:root {
  color-scheme: light;
  --paper: #fbfbf8;
  --surface: #ffffff;
  --ink: #1f2328;
  --muted: #59636e;
  --line: #d8dee4;
  --accent: #2f5f8f;
  --accent-strong: #24476b;
  --warm: #6b7280;
  --shadow: none;
  --radius: 4px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", "Noto Serif SC", "Noto Serif JP", serif;
  line-height: 1.62;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 16px clamp(18px, 4vw, 56px);
  background: rgba(251, 251, 248, 0.96);
  border-bottom: 1px solid rgba(217, 222, 214, 0.75);
  backdrop-filter: blur(16px);
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
}

.nav {
  display: flex;
  justify-content: center;
  gap: clamp(12px, 2.2vw, 26px);
  color: var(--muted);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--ink);
}

.language-switcher {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.language-switcher button {
  min-width: 44px;
  min-height: 32px;
  padding: 0 10px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
}

.language-switcher button[aria-pressed="true"] {
  background: var(--accent);
  color: white;
}

.section-shell {
  width: min(1040px, calc(100% - 36px));
  margin: 0 auto;
  padding: 54px 0;
}

.band {
  width: 100%;
  padding-inline: max(18px, calc((100% - 1040px) / 2));
  background: var(--surface);
  border-block: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 310px);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
  min-height: auto;
  padding-top: 52px;
  padding-bottom: 42px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--warm);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: none;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  max-width: 720px;
  font-size: clamp(2.35rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.02rem;
  line-height: 1.35;
}

.hero-role {
  margin-bottom: 16px;
  color: var(--accent-strong);
  font-size: clamp(1rem, 1.8vw, 1.22rem);
  font-weight: 700;
}

.hero-intro {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-actions,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent);
  color: white;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
}

.portrait-frame {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.portrait-frame::after {
  content: none;
}

.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 15%;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(180px, 0.34fr) minmax(0, 1fr);
  gap: 24px;
  align-items: end;
  margin-bottom: 22px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.section-heading.compact {
  display: block;
  margin-bottom: 20px;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.two-column {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 76px);
}

.publication-card,
.news-item,
.timeline-item,
.stack-item,
.visitor-panel,
.contact-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.publication-card p,
.news-item p,
.timeline-item p,
.stack-item p,
.visitor-panel p,
.contact-panel p {
  margin-bottom: 0;
  color: var(--muted);
}

.publication-list,
.news-list,
.timeline,
.stack-list {
  display: grid;
  gap: 10px;
}

.news-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 18px;
  padding: 12px 14px;
}

.news-item span {
  color: var(--accent);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
}

.publication-card {
  display: grid;
  grid-template-columns: minmax(190px, 0.32fr) minmax(0, 1fr);
  gap: 18px;
  padding: 0;
  overflow: hidden;
}

.publication-figure {
  margin: 0;
  min-height: 190px;
  background: #f6f8fa;
  border-right: 1px solid var(--line);
}

.publication-figure img {
  width: 100%;
  height: 100%;
  min-height: 190px;
  object-fit: cover;
}

.publication-body {
  display: grid;
  gap: 10px;
  align-content: center;
  padding: 18px 18px 18px 0;
}

.publication-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.publication-links a {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--accent-strong);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
}

.publication-links a:hover,
.publication-links a:focus-visible {
  border-color: var(--accent);
  background: rgba(15, 111, 110, 0.08);
}

.publication-meta,
.timeline-date,
.stack-date {
  color: var(--accent);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  white-space: nowrap;
}

.timeline-item,
.stack-item {
  padding: 20px;
}

.timeline-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
}

.visitor-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 24px;
  align-items: center;
  padding: 18px;
}

.visitor-widget {
  display: flex;
  justify-content: flex-end;
}

.visitor-widget img {
  max-width: 100%;
  height: auto;
  border: 0;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-list span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--accent-strong);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 600;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  padding: 28px;
}

.site-footer {
  padding: 28px 18px 44px;
  color: var(--muted);
  text-align: center;
  font-size: 0.92rem;
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .nav {
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .language-switcher {
    width: max-content;
  }

  .hero,
  .section-heading,
  .publication-card,
  .publication-head,
  .visitor-panel,
  .two-column {
    grid-template-columns: 1fr;
  }

  .publication-figure {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .publication-body {
    padding: 20px;
  }

  .hero {
    min-height: auto;
  }

  .portrait-frame {
    max-width: 420px;
  }

  .visitor-widget {
    justify-content: flex-start;
  }
}

@media (max-width: 620px) {
  .section-shell {
    width: min(100% - 28px, 1120px);
    padding: 56px 0;
  }

  .band {
    padding-inline: 14px;
  }

  .hero {
    padding-top: 34px;
  }

  h1 {
    font-size: 2.85rem;
  }

  .publication-card,
  .timeline-item,
  .news-item,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .publication-meta,
  .timeline-date,
  .stack-date {
    white-space: normal;
  }
}