:root {
  color-scheme: light;
  --background: #ffffff;
  --foreground: #1a1a1a;
  --muted: #666666;
  --subtle: #999999;
  --link: #2a5a7a;
  --link-hover: #000000;
  --rule: rgba(0, 0, 0, 0.1);
  --control-hover: rgba(42, 90, 122, 0.08);
  --focus: #2a5a7a;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --background: #161616;
  --foreground: #ededed;
  --muted: #c0c0c0;
  --subtle: #8f8f8f;
  --link: #9bc6e5;
  --link-hover: #ffffff;
  --rule: rgba(255, 255, 255, 0.15);
  --control-hover: rgba(155, 198, 229, 0.13);
  --focus: #9bc6e5;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  min-width: 0;
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: "Libre Baskerville", Georgia, "Times New Roman", serif;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  transition: background-color 160ms ease, color 160ms ease;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

a {
  color: var(--link);
  text-decoration: none;
  transition: color 160ms ease;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.page-shell {
  width: min(100% - 64px, 700px);
  margin: 0 auto;
  padding: 32px 0;
}

.site-header {
  position: relative;
  padding-right: 36px;
}

.controls {
  position: absolute;
  top: 3px;
  right: 0;
  display: flex;
}

.control-button {
  min-width: 0;
  padding: 3px 5px;
  border: 0;
  border-radius: 2px;
  background: transparent;
  color: var(--subtle);
  cursor: pointer;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 11px;
  line-height: 1.2;
  transition: background-color 160ms ease, color 160ms ease;
}

.control-button:hover {
  background: var(--control-hover);
  color: var(--link);
}

.icon-button {
  width: auto;
  font-size: 14px;
}

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

h1 {
  margin-bottom: 7px;
  color: var(--foreground);
  font-size: 1.6rem;
  font-weight: 400;
  letter-spacing: -0.3px;
  line-height: 1.2;
  white-space: nowrap;
}

.name-zh {
  color: var(--subtle);
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 0.68em;
  font-weight: 400;
  letter-spacing: 0.12em;
}

h2 {
  margin-bottom: 12px;
  color: var(--foreground);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  line-height: 1.35;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 6px;
  margin: 0;
  font-size: 0.84rem;
  letter-spacing: 0.3px;
}

.profile-links span {
  color: var(--subtle);
  font-size: 0.78rem;
}

.intro {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.intro p {
  margin-bottom: 8px;
}

.intro p:last-child {
  margin-bottom: 0;
}

section {
  margin-top: 14px;
  padding-top: 13px;
  border-top: 1px solid var(--rule);
}

.publication-item,
.timeline-item,
.skills-list > div {
  position: relative;
  padding-left: 13px;
}

.publication-item::before,
.timeline-item::before,
.skills-list > div::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--link);
  content: "";
  opacity: 0.55;
}

.publication-item h3,
.publication-item p,
.timeline-item h3,
.timeline-item p {
  margin: 0;
}

.publication-item h3,
.timeline-item h3 {
  font-size: 0.9rem;
  font-weight: 400;
  line-height: 1.6;
}

.publication-authors,
.publication-meta,
.timeline-item p {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

.publication-authors {
  margin-top: 2px !important;
}

.publication-meta {
  margin-top: 1px !important;
}

.publication-meta em {
  color: var(--foreground);
}

.timeline-list {
  display: grid;
  gap: 8px;
}

.timeline-item {
  display: block;
}

.timeline-item time {
  margin-right: 7px;
  color: var(--subtle);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.1px;
  white-space: nowrap;
}

.timeline-item > div,
.timeline-item h3,
.timeline-item p {
  display: inline;
}

.timeline-item p::before {
  content: " ";
}

.skills-list {
  display: grid;
  gap: 7px;
  margin: 0;
}

.skills-list > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0 7px;
}

.skills-list dt {
  color: var(--foreground);
  font-size: 0.9rem;
  font-weight: 400;
  white-space: nowrap;
}

.skills-list dt::after {
  color: var(--subtle);
  content: ":";
}

.skills-list dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .page-shell {
    width: min(100% - 48px, 700px);
    padding: 26px 0;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 14px;
  }

  .page-shell {
    width: min(100% - 32px, 700px);
    padding: 20px 0;
  }

  .site-header {
    padding-right: 32px;
  }

  .controls {
    top: 3px;
    right: 0;
  }

  h1 {
    font-size: 1.4rem;
  }

  .intro {
    font-size: 0.92rem;
  }

  .publication-item h3,
  .timeline-item h3,
  .skills-list dt {
    font-size: 0.86rem;
  }

  .publication-authors,
  .publication-meta,
  .timeline-item p,
  .skills-list dd {
    font-size: 0.81rem;
  }

  .timeline-item time {
    font-size: 0.74rem;
  }

}

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

  body,
  a,
  .control-button {
    transition: none;
  }
}