/* ============================================================
   Ovium Knowledge Base — light + dark, no framework.
   ============================================================ */
:root{
  --bg:#ffffff; --bg-2:#f7f8fa; --card:#ffffff; --card-2:#f4f6f9;
  --line:#e6e8ee; --line-soft:#eef0f4;
  --text:#1a2233; --text-soft:#4a556b; --muted:#8a93a6;
  --accent:#2563eb; --accent-2:#1d4ed8;
  --amber:#e39a12; --amber-wash:rgba(227,154,18,.12);
  --sky:#0c86c4; --green:#0fa678; --violet:#6d5ce0;
  --shadow:0 1px 2px rgba(16,24,40,.04), 0 8px 24px rgba(16,24,40,.05);
  --radius:14px; --maxw:1180px;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}
html[data-theme="dark"]{
  --bg:#0b1120; --bg-2:#0e1526; --card:#111a2e; --card-2:#0e1526;
  --line:#23304a; --line-soft:#1a2438;
  --text:#e8edf6; --text-soft:#aab6cc; --muted:#7d8aa3;
  --accent:#7aa2ff; --accent-2:#5b8cff;
  --amber:#f7b733; --amber-wash:rgba(247,183,51,.14);
  --sky:#5cc1f0; --green:#37d3a0; --violet:#9d8cf0;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 12px 34px rgba(0,0,0,.4);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--sans);background:var(--bg);color:var(--text);font-size:15px;line-height:1.62;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
kbd{font-family:var(--sans);font-size:11px;border:1px solid var(--line);border-radius:5px;padding:1px 6px;
  color:var(--muted);background:var(--bg-2)}
.kb-ic{flex:none;vertical-align:middle}

/* ---------- Header ---------- */
.kb-header{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:18px;
  padding:0 22px;height:60px;background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.kb-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.kb-brand:hover{text-decoration:none}
.kb-brand-text{display:flex;flex-direction:column;line-height:1.05}
.kb-brand-name{font-weight:800;font-size:16px}
.kb-brand-sub{font-size:11px;color:var(--muted)}
.kb-search-btn{display:flex;align-items:center;gap:8px;height:38px;padding:0 12px;min-width:210px;
  border:1px solid var(--line);border-radius:10px;background:var(--bg-2);color:var(--muted);
  cursor:pointer;font-size:13px}
.kb-search-btn:hover{border-color:var(--accent)}
.kb-search-btn kbd{margin-left:auto}
.kb-topnav{display:flex;gap:4px;margin-left:auto}
.kb-topnav a{color:var(--text-soft);font-size:14px;font-weight:500;padding:7px 11px;border-radius:8px}
.kb-topnav a:hover{color:var(--text);background:var(--bg-2);text-decoration:none}
.kb-topnav a.is-active{color:var(--accent)}
.kb-header-right{display:flex;align-items:center;gap:8px}
.kb-applink{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-soft);
  padding:7px 10px;border-radius:8px}
.kb-applink:hover{color:var(--text);background:var(--bg-2);text-decoration:none}
.kb-theme{width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;background:var(--bg-2);color:var(--text-soft);cursor:pointer}
.kb-theme:hover{color:var(--text);border-color:var(--accent)}
.kb-theme-moon{display:none}
html[data-theme="dark"] .kb-theme-sun{display:none}
html[data-theme="dark"] .kb-theme-moon{display:inline-flex}
.kb-burger{display:none;width:38px;height:38px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;background:var(--bg-2);color:var(--text);cursor:pointer}

/* ---------- Shell ---------- */
.kb-shell{max-width:var(--maxw);margin:0 auto;display:flex;gap:0;align-items:flex-start}
.kb-main{flex:1;min-width:0;padding:28px 30px 60px}
.kb-main-home{padding-top:8px}

/* ---------- Landing ---------- */
.kb-hero{text-align:center;padding:46px 16px 30px}
.kb-hero h1{font-size:34px;font-weight:800;letter-spacing:-.02em}
.kb-hero p{max-width:640px;margin:12px auto 0;color:var(--text-soft);font-size:16px}
.kb-hero strong{color:var(--text)}
.kb-hero-search{margin:22px auto 0;display:flex;align-items:center;gap:10px;height:46px;padding:0 16px;
  border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--muted);
  cursor:pointer;font-size:14px;box-shadow:var(--shadow)}
.kb-hero-search kbd{margin-left:8px}
.kb-hero-search:hover{border-color:var(--accent)}

.kb-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:14px}
.kb-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;
  box-shadow:var(--shadow);transition:transform .15s ease, box-shadow .15s ease, border-color .15s}
.kb-card:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--card-accent,var(--accent)) 50%,var(--line))}
.kb-card-icon{width:44px;height:44px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:var(--accent-wash,var(--bg-2));color:var(--card-accent,var(--accent));margin-bottom:12px}
.kb-card h3{font-size:18px;font-weight:700}
.kb-card h3 a{color:var(--text)}
.kb-card h3 a:hover{color:var(--card-accent,var(--accent));text-decoration:none}
.kb-card>p{color:var(--text-soft);font-size:14px;margin-top:6px}
.kb-card-links{list-style:none;margin:14px 0 4px}
.kb-card-links li{margin:2px 0}
.kb-card-links a{display:flex;align-items:center;gap:6px;color:var(--text-soft);font-size:13.5px;padding:3px 0}
.kb-card-links a:hover{color:var(--card-accent,var(--accent));text-decoration:none}
.kb-card-links .kb-ic{color:var(--muted)}
.kb-card-cta{display:inline-flex;align-items:center;gap:6px;margin-top:10px;font-weight:600;font-size:14px;
  color:var(--card-accent,var(--accent))}

.kb-accent-amber{--card-accent:var(--amber);--accent-wash:var(--amber-wash)}
.kb-accent-sky{--card-accent:var(--sky);--accent-wash:color-mix(in srgb,var(--sky) 14%,transparent)}
.kb-accent-green{--card-accent:var(--green);--accent-wash:color-mix(in srgb,var(--green) 14%,transparent)}
.kb-accent-violet{--card-accent:var(--violet);--accent-wash:color-mix(in srgb,var(--violet) 16%,transparent)}

.kb-home-note{display:flex;gap:12px;align-items:flex-start;margin-top:26px;padding:16px 18px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:12px;color:var(--text-soft);font-size:14px}
.kb-home-note .kb-ic{color:var(--accent);margin-top:1px}

/* ---------- Sidebar ---------- */
.kb-sidebar{width:262px;flex:none;align-self:stretch;border-right:1px solid var(--line);
  position:sticky;top:60px;height:calc(100vh - 60px);overflow-y:auto}
.kb-sidebar-inner{padding:22px 16px 40px}
.kb-side-home{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--muted);
  padding:6px 10px;border-radius:8px;margin-bottom:8px}
.kb-side-home:hover{color:var(--text);background:var(--bg-2);text-decoration:none}
.kb-side-group{margin-bottom:18px}
.kb-side-head{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  color:var(--muted);padding:6px 10px}
.kb-side-group ul{list-style:none}
.kb-side-group li a{display:block;font-size:13.5px;color:var(--text-soft);padding:6px 10px;border-radius:8px;
  border-left:2px solid transparent}
.kb-side-group li a:hover{color:var(--text);background:var(--bg-2);text-decoration:none}
.kb-side-group li a.is-active{color:var(--accent);background:var(--bg-2);
  border-left-color:var(--accent);font-weight:600}
.kb-sidebar-scrim{display:none}

/* ---------- Article ---------- */
.kb-crumbs{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);margin-bottom:18px;flex-wrap:wrap}
.kb-crumbs a{color:var(--text-soft)}
.kb-crumbs .kb-ic{color:var(--muted)}
.kb-article-head{display:flex;gap:16px;align-items:flex-start;margin-bottom:8px}
.kb-section-badge{width:52px;height:52px;flex:none;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:var(--accent-wash,var(--bg-2));color:var(--card-accent,var(--accent))}
.kb-article-head h1{font-size:28px;font-weight:800;letter-spacing:-.02em}
.kb-lede{color:var(--text-soft);font-size:16px;margin-top:6px}

.kb-article-layout{display:flex;gap:36px;align-items:flex-start;margin-top:26px}
.kb-article{flex:1;min-width:0}
.kb-article h1{font-size:30px;font-weight:800;letter-spacing:-.02em}
.kb-article>.kb-lede{margin:8px 0 8px}

.kb-prose{margin-top:20px}
.kb-prose h2{font-size:20px;font-weight:700;margin:34px 0 12px;padding-top:6px;scroll-margin-top:80px}
.kb-prose h3{font-size:16px;font-weight:700;margin:22px 0 8px}
.kb-prose p{margin:12px 0;color:var(--text)}
.kb-prose ul,.kb-prose ol{margin:12px 0 12px 22px}
.kb-prose li{margin:6px 0}
.kb-prose strong{font-weight:700}
.kb-prose code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:5px;padding:1px 6px}
.kb-prose a{font-weight:500}
.kb-prose table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px;overflow:hidden;
  border:1px solid var(--line);border-radius:10px}
.kb-prose th,.kb-prose td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.kb-prose th{background:var(--bg-2);font-weight:600;color:var(--text-soft)}
.kb-prose tr:last-child td{border-bottom:none}

/* Guide steps */
.kb-guide-step{display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--line-soft)}
.kb-guide-step:first-child{border-top:none}
.kb-guide-step-n{width:28px;height:28px;flex:none;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--amber-wash);color:var(--amber);font-weight:800;font-size:14px}
.kb-guide-step-body h3{margin:2px 0 6px;font-size:16px}
.kb-guide-step-body p{margin:6px 0}

/* Callouts */
.kb-callout{display:flex;gap:12px;align-items:flex-start;margin:18px 0;padding:14px 16px;border-radius:12px;
  border:1px solid var(--line);background:var(--bg-2);font-size:14px}
.kb-callout .kb-callout-ic{margin-top:1px}
.kb-callout-info{border-color:color-mix(in srgb,var(--sky) 35%,var(--line))}
.kb-callout-info .kb-callout-ic{color:var(--sky)}
.kb-callout-tip{border-color:color-mix(in srgb,var(--green) 35%,var(--line))}
.kb-callout-tip .kb-callout-ic{color:var(--green)}
.kb-callout-warn{border-color:color-mix(in srgb,var(--amber) 45%,var(--line))}
.kb-callout-warn .kb-callout-ic{color:var(--amber)}

/* Prev / next */
.kb-prevnext{display:flex;gap:14px;margin-top:40px;padding-top:22px;border-top:1px solid var(--line)}
.kb-pn{flex:1;display:flex;flex-direction:column;gap:4px;padding:14px 16px;border:1px solid var(--line);
  border-radius:12px;background:var(--card)}
.kb-pn:hover{border-color:var(--accent);text-decoration:none}
.kb-pn-next{text-align:right;align-items:flex-end}
.kb-pn-label{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:5px}
.kb-pn-title{font-weight:600;color:var(--text)}
.kb-article-foot{margin-top:26px;padding:14px 16px;background:var(--bg-2);border:1px solid var(--line);
  border-radius:12px;color:var(--text-soft);font-size:13.5px}

/* On this page */
.kb-onthispage{width:210px;flex:none;position:sticky;top:80px;align-self:flex-start;font-size:13px}
.kb-otp-head{font-weight:700;font-size:12px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.kb-onthispage ul{list-style:none}
.kb-onthispage li a{display:block;color:var(--text-soft);padding:5px 0 5px 12px;border-left:2px solid var(--line);
  line-height:1.4}
.kb-onthispage li a:hover{color:var(--text);border-left-color:var(--accent);text-decoration:none}

/* Section list */
.kb-section-list{margin-top:24px;display:flex;flex-direction:column;gap:10px}
.kb-section-item{display:flex;align-items:center;gap:14px;padding:16px 18px;background:var(--card);
  border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}
.kb-section-item:hover{border-color:var(--accent);text-decoration:none;transform:translateX(2px)}
.kb-step-n{width:30px;height:30px;flex:none;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--amber-wash);color:var(--amber);font-weight:800;font-size:14px}
.kb-section-item-text{flex:1;min-width:0;display:flex;flex-direction:column}
.kb-section-item-title{font-weight:700;color:var(--text)}
.kb-section-item-sum{font-size:13.5px;color:var(--text-soft)}
.kb-section-item>.kb-ic{color:var(--muted)}

/* ---------- Search overlay ---------- */
.kb-search-overlay{display:none;position:fixed;inset:0;z-index:80;background:rgba(10,15,25,.5);
  backdrop-filter:blur(3px);padding-top:12vh}
.kb-search-overlay.open{display:block}
.kb-search-box{max-width:600px;margin:0 auto;background:var(--card);border:1px solid var(--line);
  border-radius:16px;box-shadow:0 24px 60px rgba(0,0,0,.35);overflow:hidden}
.kb-search-input-row{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line)}
.kb-search-input-row .kb-ic{color:var(--muted)}
#kb-search-input{flex:1;border:none;background:none;outline:none;font-size:16px;color:var(--text);font-family:var(--sans)}
.kb-search-close{border:none;background:var(--bg-2);color:var(--muted);width:28px;height:28px;border-radius:7px;cursor:pointer;
  display:flex;align-items:center;justify-content:center}
.kb-search-results{max-height:56vh;overflow-y:auto;padding:8px}
.kb-search-hint{padding:18px;text-align:center;color:var(--muted);font-size:14px}
.kb-search-hit{display:block;padding:11px 12px;border-radius:10px}
.kb-search-hit:hover{background:var(--bg-2);text-decoration:none}
.kb-search-hit .kb-hit-sec{font-size:11px;color:var(--accent);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.kb-search-hit .kb-hit-title{font-weight:600;color:var(--text);margin-top:1px}
.kb-search-hit .kb-hit-sum{font-size:13px;color:var(--text-soft)}

/* ---------- Footer ---------- */
.kb-footer{border-top:1px solid var(--line);margin-top:40px}
.kb-footer-in{max-width:var(--maxw);margin:0 auto;padding:22px 30px;display:flex;align-items:center;gap:18px;
  flex-wrap:wrap;color:var(--text-soft);font-size:13px}
.kb-footer-in>div:first-child{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--text)}
.kb-footer-links{display:flex;gap:16px}
.kb-footer-links a{color:var(--text-soft)}
.kb-credit{margin-left:auto;color:var(--muted)}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .kb-cards{grid-template-columns:repeat(2,1fr)}
  .kb-onthispage{display:none}
}
@media (max-width:820px){
  .kb-topnav{display:none}
  .kb-applink span{display:none}
  .kb-search-btn{min-width:0}
  .kb-search-btn span,.kb-search-btn kbd{display:none}
  .kb-burger{display:flex}
  .kb-sidebar{position:fixed;top:60px;left:0;z-index:60;background:var(--bg);width:280px;
    transform:translateX(-100%);transition:transform .2s ease;box-shadow:var(--shadow)}
  .kb-sidebar.open{transform:none}
  .kb-sidebar-scrim.open{display:block;position:fixed;inset:60px 0 0;z-index:55;background:rgba(6,10,20,.5)}
  .kb-main{padding:22px 18px 50px}
  .kb-cards{grid-template-columns:1fr}
  .kb-hero h1{font-size:27px}
}
@media (max-width:520px){
  .kb-header{gap:10px;padding:0 14px}
  .kb-brand-sub{display:none}
  .kb-footer-in{flex-direction:column;align-items:flex-start;gap:10px}
  .kb-credit{margin-left:0}
  .kb-prevnext{flex-direction:column}
}