/* Jason M. Pittman -- site.css
   Minimal, editorial, ink-on-paper. Serif for display, sans for everything else. */

:root {
  --ink: #1a1a18;
  --ink-secondary: #6b6656;
  --ink-muted: #8c8670;
  --paper: #f6f1e6;
  --surface-tint: #faf6ec;
  --border: #ded7c4;
  --border-strong: #c9c1a8;
  --accent: #9a3324;
  --accent-soft: #c86a52;
  --serif: 'Newsreader', Georgia, serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --measure: 900px;
}

* { box-sizing: border-box; }

html { background: var(--paper); }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  margin: 0;
  line-height: 1.7;
  font-size: 16px;
}

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 20px;
}

.wrap-wide {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--ink); }
a.quiet { color: var(--ink-secondary); text-decoration: none; }

.link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
}
.link:hover { border-color: var(--ink); }

/* -- full-width bands (vertical-scroll homepage) -- */
.band { padding: 80px 24px; }
.band-inner { max-width: var(--measure); margin: 0 auto; }
.band-tint { background: var(--surface-tint); }
.band-hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: var(--measure);
  margin: 0 auto;
}
.band-quote { text-align: center; }
.band-quote p.jmp-quote {
  font-family: var(--serif);
  font-style: italic;
  font-size: 24px;
  line-height: 1.55;
  max-width: 560px;
  margin: 0 auto 20px;
  color: var(--ink);
}
.band-doors {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.band-photo {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: 30% 20%;
  border-radius: 8px;
  border: 1px solid var(--border);
}
@media (max-width: 760px) {
  .band { padding: 48px 20px; }
  .band-hero { grid-template-columns: 1fr; gap: 24px; }
  .band-photo { max-width: 220px; margin: 0 auto; }
  .band-doors { grid-template-columns: 1fr; }
}

/* -- nav (one nav, used on every page, full-width sticky bar) -- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 241, 230, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-nav .row {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 22px;
}
.site-nav .brand {
  font-family: var(--serif);
  font-size: 17px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.site-nav .links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13px;
}
.site-nav .links a {
  color: var(--ink-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.site-nav .links a.current,
.site-nav .links a:hover {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}
.site-nav .links a.cta {
  color: var(--ink);
}
.site-nav .links a.cta:hover,
.site-nav .links a.cta.current {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

/* the nav now sits outside .wrap / .wrap-wide as a full-width bar, so the
   content container carries the top gap that .site-nav used to own */
.wrap, .wrap-wide { padding-top: 48px; }
body { scroll-padding-top: 90px; }

/* -- dark observatory theme (homepage, Carrier Problem hub) -- */
body.theme-dark {
  --ink: #f2ede2;
  --ink-secondary: #a8a294;
  --ink-muted: #7d7869;
  --paper: #0e0d0b;
  --border: #26241f;
  --border-strong: #3a372f;
  --accent: #c9a24a;
  --accent-soft: #e0c07a;
}
body.theme-dark .site-nav {
  background: rgba(14, 13, 11, 0.85);
}
body.theme-dark .thesis {
  font-style: italic;
  font-weight: 400;
}

/* -- typography -- */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; color: var(--ink); }
h4 { font-size: 17px; margin: 0 0 10px; }
hr { border: none; border-top: 1px solid var(--border); margin: 22px 0; }
.thesis {
  font-family: var(--serif);
  font-style: italic;
  font-size: 31px;
  line-height: 1.38;
  margin: 0 0 24px;
  max-width: 620px;
  border-left: 3px solid var(--accent);
  padding-left: 22px;
}
.eyebrow {
  font-size: 11px;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 6px;
}
.lede {
  font-size: 15px;
  color: var(--ink-secondary);
  max-width: 480px;
}
p { margin: 0 0 1.1em; }

/* -- hero (two-column, text + ring illustration) -- */
.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: center;
  margin: 0 0 44px;
}
.hero .thesis { margin-bottom: 20px; }
.hero-photo {
  width: 100%;
  height: auto;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: 30% 20%;
  border-radius: 8px;
  border: 1px solid var(--border);
}
@media (max-width: 700px) {
  .hero { grid-template-columns: 1fr; gap: 24px; }
  .hero-photo { max-width: 240px; margin: 0 auto; }
}
.doors {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 14px;
  margin: 44px 0;
}
.door {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 26px 30px;
  text-decoration: none;
  display: block;
  transition: border-color .15s;
}
.door:hover { border-color: var(--accent); }
.door h3 { font-size: 19px; margin: 0 0 10px; }
.door p { font-size: 13.5px; line-height: 1.6; color: var(--ink-secondary); margin: 0; }

@media (max-width: 600px) {
  .doors { grid-template-columns: 1fr; }
  .thesis { font-size: 23px; }
}

/* -- sections (long-form pages) -- */
.section {
  padding: 36px 0;
  border-top: 1px solid var(--border);
}
.section:first-of-type { border-top: none; padding-top: 0; }
.section h2 { font-size: 20px; margin: 0 0 16px; }
.status-list { list-style: none; margin: 0; padding: 0; font-size: 14px; }
.status-list li {
  display: flex;
  justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  color: var(--ink-secondary);
}
.status-list li span.tag {
  font-size: 11px;
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* -- footer -- */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 56px;
  padding: 28px 0 48px;
  font-size: 12.5px;
  color: var(--ink-muted);
}
.site-footer .row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: baseline;
}
.site-footer a { color: var(--ink-muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.site-footer .secondary {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-size: 11px;
}

/* -- sticky header unit (main nav + optional sub-nav stack together) -- */
.sticky-header {
  position: sticky;
  top: 0;
  z-index: 50;
}
.sticky-header .site-nav {
  position: static;
}

/* -- horizontal tab nav (Research page sub-nav) -- */
.tab-nav {
  display: flex;
  justify-content: center;
  gap: 22px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--ink-secondary);
  background: rgba(246, 241, 230, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  margin: 0;
}

/* -- video embed (16:9), replaces the old Bootstrap .ratio.ratio-16x9 -- */
.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  margin: 16px 0;
}
.video-embed iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 0;
}
.tab-nav a { color: var(--ink-secondary); text-decoration: none; }
.tab-nav a:hover { color: var(--accent); }

/* -- page with side table-of-contents -- */
.page-toc {
  display: grid;
  grid-template-columns: 1fr 190px;
  gap: 56px;
  align-items: start;
}
.page-toc .toc {
  position: sticky;
  top: 96px;
  font-size: 12.5px;
}
.page-toc .toc a {
  display: block;
  color: var(--ink-muted);
  text-decoration: none;
  padding: 6px 0 6px 12px;
  border-left: 2px solid var(--border);
}
.page-toc .toc a:hover,
.page-toc .toc a.active {
  color: var(--accent);
  border-left-color: var(--accent);
}
@media (max-width: 860px) {
  .page-toc { grid-template-columns: 1fr; gap: 0; }
  .page-toc .toc { display: none; }
}

/* -- buttons (rare, used only for external purchase links) -- */
.btn-outline {
  display: inline-block;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 13px;
  color: var(--ink);
  text-decoration: none;
  background: transparent;
}
.btn-outline:hover { border-color: var(--ink); }

/* -- book list -- */
.book-entry { display: flex; gap: 20px; padding: 24px 0; border-top: 1px solid var(--border); }
.book-entry:first-child { border-top: none; padding-top: 0; }
.book-entry img { width: 110px; height: auto; border: 1px solid var(--border); flex-shrink: 0; }
.book-entry.featured img { width: 160px; }
.book-entry.featured h2 { font-size: 20px; }
.book-entry h2 { font-family: var(--serif); font-size: 16px; margin: 0 0 8px; font-weight: 500; }