/*
 * Intent's whole stylesheet: a thin layer over browser defaults.
 * If this file fails to load, layout should suffer but look-and-feel should not.
 * Colors come from the browser via color-scheme; no custom palette.
 */

:root {
  color-scheme: light dark;
  /* The same system colours the browser would use, made explicit so tools (and embeds)
     that can't see the canvas don't assume black on white. */
  background-color: Canvas;
  color: CanvasText;
}

:root[data-theme="light"] {
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

body {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1rem;
  line-height: 1.5;
}

header,
footer {
  padding-block: 1rem;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav form {
  margin: 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 0.5rem;
  padding: 0;
  list-style: none;
}

.breadcrumb li + li::before {
  content: "/";
  content: "/" / "";
  margin-inline-end: 0.5rem;
}

textarea {
  box-sizing: border-box;
  width: 100%;
  max-width: 80ch;
}

table {
  border-collapse: collapse;
}

.diff tbody + tbody {
  border-top: 1px solid;
}

.diff td:last-child {
  white-space: pre-wrap;
  font-family: monospace;
}

th,
td {
  padding: 0.25rem 0.75rem 0.25rem 0;
  text-align: start;
  vertical-align: top;
}

p,
li,
dd {
  max-width: 70ch;
}

img {
  max-width: 100%;
  height: auto;
}

:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

/* Discussion. Threads and comments are indented by a rule, nothing more. */

.thread,
.timeline > li {
  margin-block: 0.75rem;
}

.thread {
  padding-inline-start: 0.75rem;
  border-inline-start: 2px solid color-mix(in srgb, CanvasText 30%, Canvas);
}

.comment {
  margin-block: 0.75rem;
}

.comment > header {
  font-size: 0.9em;
}

.timeline {
  padding: 0;
  list-style: none;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: start;
  gap: 0.5rem 1rem;
}

form.inline {
  display: inline;
}

.line-comment > summary {
  font-size: 0.85em;
}

.block:target,
.comment:target,
.thread:target {
  outline: 2px dashed currentColor;
  outline-offset: 4px;
}

/* Files. Pins are an SVG overlay positioned in percentages, so they track the image. */

.pinboard {
  position: relative;
  display: inline-block;
  margin: 0;
}

.pinboard img {
  display: block;
}

.pinboard.placing img {
  cursor: crosshair;
}

.pins {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.pins a {
  pointer-events: auto;
}

.pins circle {
  fill: Mark;
  stroke: MarkText;
  stroke-width: 2;
}

.pins circle.pending {
  fill: none;
  stroke-dasharray: 4 3;
}

.pins text {
  fill: MarkText;
  font: bold 12px sans-serif;
  text-anchor: middle;
  dominant-baseline: central;
}

.pins a:focus-visible circle {
  stroke-width: 4;
}

.prototype {
  width: 100%;
  height: 70vh;
  border: 1px solid;
}

pre.quote {
  white-space: pre-wrap;
  padding-inline-start: 0.75rem;
  border-inline-start: 2px solid;
}

.skip-link {
  position: absolute;
  left: -100vw;
}

.skip-link:focus {
  position: static;
}

.muted {
  color: color-mix(in srgb, CanvasText 70%, Canvas);
}

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