:root { color-scheme: light; --ink: #171717; --muted: #646464; --link: #2677b7; --line: #e5e5e5; --paper: #fdfdfd; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 400 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif; -webkit-text-size-adjust: 100%; }
a { color: var(--link); text-decoration: none; overflow-wrap: anywhere; }
a:hover { text-decoration: underline; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--link); outline-offset: 5px; border-radius: 1px; }
.wrapper { max-width: 800px; margin-inline: auto; padding-inline: 30px; }
.site-header { border-top: 5px solid #424242; border-bottom: 1px solid var(--line); }
.identity { min-height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.site-title { font-size: 26px; font-weight: 300; letter-spacing: -1px; color: #424242; }
.language-link { font-size: 14px; }
.site-nav { display: flex; justify-content: flex-end; gap: 21px; flex-wrap: wrap; padding: 13px 0 15px; }
.site-nav a { color: var(--ink); line-height: 1.5; }
.site-nav a[aria-current="page"] { text-decoration: underline; text-decoration-color: #9a9a9a; text-underline-offset: 7px; text-decoration-thickness: 1px; }
.mobile-menu { display: none; }
main { padding: 29px 0 55px; min-height: 60vh; }
h1, h2, h3 { font-weight: 400; line-height: 1.25; }
h1 { margin: 0 0 29px; font-size: 42px; letter-spacing: -1px; }
h2 { margin: 36px 0 17px; font-size: 28px; letter-spacing: -.4px; }
h3 { margin: 27px 0 12px; font-size: 21px; }
p { margin: 0 0 19px; }
ul, ol { margin: 0 0 24px; padding-left: 23px; }
li { margin-bottom: 8px; }
strong, b { font-weight: 600; }
.profile-intro { font-size: 18px; line-height: 1.65; }
.profile-links { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 27px; }
.interests { margin-bottom: 26px; }
.interests li { margin-bottom: 6px; }
.section-links { display: flex; flex-wrap: wrap; gap: 7px 20px; margin: -9px 0 31px; padding-bottom: 17px; border-bottom: 1px solid var(--line); font-size: 15px; }
section { scroll-margin-top: 24px; }
.publications { list-style: none; padding: 0; }
.publications li { margin: 0 0 28px; padding-bottom: 25px; border-bottom: 1px solid var(--line); }
.publications li:last-child { border-bottom: 0; }
.publications p { margin: 0; }
.pub-title { display: block; font-size: 18px; line-height: 1.45; font-weight: 500; margin: 4px 0 6px; }
.publication-note { font-size: 14px; color: var(--muted); }
.presentations p { margin: 0 0 26px; }
.presentations .entry { margin-bottom: 26px; }
.cv-list p { margin-bottom: 23px; }
.download-link { display: inline-block; margin-bottom: 5px; }
.small, .source-note { font-size: 14px; color: var(--muted); }
.source-note { margin-top: 26px; }
address { font-style: normal; margin-bottom: 24px; }
.email-image { width: 301px; height: auto; max-width: 100%; vertical-align: middle; }
.site-footer { border-top: 1px solid var(--line); padding: 29px 0 34px; color: var(--muted); font-size: 14px; }
.footer-heading { display: flex; gap: 22px; flex-wrap: wrap; margin-bottom: 18px; }
.footer-heading p { margin: 0; }
.footer-links { display: flex; gap: 9px 23px; flex-wrap: wrap; list-style: none; padding: 0; margin: 0; }
.footer-links li { margin: 0; }
img { max-width: 100%; height: auto; }
.oscillator-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; margin: 28px 0; }
figure { margin: 0; }
.oscillator-grid figure { text-align: center; }
.oscillator-grid img { width: 100%; }
figcaption { font-size: 15px; color: var(--muted); margin-top: 4px; }
.equation { display: block; max-width: 100%; width: auto; max-height: 100px; margin: 24px 0; }
.skip-link { position: absolute; top: -80px; left: 20px; padding: 8px 14px; background: white; z-index: 10; }
.skip-link:focus { top: 8px; }
html[lang="ja"] { line-break: strict; }
html[lang="ja"] main { line-height: 1.85; }
html[lang="ja"] .site-nav { gap: 26px; }
@media (max-width: 760px) {
  .site-nav { gap: 12px 19px; justify-content: flex-start; }
}
@media (max-width: 600px) {
  .wrapper { padding-inline: 22px; }
  .identity { min-height: 66px; }
  .site-title { font-size: 26px; }
  .desktop-nav { display: none; }
  .mobile-menu { display: block; padding-bottom: 14px; }
  .mobile-menu summary { display: inline-block; cursor: pointer; border: 1px solid #c9c9c9; padding: 4px 12px; border-radius: 3px; font-size: 15px; }
  .mobile-menu summary::after { content: " +"; }
  .mobile-menu[open] summary::after { content: " −"; }
  .mobile-menu .site-nav { display: grid; grid-template-columns: 1fr 1fr; padding: 18px 0 2px; gap: 15px 18px; }
  .site-nav a { padding: 3px 0; }
  main { padding: 29px 0 42px; }
  h1 { font-size: 34px; margin-bottom: 25px; }
  h2 { font-size: 26px; }
  .profile-intro { font-size: 17px; }
  .oscillator-grid { grid-template-columns: 1fr; }
  .footer-heading { gap: 5px 18px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  body { background: white; font-size: 11pt; }
  .site-header, .site-footer, .skip-link, .section-links { display: none; }
  .wrapper { max-width: none; padding: 0; }
  main { padding: 0; }
  a { color: inherit; text-decoration: underline; }
  .publications li, .cv-list p { break-inside: avoid; }
}