:root {
  color-scheme: light;
  --ink: #182536;
  --muted: #536274;
  --line: #d8e0e7;
  --paper: #ffffff;
  --canvas: #f5f7f8;
  --accent: #165d70;
  --accent-dark: #0d4050;
  --focus: #aa6b12;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.62;
}
a { color: var(--accent-dark); text-underline-offset: .18em; }
a:hover { color: #07303f; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.skip-link {
  position: absolute;
  top: -5rem;
  left: 1rem;
  z-index: 100;
  padding: .55rem .8rem;
  background: var(--paper);
}
.skip-link:focus { top: 1rem; }
.masthead {
  background: #102b3a;
  color: #fff;
  border-bottom: 4px solid #8ba4a5;
}
.masthead-inner, main, .site-footer-inner { width: min(100% - 2.5rem, 960px); margin-inline: auto; }
.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
}
.brand { color: #fff; text-decoration: none; font-weight: 700; letter-spacing: .04em; }
.brand small { display: block; color: #d1dfe4; font-weight: 400; letter-spacing: 0; }
nav { display: flex; flex-wrap: wrap; gap: .4rem 1.1rem; }
nav a { color: #edf5f7; font-size: .95rem; }
main { padding-block: clamp(1.6rem, 4vw, 3.7rem) 4rem; }
.eyebrow { margin: 0 0 .8rem; color: var(--accent-dark); font-size: .8rem; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.22; letter-spacing: -.025em; }
h1 { max-width: 29ch; margin: 0 0 1rem; font-size: clamp(2rem, 4vw, 3.35rem); }
article .hero h1 { max-width: 40ch; font-size: clamp(1.75rem, 3.6vw, 2.75rem); }
h2 { margin: 0 0 1rem; font-size: clamp(1.3rem, 2.6vw, 1.7rem); }
h3 { margin: 0 0 .55rem; font-size: 1.12rem; }
.dek { max-width: 70ch; margin: 0 0 1.4rem; color: var(--muted); font-size: clamp(1.06rem, 1.8vw, 1.22rem); }
.hero, .section, .paper-card { background: var(--paper); border: 1px solid var(--line); }
.hero { padding: clamp(1.35rem, 4vw, 3rem); border-top: 4px solid var(--accent); }
.section { padding: clamp(1.25rem, 3vw, 2.3rem); margin-top: 1rem; }
.paper-list { display: grid; gap: 1rem; margin-top: 1rem; }
.paper-card { padding: 1.3rem; border-left: 4px solid var(--accent); }
.paper-card h2 { font-size: 1.28rem; max-width: 52ch; }
.paper-card p { margin: .45rem 0 0; color: var(--muted); }
.paper-card .links { margin-top: .85rem; }
.paper-card .links a { margin-right: 1.2rem; }
.byline { margin: 0 0 .15rem; font-size: 1.12rem; font-weight: 700; }
.meta-line { margin: .2rem 0; color: var(--muted); }
.metadata { display: flex; flex-wrap: wrap; gap: .55rem; margin: 1.3rem 0 0; padding: 0; list-style: none; }
.metadata li { padding: .28rem .65rem; background: #eaf0f2; border-radius: 2px; font-size: .88rem; }
.actions { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.6rem 0 0; }
.button { display: inline-block; padding: .7rem 1rem; background: var(--accent); color: #fff; font-weight: 700; text-decoration: none; }
.button:hover { background: var(--accent-dark); color: #fff; }
.button.secondary { background: #edf2f3; color: var(--accent-dark); }
.button.secondary:hover { background: #dbe7e9; }
.abstract { max-width: 80ch; }
.abstract p { margin: 0 0 1rem; overflow-wrap: anywhere; }
.keywords { color: var(--muted); }
.facts { display: grid; grid-template-columns: minmax(8rem, 13rem) minmax(0, 1fr); margin: 0; }
.facts dt, .facts dd { margin: 0; padding: .55rem 0; border-top: 1px solid var(--line); overflow-wrap: anywhere; }
.facts dt { color: var(--muted); font-weight: 650; }
.notice { margin-top: 1rem; padding: .9rem 1rem; border-left: 3px solid #8d9fa6; background: #f0f3f4; color: #384855; }
.site-footer { border-top: 1px solid var(--line); background: #edf1f3; }
.site-footer-inner { padding-block: 1.4rem; color: var(--muted); font-size: .9rem; }
@media (max-width: 620px) {
  .masthead-inner { display: block; }
  nav { margin-top: .8rem; }
  .facts { display: block; }
  .facts dd { border-top: 0; padding-top: 0; }
  .facts dt { border-top: 1px solid var(--line); padding-bottom: 0; }
  .actions { display: grid; }
  .button { text-align: center; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }