/* Shared tool index and reading surfaces. Home examples use toolbox.css. */
:root {
  color-scheme: light;
  --bg: #f3f6fa;
  --panel: #ffffff;
  --ink: #17273e;
  --muted: #52637a;
  --line: #d9e2ed;
  --accent: #1554c0;
  --tint: #e9f1ff;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Hiragino Sans',
    'Yu Gothic',
    sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-padding-top: 24px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--accent);
  text-underline-offset: 0.22em;
}
button,
input {
  font: inherit;
  color: var(--ink);
}
button {
  cursor: pointer;
}
button:disabled {
  cursor: default;
}
img {
  max-width: 100%;
  height: auto;
}
[hidden] {
  display: none !important;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}
.shell {
  width: min(1100px, calc(100% - 64px));
  margin-inline: auto;
}
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.skip {
  position: absolute;
  left: 20px;
  top: -100px;
  padding: 12px 20px;
  background: var(--panel);
  z-index: 10;
}
.skip:focus {
  top: 12px;
}
.hub-header {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.hub-nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.brand {
  color: var(--ink);
  font-size: 19px;
  font-weight: 750;
  letter-spacing: -0.04em;
  white-space: nowrap;
  text-decoration: none;
}
.brand b {
  display: none;
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  min-width: 0;
  gap: 24px;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}
.nav-links a:hover,
.nav-links a[aria-current] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}
.nav-utilities {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}
.language-choice {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  font-size: 13px;
  color: var(--muted);
}
.language {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 13px;
}
.language[aria-current] {
  color: var(--ink);
  font-weight: 650;
  text-decoration: none;
}
.theme {
  min-height: 44px;
  min-width: 44px;
  background: none;
  border: 0;
  font-size: 21px;
}
.shelf-intro {
  padding-block: 32px 24px;
}
.shelf-intro h1 {
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.4;
  margin: 0 0 12px;
}
.shelf-intro p {
  color: var(--muted);
  margin: 0;
}
.keep {
  display: inline-block;
}
.catalog {
  padding-bottom: 40px;
}
.section-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 20px;
}
.section-top h2 {
  font-size: 22px;
  margin: 0;
}
.section-top p {
  font-size: 15px;
  color: var(--muted);
  margin: 8px 0 0;
}
.section-top > a {
  font-size: 14px;
}
.section-top.compact h2 {
  font-size: 16px;
}
.project-grid {
  display: grid;
  gap: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.project {
  display: grid;
  grid-template-columns: minmax(160px, 240px) minmax(0, 1fr);
  align-items: start;
  gap: 28px;
  padding: 26px;
  min-width: 0;
}
.project + .project {
  border-top: 1px solid var(--line);
}
.catalog .project > .market-entry-branches {
  grid-column: 1 / -1;
  margin: 0;
}
.project[data-no-media] .project-body {
  grid-column: 2;
}
.project-media {
  margin: 0;
  min-width: 0;
}
.project-art {
  display: block;
  background: var(--tint);
  border: 1px solid var(--line);
  border-radius: 5px;
}
.project-art img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}
.project-art.slarog {
  padding: 12px;
}
.project-art.slarog img {
  width: min(120px, 100%);
  margin-inline: auto;
}
.project-media figcaption {
  font-size: 13px;
  color: var(--muted);
  margin-top: 8px;
}
.project-body {
  min-width: 0;
}
.project-meta {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 8px;
}
.project-kind {
  color: var(--ink);
  font-weight: 600;
}
.project h3 {
  overflow-wrap: anywhere;
  font-size: 22px;
  line-height: 1.45;
  margin: 0 0 12px;
}
.project h3 a {
  text-decoration: none;
}
.project h3 a:hover {
  text-decoration: underline;
}
.project-summary {
  margin: 10px 0;
  color: var(--muted);
  font-size: 16px;
  max-width: 48em;
}
.catalog .project-facts {
  margin: 12px 0;
  font-size: 14px;
}
.catalog .project-facts > div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 14px;
  padding-block: 7px;
  border-top: 1px solid var(--line);
}
.catalog .project-facts dt {
  color: var(--muted);
}
.catalog .project-facts dd {
  margin: 0;
  overflow-wrap: anywhere;
}
.project-bottom {
  display: flex;
  align-items: center;
  gap: 4px 20px;
  flex-wrap: wrap;
}
.project-bottom > a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}
.project-launch {
  font-weight: 650;
}
.save {
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel);
  color: var(--accent);
  font-size: 14px;
  padding: 8px 12px;
  min-height: 44px;
  margin-left: auto;
}
.save[aria-pressed='true'] {
  background: var(--tint);
  border-color: var(--accent);
}
.filterbox {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
}
.catalog-options {
  margin-bottom: 20px;
}
.catalog-options summary {
  min-height: 44px;
  padding-block: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--accent);
}
.catalog-options[open] .filterbox {
  margin-top: 10px;
}
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter {
  min-height: 44px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel);
}
.filter[aria-pressed='true'] {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--tint);
}
.search {
  min-height: 44px;
  width: 270px;
  max-width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 5px;
  font-size: 14px;
}
.search::placeholder {
  color: var(--muted);
}
.catalog-foot {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 20px;
  color: var(--muted);
  font-size: 13px;
  margin-top: 16px;
}
.clear {
  border: 0;
  padding: 4px 0;
  min-height: 44px;
  color: var(--accent);
  background: none;
  font-size: 13px;
  text-decoration: underline;
}
.empty {
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--panel);
}
.error,
.noscript {
  border-left: 3px solid var(--accent);
  padding: 15px;
  background: var(--tint);
  font-size: 14px;
}
.recent-guide {
  border-top: 1px solid var(--line);
  padding-block: 20px 28px;
}
.recent-guide > div {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--muted);
}
.recent-guide > a {
  display: inline-block;
  margin-top: 8px;
  padding-block: 4px;
}
.notes {
  padding-bottom: 40px;
}
.note-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 32px;
}
.guide-purposes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}
.guide-purposes a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  gap: 10px;
  font-size: 15px;
}
.guide-group {
  position: relative;
  scroll-margin-top: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
}
.guide-group + .guide-group {
  margin-top: 20px;
}
.guide-group h2 {
  overflow-wrap: anywhere;
  margin: 0;
  font-size: 20px;
}
.guide-alias {
  position: absolute;
  top: 0;
  scroll-margin-top: 24px;
}
.note {
  padding: 20px 0;
  min-width: 0;
  border-bottom: 1px solid var(--line);
}
.note-kind {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 6px;
}
.note h3 {
  font-size: 18px;
  line-height: 1.7;
  margin: 0;
  overflow-wrap: anywhere;
}
.note h3 a {
  text-decoration: none;
}
.note h3 a:hover {
  text-decoration: underline;
}
.note h3 span {
  font-size: 14px;
}
.note p:last-child {
  font-size: 15px;
  color: var(--muted);
  margin: 8px 0 0;
}
.shelf-bottom {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  border-top: 1px solid var(--line);
  padding-block: 30px 40px;
}
.shelf-bottom h2 {
  font-size: 18px;
  margin: 0;
}
.shelf-bottom p {
  color: var(--muted);
  margin: 14px 0;
}
.hub-footer {
  padding-block: 28px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}
.footer-main {
  display: flex;
  justify-content: space-between;
  gap: 32px;
}
.footer-main .brand {
  font-size: 17px;
}
.footer-main p {
  font-size: 13px;
  color: var(--muted);
  margin: 6px 0;
}
.footer-links {
  display: flex;
  align-content: start;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 4px 22px;
  max-width: 580px;
}
.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 13px;
}
.page-intro {
  padding-block: 30px 24px;
  max-width: 820px;
}
.page-intro h1,
.article h1 {
  font-size: clamp(26px, 3vw, 32px);
  line-height: 1.5;
  margin: 12px 0;
  letter-spacing: -0.025em;
}
.page-intro p,
.article .intro {
  font-size: 16px;
  color: var(--muted);
}
.breadcrumb {
  color: var(--muted);
  font-size: 13px;
}
.article {
  max-width: 800px;
  margin: 32px auto 48px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  overflow-wrap: anywhere;
}
.article h2 {
  font-size: 22px;
  line-height: 1.6;
  margin: 32px 0 12px;
}
.article p,
.article li {
  font-size: 16px;
  line-height: 1.95;
}
.article .byline {
  color: var(--muted);
  font-size: 13px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.contents {
  background: var(--tint);
  border-radius: 5px;
  padding: 20px;
  margin-block: 24px;
}
.contents ol {
  margin-bottom: 0;
  padding-left: 22px;
}
.contents a {
  font-size: 15px;
}
.aside {
  border-left: 3px solid var(--accent);
  padding: 15px 20px;
  background: var(--tint);
  margin-top: 28px;
}
.aside p {
  margin: 0;
}
.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 24px;
  font-size: 15px;
}
html[data-theme='dark'] {
  color-scheme: dark;
  --bg: #101b2b;
  --panel: #17263b;
  --ink: #e7edf7;
  --muted: #b3c1d5;
  --line: #34465f;
  --accent: #91baff;
  --tint: #203957;
}
@media (max-width: 800px) {
  .shell {
    width: calc(100% - 40px);
  }
  .hub-nav {
    gap: 20px;
  }
  .project {
    grid-template-columns: minmax(140px, 190px) minmax(0, 1fr);
    gap: 22px;
    padding: 22px;
  }
  .catalog .project-facts > div {
    grid-template-columns: 1fr;
    gap: 3px;
  }
  .catalog .project-facts dt {
    font-weight: 600;
  }
}
@media (max-width: 600px) {
  .shell {
    width: calc(100% - 32px);
  }
  .hub-nav {
    flex-wrap: wrap;
    gap: 0 16px;
    padding-block: 10px 4px;
  }
  .brand {
    font-size: 18px;
  }
  .nav-utilities {
    gap: 2px;
  }
  .language-choice {
    gap: 6px;
  }
  .nav-links {
    order: 3;
    width: 100%;
    gap: 24px;
  }
  .nav-links a {
    font-size: 14px;
  }
  .project {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 20px;
  }
  .project[data-no-media] .project-body {
    grid-column: auto;
  }
  .project-media {
    max-width: 280px;
  }
  .project h3 {
    font-size: 21px;
  }
  .catalog .project-facts > div {
    grid-template-columns: 1fr;
  }
  .save {
    margin-left: 0;
  }
  .filterbox {
    align-items: stretch;
  }
  .filterbox > div,
  .search {
    width: 100%;
  }
  .note-grid,
  .shelf-bottom {
    grid-template-columns: 1fr;
  }
  .guide-group {
    padding: 20px;
  }
  .guide-purposes {
    gap: 0 18px;
  }
  .section-top {
    flex-wrap: wrap;
    gap: 10px;
  }
  .footer-main {
    display: block;
  }
  .footer-links {
    justify-content: flex-start;
    margin-top: 16px;
    gap: 0 20px;
  }
  .article {
    padding: 20px;
    margin-block: 24px 32px;
  }
  .page-intro {
    padding-block: 24px 20px;
  }
}
@media (max-width: 359px) {
  .hub-nav {
    column-gap: 6px;
  }
  .brand {
    font-size: 16px;
  }
  .language-choice {
    gap: 4px;
  }
  .theme {
    min-width: 36px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}
.guide-practice {
  margin-block: 2rem;
}
.guide-practice .practice-byline {
  font-size: 0.9rem;
}
.guide-practice dt {
  font-weight: 700;
}
.guide-practice dd {
  margin: 0.4rem 0 1rem;
}
.guide-practice li {
  margin-block: 0.7rem;
}
.guide-practice .practice-table {
  max-width: 100%;
  overflow-x: auto;
}
.guide-practice table {
  width: 100%;
  border-collapse: collapse;
}
.guide-practice caption {
  text-align: start;
  font-weight: 700;
  margin-block: 0.5rem;
}
.guide-practice th,
.guide-practice td {
  padding: 0.5rem;
  border-bottom: 1px solid currentColor;
  text-align: start;
}
.guide-practice td {
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.frameclear-comparison {
  margin: 36px 0;
  padding-block: 28px;
  border-block: 1px solid var(--line, #d8dfdb);
}
.comparison-frames {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.comparison-frames figure {
  min-width: 0;
  margin: 0;
}
.comparison-frames img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  border-radius: 4px;
}
.comparison-frames figcaption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
}
.comparison-controls[hidden],
#comparison.comparison-enhanced .comparison-frames figure[hidden] {
  display: none;
}
.comparison-controls p {
  margin-block: 12px;
}
.comparison-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.comparison-buttons button,
.comparison-controls select {
  min-height: 44px;
  max-width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--line, #d8dfdb);
  border-radius: 6px;
  background: var(--panel, #fff);
  color: inherit;
  font: inherit;
}
.comparison-buttons button {
  cursor: pointer;
}
.comparison-buttons button[aria-pressed='true'] {
  border-color: currentColor;
  font-weight: 700;
  box-shadow: inset 0 -3px currentColor;
}
.comparison-buttons button:focus-visible,
.comparison-controls select:focus-visible {
  outline: 3px solid currentColor;
  outline-offset: 3px;
}
.comparison-controls label {
  display: block;
  margin-bottom: 6px;
}
.comparison-zoom-note {
  font-weight: 700;
}
#comparison.comparison-enhanced .comparison-frames {
  grid-template-columns: minmax(0, 1fr);
}
#comparison.comparison-enhanced .comparison-frames figure {
  max-width: none;
}
#comparison.comparison-enhanced .comparison-viewport {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: 4px;
  aspect-ratio: 3 / 2;
}
#comparison.comparison-enhanced[data-comparison-region='background'] .comparison-viewport {
  max-width: 480px;
  aspect-ratio: 1;
}
#comparison.comparison-enhanced[data-comparison-region='feathers'] .comparison-viewport {
  max-width: 280px;
  aspect-ratio: 140 / 205;
}
/* Both variants use the same crop coordinates in the original 480×320 PNG. */
#comparison.comparison-enhanced[data-comparison-region='background'] .comparison-viewport img {
  position: absolute;
  width: 300%;
  max-width: none;
  left: 0;
  top: -37.5%;
}
#comparison.comparison-enhanced[data-comparison-region='feathers'] .comparison-viewport img {
  position: absolute;
  width: 342.857142857%;
  max-width: none;
  left: -121.428571429%;
  top: -24.390243902%;
}
.comparison-downloads a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  overflow-wrap: anywhere;
}
.comparison-downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-left: 0;
  list-style: none;
}
.comparison-settings summary,
.guide-practice summary {
  min-height: 44px;
  padding-block: 10px;
  cursor: pointer;
}
@media (max-width: 640px) {
  .comparison-frames {
    grid-template-columns: 1fr;
  }
  .comparison-frames figure {
    max-width: 480px;
  }
}