:root {
  --navy: #001e62;
  --navy-soft: #5f739b;
  --stone: #ebe8e5;
  --stone-line: #d7d2cb;
  --ink: #1d1d1f;
  --muted: #6e6259;
  --bg: #ffffff;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Montserrat", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
}

a { color: var(--navy); text-underline-offset: 3px; }
a:hover { color: var(--navy-soft); }

.wrap { max-width: 920px; margin: 0 auto; padding: 0 24px; }

/* Header */
.masthead { background: var(--navy); color: #fff; }
.masthead .wrap {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: 8px 32px; padding-top: 22px; padding-bottom: 22px;
}
.masthead .name {
  font-family: var(--serif); font-weight: 600; font-size: 1.6rem; letter-spacing: 0.01em;
  color: #fff; text-decoration: none;
}
.masthead nav { display: flex; flex-wrap: wrap; gap: 4px 26px; }
.masthead nav a {
  color: #fff; text-decoration: none; font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase; padding-bottom: 3px;
  border-bottom: 2px solid transparent;
}
.masthead nav a:hover { color: #fff; border-bottom-color: #fff; }

/* Intro */
.intro { background: var(--stone); }
.intro .wrap {
  display: grid; grid-template-columns: 280px 1fr; gap: 48px; align-items: start;
  padding-top: 52px; padding-bottom: 52px;
}
.intro img { width: 100%; height: auto; display: block; }
.role {
  margin: 0 0 4px; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--navy);
}
.intro h1 {
  margin: 0 0 18px; font-family: var(--serif); font-weight: 600; font-size: 2.6rem;
  line-height: 1.1; color: var(--navy);
}
.intro p { margin: 0 0 14px; }
.links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.links a {
  display: inline-block; padding: 7px 16px; border: 1.5px solid var(--navy);
  font-size: 0.8rem; font-weight: 600; text-decoration: none; letter-spacing: 0.03em;
}
.links a.primary { background: var(--navy); color: #fff; }
.links a:hover { background: var(--navy); color: #fff; }

/* Sections */
section.block { padding: 56px 0 8px; }
section.block h2 {
  font-family: var(--serif); font-weight: 600; font-size: 1.9rem; color: var(--navy);
  margin: 0 0 24px; padding-bottom: 10px; border-bottom: 1px solid var(--stone-line);
}

/* Papers */
.papers { list-style: none; margin: 0; padding: 0; }
.paper { padding: 20px 0; border-bottom: 1px solid var(--stone); }
.paper:last-child { border-bottom: 0; }
.paper h3 {
  margin: 0 0 4px; font-family: var(--serif); font-weight: 600; font-size: 1.22rem; line-height: 1.35;
}
.paper h3 a { text-decoration: none; }
.paper h3 a:hover { text-decoration: underline; }
.authors { margin: 0; color: var(--muted); font-size: 0.92rem; }
.status { margin: 4px 0 0; font-size: 0.92rem; }
.authors a { color: inherit; text-decoration-color: var(--stone-line); }
.authors a:hover { color: var(--navy); }
.status em { font-style: italic; }
.tag {
  display: inline-block; margin-right: 8px; padding: 1px 8px; font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase; vertical-align: 1px;
  background: var(--navy); color: #fff;
}
.tag.wp { background: transparent; color: var(--navy); border: 1px solid var(--navy); }
.paper details { margin-top: 8px; }
.paper summary {
  display: inline-block; cursor: pointer; font-size: 0.8rem; font-weight: 600; color: var(--navy);
  letter-spacing: 0.03em; list-style: none;
}
.paper summary::-webkit-details-marker { display: none; }
.paper summary::before { content: "+ "; }
.paper details[open] summary::before { content: "\2212  "; }
.paper .extra { font-size: 0.85rem; }
.paper .sep { margin: 0 8px; color: var(--muted); }
.paper details p { margin: 10px 0 0; font-size: 0.93rem; max-width: 72ch; }


.courses { list-style: none; margin: 0; padding: 0; }
.course { padding: 14px 0; border-bottom: 1px solid var(--stone); }
.course:last-child { border-bottom: 0; }
.course h3 { margin: 0 0 4px; font-family: var(--serif); font-weight: 600; font-size: 1.22rem; color: var(--navy); }
.empty { color: var(--muted); margin: 0; }

/* Footer */
footer { margin-top: 64px; background: var(--navy); color: #fff; font-size: 0.85rem; }
footer .wrap { padding-top: 28px; padding-bottom: 28px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
footer a { color: #fff; }

@media (max-width: 720px) {
  .wrap { padding: 0 16px; }
  .intro .wrap { grid-template-columns: 1fr; gap: 24px; padding-top: 32px; padding-bottom: 36px; }
  .intro img { max-width: 260px; }
  .intro h1 { font-size: 2.1rem; }
  section.block { padding-top: 40px; }
}