}
.quick-box{padding:26px;border-radius:var(--radius);background:var(--surface-2)}
.quick-box h3{margin:0 0 12px;font-size:18px}
.quick-box a{display:block;text-decoration:none;color:var(--muted);font-size:14px;padding:5px 0}
.quick-box a:hover{color:var(--brand)}
.search-panel{position:fixed;inset:72px 0 0;z-index:60;background:rgba(10,15,13,.45);backdrop-filter:blur(4px);display:none;padding:42px 18px}
.search-panel.open{display:block}
.search-dialog{max-width:720px;margin:0 auto;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:0 30px 90px rgba(0,0,0,.25);overflow:hidden}
.search-dialog-input{padding:16px;border-bottom:1px solid var(--line);position:relative}
.search-dialog input{width:100%;height:48px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--text);padding:0 16px;outline:none}
.search-results{max-height:60vh;overflow:auto;padding:8px}
.search-result{display:block;text-decoration:none;padding:13px 14px;border-radius:10px}
.search-result:hover{background:var(--surface-2)}
.search-result-title{font-weight:700;font-size:14px;display:flex;align-items:center;gap:8px}
.search-result p{font-size:12px;color:var(--muted);margin:4px 0 0}
.search-empty{padding:28px;color:var(--muted);font-size:14px;text-align:center}
.site-footer{border-top:1px solid var(--line);padding:32px 56px;color:var(--muted);font-size:12px}
.footer-inner{max-width:1080px;margin:auto;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer-links{display:flex;gap:18px}
.footer-links a{text-decoration:none}
@media(max-width:980px){
  .header-search{display:none}.mobile-menu{display:inline-grid;place-items:center}.layout{grid-template-columns:1fr}
  .sidebar{position:fixed;top:72px;left:0;bottom:0;width:min(330px,88vw);height:auto;background:var(--bg);z-index:55;transform:translateX(-102%);transition:.2s;box-shadow:var(--shadow)}
  .sidebar.open{transform:translateX(0)}.main{padding:42px 28px 70px}.help-hero{padding:62px 28px 48px}.home-content{padding:42px 28px 72px}
}
@media(max-width:680px){
  .header-inner{padding:0 14px}.brand small,.app-link{display:none}.main{padding:34px 18px 58px}
  .help-hero{padding:44px 18px 38px}.home-content{padding:34px 18px 60px}
  .cards,.quick-links{grid-template-columns:1fr}.article-footer{align-items:flex-start;flex-direction:column}
  h1{font-size:38px}.site-footer{padding:28px 18px}.search-kbd{display:none}
}
.theme-toggle{position:relative}
.theme-icon{width:22px;height:22px;display:block}
.theme-icon.sun{display:none}
:root[data-theme="dark"] .theme-icon.sun{display:block}
:root[data-theme="dark"] .theme-icon.moon{display:none}

.card-icon img{width:24px;height:24px;display:block}


.lang-switch{display:inline-flex;align-items:center;height:40px;padding:3px;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-size:11px;font-weight:800;letter-spacing:.04em}
.lang-switch a{display:grid;place-items:center;min-width:30px;height:32px;padding:0 7px;border-radius:7px;text-decoration:none;color:var(--muted)}
.lang-switch a.active{background:var(--surface-2);color:var(--brand)}
.lang-switch a:hover{color:var(--text)}
@media(max-width:680px){.lang-switch{height:38px}.lang-switch a{min-width:28px;height:30px;padding:0 5px}}