/* ---- tokens ---- */
:root {
  --ink: #1a1a1a;
  --muted: #5c5c5c;
  --ground: #ffffff;
  --link: #14425f;
  --rule: #dcdcdc;

  --serif: Charter, "Bitstream Charter", "Iowan Old Style", "Sitka Text",
    Georgia, serif;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;

  --measure: 34rem;
  --gap: 2.25rem;
}

/* ---- base ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 17px;
}

body {
  max-width: 37rem;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 5rem;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main,
.masthead,
.footer {
  max-width: var(--measure);
  margin-left: auto;
  margin-right: auto;
}

p {
  margin: 0 0 1.1rem;
}

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid rgba(20, 66, 95, 0.3);
}

a:hover {
  border-bottom-color: var(--link);
}

a:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: var(--gap) auto;
  max-width: var(--measure);
}

/* ---- navbar (Quarto emits .navbar) ---- */
.navbar {
  max-width: var(--measure);
  margin: 0 auto 3rem;
  padding: 0 0 0.6rem;
  border-bottom: 1px solid var(--rule);
  display: flex;
  gap: 1.25rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.navbar .navbar-brand,
.navbar .navbar-title {
  display: none;
}

.navbar a {
  border-bottom: 0;
  color: var(--muted);
}

.navbar a:hover {
  color: var(--ink);
}

.navbar-nav {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar .navbar-nav:last-child {
  margin-left: auto;
}

/* ---- masthead ---- */
.masthead {
  display: flex;
  align-items: flex-start;
  gap: 1.75rem;
  margin-bottom: var(--gap);
}

.portrait {
  width: 150px;
  height: auto;
  flex: 0 0 150px;
  border-radius: 2px;
}

.identity p {
  margin: 0 0 0.55rem;
  color: var(--muted);
  line-height: 1.45;
}

.identity h1 {
  margin: 0 0 0.7rem;
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: var(--ink);
}

/* ---- headings ---- */
h2 {
  margin: 0 0 1.1rem;
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink);
}

h3 {
  margin: 1.5rem 0 0.7rem;
  font-size: 0.95rem;
  font-weight: 400;
  font-style: italic;
  color: var(--muted);
}

/* ---- paper lists ---- */
ul {
  padding-left: 1.1rem;
  margin: 0 0 1.1rem;
}

li {
  margin-bottom: 0.55rem;
}

.coauthors,
.status {
  display: block;
  font-size: 0.9rem;
  color: var(--muted);
}

.footer {
  margin-top: var(--gap);
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--muted);
}

/* ---- mobile ---- */
@media (max-width: 34rem) {
  html {
    font-size: 16px;
  }

  body {
    padding: 2rem 1.25rem 3rem;
  }

  .masthead {
    flex-direction: column;
    gap: 1.25rem;
  }

  .portrait {
    width: 120px;
    flex-basis: auto;
  }

  .navbar {
    flex-wrap: wrap;
    gap: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}