:root {
  --paper: #ffffff;
  --ink: #07101f;
  --muted: #5f6f8e;
  --soft: #8391aa;
  --line: #ccd8ec;
  --accent: #1557ff;
  --serif: "Iowan Old Style", "Baskerville", "Times New Roman", "Songti SC", "Noto Serif CJK SC", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --gutter: clamp(24px, 5.8vw, 92px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
}

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  transform: translateY(-160%);
  padding: 10px 14px;
  background: var(--ink);
  color: white;
  text-decoration: none;
}

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

.page-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-height: 100svh;
  width: min(100%, 1600px);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: baseline;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.site-links {
  display: flex;
  gap: clamp(22px, 3vw, 46px);
}

.site-links a {
  position: relative;
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.site-links a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -5px;
  left: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms var(--ease);
}

.site-links a:hover::after,
.site-links a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.home {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(370px, 0.88fr);
  gap: clamp(58px, 9vw, 150px);
  align-items: center;
  padding: clamp(48px, 7vh, 86px) 0;
}

.introduction h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(72px, 7.8vw, 122px);
  font-weight: 500;
  line-height: 0.84;
  letter-spacing: -0.065em;
}

.introduction h1 span {
  display: block;
}

.introduction h1 span:first-child {
  white-space: nowrap;
}

.introduction h1 span[lang] {
  margin-top: 0.2em;
  font-size: 0.52em;
  letter-spacing: -0.05em;
}

.affiliation {
  margin: clamp(38px, 5vh, 58px) 0 0;
  font-size: clamp(16px, 1.3vw, 20px);
  letter-spacing: -0.02em;
}

.thesis {
  max-width: 820px;
  margin: clamp(46px, 6vh, 72px) 0 0;
  font-family: var(--serif);
  font-size: clamp(34px, 3.55vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.038em;
}

.details {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: 1px solid var(--line);
}

.detail-block {
  padding: clamp(32px, 5vh, 62px) 0 clamp(32px, 5vh, 62px) clamp(34px, 4.5vw, 72px);
}

.detail-block + .detail-block {
  border-top: 1px solid var(--line);
}

.detail-heading {
  display: block;
}

.detail-heading h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(29px, 2.4vw, 38px);
  font-weight: 500;
  letter-spacing: -0.035em;
}

.detail-block > p {
  max-width: 600px;
  margin: 24px 0 0;
  color: #263651;
  font-size: clamp(16px, 1.28vw, 19px);
  line-height: 1.5;
}

.project-link {
  display: inline-flex;
  gap: 14px;
  align-items: center;
  margin-top: 25px;
  color: var(--accent);
  font-family: var(--serif);
  font-size: clamp(34px, 3.3vw, 52px);
  line-height: 1;
  letter-spacing: -0.04em;
  text-decoration-thickness: 1px;
  text-underline-offset: 8px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}

@media (max-height: 800px) and (min-width: 1051px) {
  .site-header {
    min-height: 70px;
  }

  .home {
    padding: 24px 0;
  }

  .introduction h1 {
    font-size: clamp(68px, 6.7vw, 92px);
  }

  .affiliation {
    margin-top: 26px;
    font-size: 16px;
  }

  .thesis {
    max-width: 650px;
    margin-top: 32px;
    font-size: clamp(32px, 3vw, 42px);
  }

  .detail-block {
    padding-top: 22px;
    padding-bottom: 22px;
  }

  .detail-heading h2 {
    font-size: 30px;
  }

  .detail-block > p {
    margin-top: 14px;
    font-size: 15px;
  }

  .project-link {
    margin-top: 16px;
    font-size: 38px;
  }

}

@media (max-width: 1050px) {
  .home {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 72px;
  }

  .introduction {
    max-width: 900px;
  }

  .details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .detail-block {
    padding: 42px 42px 0 0;
  }

  .detail-block + .detail-block {
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-left: 42px;
  }
}

@media (max-width: 680px) {
  .site-header {
    min-height: 64px;
  }

  .brand {
    gap: 7px;
    font-size: 16px;
  }

  .site-links {
    gap: 14px;
  }

  .site-links a {
    font-size: 12px;
  }

  .home {
    gap: 36px;
    padding: 32px 0;
  }

  .introduction h1 {
    font-size: clamp(44px, 13vw, 62px);
    line-height: 0.9;
  }

  .introduction h1 span:first-child {
    white-space: normal;
  }

  .affiliation {
    max-width: 330px;
    margin-top: 20px;
    font-size: 15px;
  }

  .thesis {
    margin-top: 26px;
    font-size: clamp(28px, 8vw, 34px);
  }

  .details {
    display: block;
  }

  .detail-block {
    padding: 24px 0;
  }

  .detail-block + .detail-block {
    border-top: 1px solid var(--line);
    border-left: 0;
    padding-left: 0;
  }

  .detail-heading h2 {
    font-size: 27px;
  }

  .detail-block > p {
    margin-top: 12px;
    font-size: 15px;
    line-height: 1.42;
  }

  .project-link {
    margin-top: 12px;
    font-size: 34px;
  }

}

@media (max-width: 420px) {
  .site-links a:last-child {
    display: none;
  }
}