/* The MCP Guide - dark developer-documentation theme.
   Three-column layout: left section nav, reading column, right on-this-page.
   Deliberately distinct from the card-grid and warm-handbook sibling sites. */

:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #1c2230;
  --border: #21262d;
  --border-2: #30363d;
  --text: #e6edf3;
  --muted: #9aa5b1;
  --faint: #6e7681;
  --accent: #a371f7;      /* violet */
  --accent-2: #56d4c4;    /* teal, for inline code accents */
  --link: #79b8ff;
  --code-bg: #12171f;
  --topbar-h: 56px;
  --nav-w: 270px;
  --toc-w: 220px;
  --mono: "JetBrains Mono", "SF Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 20px;
  padding: 0 22px;
  background: rgba(13,17,23,0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topbar .brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600; color: var(--text); font-size: 16px;
}
.topbar .brand .logo {
  font-family: var(--mono); color: var(--accent); font-weight: 700;
  border: 1px solid var(--border-2); border-radius: 6px; padding: 3px 8px; font-size: 13px;
}
.topbar .brand:hover { text-decoration: none; }
.topbar .search {
  margin-left: auto; background: var(--surface); border: 1px solid var(--border-2);
  border-radius: 8px; color: var(--faint); font-size: 13px; padding: 7px 12px;
  min-width: 200px; font-family: var(--mono);
}
.topbar .ghlink { color: var(--muted); font-size: 14px; }
.topbar .search:focus { outline: none; border-color: var(--accent); color: var(--text); }

/* Search results dropdown */
.search-results {
  position: fixed; z-index: 100;
  background: var(--surface); border: 1px solid var(--border-2); border-radius: 8px;
  box-shadow: 0 12px 34px rgba(0,0,0,0.45);
  overflow: hidden; max-height: 62vh; overflow-y: auto;
}
.search-results a {
  display: flex; justify-content: space-between; gap: 14px; align-items: baseline;
  padding: 10px 14px; color: var(--text); border-bottom: 1px solid var(--border);
}
.search-results a:last-child { border-bottom: none; }
.search-results a:hover { background: var(--surface-2); text-decoration: none; }
.search-results .sr-t { font-size: 14px; }
.search-results .sr-s { font-family: var(--mono); font-size: 11px; color: var(--faint); white-space: nowrap; }
.search-results .sr-empty { padding: 12px 14px; color: var(--faint); font-size: 14px; }

/* Layout */
.layout {
  display: grid;
  grid-template-columns: var(--nav-w) minmax(0, 1fr) var(--toc-w);
  max-width: 1400px; margin: 0 auto;
  align-items: start;
}

/* Left nav */
.leftnav {
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  padding: 28px 18px 60px;
  border-right: 1px solid var(--border);
}
.nav-group { margin-bottom: 24px; }
.nav-group h5 {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--faint); margin: 0 0 10px; padding-left: 10px;
}
.nav-group a {
  display: block; color: var(--muted); font-size: 14px;
  padding: 6px 10px; border-radius: 6px; line-height: 1.35;
}
.nav-group a:hover { background: var(--surface); color: var(--text); text-decoration: none; }
.nav-group a.active { background: rgba(163,113,247,0.14); color: #d2c4ff; font-weight: 500; box-shadow: inset 2px 0 0 var(--accent); }

/* Content */
.content { padding: 40px 48px 96px; min-width: 0; }
.reading { max-width: 780px; }
.eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px;
}
.content h1 { font-size: 34px; line-height: 1.2; margin: 0 0 16px; letter-spacing: -0.01em; }
.lead { font-size: 18px; color: #c9d3de; margin: 0 0 32px; }
.content h2 {
  font-size: 22px; margin: 42px 0 14px; padding-top: 10px; letter-spacing: -0.01em;
  scroll-margin-top: calc(var(--topbar-h) + 16px);
}
.content h3 { font-size: 17px; margin: 26px 0 10px; }
.content p { margin: 0 0 16px; }
.content ul, .content ol { margin: 0 0 16px; padding-left: 22px; }
.content li { margin-bottom: 7px; }
.content strong { color: #fff; font-weight: 600; }

.anchor { color: var(--faint); margin-left: 8px; opacity: 0; font-weight: 400; text-decoration: none; }
.content h2:hover .anchor { opacity: 1; }

/* Inline + block code */
code {
  font-family: var(--mono); font-size: 13.5px;
  background: var(--surface-2); color: var(--accent-2);
  padding: 2px 6px; border-radius: 5px; border: 1px solid var(--border);
}
pre {
  background: var(--code-bg); border: 1px solid var(--border-2); border-radius: 10px;
  padding: 16px 18px; overflow-x: auto; margin: 0 0 20px; position: relative;
}
pre code { background: none; border: none; color: #d6dee8; padding: 0; font-size: 13px; line-height: 1.65; display: block; }
pre .lang {
  position: absolute; top: 8px; right: 12px; font-family: var(--mono); font-size: 11px;
  color: var(--faint); text-transform: uppercase; letter-spacing: 0.06em;
}
/* tiny token coloring via spans the generator can emit */
.tok-c { color: #7d8590; font-style: italic; }   /* comment */
.tok-s { color: #7ee787; }                        /* string */
.tok-k { color: #ff7b72; }                        /* keyword */
.tok-p { color: #d2a8ff; }                        /* punctuation/name */

/* Callouts */
.callout { border: 1px solid var(--border-2); border-left-width: 3px; border-radius: 8px; padding: 14px 18px; margin: 0 0 20px; font-size: 15px; background: var(--surface); }
.callout .k { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; display: block; margin-bottom: 4px; }
.callout.note { border-left-color: var(--link); }
.callout.note .k { color: var(--link); }
.callout.warn { border-left-color: #e3b341; }
.callout.warn .k { color: #e3b341; }
.callout.tip { border-left-color: var(--accent-2); }
.callout.tip .k { color: var(--accent-2); }

/* Right on-this-page */
.toc {
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto; padding: 40px 18px 60px;
}
.toc h6 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); margin: 0 0 12px; }
.toc a { display: block; color: var(--muted); font-size: 13px; padding: 4px 0 4px 12px; border-left: 2px solid var(--border); line-height: 1.4; }
.toc a:hover { color: var(--text); text-decoration: none; border-left-color: var(--accent); }

/* Further reading + pager */
.further { margin: 44px 0 0; border-top: 1px solid var(--border); padding-top: 24px; }
.further h3 { font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--faint); margin: 0 0 12px; }
.further ul { list-style: none; padding: 0; margin: 0; }
.further li { margin-bottom: 12px; font-size: 14px; }
.further .src { color: var(--faint); font-size: 12px; font-family: var(--mono); }
.further .d { display: block; color: var(--muted); font-size: 13.5px; margin-top: 2px; }

.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 40px; border-top: 1px solid var(--border); padding-top: 22px; }
.pager a { max-width: 48%; }
.pager .dir { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--faint); }
.pager .t { color: var(--text); font-weight: 500; }
.pager .next { text-align: right; margin-left: auto; }
.pager a:hover .t { color: var(--accent); }

/* Home hero */
.hero { padding: 60px 0 20px; }
.hero h1 { font-size: 44px; line-height: 1.1; margin: 0 0 18px; letter-spacing: -0.02em; }
.hero .lead { font-size: 20px; max-width: 680px; }
.home-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr)); gap: 16px; margin: 32px 0; }
.home-card { border: 1px solid var(--border-2); border-radius: 10px; padding: 18px; background: var(--surface); }
.home-card h3 { margin: 0 0 6px; font-size: 16px; }
.home-card p { margin: 0 0 10px; color: var(--muted); font-size: 14px; }
.home-card a { font-family: var(--mono); font-size: 13px; }

.navtoggle { display: none; }

@media (max-width: 1100px) {
  .layout { grid-template-columns: var(--nav-w) minmax(0,1fr); }
  .toc { display: none; }
}
@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; }
  .leftnav { position: static; height: auto; border-right: none; border-bottom: 1px solid var(--border); display: none; }
  .leftnav.open { display: block; }
  .navtoggle { display: inline-block; background: var(--surface); color: var(--text); border: 1px solid var(--border-2); border-radius: 6px; padding: 6px 12px; font-size: 13px; font-family: var(--mono); cursor: pointer; }
  .content { padding: 28px 20px 72px; }
  .hero h1 { font-size: 32px; }
  .topbar .search { display: none; }
}