/* Dell design system — Dell Deskside Agentic AI docs site.
   Dell brand color tokens.
   Layout inspired by build.nvidia.com/spark: top navbar, hero, card grid. */
:root {
  --dell-blue: #0672CB;
  --dell-blue-dark: #00468B;
  --navy: #1D2553;
  --cosmos: #1D2C3B;
  --mid-navy: #174889;
  --ocean: #00468B;
  --raven: #40586D;
  --mist: #C5D4E3;
  --quartz: #F0F0F0;
  --titanium: #D2D2D2;
  --white: #FFFFFF;
  --orange: #E97132;
  --teal: #0B7C84;
  --green: #196B24;
  --ink-2: #555555;
  --ink-3: #666666;
  --font-sans: "Roboto", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --font-mono: "Roboto Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --nav-w: 280px;
  --top-h: 60px;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(29,44,59,.06), 0 6px 20px rgba(29,44,59,.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--cosmos);
  background: var(--quartz);
  line-height: 1.65;
}

/* ---------------------------------------------------------------- Top navbar */
.topnav {
  position: sticky; top: 0; z-index: 30;
  height: var(--top-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  background: var(--white);
  border-bottom: 1px solid var(--titanium);
  box-shadow: 0 1px 3px rgba(29,44,59,.05);
}
.topnav-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.topnav-brand img { height: 24px; width: auto; }
.topnav-title {
  font-size: .98rem; font-weight: 700; color: var(--cosmos);
  padding-left: 12px; border-left: 1px solid var(--titanium); line-height: 1;
}
.topnav-right { display: flex; align-items: center; gap: 16px; }

/* ----------------------------------------------------------------- Hero (home) */
.hero {
  background:
    radial-gradient(1200px 400px at 15% -20%, rgba(6,114,203,.18), transparent 60%),
    linear-gradient(135deg, var(--navy) 0%, var(--cosmos) 60%, var(--dell-blue-dark) 130%);
  color: var(--white);
  padding: 72px 24px 84px;
}
.hero-inner { max-width: 1080px; margin: 0 auto; }
.hero-eyebrow {
  font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: #8fc4ff; margin: 0 0 18px;
}
.hero h1 {
  font-size: clamp(2rem, 4.2vw, 3.1rem); font-weight: 700; line-height: 1.12;
  margin: 0 0 18px; max-width: 18ch;
}
.hero-sub { font-size: 1.12rem; color: #d5e2ef; max-width: 62ch; margin: 0 0 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 600; font-size: .95rem;
  padding: 12px 24px; border-radius: 8px; transition: all .15s ease;
}
.btn-primary { background: var(--dell-blue); color: var(--white); }
.btn-primary:hover { background: #1a83db; transform: translateY(-1px); }
.btn-ghost { background: rgba(255,255,255,.08); color: var(--white); border: 1px solid rgba(255,255,255,.35); }
.btn-ghost:hover { background: rgba(255,255,255,.16); }
.hero-modehint {
  font-size: .9rem; color: #b9cbdd; max-width: 70ch; margin: 0;
  padding-top: 18px; border-top: 1px solid rgba(255,255,255,.14);
}
.hero-modehint strong { color: var(--white); }

/* ------------------------------------------------------------ Landing cards */
.home-main { max-width: 1080px; margin: 0 auto; padding: 48px 24px 24px; }
.card-section { margin-bottom: 48px; }
.section-head h2 {
  font-size: 1.5rem; font-weight: 700; color: var(--cosmos); margin: 0 0 6px;
  display: flex; align-items: center; gap: 10px;
}
.section-head p { color: var(--ink-2); margin: 0 0 22px; max-width: 74ch; }
.section-tag, .nav-tag {
  font-size: .62rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: var(--orange); background: rgba(233,113,50,.12);
  padding: 3px 9px; border-radius: 999px; vertical-align: middle;
}
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card {
  display: flex; flex-direction: column; gap: 6px;
  background: var(--white); border: 1px solid var(--titanium); border-radius: var(--radius);
  padding: 20px 20px 18px; text-decoration: none; color: inherit;
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--dell-blue); box-shadow: var(--shadow); transform: translateY(-2px); }
.card.sub { background: #F7FAFD; }
.card-title { font-weight: 700; color: var(--dell-blue); font-size: 1.02rem; }
.card-desc { font-size: .88rem; color: var(--ink-2); line-height: 1.5; }

/* ------------------------------------------------------------- Article layout */
.layout { display: grid; grid-template-columns: var(--nav-w) 1fr; }
.sidebar {
  background: var(--white); border-right: 1px solid var(--titanium);
  padding: 20px 14px 48px;
  position: sticky; top: var(--top-h); align-self: start;
  max-height: calc(100vh - var(--top-h)); overflow-y: auto;
}
.nav-group { margin: 4px 0 12px; }
.nav-group-title {
  font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .6px;
  color: var(--raven); padding: 0 10px; margin-bottom: 6px;
  display: flex; align-items: center; gap: 6px;
}
.nav a {
  display: block; padding: 6px 10px; border-radius: 6px; font-size: .86rem;
  color: var(--cosmos); text-decoration: none; border-left: 3px solid transparent;
}
.nav a:hover { background: var(--quartz); color: var(--dell-blue); border-left-color: var(--mist); }
.nav a.active { background: rgba(6,114,203,.10); color: var(--dell-blue); border-left-color: var(--dell-blue); font-weight: 600; }

.content { min-width: 0; }
.topbar {
  position: sticky; top: var(--top-h); z-index: 5;
  background: linear-gradient(135deg, var(--white) 0%, var(--quartz) 60%, var(--mist) 130%);
  border-bottom: 1px solid rgba(6,114,203,.15);
  padding: 11px 32px; font-size: .78rem; color: var(--raven);
}
.topbar a { color: var(--dell-blue); text-decoration: none; }

.article { max-width: 900px; padding: 28px 32px 90px; }
.article h1 { font-size: 1.9rem; color: var(--cosmos); margin: .2em 0 .5em; }
.article h2 { font-size: 1.35rem; color: var(--cosmos); margin-top: 1.6em; padding-bottom: .25em; border-bottom: 1px solid var(--titanium); }
.article h3 { font-size: 1.08rem; color: var(--mid-navy); margin-top: 1.3em; }
.article a { color: var(--dell-blue); }
.article code { font-family: var(--font-mono); background: var(--quartz); padding: .12em .38em; border-radius: 4px; font-size: .88em; }
.article pre { background: #0f1b2a; color: #dbe6f2; padding: 16px 18px; border-radius: 8px; overflow-x: auto; border: 1px solid #22344a; line-height: 1.5; }
.article pre code { background: none; color: inherit; padding: 0; }
.article table { border-collapse: collapse; width: 100%; margin: 1em 0; font-size: .9rem; }
.article th { background: var(--ocean); color: var(--white); text-align: left; padding: 8px 10px; }
.article td { border: 1px solid var(--titanium); padding: 7px 10px; }
.article tr:nth-child(even) td { background: #F0F4F8; }
.article img { max-width: 100%; height: auto; border-radius: 8px; }
.article blockquote { border-left: 4px solid var(--dell-blue); margin: 1em 0; padding: .4em 1em; background: var(--white); color: var(--raven); border-radius: 0 8px 8px 0; }
.badge { display: inline-block; font-size: .7rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: rgba(6,114,203,.12); color: var(--dell-blue); }

.ext-note { font-size: .9rem; color: var(--ink-2); }
.embedded-html { border: 1px solid var(--titanium); border-radius: 8px; overflow: hidden; }

/* ----------------------------------------------------------------- Footer */
.site-footer {
  display: flex; align-items: center; gap: 12px; justify-content: center;
  padding: 28px 24px; border-top: 1px solid var(--titanium);
  background: var(--white); color: var(--raven); font-size: .82rem;
}
.site-footer img { height: 18px; }

/* ----------------------------------------------------------------- Responsive */
@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; max-height: none; border-right: none; border-bottom: 1px solid var(--titanium); }
  .topnav-title { display: none; }
  .hero { padding: 48px 20px 56px; }
}

/* Nested sidebar items (subpages under a solution template) */
.nav a.sub { padding-left: calc(var(--pad, 12px) + 0.9em); font-size: 0.93em; }

/* Article tabs (IDE integration) */
.tabbar { display: flex; flex-wrap: wrap; gap: 2px; margin: 22px 0 0; border-bottom: 2px solid var(--mist, #dbe6f1); }
.tabbar button { appearance: none; background: none; border: 1px solid transparent; border-bottom: none; border-radius: 6px 6px 0 0; padding: 8px 14px; font: inherit; font-size: 0.95rem; color: #445; cursor: pointer; }
.tabbar button:hover { background: var(--quartz, #f2f6fa); color: var(--dell-blue, #0672cb); }
.tabbar button[aria-selected="true"] { color: var(--dell-blue, #0672cb); font-weight: 600; background: #fff; border-color: #cfdcec; margin-bottom: -2px; border-bottom: 2px solid var(--dell-blue, #0672cb); }
.tabpanel { padding-top: 8px; }
.tabpanel[hidden] { display: none; }

/* ============ active-set picker (picker.js) ============ */
.ds-picker { position: sticky; top: 0; z-index: 20; background: var(--card, #fff);
  border: 1px solid var(--titanium, #dbe1e6); border-left: 4px solid var(--dell-blue);
  border-radius: 8px; padding: 10px 14px; margin: 0 0 1.2em;
  box-shadow: 0 2px 8px rgba(29, 37, 83, .08); }
.ds-picker h2 { margin: 0; font-size: 1rem; border: none; padding: 0; }
.ds-picker .ds-note { font-weight: 400; font-size: .78rem; color: var(--raven, #40586d); }
.ds-picker .ds-fields { display: flex; gap: .6rem; flex-wrap: wrap; align-items: end; margin-top: .5em; }
.ds-picker label { display: flex; flex-direction: column; font-size: .72rem;
  color: var(--raven, #40586d); flex: 1 1 10rem; min-width: 8.5rem; gap: 2px; }
.ds-picker input, .ds-picker select { border: 1px solid var(--titanium, #dbe1e6); border-radius: 6px;
  padding: .35rem .45rem; font-size: .85rem; font-family: "Roboto Mono", ui-monospace, Menlo, monospace;
  background: #fbfcfd; color: var(--cosmos, #1d2c3b); }
.ds-picker input:focus, .ds-picker select:focus { outline: 2px solid var(--dell-blue); border-color: transparent; }
.ds-picker .ds-hint { margin: .5em 0 0; font-size: .78rem; color: var(--raven, #40586d); }
.ds-picker .ds-hint code { font-size: .75rem; }

/* ---- syntax highlighting (dark panel palette) ---- */
.article pre .tok-c { color: #7f93a8; font-style: italic; }
.article pre .tok-s { color: #a5e075; }
.article pre .tok-n { color: #f9a870; }
.article pre .tok-f { color: #82aaff; }
.article pre .tok-v { color: #ffcb6b; }
.article pre .tok-k { color: #7fdbff; }
.article pre .tok-b { color: #f78c6c; }
.article pre .tok-kw { color: #c792ea; font-weight: 500; }
.article pre .tok-fn { color: #5fe3c3; }
.article pre .tok-o { color: #8fa3b8; }

/* ---- Recipe Configuration: one colour per variable set ---- */
:root { --ds-p: #0672CB; --ds-m: #8e44ad; --ds-h: #E97132; --ds-o: #159a6b; --ds-k: #d6336c; }
mark.ds-var { color: inherit; border-radius: 3px; padding: 0 2px; border-bottom: 2px solid; }
.ds-v-p { --c: var(--ds-p); } .ds-v-m { --c: var(--ds-m); } .ds-v-h { --c: var(--ds-h); } .ds-v-o { --c: var(--ds-o); } .ds-v-k { --c: var(--ds-k); }
mark.ds-var { border-color: var(--c); background: color-mix(in srgb, var(--c) 22%, transparent); }
.article pre mark.ds-var { color: #fff; background: color-mix(in srgb, var(--c) 38%, transparent); }
.article pre mark.ds-var span { color: inherit; }
.ds-picker label.ds-v-p, .ds-picker label.ds-v-m, .ds-picker label.ds-v-h, .ds-picker label.ds-v-o, .ds-picker label.ds-v-k {
  border-left: 4px solid var(--c); padding-left: .5rem; }
.ds-picker select, .ds-picker input { border-color: color-mix(in srgb, var(--c, #999) 55%, #dbe1e6); }
.ds-picker .ds-legend { margin: .55em 0 0; font-size: .74rem; color: var(--raven, #40586d); }
.ds-picker .ds-legend mark.ds-var { margin-right: .35em; }

/* ---- linkable headings ---- */
.article .ds-anchor { cursor: pointer; position: relative; scroll-margin-top: 1rem; }
.article .ds-anchor::after { content: "\1F517"; font-size: .6em; margin-left: .5em; opacity: 0; transition: opacity .15s; vertical-align: middle; }
.article .ds-anchor:hover::after { opacity: .55; }
.article .ds-anchor:target { background: linear-gradient(90deg, rgba(6,114,203,.12), transparent); }
.ds-toast { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%) translateY(20px); background: #0f1b2a; color: #fff;
  padding: 8px 16px; border-radius: 8px; font-size: .85rem; opacity: 0; pointer-events: none; transition: all .2s; z-index: 50; }
.ds-toast.on { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---- measured scaling tables (section 7) ---- */
.ds-measured { border: 1px solid var(--titanium, #dbe1e6); border-radius: 8px; padding: .4rem 1rem 1rem; margin: 1rem 0; background: #fbfcfd; }
.ds-measured h4 { margin: .6em 0 .2em; }
.ds-measured table.ds-m { width: auto; min-width: 60%; }
.ds-measured tr.below td { color: #8a5a00; }
.ds-measured .ds-m-cap { margin: .8em 0 .2em; font-size: .85rem; color: var(--raven, #40586d); }
.ds-measured .ds-m-dev { font-size: .85rem; }