/* HPRC documentation stylesheet — self-contained, offline, no external fonts. */
:root {
  --bg: #ffffff;
  --bg-alt: #f6f8fa;
  --text: #1f2430;
  --muted: #5b6675;
  --border: #e3e8ef;
  --accent: #4f46e5;        /* indigo */
  --accent-2: #0d9488;      /* teal  */
  --accent-soft: #eef0fe;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --code-dim: #94a3b8;
  --warn-bg: #fff7ed;
  --warn-border: #fb923c;
  --note-bg: #ecfeff;
  --note-border: #06b6d4;
  --ok-bg: #ecfdf5;
  --ok-border: #10b981;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

/* Layout */
.layout { display: grid; grid-template-columns: 280px minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; align-self: start; height: 100vh; overflow-y: auto;
  background: var(--bg-alt); border-right: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
}
.content { padding: 2.5rem clamp(1rem, 4vw, 4rem); max-width: 980px; }

/* Brand */
.brand { display: flex; align-items: center; gap: .6rem; margin-bottom: .25rem; text-decoration: none; color: var(--text); }
.brand .logo {
  width: 34px; height: 34px; border-radius: 8px; flex: 0 0 auto;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 800; display: grid; place-items: center; font-size: .85rem; letter-spacing: -.5px;
}
.brand .name { font-weight: 800; font-size: 1.05rem; }
.brand .tag { color: var(--muted); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; }

/* Sidebar nav */
.nav-group { margin-top: 1.4rem; }
.nav-group h4 { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 0 0 .5rem; }
.nav-group a { display: block; padding: .28rem .5rem; border-radius: 6px; color: var(--text); text-decoration: none; font-size: .9rem; }
.nav-group a:hover { background: var(--accent-soft); color: var(--accent); }
.nav-doclinks a { font-weight: 600; }

/* Typography */
h1 { font-size: 2.1rem; line-height: 1.2; margin: 0 0 .4rem; letter-spacing: -.02em; }
h2 { font-size: 1.5rem; margin: 2.6rem 0 .8rem; padding-top: .4rem; border-top: 1px solid var(--border); letter-spacing: -.01em; }
h3 { font-size: 1.15rem; margin: 1.8rem 0 .6rem; }
h4 { font-size: 1rem; margin: 1.2rem 0 .4rem; }
p { margin: .7rem 0; }
a { color: var(--accent); }
.lead { font-size: 1.15rem; color: var(--muted); margin: .5rem 0 1.5rem; }
.eyebrow { color: var(--accent); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; font-size: .75rem; }
hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }
ul, ol { padding-left: 1.3rem; }
li { margin: .3rem 0; }
code { font-family: var(--mono); font-size: .88em; background: var(--accent-soft); color: #3730a3; padding: .12em .4em; border-radius: 5px; }

/* Code blocks */
pre {
  background: var(--code-bg); color: var(--code-text); border-radius: var(--radius);
  padding: 1rem 1.1rem; overflow-x: auto; font-family: var(--mono); font-size: .85rem; line-height: 1.55;
  margin: 1rem 0; border: 1px solid #1e293b;
}
pre code { background: none; color: inherit; padding: 0; font-size: inherit; }
.code-card { margin: 1.2rem 0; border-radius: var(--radius); overflow: hidden; border: 1px solid #1e293b; }
.code-card .code-head {
  background: #1e293b; color: var(--code-dim); font-family: var(--mono); font-size: .72rem;
  padding: .45rem .9rem; letter-spacing: .04em; display: flex; justify-content: space-between; align-items: center;
}
.code-card .code-head .lang { color: var(--accent-2); font-weight: 700; }
.code-card pre { margin: 0; border: none; border-radius: 0; }

/* Diagram blocks (ASCII art) */
.diagram {
  background: var(--bg-alt); color: var(--text); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.1rem; overflow-x: auto;
  font-family: var(--mono); font-size: .76rem; line-height: 1.45; white-space: pre;
}

/* Callouts */
.callout { border-left: 4px solid var(--note-border); background: var(--note-bg); padding: .8rem 1rem; border-radius: 8px; margin: 1.2rem 0; }
.callout.warn { border-color: var(--warn-border); background: var(--warn-bg); }
.callout.ok { border-color: var(--ok-border); background: var(--ok-bg); }
.callout strong { display: inline; }
.callout p { margin: .3rem 0; }

/* Tables */
table { width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: .9rem; }
th, td { text-align: left; padding: .55rem .7rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--bg-alt); font-weight: 700; }
tr:hover td { background: var(--accent-soft); }

/* Pills / badges */
.pill { display: inline-block; font-size: .72rem; font-weight: 700; padding: .15rem .55rem; border-radius: 999px; background: var(--accent-soft); color: var(--accent); margin-right: .3rem; }
.pill.teal { background: #d9f6f1; color: var(--accent-2); }
.pill.gray { background: #eef1f5; color: var(--muted); }

/* Feature grid (landing) */
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin: 1.5rem 0; }
.card { border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem 1.2rem; background: var(--bg); }
.card h3 { margin-top: 0; }
.card .ic { font-size: 1.4rem; }
.doc-cards { display: grid; gap: 1.2rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin: 2rem 0; }
.doc-cards a.card { text-decoration: none; color: inherit; transition: border-color .15s, transform .15s; }
.doc-cards a.card:hover { border-color: var(--accent); transform: translateY(-2px); }

/* Steps */
.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps > li { counter-increment: step; position: relative; padding: .2rem 0 .6rem 2.6rem; margin: 0; }
.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: .1rem;
  width: 1.8rem; height: 1.8rem; border-radius: 50%; background: var(--accent); color: #fff;
  display: grid; place-items: center; font-weight: 700; font-size: .85rem;
}

/* Footer */
.foot { margin-top: 3rem; padding-top: 1.2rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .85rem; }

/* TOC top-of-page utility on mobile */
.topbar { display: none; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; border-right: none; border-bottom: 1px solid var(--border); }
  .content { padding: 1.5rem 1.1rem; }
}

/* Anchor offset for sticky headings */
:target { scroll-margin-top: 1rem; }