/* Voicepad site.css: one stylesheet for the homepage, guides and articles.
   Layers: 1 tokens, 2 base, 3 layout and margin timeline, 4 prose, 5 components, 6 tool skin, 7 motion. */

/* ==== 1. Tokens ==== */

/* Self-hosted subsets: Basic Latin, Latin-1 punctuation, Cyrillic, typographic punctuation, arrows, № and ₽ in one file per face. */
@font-face {
  font-family: "Literata";
  src: url("fonts/literata.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 650;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/plex-mono-400.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/plex-mono-500.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

/* Metric-matched fallbacks: system fonts resized to Literata and IBM Plex Mono metrics so the webfont swap does not shift layout. */
@font-face {
  font-family: "Literata Fallback";
  src: local("Georgia"), local("Georgia Regular");
  font-weight: 400 500;
  size-adjust: 108.5%;
  ascent-override: 108.4%;
  descent-override: 28.4%;
  line-gap-override: 0%;
}
@font-face {
  font-family: "Literata Fallback";
  src: local("Georgia Bold"), local("Georgia-Bold");
  font-weight: 600 700;
  size-adjust: 96.4%;
  ascent-override: 122.1%;
  descent-override: 31.9%;
  line-gap-override: 0%;
}
@font-face {
  font-family: "Plex Mono Fallback";
  src: local("Menlo Regular"), local("Menlo-Regular"), local("Courier New"), local("CourierNewPSMT");
  size-adjust: 99.7%;
  ascent-override: 102.8%;
  descent-override: 27.6%;
  line-gap-override: 0%;
}
@font-face {
  font-family: "Plex Mono Fallback Win";
  src: local("Consolas");
  size-adjust: 109.1%;
  ascent-override: 93.9%;
  descent-override: 25.2%;
  line-gap-override: 0%;
}

:root {
  --paper: #f3eee4;
  --sheet: #fbf8f1;
  --ink: #1d1a16;
  --muted: #5e5649;
  --faint: #776d5e;
  --rule: #d8cfbf;
  --accent: #c0391b;
  --accent-text: #a5311a;
  --focus: #c0391b;
  --on-accent: #ffffff;
  --wash: #f6e1d7;
  --serif: "Literata", "Literata Fallback", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", "Plex Mono Fallback", "Plex Mono Fallback Win", ui-monospace, Menlo, Consolas, monospace;
  --gutter: 16px;
  --margin: 0rem;
  --pad: 0.875rem;
  --measure: 38em;
  --col-top: 2.75rem;
  --h2-line: 2.1rem;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #191713;
    --sheet: #221f1a;
    --ink: #eee7da;
    --muted: #aba191;
    --faint: #958b7b;
    --rule: #3a342b;
    --accent: #ff6e4e;
    --accent-text: #ff8a6e;
    --focus: #ff6e4e;
    --on-accent: #191713;
    --wash: #3b2119;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #191713;
  --sheet: #221f1a;
  --ink: #eee7da;
  --muted: #aba191;
  --faint: #958b7b;
  --rule: #3a342b;
  --accent: #ff6e4e;
  --accent-text: #ff8a6e;
  --focus: #ff6e4e;
  --on-accent: #191713;
  --wash: #3b2119;
  color-scheme: dark;
}

/* The ink sheet re-declares the tokens, so any component inside it renders inverted. */
.sheet-ink {
  --paper: #1d1a16;
  --sheet: #27231d;
  --ink: #f3eee4;
  --muted: #bdb3a2;
  --faint: #a39888;
  --rule: #433c32;
  --accent: #ff6e4e;
  --accent-text: #ff8a6e;
  --focus: #ff6e4e;
  --on-accent: #1d1a16;
  --wash: #45271c;
  color-scheme: dark;
  background: var(--paper);
  color: var(--ink);
}

/* On a dark page the band is raised, not sunk: a darker band would vanish against #191713. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .sheet-ink { --paper: #2c2720; --sheet: #36302a; --rule: #4d453a; --wash: #4a2c21; }
}

:root[data-theme="dark"] .sheet-ink { --paper: #2c2720; --sheet: #36302a; --rule: #4d453a; --wash: #4a2c21; }

@media (min-width: 760px) {
  :root { --gutter: 32px; }
}

@media (min-width: 900px) {
  :root { --margin: 9rem; --pad: 2.5rem; --col-top: 4.5rem; --h2-line: 2.75rem; }
}

/* ==== 2. Base ==== */

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

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--serif);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

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

::selection { background: var(--accent); color: var(--on-accent); }

img, svg { display: block; }

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

h1, h2, h3, h4 { margin: 0; font-weight: 500; line-height: 1.1; text-wrap: balance; }

p { margin: 0 0 1em; }

b, strong { font-weight: 600; }

code, kbd {
  font: 500 0.875em/1 var(--mono);
  padding: 0.1em 0.3em;
  border: 1px solid var(--rule);
  border-radius: 2px;
  white-space: nowrap;
}

sup { line-height: 0; }

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font: 500 0.875rem var(--mono);
}

.skip:focus { top: 1rem; }

.tc {
  font: 500 0.75rem/1 var(--mono);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

/* ==== 3. Layout and the margin timeline ==== */

/* Rule: the red spine is the left edge of .col. A dot on the spine marks the start (hero), each chapter, and the stop (footer).
   Chapter numbers come from a CSS counter, so they always equal the order of .chapter sections; prose h2 are numbered the same way. */

.shell {
  max-width: 75rem;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.col {
  position: relative;
  margin-left: var(--margin);
  padding-left: var(--pad);
  border-left: 1px solid var(--accent);
}

main { counter-reset: chapter; }

.chapter { counter-increment: chapter; }

.chapter > .shell { border-top: 1px solid var(--ink); }

.chapter > .shell > .col {
  padding-top: var(--col-top);
  padding-bottom: 3.25rem;
}

.chapter > .shell > .col::before,
.prose h2::before {
  content: counter(chapter, decimal-leading-zero);
  content: counter(chapter, decimal-leading-zero) / "";
  display: block;
  margin: 0 0 0.9rem;
  font: 500 0.75rem/1 var(--mono);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--accent-text);
}

.prose h2::before {
  content: counter(section, decimal-leading-zero);
  content: counter(section, decimal-leading-zero) / "";
  margin-bottom: 0.6rem;
}

.chapter > .shell > .col::after,
.prose h2::after {
  content: "";
  position: absolute;
  left: -4px;
  top: calc(var(--col-top) + 0.375rem + -3.5px);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.prose h2::after {
  left: calc(-1 * var(--pad) + -4px);
  top: calc(0.375rem + -3.5px);
}

@media (min-width: 900px) {
  .chapter > .shell > .col { padding-bottom: 5rem; }
  .chapter > .shell > .col::before,
  .prose h2::before {
    position: absolute;
    right: 100%;
    top: var(--col-top);
    display: flex;
    align-items: center;
    height: var(--h2-line);
    margin: 0 1.5rem 0 0;
  }
  .prose h2::before {
    top: 0;
    right: calc(100% + var(--pad) + 1.5rem);
    height: calc(var(--prose-h2) * 1.1);
  }
  .chapter > .shell > .col::after { top: calc(var(--col-top) + var(--h2-line) / 2 + -3.5px); }
  .prose h2::after { top: calc(0.5lh + -3.5px); }
}

/* Masthead */

.masthead .shell { border-bottom: 3px double var(--ink); }

.masthead__row {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  column-gap: 0.75rem;
  min-height: 4.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 44px;
  font: 600 1.25rem/1 var(--serif);
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
}

.brand:hover { color: var(--ink); }

.mark-dot { fill: var(--accent); }
.mark-lines { stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; fill: none; }

.masthead__aside {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.lang {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  font: 500 0.8125rem/1 var(--mono);
  letter-spacing: 0.06em;
  text-decoration: none;
}

.chapters { display: none; }

@media (max-width: 399px) {
  .masthead__aside .lang { display: none; }
  .masthead__aside .btn { padding-inline: 0.8rem; }
}

.chapters ol {
  display: flex;
  flex-wrap: wrap;
  column-gap: 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chapters a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 44px;
  font: 400 0.875rem/1 var(--serif);
  text-decoration: none;
  white-space: nowrap;
}

.chapters a:hover { text-decoration: underline; text-decoration-color: var(--accent); }

@media (min-width: 760px) {
  .masthead__row { flex-wrap: wrap; }
  .chapters { display: block; order: 3; flex-basis: 100%; border-top: 1px solid var(--rule); }
  .chapters ol { flex-wrap: nowrap; column-gap: 0.85rem; }
  .chapters a { gap: 0.35rem; font-size: 0.8125rem; }
}

@media (min-width: 900px) {
  .brand {
    position: absolute;
    left: calc(-1 * var(--margin));
    top: 2.125rem;
    transform: translateY(-50%);
  }
}

@media (min-width: 1200px) {
  .chapters { order: 0; flex-basis: auto; border: 0; }
  .chapters ol { column-gap: 1rem; }
  .chapters a { gap: 0.45rem; font-size: 0.875rem; }
  .masthead__row { flex-wrap: nowrap; }
}

/* Hero */

.hero .col {
  padding-top: 1.75rem;
  padding-bottom: 3rem;
}

/* .page-head opens its .col with the same top padding as the hero, so the start dot can be positioned against the .col. */
.hero .col::after,
.page-head::after {
  content: "";
  position: absolute;
  left: -6px;
  top: calc(1.75rem + 0.26rem);
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--accent);
}

@media (min-width: 900px) {
  .hero .col { padding-top: 2.75rem; padding-bottom: 4.5rem; }
  .hero .col::after,
  .page-head::after { top: calc(2.75rem + 0.26rem); }
}

.slug {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: 0.6rem;
  margin: 0 0 1rem;
  font: 500 0.75rem/1.6 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.slug span + span::before {
  content: "\00b7";
  content: "\00b7" / "";
  margin-right: 0.6rem;
}

@media (max-width: 479px) {
  .slug { flex-direction: column; align-items: flex-start; }
  .slug span + span::before { display: none; }
}

h1 {
  max-width: 15em;
  font-size: clamp(2rem, 1.2rem + 3.6vw, 3.5rem);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -0.022em;
}

/* Hyphenate only words too long for a phone line (e.g. «конфиденциальности»); shorter words still wrap whole. */
@media (max-width: 479px) {
  h1 {
    -webkit-hyphens: auto;
    hyphens: auto;
    hyphenate-limit-chars: 13 6 6;
    -webkit-hyphenate-limit-before: 6;
    -webkit-hyphenate-limit-after: 6;
  }
}

.h1__tail {
  display: block;
  margin-top: 0.3em;
  font-size: 0.62em;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--muted);
}

.lead {
  max-width: 36em;
  margin: 1.1rem 0 0;
  font-size: clamp(1.0625rem, 0.95rem + 0.4vw, 1.25rem);
  line-height: 1.5;
}

/* Compound selector: .cta-pair, declared later, resets margins. */
.hero__bot,
.cta-pair.hero__bot { margin-top: 1.25rem; }

.hero__grid {
  display: grid;
  gap: 2.5rem;
  margin-top: 1.75rem;
}

@media (min-width: 1000px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr);
    align-items: start;
    margin-top: 2.25rem;
  }
}

/* Chapter text */

h2 {
  max-width: 20em;
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
}

.intro {
  max-width: 34em;
  margin-bottom: 0;
  font-size: clamp(1.0625rem, 1rem + 0.3vw, 1.1875rem);
  line-height: 1.55;
  color: var(--muted);
}

/* Outro and colophon */

.outro .shell { border-top: 1px solid var(--ink); }

.outro .col { padding-top: 2.75rem; padding-bottom: 3.25rem; }

.outro h2 { margin-bottom: 0.6rem; }

.outro p { max-width: 34em; color: var(--muted); }

.outro .cta-pair { margin-top: 1.5rem; }

@media (min-width: 900px) {
  .outro .col { padding-top: 4rem; padding-bottom: 4.5rem; }
}

.colophon .shell { border-top: 3px double var(--ink); }

.colophon .col { padding-top: 2.5rem; padding-bottom: 3.5rem; }

.colophon .col::after {
  content: "";
  position: absolute;
  left: -5px;
  top: calc(2.5rem + 0.55rem);
  width: 9px;
  height: 9px;
  border-radius: 1px;
  background: var(--accent);
}

.colophon__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.6rem;
  margin: 0 0 1rem;
}

.colophon__brand strong { font-size: 1.25rem; font-weight: 600; }

.colophon__brand span { flex-basis: 100%; color: var(--muted); }

@media (min-width: 760px) {
  .colophon__brand span { flex-basis: auto; margin-left: 0.5rem; }
}

.colophon__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.5rem;
  margin: 0 0 1.25rem;
  padding: 0;
  list-style: none;
}

.colophon__links a { display: inline-flex; align-items: center; min-height: 44px; }

.colophon__note {
  margin: 0 0 1rem;
  font: 400 0.75rem/1.6 var(--mono);
  color: var(--muted);
}

.colophon__en {
  max-width: 44em;
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--muted);
}

.colophon__en strong { color: var(--ink); }

/* Article header for guides: breadcrumbs, title, meta line */

.page-head { padding-top: 1.75rem; padding-bottom: 2rem; }

@media (min-width: 900px) {
  .page-head { padding-top: 2.75rem; padding-bottom: 3rem; }
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
  font: 500 0.75rem/1.6 var(--mono);
  letter-spacing: 0.04em;
  color: var(--muted);
}

.crumbs li + li::before {
  content: "/";
  content: "/" / "";
  margin: 0 0.5em;
  color: var(--faint);
}

.crumbs a { text-decoration-color: var(--rule); }

.page-meta {
  margin: 1rem 0 0;
  font: 400 0.8125rem/1.5 var(--mono);
  color: var(--muted);
}

/* Each item carries its separator on the left; the clipped strip hides the one that starts a wrapped line. */
.page-meta-list {
  display: flex;
  flex-wrap: wrap;
  margin-left: -1.5em;
  clip-path: inset(0 0 0 1.5em);
}

.page-meta-list > span { white-space: nowrap; }

.page-meta-list > span::before {
  content: "\00b7";
  content: "\00b7" / "";
  display: inline-block;
  width: 1.5em;
  text-align: center;
}

/* ==== 4. Prose: plain elements inside an article container, no page CSS needed ==== */

.prose {
  max-width: 46rem;
  padding-bottom: 3rem;
  counter-reset: section;
}

.prose > :first-child { margin-top: 0; }

.prose p,
.prose ul,
.prose ol,
.prose dl,
.prose blockquote { max-width: var(--measure); }

.prose p { margin: 0 0 1em; }

.prose h2 {
  --prose-h2: clamp(1.5rem, 1.15rem + 1.5vw, 2.125rem);
  position: relative;
  counter-increment: section;
  margin: 2.6rem 0 0.9rem;
  font-size: var(--prose-h2);
  line-height: 1.1;
}

.prose h3 {
  margin: 2rem 0 0.6rem;
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.25;
}

.prose h4 {
  margin: 1.5rem 0 0.4rem;
  font: 500 0.75rem/1.4 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.prose ul,
.prose ol { margin: 0 0 1.1em; padding-left: 1.6rem; }

.prose li + li { margin-top: 0.4em; }

.prose ul { list-style: none; }

.prose ul > li { position: relative; }

.prose ul > li::before {
  content: "";
  position: absolute;
  left: -1.2rem;
  top: 0.68em;
  width: 5px;
  height: 5px;
  background: var(--accent);
}

.prose ol > li::marker {
  font: 500 0.8125rem var(--mono);
  color: var(--accent-text);
}

.prose dl { margin: 0 0 1.25em; }

.prose dt { font: 500 0.8125rem/1.5 var(--mono); color: var(--muted); }

.prose dd { margin: 0.15rem 0 0.75rem; }

.prose blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 0 0.25rem 1.1rem;
  border-left: 3px solid var(--accent);
  font-size: 1.125rem;
  line-height: 1.55;
}

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

.prose pre {
  margin: 1.25rem 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  background: var(--sheet);
  border: 1px solid var(--rule);
  font: 400 0.875rem/1.6 var(--mono);
}

.prose pre code { padding: 0; border: 0; font: inherit; white-space: pre; }

.prose figure { margin: 2rem 0; }

.prose figure img { border: 1px solid var(--rule); background: var(--sheet); }

.prose figcaption,
.prose .note {
  margin-top: 0.6rem;
  font: 400 0.8125rem/1.55 var(--mono);
  color: var(--muted);
}

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

.prose table,
.book {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9688rem;
  line-height: 1.45;
}

.prose table { margin: 1.5rem 0; }

.prose thead tr:first-child,
.book thead tr { border-top: 2px solid var(--ink); }

.prose table:not(:has(thead)) tr:first-child { border-top: 2px solid var(--ink); }

.prose th,
.book th {
  padding: 0.6rem 0.75rem 0.5rem 0;
  border-bottom: 1px solid var(--ink);
  font: 500 0.75rem/1.3 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: left;
  color: var(--muted);
  vertical-align: bottom;
}

.prose td,
.book td,
.book tbody th {
  padding: 0.6rem 0.75rem 0.6rem 0;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}

.prose tr:last-child td,
.book tbody tr:last-child td,
.book tbody tr:last-child th { border-bottom: 2px solid var(--ink); }

@media (max-width: 759px) {
  .prose table { display: block; max-width: 100%; overflow-x: auto; }
}

.prose details {
  max-width: var(--measure);
  border-bottom: 1px solid var(--rule);
}

.prose details:first-of-type { border-top: 1px solid var(--ink); }

.prose summary {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  min-height: 44px;
  padding: 0.75rem 0;
  font-weight: 600;
  line-height: 1.35;
  list-style: none;
  cursor: pointer;
}

.prose summary::-webkit-details-marker { display: none; }

.prose summary::after {
  content: "+";
  content: "+" / "";
  flex: none;
  font: 500 1rem/1.35 var(--mono);
  color: var(--accent-text);
}

.prose details[open] summary::after { content: "\2212"; content: "\2212" / ""; }

.prose details p { color: var(--ink); }

/* ==== 5. Components ==== */

/* Buttons and the CTA pair */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.55rem 1.05rem;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--ink);
  color: var(--paper);
  font: 600 0.9375rem/1.2 var(--serif);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}

.btn:hover { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

.btn-line { background: transparent; color: var(--ink); }

.btn-line:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.cta-pair {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.625rem;
  margin: 0;
}

.prose .cta-pair { margin: 1.5rem 0; }

.wide-only { display: none; }

@media (min-width: 480px) {
  .wide-only { display: inline; }
}

/* Callout and fine print */

.callout {
  max-width: 44rem;
  margin: 2rem 0 0;
  padding: 0.85rem 1rem 0.9rem 1.1rem;
  border-left: 3px solid var(--accent);
  background: var(--sheet);
  font-size: 0.9688rem;
  line-height: 1.55;
}

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

.note { font-size: 0.875rem; color: var(--muted); }

.ref {
  display: inline-block;
  margin: -0.6em -0.3em -0.6em -0.1em;
  padding: 0.6em 0.3em 0.6em 0.15em;
  font: 500 0.75em/1 var(--mono);
  color: var(--accent-text);
  text-decoration: none;
}

.ref:hover { color: var(--ink); }

/* Tool desk: the ink header around #vp-tool */

.desk { scroll-margin-top: 1rem; }

.desk__head {
  padding: 0.75rem 1rem 0.8rem;
  background: var(--ink);
  color: var(--paper);
}

.desk__head h2 {
  max-width: none;
  margin: 0;
  font: 500 0.75rem/1.3 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.desk__head p {
  margin: 0.35rem 0 0;
  font-size: 0.875rem;
  line-height: 1.4;
  opacity: 0.82;
  text-wrap: balance;
}

/* An inverted head would turn into the brightest slab on a dark page, so dark mode keeps it a raised dark band. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .desk__head { border: 1px solid var(--ink); background: #2c2720; color: var(--ink); }
}

:root[data-theme="dark"] .desk__head { border: 1px solid var(--ink); background: #2c2720; color: var(--ink); }

/* Sample transcript card */

.sample {
  container-type: inline-size;
  margin: 0;
  padding: 1rem 1.25rem 1.25rem;
  background: var(--sheet);
  border: 1px solid var(--rule);
}

.sample__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--ink);
  font: 500 0.75rem/1.4 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.sample__meta span:first-child { color: var(--ink); }

.player {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule);
}

.player svg { width: 100%; height: auto; }

.player__now { color: var(--accent-text); }

.w-played, .w-rest { stroke-width: 2; stroke-linecap: round; fill: none; }
.w-played { stroke: var(--ink); }
.w-rest { stroke: var(--faint); opacity: 0.45; }
.w-head { stroke: var(--accent); stroke-width: 1.5; }

.tr-head {
  display: none;
  padding: 0.55rem 0 0.4rem;
  font: 500 0.75rem/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.tr { margin: 0; padding: 0.25rem 0 0.5rem; list-style: none; counter-reset: ln; }

.tr li, .vp-text p {
  position: relative;
  margin: 0;
  padding: 0.4rem 0.5rem 0.4rem 4.25rem;
  font-size: 1rem;
  line-height: 1.6;
  counter-increment: ln;
}

.tr li::before, .vp-text p::before {
  content: counter(ln);
  content: counter(ln) / "";
  position: absolute;
  left: 0;
  top: 0.4rem;
  width: 1.4rem;
  display: none;
  text-align: right;
  font: 400 0.75rem/1.6rem var(--mono);
  color: var(--faint);
}

.tm, .vp-time {
  position: absolute;
  left: 0.5rem;
  top: 0.4rem;
  font: 400 0.8125rem/1.6rem var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.spk, .vp-speaker {
  margin-right: 0.45em;
  font-weight: 650;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.07em;
  color: var(--ink);
}

@container (min-width: 24rem) {
  .tr-head { display: grid; grid-template-columns: 2.2rem 4.05rem 1fr; }
  .tr li, .vp-text p { padding-left: 6.25rem; }
  .tr li::before, .vp-text p::before { display: block; }
  .tm, .vp-time { left: 2.2rem; }
}

.tr li { transition: background-color 0.25s ease; }

.tr li.now { background: var(--wash); }
.tr li.now .tm { color: var(--accent-text); font-weight: 500; }

.keys {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 0.75rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
}

.keys__label {
  flex-basis: 100%;
  font: 500 0.75rem/1.2 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.keys__list {
  display: flex;
  flex-wrap: wrap;
  row-gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font: 500 0.8125rem/1.4 var(--mono);
  color: var(--ink);
}

.keys__list li:not(:last-child)::after {
  content: "\00b7";
  content: "\00b7" / "";
  margin: 0 0.55em;
  color: var(--faint);
}

.keys__more {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 0.9375rem;
}

.keys__more::after { content: "\2193"; content: "\2193" / ""; margin-left: 0.4em; font-family: var(--mono); color: var(--accent-text); }

/* Input, engine, output diagram */

.flow {
  display: grid;
  gap: 2.75rem;
  margin-top: 2.25rem;
}

.flow__label {
  margin: 0 0 0.6rem;
  font: 500 0.75rem/1.3 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.ports {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink);
}

.ports li {
  position: relative;
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  min-height: 4.25rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule);
}

.port__id {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font: 500 0.75rem/1 var(--mono);
  color: var(--muted);
  white-space: nowrap;
}

.port__id::before {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  border: 1px solid var(--ink);
  border-radius: 50%;
}

.flow__out .port__id::before { background: var(--accent); border-color: var(--accent); }

.port__name { font-weight: 600; line-height: 1.3; }

.port__name small {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--muted);
}

.where { display: flex; flex-direction: column; align-items: flex-end; gap: 0.25rem; }

.where b {
  padding: 0.3rem 0.4rem;
  border: 1px solid var(--ink);
  border-radius: 2px;
  font: 500 0.75rem/1 var(--mono);
}

.flow__core {
  position: relative;
  align-self: center;
  padding: 1rem 1.1rem 0.4rem;
  border: 3px double var(--ink);
  background: var(--sheet);
}

.flow__engine { margin: 0 0 0.75rem; font-size: 1.375rem; font-weight: 500; line-height: 1.15; }

.flow__specs { margin: 0; }

.flow__specs div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
}

.flow__specs dt { font: 500 0.75rem/1.4 var(--mono); color: var(--muted); }

.flow__specs dd { margin: 0; text-align: right; }

.flow__core::before,
.flow__core::after {
  content: "";
  position: absolute;
  left: 50%;
  height: 2.75rem;
  border-left: 1px solid var(--ink);
}

.flow__core::before { bottom: calc(100% + 3px); }
.flow__core::after { top: calc(100% + 3px); }

/* Three columns only from 1200px: below that the side columns leave port names under 100px. */
@media (min-width: 1200px) {
  .flow {
    grid-template-columns: minmax(0, 1fr) 14rem minmax(0, 1fr);
    column-gap: 3rem;
    align-items: start;
  }
  .flow__core::before,
  .flow__core::after { top: 50%; bottom: auto; left: auto; width: 1.5rem; height: 0; border-left: 0; border-top: 1px solid var(--ink); }
  .flow__core::before { right: calc(100% + 3px); }
  .flow__core::after { left: calc(100% + 3px); }
  .flow__in .ports li::before,
  .flow__out .ports li::before { content: ""; position: absolute; top: 0; bottom: 0; border-left: 1px solid var(--ink); }
  .flow__in .ports li::before { left: calc(100% + 1.5rem); }
  .flow__out .ports li::before { right: calc(100% + 1.5rem); }
  .flow .ports li:first-child::before { top: 50%; }
  .flow .ports li:last-child::before { bottom: 50%; }
  .flow__in .ports li::after,
  .flow__out .ports li::after { content: ""; position: absolute; top: 50%; width: 1.5rem; border-top: 1px solid var(--ink); }
  .flow__in .ports li::after { left: 100%; }
  .flow__out .ports li::after { right: 100%; }
}

/* Bot outputs spread */

.spread { display: grid; margin-top: 2.25rem; }

@media (min-width: 1000px) {
  .spread { grid-template-columns: 1fr 1fr; }
  .spread .page:first-child { padding-right: 2.5rem; border-right: 1px solid var(--rule); }
  .spread .page + .page { padding-left: 2.5rem; }
}

.out { padding: 1.4rem 0 1.6rem; border-top: 1px solid var(--rule); }

.page:first-child .out:first-child { border-top-color: var(--ink); }

@media (min-width: 1000px) {
  .page .out:first-child { border-top-color: var(--ink); }
}

.key {
  display: inline-block;
  margin-bottom: 0.9rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--ink);
  border-bottom-width: 2px;
  border-radius: 3px;
  font: 500 0.75rem/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.out p { margin: 0 0 0.6rem; max-width: 34em; }

.ticks { margin: 0; padding: 0; list-style: none; }

.ticks li { position: relative; padding: 0.2rem 0 0.2rem 1.4rem; }

.ticks li::before {
  content: "";
  position: absolute;
  left: 0.1rem;
  top: 0.82em;
  width: 5px;
  height: 5px;
  background: var(--accent);
}

.qa p { margin: 0 0 0.45rem; }

.qa b, .chat__who {
  margin-right: 0.35em;
  font-weight: 650;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.07em;
}

.toc { margin: 0.5rem 0 0; padding: 0; list-style: none; }

.toc li {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.35rem 0;
  border-bottom: 1px dotted var(--rule);
}

.toc .tc { color: var(--accent-text); }

/* Venues comparison: a real table on wide screens, labelled rows on phones; explicit ARIA roles keep the semantics */

.venues { margin-top: 2.25rem; }

.venues tbody th {
  font: 600 1rem/1.35 var(--serif);
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink);
}

@media (min-width: 1100px) {
  .venues th:first-child { width: 15%; }
  .venues tbody th, .venues td { padding-top: 0.9rem; padding-bottom: 0.9rem; }
}

@media (max-width: 1099px) {
  .venues thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); }
  .venues, .venues tbody, .venues tr, .venues td, .venues tbody th { display: block; width: 100%; }
  .venues tr { padding: 0 0 0.25rem; border-top: 2px solid var(--ink); }
  .venues tr + tr { margin-top: 1.5rem; }
  .venues tbody th { padding: 0.75rem 0 0.5rem; border-bottom: 1px solid var(--rule); font-size: 1.125rem; }
  .venues td {
    display: grid;
    grid-template-columns: 6.75rem minmax(0, 1fr);
    gap: 0.75rem;
    padding: 0.55rem 0;
  }
  .venues td::before {
    content: attr(data-label);
    content: attr(data-label) / "";
    font: 500 0.75rem/1.6rem var(--mono);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .venues tbody tr:last-child td, .venues tbody tr:last-child th { border-bottom: 1px solid var(--rule); }
  .venues tbody tr:last-child td:last-child { border-bottom: 2px solid var(--ink); }
}

/* Numbered steps */

.split { margin-top: 3rem; }

.split__title { margin: 0 0 1.1rem; font-size: 1.5rem; }

.steps {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  min-height: 2.25rem;
  padding: 0.3rem 0 0 3.1rem;
  counter-increment: step;
  line-height: 1.5;
}

.steps li::before {
  content: counter(step);
  content: counter(step) / "";
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border: 1px solid var(--ink);
  border-bottom-width: 2px;
  border-radius: 3px;
  background: var(--sheet);
  font: 500 0.9375rem/1 var(--mono);
}

@media (min-width: 760px) {
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; }
  .steps li { padding: 3.1rem 0 0; }
}

/* Definition rows */

.defs { margin: 0; }

.defs > div {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule);
}

.defs > div:first-child { border-top: 1px solid var(--ink); }

.defs dt {
  padding-top: 0.2rem;
  font: 500 0.75rem/1.6 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.defs dd { margin: 0; line-height: 1.5; }

/* A 6.5rem label column leaves phone values a ribbon about 200px wide, so phones stack the label above the value. */
@media (max-width: 479px) {
  .defs > div { grid-template-columns: minmax(0, 1fr); gap: 0.2rem; }
}

/* Group chat */

.sheet-ink.chapter > .shell,
.sheet-ink + .chapter > .shell { border-top-color: transparent; }

.group {
  display: grid;
  gap: 2.5rem;
  margin-top: 2.25rem;
}

@media (min-width: 900px) {
  .group { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 3rem; align-items: start; }
}

.group .cta-pair { margin-top: 1.5rem; }

.chat {
  margin: 0;
  background: var(--sheet);
  border: 1px solid var(--rule);
}

.chat__head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--rule);
  font: 500 0.75rem/1.3 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.chat__head span:first-child { color: var(--ink); }

.chat__service {
  margin: 0;
  padding: 0.8rem 1rem 0.5rem;
  text-align: center;
  font: 400 0.75rem/1.4 var(--mono);
  color: var(--muted);
}

.chat__line {
  display: grid;
  grid-template-columns: 5.25rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: center;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--rule);
}

.chat__line p { margin: 0; line-height: 1.5; }

.chat__line-bot { align-items: start; }

.chat__line-bot .chat__who { padding-top: 0.1rem; color: var(--accent-text); }

.chat__who { margin: 0; white-space: nowrap; overflow-wrap: normal; }

.chat__quote {
  margin: 0 0 0.3rem;
  padding-left: 0.6rem;
  border-left: 2px solid var(--accent);
  font: 400 0.75rem/1.5 var(--mono);
  color: var(--muted);
}

.voice {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  justify-self: start;
  padding: 0.3rem 0.75rem 0.3rem 0.3rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper);
}

.voice__play circle { fill: var(--ink); }
.voice__play path { fill: var(--paper); }
.voice__wave { width: 6.5rem; height: auto; }
.voice__wave-short { width: 3.6rem; }

/* On phones the sender sits above the message, as in Telegram, so a long name never squeezes the column. */
@media (max-width: 479px) {
  .chat__line { grid-template-columns: minmax(0, 1fr); gap: 0.3rem; padding-inline: 0.85rem; }
  .chat__line-bot .chat__who { padding-top: 0; }
}

@media (max-width: 359px) {
  .voice__wave { width: 4.5rem; }
}
.voice__wave path { stroke: var(--ink); stroke-width: 2; stroke-linecap: round; fill: none; }

.chat figcaption {
  padding: 0.7rem 1rem 0.9rem;
  font-size: 0.875rem;
  color: var(--muted);
}

/* Ratecard with price per minute bars */

.ratecard {
  max-width: 54rem;
  margin-top: 2.25rem;
  padding: 1.1rem 1.1rem 1.25rem;
  border: 3px double var(--ink);
  background: var(--sheet);
}

@media (min-width: 760px) {
  .ratecard { padding: 1.5rem 1.75rem 1.6rem; }
}

.ratecard__head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--ink);
  font: 500 0.75rem/1.3 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.ratecard__head span:first-child { color: var(--ink); }

.rates { --per-max: 3.32; margin: 0; padding: 0; list-style: none; }

.rate {
  display: grid;
  grid-template-columns: auto minmax(1rem, 1fr) auto;
  align-items: baseline;
  column-gap: 0.5rem;
  padding: 0.95rem 0 0.9rem;
  border-bottom: 1px solid var(--rule);
}

.rate__name { font-size: 1.125rem; font-weight: 500; }

.rate__big {
  font-size: clamp(2.75rem, 2rem + 3vw, 3.75rem);
  font-weight: 500;
  line-height: 0.9;
  letter-spacing: -0.03em;
  font-variant-numeric: lining-nums;
}

.rate__lead { align-self: baseline; height: 0; border-bottom: 2px dotted var(--faint); transform: translateY(-0.3em); }

.rate__price {
  font-size: 1.375rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums lining-nums;
  text-align: right;
  white-space: nowrap;
}

.rate__note {
  grid-column: 1 / -1;
  margin-top: 0.25rem;
  font: 400 0.8125rem/1.6 var(--mono);
  color: var(--muted);
}

.rate__bar {
  grid-column: 1 / -1;
  width: calc(var(--per) / var(--per-max) * 100%);
  height: 6px;
  margin-top: 0.5rem;
  background: repeating-linear-gradient(90deg, var(--ink) 0 4px, transparent 4px 6px);
}

@media (min-width: 900px) {
  .rate { grid-template-columns: auto minmax(1rem, 1fr) 6.5rem 18.5rem; }
  .rate__note { grid-column: 4; grid-row: 1; margin: 0; padding-left: 1.5rem; }
  .rate__bar { grid-column: 4; grid-row: 2; width: calc((100% + -1.5rem) * var(--per) / var(--per-max)); margin-left: 1.5rem; }
}

.circled { position: relative; margin-left: 0.85em; white-space: nowrap; color: var(--ink); }

.circled::after {
  content: "";
  position: absolute;
  inset: -0.45em -0.85em;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  transform: rotate(-2deg);
  pointer-events: none;
}

.terms {
  display: grid;
  gap: 0.35rem 2rem;
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
  line-height: 1.45;
}

@media (min-width: 760px) {
  .terms { grid-template-columns: 1fr 1fr; }
}

.terms li { position: relative; padding-left: 1.1rem; }

.terms li::before {
  content: "";
  position: absolute;
  left: 0.05rem;
  top: 0.62em;
  width: 5px;
  height: 5px;
  background: var(--accent);
}

.buy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin: 1.75rem 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* Retention tracks: a log scale from one minute to 30 days, set per row with --at in percent */

.tracks {
  max-width: 54rem;
  margin-top: 2rem;
  border: 1px solid var(--ink);
  background: var(--sheet);
}

.tracks__ruler,
.lanes li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem;
  padding: 0.9rem 1rem;
}

.tracks__ruler { border-bottom: 1px solid var(--ink); }

.tracks__name {
  font: 500 0.75rem/1.3 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.ruler {
  position: relative;
  display: block;
  height: 1.7rem;
  margin: 0 0.25rem;
  font: 400 0.75rem/1 var(--mono);
  color: var(--muted);
}

.ruler span {
  position: absolute;
  bottom: 0;
  left: calc(var(--at) * 1%);
  padding-top: 0.6rem;
  transform: translateX(-50%);
  white-space: nowrap;
}

.ruler span::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  height: 0.4rem;
  border-left: 1px solid var(--ink);
}

.ruler span:first-child { transform: none; }
.ruler span:first-child::before { left: 0; }
.ruler span:last-child { transform: translateX(-100%); }
.ruler span:last-child::before { left: auto; right: 0; }

.lanes { margin: 0; padding: 0; list-style: none; counter-reset: lane; }

.lanes li {
  align-items: center;
  border-bottom: 1px solid var(--rule);
  counter-increment: lane;
}

.lanes li:last-child { border-bottom: 0; }

.lane__name { font-weight: 600; line-height: 1.3; }

.lane__name::before {
  content: "\00a7\00a0" counter(lane);
  content: "\00a7\00a0" counter(lane) / "";
  display: block;
  margin-bottom: 0.2rem;
  font: 500 0.8125rem/1.4 var(--mono);
  color: var(--accent-text);
}

.lane {
  position: relative;
  display: block;
  height: 1.75rem;
  margin: 0 0.25rem;
  background:
    linear-gradient(90deg, transparent calc(38.4% + -0.5px), var(--rule) 0 calc(38.4% + 0.5px), transparent 0),
    linear-gradient(90deg, transparent calc(68.1% + -0.5px), var(--rule) 0 calc(68.1% + 0.5px), transparent 0),
    var(--paper);
}

.lane::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  bottom: 0.5rem;
  width: max(6px, calc(var(--at) * 1%));
  background: var(--ink);
}

.lane::after {
  content: "";
  position: absolute;
  top: 0.2rem;
  bottom: 0.2rem;
  left: max(4px, calc(var(--at) * 1%));
  border-left: 2px solid var(--accent);
}

.lane__note { font-size: 0.9375rem; line-height: 1.45; color: var(--muted); }

@media (min-width: 760px) {
  .tracks__ruler, .lanes li { grid-template-columns: 14rem minmax(0, 1fr); column-gap: 1.75rem; padding: 1rem 1.4rem; }
  .lane__note { grid-column: 2; }
}

.aside-link { margin: 1.25rem 0 0; }

.aside-link a { display: inline-flex; align-items: center; min-height: 44px; }

/* Footnote FAQ: always visible answers, numbered so body refs can point at them */

.notes {
  position: relative;
  margin: 2rem 0 0;
  padding: 1.75rem 0 0;
  list-style: none;
  counter-reset: fn;
}

.notes::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 7rem;
  height: 1px;
  background: var(--ink);
}

@media (min-width: 1000px) {
  .notes { columns: 2; column-gap: 3.5rem; }
}

.notes li {
  position: relative;
  padding: 0 0 1.6rem 1.9rem;
  break-inside: avoid;
  counter-increment: fn;
  scroll-margin-top: 1.5rem;
}

.notes li::before {
  content: counter(fn);
  content: counter(fn) / "";
  position: absolute;
  left: 0;
  top: 0.1rem;
  font: 500 0.8125rem/1.35 var(--mono);
  color: var(--accent-text);
}

.notes h3 { margin-bottom: 0.4rem; font-size: 1.0625rem; font-weight: 600; line-height: 1.35; }

.notes p { margin: 0; font-size: 0.9688rem; line-height: 1.55; }

.notes li:target { background: var(--wash); box-shadow: 0 0 0 0.6rem var(--wash); }

/* Guide index grouped by task */

.guides {
  margin-top: 2rem;
  border-top: 1px solid var(--ink);
}

.guides__group {
  display: grid;
  gap: 0.25rem;
  padding: 1.25rem 0 0.5rem;
  border-bottom: 1px solid var(--rule);
}

.guides__group h3 {
  padding-top: 0.2rem;
  font: 500 0.75rem/1.5 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.index {
  display: grid;
  column-gap: 2.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 760px) {
  .index { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .guides__group { grid-template-columns: 11rem minmax(0, 1fr); column-gap: 2rem; padding-top: 1rem; }
  .guides__group h3 { padding-top: 1rem; }
}

.index li {
  position: relative;
  padding: 0.8rem 0 0.9rem;
}

.index a { font-weight: 600; line-height: 1.3; text-decoration: none; }

.index a::after { content: ""; position: absolute; inset: 0; }

.index li:hover a { color: var(--accent-text); text-decoration: underline; }

.index li:focus-within { outline: 2px solid var(--focus); outline-offset: 2px; }

.index a:focus-visible { outline: none; }

.index p { margin: 0.25rem 0 0; font-size: 0.9375rem; line-height: 1.45; color: var(--muted); }

/* ==== 6. Tool skin: every vp-* class rendered by /assets/tool.js ==== */

#vp-tool { container: vp / inline-size; }

/* Space reserved before tool.js runs and before /api/web/status answers, sized to the loaded card with the Telegram button. */
#vp-tool:not(.vp-ready) { min-height: 26rem; border: 1px solid var(--ink); border-top: 0; background: var(--sheet); }

@media (min-width: 600px) and (max-width: 999px) {
  #vp-tool:not(.vp-ready) { min-height: 21rem; }
}

#vp-tool [hidden] { display: none !important; }

.vp-fallback { margin: 0; padding: 1.25rem; }

.vp-card {
  display: flex;
  flex-direction: column;
  background: var(--sheet);
  border: 1px solid var(--ink);
  border-top: 0;
}

.vp-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  background: var(--paper);
  border-bottom: 1px solid var(--ink);
}

.vp-tab {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 3.75rem;
  margin: 0;
  padding: 0.6rem 0.4rem;
  border: 0;
  border-right: 1px solid var(--rule);
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font: 500 0.875rem/1.2 var(--serif);
  text-align: center;
  cursor: pointer;
}

.vp-tab:last-child { border-right: 0; }

.vp-tab::before {
  content: "";
  flex: none;
  width: 1.125rem;
  height: 1.125rem;
  background: currentColor;
  -webkit-mask: var(--vp-icon) center / contain no-repeat;
  mask: var(--vp-icon) center / contain no-repeat;
}

.vp-tab[data-tab="record"] { --vp-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round'%3E%3Crect x='9' y='3' width='6' height='11' rx='3'/%3E%3Cpath d='M5 11a7 7 0 0 0 14 0M12 18v3'/%3E%3C/svg%3E"); }
.vp-tab[data-tab="file"] { --vp-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linejoin='round'%3E%3Cpath d='M14 3H6v18h12V7z'/%3E%3Cpath d='M14 3v4h4M12 17v-6M9 14l3-3 3 3'/%3E%3C/svg%3E"); }
.vp-tab[data-tab="link"] { --vp-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M10 14a4 4 0 0 0 5.7 0l3-3a4 4 0 0 0-5.7-5.7l-1 1'/%3E%3Cpath d='M14 10a4 4 0 0 0-5.7 0l-3 3a4 4 0 0 0 5.7 5.7l1-1'/%3E%3C/svg%3E"); }

.vp-tab:hover { color: var(--ink); background: var(--sheet); }

.vp-tab.vp-active {
  background: var(--sheet);
  color: var(--ink);
  font-weight: 600;
}

.vp-tab.vp-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: var(--accent);
}

.vp-tab:focus-visible { outline-offset: -4px; }

.vp-panel {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1.25rem 1rem 1.3rem;
}

.vp-clock {
  order: -1;
  margin: 0;
  font: 400 clamp(1.875rem, 1.5rem + 1.5vw, 2.5rem)/1 var(--mono);
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.vp-record {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  min-height: 3.25rem;
  padding: 0.75rem 1.3rem 0.75rem 1.1rem;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--ink);
  color: var(--paper);
  font: 600 1rem/1.2 var(--serif);
  text-align: left;
  cursor: pointer;
}

.vp-record::before {
  content: "";
  flex: none;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--accent);
  transition: transform 0.15s ease;
}

.vp-record:hover:not(:disabled) { box-shadow: inset 0 0 0 2px var(--paper); }
.vp-record:hover:not(:disabled)::before { transform: scale(1.25); }

.vp-record.vp-recording { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.vp-record.vp-recording::before { border-radius: 1px; background: var(--on-accent); }
.vp-record.vp-recording:hover::before { transform: none; }

.vp-record:disabled { opacity: 0.45; cursor: not-allowed; }

.vp-meter {
  display: none;
  width: 100%;
  height: 0.625rem;
  background: repeating-linear-gradient(90deg, var(--rule) 0 5px, transparent 5px 8px);
}

.vp-meter-fill {
  display: block;
  height: 100%;
  background: repeating-linear-gradient(90deg, var(--accent) 0 5px, transparent 5px 8px);
  clip-path: inset(0 calc(100% + -1 * var(--vp-level, 0) * 100%) 0 0);
}

.vp-clock-limit { font-size: 0.5em; letter-spacing: 0; color: var(--muted); }

#vp-tool[data-state="recording"] .vp-meter { display: block; }
#vp-tool[data-state="recording"] .vp-clock { color: var(--accent-text); }

.vp-hint {
  margin: 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.45;
  color: var(--muted);
  text-wrap: pretty;
}

.vp-drop {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  min-height: 10rem;
  padding: 1.25rem 1.1rem 1.25rem 3.75rem;
  border: 1px dashed var(--faint);
  background: var(--paper);
  cursor: pointer;
}

.vp-drop::before {
  content: "";
  position: absolute;
  left: 1.1rem;
  top: 50%;
  width: 1.75rem;
  height: 1.75rem;
  margin-top: -0.875rem;
  background: var(--accent);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 16V4M7 9l5-5 5 5M4 15v5h16v-5'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 16V4M7 9l5-5 5 5M4 15v5h16v-5'/%3E%3C/svg%3E") center / contain no-repeat;
}

.vp-drop:hover, .vp-drop.vp-over {
  border-style: solid;
  border-color: var(--accent);
  background: var(--wash);
}

.vp-drop:focus-within { outline: 2px solid var(--focus); outline-offset: 2px; }

.vp-drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }

.vp-drop-title { max-width: 22em; font-size: 1.0625rem; font-weight: 600; line-height: 1.4; text-wrap: balance; }

.vp-drop .vp-hint { font: 400 0.75rem/1.6 var(--mono); letter-spacing: 0.02em; text-wrap: balance; }

.vp-link {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 100%;
  margin: 0;
}

.vp-link input {
  min-width: 0;
  min-height: 3rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--paper);
  color: var(--ink);
  font: 400 1rem/1.3 var(--mono);
}

.vp-link input::placeholder { color: var(--muted); opacity: 1; }

.vp-link input:focus { outline: 2px solid var(--focus); outline-offset: 1px; }

.vp-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.6rem 1.15rem;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--ink);
  color: var(--paper);
  font: 600 0.9375rem/1.2 var(--serif);
  text-decoration: none;
  cursor: pointer;
}

.vp-button:hover { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

.vp-button.vp-secondary {
  min-height: 2.75rem;
  min-width: 3.5rem;
  padding: 0.6rem 0.75rem;
  background: transparent;
  color: var(--ink);
  font: 500 0.8125rem/1 var(--mono);
  letter-spacing: 0.06em;
}

.vp-button.vp-secondary:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.vp-link-button {
  min-height: 44px;
  padding: 0 0.25rem;
  border: 0;
  background: none;
  color: var(--ink);
  font: 500 0.8125rem/1 var(--mono);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 0.25em;
  cursor: pointer;
}

.vp-link-button:hover { color: var(--accent-text); }

.vp-account {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 0.95rem 1rem 1.05rem;
  border-top: 1px solid var(--rule);
  background: var(--paper);
}

.vp-account:has(.vp-account-text:empty) { min-height: 10.5rem; }

.vp-account-text {
  flex: 1 1 15rem;
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--muted);
}

.vp-account-text:empty { display: none; }

.vp-login { position: relative; display: flex; align-items: center; min-height: 40px; }

.vp-login:empty { display: none; }

.vp-login:not(:has(iframe, button)) { display: none; }

.vp-login iframe { display: block; color-scheme: light; }

.vp-login:not(.vp-login-ready) iframe { position: absolute; left: 0; opacity: 0; pointer-events: none; }

.vp-login-ready .vp-tg { display: none; }

.vp-tg {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 40px;
  padding: 0 1rem 0 0.85rem;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--sheet);
  color: var(--ink);
  font: 600 0.9375rem/1.2 var(--serif);
  cursor: pointer;
}

.vp-tg::before {
  content: "";
  flex: none;
  width: 1.05rem;
  height: 1.05rem;
  background: var(--accent);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linejoin='round'%3E%3Cpath d='M21 4 3 11l6 2.5L19 7l-7.5 8.5L18 20z'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linejoin='round'%3E%3Cpath d='M21 4 3 11l6 2.5L19 7l-7.5 8.5L18 20z'/%3E%3C/svg%3E") center / contain no-repeat;
}

.vp-tg:hover:not(:disabled) { background: var(--ink); color: var(--paper); }

.vp-tg:disabled { cursor: progress; color: var(--muted); }

.vp-progress {
  position: relative;
  margin: 0 1rem 1.25rem;
  padding: 0.9rem 0 0;
  border-top: 1px solid var(--rule);
}

.vp-progress::before {
  content: "";
  display: block;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--rule) 0 10px, transparent 10px 13px);
}

.vp-progress-bar {
  position: absolute;
  top: 0.9rem;
  left: 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--accent) 0 10px, transparent 10px 13px);
  transition: width 0.3s ease;
}

.vp-progress-text {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0.7rem 0 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
}

.vp-progress-text::before {
  content: "";
  flex: none;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
}

.vp-error {
  position: relative;
  margin: 0 1rem 1.25rem;
  padding: 0.75rem 1rem 0.75rem 2.6rem;
  border: 1px solid var(--accent);
  border-left-width: 3px;
  background: var(--paper);
  color: var(--ink);
  font-size: 0.9375rem;
  line-height: 1.45;
}

.vp-error::before {
  content: "!";
  content: "!" / "";
  position: absolute;
  left: 0.85rem;
  top: 0.8rem;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font: 600 0.75rem/1.1rem var(--mono);
  text-align: center;
}

.vp-note {
  margin: 0.9rem 0 0;
  padding: 0.7rem 0.9rem;
  border-left: 3px solid var(--ink);
  background: var(--paper);
  font-size: 0.9375rem;
  line-height: 1.45;
}

.vp-status {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.vp-result {
  padding: 1.25rem 1rem 1.35rem;
  border-top: 1px solid var(--ink);
  scroll-margin-top: 1rem;
}

.vp-result-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.25rem 1rem;
}

.vp-result-head h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.2; }

.vp-result-head h3:focus { outline: none; }

.vp-result-head h3:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; }

.vp-result-head .vp-hint {
  font: 500 0.75rem/1.4 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.vp-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.vp-text {
  max-height: 26rem;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 0.35rem 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: var(--sheet);
  counter-reset: ln;
}

.vp-cta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  min-height: 3rem;
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  line-height: 1.3;
  text-decoration: none;
}

.vp-cta::after { content: "\2192"; content: "\2192" / ""; font-family: var(--mono); }

.vp-cta:hover { background: var(--ink); color: var(--paper); }

@container vp (min-width: 26rem) {
  .vp-panel { padding: 1.35rem 1.25rem 1.4rem; }
  .vp-link { flex-direction: row; flex-wrap: wrap; }
  .vp-link input { flex: 1 1 12rem; }
  .vp-account { padding: 0.95rem 1.25rem 1.05rem; }
  .vp-account:has(.vp-account-text:empty) { min-height: 9.25rem; }
  .vp-progress, .vp-error { margin-left: 1.25rem; margin-right: 1.25rem; }
  .vp-result { padding: 1.25rem 1.25rem 1.35rem; }
}

@container vp (min-width: 34rem) {
  .vp-tab { flex-direction: row; gap: 0.5rem; font-size: 0.9375rem; }
  .vp-account:has(.vp-account-text:empty) { min-height: 6rem; }
}

/* Phone-width card: the record button keeps one width in both states, and the copy button takes its own row above the three exports. */
@container vp (max-width: 25.99rem) {
  .vp-record { align-self: stretch; gap: 0.55rem; padding-right: 0.9rem; padding-left: 0.9rem; font-size: 0.9375rem; }
  .vp-actions > :first-child { flex: 1 0 100%; }
  .vp-actions > :not(:first-child) { flex: 1 1 0; }
}

/* ==== 7. Motion: decorative only, and only for people who did not ask for less ==== */

@media (prefers-reduced-motion: no-preference) {
  #vp-tool[data-state="recording"] .vp-record::before { animation: vp-blink 1.2s ease-in-out infinite; }
  .hero:has(#vp-tool[data-state="recording"]) .col::after { animation: vp-blink 1.2s ease-in-out infinite; }
  #vp-tool[data-state="uploading"] .vp-progress-text::before,
  #vp-tool[data-state="working"] .vp-progress-text::before { animation: vp-blink 1s ease-in-out infinite; }
  .vp-indeterminate .vp-progress-bar { animation: vp-tape 0.9s linear infinite; }
  .vp-meter-fill { transition: clip-path 60ms linear; }
}

@media (prefers-reduced-motion: reduce) {
  .tr li, .vp-progress-bar, .vp-record::before { transition: none; }
}

@keyframes vp-blink { 50% { opacity: 0.3; } }

@keyframes vp-tape { to { background-position: 26px 0; } }