/* =========================================================
   Astronomical Society of Kansas City — Design System
   VERSION: 2026-06-14-v4  (nav overlay full-viewport fix)
   Palette grounded in the observing experience: deep night
   sky, amber/red observatory lighting, starlight text.
   ========================================================= */

:root {
  --bg:        #0c121f;   /* deep night sky */
  --bg-panel:  #141d2f;   /* panel / card surface */
  --bg-raised: #1b2740;   /* raised surface, nav */
  --line:      #2a3a59;   /* hairline borders */
  --text:      #e7ecf5;   /* starlight */
  --text-dim:  #9aabc9;   /* muted blue-grey */
  --accent:    #e8a23d;   /* amber — observatory red-light discipline, logo gold */
  --accent-2:  #6fb4c9;   /* cool nebula teal, secondary accent */
  --accent-soft: rgba(232, 162, 61, 0.12);

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Subtle starfield texture on the body background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.35) 0, transparent 40%),
    radial-gradient(1px 1px at 80% 10%, rgba(255,255,255,0.25) 0, transparent 40%),
    radial-gradient(1.5px 1.5px at 60% 70%, rgba(255,255,255,0.2) 0, transparent 40%),
    radial-gradient(1px 1px at 30% 80%, rgba(255,255,255,0.3) 0, transparent 40%),
    radial-gradient(1px 1px at 90% 60%, rgba(255,255,255,0.2) 0, transparent 40%),
    radial-gradient(1.5px 1.5px at 45% 35%, rgba(255,255,255,0.25) 0, transparent 40%);
  background-size: 100% 100%;
}

a {
  color: var(--accent-2);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 0.6em;
  color: var(--text);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.3rem; color: var(--accent); }

p { margin: 0 0 1em; color: var(--text); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- Header / Nav ---------- */

.site-header {
  background: var(--bg-raised);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  max-width: var(--container);
  margin: 0 auto;
  gap: 1rem;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  min-width: 0;
}

.brand img {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.1;
}

.brand-text span {
  display: block;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Hamburger toggle button (checkbox-driven, no JS) */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  flex-shrink: 0;
}

.nav-toggle-label .menu-icon,
.nav-toggle-label .menu-icon::before,
.nav-toggle-label .menu-icon::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  position: relative;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.nav-toggle-label .menu-icon::before,
.nav-toggle-label .menu-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-label .menu-icon::before { top: -7px; }
.nav-toggle-label .menu-icon::after { top: 7px; }

/* The collapsible nav content: links + social icons */
.nav-content {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex: 1 1 auto;
  justify-content: flex-end;
}

.main-nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.main-nav details {
  position: relative;
}

.main-nav summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.95rem;
  color: var(--text);
  padding: 0.4rem 0;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.main-nav summary::-webkit-details-marker { display: none; }

.main-nav summary::after {
  content: "▾";
  font-size: 0.7rem;
  color: var(--text-dim);
}

.main-nav > a {
  color: var(--text);
  font-size: 0.95rem;
  padding: 0.4rem 0;
}

.main-nav > a:hover, .main-nav summary:hover { color: var(--accent); text-decoration: none; }

.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.4rem 0;
  min-width: 200px;
  box-shadow: 0 12px 24px rgba(0,0,0,0.4);
  margin-top: 0.5rem;
}

.dropdown a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text);
  font-size: 0.92rem;
}

.dropdown a:hover {
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding-left: 0.85rem;
  border-left: 1px solid var(--line);
}

.social-links a {
  display: flex;
  color: var(--text-dim);
}

.social-links a:hover { color: var(--accent); }

.social-links svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* ---------- Mobile nav ---------- */

@media (max-width: 720px) {
  .nav-toggle-label {
    display: flex;
  }

  /* Collapsed by default: hide the nav content panel */
  .nav-content {
    display: none;
  }

  /* When the hidden checkbox is checked, show the panel as a full-screen overlay */
  .nav-toggle:checked ~ .nav-content {
    display: flex;
    position: fixed;
    inset: 0;
    z-index: 90;
    background: var(--bg-raised);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 6rem 1.5rem 1.5rem;
    overflow-y: auto;
    gap: 1.5rem;
  }

  .brand,
  .nav-toggle-label {
    position: relative;
    z-index: 110;
  }

  .nav-toggle:checked ~ .nav-toggle-label .menu-icon {
    background: transparent;
  }

  .nav-toggle:checked ~ .nav-toggle-label .menu-icon::before {
    top: 0;
    transform: rotate(45deg);
  }

  .nav-toggle:checked ~ .nav-toggle-label .menu-icon::after {
    top: 0;
    transform: rotate(-45deg);
  }

  .nav-toggle:checked ~ .nav-content .main-nav {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0.25rem;
  }

  .nav-toggle:checked ~ .nav-content .main-nav details {
    width: 100%;
  }

  .nav-toggle:checked ~ .nav-content .main-nav summary {
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 1.05rem;
  }

  .nav-toggle:checked ~ .nav-content .dropdown {
    position: static;
    border: none;
    box-shadow: none;
    background: transparent;
    padding: 0.25rem 0 0.5rem 1rem;
    margin: 0;
    min-width: 0;
  }

  .nav-toggle:checked ~ .nav-content .dropdown a {
    padding: 0.6rem 0;
    font-size: 1rem;
  }

  .nav-toggle:checked ~ .nav-content .social-links {
    border-left: none;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 1.25rem;
    justify-content: flex-start;
    gap: 1.5rem;
  }

  .nav-toggle:checked ~ .nav-content .social-links svg {
    width: 24px;
    height: 24px;
  }
}
/* ---------- Hero ---------- */

.hero {
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(12,18,31,0.55) 0%, rgba(12,18,31,0.92) 100%),
    url("../images/hero.jpg");
  background-size: cover;
  background-position: center;
}

.hero.hero-home {
  padding: 6rem 0 3.5rem;
  background:
    linear-gradient(180deg, rgba(12,18,31,0.35) 0%, rgba(12,18,31,0.95) 100%),
    url("../images/hero.jpg");
  background-size: cover;
  background-position: center;
}

.hero .eyebrow {
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 640px;
}

/* ---------- Sections / Cards ---------- */

.section {
  padding: 3rem 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.5rem 1.75rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.notice {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.notice strong { color: var(--accent); }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #1a1306;
  font-weight: 600;
  padding: 0.65rem 1.4rem;
  border-radius: 6px;
  text-decoration: none;
  border: none;
  font-size: 0.95rem;
}

.btn:hover {
  background: #f4b85c;
  text-decoration: none;
}

.btn-outline {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--accent-2);
  color: var(--accent-2);
  padding: 0.6rem 1.3rem;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.95rem;
}

/* ---------- Timeline (History page) ---------- */

.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid var(--line);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -2.45rem;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg), 0 0 0 5px var(--line);
}

.timeline-item h3 {
  margin-bottom: 0.4rem;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-raised);
  padding: 2.5rem 0 2rem;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-grid h4 {
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  font-family: var(--font-body);
}

.footer-grid a {
  display: block;
  color: var(--text-dim);
  font-size: 0.9rem;
  padding: 0.2rem 0;
}

.footer-grid a:hover { color: var(--accent); text-decoration: none; }

.footer-social {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.footer-social a {
  display: flex;
  color: var(--text-dim);
}

.footer-social a:hover { color: var(--accent); }

.footer-social svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ---------- Embedded widgets ---------- */

.embed-frame {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-panel);
  overflow: hidden;
}

.embed-frame iframe {
  display: block;
  width: 100%;
  border: 0;
}

@media (max-width: 720px) {
  .embed-frame {
    width: 100%;
    margin-left: 0;
    border-radius: 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .embed-frame iframe {
    width: 640px;
    max-width: none;
  }
}

/* Bulleted lists (default for content lists) */
ul.list-clean:not(.linklist) {
  list-style: disc;
  padding-left: 1.4rem;
  margin: 0 0 1em;
}
ul.list-clean:not(.linklist) li {
  padding: 0.2rem 0;
  color: var(--text);
}

/* Plain link lists (footer-style, no bullets, with dividers) */
.list-clean.linklist {
  list-style: none;
  padding: 0;
  margin: 0;
}
.list-clean.linklist li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--line);
}
.list-clean.linklist li:last-child { border-bottom: none; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
}

table th, table td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--line);
}

table th {
  color: var(--accent);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-left: 0.5rem;
  padding-left: 0.85rem;
  border-left: 1px solid var(--line);
}

.social-links a {
  display: flex;
  color: var(--text-dim);
}

.social-links a:hover { color: var(--accent); }

.social-links svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}


/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}