:root {
  --bg: #ffffff;
  --text: #151515;
  --heading: #343a40;
  --muted: #606a73;
  --line: #dfe4e8;
  --accent: #1f6feb;
  --accent-soft: #f1f7ff;
  --card: #ffffff;
  --max-width: 980px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, Arial, sans-serif;
  line-height: 1.7;
  font-size: 16px;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.container {
  width: min(calc(100% - 36px), var(--max-width));
  margin: 0 auto;
}

.site-header {
  padding: 36px 0 18px;
  border-bottom: 1px solid var(--line);
}

.header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
}

.site-title {
  margin: 0;
  color: var(--heading);
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.site-subtitle {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.lang-switch {
  white-space: nowrap;
  font-weight: 650;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 24px;
  font-size: 0.94rem;
}

.nav a {
  color: var(--heading);
}

main {
  padding: 24px 0 60px;
}

section {
  padding: 26px 0;
}

.section-title {
  margin: 0 0 18px;
  padding-bottom: 7px;
  border-bottom: 2px solid var(--heading);
  color: var(--heading);
  font-size: 1.45rem;
  letter-spacing: 0.01em;
}

.profile {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

.profile-photo {
  width: 190px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #f4f5f6;
}

.profile-details {
  margin: 0;
  display: grid;
  grid-template-columns: 8.5em minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 8px;
}

.profile-details dt {
  color: var(--heading);
  font-weight: 700;
}

.profile-details dd {
  margin: 0;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 20px;
}

.link-row a,
.pub-links a {
  font-weight: 650;
}

.timeline,
.awards,
.domestic-list,
.experience-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.timeline li,
.awards li,
.experience-list li {
  display: grid;
  grid-template-columns: 8.5em minmax(0, 1fr);
  gap: 16px;
  padding: 8px 0;
}

.date {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.publication-list {
  display: grid;
  gap: 18px;
}

.publication-card {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 22px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
}

.publication-card.featured {
  border-left: 4px solid var(--accent);
  background: linear-gradient(90deg, var(--accent-soft), #ffffff 55%);
}

.teaser {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #f4f5f6;
  align-self: center;
}

.venue {
  margin-bottom: 5px;
  color: var(--heading);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}

.pub-title {
  margin: 0 0 8px;
  color: var(--heading);
  font-size: 1.12rem;
  line-height: 1.4;
}

.authors {
  margin: 0 0 10px;
}

.me {
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
}

.badge {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 7px;
  border: 1px solid #a9c9f7;
  border-radius: 999px;
  background: #eaf3ff;
  color: #1457b2;
  font-size: 0.78rem;
  font-weight: 800;
  vertical-align: 1px;
}

.pub-note {
  margin: 7px 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 8px;
}

.awards li.highlight {
  margin: 4px 0 10px;
  padding: 11px 12px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
}

.domestic-list {
  counter-reset: domestic;
}

.domestic-list li {
  counter-increment: domestic;
  position: relative;
  padding: 0 0 15px 2.2em;
}

.domestic-list li::before {
  content: counter(domestic) ".";
  position: absolute;
  left: 0;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.presentation-note {
  color: #1457b2;
  font-weight: 700;
  white-space: nowrap;
}

.simple-note {
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: #f7f9fb;
}

footer {
  padding: 22px 0 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 700px) {
  .header-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .profile {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .profile-photo {
    width: min(190px, 55vw);
  }

  .profile-details,
  .timeline li,
  .awards li,
  .experience-list li {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .publication-card {
    grid-template-columns: 1fr;
  }

  .teaser {
    width: min(100%, 440px);
  }
}