/* Latent project page. A neutral grey surround, like a print viewing booth,
   so the photographs keep their own color. Prose is set in a serif, the parts that
   stand in for the app use the system face, and metadata uses a monospace face. */
:root {
  --paper: #f3f3f3;
  --ink: #141414;
  --muted: #5c5c5c;
  --faint: #8a8a8a;
  --rule: #d5d5d5;
  --raised: #ffffff;
  --well: #e7e7e7;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.06), 0 10px 30px rgb(0 0 0 / 0.07);
  --serif: Charter, "Bitstream Charter", "Iowan Old Style", "Sitka Text", Cambria, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, "DejaVu Sans Mono", "Cascadia Mono", Consolas, monospace;
  --gutter: clamp(16px, 4vw, 40px);
  --measure: 62ch;
  --page: min(1180px, calc(100% - 2 * var(--gutter)));
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0e0e0e;
    --ink: #e6e6e6;
    --muted: #a0a0a0;
    --faint: #6e6e6e;
    --rule: #2a2a2a;
    --raised: #1a1a1a;
    --well: #1d1d1d;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.5), 0 10px 30px rgb(0 0 0 / 0.4);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { scroll-behavior: smooth; scroll-padding-top: 24px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.6 var(--serif);
  font-kerning: normal;
  -webkit-text-size-adjust: 100%;
}

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
button { font: inherit; color: inherit; }

code, pre, kbd { font-family: var(--mono); font-size: 0.82em; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* Masthead */
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: var(--page);
  margin: 0 auto;
  padding: 20px 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  text-decoration: none;
}
.mark { width: 26px; height: 26px; fill: currentColor; }
.masthead nav { display: flex; gap: clamp(14px, 3vw, 28px); font-size: 16px; white-space: nowrap; }
@media (max-width: 520px) { .masthead .nav-search { display: none; } }
.masthead nav a { text-decoration: none; color: var(--muted); }
.masthead nav a:hover { color: var(--ink); text-decoration: underline; }

main, .colophon { width: var(--page); margin-inline: auto; }

/* Intro: the headline and what Latent is, side by side on wide screens */
.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: end;
  padding: clamp(36px, 8vw, 104px) 0 clamp(36px, 6vw, 72px);
}
.intro h1 {
  margin: 0;
  font-size: clamp(44px, 7vw, 84px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.intro-text p { margin: 0 0 18px; max-width: var(--measure); }
.intro-text p:last-child { margin-bottom: 0; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; }
.button {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 6px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}
.button:hover { text-decoration: underline; }
.status { font: 13px/1.5 var(--mono); color: var(--faint); }
@media (max-width: 800px) {
  .intro { grid-template-columns: minmax(0, 1fr); align-items: start; }
}

/* The search: a stand-in for the app's search bar, then the ranked gallery */
.search { padding-bottom: 8px; }
.finder { max-width: 780px; margin: 0 auto; font-family: var(--sans); }
.bar {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 10px 0 16px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  background: var(--raised);
  box-shadow: var(--shadow);
}
.bar-icon { flex: none; width: 19px; height: 19px; fill: none; stroke: var(--faint); stroke-width: 2; stroke-linecap: round; }
.bar-reference { flex: none; width: 30px; height: 30px; border-radius: 5px; object-fit: cover; }
.bar-text {
  flex: 1;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  font-size: 17px;
  line-height: 1.3;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.bar-query[data-typing]::after {
  content: "";
  display: inline-block;
  width: 1.5px;
  height: 1.1em;
  margin-left: 1px;
  vertical-align: -0.15em;
  background: currentColor;
}
.bar-note { margin-left: 0.7em; font-size: 14px; color: var(--faint); }
.bar-clear {
  flex: none;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--well);
  cursor: pointer;
}
.bar-clear svg { width: 14px; height: 14px; fill: none; stroke: var(--muted); stroke-width: 2.2; stroke-linecap: round; }

.queries {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}
.queries button {
  padding: 7px 13px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.2;
  cursor: pointer;
}
.queries button:hover { border-color: var(--faint); color: var(--ink); }
.queries button[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: var(--paper); }

.results-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  margin: clamp(32px, 5vw, 52px) 0 16px;
  font: 14px/1.3 var(--sans);
  color: var(--muted);
}
.results-count { margin: 0; }
.order {
  display: inline-flex;
  margin: 0;
  padding: 2px;
  border: 0;
  border-radius: 8px;
  background: var(--well);
}
.order label { position: relative; }
.order input { position: absolute; inset: 0; margin: 0; opacity: 0; cursor: pointer; }
.order span { display: block; padding: 5px 11px; border-radius: 6px; }
.order input:checked + span { background: var(--raised); color: var(--ink); box-shadow: 0 1px 2px rgb(0 0 0 / 0.12); }
.order input:focus-visible + span { outline: 2px solid var(--ink); outline-offset: 1px; }

/* The gallery is laid out by page.js, like the app's masonry: each photo goes into
   the shortest column, in rank order. */
.gallery {
  --caption: 34px;
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.tile { position: absolute; top: 0; left: 0; }
.tile[inert] { opacity: 0; visibility: hidden; pointer-events: none; }
.tile-button {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  text-align: left;
  cursor: zoom-in;
}
.tile img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
  transition: filter 160ms ease;
}
.tile-button:hover img { filter: brightness(1.06); }
.tile-caption {
  display: flex;
  align-items: baseline;
  gap: 10px;
  height: var(--caption);
  padding-top: 7px;
  font: 12px/1.4 var(--mono);
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.tile-name { color: var(--ink); }
.tile-score { margin-left: auto; }

.gallery-more { margin: 8px 0 0; text-align: center; }
.text-button {
  padding: 4px 2px;
  border: 0;
  background: none;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  cursor: pointer;
}
.text-button:hover { text-decoration-thickness: 2px; }
.search-note { max-width: var(--measure); margin: 28px auto 0; font-size: 15px; color: var(--muted); }

/* The app window */
.window { margin: clamp(72px, 11vw, 136px) 0 0; }
.window img { display: block; width: 100%; height: auto; }
.window figcaption { max-width: var(--measure); margin: 8px auto 0; font-size: 15px; color: var(--muted); text-align: center; }

/* What Latent does: one row per feature, the name beside the detail */
.tracks { margin-top: clamp(72px, 10vw, 128px); border-bottom: 1px solid var(--rule); }
.track {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 12px clamp(24px, 5vw, 72px);
  padding: 30px 0 32px;
  border-top: 1px solid var(--rule);
}
.track h2 { margin: 0; font-size: 26px; font-weight: 400; line-height: 1.2; text-wrap: balance; }
.tag { margin: 8px 0 0; font: 12px/1.4 var(--mono); color: var(--faint); letter-spacing: 0.06em; text-transform: uppercase; }
.track-body { max-width: var(--measure); }
.track-body > :first-child { margin-top: 0; }
.track-body > :last-child { margin-bottom: 0; }
.engines dt { font-weight: 700; }
.engines dd { margin: 0 0 12px; }
.keys { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; align-items: baseline; }
.keys dt { white-space: nowrap; }
.keys dd { margin: 0; }
kbd {
  display: inline-block;
  min-width: 1.9em;
  padding: 1px 6px;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--raised);
  font-size: 13px;
  text-align: center;
}
@media (max-width: 760px) {
  .track { grid-template-columns: minmax(0, 1fr); }
}

/* Longer sections: a heading beside the body on wide screens */
.section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 16px clamp(24px, 5vw, 72px);
  padding: clamp(56px, 8vw, 96px) 0 0;
}
.section > h2 { margin: 0; font-size: clamp(30px, 4vw, 44px); font-weight: 400; line-height: 1.1; letter-spacing: -0.01em; text-wrap: balance; }
.section-body { max-width: 68ch; }
.section-body > :first-child { margin-top: 0; }
.section-wide { grid-template-columns: minmax(0, 1fr); row-gap: 32px; }
.section-wide .section-body { max-width: none; }
.section-wide .section-body > p { max-width: var(--measure); }
@media (max-width: 760px) {
  .section { grid-template-columns: minmax(0, 1fr); }
}

.privacy table { width: 100%; margin: 24px 0; border-collapse: collapse; }
.privacy th, .privacy td { padding: 12px 16px 12px 0; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; }
.privacy thead th { padding-top: 0; font: 12px/1.4 var(--mono); color: var(--faint); letter-spacing: 0.06em; text-transform: uppercase; }
.privacy tbody th { font-weight: 400; white-space: nowrap; }
@media (max-width: 520px) { .privacy tbody th { white-space: normal; } }
.ledger { margin: 0; padding: 0; list-style: none; }
.ledger li { position: relative; margin: 0 0 12px; padding-left: 22px; }
.ledger li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 10px; border-top: 1px solid var(--ink); }

.layers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px clamp(24px, 4vw, 48px);
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
  counter-reset: layer;
}
.layers li { padding-top: 14px; border-top: 2px solid var(--ink); counter-increment: layer; }
.layers h3 { margin: 0; font-size: 24px; font-weight: 400; line-height: 1.25; }
.layers h3::before { content: counter(layer) " "; font: 13px/1 var(--mono); color: var(--faint); vertical-align: 0.25em; }
.layers .tag { margin-top: 4px; }
.layers li p:last-child { margin: 12px 0 0; }
@media (max-width: 760px) {
  .layers { grid-template-columns: minmax(0, 1fr); }
}

.requirements, .steps { padding-left: 1.2em; }
.requirements li, .steps li { margin-bottom: 4px; }
.commands { position: relative; margin: 24px 0; }
.commands pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--raised);
  font-size: 14px;
  line-height: 1.7;
}
.commands pre code { font-size: inherit; }
.copy {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 4px 10px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--paper);
  color: var(--muted);
  font: 13px/1.4 var(--sans);
  cursor: pointer;
}
.copy:hover { color: var(--ink); }

.colophon {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 24px;
  margin-top: clamp(72px, 10vw, 120px);
  padding: 24px 0 48px;
  border-top: 1px solid var(--rule);
  font-size: 14px;
  color: var(--muted);
}
.colophon p { margin: 0; }

/* The photo viewer, like the app's preview: the photo, then a floating bar of details */
.viewer {
  width: min(1500px, calc(100vw - 32px));
  max-width: none;
  max-height: none;
  margin: auto;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  overflow: visible;
}
.viewer::backdrop { background: rgb(8 8 8 / 0.86); }
.viewer[open] { animation: viewer-in 220ms var(--ease); }
@keyframes viewer-in { from { opacity: 0; transform: scale(0.985); } }
@media (prefers-reduced-motion: reduce) { .viewer[open] { animation: none; } }
.viewer-frame { display: flex; justify-content: center; outline: none; }
.viewer-image {
  display: block;
  max-width: 100%;
  max-height: calc(100svh - 170px);
  width: auto;
  height: auto;
  border-radius: 2px;
}
.viewer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  width: fit-content;
  max-width: 100%;
  margin: 14px auto 0;
  padding: 10px 10px 10px 18px;
  border-radius: 12px;
  background: var(--raised);
  box-shadow: var(--shadow);
  font: 14px/1.4 var(--sans);
}
.viewer-info h3 { margin: 0; font-size: 14px; font-weight: 600; }
.viewer-info p, .viewer-score { margin: 0; font: 12px/1.5 var(--mono); color: var(--muted); }
.viewer-score { max-width: 36ch; }
.viewer-actions { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.icon-button {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}
.icon-button:hover { background: var(--well); }
.icon-button svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.pill-button {
  padding: 7px 14px;
  border: 0;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
  cursor: pointer;
}
.pill-button:disabled { opacity: 0.4; cursor: default; }
@media (max-width: 640px) {
  .viewer { width: calc(100vw - 16px); }
  .viewer-image { max-height: calc(100svh - 230px); }
  .viewer-actions { width: 100%; margin-left: 0; }
  .viewer-actions .pill-button { margin-right: auto; order: -1; }
}