/* TOC controls */
.toc-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.ctrl-btn {
  appearance: none;
  border: 1px solid rgba(0,0,0,0.12);
  background: transparent;
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
}
.ctrl-btn:hover { background: rgba(0,0,0,0.06); }
body.theme-dark .ctrl-btn { border-color: rgba(255,255,255,0.16); }
.toc-controls #theme-toggle[aria-pressed="true"] { font-weight: 600; }
/* Icon-only theme toggle */
#theme-toggle.ctrl-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}
:root {
  --bg: #ffffff;
  --text: #222;
  --muted: #556;
  --link: #0066cc;
  --link-hover: #004499;
  --heading: #00324d;
  --header-bg: linear-gradient(135deg, #006995 0%, #004466 100%);
  --header-text: #ffffff;
  --toc-bg: #e9edf1;
  --toc-handle: #e9edf1;
  --overlay: rgba(0,0,0,0.25);
  --border: rgba(0,0,0,0.12);
  --surface: #f8f9fa; /* Subtle grey for light mode content box */
}
body.theme-dark {
  --bg: #101317;
  --text: #e6e9ed;
  --muted: #9aa4af;
  --link: #4dabf7;
  --link-hover: #74c0fc;
  --heading: #cfe8ff;
  --header-bg: linear-gradient(135deg, #0f2940 0%, #0b1e2f 100%);
  --header-text: #e6e9ed;
  --toc-bg: #1a1f26;
  --toc-handle: #1a1f26; /* Match sidebar background */
  --overlay: rgba(0,0,0,0.45);
  --border: rgba(255,255,255,0.14);
  --surface: #0f141a;
}
/* Base typography */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
}
/* Force theme background and text globally */
html {
  min-height: 100vh; /* Ensure html fills the viewport */
}
html, body {
  background: var(--bg) !important;
  color: var(--text) !important;
}
/* Keep main surface transparent; other elements get themed backgrounds */
main { background: transparent; }
header {
  background: transparent;
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
  text-align: center !important; /* Force center alignment */
}
header h1 {
  color: var(--heading);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 15px; /* Space between title and button */
}

/* Style the theme toggle in its new home */
#theme-toggle.ctrl-btn {
  background: transparent;
  border: 1px solid transparent;
  font-size: 1.5rem; /* Make icon bigger */
  padding: 0.25em;
  margin: 0;
  width: auto;
  height: auto;
  line-height: 1;
  border-radius: 50%; /* Make it circular */
}

#theme-toggle.ctrl-btn:hover {
  background: var(--surface);
  border-color: var(--border);
}
header p { color: var(--muted); font-size: 1rem; margin: 4px 0 0; }
main {
  flex-grow: 1; /* Allow main to grow and fill available space */
  max-width: 900px;
  width: 100%;
  margin: 20px auto; /* Re-introduce vertical margin for spacing */
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-sizing: border-box; /* Ensure padding is included in width/height */
}

.mission-image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 5px 15px var(--border);
  margin: 15px 0;
}
h1, h2, h3 { color: var(--heading); }
a, a:visited { color: var(--link); text-decoration: none; }
a:hover { opacity: 0.9; }
a:hover {
  text-decoration: underline;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: var(--surface);
  color: var(--text);
}
table, th, td {
  border: 1px solid var(--border);
}
th, td {
  padding: 10px;
  text-align: left;
}
th {
  background: var(--toc-bg);
  color: var(--text);
}
/* Mission table styling */
#mission .mission-table tr.selected td { background: var(--toc-bg); }
#mission .mission-table tr:hover td { background: var(--border); opacity: 0.5; }
#mission .mission-table td { vertical-align: top; }
#mission [id^="mission-table-container"] { overflow-x: auto; }

/* Hide advanced columns by default */
#mission table.hide-advanced th:nth-child(11),
#mission table.hide-advanced td:nth-child(11),
#mission table.hide-advanced th:nth-child(12),
#mission table.hide-advanced td:nth-child(12),
#mission table.hide-advanced th:nth-child(13),
#mission table.hide-advanced td:nth-child(13),
#mission table.hide-advanced th:nth-child(14),
#mission table.hide-advanced td:nth-child(14) {
  display: none;
}

/* Active state for Advanced toggle */
#mission-advanced-toggle.active { background: #0b8457; border-color: #0b8457; color: #fff; }
/* Zebra striping for readability in daily table */
#daily table tr:nth-child(odd) td { background: var(--surface); }
#daily table tr:nth-child(even) td { background: var(--toc-bg); }
#daily table tr:hover td { background: var(--border); opacity: 0.5; }
/* Zebra striping for configuration table */
#config table tr:nth-child(odd) td { background: var(--surface); }
#config table tr:nth-child(even) td { background: var(--toc-bg); }
#config table tr:hover td { background: var(--border); opacity: 0.5; }
/* Zebra striping for coordinates table (Recce section) */
#recce table tr:nth-child(odd) td { background: var(--surface); }
#recce table tr:nth-child(even) td { background: var(--toc-bg); }
#recce table tr:hover td { background: var(--border); opacity: 0.5; }
/* Zebra striping for mission tables */
#mission .mission-table tr:nth-child(odd) td { background: var(--surface); }
#mission .mission-table tr:nth-child(even) td { background: var(--toc-bg); }
#mission .mission-table tr:hover td { background: var(--border); opacity: 0.5; }
ul {
  margin-left: 20px;
}
.issue {
  background: var(--toc-bg);
  border-left: 4px solid #cc0000;
  padding: 8px;
  margin: 8px 0;
  color: var(--text);
}
.suggestion {
  background: var(--toc-bg);
  border-left: 4px solid var(--link);
  padding: 8px;
  margin: 8px 0;
  color: var(--text);
}
img {
  max-width: 100%;
  margin: 15px 0;
  border: 1px solid var(--border);
}

/* ================
   Left TOC sidebar
   ================ */
.toc-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh; /* match page height */
  width: 260px;
  overflow: hidden; /* hide inner slide */
  padding: 72px 14px 16px; /* leave space for header at top */
  background: var(--toc-bg);
  border-right: 1px solid rgba(0,0,0,0.06);
  box-shadow: none;
  z-index: 1000;
}
.toc-sidebar .toc-inner { position: relative; transition: transform 0.2s ease; }
.toc-sidebar h2 {
  margin-top: 0;
  font-size: 1rem;
  color: #004466;
}
.toc-sidebar a { color: #345; }
.toc-sidebar a:hover { color: #0066cc; }

/* Slim handle to toggle (sits at the right edge of sidebar) */
.toc-sidebar .toc-handle {
  position: absolute; /* anchor to sidebar edge */
  top: 50%;
  right: 0; /* flush to edge */
  transform: translate(0, -50%);
  width: 18px;
  height: 44px;
  border: none;
  border-radius: 0;
  background: var(--toc-handle);
  color: var(--text);
  box-shadow: none;
  cursor: pointer;
  z-index: 1100;
}
.toc-sidebar .toc-handle::before {
  content: '<';
  display: block;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 14px;
  line-height: 44px;
  text-align: center;
}

/* No content push; sidebar overlays content */

/* Collapsed state: keep a slim handle only; inner slides out */
body.toc-collapsed .toc-sidebar { width: 18px; padding-right: 0; }
body.toc-collapsed .toc-sidebar .toc-inner { transform: translateX(-280px); }
body.toc-collapsed .toc-sidebar .links-tree { pointer-events: none; }
/* Keep handle at the edge of the slim bar */
body.toc-collapsed .toc-sidebar .toc-handle { right: 0; }
/* Update handle icon when collapsed */
body.toc-collapsed .toc-sidebar .toc-handle::before { content: '>'; }

/* Ensure the first (TOC) section styling is consistent with sidebar theme */
main > .toc-sidebar { background: var(--toc-bg); }

/* Responsive behavior */
@media (max-width: 900px) {
  .toc-sidebar { width: 240px; }
}
@media (max-width: 700px) {
  /* Default to collapsed on small screens; JS also enforces */
  body main { margin-left: 0; }
}

/* Overlay for TOC */
#toc-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 900; /* below sidebar (1000) and handle (1100) */
}
body:not(.toc-collapsed) #toc-overlay {
  opacity: 1;
  pointer-events: auto;
}

/* Tables and generic surfaces */
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  color: var(--text);
}
th, td {
  border: 1px solid var(--border);
  padding: 8px 10px;
}
th { font-weight: 600; }

hr { border: none; border-top: 1px solid var(--border); }
.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  margin: 20px 0;
}
.nav a {
  background: var(--link);
  color: var(--surface);
  padding: 8px 16px;
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.9rem;
}
.nav a:hover { color: var(--link-hover); }

.nav.toc {
  display: block;
  margin: 20px 0;
}
.nav.toc h2 {
  margin: 0 0 8px 0;
  font-size: 1.1rem;
  color: var(--heading);
}
.nav.toc ol {
  margin: 0;
  padding-left: 20px;
}
.nav.toc a {
  background: transparent;
  color: #0066cc;
  padding: 0;
  border-radius: 0;
  font-size: 0.95rem;
}
.nav.toc a:hover {
  background: transparent;
  text-decoration: underline;
}
.nav.toc .links-tree ul {
  list-style: none;
  padding-left: 20px;
  margin: 6px 0;
}
.nav.toc .links-tree > ul { padding-left: 0; }
.nav.toc .links-tree li { margin: 4px 0; }
.nav.toc .links-tree ul { position: relative; }
.nav.toc .links-tree li { position: relative; padding-left: 14px; }
.nav.toc .links-tree li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0;
  height: 100%;
  border-left: 1px solid #cfd8dc;
}
.nav.toc .links-tree li::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.9em;
  width: 10px;
  border-top: 1px solid #cfd8dc;
}
.nav.toc .links-tree li:last-child::before { height: 0.9em; }
/* Folder-style links */
.links-tree ul {
  list-style: none;
  padding-left: 20px;
  margin: 6px 0;
}
.links-tree > ul { padding-left: 0; }
.links-tree li { margin: 4px 0; }
.links-tree ul { position: relative; }
.links-tree li { position: relative; padding-left: 14px; }
.links-tree li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0;
  height: 100%;
  border-left: 1px solid #cfd8dc;
}
.links-tree li::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.9em;
  width: 10px;
  border-top: 1px solid #cfd8dc;
}
.links-tree li:last-child::before { height: 0.9em; }
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 20px 0;
}
.link-card {
  background: var(--toc-bg);
  padding: 15px;
  border-radius: 5px;
  border-left: 4px solid var(--link);
  color: var(--text);
}
.link-card h4 {
  color: var(--heading);
  margin-bottom: 10px;
}
.problem-statement {
  background: var(--toc-bg);
  padding: 20px;
  border-radius: 5px;
  margin: 20px 0;
  border-left: 4px solid var(--link);
  color: var(--text);
}
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 0.8rem;
  margin-left: 10px;
  background: var(--toc-bg);
  border: 1px solid var(--border);
  color: var(--text);
}
.tag-documentation { 
  background-color: var(--toc-bg); 
  color: var(--link); 
  border: 1px solid var(--border);
}
.tag-hardware { 
  background-color: var(--toc-bg); 
  color: #f57c00; 
  border: 1px solid var(--border);
}
.tag-software { 
  background-color: var(--toc-bg); 
  color: #2e7d32; 
  border: 1px solid var(--border);
}
.tag-operational { 
  background-color: var(--toc-bg); 
  color: #c2185b; 
  border: 1px solid var(--border);
}
.tag-safety { 
  background-color: var(--toc-bg); 
  color: #d32f2f; 
  border: 1px solid var(--border);
}
.tag-testing { 
  background-color: var(--toc-bg); 
  color: #6a1b9a; 
  border: 1px solid var(--border);
}
.tag-customer { 
  background-color: var(--toc-bg); 
  color: #00838f; 
  border: 1px solid var(--border);
}
.tag-firmware { 
  background-color: var(--toc-bg); 
  color: #8e24aa;
  border: 1px solid var(--border);
}
.tag-sensor { 
  background-color: var(--toc-bg); 
  color: #00695c;
  border: 1px solid var(--border);
}
.tag-resources { 
  background-color: var(--toc-bg); 
  color: var(--muted);
  border: 1px solid var(--border);
}
.tag-planning { 
  background-color: var(--toc-bg); 
  color: #ef6c00;
  border: 1px solid var(--border);
}
.tag-procedure { 
  background-color: var(--toc-bg); 
  color: #0277bd;
  border: 1px solid var(--border);
}
/* Tag Filter chips */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 6px; }
.filter-btn {
  padding: 4px 10px; border: 1px solid var(--border); border-radius: 16px; background: var(--toc-bg); color: var(--text); font-size: 0.85rem; cursor: pointer;
}
.filter-btn:hover { background: var(--border); opacity: 0.7; }
.filter-btn.active { background: var(--link); color: var(--surface); border-color: var(--link); }
/* Collapsible headings */
.collapsible-heading { cursor: pointer; user-select: none; display: flex; align-items: center; gap: 8px; }
.collapsible-heading:focus { outline: 2px solid #80bfff; outline-offset: 2px; }
.collapsible-toggle { display: inline-block; width: 1em; transition: transform 0.2s ease; color: var(--heading); }
.collapsible-heading[aria-expanded="false"] .collapsible-toggle { transform: rotate(-90deg); }
.is-hidden { display: none !important; }
.coordinates {
  font-family: monospace;
  background: var(--toc-bg);
  padding: 2px 4px;
  border-radius: 3px;
  color: var(--text);
}