/* ============================================
   STARFLEET TACTICAL COMMAND — TOS INTERFACE
   Constitution-Class Commander Training System
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Pathway+Gothic+One&family=Titillium+Web:wght@300;400;600;700&display=swap');

:root {
  /* TOS Color Palette */
  --bg-primary: #0a0a0f;
  --bg-secondary: #0f1018;
  --bg-panel: #141420;
  --bg-panel-hover: #1a1a2e;
  --bg-table-header: #1a1a2e;
  --bg-table-row: #0f1018;
  --bg-table-row-alt: #121220;
  --bg-code: #111122;
  --bg-blockquote: #0d0d1a;
  --bg-speculation: #0d1117;

  /* Text Colors */
  --text-primary: #c8c8d0;
  --text-secondary: #8888a0;
  --text-dim: #606078;
  --text-bright: #e8e8f0;

  /* TOS Accent Colors */
  --command-gold: #d4a843;
  --command-gold-dim: #8a7030;
  --command-gold-bright: #f0c850;
  --science-blue: #4a9edb;
  --science-blue-dim: #2a5a80;
  --science-blue-bright: #70c0f0;
  --engineering-red: #d45050;
  --engineering-red-dim: #802020;
  --engineering-red-bright: #f07070;
  --alert-amber: #e8a020;
  --alert-amber-dim: #806010;
  --starfleet-teal: #40b0a0;
  --starfleet-teal-dim: #206860;
  --nav-purple: #9070c0;
  --nav-purple-dim: #504080;

  /* Borders */
  --border-color: #2a2a40;
  --border-accent: #3a3a58;

  /* Sizing */
  --sidebar-width: 320px;
  --content-max-width: 900px;
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Titillium Web', 'Segoe UI', sans-serif;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- Top Header Bar --- */
.header-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--command-gold-dim);
  display: flex;
  align-items: center;
  padding: 0 20px;
  z-index: 1000;
  gap: 16px;
}

.header-insignia {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-insignia svg {
  width: 32px;
  height: 32px;
}

.header-title {
  font-family: 'Pathway Gothic One', sans-serif;
  font-size: 1.3rem;
  color: var(--command-gold);
  text-transform: uppercase;
  letter-spacing: 3px;
  white-space: nowrap;
}

.header-subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-left: auto;
  white-space: nowrap;
}

.header-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--command-gold-dim);
  color: var(--command-gold);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-family: 'Titillium Web', sans-serif;
  font-size: 0.85rem;
}

.header-menu-btn:hover {
  background: var(--command-gold-dim);
  color: var(--bg-primary);
}

/* --- Layout --- */
.layout {
  display: flex;
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* --- Sidebar --- */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: var(--header-height);
  bottom: 0;
  left: 0;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 900;
  padding: 12px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border-accent) var(--bg-secondary);
}

.sidebar::-webkit-scrollbar {
  width: 6px;
}
.sidebar::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
.sidebar::-webkit-scrollbar-thumb {
  background: var(--border-accent);
  border-radius: 3px;
}

/* Nav section for each part */
.nav-part {
  margin-bottom: 2px;
}

.nav-part-header {
  display: flex;
  align-items: center;
  padding: 8px 14px;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.nav-part-header:hover {
  background: var(--bg-panel-hover);
}

.nav-part-header.active {
  background: var(--bg-panel);
}

.nav-part-number {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 3px;
  min-width: 28px;
  text-align: center;
  color: var(--bg-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.nav-part-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-bright);
  line-height: 1.3;
}

.nav-part-toggle {
  margin-left: auto;
  font-size: 0.65rem;
  color: var(--text-dim);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.nav-part.expanded .nav-part-toggle {
  transform: rotate(90deg);
}

/* Color coding per part category */
.nav-part[data-category="ship"] .nav-part-number { background: var(--science-blue); }
.nav-part[data-category="crew"] .nav-part-number { background: var(--command-gold); }
.nav-part[data-category="enemy"] .nav-part-number { background: var(--engineering-red); }
.nav-part[data-category="systems"] .nav-part-number { background: var(--starfleet-teal); }
.nav-part[data-category="tactics"] .nav-part-number { background: var(--alert-amber); }
.nav-part[data-category="endurance"] .nav-part-number { background: var(--engineering-red); }
.nav-part[data-category="special"] .nav-part-number { background: var(--nav-purple); }

/* Subsection links */
.nav-sections {
  display: none;
  padding: 2px 0 6px 0;
}

.nav-part.expanded .nav-sections {
  display: block;
}

.nav-section-link {
  display: block;
  padding: 4px 14px 4px 52px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s;
  line-height: 1.4;
}

.nav-section-link:hover {
  color: var(--text-bright);
  background: var(--bg-panel-hover);
}

.nav-section-link.active {
  color: var(--command-gold);
  border-left: 2px solid var(--command-gold);
  padding-left: 50px;
}

/* --- Main Content --- */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
}

.content-wrapper {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 40px 48px 120px;
}

/* --- Index Page (Landing) --- */
.index-hero {
  text-align: center;
  padding: 60px 20px 40px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 48px;
}

.index-hero .insignia-large svg {
  width: 80px;
  height: 80px;
  margin-bottom: 20px;
}

.index-hero h1 {
  font-family: 'Pathway Gothic One', sans-serif;
  font-size: 2.4rem;
  color: var(--command-gold);
  text-transform: uppercase;
  letter-spacing: 6px;
  margin-bottom: 8px;
}

.index-hero .classification {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.8rem;
  color: var(--engineering-red);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.index-hero .subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

.index-toc {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  max-width: 700px;
  margin: 0 auto;
}

.index-toc-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s;
}

.index-toc-item:hover {
  background: var(--bg-panel-hover);
  border-color: var(--command-gold-dim);
  transform: translateX(4px);
}

.index-toc-number {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 4px;
  color: var(--bg-primary);
  font-weight: 700;
  min-width: 32px;
  text-align: center;
  flex-shrink: 0;
}

.index-toc-text {
  flex: 1;
}

.index-toc-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-bright);
}

.index-toc-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* Color coding for TOC items */
.index-toc-item[data-category="ship"] .index-toc-number { background: var(--science-blue); }
.index-toc-item[data-category="crew"] .index-toc-number { background: var(--command-gold); }
.index-toc-item[data-category="enemy"] .index-toc-number { background: var(--engineering-red); }
.index-toc-item[data-category="systems"] .index-toc-number { background: var(--starfleet-teal); }
.index-toc-item[data-category="tactics"] .index-toc-number { background: var(--alert-amber); }
.index-toc-item[data-category="endurance"] .index-toc-number { background: var(--engineering-red); }
.index-toc-item[data-category="special"] .index-toc-number { background: var(--nav-purple); }

/* --- Part Pages — Content Styling --- */

/* Part header */
.part-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.part-header .part-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 6px;
}

.part-header h1 {
  font-family: 'Pathway Gothic One', sans-serif;
  font-size: 2rem;
  color: var(--command-gold);
  text-transform: uppercase;
  letter-spacing: 3px;
  line-height: 1.2;
  margin-bottom: 10px;
}

.part-header .classification-line {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  color: var(--engineering-red-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  line-height: 1.6;
}

/* Section headings */
h2 {
  font-family: 'Pathway Gothic One', sans-serif;
  font-size: 1.5rem;
  color: var(--command-gold);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-top: 56px;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--command-gold-dim);
  scroll-margin-top: calc(var(--header-height) + 20px);
}

h3 {
  font-size: 1.1rem;
  color: var(--science-blue-bright);
  font-weight: 600;
  margin-top: 36px;
  margin-bottom: 12px;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

h4 {
  font-size: 0.95rem;
  color: var(--starfleet-teal);
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 10px;
}

/* Paragraphs */
p {
  margin-bottom: 16px;
}

/* Strong and emphasis */
strong {
  color: var(--text-bright);
  font-weight: 600;
}

em {
  color: var(--text-secondary);
  font-style: italic;
}

/* --- Tables --- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 28px;
  font-size: 0.88rem;
}

thead th {
  background: var(--bg-table-header);
  color: var(--command-gold);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 2px solid var(--command-gold-dim);
  font-weight: 400;
}

tbody tr {
  border-bottom: 1px solid var(--border-color);
}

tbody tr:nth-child(even) {
  background: var(--bg-table-row-alt);
}

tbody td {
  padding: 9px 14px;
  vertical-align: top;
}

tbody td:first-child {
  color: var(--text-bright);
  font-weight: 600;
}

/* --- Speculation / Inference Blocks --- */
.speculation {
  background: var(--bg-speculation);
  border-left: 3px solid var(--science-blue-dim);
  padding: 14px 18px;
  margin: 20px 0;
  border-radius: 0 4px 4px 0;
  font-size: 0.9rem;
}

.speculation .spec-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  color: var(--science-blue);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 6px;
}

.speculation p {
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 0;
}

/* --- Blockquotes / Dialogue --- */
blockquote {
  background: var(--bg-blockquote);
  border-left: 3px solid var(--command-gold-dim);
  padding: 14px 18px;
  margin: 16px 0;
  border-radius: 0 4px 4px 0;
}

blockquote p {
  color: var(--text-secondary);
  margin-bottom: 8px;
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* --- Code / Computer Readout --- */
code {
  font-family: 'Share Tech Mono', monospace;
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.88em;
  color: var(--starfleet-teal);
}

pre {
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 16px 20px;
  overflow-x: auto;
  margin: 16px 0;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.82rem;
  color: var(--starfleet-teal);
  line-height: 1.5;
}

/* --- Lists --- */
ul, ol {
  margin: 12px 0 16px 24px;
}

li {
  margin-bottom: 6px;
}

li::marker {
  color: var(--command-gold-dim);
}

/* Nested lists */
li ul, li ol {
  margin-top: 6px;
  margin-bottom: 4px;
}

/* --- Horizontal Rules (section dividers) --- */
hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 40px 0;
}

/* --- Commander's Summary Blocks --- */
.commanders-summary {
  background: var(--bg-panel);
  border: 1px solid var(--command-gold-dim);
  border-radius: 6px;
  padding: 24px 28px;
  margin: 40px 0;
}

.commanders-summary h2 {
  color: var(--command-gold-bright);
  margin-top: 0;
  border-bottom-color: var(--command-gold);
}

/* --- Navigation Footer --- */
.part-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  gap: 16px;
}

.part-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--command-gold);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.part-nav a:hover {
  background: var(--bg-panel-hover);
  border-color: var(--command-gold-dim);
}

.part-nav .nav-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.part-nav .nav-title {
  font-weight: 600;
}

/* Footer stamp */
.footer-stamp {
  text-align: center;
  margin-top: 48px;
  padding: 20px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* --- Search Box --- */
.search-box {
  padding: 8px 14px;
  margin-bottom: 8px;
}

.search-box input {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 7px 12px;
  color: var(--text-primary);
  font-family: 'Titillium Web', sans-serif;
  font-size: 0.82rem;
  outline: none;
}

.search-box input::placeholder {
  color: var(--text-dim);
}

.search-box input:focus {
  border-color: var(--command-gold-dim);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 280px;
  }
  .content-wrapper {
    padding: 32px 32px 100px;
  }
  .header-subtitle {
    display: none;
  }
}

@media (max-width: 768px) {
  .header-menu-btn {
    display: block;
  }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    width: 300px;
    min-width: 300px;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 899;
  }

  .sidebar-overlay.visible {
    display: block;
  }

  .main-content {
    margin-left: 0;
  }

  .content-wrapper {
    padding: 24px 20px 80px;
  }

  .index-hero h1 {
    font-size: 1.6rem;
    letter-spacing: 3px;
  }

  .part-header h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  table {
    font-size: 0.8rem;
  }

  thead th, tbody td {
    padding: 7px 10px;
  }

  .part-nav {
    flex-direction: column;
  }

  .part-nav a {
    width: 100%;
    justify-content: center;
  }
}

/* --- Utility --- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
}

/* Animated scanner line (subtle TOS touch) */
.scanner-line {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--command-gold-dim), transparent);
  opacity: 0.3;
  z-index: 9999;
  animation: scan 8s linear infinite;
  pointer-events: none;
}

@keyframes scan {
  0% { opacity: 0; }
  10% { opacity: 0.3; }
  90% { opacity: 0.3; }
  100% { opacity: 0; }
}

/* Print styles */
@media print {
  .header-bar, .sidebar, .sidebar-overlay, .scanner-line, .part-nav, .header-menu-btn {
    display: none !important;
  }
  .main-content {
    margin-left: 0 !important;
  }
  .content-wrapper {
    max-width: 100%;
    padding: 20px;
  }
  body {
    background: white;
    color: black;
  }
  h2, h3, .part-header h1 {
    color: black;
  }
  table {
    border: 1px solid #ccc;
  }
  thead th {
    background: #eee;
    color: black;
  }
  tbody tr {
    border-bottom: 1px solid #ddd;
  }
}