:root {
  --bg: #ffffff;
  --fg: #272828;
  --soft: #666a69;
  --faint: #929695;
  --rule: #e5e7e4;
  --header: rgba(255, 255, 255, .94);
  --selection: rgba(0, 203, 212, .18);
  --focus: #3c8cff;
  --blue: #3c8cff;
  --serif: "Iowan Old Style", "Songti SC", "Noto Serif CJK SC", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color-scheme: light dark;
}

:root[data-theme="dark"] {
  --bg: #111513;
  --fg: #eef1ed;
  --soft: #c4cbc7;
  --faint: #939e99;
  --rule: #323a35;
  --header: rgba(17, 21, 19, .94);
  --selection: #5a3a32;
  --focus: #ef8068;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; background: var(--bg); }
body {
  min-height: 100vh;
  color: var(--fg);
  background: var(--bg);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.62;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-underline-offset: 3px; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
::selection { background: var(--selection); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; }
.lang-zh, :root[data-lang="zh"] .lang-en { display: none; }
:root[data-lang="zh"] .lang-zh { display: inline; }
.theme-action-zh, :root[data-lang="zh"] .theme-action-en { display: none; }
:root[data-lang="zh"] .theme-action-zh { display: inline; }

.skip-link {
  position: fixed;
  z-index: 200;
  top: 10px;
  left: 12px;
  transform: translateY(-180%);
  padding: 8px 12px;
  color: #fff;
  background: var(--fg);
  font: 650 13px/1 var(--sans);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(18px, 3vw, 34px);
  background: var(--header);
  backdrop-filter: blur(12px);
}
.small-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font: 650 14px/1 var(--sans);
  letter-spacing: -.02em;
  text-decoration: none;
}
.site-header nav { display: flex; align-items: center; gap: clamp(14px, 2.4vw, 28px); }
.site-header nav a, .site-header nav button {
  border: 0;
  color: var(--soft);
  background: transparent;
  font: 450 14px/1 var(--sans);
  text-decoration: none;
  cursor: pointer;
}
.site-header nav a:hover, .site-header nav button:hover { color: var(--fg); text-decoration: underline; }

.masthead {
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 128px 24px 78px;
  text-align: center;
}
.masthead-mark {
  width: 78px;
  height: 78px;
  margin-bottom: 20px;
  animation: recursive-loop 6.5s cubic-bezier(.65, -.1, .3, 1.12) .4s infinite;
}
/* Each recursive cycle makes four quarter turns, then rests for two seconds
   before beginning again. */
@keyframes recursive-loop {
  0% { transform: rotate(0turn); }
  10%, 20% { transform: rotate(.25turn); }
  30%, 40% { transform: rotate(.5turn); }
  50%, 60% { transform: rotate(.75turn); }
  70%, 100% { transform: rotate(1turn); }
}
.masthead h1 {
  font: 650 clamp(30px, 7.8vw, 88px)/.95 var(--sans);
  letter-spacing: -.065em;
  white-space: nowrap;
}
.masthead p { margin-top: 27px; color: var(--soft); font: 450 15px/1.4 var(--sans); }

main { width: 100%; padding: 0 20px; }
.manifesto { max-width: 680px; margin: 0 auto; }
.manifesto p { margin-bottom: 1.35rem; }
.manifesto .opening { font-size: 18px; line-height: 1.6; }
.manifesto h2 {
  margin: 2.8rem 0 .8rem;
  font: 700 1.28rem/1.35 var(--serif);
  text-align: left;
}
.manifesto strong {
  font-family: var(--sans);
  font-weight: 700;
  letter-spacing: -.015em;
}
.work-section { scroll-margin-top: 70px; }
.work-list { border-top: 1px solid var(--rule); }
.work-list > a,
.work-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 2px;
  border-bottom: 1px solid var(--rule);
}
.work-list > a {
  text-decoration: none;
}
.work-list > a:hover strong { text-decoration: underline; }
.work-list > a > span,
.work-summary { display: flex; flex-direction: column; gap: 3px; }
.work-list strong { font: 700 15px/1.35 var(--sans); }
.work-list small { color: var(--soft); font-size: 14px; line-height: 1.45; }
.work-list b { color: var(--soft); font: 400 20px/1 var(--sans); }
.work-summary {
  flex: 1;
  color: inherit;
  text-decoration: none;
}
.work-tag {
  align-self: flex-start;
  margin-bottom: 3px;
  color: var(--blue);
  font: 700 11px/1 var(--sans);
  letter-spacing: .09em;
  text-transform: uppercase;
}
.work-summary:hover .work-tag { text-decoration: none; }
.work-summary:hover strong { text-decoration: underline; }
.work-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 15px;
}
.work-actions a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--soft);
  font: 600 13px/1 var(--sans);
  text-decoration: none;
}
.work-actions a:hover { color: var(--fg); text-decoration: underline; }
.work-actions b { font-size: 14px; }
.work-action-soon {
  display: inline-flex;
  align-items: center;
  color: var(--faint);
  font: 600 13px/1 var(--sans);
  cursor: default;
}

.closing {
  margin: 3.8rem 0 0;
  padding: 0;
  border: 0;
  text-align: left;
}
.closing p { margin: 0 0 .25rem; font-size: 17px; }

footer {
  max-width: 680px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin: 8rem auto 0;
  padding: 0 20px 28px;
  color: var(--faint);
  font: 450 13px/1 var(--sans);
}
footer a { text-decoration-color: var(--rule); }
footer a:hover { color: var(--fg); }

.legal-page {
  max-width: 680px;
  min-height: calc(100vh - 160px);
  margin: 0 auto;
  padding-top: 132px;
}
.legal-page .eyebrow {
  margin-bottom: 14px;
  color: var(--faint);
  font: 650 12px/1 var(--sans);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.legal-page h1 {
  margin-bottom: 2.4rem;
  font: 650 clamp(30px, 6vw, 52px)/1.05 var(--sans);
  letter-spacing: -.05em;
}
.legal-page h2 {
  margin: 2.4rem 0 .7rem;
  font: 700 1.15rem/1.35 var(--serif);
}
.legal-page p { margin-bottom: 1.25rem; }
.legal-page .back-link {
  display: inline-block;
  margin-top: 2rem;
  color: var(--soft);
  font: 500 14px/1.4 var(--sans);
}

.project-page { max-width: 760px; }
.project-page h1 { margin-bottom: 1rem; }
.project-page .tagline {
  margin-bottom: .5rem;
  font: 650 19px/1.5 var(--sans);
  letter-spacing: -.02em;
}
.project-page .subtitle { color: var(--soft); margin-bottom: 1.4rem; }
.project-page h3 { margin: 2rem 0 .4rem; font: 700 1.02rem/1.35 var(--serif); }
.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 2.8rem;
}
.page-actions a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--soft);
  font: 600 13px/1 var(--sans);
  text-decoration: none;
}
.page-actions a:hover { color: var(--fg); text-decoration: underline; }
.page-actions b { font: 400 14px/1 var(--sans); }
.project-page figure { margin: 1.8rem 0 2rem; }
.project-page figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
}
.project-page figure.framed img { border: 1px solid var(--rule); }
.project-page figcaption {
  margin-top: 10px;
  color: var(--faint);
  font: 450 13px/1.5 var(--sans);
  text-align: center;
}
.project-page .loop-line {
  margin: 1.4rem 0;
  font: 650 15px/1.6 var(--sans);
  letter-spacing: .01em;
  text-align: center;
}
.project-page code {
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--rule);
  font: 500 .82em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.table-scroll { margin: 1.4rem 0 1.8rem; overflow-x: auto; }
.table-scroll table { min-width: 560px; }
.project-page table {
  width: 100%;
  border-collapse: collapse;
  font: 450 14px/1.5 var(--sans);
}
.project-page th {
  padding: 8px 16px 8px 0;
  border-bottom: 1px solid var(--fg);
  color: var(--fg);
  font: 650 13px/1.4 var(--sans);
  text-align: left;
  vertical-align: bottom;
}
.project-page td {
  padding: 9px 16px 9px 0;
  border-bottom: 1px solid var(--rule);
  color: var(--soft);
  vertical-align: top;
}
.project-page td strong { color: var(--fg); }
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 1.6rem 0 1.8rem;
}
.showcase-grid figure { margin: 0; }
.showcase-grid figure img { border: 1px solid var(--rule); }
.showcase-grid figcaption { text-align: left; }
.showcase-grid figcaption strong {
  display: block;
  margin-bottom: 3px;
  color: var(--fg);
  font: 650 13px/1.4 var(--sans);
}
.project-page ol, .project-page ul { margin: 0 0 1.25rem 1.35rem; }
.project-page li { margin-bottom: .45rem; }
.project-page li::marker { color: var(--faint); }

@media (max-width: 640px) {
  .showcase-grid { grid-template-columns: 1fr; }
  body { font-size: 16px; }
  .small-brand span { display: none; }
  .site-header nav { gap: 16px; }
  .site-header nav a:first-child { display: none; }
  .masthead { min-height: 46vh; padding-top: 112px; }
  .masthead-mark { width: 64px; height: 64px; }
  .manifesto .opening { font-size: 17px; }
  .manifesto h2 { margin-top: 2.5rem; }
  .work-item { align-items: flex-start; flex-direction: column; gap: 13px; }
  .legal-page { padding-top: 112px; }
  footer { margin-top: 6rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .masthead-mark { animation: none; }
}