/* Perfect Final website theme. Color authority: ui/color_tokens.py and
   docs/guides/COLOR_SYSTEM_RULES.md in the desktop application.
   Keep these semantic variables independent of the desktop bridge. */
:root {
  color-scheme: dark;
  --ink: #D7DBE0;
  --title: #F1F3F5;
  --muted: #A8AFB8;
  --subtle: #7C848F;
  --line: #3A3F46;
  --line-subtle: #2D3136;
  --line-hover: #4A5058;
  --bg: #181A1D;
  --sidebar: #1C1F22;
  --card: #202327;
  --raised: #262A2E;
  --input: #181B1E;
  --media: #0E0F11;
  --accent: #6793FF;
  --accent-soft: #243149;
  --accent-fill: #4C7DFF;
  --accent-fill-hover: #6793FF;
  --accent-pressed: #365FCF;
  --focus: #6E96FF;
  --on-accent: #FFFFFF;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  font-size: 14px;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg);
}

a { color: inherit; text-decoration: none; }

button, input, textarea {
  font-family: inherit;
  font-size: 14px;
  line-height: 1.5;
  color: inherit;
}

input, textarea { background: var(--input); caret-color: var(--accent); }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: 1; }
::selection { color: var(--on-accent); background: var(--accent-soft); }

:where(a, button, input, textarea):focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.bar {
  position: relative;
  z-index: 10;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: var(--sidebar);
}

.brand { font-weight: 700; letter-spacing: -.02em; white-space: nowrap; padding-right: 28px; border-right: 1px solid var(--line); }

#nav { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 0; }

#nav button, #nav summary, .quiet {
  border: 0;
  background: transparent;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  color: inherit;
}

#nav button:hover, #nav summary:hover, .quiet:hover { background: var(--raised); color: var(--ink); }
#nav button, #nav summary { position: relative; white-space: nowrap; color: var(--muted); }
#nav > button, #nav .nav-category, #nav summary { display: flex; align-items: center; gap: 8px; }
#nav [aria-current="page"] { color: var(--accent); }
#nav [aria-current="page"]::after { content: ""; position: absolute; bottom: -10px; left: 10px; right: 10px; height: 2px; background: var(--accent); border-radius: 2px; }
.nav-group { position: relative; flex-shrink: 0; display: flex; align-items: stretch; }
#nav summary { list-style: none; font-size: 14px; cursor: pointer; }
#nav summary::-webkit-details-marker { display: none; }
#nav summary:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.nav-count { background: var(--raised); color: var(--muted); padding: 1px 6px; border-radius: 5px; font-size: 11px; font-variant-numeric: tabular-nums; }
.nav-chevron { width: 6px; height: 6px; margin-left: 2px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: rotate(45deg); }
.nav-models[open] .nav-chevron { transform: rotate(225deg); }
.model-menu { position: absolute; top: calc(100% + 14px); left: 0; width: 280px; padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); box-shadow: 0 16px 40px rgba(0, 0, 0, .3); }
.model-menu-label { display: flex; justify-content: space-between; padding: 6px 10px 10px; color: var(--muted); font-size: 12px; }
#nav .model-menu button { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 11px 10px; font-size: 14px; }
#nav .model-menu button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); }
.model-count { font-size: 12px; font-variant-numeric: tabular-nums; color: var(--muted); }

.quiet { color: var(--muted); font-size: 14px; }

.collection-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.collection-title { display: flex; align-items: baseline; flex-wrap: wrap; gap: 12px; margin: 0; font-size: 18px; font-weight: 600; }
.result-count { color: var(--muted); font-size: 13px; font-weight: 400; font-variant-numeric: tabular-nums; }

.search-card {
  width: min(480px, 100%);
  margin: 0;
  color: var(--ink);
  flex-shrink: 0;
}

.card, .copy, .back {
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
}

.search-line { display: flex; gap: 8px; }

.search-line input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 14px;
  min-height: 44px;
}

.search-line button { flex-shrink: 0; }

.search-line button, .copy {
  border: 0;
  background: var(--accent-fill);
  color: var(--on-accent);
  border-radius: 6px;
  padding: 14px 22px;
  font-size: 14px;
}

.search-line button:hover, .copy:hover { background: var(--accent-fill-hover); }
.search-line button { padding: 10px 18px; font-size: 14px; cursor: pointer; }

.wrap { padding: 20px 24px 32px; }

.grid { display: grid; gap: 12px; }

.card {
  text-align: left;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.card strong { display: block; margin-bottom: 6px; }
.card span, .muted { color: var(--muted); font-size: 13px; }

.grid {
  display: block;
  column-count: 6;
  column-gap: 12px;
}

.card {
  position: relative;
  display: inline-block;
  width: 100%;
  margin: 0 0 14px;
  padding: 0;
  overflow: hidden;
  break-inside: avoid;
  vertical-align: top;
  transition: border-color .12s ease, background-color .12s ease;
}

.card:hover {
  z-index: 2;
  border-color: var(--line-hover);
  box-shadow: none;
}

.cover { position: relative; overflow: hidden; }

.card:hover .meta strong { color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
}

.cover, .hero-cover {
  background: var(--input);
}

.cover { min-height: 160px; }
.cover.ready { min-height: 0; }

.cover img,
.cover video {
  width: 100%;
  height: auto;
  display: block;
}

.cover video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--input);
  opacity: 0;
  pointer-events: none;
}

.card.preview-playing .cover video { opacity: 1; }

.masonry {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  overflow: visible;
}

.masonry-col {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.masonry-col .card { margin: 0; }

.cover.has-ratio { aspect-ratio: var(--ar); min-height: 0; }

.cover.has-ratio .study-still {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pager {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 22px;
}

.pager button, .page-jump button {
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink);
}

.pager button[aria-current="page"] {
  background: var(--accent-fill);
  border-color: var(--line-hover);
  color: var(--on-accent);
}

.pager button:not([disabled]):hover, .page-jump button:hover { background: var(--accent-soft); border-color: var(--line-hover); }

.pager button[disabled] { opacity: .35; }

.pager .gap { color: var(--muted); padding: 0 2px; }

.page-jump { display: flex; gap: 6px; margin-left: 8px; }

.page-jump input {
  width: 72px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
}

.hero-cover {
  width: 100%;
  height: auto;
  display: block;
}

.hero-cover {
  height: auto;
  max-height: 420px;
  border-radius: 8px;
  margin-bottom: 14px;
}

.ph.swatch {
  background: var(--raised);
  color: var(--ink);
  font-weight: 650;
}

.ph {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  font-size: 28px;
  color: var(--muted);
}

.meta { padding: 12px; }

.meta strong { font-size: 14px; line-height: 1.45; font-weight: 650; }

.tagline { display: block; margin-top: 6px; }

.tagline em {
  display: inline-block;
  margin: 0 6px 0 0;
  font-style: normal;
  font-size: 12px;
  color: var(--accent);
}

.section-title { display: flex; align-items: center; gap: 16px; margin: 0 0 18px; font-size: 18px; font-weight: 600; }
.section-title::after { content: ""; height: 1px; flex: 1; background: var(--line); opacity: .6; }

.detail { max-width: 860px; }

body.lightbox-open { overflow: hidden; }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(0, 0, 0, .72);
  cursor: pointer;
}

.lightbox-panel {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 400px);
  width: min(1140px, 100%);
  height: min(820px, calc(100vh - 56px));
  background: var(--media);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .5);
}

.lightbox-media {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--media);
}

.lightbox-media img,
.lightbox-media video {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.lightbox-media .swatch { width: 100%; height: 100%; min-height: 280px; font-size: 72px; }

.lightbox-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 999px;
  background: rgba(0, 0, 0, .55);
  color: #fff;
  font-size: 24px;
  line-height: 1;
}

.lightbox-side {
  background: var(--card);
  padding: 28px 22px 20px;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: auto;
}

.lightbox-side h2 { margin: 0 0 12px; font-size: 20px; line-height: 1.35; }

.lightbox-side .tagline { margin-bottom: 8px; }

.lightbox-side .tagline em {
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 3px 10px;
}

.account-page { max-width: 640px; }
.account-form { display: grid; gap: 12px; margin: 16px 0 28px; }
.account-form label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
.account-form input, .account-form textarea, .account-form select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  background: var(--input);
  color: inherit;
}
.account-form textarea { min-height: 140px; }
.drafts { padding-left: 18px; }
.drafts li { margin: 8px 0; }
.prompt-id { margin: 0 0 8px; color: var(--muted); font-size: 13px; }
.prompt-id code { color: var(--ink); }

.prompt-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 16px 0 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .08em;
}

.quiet-copy {
  border: 0;
  background: transparent;
  color: var(--accent);
  padding: 0;
  letter-spacing: 0;
  font-size: 14px;
}

.lightbox-side .result { flex: 1; min-height: 180px; }

.clip-detail { max-width: 1120px; margin: 0 auto; }

.clip-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: 28px;
  align-items: start;
}

.clip-stage .clip-media,
.clip-stage .swatch {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  background: var(--input);
}

.clip-stage .swatch { min-height: 320px; font-size: 64px; }

.clip-copy h2 { margin: 0 0 14px; font-size: 22px; line-height: 1.35; }

.clip-copy .tagline { margin-bottom: 16px; }

.clip-copy .tagline em {
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 4px 10px;
}

.clip-copy .result { min-height: 240px; max-height: 460px; }

.back { border: 0; background: transparent; color: var(--accent); padding: 0 0 12px; }

.slots { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }

.slots label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }

.slots input, .result {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  font: inherit;
}

.result { min-height: 140px; background: var(--input); white-space: pre-wrap; }

.note { margin-top: 14px; padding: 12px 14px; background: var(--accent-soft); border: 1px solid var(--line); border-radius: 6px; }

.steps { padding-left: 18px; }
.steps li { margin: 10px 0; }

/* Skills use an aligned editorial grid, independent of the prompt masonry. */
.skill-library { max-width: 1600px; margin: 0 auto; }
.skill-library .collection-toolbar { margin-bottom: 22px; }
.skill-intro { color: var(--muted); font-size: 14px; margin: 9px 0 0; }
.skill-filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.skill-filters button {
  display: inline-flex; align-items: center; gap: 10px; padding: 10px 15px;
  background: transparent; color: var(--muted); border: 1px solid var(--line);
  border-radius: 6px; font: inherit; font-size: 14px; cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease;
}
.skill-filters button:hover { border-color: var(--line-hover); color: var(--ink); }
.skill-filters button[aria-pressed="true"] { background: var(--accent-soft); color: var(--ink); border-color: var(--line-hover); }
.skill-filter-count { font-size: 12px; opacity: .75; font-variant-numeric: tabular-nums; }
.skill-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.skill-card {
  display: flex; flex-direction: column; min-width: 0; overflow: hidden;
  background: var(--card); border: 1px solid var(--line); border-radius: 8px;
  color: var(--ink); text-decoration: none; transition: border-color .15s ease;
}
.skill-card:hover { border-color: var(--line-hover); }
.skill-card:focus-visible, .skill-filters button:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; }
.skill-cover { aspect-ratio: 3 / 2; overflow: hidden; background: var(--media); border-bottom: 1px solid var(--line); }
.skill-cover img { display: block; width: 100%; height: 100%; object-fit: cover; }
.skill-card-body { display: flex; flex: 1; flex-direction: column; padding: 18px 19px 16px; }
.skill-card-labels { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 13px; font-size: 12px; }
.skill-category-tag { color: var(--accent); }
.skill-type { color: var(--muted); }
.skill-card h2 { font-size: 15px; line-height: 1.5; font-weight: 650; margin: 0 0 9px; }
.skill-card p { font-size: 13px; line-height: 1.8; color: var(--muted); margin: 0 0 18px; }
.skill-card-action { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 13px; border-top: 1px solid var(--line); color: var(--accent); font-size: 12px; }
.skill-card-action span { font-size: 17px; }
.skill-empty { padding: 70px 20px; text-align: center; border: 1px dashed var(--line); border-radius: 8px; }
.skill-empty h2 { font-size: 20px; margin: 0 0 12px; }
.skill-empty p, .skill-detail-summary { color: var(--muted); line-height: 1.8; font-size: 14px; }
.skill-empty a { display: inline-block; margin-top: 12px; color: var(--accent); }
@media (max-width: 1240px) { .skill-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 960px) { .skill-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; } }
@media (max-width: 580px) {
  .skill-grid { grid-template-columns: 1fr; }
  .skill-filters { gap: 8px; margin-bottom: 22px; }
  .skill-filters button { padding: 9px 12px; gap: 8px; font-size: 13px; }
  .skill-card-body { padding: 17px; }
}

/* Skill detail: readable document with a separate action and information column. */
.skill-detail-page { max-width: 1320px; margin: 0 auto; padding-top: 30px; }
.skill-back { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 14px; margin-bottom: 25px; }
.skill-back:hover { color: var(--accent); }
.skill-detail-layout { display: grid; grid-template-columns: minmax(0, 1fr) 282px; gap: 34px; align-items: start; }
.skill-detail-main, .skill-detail-sidebar { min-width: 0; }
.skill-detail-sidebar { align-self: stretch; }
.skill-detail-header h1 { margin: 0; font-size: clamp(22px, 2.2vw, 28px); line-height: 1.35; letter-spacing: -.5px; }
.skill-detail-header h1:focus { outline: none; }
.skill-detail-header > p { color: var(--muted); font-size: 15px; line-height: 1.9; margin: 16px 0 20px; max-width: 780px; }
.skill-detail-tags, .skill-side-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.skill-detail-tags { margin-bottom: 24px; }
.skill-detail-tags > *, .skill-side-chips > span { border: 1px solid var(--line); border-radius: 7px; color: var(--muted); padding: 4px 9px; font-size: 12px; }
.skill-detail-tags > a { color: var(--accent); background: var(--accent-soft); }
.skill-detail-cover { margin: 0; overflow: hidden; border-radius: 8px; border: 1px solid var(--line); background: var(--card); }
.skill-detail-cover img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.skill-detail-section { margin-top: 32px; }
.skill-detail-section > h2, .skill-document-heading > h2 { font-size: 21px; line-height: 1.45; margin: 0; }
.skill-section-note { color: var(--muted); font-size: 13px; margin: 7px 0 16px; }
.skill-examples { display: grid; gap: 10px; }
.skill-example { display: flex; gap: 20px; justify-content: space-between; align-items: center; border: 1px solid var(--line); border-radius: 8px; padding: 17px 19px; background: var(--card); }
.skill-example p { font-size: 14px; line-height: 1.85; margin: 0; }
.skill-example button { flex-shrink: 0; border: 0; background: transparent; color: var(--accent); font-size: 12px; padding: 6px 0; cursor: pointer; }
.skill-example button:disabled { opacity: .6; }
.skill-document-heading { display: flex; justify-content: space-between; align-items: center; gap: 15px; margin-bottom: 18px; flex-wrap: wrap; }
.skill-view-tabs { display: inline-flex; gap: 3px; background: var(--input); padding: 4px; border: 1px solid var(--line); border-radius: 6px; }
.skill-view-tabs button { border: 0; border-radius: 6px; padding: 7px 11px; background: transparent; color: var(--muted); font-size: 12px; cursor: pointer; }
.skill-view-tabs [aria-selected="true"] { background: var(--raised); color: var(--ink); }
.skill-prose { --skill-preview-height: 480; padding: 27px 30px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; font-size: 15px; line-height: 1.9; overflow-wrap: anywhere; color: var(--ink); }
.skill-prose-rest:not([hidden]) { display: contents; }
.skill-content-toggle { display: block; width: 100%; margin-top: 10px; padding: 13px 18px; border: 1px solid var(--line); border-radius: 6px; background: var(--card); color: var(--accent); font-size: 14px; cursor: pointer; }
.skill-content-toggle[hidden] { display: none; }
.skill-content-toggle:hover { border-color: var(--line-hover); background: var(--raised); }
.skill-document { scroll-margin-top: 24px; }
.skill-prose > :first-child { margin-top: 0; }
.skill-prose > :last-child { margin-bottom: 0; }
.skill-prose h1, .skill-prose h2, .skill-prose h3, .skill-prose h4, .skill-prose h5, .skill-prose h6 { color: var(--ink); line-height: 1.55; margin: 32px 0 14px; scroll-margin-top: 28px; }
.skill-prose h1 { font-size: 24px; }
.skill-prose h2 { font-size: 21px; border-bottom: 1px solid var(--line); padding-bottom: 11px; }
.skill-prose h3 { font-size: 18px; }
.skill-prose h4, .skill-prose h5, .skill-prose h6 { font-size: 14px; }
.skill-prose p { margin: 14px 0; }
.skill-prose ul, .skill-prose ol { padding-left: 24px; margin: 14px 0; }
.skill-prose li { margin: 6px 0; }
.skill-prose li > ul, .skill-prose li > ol { margin: 7px 0; }
.skill-prose a[href] { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.skill-prose blockquote { margin: 20px 0; padding: 1px 18px; border-left: 3px solid var(--line-hover); background: var(--input); color: var(--muted); }
.skill-prose code { font-family: Consolas, "SFMono-Regular", monospace; font-size: .9em; background: var(--input); border-radius: 4px; padding: 2px 5px; }
.skill-prose pre { max-width: 100%; overflow-x: auto; padding: 18px; background: var(--input); border: 1px solid var(--line); border-radius: 6px; line-height: 1.7; margin: 20px 0; }
.skill-prose pre code { padding: 0; background: transparent; border-radius: 0; white-space: pre; overflow-wrap: normal; }
.skill-prose hr { margin: 28px 0; border: 0; border-top: 1px solid var(--line); }
.skill-table-scroll { max-width: 100%; overflow-x: auto; margin: 20px 0; border: 1px solid var(--line); border-radius: 6px; }
.skill-prose table { border-collapse: collapse; min-width: 100%; font-size: 13px; line-height: 1.7; }
.skill-prose th, .skill-prose td { padding: 11px 14px; border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); text-align: left; min-width: 100px; vertical-align: top; }
.skill-prose th { background: var(--raised); color: var(--ink); font-weight: 600; }
.skill-prose tr:last-child td { border-bottom: 0; }
.skill-prose th:last-child, .skill-prose td:last-child { border-right: 0; }
.skill-doc-image { display: block; margin: 20px 0; }
.skill-doc-image img { display: block; max-width: 100%; height: auto; border-radius: 6px; }
.skill-doc-image a { display: inline-block; margin-top: 6px; font-size: 12px; }
.skill-doc-image.image-unavailable { padding: 15px; background: var(--input); border: 1px solid var(--line); border-radius: 8px; }
.skill-raw { display: block; width: 100%; min-height: 650px; resize: vertical; padding: 23px; border: 1px solid var(--line); border-radius: 8px; background: var(--input); color: var(--ink); font: 13px/1.85 Consolas, monospace; }
.skill-related { display: grid; gap: 10px; margin-top: 18px; }
.skill-related > a { display: flex; gap: 16px; align-items: center; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); }
.skill-related > a:hover { border-color: var(--line-hover); }
.skill-related img { width: 96px; height: 52px; object-fit: cover; border-radius: 7px; }
.skill-related strong { display: block; font-size: 14px; font-weight: 600; }
.skill-related small { display: block; margin-top: 6px; color: var(--muted); font-size: 12px; }
.skill-related > a > span:last-child { margin-left: auto; color: var(--accent); }
.skill-side-sticky { position: sticky; top: 20px; max-height: calc(100vh - 40px); overflow-y: auto; scrollbar-width: thin; padding-right: 5px; }
.skill-use-box { margin-bottom: 17px; }
.skill-use-box h2 { font-size: 15px; font-weight: 600; margin: 0 0 13px; }
.skill-use-box > button { width: 100%; border-radius: 6px; padding: 12px; font-size: 14px; cursor: pointer; }
.skill-primary-action { background: var(--accent-fill); color: var(--on-accent); border: 1px solid var(--accent-fill); font-weight: 600; }
.skill-primary-action:hover { background: var(--accent-fill-hover); }
.skill-secondary-action { background: transparent; border: 1px solid var(--line); color: var(--ink); margin-top: 9px; }
.skill-secondary-action:hover { border-color: var(--line-hover); }
.skill-use-box > p { color: var(--muted); font-size: 12px; line-height: 1.8; margin: 12px 2px 0; }
.skill-use-box .skill-copy-status:empty { display: none; }
.skill-use-box .skill-copy-status { color: var(--accent); }
.skill-side-box { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 17px; margin-top: 13px; }
.skill-side-box h2, .skill-side-box > summary { margin: 0 0 12px; font-size: 14px; font-weight: 600; }
.skill-side-box > summary { cursor: pointer; margin-bottom: 0; }
.skill-side-box[open] > summary { margin-bottom: 12px; }
.skill-side-box > ul { margin: 0; padding-left: 17px; color: var(--muted); font-size: 13px; line-height: 1.9; }
.skill-toc-items { display: grid; gap: 3px; max-height: 240px; overflow-y: auto; scrollbar-width: thin; }
.skill-toc-items button { color: var(--muted); border: 0; background: transparent; padding: 7px 0; font-size: 12px; text-align: left; line-height: 1.6; cursor: pointer; overflow-wrap: anywhere; }
.skill-toc-items button:hover { color: var(--accent); }
.skill-source p, .skill-source code { color: var(--muted); font-size: 12px; overflow-wrap: anywhere; line-height: 1.8; }
.skill-detail-page button:focus-visible, .skill-detail-page a:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
@media (max-width: 1000px) {
  .skill-detail-layout { grid-template-columns: minmax(0, 1fr) 250px; gap: 16px; }
  .skill-prose { padding: 22px; }
}
@media (max-width: 760px) {
  .skill-detail-layout { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .skill-detail-sidebar, .skill-side-sticky { display: contents; }
  .skill-detail-main { display: contents; }
  .skill-detail-header { grid-row: 1; }
  .skill-detail-cover { grid-row: 3; }
  .skill-detail-sidebar .skill-side-box { margin-top: 0; }
  .skill-detail-sidebar .skill-toc { grid-row: 4; }
  .skill-detail-sidebar .skill-toc-items { max-height: 150px; }
  .skill-use-box { grid-row: 2; margin-bottom: 0; }
  .skill-example { flex-direction: column; gap: 10px; align-items: flex-start; }
  .skill-detail-section { margin-top: 3px; }
  .skill-detail-header > p { margin-bottom: 15px; }
  .skill-detail-tags { margin-bottom: 0; }
  .skill-prose { --skill-preview-height: 360; padding: 18px; font-size: 14px; }
  .skill-prose h1 { font-size: 22px; }
  .skill-prose h2 { font-size: 19px; }
  .skill-prose h3 { font-size: 14px; }
  .skill-raw { min-height: 500px; padding: 16px; }
  .skill-back { margin-bottom: 20px; }
}

.foot {
  border-top: 1px solid var(--line);
  background: var(--sidebar);
  padding: 18px 32px 28px;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

@media (max-width: 1400px) {
  .grid { column-count: 4; }
}

@media (max-width: 1200px) {
  .grid { column-count: 3; }
}

@media (max-width: 1024px) {
  .bar { height: auto; min-height: 52px; flex-wrap: wrap; gap: 0; padding-top: 14px; }
  .brand { border: 0; padding-right: 0; }
  .bar > .quiet { margin-left: auto; }
  #nav { order: 3; flex-basis: 100%; flex-wrap: wrap; gap: 8px 4px; margin-top: 10px; padding-bottom: 14px; }
  #nav > button, #nav .nav-category, #nav summary { font-size: 14px; padding: 8px; gap: 6px; }
  #nav [aria-current="page"]::after { bottom: -4px; }
  .nav-group { position: static; }
  .model-menu { left: 16px; right: 16px; top: calc(100% + 4px); width: auto; }
}

@media (max-width: 900px) {
  .slots { grid-template-columns: 1fr 1fr; }
  .grid { column-count: 2; }
  .bar, .wrap, .foot { padding-left: 16px; padding-right: 16px; }
  .clip-layout { grid-template-columns: 1fr; }
  .clip-copy h2 { font-size: 24px; }
  .lightbox { padding: 12px; }
  .lightbox-panel { grid-template-columns: 1fr; height: auto; max-height: calc(100vh - 24px); }
  .lightbox-media { min-height: 220px; }
}

@media (max-width: 620px) {
  .collection-toolbar { flex-direction: column; align-items: stretch; gap: 16px; margin-bottom: 20px; }
  .search-card { width: 100%; }
  .search-line button { padding: 10px 14px; font-size: 14px; }
  .search-line input { font-size: 14px; padding: 10px; }
  .foot { gap: 8px; }
}

/* Shared desktop-like controls and density, including the narrow library host. */
body { min-height: 100vh; }
h1, h2, h3, .meta strong, .brand { color: var(--title); }
button, select { font-family: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; }
button:active:not(:disabled) { filter: brightness(.94); }
:where(input, textarea, select):focus { border-color: var(--focus); }
:where(a, button, input, textarea, select):focus-visible { outline-offset: 2px; }
select:focus-visible { outline: 2px solid var(--focus); }
* { scrollbar-width: thin; scrollbar-color: var(--line-hover) var(--bg); }
.brand { font-size: 15px; padding-right: 20px; letter-spacing: 0; }
#nav { gap: 4px; }
#nav > button, #nav .nav-category, #nav summary { border-radius: 6px; padding: 6px 10px; gap: 6px; }
#nav .nav-category { border-radius: 6px 0 0 6px; }
#nav .nav-models summary {
  justify-content: center; width: 32px; height: 100%; padding: 6px;
  border-radius: 0 6px 6px 0; border-left: 1px solid var(--line-subtle);
}
#nav .nav-models { display: flex; }
#nav .nav-models .nav-chevron { margin: -3px 0 0; }
#nav .nav-models[open] summary { background: var(--raised); color: var(--accent); }
#nav [aria-current="page"] { background: var(--accent-soft); color: var(--title); }
#nav [aria-current="page"]::after { bottom: -9px; background: var(--accent-fill); }
.nav-count { padding: 0 5px; background: var(--input); color: var(--muted); }
#nav [aria-current="page"] .nav-count { background: var(--accent-soft); }
.model-menu { border-color: var(--line-hover); box-shadow: 0 8px 24px #0005; }
.collection-toolbar { gap: 20px; margin-bottom: 18px; }
.collection-title { font-size: 16px; gap: 10px; }
.result-count { color: var(--subtle); font-size: 12px; }
.search-card { width: min(400px, 48%); }
.search-line input { padding: 7px 11px; min-height: 34px; border-radius: 6px; }
.search-line button { padding: 6px 16px; min-height: 34px; border-radius: 6px; }
.copy { padding: 8px 16px; font-weight: 600; }
.card, .skill-card { border-color: var(--line-subtle); border-radius: 8px; }
.card:hover, .skill-card:hover { border-color: var(--line-hover); }
.card:hover .meta strong { color: var(--title); }
.card:focus-visible, .skill-card:focus-visible { outline-offset: 2px; }
.cover, .hero-cover { background: var(--media); }
.masonry { gap: 12px; }
.meta strong { font-weight: 600; overflow-wrap: anywhere; }
.tagline { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 9px; }
.tagline em, .lightbox-side .tagline em, .clip-copy .tagline em {
  margin: 0; padding: 2px 6px; border-radius: 4px;
  background: var(--raised); border: 1px solid var(--line);
  color: var(--muted); font-size: 11px; line-height: 1.5;
}
.pager { margin: 20px 0 0; }
.pager button, .page-jump button, .page-jump input { height: 32px; border-radius: 6px; font-size: 13px; }
.pager button[aria-current="page"] { background: var(--accent-soft); color: var(--title); border-color: var(--accent-fill); }
.lightbox-panel { border: 1px solid var(--line); border-radius: 10px; }
.lightbox-side { background: var(--sidebar); padding: 22px 20px 18px; }
.lightbox-close { border: 1px solid var(--line-hover); border-radius: 6px; }
.result { color: var(--ink); line-height: 1.75; resize: vertical; }
.prompt-head { letter-spacing: 0; }
.clip-layout { gap: 22px; }
.clip-copy, .lightbox-side { min-width: 0; }
.skill-filters { gap: 8px; margin-bottom: 20px; }
.skill-filters button { padding: 7px 12px; font-size: 13px; border-radius: 6px; }
.skill-filters button[aria-pressed="true"] { border-color: var(--accent-fill); }
.skill-card-body { padding: 14px; }
.skill-card-labels { margin-bottom: 10px; }
.skill-category-tag { color: var(--muted); }
.skill-card-action { color: var(--muted); }
.skill-card:hover .skill-card-action { color: var(--accent); }
.skill-side-box { border-color: var(--line-subtle); }
.skill-use-box > button { padding: 9px 12px; border-radius: 6px; }
.account-form input, .account-form textarea, .account-form select { font-size: 14px; }
.foot { border-color: var(--line-subtle); padding: 16px 24px; font-size: 12px; color: var(--subtle); }
@media (max-width: 1024px) {
  .bar { min-height: 48px; gap: 8px; padding-top: 10px; }
  .brand { margin-right: auto; padding: 0; }
  .bar > .quiet { margin-left: 0; padding: 5px 8px; font-size: 12px; }
  #nav { margin-top: 2px; padding-bottom: 10px; gap: 4px; }
  #nav > button, #nav .nav-category, #nav summary { padding: 6px 8px; font-size: 13px; }
  #nav [aria-current="page"]::after { bottom: -5px; height: 2px; }
}
@media (max-width: 900px) {
  .bar, .wrap, .foot { padding-left: 16px; padding-right: 16px; }
  .lightbox-panel { display: flex; flex-direction: column; height: calc(100dvh - 24px); }
  .lightbox-media { flex: 0 1 40%; min-height: 140px; overflow: hidden; }
  .lightbox-media img, .lightbox-media video { max-height: 35vh; }
  .lightbox-side { flex: 1; min-height: 0; }
}
@media (max-width: 620px) {
  .wrap { padding-top: 16px; }
  .collection-toolbar { gap: 12px; margin-bottom: 16px; }
  .search-card { width: 100%; }
  .search-line input { font-size: 14px; padding: 7px 10px; }
  .search-line button { padding: 6px 14px; }
  .slots { grid-template-columns: minmax(0, 1fr); }
  .meta { padding: 10px; }
  .meta strong { font-size: 13px; }
  .skill-detail-page { padding-top: 18px; }
  .foot { gap: 8px; }
}

@media (max-width: 480px) {
  .grid { column-count: 1; }
}