:root {
  --ink: #222222;
  --muted: #6d6d6d;
  --soft: #8b8b8b;
  --line: #e2e2e2;
  --accent: #267cb9;
  --background: #ffffff;
  --max-width: 980px;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--background);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--ink);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 1px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 8px 12px;
  color: var(--background);
  background: var(--ink);
  font-size: 0.875rem;
  transform: translateY(-160%);
  transition: transform 150ms ease;
}

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

.site-shell {
  width: min(calc(100% - 48px), var(--max-width));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 74px;
  padding-block: 72px 48px;
}

.site-sidebar {
  position: sticky;
  top: 56px;
  align-self: start;
}

.site-title {
  display: inline-block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.15;
  text-decoration: none;
}

.site-title::after {
  content: "";
  display: block;
  width: 38px;
  height: 2px;
  margin-top: 20px;
  background: var(--accent);
}

.site-title:hover {
  color: var(--ink);
}

.site-description {
  margin: 24px 0 0;
  color: #4b4b4b;
  font-size: 0.95rem;
  line-height: 1.55;
}

.site-institution {
  margin: 16px 0 0;
  color: var(--soft);
  font-size: 0.82rem;
  line-height: 1.5;
}

.site-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  margin-top: 34px;
  font-size: 0.88rem;
}

.site-nav a {
  text-decoration: none;
}

.site-nav span {
  font-size: 0.82em;
}

main {
  min-width: 0;
}

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

.term {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h3 {
  font-family: var(--serif);
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(2.35rem, 5vw, 3.7rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.page-intro {
  max-width: 62ch;
  margin-bottom: 0;
  color: #4f4f4f;
  font-size: 1.02rem;
}

.section-heading {
  margin: 48px 0 4px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.talk-list {
  margin-top: 6px;
}

.talk {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 30px;
  padding-block: 32px 36px;
  border-top: 1px solid var(--line);
}

.talk:first-child {
  border-top: 0;
}

.talk-date {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  color: var(--muted);
  font-style: normal;
  line-height: 1.1;
}

.talk-date-month {
  margin-bottom: 5px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.talk-date-day {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 2rem;
  letter-spacing: -0.025em;
}

.talk-date-year {
  margin-top: 5px;
  color: var(--soft);
  font-size: 0.75rem;
}

.talk-speaker {
  margin-bottom: 7px;
  font-size: 0.95rem;
  font-weight: 600;
}

.talk-speaker span {
  margin-left: 8px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 400;
}

.talk-content h3 {
  margin-bottom: 8px;
  font-size: clamp(1.35rem, 2.7vw, 1.7rem);
  font-weight: 500;
  letter-spacing: -0.018em;
  line-height: 1.3;
}

.talk-details {
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 0.86rem;
}

.abstract h4 {
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.abstract p {
  max-width: 68ch;
  margin-bottom: 0;
  color: #3e3e3e;
}

.talk-placeholder .talk-date-day {
  font-size: 1.25rem;
}

.talk-placeholder .talk-speaker,
.talk-placeholder h3,
.talk-placeholder .abstract p {
  color: var(--muted);
}

.about {
  margin-top: 20px;
  padding-top: 2px;
  border-top: 1px solid var(--line);
}

.about p {
  max-width: 68ch;
  margin: 24px 0 0;
  color: #454545;
}

.site-footer {
  margin-top: 58px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin-bottom: 0;
  color: var(--soft);
  font-size: 0.78rem;
}

@media (max-width: 760px) {
  .site-shell {
    grid-template-columns: 1fr;
    gap: 54px;
    padding-top: 44px;
  }

  .site-sidebar {
    position: static;
    max-width: 440px;
  }

  .site-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px 20px;
    margin-top: 26px;
  }
}

@media (max-width: 520px) {
  .site-shell {
    width: min(calc(100% - 32px), var(--max-width));
    gap: 44px;
    padding-block: 34px 34px;
  }

  .page-header {
    padding-bottom: 34px;
  }

  .talk {
    grid-template-columns: 1fr;
    gap: 16px;
    padding-block: 28px 32px;
  }

  .talk-date {
    flex-direction: row;
    align-items: baseline;
    gap: 7px;
  }

  .talk-date-month {
    margin-bottom: 0;
  }

  .talk-date-day {
    font-size: 1.25rem;
  }

  .talk-date-year {
    margin-top: 0;
  }

  .talk-speaker span {
    display: block;
    margin: 2px 0 0;
  }
}

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

  .skip-link {
    transition: none;
  }
}