:root {
  --bg: #ffffff;
  --ink: #1f2833;
  --muted: #5d6873;
  --line: #d8dde3;
  --link: #1c4f80;
  --max-width: 940px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.7;
}

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

a:hover,
a:focus-visible {
  text-decoration: underline;
  outline: none;
}

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

p,
li {
  font-size: 1.03rem;
}

.page {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 3rem;
}

.site-header {
  margin-bottom: 2rem;
}

.site-header-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.site-name {
  color: var(--ink);
  font-size: 1.85rem;
  font-weight: 700;
}

.site-name:hover,
.site-name:focus-visible {
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}

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

.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.home-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 2rem;
  align-items: start;
}

.page-title {
  margin: 0 0 0.45rem;
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  line-height: 1.1;
}

.page-title-small {
  font-size: 2.25rem;
}

.position {
  margin: 0 0 0.35rem;
  font-size: 1.16rem;
}

.link-line {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.portrait {
  border: 1px solid var(--line);
}

.content-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.first-section {
  margin-top: 0;
}

.content-section h2 {
  margin: 0 0 1rem;
  font-size: 1.75rem;
  line-height: 1.2;
}

.section-note {
  margin: 0 0 1.15rem;
  color: var(--muted);
}

.plain-list,
.talk-list,
.publication-list {
  margin: 0;
  padding-left: 1.35rem;
}

.selected-talk-list {
  margin: 0;
  padding-left: 1.35rem;
}

.plain-list {
  list-style: none;
  padding-left: 0;
}

.plain-list li {
  margin-bottom: 0.6rem;
}

.publication-list li,
.talk-list li {
  margin-bottom: 0.95rem;
}

.selected-talk-list li {
  margin-bottom: 1.15rem;
}

.item-title {
  font-style: italic;
}

.talk-detail,
.talk-resources {
  display: block;
}

.talk-resources {
  font-size: 0.98rem;
}

@media (max-width: 760px) {
  .page {
    width: min(var(--max-width), calc(100% - 1rem));
    padding-top: 1rem;
  }

  .site-header-top,
  .home-layout {
    grid-template-columns: 1fr;
    display: grid;
  }

  .site-nav {
    gap: 0.85rem;
  }

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