/* ============================================================
   RHDP LiteMaaS — Shared Documentation Stylesheet
   Applies global UX improvements across all pages.
   Does not conflict with existing page-specific inline styles.
   ============================================================ */

/* ---- Google Fonts (Red Hat Text) ---- */
@import url('https://fonts.googleapis.com/css2?family=Red+Hat+Text:wght@400;500;600;700&family=Red+Hat+Mono:wght@400;500&display=swap');

/* ---- Base / Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Red Hat Text', 'Segoe UI', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  background: #f5f5f5;
  color: #151515;
}

/* ---- Sticky Navigation ---- */
nav {
  position: sticky !important;
  top: 0;
  z-index: 200;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

/* ---- Typography improvements ---- */
p { font-size: 1rem; line-height: 1.7; }

.section p, .card p, .issue p {
  font-size: 1rem;
  line-height: 1.7;
  color: #333;
}

/* ---- Heading anchor links ---- */
.section h2,
.section h3,
.card h2,
.card h3,
.issue-title {
  position: relative;
}

.anchor-link {
  display: inline-block;
  opacity: 0;
  margin-left: 0.4rem;
  color: #cc0000;
  text-decoration: none;
  font-size: 0.85em;
  font-weight: 400;
  transition: opacity 0.15s;
  vertical-align: middle;
}

h2:hover .anchor-link,
h3:hover .anchor-link {
  opacity: 1;
}

/* ---- Code block improvements ---- */
pre {
  position: relative;
  background: #1a1a2e !important;
  color: #e0e0e0 !important;
  border-radius: 8px !important;
  padding: 1.2rem 1.5rem !important;
  overflow-x: auto;
  font-family: 'Red Hat Mono', 'Courier New', monospace;
  font-size: 0.84rem !important;
  line-height: 1.6;
  border: 1px solid #2d2d50;
}

/* Copy button on code blocks */
.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: #2d2d50;
  color: #ccc;
  border: 1px solid #404070;
  border-radius: 4px;
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
  font-family: 'Red Hat Text', sans-serif;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  z-index: 10;
}
.copy-btn:hover { background: #cc0000; color: white; border-color: #cc0000; }
.copy-btn.copied { background: #3e8635; color: white; border-color: #3e8635; }

/* ---- Table improvements ---- */
tr:nth-child(even) td { background: #f9f9f9; }
tr:hover td { background: #fef5f5 !important; }

/* ---- Back to Top button ---- */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #cc0000;
  color: white;
  border: none;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.2s;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  line-height: 1;
}
#back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}
#back-to-top:hover { transform: translateY(-2px); background: #a50000; }

/* ---- Footer timestamp ---- */
.footer-updated {
  display: block;
  font-size: 0.78rem;
  color: #888;
  margin-top: 0.3rem;
}

/* ---- Active nav highlight ---- */
nav a.active {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

/* ---- Architecture sidebar (Jump to section) ---- */
.arch-layout {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.arch-sidebar {
  display: none;
  width: 200px;
  flex-shrink: 0;
  position: sticky;
  top: 60px;
  background: white;
  border-radius: 8px;
  padding: 1.2rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  font-size: 0.84rem;
}

.arch-sidebar h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #cc0000;
  margin-bottom: 0.8rem;
}

.arch-sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.arch-sidebar li {
  margin-bottom: 0.5rem;
}

.arch-sidebar a {
  color: #444;
  text-decoration: none;
  display: block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: background 0.15s, color 0.15s;
  line-height: 1.3;
}

.arch-sidebar a:hover {
  background: #fef0f0;
  color: #cc0000;
}

.arch-sidebar a.sidebar-active {
  background: #cc0000;
  color: white;
}

.arch-content {
  flex: 1;
  min-width: 0;
}

@media (min-width: 900px) {
  .arch-sidebar { display: block; }
}

/* ---- Index page search bar ---- */
.search-wrap {
  margin: 0 0 1.5rem;
}

#doc-search {
  width: 100%;
  padding: 0.75rem 1.2rem;
  font-size: 1rem;
  font-family: 'Red Hat Text', sans-serif;
  border: 2px solid #ddd;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s;
  background: white;
  color: #151515;
}

#doc-search:focus { border-color: #cc0000; }
#doc-search::placeholder { color: #999; }

.search-no-results {
  display: none;
  color: #666;
  font-size: 0.9rem;
  padding: 0.5rem 0;
}

/* ---- Hamburger / Mobile nav ---- */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: #e0e0e0;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.85rem 1.2rem;
  line-height: 1;
}

/* Desktop: nav-links are always visible in a row */
.nav-links {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  flex: 1;
}

@media (max-width: 700px) {
  nav {
    flex-wrap: wrap;
    padding: 0 !important;
  }

  .nav-hamburger {
    display: block;
    width: 100%;
    text-align: left;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
  }

  .nav-links.open {
    display: flex;
  }

  nav a,
  .nav-group > a {
    padding: 0.75rem 1.2rem !important;
    border-top: 1px solid #2a2a2a;
  }

  .nav-dropdown {
    position: static !important;
    display: none;
    background: #111 !important;
    box-shadow: none !important;
    min-width: unset !important;
  }

  .nav-group:hover .nav-dropdown,
  .nav-group.open .nav-dropdown {
    display: block;
  }

  .nav-group > a::after {
    float: right;
  }

  .container {
    padding: 0 1rem !important;
  }

  header {
    padding: 1.2rem 1.5rem !important;
  }

  h1.page-title { font-size: 1.4rem; }
}

/* ---- Prev / Next page navigation ---- */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 1rem;
  margin: 2rem 0 1rem;
}

.page-nav a {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.4rem;
  background: white;
  border-radius: 8px;
  text-decoration: none;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  color: #151515;
  transition: box-shadow 0.2s, border-color 0.2s;
  border: 2px solid transparent;
  min-width: 180px;
  max-width: 48%;
}

.page-nav a:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  border-color: #cc0000;
}

.page-nav .pn-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #cc0000;
  margin-bottom: 0.3rem;
}

.page-nav .pn-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: #151515;
}

.page-nav .pn-next { margin-left: auto; text-align: right; }
.page-nav .pn-prev { margin-right: auto; text-align: left; }

/* ---- Card hover (only on clickable index cards, not content cards) ---- */
a.card {
  transition: box-shadow 0.2s, transform 0.2s;
}

a.card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  transform: translateY(-2px);
}

/* All Mermaid diagrams — click to expand */
.mermaid {
  cursor: zoom-in !important;
  position: relative;
  overflow-x: auto;
}

.mermaid:hover::after {
  content: "🔍 Click to expand";
  position: absolute;
  top: 0.4rem;
  right: 0.6rem;
  background: rgba(0,0,0,0.55);
  color: white;
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  pointer-events: none;
  z-index: 10;
}

/* Shared diagram modal */
.diagram-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 1000;
  overflow: auto;
  padding: 2rem;
  cursor: zoom-out;
}

.diagram-modal.open {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.diagram-modal-inner {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  max-width: 95vw;
  width: 100%;
}

.diagram-modal-close {
  position: fixed;
  top: 1rem;
  right: 1.5rem;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.5rem;
  z-index: 1001;
}

/* ---- Breadcrumbs ---- */
.breadcrumb {
  font-size: 0.84rem;
  color: #666;
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: #cc0000;
  text-decoration: none;
}

.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: #999; margin: 0 0.3rem; }