@font-face {
  font-family: "Clear Han Serif";
  src: url("/fonts/clearhanserif.subset.v1.10.standard.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  color-scheme: light;
  --paper: #f3efe7;
  --ink: #1d211d;
  --muted: #70736c;
  --line: #cbc6ba;
  --accent: #285b43;
  --signal: #d56b37;
  --site-font: "Clear Han Serif", "Songti SC", STSong, SimSun, serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 18rem;
  background: var(--paper);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image: url("/images/site-background.png");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
  font-family: var(--site-font);
  font-size: 1rem;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-thickness: 0.06em;
  text-underline-offset: 0.22em;
}

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

a:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.folio {
  width: min(calc(100% - 3rem), 70rem);
  margin-inline: auto;
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.project-header {
  padding-block: 2rem clamp(2.5rem, 4vw, 3.5rem);
  border-bottom: 1px solid var(--ink);
}

.back-link {
  display: inline-block;
  margin-bottom: clamp(3.5rem, 6vw, 5rem);
  font-size: 0.76rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-decoration-color: var(--line);
}

.kicker {
  margin: 0;
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  line-height: 1.5;
  text-transform: uppercase;
}

h1,
h2 {
  color: var(--ink);
  font-weight: 400;
}

h1 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.875rem, 3vw, 2.5rem);
  line-height: 1.2;
}

.introduction {
  max-width: 46rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.1rem);
}

.lineage-index {
  padding-block: clamp(3rem, 6vw, 4.5rem);
}

.section-heading {
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

h2 {
  margin: 0.3rem 0 0;
  font-size: clamp(1.375rem, 2vw, 1.75rem);
  line-height: 1.35;
}

.entry-list {
  border-top: 1px solid var(--line);
}

.lineage-entry {
  display: block;
  padding: 1.5rem 0 1.7rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.entry-label {
  display: block;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

.entry-title {
  display: block;
  margin-top: 0.3rem;
  font-size: clamp(1.1rem, 1.7vw, 1.25rem);
  font-weight: 400;
  line-height: 1.5;
}

.entry-arrow {
  margin-left: 0.2rem;
  color: var(--accent);
  font-size: 0.85em;
}

.entry-description {
  display: block;
  max-width: 43rem;
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

footer {
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  border-top: 1px solid var(--ink);
  font-size: 0.72rem;
}

footer a {
  text-decoration-color: var(--line);
}

@media (max-width: 42rem) {
  .folio {
    width: min(calc(100% - 2.25rem), 70rem);
  }

  .back-link {
    margin-bottom: 3rem;
  }

  footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}