/* Reading preferences. Loaded after the site's editorial stylesheet. */
:root {
  --reading-scale: 1;
  --reading-heading-scale: 1;
  --hero-summary-size: 20px;
  --hero-intro-size: 13px;
  --feature-title-size: 23px;
  --second-feature-title-size: 21px;
  --feature-excerpt-size: 12px;
  --second-feature-excerpt-size: 12px;
  --row-title-size: 16px;
  --row-subtitle-size: 10px;
  --section-heading-size: 29px;
  --about-copy-size: 14px;
  --about-muted-size: 12px;
  --article-heading-size: clamp(32px, 4vw, 57px);
  --article-body-size: 18px;
  --article-lede-size: 20px;
  --article-section-size: 25px;
  --article-quote-size: 21px;
  --article-code-size: 13px;
}

html[data-font-size="small"] {
  --reading-scale: .9;
  --reading-heading-scale: .95;
}

html[data-font-size="default"] {
  --reading-scale: 1;
  --reading-heading-scale: 1;
}

html[data-font-size="large"] {
  --reading-scale: 1.2;
  --reading-heading-scale: 1.1;
}

.hero-chinese { font-size: calc(var(--hero-summary-size) * var(--reading-scale)); }
.hero-intro { font-size: calc(var(--hero-intro-size) * var(--reading-scale)); }
.feature-title { font-size: calc(var(--feature-title-size) * var(--reading-scale)); }
.feature-card:nth-child(2) .feature-title { font-size: calc(var(--second-feature-title-size) * var(--reading-scale)); }
.feature-excerpt { font-size: calc(var(--feature-excerpt-size) * var(--reading-scale)); }
.feature-card:nth-child(2) .feature-excerpt { font-size: calc(var(--second-feature-excerpt-size) * var(--reading-scale)); }
.row-title { font-size: calc(var(--row-title-size) * var(--reading-scale)); }
.row-subtitle { font-size: calc(var(--row-subtitle-size) * var(--reading-scale)); }
.section-heading h2 { font-size: calc(var(--section-heading-size) * var(--reading-heading-scale)); }
.about-right p { font-size: calc(var(--about-copy-size) * var(--reading-scale)); }
.about-right p + p { font-size: calc(var(--about-muted-size) * var(--reading-scale)); }
.article-heading h1 { font-size: calc(var(--article-heading-size) * var(--reading-heading-scale)); }
.article-lede { font-size: calc(var(--article-lede-size) * var(--reading-scale)); }
.article-prose p,
.article-prose ul { font-size: calc(var(--article-body-size) * var(--reading-scale)); }
.article-prose h2 { font-size: calc(var(--article-section-size) * var(--reading-heading-scale)); }
.article-prose blockquote { font-size: calc(var(--article-quote-size) * var(--reading-scale)); }
.article-prose pre { font-size: calc(var(--article-code-size) * var(--reading-scale)); }

.hero-copy h1 { white-space: normal; text-wrap: balance; }
.hero-copy h1:lang(zh) {
  font-family: var(--sans);
  font-size: clamp(58px, 5.5vw, 88px);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: -.06em;
}
.hero-copy h1:lang(zh) em { font-style: normal; letter-spacing: inherit; }
.hero-copy,
.about-left,
.about-right,
.lab-intro { min-width: 0; }
.section-heading h2,
.feature-title,
.row-title,
.article-heading h1,
.article-prose h2 { overflow-wrap: break-word; }
.row-subtitle,
.feature-excerpt,
.hero-intro,
.about-right p { overflow-wrap: anywhere; }

.preferences-open { flex-shrink: 0; }
.preferences-open:hover { color: var(--accent-text); }
.preferences-dialog {
  width: min(480px, calc(100% - 32px));
  max-height: calc(100vh - 32px);
  max-height: calc(100dvh - 32px);
  overflow-y: auto;
  overscroll-behavior: contain;
  border-radius: 6px;
}
.preferences-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
}
.preferences-heading h2 {
  font-size: 20px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: -.3px;
}
.preferences-heading .dialog-close { flex-shrink: 0; }
.preferences-section {
  min-width: 0;
  margin: 24px;
  padding: 0;
  border: 0;
}
.preferences-section legend {
  padding: 0;
  margin-bottom: 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  letter-spacing: .02em;
}
.setting-options { display: flex; gap: 8px; }
.setting-options button {
  flex: 1 1 0;
  min-width: 0;
  min-height: 48px;
  padding: 11px 8px;
  border: 1px solid var(--line);
  border-radius: 3px;
  font-size: 14px;
  line-height: 1.5;
  background: var(--paper);
  transition: background .2s, border-color .2s, color .2s;
  overflow-wrap: break-word;
}
.setting-options button:hover { border-color: var(--accent-text); }
.setting-options button[aria-pressed="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}
.setting-options button[data-font-size="small"] { font-size: 12px; }
.setting-options button[data-font-size="large"] { font-size: 17px; }
.preferences-preview {
  margin: 0 24px 24px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 3px;
  font-size: calc(17px * var(--reading-scale));
  line-height: 1.9;
  background: var(--card);
  overflow-wrap: break-word;
}
.preferences-hint {
  padding: 16px 24px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  line-height: 1.8;
  color: var(--muted);
}
.preferences-hint p { margin: 0; }

@media (min-width: 1600px) {
  :root { --hero-intro-size: 14px; }
}

@media (max-width: 1100px) {
  :root {
    --hero-summary-size: 17px;
    --feature-title-size: 21px;
    --section-heading-size: 26px;
  }
  .site-header { gap: 24px; }
  .main-nav { gap: 18px; margin-right: 8px; }
  .header-actions { gap: 6px; }
}

@media (max-width: 760px) {
  :root {
    --hero-summary-size: 18px;
    --hero-intro-size: 12px;
    --second-feature-title-size: 17px;
    --feature-excerpt-size: 11px;
    --second-feature-excerpt-size: 10px;
    --row-title-size: 14px;
    --row-subtitle-size: 9px;
    --section-heading-size: 23px;
    --about-copy-size: 13px;
    --article-heading-size: 31px;
    --article-body-size: 17px;
    --article-lede-size: 18px;
    --article-section-size: 22px;
    --article-quote-size: 19px;
    --article-code-size: 11px;
  }
  .site-header { gap: 10px; }
  .hero-copy h1:lang(zh) { font-size: clamp(48px, 10.5vw, 76px); }
  .main-nav { gap: 14px; margin-right: 0; }
  .main-nav a { font-size: 12px; }
  .main-nav a span { display: none; }
  .header-actions { gap: 0; flex-shrink: 0; }
  .header-actions .icon-button { width: 44px; min-width: 44px; min-height: 44px; }
  .header-actions .theme-toggle { padding: 0; border: 0; }
  .search-open kbd { display: none; }
  .preferences-heading { padding: 14px 20px; }
  .preferences-heading h2 { font-size: 18px; }
  .preferences-section { margin: 22px 20px; }
  .preferences-preview { margin-inline: 20px; padding: 16px; }
  .preferences-hint { padding-inline: 20px; }
  .article-info { flex-wrap: wrap; }
  .article-info-left { flex-wrap: wrap; }
  .article-actions { margin-left: auto; }
}

@media (max-width: 540px) {
  .site-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    height: auto;
    min-height: 104px;
    gap: 0 12px;
    padding-block: 6px;
  }
  .brand { grid-column: 1; grid-row: 1; width: max-content; min-height: 44px; }
  .header-actions { grid-column: 2; grid-row: 1; justify-self: end; }
  .main-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: center;
    gap: 32px;
    margin: 0;
  }
  .main-nav a { min-width: 44px; min-height: 44px; justify-content: center; }
  .archive-bar { flex-wrap: wrap; gap: 8px 12px; }
  .filters { flex-wrap: wrap; }
  .feature-card:nth-child(2) {
    grid-template-columns: minmax(100px, 36%) minmax(0, 1fr);
  }
  html[data-font-size="large"] .feature-card:nth-child(2) {
    grid-template-columns: 1fr;
    gap: 0;
  }
  html[data-font-size="large"] .feature-card:nth-child(2) > a:first-child { grid-row: auto; }
  html[data-font-size="large"] .feature-card:nth-child(2) .article-art { height: 220px; }
  html[data-font-size="large"] .feature-card:nth-child(2) .feature-meta { margin-top: 14px; }
  html[data-font-size="large"] .feature-card:nth-child(2) .bookmark { bottom: -10px; }
}
/* Preserve the compact scroll caption when its words become a translated span. */
.hero-bottom a > [data-i18n]{font-size:inherit;color:inherit}
.filters button > [data-i18n]{font-size:inherit;opacity:1;margin-left:0}
@media(max-width:760px){.lab-intro h3 br:after{content:' '}.lab-intro h3 br{display:initial}}