/* ══════════════════════════════════════════════════════════════════════════
   RVAP · Frontier Fabric AgentOps RVAS — shared site stylesheet
   Brand tokens, nav, footer, prose/doc shell, code, builder.
   Kept in sync with the tokens used inline in index.html.
   ══════════════════════════════════════════════════════════════════════════ */

:root {
  /* ── RVAP surfaces (light) ── */
  --bg:           #F5F8FE;
  --surface:      #FFFFFF;
  --surface-2:    #FAFBFD;
  --surface-3:    #F0F4FB;
  --border:       #E3E6ED;
  --border-md:    #D4DBE8;
  --border-lg:    #C4CDDE;

  /* ── RVAP core palette ── */
  --rvap-blue:    #1A77E3;
  --ms-blue:      #0078D4;
  --deep-navy:    #032254;
  --teal:         #14868A;
  --purple:       #504092;

  --accent:       #1A77E3;
  --accent-dim:   rgba(26,119,227,0.10);

  /* category palette */
  --challenges:       #1A77E3;
  --challenges-dim:   rgba(26,119,227,0.10);
  --resources:        #0078D4;
  --resources-dim:    rgba(0,120,212,0.10);
  --docs:             #14868A;
  --docs-dim:         rgba(20,134,138,0.10);
  --coach:            #504092;
  --coach-dim:        rgba(80,64,146,0.10);

  --text:         #032254;
  --text-2:       #47494E;
  --text-2b:      #6B7280;
  --text-3:       #98A2B3;

  --ff-display:   "Aptos Display", "Outfit", "Segoe UI", system-ui, sans-serif;
  --ff-body:      "Aptos", "Inter", "Segoe UI", system-ui, sans-serif;
  --ff-mono:      "Cascadia Code", "JetBrains Mono", "Fira Code", monospace;

  --hero-grad:    linear-gradient(135deg, #032254 0%, #0F3A7A 55%, #1A77E3 100%);
  --shadow-card:  0 1px 3px rgba(3,34,84,0.08), 0 8px 22px rgba(3,34,84,0.07);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-2);
  font-family: var(--ff-body);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Dot-grid texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, rgba(3,34,84,0.045) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  z-index: 0;
}

/* Ambient glow orbs */
.orb { position: fixed; border-radius: 50%; filter: blur(120px); pointer-events: none; z-index: 0; }
.orb-1 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(26,119,227,0.10) 0%, transparent 70%);
  top: -220px; right: -160px;
}
.orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(20,134,138,0.08) 0%, transparent 70%);
  bottom: 5%; left: -100px;
}

/* ── Layout ── */
.container { position: relative; z-index: 1; max-width: 1380px; margin: 0 auto; padding: 0 48px; }

/* Navigation, shared buttons, and footer are provided by shell.css. */

/* ════════════════════════════════════════ DOC SHELL ════════════════════════════════════════ */
.doc-wrap { position: relative; z-index: 1; }
.doc-shell {
  max-width: 1200px; margin: 0 auto; padding: 0 48px;
  display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 44px;
  align-items: start;
}
.doc-shell.no-toc { grid-template-columns: minmax(0, 1fr); max-width: 900px; }

/* Sidebar / TOC */
.toc { position: sticky; top: 24px; align-self: start; padding: 24px 0; font-size: 13px; }
.toc-title {
  font-family: var(--ff-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-2b); margin-bottom: 12px;
}
.toc ul { list-style: none; border-left: 2px solid var(--border); }
.toc li a {
  display: block; padding: 5px 0 5px 14px; margin-left: -2px;
  color: var(--text-2); text-decoration: none; border-left: 2px solid transparent;
  line-height: 1.4; transition: all 0.15s ease;
}
.toc li a:hover { color: var(--rvap-blue); }
.toc li a.h3 { padding-left: 26px; font-size: 12.5px; color: var(--text-2b); }
.toc li a.active { color: var(--rvap-blue); border-left-color: var(--rvap-blue); font-weight: 600; }

/* Article card */
.doc-main { padding: 30px 0 60px; min-width: 0; }
.breadcrumb {
  font-family: var(--ff-mono); font-size: 12px; letter-spacing: 0.02em;
  color: var(--text-2b); margin-bottom: 18px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
}
.breadcrumb a { color: var(--text-2b); text-decoration: none; }
.breadcrumb a:hover { color: var(--rvap-blue); }
.breadcrumb .sep { color: var(--text-3); }

.meta-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--ff-mono); font-size: 11.5px; letter-spacing: 0.02em;
  padding: 5px 11px; border-radius: 999px; border: 1px solid var(--border-md);
  background: var(--surface); color: var(--text-2);
}
.chip .k { color: var(--text-2b); }
.chip.cat-challenges { border-color: rgba(26,119,227,0.35); background: var(--challenges-dim); color: var(--rvap-blue); }
.chip.cat-resources  { border-color: rgba(0,120,212,0.35);  background: var(--resources-dim);  color: var(--ms-blue); }
.chip.cat-docs       { border-color: rgba(20,134,138,0.35); background: var(--docs-dim);       color: var(--teal); }
.chip.cat-coach      { border-color: rgba(80,64,146,0.35);  background: var(--coach-dim);      color: var(--purple); }

.article {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 46px 54px;
  box-shadow: var(--shadow-card);
}

/* ── Prose typography ── */
.prose { color: var(--text-2); font-size: 15.5px; line-height: 1.72; }
.prose > *:first-child { margin-top: 0; }
.prose h1, .prose h2, .prose h3, .prose h4 { font-family: var(--ff-display); color: var(--text); line-height: 1.2; letter-spacing: -0.01em; }
.prose h1 { font-size: 34px; font-weight: 800; margin: 0 0 20px; letter-spacing: -0.02em; }
.prose h2 { font-size: 24px; font-weight: 700; margin: 40px 0 14px; padding-top: 8px; border-top: 1px solid var(--border); }
.prose h2:first-of-type { border-top: none; padding-top: 0; }
.prose h3 { font-size: 18.5px; font-weight: 700; margin: 28px 0 10px; }
.prose h4 { font-size: 15.5px; font-weight: 700; margin: 22px 0 8px; color: var(--text-2); }
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 24px; }
.prose li { margin: 6px 0; }
.prose li::marker { color: var(--rvap-blue); }
.prose a { color: var(--rvap-blue); text-decoration: none; border-bottom: 1px solid rgba(26,119,227,0.3); transition: all 0.15s ease; }
.prose a:hover { color: var(--ms-blue); border-bottom-color: var(--ms-blue); }
.prose strong { color: var(--text); font-weight: 600; }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 34px 0; }
.prose img { max-width: 100%; border-radius: 10px; border: 1px solid var(--border); }

/* Heading anchors */
.prose .anchor { opacity: 0; margin-left: 8px; color: var(--text-3); text-decoration: none; border: none; font-weight: 400; }
.prose h2:hover .anchor, .prose h3:hover .anchor { opacity: 1; }

/* Blockquotes / callouts */
.prose blockquote {
  margin: 0 0 18px; padding: 14px 20px;
  background: var(--surface-3);
  border-left: 3px solid var(--rvap-blue);
  border-radius: 0 10px 10px 0;
  color: var(--text-2);
}
.prose blockquote p { margin: 0 0 8px; }
.prose blockquote p:last-child { margin-bottom: 0; }
.prose blockquote strong { color: var(--deep-navy); }

/* Tables */
.prose .table-wrap { overflow-x: auto; margin: 0 0 20px; border: 1px solid var(--border); border-radius: 12px; }
.prose table { border-collapse: collapse; width: 100%; font-size: 14px; }
.prose thead th {
  background: var(--deep-navy); color: #fff; text-align: left; font-weight: 600;
  font-family: var(--ff-body); padding: 11px 16px; white-space: nowrap;
}
.prose tbody td { padding: 10px 16px; border-top: 1px solid var(--border); vertical-align: top; }
.prose tbody tr:nth-child(even) { background: var(--surface-2); }

/* Inline code + code blocks */
.prose :not(pre) > code {
  font-family: var(--ff-mono); font-size: 0.86em;
  background: var(--challenges-dim); color: var(--ms-blue);
  padding: 2px 6px; border-radius: 6px; border: 1px solid rgba(26,119,227,0.16);
}
.prose pre {
  position: relative;
  background: #0B1F3A;
  border: 1px solid #123059;
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 0 0 20px;
  box-shadow: 0 6px 18px rgba(3,34,84,0.12);
}
.prose pre code {
  font-family: var(--ff-mono); font-size: 13px; line-height: 1.6;
  background: none; color: #E6EDF7; padding: 0; border: none; display: block;
}
.code-copy {
  position: absolute; top: 8px; right: 8px;
  font-family: var(--ff-mono); font-size: 11px;
  background: rgba(255,255,255,0.08); color: #C7D6EC;
  border: 1px solid rgba(255,255,255,0.16); border-radius: 6px;
  padding: 4px 9px; cursor: pointer; opacity: 0; transition: opacity 0.15s ease;
}
.prose pre:hover .code-copy { opacity: 1; }
.code-copy:hover { background: rgba(255,255,255,0.16); color: #fff; }

/* Task lists */
.prose ul.contains-task-list { list-style: none; padding-left: 4px; }
.prose li.task-list-item { display: flex; align-items: flex-start; gap: 9px; }
.prose li.task-list-item input[type=checkbox] { margin-top: 5px; accent-color: var(--rvap-blue); width: 15px; height: 15px; }

/* <details> */
.prose details {
  border: 1px solid var(--border-md); border-radius: 10px;
  padding: 4px 18px; margin: 0 0 16px; background: var(--surface-2);
}
.prose details[open] { padding-bottom: 12px; }
.prose summary {
  cursor: pointer; font-weight: 600; color: var(--deep-navy);
  padding: 12px 0; list-style: none; display: flex; align-items: center; gap: 8px;
}
.prose summary::-webkit-details-marker { display: none; }
.prose summary::before { content: '▸'; color: var(--rvap-blue); transition: transform 0.15s ease; }
.prose details[open] summary::before { transform: rotate(90deg); }

/* Mermaid */
.prose .mermaid { text-align: center; margin: 0 0 22px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }

/* Prev / next pager */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 34px; }
.pager a {
  display: block; padding: 16px 20px; border: 1px solid var(--border);
  border-radius: 12px; background: var(--surface); text-decoration: none;
  transition: all 0.18s ease; box-shadow: var(--shadow-card);
}
.pager a:hover { border-color: var(--rvap-blue); transform: translateY(-2px); }
.pager .dir { font-family: var(--ff-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-2b); }
.pager .ttl { font-family: var(--ff-display); font-weight: 700; color: var(--deep-navy); margin-top: 4px; }
.pager a.next { text-align: right; }
.pager a.disabled { visibility: hidden; }

/* Source bar (open on GitHub) */
.source-bar {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between;
  margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--border);
  font-size: 13px; color: var(--text-2b);
}
.source-bar a { color: var(--rvap-blue); text-decoration: none; }
.source-bar a:hover { color: var(--ms-blue); }

/* File tree (resource pages) */
.filetree { margin: 8px 0 20px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.filetree-head {
  background: var(--surface-3); padding: 10px 16px; font-family: var(--ff-mono);
  font-size: 12px; letter-spacing: 0.04em; color: var(--text-2b); border-bottom: 1px solid var(--border);
}
.filetree ul { list-style: none; padding: 6px 0; margin: 0; }
.filetree li { margin: 0; }
.filetree a, .filetree .dir {
  display: flex; align-items: center; gap: 9px; padding: 6px 16px;
  font-family: var(--ff-mono); font-size: 13px; text-decoration: none; color: var(--text-2); border: none;
}
.filetree a:hover { background: var(--challenges-dim); color: var(--rvap-blue); }
.filetree .ic { color: var(--text-3); width: 15px; text-align: center; }
.filetree .dir { color: var(--deep-navy); font-weight: 600; }

/* Footer is provided by shell.css. */

/* ── Responsive ── */
@media (max-width: 940px) {
  .doc-shell { grid-template-columns: minmax(0,1fr); gap: 0; }
  .toc { display: none; }
}
@media (max-width: 700px) {
  .container, .doc-shell, .footer-inner { padding-left: 20px; padding-right: 20px; }
  .article { padding: 28px 22px; border-radius: 12px; }
  .prose h1 { font-size: 27px; }
  .pager { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  
}

/* ════════════════════════════════════════ PRINT ════════════════════════════════════════ */
@media print {
  body::before, .orb, .nav, .footer, .toc, .source-bar, .code-copy, .no-print { display: none !important; }
  .doc-shell { display: block; max-width: none; padding: 0; }
  .article { border: none; box-shadow: none; padding: 0; }
  .prose pre { background: #f4f6fb; border: 1px solid #ccc; }
  .prose pre code { color: #111; }
  a { color: #000; }
}