:root {
  --bg: #f6f4ef;
  --paper: #fbfaf7;
  --header-bg: rgba(246, 244, 239, 0.9);
  --text: #191713;
  --muted: #5c5851;
  --line: #d7d1c7;
  --line-secondary: #d7d1c741;
  --accent: #471818;
  --container: 76rem;
  --header-offset: 5rem;
  --space-1: 0.5rem;
  --space-2: 0.9rem;
  --space-3: 1.4rem;
  --space-4: 2.2rem;
  --space-5: 3.2rem;
  --font-sans:
    "IBM Plex Sans", Arial, "Helvetica Neue", Helvetica, "Microsoft YaHei",
    "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC",
    sans-serif;
  --font-serif:
    "Cormorant Garamond", Arial, "Helvetica Neue", Helvetica, "Microsoft YaHei",
    "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC",
    serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #191713;
    --paper: #1f1c19;
    --header-bg: rgba(25, 23, 19, 0.9);
    --text: #f6f4ef;
    --muted: #d7d1c7;
    --line: #5c5851;
    --line-secondary: #5c585141;
    --accent: #7e5b38;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-sans);
  line-height: 1.55;
}

a {
  color: var(--accent);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
}

.header-inner,
main,
.site-footer {
  width: min(100% - 2.2rem, var(--container));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.2rem;
  gap: var(--space-3);
}

.brand {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--text);
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.main-nav a {
  color: var(--text);
  text-decoration: none;
}

.main-nav a:hover,
.main-nav a:focus-visible,
.main-nav a.is-active {
  color: var(--text);
}

.section {
  border-bottom: 1px solid var(--line);
  padding: var(--space-5) 0;
  scroll-margin-top: var(--header-offset);
}

.hero {
  min-height: clamp(20rem, 55vh, 34rem);
  display: grid;
  align-content: center;
  gap: var(--space-3);
}

.hero-photo {
  width: clamp(9rem, 20vw, 13rem);
  aspect-ratio: 1 / 1;
  margin: 0;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--paper);
  box-shadow: 0 14px 28px rgba(25, 23, 19, 0.08);
}

.hero-photo img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.kicker {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

h1,
h2,
.item-title,
.pub-title {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.1;
  margin: 0;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 4.2rem);
}

h2 {
  font-size: clamp(1.8rem, 2.7vw, 2.7rem);
  margin-bottom: var(--space-3);
}

.alt-name {
  color: var(--muted);
  font-size: 0.78em;
}

.lede {
  max-width: 64ch;
  font-size: 1.07rem;
  margin: 0;
}

.hero-links {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--text);
  color: var(--text);
  text-decoration: none;
  padding: 0.55rem 1rem;
  font-size: 0.94rem;
  transition:
    transform 200ms ease,
    background-color 200ms ease;
}

.button-link:hover,
.button-link:focus-visible {
  background: var(--accent);
  transform: translateY(-1px);
  outline: none;
}

.section p {
  margin-top: 0;
  margin-bottom: var(--space-2);
  max-width: 75ch;
}

.tag-list,
.timeline,
.contact-links,
.publication-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.tag-list li {
  border: 1px solid var(--line-secondary);
  background: var(--paper);
  padding: 0.35rem 0.75rem;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.publication-list li {
  padding: var(--space-3) 0;
  border-top: 1px solid var(--line-secondary);
}

.pub-title {
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  margin-bottom: 0.35rem;
}

.pub-meta {
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.inline-link {
  color: var(--accent);
  text-underline-offset: 0.2rem;
}

.timeline li {
  display: grid;
  grid-template-columns: minmax(6.5rem, 8rem) 1fr;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-top: 1px solid var(--line-secondary);
}

.time {
  color: var(--muted);
  font-size: 0.95rem;
}

.item-title {
  font-size: 1.35rem;
  margin-bottom: 0.15rem;
}

.role-tag {
  display: inline-block;
  margin-left: 0.55rem;
  padding: 0.1rem 0.5rem;
  border: 1px solid var(--line-secondary);
  border-radius: 999px;
  background: var(--paper);
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: middle;
}

.role-tag-accent {
  border-color: var(--accent);
  background: var(--accent);
  color: #fbfaf7;
}

.contact-links li {
  margin-bottom: 0.5rem;
}

.site-footer {
  padding: var(--space-4) 0 var(--space-5);
  color: var(--muted);
  font-size: 0.9rem;
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 550ms ease,
    transform 550ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 760px) {
  :root {
    --header-offset: 7.5rem;
  }

  .hero-photo {
    width: min(46vw, 11rem);
  }

  .header-inner {
    min-height: auto;
    padding: 0.9rem 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .section {
    padding: var(--space-4) 0;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .button-link {
    transition: none;
  }
}