/* What the toolkit adds to the HeedVision site's own look. shared/theme.css and shared/hv.css are unchanged
   copies from the paper site: tokens, buttons, the page column, scroll progress and the edge blur all come
   from there. */

:root {
  --changed: color-mix(in srgb, var(--accent) 20%, var(--surface-2));
  --c-comment: color-mix(in srgb, var(--fg) 58%, transparent);
  --c-string: #a83c63;
  --c-keyword: #8a4a1c;
  --c-number: #2a64b8;
}

.dark {
  --c-string: #f08fbf;
  --c-keyword: #f8a45a;
  --c-number: #8db8ff;
}

/* While SN Pro is on its way: the page's text is hidden and laid out, and a skeleton stands in. The skeleton
   waits a moment to appear, so a font that's already cached doesn't flash it. */
.page-skel {
  display: none;
}

.fonts-pending .page-skel {
  display: block;
  position: absolute;
  top: 0;
  left: 50%;
  width: min(780px, 100%);
  padding: 56px 20px 0;
  transform: translateX(-50%);
  pointer-events: none;
  animation: skel-appear 1ms 150ms both;
}

@keyframes skel-appear {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fonts-pending main,
.fonts-pending .site-foot {
  visibility: hidden;
}

.skel-page-title {
  width: 34%;
  height: 56px;
  margin: 16px 0 24px;
}

.page-skel .skel-line:nth-of-type(3) {
  width: 72%;
}

.page-skel .skel-line:last-child {
  width: 58%;
}

.skel-page-actions {
  width: 62%;
  height: 40px;
  margin: 28px 0;
  border-radius: var(--radius);
}

/* Links: colour alone, no underline. */
a {
  text-decoration: none;
  transition: color 140ms;
}

a:hover {
  color: var(--title);
}

.prose a,
.venue a,
.site-foot a {
  font-weight: var(--w-strong);
}

.btn:hover {
  color: var(--fg);
}

code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.88em;
}

.prose pre,
.code-panel pre {
  margin: 16px 0;
  padding: 16px 18px;
  overflow-x: auto;
  border-radius: var(--radius);
  background: var(--surface-2);
  box-shadow: var(--well);
  font-size: 13.5px;
  line-height: 1.6;
}

pre code {
  font-size: inherit;
}

.c-comment { color: var(--c-comment); }
.c-string { color: var(--c-string); }
.c-keyword { color: var(--c-keyword); }
.c-number { color: var(--c-number); }

/* Title */

.toolkit-title {
  margin: 16px 0 10px;
  color: var(--title);
  font-size: clamp(64px, 11vw, 104px);
  font-weight: var(--w-display);
  line-height: 1;
  letter-spacing: -0.03em;
}

/* Reading pages: Markdown takes the paper page's headings. */

.prose h1 {
  margin: 16px 0 14px;
  color: var(--title);
  font-size: clamp(38px, 6vw, 56px);
  font-weight: var(--w-display);
  letter-spacing: -0.02em;
}

.prose h2 {
  margin: 52px 0 12px;
  color: color-mix(in srgb, var(--title) 78%, var(--sec-ink));
  font-size: 25px;
  letter-spacing: -0.014em;
}

.prose h3 {
  margin: 28px 0 8px;
  font-size: 19px;
}

.prose li {
  margin: 4px 0;
  max-width: 66ch;
}

.prose table {
  display: block;
  margin: 16px 0;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.45;
}

.prose th {
  text-align: left;
  font-weight: var(--w-strong);
}

.prose th,
.prose td {
  padding: 6px 18px 6px 0;
  vertical-align: top;
}

/* Contents on screens too narrow for the rail beside the page. */
.inline-toc {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  columns: 2;
  column-gap: 24px;
  font-size: 15px;
}

.inline-toc li {
  margin: 0 0 4px;
  break-inside: avoid;
}

@media (min-width: 1241px) {
  .inline-toc {
    display: none;
  }
}

/* Playground: wider than the page's column, and still centred on it. */

.wide {
  --wide: min(1120px, 100vw - 40px);
  width: var(--wide);
  margin-left: calc((100% - var(--wide)) / 2);
}

.playground-actions {
  margin: 16px 0 20px;
}

.views {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.playground[data-count="1"] .views {
  grid-template-columns: minmax(0, 1fr);
}

@media (max-width: 700px) {
  .views {
    grid-template-columns: minmax(0, 1fr);
  }
}

.view-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  min-height: 40px;
  margin: 0 0 8px;
}

.who {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 16px;
  font-weight: var(--w-strong);
  letter-spacing: 0;
}

.dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--person);
}

.stage {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface-2);
  box-shadow: var(--plate);
}

.playground[data-count="1"] .stage {
  aspect-ratio: 16 / 9;
}

/* Held open with a pulse until the playground's module arrives. */
.stage.skel {
  display: block;
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: none;
}

.stage > canvas:not(.caav-panel) {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: var(--radius);
  touch-action: pan-y; /* a vertical swipe still scrolls the page */
  cursor: grab;
}

.stage > canvas:not(.caav-panel):focus-visible {
  outline-offset: -3px;
}

.caav-panel {
  border-radius: var(--radius);
}

/* Shows where this person's head ray is pointing. */
.reticle {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid var(--person);
  border-radius: 50%;
  pointer-events: none;
}

.status {
  margin: 8px 0 0;
  min-height: calc(2 * 1.45em);
  color: var(--fg-3);
  font-size: 14px;
  line-height: 1.45;
  font-variant-numeric: tabular-nums;
}

/* Narrow views can wrap the status to three lines, so that height is held from the start. */
@media (max-width: 860px) {
  .status {
    min-height: calc(3 * 1.45em);
  }
}

.code-panel {
  margin-top: 24px;
}

.code-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
}

.code-head p {
  margin: 0;
  color: var(--fg-3);
  font-size: 15px;
}

.line {
  display: block;
  min-height: 1.6em;
  margin: 0 -18px;
  padding: 0 18px;
}

.line.changed {
  background: var(--changed);
}

/* Leva's floating panel starts below the sound switch, so its scrolling part has to stop sooner than Leva assumes. */
[class*="-fill-false"] > div:last-child {
  max-height: calc(100vh - 120px) !important;
}

/* Footer */

.site-foot .logos {
  min-height: 30px;
}

.foot-end {
  min-height: 40px;
}