/* VSCodroid documentation site.
 *
 * One stylesheet, no external requests. Nothing here reaches a CDN, a font
 * service or an analytics endpoint, which is the same commitment the app itself
 * makes and the only version of it a reader can verify by watching the network
 * tab.
 *
 * Dark first, because the audience reads code on a phone and almost always in
 * the dark. Light is a full palette rather than an afterthought: the app ships
 * both and the walkthrough screenshots are light.
 */

:root {
  /* Light is the base so that every token has a value outside a media query.
   * A colour whose only definition lives inside one is a colour that vanishes
   * when the query does not match. */
  --bg: #ffffff;
  --bg-sunken: #f6f7f9;
  --bg-raised: #ffffff;
  --border: #e3e6ea;
  --border-strong: #cfd4da;
  --text: #16191d;
  --text-dim: #5a626c;
  --text-faint: #858d97;
  --accent: #0a63c9;
  --accent-hover: #084d9e;
  --accent-quiet: #e8f0fb;
  --code-bg: #f2f4f7;
  --shadow: 0 1px 2px rgb(16 25 40 / 6%), 0 8px 24px rgb(16 25 40 / 6%);
  --shadow-lift: 0 2px 4px rgb(16 25 40 / 8%), 0 24px 48px rgb(16 25 40 / 12%);

  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo,
    Consolas, monospace;

  --measure: 68ch;
  --page: 1120px;
  --radius: 10px;
  --radius-lg: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116;
    --bg-sunken: #0a0d11;
    --bg-raised: #151a21;
    --border: #232a33;
    --border-strong: #333c48;
    --text: #e6eaf0;
    --text-dim: #a2acba;
    --text-faint: #6e7885;
    --accent: #4da3ff;
    --accent-hover: #7bbcff;
    --accent-quiet: #14243a;
    --code-bg: #11161c;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 8px 24px rgb(0 0 0 / 30%);
    --shadow-lift: 0 2px 4px rgb(0 0 0 / 50%), 0 24px 48px rgb(0 0 0 / 45%);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

code,
kbd,
pre {
  font-family: var(--mono);
  font-size: 0.9em;
}

/* --- Layout ------------------------------------------------------------- */

.wrap {
  max-width: var(--page);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.prose {
  max-width: var(--measure);
}

/* --- Skip link ---------------------------------------------------------- */

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius) 0;
  z-index: 100;
}

.skip:focus {
  left: 0;
}

/* --- Header ------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 62px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 650;
  letter-spacing: -0.015em;
  color: var(--text);
  text-decoration: none;
  font-size: 1.02rem;
}

.brand img {
  width: 26px;
  height: 26px;
  border-radius: 6px;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2.5vw, 1.6rem);
  font-size: 0.94rem;
}

.site-nav a {
  color: var(--text-dim);
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--text);
}

/* --- Buttons ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: 560;
  font-size: 0.97rem;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease,
    transform 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--text);
  background: transparent;
}

.btn-ghost:hover {
  background: var(--bg-sunken);
  color: var(--text);
}

/* --- Hero --------------------------------------------------------------- */

.hero {
  padding-block: clamp(3rem, 9vw, 6rem) clamp(2.5rem, 7vw, 4.5rem);
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(
      60rem 30rem at 15% -10%,
      var(--accent-quiet),
      transparent 65%
    ),
    var(--bg);
}

.hero-grid {
  display: grid;
  gap: clamp(2.5rem, 6vw, 4rem);
  grid-template-columns: 1fr;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

.hero h1 {
  font-size: clamp(2.4rem, 6.5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.033em;
  margin: 0 0 1rem;
  font-weight: 700;
}

.hero .lede {
  font-size: clamp(1.08rem, 2.1vw, 1.28rem);
  color: var(--text-dim);
  margin: 0 0 2rem;
  max-width: 34ch;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.4rem;
}

.hero-note {
  font-size: 0.88rem;
  color: var(--text-faint);
  margin: 0;
}

/* The screenshot, presented as the device it was taken on rather than as a
 * floating rectangle. The frame is drawn in CSS so it costs no image. */
.device {
  position: relative;
  width: min(300px, 78vw);
  margin-inline: auto;
  border: 9px solid #1b1f24;
  border-radius: 34px;
  box-shadow: var(--shadow-lift);
  overflow: hidden;
  background: #1b1f24;
}

.device img {
  border-radius: 25px;
  display: block;
}

/* --- Sections ----------------------------------------------------------- */

.section {
  padding-block: clamp(3rem, 8vw, 5.5rem);
}

.section-sunken {
  background: var(--bg-sunken);
  border-block: 1px solid var(--border);
}

.section h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.1rem);
  letter-spacing: -0.022em;
  line-height: 1.2;
  margin: 0 0 0.75rem;
  font-weight: 670;
}

.section-intro {
  color: var(--text-dim);
  max-width: 58ch;
  margin: 0 0 clamp(2rem, 4vw, 3rem);
}

/* --- Feature grid ------------------------------------------------------- */

.features {
  display: grid;
  gap: 1.15rem;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.45rem;
}

.feature h3 {
  margin: 0 0 0.45rem;
  font-size: 1.03rem;
  font-weight: 620;
  letter-spacing: -0.008em;
}

.feature p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.94rem;
  line-height: 1.6;
}

/* --- Numbered steps ----------------------------------------------------- */

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.6rem;
  max-width: var(--measure);
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 1rem;
  align-items: start;
}

.steps li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent-quiet);
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 640;
  font-variant-numeric: tabular-nums;
}

.steps h3 {
  margin: 0.15rem 0 0.3rem;
  font-size: 1.02rem;
  font-weight: 615;
}

.steps p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* --- Screenshot strip --------------------------------------------------- */

/* A row that scrolls rather than a grid that stacks. These are phone
 * screenshots: at one per row on a phone they are taller than the viewport and
 * turn the page into eight thousand pixels of scrolling. Bleeding to the screen
 * edge is what says the row moves. */
.shots {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: min(230px, 62vw);
  gap: 1.15rem;
  list-style: none;
  margin: 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  padding-block: 0 1.1rem;
  margin-inline: calc(-1 * clamp(1.25rem, 4vw, 2.5rem));
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.shot {
  scroll-snap-align: start;
}

.shot figure {
  margin: 0;
}

.shot img {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--bg-raised);
}

.shot figcaption {
  margin-top: 0.7rem;
  font-size: 0.86rem;
  color: var(--text-faint);
}

/* --- Prose (the guide and the policy) ----------------------------------- */

.doc {
  padding-block: clamp(2.5rem, 6vw, 4rem);
}

.doc-layout {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  grid-template-columns: 1fr;
  align-items: start;
}

@media (min-width: 1000px) {
  .doc-layout {
    grid-template-columns: 220px minmax(0, 1fr);
  }
}

.toc {
  position: sticky;
  top: 84px;
  font-size: 0.9rem;
  border-left: 1px solid var(--border);
  padding-left: 1rem;
}

@media (max-width: 999px) {
  .toc {
    position: static;
    border-left: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.15rem;
    background: var(--bg-sunken);
  }
}

.toc p {
  margin: 0 0 0.6rem;
  font-size: 0.76rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-faint);
  font-weight: 620;
}

.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.42rem;
}

.toc a {
  color: var(--text-dim);
  text-decoration: none;
  display: block;
  line-height: 1.35;
}

.toc a:hover {
  color: var(--accent);
}

.content {
  max-width: var(--measure);
}

.content h1 {
  font-size: clamp(2rem, 5vw, 2.7rem);
  letter-spacing: -0.028em;
  line-height: 1.12;
  margin: 0 0 0.6rem;
  font-weight: 700;
}

.content h2 {
  font-size: 1.45rem;
  letter-spacing: -0.018em;
  margin: 2.75rem 0 0.85rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
  font-weight: 650;
  scroll-margin-top: 80px;
}

.content h3 {
  font-size: 1.1rem;
  margin: 1.9rem 0 0.55rem;
  font-weight: 620;
  scroll-margin-top: 80px;
}

.content h4 {
  font-size: 0.98rem;
  margin: 1.5rem 0 0.4rem;
  font-weight: 620;
  color: var(--text-dim);
}

.content p,
.content li {
  color: var(--text);
}

.content p {
  margin: 0 0 1.1rem;
}

.content ul,
.content ol {
  margin: 0 0 1.2rem;
  padding-left: 1.35rem;
}

.content li {
  margin-bottom: 0.4rem;
}

.content li::marker {
  color: var(--text-faint);
}

.content strong {
  font-weight: 640;
}

.content code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.1em 0.36em;
  white-space: nowrap;
}

.content pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1.3rem;
  line-height: 1.55;
}

.content pre code {
  background: none;
  border: 0;
  padding: 0;
  white-space: pre;
  font-size: 0.87em;
}

.content blockquote {
  margin: 0 0 1.3rem;
  padding: 0.9rem 1.15rem;
  border-left: 3px solid var(--accent);
  background: var(--bg-sunken);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-dim);
}

.content blockquote p:last-child {
  margin-bottom: 0;
}

.content hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

/* Wide content scrolls inside its own box; the page never does. */
.table-scroll {
  overflow-x: auto;
  margin: 0 0 1.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.content table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
}

.content th,
.content td {
  text-align: left;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.content th {
  background: var(--bg-sunken);
  font-weight: 620;
  white-space: nowrap;
}

.content tbody tr:last-child td {
  border-bottom: 0;
}

/* --- Callout ------------------------------------------------------------ */

.callout {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.5rem;
  margin: 2rem 0;
}

.callout h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 630;
}

.callout p:last-child {
  margin-bottom: 0;
}

/* --- Footer ------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-sunken);
  padding-block: 2.75rem 3.25rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem 3rem;
  align-items: start;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
}

.disclaimer {
  max-width: 62ch;
  margin: 1.75rem 0 0;
  font-size: 0.84rem;
  color: var(--text-faint);
  line-height: 1.55;
}