:root {
  --ink: #1d2733;
  --muted: #617084;
  --paper: #ffffff;
  --page: #e8eef5;
  --panel: #f3f7fb;
  --line: #cfd9e5;
  --header: #18365f;
  --header-deep: #0d2341;
  --nav: #21466f;
  --nav-light: #2b5b8d;
  --accent: #3aa6a0;
  --accent-dark: #277d79;
  --accent-soft: #dff3f1;
  --blue: #315f91;
  --max-width: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(255,255,255,.25), rgba(255,255,255,.25)),
    repeating-linear-gradient(135deg, #e4ebf2 0, #e4ebf2 2px, #edf2f7 2px, #edf2f7 6px);
  font-family: "Open Sans", Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

img { display: block; max-width: 100%; }

a { color: var(--blue); }

a:hover { color: var(--accent-dark); }

.site-shell {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  background: var(--paper);
  box-shadow: 0 0 28px rgba(7, 24, 45, .18);
}

/* Header now carries the preserved vintage aircraft image */
.site-header {
  position: relative;
  min-height: 310px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(9, 30, 57, .88) 0%, rgba(16, 52, 91, .62) 40%, rgba(16, 52, 91, .14) 74%),
    linear-gradient(180deg, rgba(24, 54, 95, .04), rgba(9, 28, 52, .18)),
    url("../img/chapter-aircraft.jpg") center 62% / cover no-repeat;
  border-bottom: 1px solid #07182b;
}

.site-header::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 92px;
  background: linear-gradient(transparent, rgba(6, 23, 43, .58));
  pointer-events: none;
}

.header-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 2.7rem 3rem 2.25rem;
}

.brand-kicker {
  margin: 0 0 .35rem;
  color: #cbdced;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.site-title {
  max-width: 720px;
  margin: 0;
  color: #fff;
  font-family: "Trebuchet MS", Arial, sans-serif;
  font-size: clamp(2.25rem, 5.3vw, 4.15rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.04em;
  text-shadow: 0 2px 4px rgba(0,0,0,.48);
}

.site-subtitle {
  max-width: 720px;
  margin: .75rem 0 0;
  color: #e3edf6;
  font-size: 1rem;
  text-shadow: 0 1px 2px rgba(0,0,0,.4);
}

/* Blue Zero Four-inspired navigation */
.primary-nav {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: stretch;
  min-height: 58px;
  padding: 0 2rem;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,.025) 0, rgba(255,255,255,.025) 2px, transparent 2px, transparent 6px),
    linear-gradient(#28527f, #1d4168);
  border-top: 1px solid rgba(255,255,255,.12);
  border-bottom: 4px solid var(--accent);
  box-shadow: inset 0 -1px 0 rgba(0,0,0,.4);
}

.nav-home {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding-right: 1.2rem;
  color: #fff;
  font-size: .92rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.nav-home:hover { color: #fff; }

.nav-home-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 30px;
  border-radius: 3px;
  background: var(--accent);
  color: #fff;
  font-size: .75rem;
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.18);
}

.nav-toggle {
  display: none;
  margin: .65rem 0 .65rem auto;
  border: 1px solid rgba(255,255,255,.38);
  border-radius: 3px;
  background: #17395f;
  color: #fff;
  padding: .45rem .7rem;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.nav-list {
  display: flex;
  align-items: stretch;
  flex: 1;
  justify-content: flex-end;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list li { display: flex; }

.nav-list a {
  display: flex;
  align-items: center;
  padding: 0 .78rem;
  color: #e2edf7;
  font-size: .84rem;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .025em;
  border-left: 1px solid rgba(255,255,255,.06);
}

.nav-list a:hover {
  color: #fff;
  background: rgba(255,255,255,.08);
}

.nav-list a[aria-current="page"] {
  color: #fff;
  background: rgba(255,255,255,.06);
  box-shadow: inset 0 -4px 0 var(--accent);
}

/* The separate banner has been removed */
.chapter-banner {
  display: none;
}

.page-main {
  padding: 2.8rem 3rem 3.4rem;
  background:
    linear-gradient(#fff, #f9fbfd);
}

.content-wrap { width: 100%; }

.page-heading {
  margin: 0 0 .65rem;
  color: var(--header-deep);
  font-family: "Trebuchet MS", Arial, sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1.12;
  letter-spacing: -.03em;
}

.page-heading::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin-top: .7rem;
  background: var(--accent);
}

.lead {
  max-width: 780px;
  margin: .8rem 0 2rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-card,
.content-card,
.notice-card,
.video-card,
.gallery-card {
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 1px 2px rgba(18, 58, 95, .05);
}

.hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(290px, .65fr);
  overflow: hidden;
}

.hero-card img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}

.hero-card-body {
  padding: 2rem;
  background:
    repeating-linear-gradient(135deg, rgba(28, 72, 112, .018) 0, rgba(28, 72, 112, .018) 2px, transparent 2px, transparent 6px),
    var(--panel);
  border-left: 1px solid var(--line);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  gap: 1.5rem;
  align-items: start;
}

.content-grid.single { grid-template-columns: 1fr; }

.content-card,
.notice-card {
  padding: 1.65rem;
}

.section-title {
  margin: 0 0 .65rem;
  color: var(--header-deep);
  font-family: "Trebuchet MS", Arial, sans-serif;
  font-size: 1.35rem;
}

.feature-image {
  width: 100%;
  border: 0;
  outline: 0;
  box-shadow: none;
}

.officer-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .65rem;
}

.officer {
  padding: .8rem;
  border-left: 4px solid var(--accent);
  background: #edf4fa;
}

.officer strong {
  display: block;
  color: var(--header-deep);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 43px;
  padding: .65rem 1rem;
  border: 0;
  border-radius: 3px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  text-transform: uppercase;
  font-size: .82rem;
  letter-spacing: .035em;
  box-shadow: inset 0 -3px 0 rgba(0,0,0,.14);
}

.button:hover {
  color: #fff;
  background: var(--accent-dark);
}

.button.secondary {
  background: var(--nav-light);
  color: #fff;
}

.button.secondary:hover {
  background: var(--header-deep);
}

.responsive-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: #fff;
}

.responsive-table {
  width: 100%;
  min-width: 650px;
  border-collapse: collapse;
}

.responsive-table th,
.responsive-table td {
  padding: .85rem .95rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.responsive-table th {
  color: #fff;
  background: var(--header);
  text-transform: uppercase;
  font-size: .82rem;
  letter-spacing: .04em;
}

.notice-card {
  margin-top: 1.5rem;
  border-top: 5px solid var(--accent);
  background: #f1f7fb;
}

.accordion {
  display: grid;
  gap: .65rem;
}

.accordion-item {
  border: 1px solid var(--line);
  background: #fff;
}

.accordion-button {
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: .9rem 1rem;
  border: 0;
  background: var(--header);
  color: #fff;
  font: inherit;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.accordion-item.open .accordion-button {
  background: var(--accent);
}

.accordion-panel {
  display: none;
  padding: 1rem;
}

.accordion-item.open .accordion-panel { display: block; }

.gallery-grid,
.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.video-card,
.gallery-card { overflow: hidden; }

.video-card-body,
.gallery-card-body {
  padding: 1.4rem;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: center;
  padding: 2rem 3rem;
  color: #cbd8e5;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,.02) 0, rgba(255,255,255,.02) 2px, transparent 2px, transparent 6px),
    var(--header-deep);
  border-top: 7px solid var(--accent);
  font-size: .88rem;
}

.site-footer .muted { color: #91a4b8; }

.social-link {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  color: #fff;
  font-weight: 800;
  text-decoration: none;
}

.social-link:hover { color: #8bd1cc; }

.social-link img {
  width: 32px;
  height: 32px;
}

.muted { color: var(--muted); }
.text-center { text-align: center; }

video {
  width: 100%;
  background: #000;
  border: 0;
}

@media (max-width: 960px) {
  .hero-card,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .hero-card-body {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .nav-list a {
    padding-inline: .55rem;
    font-size: .78rem;
  }
}

@media (max-width: 780px) {
  .site-shell { width: 100%; }

  .site-header {
    min-height: 285px;
    background-position: 60% 66%;
  }

  .header-inner {
    padding: 2.2rem 1.25rem 2rem;
  }

  .primary-nav {
    flex-wrap: wrap;
    padding-inline: 1rem;
  }

  .nav-toggle { display: inline-block; }

  .nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding-bottom: .6rem;
  }

  .primary-nav.open .nav-list { display: flex; }

  .nav-list li { display: block; }

  .nav-list a {
    display: block;
    padding: .72rem .75rem;
    border-top: 1px solid rgba(255,255,255,.08);
  }

  .page-main { padding: 2rem 1.25rem 2.5rem; }

  .officer-list,
  .gallery-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    grid-template-columns: 1fr;
    padding: 1.6rem 1.25rem;
  }
}

@media (max-width: 480px) {
  .site-title { font-size: 2.35rem; }

  .site-subtitle { font-size: .94rem; }

  .site-header {
    min-height: 270px;
  }
}


.content-image,
.hero-card img,
.feature-image,
.gallery-card img,
.video-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.compact-info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.compact-info {
  padding: 1.2rem;
  border-top: 4px solid var(--accent);
  background: var(--panel);
}

.compact-info h3 {
  margin: 0 0 .45rem;
  color: var(--header-deep);
  font-family: "Trebuchet MS", Arial, sans-serif;
  font-size: 1.15rem;
}

.home-actions {
  margin-top: 1.6rem;
  padding: 1.4rem;
  background: var(--header-deep);
  color: #e9f2fa;
}

.home-actions h3 {
  margin: 0 0 .4rem;
  color: #fff;
  font-family: "Trebuchet MS", Arial, sans-serif;
  font-size: 1.35rem;
}

.home-actions p {
  margin: 0;
}

@media (max-width: 780px) {
  .compact-info-grid {
    grid-template-columns: 1fr;
  }
}


.content-card p,
.hero-card-body p,
.notice-card p {
  max-width: 72ch;
}


.home-actions {
  border-top: 4px solid var(--accent);
  box-shadow: 0 1px 2px rgba(18, 58, 95, .05);
}

.hero-card-body,
.content-card,
.notice-card,
.compact-info {
  border-radius: 0;
}

.lead {
  max-width: 68ch;
}