/* Responsive refinements. Keep this stylesheet after the base site styles. */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 92px;
}

body { overflow-wrap: break-word; }
main, section, article, aside, .wrap { min-width: 0; }
.feature > *, .paper-layout > *, .paper-row > *, .start-layout > *,
.approach-hero > *, .principle-row > *, .overview-box > * { min-width: 0; }
img, video, picture { max-width: 100%; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

.search input, .sort {
  font-size: 16px;
  min-height: 50px;
  height: 50px;
}
.search { min-width: 0; }
.search input { padding-right: 14px; }
.sort { max-width: none; }
.button { min-height: 50px; font-size: 14px; }
.menu-toggle { min-width: 88px; min-height: 44px; font-size: 13px; }
.filter { min-height: 44px; min-width: 44px; font-size: 12px; padding: 10px 15px; }
.filter-row { gap: 10px; }
.nav a { display: inline-flex; align-items: center; min-height: 44px; }
.text-link, .thread-item a, .citation-actions button, .footer-links a,
.footer-bottom a, .breadcrumb {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  max-width: 100%;
  overflow-wrap: anywhere;
}
.text-link { gap: 12px; padding-block: 8px; font-size: 14px; }
.thread-item a, .citation-actions button, .footer-links a { font-size: 14px; }
.results-meta button { min-width: 44px; min-height: 44px; padding: 8px 0; font-size: 13px; }
.feature .read-link { min-height: 48px; align-items: center; font-size: 14px; padding-top: 14px; }
.support-code summary { min-height: 44px; align-items: center; gap: 16px; font-size: 16px; }
.side-card .button { font-size: 14px; }
.support-code .text-link, .paper-aside .text-link { font-size: 14px; }

.section-head > p, .feature p, .start-layout p, .thread-item p,
.library-intro p, .paper-row p, .overview-box p, .article-block p,
.article-block li, .side-card p, .approach-hero p, .principle-row p,
.changes ul, .contact-inner p, .footer p, .notice {
  font-size: 15px;
  line-height: 1.8;
}
.feature .status, .row-status { font-size: 14px; line-height: 1.65; }
.side-card .small-note, .caption { font-size: 13px; line-height: 1.75; }
.paper-tag { font-size: 11px; line-height: 1.65; letter-spacing: .1em; }
.paper-meta, .paper-date, .paper-version, .results-meta { font-size: 12px; }
.citation-text { font-size: 14px; line-height: 1.85; }
.citation-feedback { font-size: 13px; }
.source-table { font-size: 14px; }
.footer-bottom { font-size: 12px; align-items: center; }
.footer-bottom a { min-height: 44px; }
.video-link { min-height: 54px; font-size: 15px; }

/* Without JavaScript, the navigation stays available as ordinary links. */
html:not(.js) .menu-toggle { display: none; }

@media (min-width: 761px) and (max-width: 1100px) {
  .header-inner { gap: 22px; }
  .nav { gap: 14px; }
  .nav .nav-out { margin-left: 0; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
  .feature { min-width: 0; }
  .feature-body { padding: 25px; }
  .feature h3 { font-size: clamp(29px, 3.5vw, 36px); }
  .feature:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  }
  .feature:last-child:nth-child(odd) .feature-image { height: 100%; min-height: 320px; }
  .start-layout { gap: 36px; }
  .overview-box { grid-template-columns: 1fr 1.6fr; gap: 25px; }
  .overview-box > .text-link { grid-column: 2; justify-self: start; }
  .paper-layout { grid-template-columns: minmax(0, 1fr) 260px; gap: 30px; }
  .side-card { padding: 20px; }
  .paper-row { grid-template-columns: 30px minmax(0, 1fr) 145px; gap: 18px; }
  .paper-row h2 { font-size: 30px; }
  .principle-row { grid-template-columns: 28px minmax(190px, .8fr) minmax(0, 1fr); }
}

@media (max-width: 760px) {
  :root { --mobile-gutter: clamp(18px, 5vw, 30px); }
  html { scroll-padding-top: 24px; }
  .wrap {
    width: auto;
    margin-left: max(var(--mobile-gutter), env(safe-area-inset-left, 0px));
    margin-right: max(var(--mobile-gutter), env(safe-area-inset-right, 0px));
  }
  .header { height: 72px; }
  .header-inner { gap: 15px; }
  .wordmark { font-size: 28px; }
  .menu-toggle { border-radius: 3px; }
  .nav {
    top: 72px;
    padding: 14px max(var(--mobile-gutter), env(safe-area-inset-right, 0px)) 20px max(var(--mobile-gutter), env(safe-area-inset-left, 0px));
    box-shadow: 0 20px 35px #0004;
    max-height: calc(100svh - 72px);
    overflow-y: auto;
    overscroll-behavior: contain;
    font-size: 16px;
  }
  .nav a { min-height: 50px; padding: 12px 8px; }
  .nav .nav-out { margin: 6px 8px 0; padding: 12px 0; }
  html:not(.js) .header { height: auto; }
  html:not(.js) .header-inner { flex-wrap: wrap; padding-top: 14px; }
  html:not(.js) .nav {
    display: flex;
    position: static;
    flex-basis: 100%;
    max-height: none;
    padding: 0 0 16px;
    background: transparent;
    border: 0;
    box-shadow: none;
  }

  .hero { min-height: 0; align-items: flex-start; isolation: isolate; }
  .hero .hero-media { inset: 0; width: 100%; height: clamp(320px, 90vw, 430px); }
  .hero .hero-image, .hero .hero-video {
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 50% 50%;
  }
  .hero .hero-image { opacity: .85; }
  .hero::after {
    background: linear-gradient(180deg, #080e1808 0%, #080e183d 17%, #080e18c9 39%, #080e18f5 72%, var(--bg) 100%), linear-gradient(90deg, #080e1840, transparent 75%);
  }
  .hero-content { padding-top: clamp(160px, 46vw, 220px); padding-bottom: 100px; }
  .hero .eyebrow { font-size: 10px; letter-spacing: .15em; margin-bottom: 20px; }
  .kicker { gap: 10px; }
  .kicker::before { width: 20px; flex: 0 0 20px; }
  .hero h1 { font-size: clamp(52px, 16vw, 76px); line-height: .98; margin-bottom: 24px; max-width: 600px; }
  .hero p { font-size: 16px; line-height: 1.75; max-width: 440px; margin-bottom: 24px; }
  .hero .actions { gap: 12px 22px; align-items: flex-start; }
  .hero .actions .button { min-height: 52px; padding-inline: 22px; }
  .hero .actions .text-link { font-size: 14px; }
  .hero .hero-controls {
    margin-inline: 0;
    left: max(var(--mobile-gutter), env(safe-area-inset-left, 0px));
    right: max(var(--mobile-gutter), env(safe-area-inset-right, 0px));
    bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .hero .motion-toggle { flex: 0 0 auto; min-height: 44px; min-width: 44px; }
  .hero .motion-label { max-width: 220px; font-size: 11px; line-height: 1.5; }
  .hero .hero-orbits { pointer-events: none; }

  .section { padding-block: clamp(52px, 12vw, 76px); }
  .section-head { gap: 20px; margin-bottom: 30px; }
  .section h2 { font-size: clamp(34px, 9.5vw, 46px); line-height: 1.08; }
  .section-head > p { max-width: 520px; }
  .eyebrow { font-size: 11px; letter-spacing: .15em; }
  .index-inner { gap: 14px; padding-block: 23px; }
  .index-label { font-size: 11px; }
  .index-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; width: 100%; }
  .index-stats span { font-size: 12px; line-height: 1.55; }
  .index-stats b { display: block; font-size: 29px; line-height: 1.2; margin: 0 0 5px; }
  .index-inner > .text-link { font-size: 13px; }

  .feature-grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .feature { display: flex; flex-direction: column; }
  .feature > picture { display: block; width: 100%; }
  .feature-image { height: auto; width: 100%; min-height: 0; aspect-ratio: 16 / 10; object-fit: cover; }
  .feature-body { padding: clamp(23px, 6vw, 32px); }
  .feature h3 { font-size: clamp(31px, 8.4vw, 40px); line-height: 1.08; }
  .feature p { margin-bottom: 22px; }
  .feature .status { padding-top: 20px; font-size: 15px; }
  .feature .read-link { margin-top: 8px; min-height: 48px; padding-top: 8px; }
  .start-layout { gap: 36px; }
  .thread-item { grid-template-columns: 24px minmax(0, 1fr); gap: 15px; padding-block: 25px; }
  .thread-item h3 { font-size: 31px; }
  .thread-item::before { font-size: 12px; }

  .library-intro { padding: 40px 0 32px; }
  .library-intro h1 { font-size: clamp(48px, 13vw, 70px); }
  .library-controls { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; padding-block: 24px 20px; }
  .library-controls > label { min-width: 0; width: 100%; }
  .search, .sort { width: 100%; max-width: none; }
  .search input { padding-left: 42px; font-size: 16px; }
  .sort { font-size: 16px; padding-inline: 14px; }
  .filter { font-size: 12px; padding: 10px 14px; }
  .filter-row { gap: 9px; padding-bottom: 24px; }
  .results-meta { flex-wrap: wrap; align-items: center; justify-content: flex-start; gap: 8px 20px; padding-block: 15px; font-size: 12px; }
  .results-meta > span:last-child { flex-basis: 100%; }
  .paper-row { grid-template-columns: 24px minmax(0, 1fr); gap: 14px; padding-block: 28px; }
  .paper-row h2 { font-size: clamp(28px, 7.8vw, 36px); line-height: 1.13; }
  .paper-row h2 a { display: inline-block; min-height: 44px; }
  .paper-number { font-size: 23px; }
  .paper-aside { gap: 10px 18px; justify-content: flex-start; }
  .paper-aside .text-link { margin-left: 0; font-size: 14px; }
  .paper-version, .paper-date { margin: 0; font-size: 12px; }
  .row-status { font-size: 15px; }
  .overview-box { padding: 25px; gap: 20px; }
  .overview-box h3 { font-size: 34px; }
  .overview-box > .text-link { justify-self: start; }

  .page-title { padding-block: 30px 36px; }
  .breadcrumb { font-size: 14px; margin-bottom: 20px; }
  .page-title h1 { font-size: clamp(36px, 10vw, 54px); line-height: 1.06; }
  .page-title .subtitle { font-size: clamp(25px, 6.8vw, 31px); line-height: 1.3; }
  .paper-meta { font-size: 13px; gap: 9px 20px; }
  .paper-layout { padding: 36px 0 60px; gap: 28px; }
  .article-block { margin-bottom: 36px; }
  .article-block h2 { font-size: clamp(30px, 8.2vw, 38px); margin-bottom: 18px; }
  .article-block p { font-size: 16px; line-height: 1.85; }
  .article-block li { font-size: 15px; line-height: 1.85; }
  .status-box { padding: 20px; margin-bottom: 30px; }
  .status-box p { font-size: 16px; }
  .side-card { padding: 25px; }
  .side-card h2 { font-size: 12px; line-height: 1.5; }
  .side-card p { font-size: 15px; }
  .side-card .small-note { font-size: 14px; }
  .citation-text { padding: 18px; font-size: 14px; }
  .citation-actions { gap: 10px 22px; }
  .source-table { font-size: 14px; }
  .source-table th { width: 40%; padding-right: 15px; }

  .approach-hero { gap: 30px; }
  .approach-hero h1 { font-size: clamp(44px, 12vw, 64px); line-height: 1.04; }
  .approach-image { max-height: none; aspect-ratio: 4 / 3; }
  .principle-row { grid-template-columns: 24px minmax(0, 1fr); gap: 14px; }
  .principle-row h3 { font-size: 31px; }
  .principle-row p { font-size: 15px; }
  .changes { padding: 24px; }
  .contact-strip { padding-block: 48px; }
  .contact-inner h2 { font-size: clamp(34px, 9.5vw, 46px); }
  .contact-inner .actions { gap: 12px 24px; }
  .footer { padding-bottom: max(24px, env(safe-area-inset-bottom, 0px)); }
  .footer-top { gap: 25px; }
  .footer-links { gap: 6px 20px; font-size: 14px; }
  .footer-bottom { align-items: flex-start; gap: 10px; padding-top: 22px; margin-top: 22px; font-size: 12px; }
  .support-code { padding: 14px 20px; }
}

@media (max-width: 760px) and (max-height: 700px) {
  .hero .hero-media { height: 100%; }
  .hero-content { padding-top: 36px; padding-bottom: 88px; }
  .hero h1 { font-size: clamp(46px, 14vw, 64px); margin-bottom: 18px; }
  .hero p { font-size: 15px; line-height: 1.65; margin-bottom: 18px; }
  .hero .eyebrow { margin-bottom: 16px; }
  .hero .hero-controls { bottom: 20px; }
}

@media (max-width: 440px) {
  .hero .actions { flex-direction: column; gap: 8px; }
  .hero .actions .button { min-width: 214px; }
  .paper-aside .text-link { flex-basis: auto; }
  .index-stats { gap: 12px; }
}

@media (hover: none) {
  .button:hover, .feature:hover { transform: none; }
}

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