/* ==========================================================
   FlyToSky — Aviation-chart inspired theme
   ========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&display=swap');

:root {
  --deep-navy: #0a1628;
  --mid-navy: #111d32;
  --panel: #152238;
  --panel-edge: #1e2f4a;
  --sky-blue: #4a90d9;
  --sky-light: #6aabef;
  --amber: #d4a574;
  --amber-dim: #b08a5e;
  --text-primary: #dfe4ed;
  --text-secondary: #8899aa;
  --text-faint: #556677;
}

/* ---- Reset & base ---- */
html {
  position: relative;
  min-height: 100%;
}

body {
  margin: 0;
  padding: 0;
  margin-bottom: 72px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--deep-navy);
  -webkit-font-smoothing: antialiased;
}

/* Subtle topo grid — CSS only, no images */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 0%, rgba(74,144,217,0.03) 50%, transparent 100%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 59px,
      rgba(74,144,217,0.04) 59px,
      rgba(74,144,217,0.04) 60px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 59px,
      rgba(74,144,217,0.04) 59px,
      rgba(74,144,217,0.04) 60px
    );
  pointer-events: none;
  z-index: 0;
}

/* ---- Navbar ---- */
.navbar-inverse {
  background: var(--mid-navy) !important;
  border: none !important;
  border-bottom: 1px solid var(--panel-edge) !important;
  box-shadow: 0 1px 12px rgba(0,0,0,0.35);
  min-height: 52px;
}

.navbar-inverse .navbar-brand {
  font-family: 'Instrument Serif', serif;
  font-size: 22px;
  letter-spacing: 0.02em;
  color: var(--amber) !important;
}

.navbar-inverse .navbar-nav > li > a {
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary) !important;
  transition: color 0.2s;
  padding-top: 16px;
  padding-bottom: 16px;
}

.navbar-inverse .navbar-nav > li > a:hover,
.navbar-inverse .navbar-nav > li > a:focus {
  color: var(--text-primary) !important;
}

.navbar-inverse .navbar-nav > .active > a,
.navbar-inverse .navbar-nav > .active > a:hover,
.navbar-inverse .navbar-nav > .active > a:focus {
  background: transparent !important;
  color: var(--amber) !important;
  box-shadow: inset 0 -2px 0 var(--amber);
}

.navbar-inverse .navbar-toggle {
  border-color: var(--panel-edge);
}
.navbar-inverse .navbar-toggle .icon-bar {
  background-color: var(--text-secondary);
}

/* ---- Main container ---- */
body > .container {
  padding: 74px 15px 0;
  position: relative;
  z-index: 1;
}

/* Remove default bootstrap page-header */
.page-header {
  border-bottom: 1px solid var(--panel-edge);
  margin-top: 10px;
  margin-bottom: 30px;
  padding-bottom: 14px;
}

.page-header h2 {
  font-family: 'Instrument Serif', serif;
  font-weight: 400;
  font-size: 30px;
  color: var(--text-primary);
  margin: 0;
}

.page-header h2 small {
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  display: block;
  margin-top: 4px;
}

/* ---- Typography inside content ---- */
h1, h2, h3, h4 {
  font-family: 'Instrument Serif', serif;
  font-weight: 400;
  color: var(--text-primary);
}

h2 {
  font-size: 34px;
  margin-top: 52px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--panel-edge);
}
h3 { font-size: 20px; color: var(--amber); }

p, li {
  color: var(--text-primary);
}

a {
  color: var(--sky-blue);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover, a:focus {
  color: var(--sky-light);
  text-decoration: none;
}

strong { color: var(--text-primary); font-weight: 600; }

code {
  font-size: 80%;
  background: var(--panel);
  color: var(--amber);
  border: 1px solid var(--panel-edge);
  border-radius: 3px;
  padding: 2px 5px;
}

/* ---- Home: Hero section ---- */
.hero-intro {
  display: flex;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 48px;
}

.hero-text {
  flex: 1;
  min-width: 0;
}

.hero-text .tagline {
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber-dim);
  margin-bottom: 10px;
}

.hero-text h1 {
  font-family: 'Instrument Serif', serif;
  font-size: 42px;
  line-height: 1.15;
  color: var(--text-primary);
  margin: 0 0 18px 0;
}

.hero-text h1 em {
  font-style: italic;
  color: var(--sky-blue);
}

.hero-text .summary {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 540px;
}

.hero-image {
  flex: 0 0 340px;
  max-width: 340px;
}

.hero-image img {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--panel-edge);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.hero-image .img-caption {
  font-size: 12px;
  color: var(--text-faint);
  text-align: center;
  margin-top: 8px;
}

/* ---- Reports grid ---- */
.reports-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 52px;
}

.report-link {
  display: inline-block;
  padding: 10px 22px;
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 4px;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: border-color 0.2s, color 0.2s, box-shadow 0.2s;
}

.report-link:hover {
  border-color: var(--sky-blue);
  color: var(--sky-light);
  box-shadow: 0 2px 12px rgba(74,144,217,0.12);
  text-decoration: none;
}

/* ---- Source link ---- */
.source-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-faint);
  margin-bottom: 36px;
  letter-spacing: 0.02em;
}

.source-link svg {
  width: 16px;
  height: 16px;
  fill: var(--text-faint);
  transition: fill 0.2s;
}

.source-link:hover {
  color: var(--text-secondary);
  text-decoration: none;
}
.source-link:hover svg {
  fill: var(--text-secondary);
}

/* ---- Section divider ---- */
.section-rule {
  border: none;
  border-top: 1px solid var(--panel-edge);
  margin: 0 0 40px 0;
}

.section-label {
  font-family: 'DM Sans', sans-serif;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 20px;
}

/* ---- Video embed ---- */
.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  margin-bottom: 40px;
}

.video-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 6px;
}

/* ---- Eval figures ---- */
.eval-figure {
  margin: 28px 0;
}

.eval-figure img {
  width: 60%;
  border-radius: 6px;
  border: 1px solid var(--panel-edge);
}

.eval-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-faint);
  text-align: center;
}

/* ---- Logging preview ---- */
.logging-preview {
  margin-bottom: 40px;
  text-align: center;
}

.logging-preview img {
  width: 80%;
  border-radius: 6px;
  border: 1px solid var(--panel-edge);
}

/* ---- Team grid ---- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.team-card {
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 6px;
  padding: 24px 20px;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.team-card:hover {
  border-color: rgba(74,144,217,0.3);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.team-card .name {
  font-family: 'Instrument Serif', serif;
  font-size: 19px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.team-card .netid {
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.team-card .linkedin-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--sky-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.team-card .linkedin-link:hover {
  color: var(--sky-light);
  text-decoration: none;
}

/* ---- Footer ---- */
.footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: auto;
  min-height: 56px;
  padding: 16px 0;
  background: var(--mid-navy);
  border-top: 1px solid var(--panel-edge);
}

.footer .text-muted {
  margin: 0;
  font-size: 13px;
  color: var(--text-faint);
}

.footer .text-muted a {
  color: var(--text-secondary);
}

/* ---- Content pages (proposal, status, etc.) ---- */
.container p,
.container li {
  line-height: 1.75;
}

.container ul, .container ol {
  padding-left: 20px;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .hero-intro {
    flex-direction: column;
    gap: 24px;
  }

  .hero-image {
    flex: none;
    max-width: 100%;
  }

  .hero-text h1 {
    font-size: 32px;
  }

  .team-grid {
    grid-template-columns: 1fr;
  }

  .reports-bar {
    flex-wrap: wrap;
  }
}