:root {
  --bg: #f4f3ef;
  --surface: #e9e7e0;
  --surface-strong: #dedbd1;
  --text: #171816;
  --muted: #666860;
  --line: #c9c7bf;
  --accent: #234a3c;
  --accent-contrast: #f4f3ef;
  --header-bg: rgba(244, 243, 239, 0.92);
  color-scheme: light;
  font-synthesis: none;
}

:root[data-theme="dark"] {
  --bg: #171916;
  --surface: #20231f;
  --surface-strong: #292d28;
  --text: #ecece5;
  --muted: #a9aca3;
  --line: #3b3f39;
  --accent: #a8c7b9;
  --accent-contrast: #171916;
  --header-bg: rgba(23, 25, 22, 0.92);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Helvetica Neue", "Noto Sans JP", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -0.01em;
  text-rendering: optimizeLegibility;
  transition: background-color 180ms ease, color 180ms ease;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

img {
  display: block;
  max-width: 100%;
}

::selection {
  background: var(--accent);
  color: var(--accent-contrast);
}

.shell {
  width: min(100% - 48px, 1180px);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: var(--header-bg);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 72px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 32px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: max-content;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.wordmark-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--text);
  border-radius: 50%;
  font-size: 10px;
  letter-spacing: 0.06em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 13px;
  color: var(--muted);
}

.site-nav a,
.text-link,
.link-list a,
.footer-inner a {
  position: relative;
}

.site-nav a::after,
.text-link::after,
.link-list a::after,
.footer-inner a::after {
  position: absolute;
  right: 0;
  bottom: -3px;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.text-link:hover::after,
.text-link:focus-visible::after,
.link-list a:hover::after,
.link-list a:focus-visible::after,
.footer-inner a:hover::after,
.footer-inner a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.theme-toggle {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
}

.theme-toggle-dot {
  width: 11px;
  height: 11px;
  border: 1px solid currentColor;
  border-radius: 50%;
  background: transparent;
  transition: background-color 180ms ease, transform 180ms ease;
}

[data-theme="dark"] .theme-toggle-dot {
  background: var(--accent);
  transform: scale(0.75);
}

.hero {
  min-height: calc(100vh - 73px);
  display: flex;
  align-items: center;
  padding-block: clamp(72px, 10vw, 128px);
}

.hero-body {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  align-items: center;
  gap: clamp(48px, 8vw, 118px);
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Yu Mincho", serif;
  font-size: clamp(60px, 8.6vw, 122px);
  font-weight: 400;
  line-height: 0.82;
  letter-spacing: -0.065em;
}

.hero h1 > span {
  display: block;
}

.hero h1 .hero-name-jp {
  margin-top: 30px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Noto Serif JP", serif;
  font-size: clamp(21px, 2.3vw, 30px);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.16em;
}

.hero-intro {
  max-width: 650px;
  margin: clamp(44px, 6vw, 74px) 0 0;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", "Yu Mincho", serif;
  font-size: clamp(19px, 1.7vw, 23px);
  font-weight: 400;
  line-height: 1.62;
  letter-spacing: -0.012em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  margin-top: 34px;
}

.text-link {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  font-size: 13px;
  font-weight: 600;
}

.portrait-wrap {
  width: min(100%, 360px);
  margin-left: auto;
  align-self: center;
}

.portrait-frame {
  position: relative;
  overflow: hidden;
  width: min(100%, 360px);
  aspect-ratio: 3 / 5;
  margin-left: auto;
  background: var(--surface-strong);
}

.portrait-frame::after {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.2);
  content: "";
  pointer-events: none;
}

.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  filter: grayscale(1) contrast(0.94);
  transition: filter 350ms ease, transform 700ms cubic-bezier(.2,.7,.2,1);
}

.portrait-frame:hover img {
  filter: grayscale(0.15) contrast(0.98);
  transform: scale(1.018);
}

.section {
  padding-block: clamp(90px, 12vw, 164px);
  scroll-margin-top: 72px;
}

.section-grid {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: clamp(48px, 8vw, 106px);
}

.section-kicker {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 13px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section-kicker span {
  color: var(--accent);
}

.section-kicker p {
  margin: 0;
}

.section-content > h2,
.section-heading-row h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Yu Mincho", serif;
  font-size: clamp(43px, 5.6vw, 76px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.lead {
  max-width: 790px;
  margin: 48px 0 0;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", "Yu Mincho", serif;
  font-size: clamp(19px, 2.1vw, 27px);
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: -0.02em;
}

.split-block {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 36px;
  margin-top: 92px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.split-block h3,
.recognition-grid > div > h3,
.detail-grid h3 {
  margin: 0;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 28px;
  padding: 0 0 26px;
}

.timeline li + li {
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.timeline p,
.timeline h4 {
  margin: 0;
}

.timeline-date {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
}

.timeline h4 {
  font-size: 18px;
  font-weight: 550;
  line-height: 1.4;
}

.timeline h4 + p {
  margin-top: 3px;
  color: var(--muted);
  font-size: 14px;
}

.section-tinted {
  background: var(--surface);
}

.section-heading-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 64px;
}

.section-heading-row > p {
  margin: 0 0 9px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.publication-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.publication-group + .publication-group {
  margin-top: 74px;
}

.publication-group-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.publication-group-heading h3,
.publication-group-heading span {
  margin: 0;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.publication-group-heading span {
  color: var(--accent);
}

.publication-item {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  gap: 24px;
  padding-block: 30px;
  border-bottom: 1px solid var(--line);
}

.publication-number {
  padding-top: 4px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
}

.publication-meta {
  margin: 0 0 9px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.publication-item h3 {
  margin: 0;
  font-size: clamp(17px, 1.65vw, 21px);
  font-weight: 550;
  line-height: 1.55;
}

.publication-item h3 a {
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 100% 100%;
  background-repeat: no-repeat;
  background-size: 0 1px;
  transition: background-size 220ms ease, background-position 0s 220ms;
}

.publication-item h3 a:hover,
.publication-item h3 a:focus-visible {
  background-position: 0 100%;
  background-size: 100% 1px;
}

.publication-authors {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.publication-arrow {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.publication-arrow:hover,
.publication-arrow:focus-visible {
  background: var(--accent);
  color: var(--accent-contrast);
  transform: translate(2px, -2px);
}

.recognition-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(72px, 10vw, 120px);
  margin-top: 62px;
}

.award-list {
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.award-list > li {
  border-bottom: 1px solid var(--line);
}

.award-item {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  gap: 24px;
  padding-block: 30px;
}

.award-number {
  padding-top: 4px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
}

.award-venue {
  margin: 0 0 9px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.award-body h4 {
  margin: 0;
  font-size: clamp(17px, 1.65vw, 21px);
  font-weight: 550;
  line-height: 1.55;
}

.award-body h4 a:hover,
.award-body h4 a:focus-visible {
  color: var(--accent);
}

.award-authors {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.honor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.honor-list li {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.45;
}

.project-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 42px;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.project-list li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 18px;
  padding-block: 26px;
  border-bottom: 1px solid var(--line);
}

.project-number,
.project-list p {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
}

.project-list p {
  margin: 0 0 8px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.project-list h4 {
  margin: 0;
  font-size: 15px;
  font-weight: 550;
  line-height: 1.6;
}

.project-list h4 a:hover,
.project-list h4 a:focus-visible {
  color: var(--accent);
}

.compact-section {
  padding-top: 24px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 34px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.tag-list,
.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
}

.link-list {
  gap: 12px 20px;
}

.link-list a {
  font-size: 13px;
  font-weight: 600;
}

.vertical-link-list {
  flex-direction: column;
  align-items: flex-start;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  min-height: 104px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-inner p {
  margin: 0;
}

.footer-inner p:nth-child(2) {
  text-align: center;
}

.footer-inner a {
  justify-self: end;
}

.page-shell,
.article-shell {
  min-height: 70vh;
  padding-block: clamp(80px, 12vw, 150px);
}

.page-header,
.article-header {
  padding-bottom: 44px;
  border-bottom: 1px solid var(--line);
}

.page-header h1,
.article-header h1 {
  max-width: 920px;
  margin: 0;
  font-family: Georgia, "Times New Roman", "Yu Mincho", serif;
  font-size: clamp(52px, 7vw, 94px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.05em;
}

.post-list {
  border-bottom: 1px solid var(--line);
}

.post-row {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  align-items: center;
  gap: 28px;
  padding-block: 28px;
  border-top: 1px solid var(--line);
}

.post-row > p {
  margin: 0;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
}

.post-row h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 550;
}

.article-shell {
  max-width: 980px;
}

.article-content {
  max-width: 720px;
  margin: 64px auto 0;
  font-family: Georgia, "Times New Roman", "Yu Mincho", serif;
  font-size: 18px;
  line-height: 1.9;
}

.article-content img {
  margin-block: 42px;
}

.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
}

.page-link {
  display: grid;
  min-width: 36px;
  min-height: 36px;
  place-items: center;
  border: 1px solid var(--line);
  font-size: 12px;
}

.page-item.active .page-link {
  background: var(--accent);
  color: var(--accent-contrast);
}

.visually-hidden {
  position: absolute;
  overflow: hidden;
  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
  margin: -1px;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.reveal {
  opacity: 0;
  animation: reveal 700ms cubic-bezier(.2,.7,.2,1) forwards;
}

.reveal-1 { animation-delay: 80ms; }
.reveal-2 { animation-delay: 160ms; }
.reveal-3 { animation-delay: 260ms; }
.reveal-4 { animation-delay: 360ms; }

@keyframes reveal {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@media (max-width: 900px) {
  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .hero {
    display: flex;
  }

  .hero-body {
    grid-template-columns: 1fr 0.7fr;
    gap: 48px;
  }

  .hero h1 {
    font-size: clamp(56px, 9vw, 82px);
  }

  .section-grid {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 44px;
  }

  .split-block,
  .recognition-grid {
    grid-template-columns: 1fr;
  }

  .recognition-grid {
    gap: 64px;
  }

  .detail-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .shell {
    width: min(100% - 32px, 1180px);
  }

  .site-header {
    position: relative;
  }

  .header-inner {
    min-height: 64px;
  }

  .wordmark-name,
  .theme-toggle-label {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-block: 72px;
  }

  .hero-body {
    grid-template-columns: 1fr;
    gap: 54px;
  }

  .hero-copy {
    display: contents;
  }

  .hero h1 {
    order: 1;
    font-size: clamp(58px, 19vw, 82px);
    line-height: 0.88;
  }

  .hero .eyebrow {
    order: 0;
    margin-bottom: -34px;
  }

  .portrait-wrap {
    order: 2;
    width: min(84vw, 360px);
    margin-left: auto;
  }

  .hero-intro {
    order: 3;
    margin-top: -12px;
  }

  .hero-actions {
    order: 4;
    margin-top: -28px;
  }

  .section {
    padding-block: 88px;
  }

  .section-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .section-kicker {
    padding: 0 0 14px;
    border-bottom: 1px solid var(--line);
  }

  .section-content > h2,
  .section-heading-row h2 {
    font-size: clamp(42px, 13vw, 62px);
  }

  .lead {
    margin-top: 34px;
    font-size: 19px;
  }

  .split-block {
    margin-top: 68px;
  }

  .timeline li {
    grid-template-columns: 90px 1fr;
    gap: 18px;
  }

  .section-heading-row {
    align-items: baseline;
    margin-bottom: 42px;
  }

  .publication-item {
    grid-template-columns: 28px minmax(0, 1fr) auto;
    gap: 12px;
    padding-block: 24px;
  }

  .award-item {
    grid-template-columns: 28px minmax(0, 1fr) auto;
    gap: 12px;
    padding-block: 24px;
  }

  .project-list {
    grid-template-columns: 1fr;
  }

  .publication-arrow {
    width: 32px;
    height: 32px;
  }

  .detail-grid {
    grid-template-columns: 1fr;
    gap: 46px;
  }

  .compact-section {
    padding-top: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
    padding-block: 28px;
  }

  .footer-inner p:nth-child(2) {
    display: none;
  }

  .post-row {
    grid-template-columns: 1fr auto;
  }

  .post-row > p {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}