/* Kengo Kato — a buildless, responsive academic website.
   Change the colors below to adjust the visual theme. */
:root {
  color-scheme: light;
  --paper: #fbfaf8;
  --surface: #ffffff;
  --ink: #292b2c;
  --muted: #626466;
  --accent: #a51b26;
  --accent-dark: #7f1420;
  --line: #dedbd5;
  --soft-line: #ece9e4;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 2rem; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
}
[hidden] { display: none !important; }
a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: .2em;
  overflow-wrap: anywhere;
}
a:hover { color: var(--accent-dark); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 5px;
}
button, input { font: inherit; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-weight: 400; }
h1, h2 { font-family: var(--serif); }
h1 { line-height: 1.14; letter-spacing: -.035em; }
h2 { font-size: 1.85rem; line-height: 1.3; letter-spacing: -.018em; }
h3 { font-size: 1rem; line-height: 1.5; font-weight: 600; }
p { margin-bottom: 1rem; }
li { padding-left: .25rem; }
main:focus { outline: none; }
.container { width: min(1080px, calc(100% - 80px)); margin-inline: auto; }
.skip-link {
  position: fixed;
  top: -6rem;
  left: 1rem;
  z-index: 10;
  padding: .6rem 1rem;
  color: var(--surface);
  background: var(--accent);
}
.skip-link:focus { top: 1rem; color: var(--surface); }
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 100px;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--line);
}
.site-name {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.35rem;
  text-decoration: none;
  white-space: nowrap;
}
.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem 1.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav li { padding: 0; }
.site-nav a {
  display: inline-block;
  padding-block: .4rem;
  color: var(--muted);
  font-size: .9rem;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover, .site-nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.eyebrow {
  margin-bottom: .9rem;
  color: var(--accent);
  font-size: .72rem;
  line-height: 1.4;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.profile {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 255px;
  align-items: start;
  gap: 4.5rem;
  padding-block: 4.5rem 3.5rem;
}
.profile h1 { margin-bottom: .55rem; font-size: clamp(2.8rem, 5.5vw, 4rem); }
.japanese-name { margin-bottom: 1.8rem; color: var(--muted); font-size: 1.25rem; letter-spacing: .08em; }
.position { margin-bottom: 1.4rem; }
.position p { margin-bottom: .1rem; }
.position .role { font-size: 1.15rem; margin-bottom: .25rem; }
.editorial { margin-bottom: .7rem; }
.contact { margin-bottom: 1.8rem; font-size: .95rem; }
.portrait { margin: .25rem 0 0; }
.portrait img {
  width: 100%;
  border: 8px solid var(--surface);
  box-shadow: 0 2px 16px rgb(41 43 44 / 8%);
}
.home-actions { display: flex; gap: .7rem; flex-wrap: wrap; }
.button {
  display: inline-block;
  padding: .6rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 3px;
  background: var(--accent);
  color: white;
  font-size: .9rem;
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
}
.button:hover { color: white; background: var(--accent-dark); border-color: var(--accent-dark); }
.button-secondary { color: var(--accent); background: transparent; border-color: var(--line); }
.button-secondary:hover { color: var(--accent-dark); background: #f2ede8; border-color: var(--accent); }
.home-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4.5rem;
  padding-block: 2.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.home-details h2 { margin-bottom: 1.1rem; font-size: 1.6rem; }
.research-areas, .profile-links { margin: 0; padding: 0; list-style: none; }
.research-areas li { padding: .2rem 0; font-family: var(--serif); font-size: 1.15rem; }
.profile-links li { padding: .2rem 0; }
.text-arrow { margin-left: .25rem; }
.genealogy { padding-block: 2.5rem 1rem; }
.genealogy h2 { margin-bottom: 1rem; font-size: 1.6rem; }
.genealogy p { color: var(--muted); font-size: .94rem; line-height: 2; }
.genealogy .person { white-space: nowrap; }
.genealogy .separator { padding-inline: .3rem; color: var(--accent); }
.page-heading { padding-block: 3.5rem 2rem; }
.page-heading h1 { margin-bottom: 1rem; font-size: clamp(2.6rem, 4.8vw, 3.5rem); }
.page-heading p:not(.eyebrow) { max-width: 780px; color: var(--muted); }
.content-layout { display: grid; grid-template-columns: 205px minmax(0, 1fr); gap: 3.2rem; }
.section-nav { align-self: start; position: sticky; top: 2rem; padding-top: .2rem; }
.section-nav h2 { margin-bottom: .85rem; color: var(--muted); font-family: var(--sans); font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; }
.section-nav ul { margin: 0 0 1.5rem; padding: 0; list-style: none; }
.section-nav li { padding: 0; }
.section-nav a { display: inline-block; padding-block: .3rem; font-size: .9rem; text-decoration: none; }
.section-nav a:hover { text-decoration: underline; }
.section-nav .secondary-link { padding-top: 1rem; border-top: 1px solid var(--line); }
.content-section { margin-bottom: 3.5rem; scroll-margin-top: 2rem; }
.content-section > h2 { padding-bottom: .8rem; border-bottom: 1px solid var(--line); }
.papers { margin-top: 0; padding-left: 1.8rem; }
.papers > li { margin-bottom: 0; padding: .8rem 0 .8rem .45rem; border-bottom: 1px solid var(--soft-line); }
.papers > li:first-child { padding-top: .25rem; }
.papers > li:last-child { border-bottom: 0; }
.papers > li::marker { color: var(--muted); font-family: var(--serif); font-size: .95rem; }
.papers p { margin: 0; }
.papers a { white-space: normal; }
.publication-search { margin-bottom: 2rem; padding: 1.1rem 1.25rem; background: #f2efea; border-radius: 3px; }
.publication-search label { display: block; margin-bottom: .5rem; font-size: .9rem; font-weight: 600; }
.search-controls { display: flex; align-items: stretch; gap: .6rem; }
.search-controls input { min-width: 0; width: 100%; padding: .55rem .75rem; border: 1px solid #b8b4ac; border-radius: 3px; color: var(--ink); background: var(--surface); font-size: .94rem; }
.search-controls input::placeholder { color: #6d6b67; }
.search-controls button { padding: .45rem .8rem; border: 1px solid #b8b4ac; border-radius: 3px; color: var(--ink); background: var(--surface); font-size: .85rem; cursor: pointer; }
.search-controls button:hover { border-color: var(--accent); color: var(--accent); }
.search-status { margin: .5rem 0 0; color: var(--muted); font-size: .8rem; }
.empty-message { color: var(--muted); font-style: italic; }
.notes-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 1.7rem; }
.notes-list { margin: 0; padding-left: 1.2rem; }
.notes-list li { padding-block: .3rem; }
.notes-list p { margin: 0; }
.cv-list { margin: 0; padding-left: 1.25rem; }
.cv-list li { padding-block: .5rem; }
.cv-list li::marker { color: var(--muted); }
.cv-list p { margin: 0; }
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-top: 3rem;
  padding-block: 1.5rem 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .8rem;
}
.site-footer p { margin: 0; }
.site-footer a { text-decoration: none; }

@media (max-width: 850px) {
  .container { width: calc(100% - 48px); }
  .profile { grid-template-columns: minmax(0, 1fr) 205px; gap: 2rem; }
  .home-details { gap: 2rem; }
  .content-layout { grid-template-columns: 165px minmax(0, 1fr); gap: 1.8rem; }
  .notes-columns { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  body { font-size: 16px; }
  .container { width: calc(100% - 36px); }
  .site-header { display: block; min-height: 0; padding-block: 1rem .6rem; }
  .site-name { display: inline-block; margin-bottom: .6rem; }
  .site-nav ul { gap: .2rem 1.25rem; }
  .site-nav a { font-size: .88rem; }
  .profile { grid-template-columns: 1fr; gap: 2rem; padding-block: 2.5rem; }
  .profile h1 { font-size: 3rem; }
  .portrait { width: min(245px, 80%); margin-top: 0; }
  .home-details { grid-template-columns: 1fr; gap: 1.8rem; padding-block: 2rem; }
  .page-heading { padding-block: 2.5rem 1.5rem; }
  .content-layout { grid-template-columns: 1fr; gap: 1.7rem; }
  .section-nav { position: static; padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
  .section-nav h2 { margin-bottom: .4rem; }
  .section-nav ul { display: flex; flex-wrap: wrap; gap: .1rem 1.2rem; margin-bottom: 0; }
  .section-nav .secondary-link { display: none; }
  .publication-search { padding: 1rem; }
  .content-section > h2 { font-size: 1.6rem; }
  .papers { padding-left: 1.6rem; }
  .papers > li { padding-left: .25rem; }
  .site-footer { flex-wrap: wrap; margin-top: 2rem; }
}
@media print {
  body { color: #000; background: #fff; font-size: 11pt; }
  .container { width: 100%; }
  .site-header, .section-nav, .publication-search, .site-footer, .skip-link, .home-actions { display: none !important; }
  .content-layout { display: block; }
  .profile, .page-heading { padding-block: 0 1rem; }
  .papers > li, .cv-list > li { break-inside: avoid; }
  h2, h3 { break-after: avoid; }
  a { color: #000; }
  .portrait img { box-shadow: none; }
}