/* Base reset & typography */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --navy: #1a3a5c;
  --navy-light: #2c5582;
  --accent: #c2410c;
  --text: #1f2937;
  --text-muted: #525a66;
  --bg: #faf9f6;
  --panel: #ffffff;
  --border: #d4dae3;
  --soft: #eef2f7;
}
html { font-size: 17px; -webkit-text-size-adjust: 100%; }
body {
  font-family: Georgia, "Iowan Old Style", "Times New Roman", serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  margin: 0;
}
h1, h2, h3, h4, nav, .meta, .pill, .references-title, .figure-caption, button, .button {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
h1 { font-size: 2.1rem; color: var(--navy); line-height: 1.2; margin-bottom: 0.4em; }
h2 { font-size: 1.4rem; color: var(--navy); margin: 2em 0 0.6em; padding-bottom: 0.3em; border-bottom: 1px solid var(--border); }
h3 { font-size: 1.1rem; color: var(--navy-light); margin: 1.4em 0 0.4em; }
p { margin: 0.6em 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.container { max-width: 880px; margin: 0 auto; padding: 0 1.5rem; }
header.site {
  background: var(--navy);
  color: white;
  padding: 1.2rem 0;
  margin-bottom: 2rem;
}
header.site .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
header.site .brand { color: white; font-weight: 600; font-size: 1.05rem; letter-spacing: 0.2px; }
header.site nav { display: flex; align-items: center; gap: 1.5rem; }
header.site nav > a, header.site nav .nav-trigger {
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
header.site nav > a:hover, header.site nav .nav-trigger:hover { color: white; }

/* Dropdown menu */
.nav-dropdown { position: relative; display: inline-block; }
.nav-dropdown .nav-trigger {
  user-select: none;
}
.nav-dropdown .nav-trigger::after {
  content: "▾";
  font-size: 0.7rem;
  margin-left: 0.2rem;
  position: relative;
  top: -1px;
}
.nav-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.4rem);
  right: 0;
  background: white;
  border: 1px solid var(--border);
  border-radius: 6px;
  min-width: 320px;
  box-shadow: 0 8px 24px rgba(15,23,42,0.16);
  z-index: 100;
  padding: 0.4rem 0;
  overflow: hidden;
}
.nav-dropdown:hover .nav-menu,
.nav-dropdown:focus-within .nav-menu { display: block; }
.nav-menu a {
  display: block;
  padding: 0.7rem 1rem;
  color: var(--text);
  border-bottom: 1px solid var(--soft);
  margin: 0;
  font-size: 0.92rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
.nav-menu a:last-child { border-bottom: none; }
.nav-menu a:hover { background: var(--soft); text-decoration: none; color: var(--navy); }
.nav-menu .menu-number {
  font-size: 0.72rem;
  letter-spacing: 0.4px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  display: block;
  margin-bottom: 2px;
}
.nav-menu .menu-title {
  display: block;
  color: var(--navy);
  font-weight: 600;
}

main { padding-bottom: 4rem; }

/* Pills (status, tags) */
.pill {
  display: inline-block;
  padding: 2px 10px;
  background: var(--soft);
  color: var(--navy);
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 12px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
.pill.proposal { background: #fff7ed; color: #9a3412; }
.pill.educational { background: #ecfdf5; color: #065f46; }

/* Meta line */
.meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}
.meta span + span::before { content: " · "; padding: 0 0.3em; color: var(--border); }

/* Cards / panels */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.2rem 1.4rem;
  margin: 1.5rem 0;
}
.panel.highlight { background: #fff8e8; border-color: #f0d28a; }
.panel.compliance { background: #eef6f0; border-color: #b6d8c0; }

/* Lists */
ul, ol { margin: 0.5em 0 1em 1.5em; }
li { margin: 0.3em 0; }

/* Figure */
.figure {
  margin: 2rem 0;
  text-align: center;
}
.figure svg { max-width: 100%; height: auto; display: block; margin: 0 auto; }
.figure-caption {
  margin-top: 0.7em;
  color: var(--text-muted);
  font-size: 0.88rem;
  text-align: left;
}
.figure-caption strong { color: var(--text); }

/* Studies grid (landing page) */
.studies-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  margin: 2rem 0;
}
@media (min-width: 720px) {
  .studies-grid { grid-template-columns: 1fr 1fr 1fr; }
}
.study-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.2rem;
  color: var(--text);
}
.study-card:hover {
  border-color: var(--navy-light);
  text-decoration: none;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}
.study-card h3 { color: var(--navy); margin: 0.5em 0 0.3em; }
.study-card p { color: var(--text-muted); font-size: 0.92rem; }
.study-card .number {
  font-family: -apple-system, sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.4px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
}

/* References */
.references-title {
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 2.5rem;
  margin-bottom: 0.7rem;
}
.references {
  font-size: 0.9rem;
  color: var(--text-muted);
}
.references li { margin: 0.4em 0; }

/* Footer */
footer.site {
  margin-top: 5rem;
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border);
  background: #f3f4f7;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
@media (min-width: 720px) {
  .footer-grid { grid-template-columns: 2fr 1.4fr 1fr 2fr; }
}
.footer-section h4 {
  font-size: 0.78rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--navy);
  margin: 0 0 0.8rem;
  font-weight: 700;
}
.footer-section p { margin: 0.4em 0; line-height: 1.55; font-size: 0.85rem; }
.footer-section ul.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin: 0.4em 0; }
.footer-links a { color: var(--text-muted); font-size: 0.85rem; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}
.footer-disclaimer {
  font-size: 0.78rem;
  line-height: 1.5;
  color: #6b7280;
  margin-bottom: 1.2rem;
  background: #fafbfc;
  border-left: 3px solid var(--border);
  padding: 0.8rem 1rem;
  border-radius: 0 4px 4px 0;
}
.footer-disclaimer strong { color: var(--navy); }
.footer-meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.76rem;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}
.footer-meta .meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.footer-meta .meta-divider {
  color: var(--border);
}

/* Code-ish */
code, .mono {
  font-family: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
  background: var(--soft);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.92em;
}