:root {
  color-scheme: light;
  --ink: #32383d;
  --muted: #626e75;
  --line: #dfe4e6;
  --link: #397d96;
  --link-hover: #235a71;
  --soft: #edf3f5;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1.65;
}

a { color: var(--link); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--link-hover); }
a:focus-visible { outline: 2px solid var(--link); outline-offset: 3px; }

.skip-link {
  position: absolute;
  top: -60px;
  left: 12px;
  z-index: 10;
  padding: 8px 12px;
  background: #fff;
}
.skip-link:focus { top: 8px; }

.site-header { border-bottom: 1px solid var(--line); }
.header-inner {
  max-width: 1200px;
  min-height: 62px;
  margin: 0 auto;
  padding: 0 30px;
  display: flex;
  align-items: center;
  gap: 54px;
}
.wordmark { color: var(--ink); font-size: 16px; font-weight: 700; text-decoration: none; white-space: nowrap; }
.site-header nav { display: flex; gap: 28px; }
.site-header nav a { color: var(--ink); font-size: 14px; text-decoration: none; }
.site-header nav a:hover { color: var(--link); }

.page-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 42px 30px 72px;
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 56px;
}

.profile { align-self: start; position: sticky; top: 24px; }
.profile-mark {
  width: 150px;
  height: 150px;
  display: grid;
  place-items: center;
  margin-bottom: 15px;
  border-radius: 5px;
  background: var(--soft);
  color: var(--link-hover);
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -0.06em;
}
.profile h1 { margin: 0 0 5px; font-size: 19px; line-height: 1.3; }
.profile-role, .profile-areas { margin: 0 0 15px; font-size: 13px; line-height: 1.5; }
.profile-areas { color: var(--muted); }
.profile-links { margin: 14px 0 0; padding: 14px 0 0; border-top: 1px solid var(--line); list-style: none; }
.profile-links li { margin: 0 0 8px; font-size: 13px; }
.profile-links a { text-decoration: none; }
.profile-links a:hover { text-decoration: underline; }

.main-content { min-width: 0; max-width: 790px; }
.main-content h2 { margin: 0 0 17px; font-size: 26px; line-height: 1.3; }
.introduction { padding: 1px 0 29px; }
.introduction p { max-width: 740px; margin: 0; font-size: 16px; line-height: 1.75; }

.research { padding-top: 23px; border-top: 1px solid var(--line); }
.date-note { max-width: 730px; margin: -8px 0 22px; color: var(--muted); font-size: 12px; }
.topic-group { margin-top: 25px; }
.topic-group h3 { margin: 0 0 11px; font-size: 18px; line-height: 1.35; }
.paper-list { margin: 0; padding-left: 21px; }
.paper { padding: 0 0 12px 3px; }
.paper::marker { color: var(--muted); font-size: 12px; }
.paper h4 { display: inline; margin: 0; font-size: 16px; font-weight: 600; line-height: 1.5; }
.paper h4 a { text-decoration: none; }
.paper h4 a:hover { text-decoration: underline; }
.paper-meta { display: inline; margin: 0 0 0 7px; color: var(--muted); font-size: 12px; white-space: nowrap; }
.paper-summary { margin: 7px 0 6px; font-size: 14px; }
.paper-links { display: flex; flex-wrap: wrap; align-items: baseline; gap: 5px 18px; margin: 0; font-size: 12px; }
.paper-links span { color: var(--muted); }
.paper-links span a { color: var(--link); }

.site-footer {
  max-width: 1200px;
  min-height: 64px;
  margin: 0 auto;
  padding: 17px 30px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 760px) {
  .header-inner { min-height: 56px; padding: 0 20px; gap: 24px; }
  .site-header nav { gap: 16px; }
  .page-shell { padding: 28px 20px 54px; grid-template-columns: 1fr; gap: 30px; }
  .profile { position: static; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
  .profile-mark { width: 90px; height: 90px; margin-bottom: 11px; font-size: 29px; }
  .profile-role, .profile-areas { margin-bottom: 9px; }
  .profile-links { display: flex; flex-wrap: wrap; gap: 5px 18px; margin-top: 12px; padding-top: 12px; }
  .profile-links li { margin: 0; }
  .introduction { padding-bottom: 25px; }
  .paper-meta { display: block; margin: 2px 0 0; }
  .site-footer { padding-right: 20px; padding-left: 20px; }
}