:root{--ds-bg:#f6f8fb;--ds-surface:#fff;--ds-ink:#172433;--ds-muted:#5b6b7a;--ds-line:#dde5ee;--ds-accent:#5b3df5;--ds-accent2:#0ea5e9;--ds-accent-soft:#eef0ff;--ds-sidebar:290px;--ds-radius:14px;--ds-shadow:0 8px 28px rgba(23,36,51,.07);--ds-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;--ds-font:"Vazirmatn","VazirLocal",Tahoma,"Segoe UI",sans-serif}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--ds-bg:#0e1420;--ds-surface:#161e2d;--ds-ink:#e8eef8;--ds-muted:#9caec4;--ds-line:#273449;--ds-accent:#8b78ff;--ds-accent2:#38bdf8;--ds-accent-soft:#24214a;--ds-shadow:0 8px 28px rgba(0,0,0,.22)}}
:root[data-theme=dark]{--ds-bg:#0e1420;--ds-surface:#161e2d;--ds-ink:#e8eef8;--ds-muted:#9caec4;--ds-line:#273449;--ds-accent:#8b78ff;--ds-accent2:#38bdf8;--ds-accent-soft:#24214a;--ds-shadow:0 8px 28px rgba(0,0,0,.22)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body.ds-body{margin:0;background:var(--ds-bg);color:var(--ds-ink);font:400 16px/1.95 var(--ds-font);-webkit-font-smoothing:antialiased}
a{color:var(--ds-accent2)}
.ds-topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 18px;background:color-mix(in srgb,var(--ds-surface) 88%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--ds-line)}
.ds-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ds-ink);font-weight:800}
.ds-logo{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--ds-accent),var(--ds-accent2));color:#fff;font:800 18px/1 var(--ds-mono)}
.ds-brand small{display:block;font-weight:500;color:var(--ds-muted);font-size:12px}
.ds-actions{display:flex;gap:8px;align-items:center}
.ds-btn{border:1px solid var(--ds-line);background:var(--ds-surface);color:var(--ds-ink);border-radius:10px;padding:6px 12px;font:500 13px var(--ds-font);cursor:pointer}
.ds-btn:hover{border-color:color-mix(in srgb,var(--ds-accent) 35%,var(--ds-line))}
.ds-layout{display:grid;grid-template-columns:var(--ds-sidebar) minmax(0,1fr);max-width:1480px;margin:0 auto;gap:22px;padding:0 18px 48px}
.ds-sidebar{position:sticky;top:58px;align-self:start;max-height:calc(100vh - 70px);overflow:auto;padding:18px 0}
.ds-nav{background:var(--ds-surface);border:1px solid var(--ds-line);border-radius:var(--ds-radius);box-shadow:var(--ds-shadow);padding:12px}
.ds-nav a{display:block;padding:7px 10px;margin:2px 0;border-radius:9px;color:var(--ds-muted);text-decoration:none;font-size:14px;line-height:1.7;border-right:3px solid transparent}
.ds-nav a:hover{background:var(--ds-accent-soft);color:var(--ds-accent)}
.ds-nav a.active{background:var(--ds-accent-soft);color:var(--ds-accent);font-weight:700;border-right-color:var(--ds-accent)}
.ds-nav .nav-group{margin-top:10px}
.ds-nav .nav-group:first-child{margin-top:0}
.ds-nav .nav-group-title{padding:6px 10px 2px;font-size:12px;font-weight:700;color:var(--ds-muted)}
.ds-main{min-width:0;padding-top:18px}
.ds-breadcrumb{font-size:13px;color:var(--ds-muted);margin:0 0 10px}
.ds-breadcrumb a{color:var(--ds-muted);text-decoration:none}
.ds-breadcrumb a:hover{color:var(--ds-accent)}
.ds-page-head{background:linear-gradient(135deg,color-mix(in srgb,var(--ds-accent) 92%,#182038),color-mix(in srgb,var(--ds-accent2) 88%,#123));color:#fff;border-radius:18px;padding:26px 28px;margin:0 0 18px;box-shadow:var(--ds-shadow)}
.ds-page-head .kicker{display:inline-block;font-size:12px;background:rgba(255,255,255,.16);padding:3px 10px;border-radius:999px;margin-bottom:8px}
.ds-page-head h1{margin:0 0 6px;font-size:clamp(24px,3.2vw,34px);line-height:1.45}
.ds-page-head p{margin:0;opacity:.92;max-width:78ch}
.ds-article{background:var(--ds-surface);border:1px solid var(--ds-line);border-radius:18px;box-shadow:var(--ds-shadow);padding:8px 0}
.ds-content{padding:8px 26px 24px}
/* keep embedded page content readable; page-specific styles still apply */
.ds-content img,.ds-content svg,.ds-content video{max-width:100%;height:auto}
.ds-content table{max-width:100%}
.ds-footer{margin-top:18px;padding:14px 4px;color:var(--ds-muted);font-size:13px}
.ds-menu-btn{display:none}
@media (max-width:980px){
 .ds-layout{grid-template-columns:1fr;gap:0}
 .ds-sidebar{position:fixed;top:58px;right:0;bottom:0;width:min(320px,86vw);background:transparent;padding:10px;transform:translateX(105%);transition:transform .18s ease;z-index:25}
 .ds-sidebar.open{transform:none}
 .ds-nav{max-height:100%;overflow:auto}
 .ds-menu-btn{display:inline-flex}
 .ds-page-head{padding:20px}
 .ds-content{padding:8px 16px 18px}
}
@media print{.ds-topbar,.ds-sidebar,.ds-actions{display:none!important}.ds-layout{display:block}.ds-article,.ds-page-head{box-shadow:none}}
/* Adaptation for pages that shipped their own full layout */
.ds-content .layout{grid-template-columns:220px minmax(0,1fr);max-width:none;gap:18px;padding:0}
.ds-content aside:not(.ds-sidebar){position:sticky;top:76px;max-height:calc(100vh - 90px);overflow:auto}
.ds-content main{padding:0;min-width:0}
.ds-content .hero{display:none} /* we render our own page head */
.ds-content .top{display:none}
.ds-content .side{position:sticky;top:76px}
@media (max-width:980px){
 .ds-content .layout{grid-template-columns:1fr}
 .ds-content aside:not(.ds-sidebar),.ds-content .side{position:static;max-height:none}
}