:root{
  --black:#090909;
  --black2:#181818;
  --red:#d40000;
  --red2:#a90000;
  --blue:#07588a;
  --blue2:#05436a;
  --page:#d7d9db;
  --panel:#ffffff;
  --panel2:#f2f4f6;
  --panel3:#e8ecef;
  --text:#16232d;
  --muted:#687681;
  --border:#c7cdd2;
  --success:#18763a;
  --warning:#a96400;
  --danger:#a91414;
  --code:#eef1f3;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--page);color:var(--text);line-height:1.62}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
.layout{display:grid;grid-template-columns:285px minmax(0,1fr);min-height:100vh}
.main-sidebar{position:sticky;top:0;height:100vh;overflow-y:auto;padding:20px 16px;background:var(--black);border-right:6px solid var(--red);color:#fff}
.brand{display:flex;align-items:center;gap:11px;padding:4px 6px 18px;border-bottom:1px solid #2d2d2d;margin-bottom:14px}
.brand-mark{width:8px;height:38px;background:var(--red)}
.brand h1{margin:0;font-size:19px;line-height:1.2;text-transform:uppercase}.brand span{color:#aeb6bc;font-size:12px}
.site-links{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:0 0 14px}.site-links a{padding:8px 9px;background:#202020;color:#fff;font-size:10px;font-weight:900;text-transform:uppercase;text-align:center;border-bottom:2px solid var(--blue)}
nav a{display:block;padding:8px 10px;margin:2px 0;color:#d6dadd;font-size:12px;border-left:3px solid transparent}nav a:hover{background:#181818;color:#fff;border-left-color:var(--blue);text-decoration:none}
.nav-title{margin:15px 0 5px;padding:7px 10px;background:var(--red);color:#fff;font-size:10px;font-weight:900;letter-spacing:.06em;text-transform:uppercase}
main{padding:30px clamp(18px,4vw,55px);max-width:1320px;width:100%}
.hero{padding:30px 32px;border:1px solid var(--border);border-left:8px solid var(--red);background:#fff;box-shadow:0 10px 26px rgba(0,0,0,.09);margin:0 0 18px}
.hero-topline{display:flex;gap:24px;justify-content:space-between;align-items:flex-start}.hero h2{margin:0 0 10px;font-size:clamp(30px,4vw,50px);line-height:1;text-transform:uppercase;color:#0a0a0a}.hero p{max-width:850px;color:var(--muted);font-size:16px;margin-bottom:0}
.language-switcher{min-width:220px;padding:12px;background:var(--panel2);border:1px solid var(--border)}.language-switcher label{display:block;margin-bottom:7px;color:#111;font-weight:900;font-size:11px;text-transform:uppercase}.language-switcher select{width:100%;padding:10px 11px;border:1px solid #aeb7be;background:#fff;color:var(--text);font-weight:700;outline:none}
.badge-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px}.badge{display:inline-flex;align-items:center;padding:6px 9px;background:#e7eef3;border-left:3px solid var(--blue);color:#1e4056;font-size:11px;font-weight:800}
.tutorial-search-bar{display:flex;gap:9px;align-items:center;margin:0 0 18px;padding:12px;background:#fff;border:1px solid var(--border)}.tutorial-search-bar input{flex:1;min-width:0;padding:11px 12px;border:1px solid #aeb8c0;background:#fff;color:var(--text);font-size:14px;outline:none}.tutorial-search-bar input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(7,88,138,.12)}.tutorial-search-bar button{padding:11px 15px;border:0;background:var(--blue);color:#fff;font-weight:900;cursor:pointer;text-transform:uppercase}
section{margin:18px 0;padding:24px;border:1px solid var(--border);background:#fff;box-shadow:0 4px 12px rgba(0,0,0,.045)}
section>h2{margin:-24px -24px 20px;padding:14px 18px;background:var(--panel2);border-bottom:1px solid var(--border);border-left:6px solid var(--red);font-size:21px;line-height:1.2;text-transform:uppercase;color:#111}
h3{margin-top:22px;font-size:18px;color:#111}h4{margin:17px 0 7px;font-size:15px;color:#111}p,li{color:var(--muted)}strong{color:var(--text)}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:16px}.card{padding:16px;border:1px solid var(--border);border-left:4px solid var(--blue);background:#fff}.card h3{margin:0 0 6px;font-size:15px;text-transform:uppercase}.card p{margin:0;font-size:13px}
ul{padding-left:21px}li{margin:6px 0}
.steps{counter-reset:step;padding-left:0;list-style:none}.steps li{position:relative;padding:14px 14px 14px 52px;margin-bottom:9px;background:var(--panel2);border:1px solid var(--border)}.steps li::before{counter-increment:step;content:counter(step);position:absolute;left:13px;top:13px;width:27px;height:27px;display:grid;place-items:center;background:var(--red);color:#fff;font-weight:900}
.notice{padding:13px 14px;margin:15px 0;border-left:5px solid var(--blue);background:#eaf1f5;color:var(--muted)}.notice.warning{border-left-color:var(--warning);background:#fff3e1}.notice.danger{border-left-color:var(--danger);background:#fde7e7}.notice.success{border-left-color:var(--success);background:#e7f5eb}
code{background:var(--code);border:1px solid #d2d8dc;color:#1a3546;padding:2px 6px;font-size:.94em}
table{width:100%;border-collapse:collapse;margin-top:14px}th,td{padding:11px 12px;border-bottom:1px solid #e1e5e8;text-align:left;vertical-align:top}th{background:#e9edf0;color:#111;font-size:11px;text-transform:uppercase}td{color:var(--muted);background:#fff}
.sidebar-tabs-layout{display:grid;grid-template-columns:245px minmax(0,1fr);gap:15px;margin-top:15px}.sidebar-tabs-nav{padding:12px;background:var(--black);border-top:4px solid var(--red);align-self:start;position:sticky;top:15px}.sidebar-tabs-nav h3{margin:0 0 10px;color:#fff;font-size:15px;text-transform:uppercase}.sidebar-tabs-search{width:100%;margin-bottom:10px;padding:10px;border:1px solid #484848;background:#111;color:#fff;outline:none}.sidebar-tab-button{width:100%;text-align:left;padding:10px 11px;margin:0 0 6px;border:0;border-left:3px solid transparent;background:#202020;color:#cbd1d5;font-weight:800;cursor:pointer}.sidebar-tab-button:hover,.sidebar-tab-button.active{color:#fff;background:var(--blue);border-left-color:#fff}.sidebar-tabs-content{min-width:0}.sidebar-tab-panel{display:none;padding:18px;border:1px solid var(--border);background:#fff}.sidebar-tab-panel.active{display:block}.sidebar-tab-panel.hidden-by-search,.sidebar-tab-button.hidden-by-search{display:none!important}.mini-label{display:inline-block;margin:0 5px 7px 0;padding:4px 7px;background:#e7eef3;border-left:3px solid var(--blue);color:var(--blue2);font-size:10px;font-weight:900;text-transform:uppercase}
.search-highlight{background:#ffe28a;color:#111;padding:0 2px}.search-empty{padding:18px;border:1px dashed #aab4bb;color:var(--muted);background:#f6f7f8}.footer{color:#5f6b73;font-size:12px;padding:18px 0 5px}.footer a{font-weight:800}
@media(max-width:1000px){.sidebar-tabs-layout{grid-template-columns:215px minmax(0,1fr)}}
@media(max-width:900px){.layout{grid-template-columns:1fr}.main-sidebar{position:relative;height:auto;border-right:0;border-bottom:5px solid var(--red)}main{padding:18px 12px}.grid{grid-template-columns:1fr}.hero{padding:22px}.hero-topline{flex-direction:column}.language-switcher{width:100%;min-width:0}.sidebar-tabs-layout{grid-template-columns:1fr}.sidebar-tabs-nav{position:relative;top:0}.tutorial-search-bar{flex-direction:column;align-items:stretch}}