/*
 * smurg.ai: one stylesheet for every page. Editorial and calm: type does the work, one accent colour, nothing moves.
 * Colours and font stacks come from the app (apps/web/src/ui/tokens.css). Light by default here (a reading page),
 * dark when the OS prefers it. Contrast (WCAG 2.1): body text >= 7:1, subtle text >= 5.2:1 on every surface it sits on,
 * the accent >= 6.2:1, diagram lines >= 3.2:1 (non-text, 1.4.11).
 */
:root {
  color-scheme: light dark;
  --font-sans: system-ui, -apple-system, 'Segoe UI', 'PingFang TC', 'Noto Sans TC', 'Microsoft JhengHei',
    'Hiragino Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', 'JetBrains Mono', Menlo, Consolas, 'Liberation Mono',
    'Noto Sans Mono CJK TC', 'PingFang TC', 'Microsoft JhengHei', monospace;

  --bg: #ffffff;
  --panel: #f5f6f8;
  --border: #d9dee6;
  --border-strong: #b6bfcc;
  --text: #1b1f27;
  --muted: #485262;
  --subtle: #5d6878;
  --accent: #1d4ed8;
  --accent-soft: rgb(29 78 216 / 0.08);
  --focus: #2563eb;
  --line: #7d8799;
  --selection: rgb(29 78 216 / 0.18);

  --measure: 40rem;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --panel: #151821;
    --border: #2a3040;
    --border-strong: #3d4559;
    --text: #e6e9ef;
    --muted: #aab3c3;
    --subtle: #8e98ab;
    --accent: #7cb0ff;
    --accent-soft: rgb(124 176 255 / 0.12);
    --focus: #9cc2ff;
    --line: #5f6a80;
    --selection: rgb(124 176 255 / 0.3);
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1.0625rem/1.65 var(--font-sans);
  font-kerning: normal;
  overflow-wrap: break-word;
}

/* CJK reads better with more leading and without negative tracking. */
html:lang(zh-TW) body {
  line-height: 1.8;
}

::selection {
  background: var(--selection);
}

h1,
h2,
h3 {
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

p {
  margin: 0;
}

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

a:hover {
  text-decoration-thickness: 2px;
}

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

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

/* inline code and keys in running text (not the code blocks in pre.snippet) */
p code,
li > code,
dd code,
p kbd {
  padding: 0.05em 0.3em;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel);
  /* short commands, paths and keys: keep each on one line (the longest fits a 360 px screen) */
  white-space: nowrap;
}

p kbd {
  border-bottom-width: 2px;
}

svg {
  display: block;
}

.wrap {
  width: 100%;
  max-width: 76rem;
  margin-inline: auto;
  padding-inline: 16px;
}

@media (min-width: 640px) {
  .wrap {
    padding-inline: 32px;
  }
}

@media (min-width: 1024px) {
  .wrap {
    padding-inline: 48px;
  }
}

.skip {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 10;
  padding: 0.5rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
}

.skip:focus {
  top: 12px;
}

/* ---- header ---- */
.site-header {
  border-bottom: 1px solid var(--border);
}

.header-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.brand svg {
  width: 26px;
  height: 26px;
}

.mark-bg {
  fill: var(--accent);
}

.mark-fg {
  fill: var(--bg);
}

.mark-ln {
  fill: none;
  stroke: var(--bg);
  stroke-width: 2;
  stroke-linecap: round;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9375rem;
}

.site-nav a:hover {
  color: var(--text);
  text-decoration: underline;
}

.site-nav .lang a {
  color: var(--text);
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
}

/* On small screens only the outbound links stay; the page itself is one linear read. */
@media (max-width: 759px) {
  .site-nav .jump {
    display: none;
  }
}

/* ---- hero ---- */
.hero {
  padding-block: clamp(3.5rem, 9vw, 8rem) clamp(3.5rem, 8vw, 6.5rem);
}

.eyebrow,
.kicker {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--subtle);
}

.eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.6rem;
  margin-bottom: 1.5rem;
}

/* each part stays on one line; on a phone the second goes under the chip */
.eyebrow > span {
  white-space: nowrap;
}

.chip {
  padding: 0.1rem 0.6rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--text);
}

.hero h1 {
  font-size: clamp(2.125rem, 1.25rem + 3.9vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.028em;
  max-width: 22ch;
  text-wrap: balance;
}

/* Break the Chinese headline only between phrases (the <wbr> in the markup), never inside a word like 即時. */
html:lang(zh-TW) .hero h1 {
  font-size: clamp(2rem, 1.2rem + 3.4vw, 4rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
  max-width: 15em;
  word-break: keep-all;
}

.lede {
  margin-top: 1.75rem;
  max-width: 41rem;
  font-size: clamp(1.125rem, 1.02rem + 0.45vw, 1.375rem);
  line-height: 1.55;
  color: var(--muted);
}

html:lang(zh-TW) .lede {
  line-height: 1.8;
}

.install {
  margin-top: 2.75rem;
  max-width: 41rem;
}

.install-label {
  margin-bottom: 0.6rem;
  font-size: 0.9375rem;
  font-weight: 600;
}

.command {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--panel);
}

.command code {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.85rem 1rem;
  font-size: 1rem;
  line-height: 1.5;
  /* wrap at the spaces only (after "-fsSL" on a phone), never inside the URL */
  white-space: pre-wrap;
  overflow-wrap: break-word;
  /* one click or tap selects the whole command (the copy button is the other way) */
  user-select: all;
}

.command code::before {
  content: '$ ';
  color: var(--subtle);
  user-select: none;
}

.copy {
  flex: 0 0 auto;
  min-width: 5.75rem;
  margin: 0;
  padding: 0 1rem;
  border: 0;
  border-left: 1px solid var(--border-strong);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: transparent;
  color: var(--text);
  font: 500 0.9375rem/1 var(--font-sans);
  cursor: pointer;
}

.copy:hover {
  background: var(--accent-soft);
}

.copy:focus-visible {
  outline-offset: -3px;
}

/* Phones: the command takes the full width and the button sits under it. */
@media (max-width: 479px) {
  .command {
    flex-wrap: wrap;
  }

  .command code {
    flex-basis: 100%;
    font-size: 0.875rem;
  }

  .copy {
    flex: 1 1 100%;
    min-height: 2.75rem;
    border-left: 0;
    border-top: 1px solid var(--border-strong);
    border-radius: 0 0 var(--radius) var(--radius);
  }
}

.install-note {
  margin-top: 0.85rem;
  font-size: 0.9375rem;
  color: var(--muted);
}

.ui-note {
  margin-top: 1.25rem;
  padding-left: 0.85rem;
  border-left: 2px solid var(--accent);
  font-size: 0.9375rem;
  color: var(--muted);
}

/* ---- the workspace mock under the install line ----
 * An illustration of the web app's workbench (apps/web/src/app/workspace/Workbench.tsx), not a screenshot. Its colours
 * are the app's own (apps/web/src/ui/tokens.css, Monaco's vs / vs-dark token colours, the daemon's member and agent
 * colours), so they are set here instead of coming from the page's tokens. It is a picture (role="img"): nothing in
 * it is interactive. Hidden below 720 px, where its labels would be cut off. */
.mock-figure {
  display: none;
  margin: clamp(2.5rem, 5vw, 3.5rem) 0 0;
}

@media (min-width: 720px) {
  .mock-figure {
    display: block;
  }
}

.mock-figure figcaption {
  max-width: 48rem;
  margin-top: 0.85rem;
  font-size: 0.875rem;
  color: var(--subtle);
}

.mock {
  --m-bg: #f5f6f8;
  --m-s1: #ffffff;
  --m-s3: #eef1f5;
  --m-border: #d9dee6;
  --m-border-strong: #b6bfcc;
  --m-text: #1b1f27;
  --m-muted: #485262;
  --m-subtle: #5d6878;
  --m-accent: #1d4ed8;
  --m-accent-solid: #1d4ed8;
  --m-accent-soft: rgb(29 78 216 / 0.1);
  --m-success: #166534;
  --m-success-soft: rgb(21 128 61 / 0.1);
  --m-warning-soft: #fff7e0;
  --m-warning-text: #7c2d12;
  --m-code-bg: #ffffff;
  --m-code-fg: #1b1f27;
  --m-line-no: #687385;
  --m-line-hl: #f5f6f8;
  --m-shadow: 0 1px 2px rgb(15 17 21 / 0.06), 0 18px 48px rgb(15 17 21 / 0.1);
  --tok-kw: #0000ff;
  --tok-str: #a31515;
  --tok-type: #267f99;
  --tok-fn: #795e26;
  --tok-var: #001080;
  --ian: #4363d8;
  --amy: #e6194b;
  --ben: #2e8b3e;
  --claude-amy: #9333ea;
  --claude-ian: #d97706;
  border: 1px solid var(--m-border-strong);
  border-radius: 10px;
  background: var(--m-bg);
  box-shadow: var(--m-shadow);
  color: var(--m-text);
  font: 400 12px/1.45 var(--font-sans);
  overflow: hidden;
  user-select: none;
}

@media (prefers-color-scheme: dark) {
  .mock {
    --m-bg: #0f1115;
    --m-s1: #151821;
    --m-s3: #232838;
    --m-border: #2a3040;
    --m-border-strong: #3d4559;
    --m-text: #e6e9ef;
    --m-muted: #aab3c3;
    --m-subtle: #8e98ab;
    --m-accent: #7cb0ff;
    --m-accent-solid: #2563eb;
    --m-accent-soft: rgb(124 176 255 / 0.14);
    --m-success: #4ade80;
    --m-success-soft: rgb(74 222 128 / 0.12);
    --m-warning-soft: rgb(251 191 36 / 0.12);
    --m-warning-text: #fde68a;
    --m-code-bg: #0f1115;
    --m-code-fg: #e6e9ef;
    --m-line-no: #7d879a;
    --m-line-hl: #151821;
    --m-shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 18px 48px rgb(0 0 0 / 0.45);
    --tok-kw: #569cd6;
    --tok-str: #ce9178;
    --tok-type: #4ec9b0;
    --tok-fn: #dcdcaa;
    --tok-var: #9cdcfe;
  }
}

.mock * {
  white-space: nowrap;
}

.m-app {
  display: flex;
  flex-direction: column;
}

.mock .ic {
  flex: none;
  width: 13px;
  height: 13px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.m-chrome {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 34px;
  padding: 0 12px;
  border-bottom: 1px solid var(--m-border);
  background: var(--m-s3);
}

.m-dots {
  display: flex;
  gap: 6px;
}

.m-dots i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--m-border-strong);
}

.m-url {
  flex: 1;
  max-width: 420px;
  margin-inline: auto;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--m-s1);
  color: var(--m-muted);
  font-size: 11px;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
}

.m-top {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 44px;
  padding: 0 12px;
  border-bottom: 1px solid var(--m-border);
  background: var(--m-s1);
}

.m-word {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.m-divider {
  width: 1px;
  height: 18px;
  background: var(--m-border);
}

.m-ws {
  font-weight: 600;
}

.m-host {
  color: var(--m-muted);
}

.m-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--m-success-soft);
  color: var(--m-success);
  font-size: 11px;
  font-weight: 600;
}

.m-pill::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.m-spacer {
  flex: 1;
}

.m-avs {
  display: flex;
}

.mock .av {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  margin-left: -4px;
  border: 2px solid var(--m-s1);
  border-radius: 50%;
  font-size: 9px;
  font-weight: 700;
  font-style: normal;
}

.mock .av:first-child {
  margin-left: 0;
}

.mock .av .ic {
  width: 12px;
  height: 12px;
}

.av-ian {
  background: var(--ian);
  color: #ffffff;
}

.av-amy {
  background: var(--amy);
  color: #000000;
}

.av-ben {
  background: var(--ben);
  color: #000000;
}

.av-agent {
  background: var(--claude-amy);
  color: #ffffff;
}

.av-claude-ian {
  background: var(--claude-ian);
  color: #000000;
}

.mock .av-agent,
.mock .av-claude-ian {
  border-radius: 6px;
}

.m-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 24px;
  padding: 0 8px;
  border: 1px solid var(--m-border-strong);
  border-radius: 4px;
  background: var(--m-s1);
  font-size: 11px;
}

.m-btn-primary {
  border-color: var(--m-accent-solid);
  background: var(--m-accent-solid);
  color: #ffffff;
}

/* 720 to 1023 px: the editor and the agents; from 1024 px also the file tree and the suggestion box. */
.m-body {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 1px;
  background: var(--m-border);
}

.m-files,
.m-editor,
.m-agents {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--m-s1);
}

.m-files,
.m-suggest {
  display: none;
}

@media (min-width: 1024px) {
  .m-body {
    grid-template-columns: 196px minmax(0, 1fr) minmax(0, 0.82fr);
  }

  .m-files,
  .m-suggest {
    display: flex;
  }
}

.m-ph {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 10px;
  border-bottom: 1px solid var(--m-border);
  color: var(--m-muted);
  font-size: 11px;
  font-weight: 600;
}

.m-ph .m-btn {
  height: 20px;
  margin-left: auto;
  font-weight: 400;
}

.m-switch {
  margin: 8px 10px 4px;
  padding: 3px 8px;
  border: 1px solid var(--m-border);
  border-radius: 4px;
  color: var(--m-muted);
  font-size: 11px;
}

.m-tree {
  margin: 0;
  padding: 4px 0;
  list-style: none;
}

.m-tree li {
  display: flex;
  align-items: center;
  gap: 5px;
  height: 23px;
  padding: 0 8px 0 10px;
  overflow: hidden;
}

.m-tree .d1 {
  padding-left: 24px;
}

.m-tree .ic {
  color: var(--m-subtle);
}

.m-tree .on {
  background: var(--m-accent-soft);
}

.m-tag {
  margin-left: auto;
  padding: 0 5px;
  border-radius: 3px;
  font-size: 10px;
  line-height: 16px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.m-tag-human {
  background: var(--m-warning-soft);
  color: var(--m-warning-text);
}

.m-tag-agent {
  background: var(--m-accent-soft);
  color: var(--m-accent);
}

.m-tabs {
  display: flex;
  height: 30px;
  border-bottom: 1px solid var(--m-border);
  background: var(--m-s3);
  overflow: hidden;
}

.m-tabs span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0 12px;
  border-right: 1px solid var(--m-border);
  color: var(--m-muted);
}

.m-tabs .on {
  background: var(--m-s1);
  color: var(--m-text);
  box-shadow: inset 0 2px 0 var(--m-accent-solid);
}

.m-count {
  padding: 0 5px;
  border-radius: 999px;
  background: var(--m-accent-solid);
  color: #ffffff;
  font-size: 10px;
  font-style: normal;
  line-height: 15px;
}

.m-banner {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-bottom: 1px solid var(--m-border);
  background: var(--m-warning-soft);
  color: var(--m-warning-text);
  font-size: 11px;
  overflow: hidden;
}

.m-banner-info {
  background: var(--m-accent-soft);
  color: var(--m-text);
}

.m-code,
.m-term {
  flex: 1;
  margin: 0;
  padding: 8px 0;
  background: var(--m-code-bg);
  color: var(--m-code-fg);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 19px;
  overflow: hidden;
}

/* keep the indentation (`.mock *` would collapse it) */
.m-code,
.m-term,
.m-code *,
.m-term * {
  white-space: pre;
}

.m-code > span,
.m-term > span {
  display: block;
}

.m-code > span {
  padding-right: 8px;
}

.m-ln {
  display: inline-block;
  width: 34px;
  padding-right: 12px;
  color: var(--m-line-no);
  font-style: normal;
  text-align: right;
}

.m-hl {
  background: var(--m-line-hl);
}

.tk-k {
  color: var(--tok-kw);
}

.tk-s {
  color: var(--tok-str);
}

.tk-t {
  color: var(--tok-type);
}

.tk-f {
  color: var(--tok-fn);
}

.tk-v {
  color: var(--tok-var);
}

/* remote cursors, drawn the way y-monaco draws them in the app */
.m-cur {
  position: relative;
  display: inline-block;
  width: 0;
  height: 19px;
  vertical-align: top;
}

.m-cur::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 1px;
  bottom: 1px;
  border-left: 2px solid var(--c);
}

.m-cur b {
  position: absolute;
  left: -1px;
  bottom: 17px;
  padding: 0 4px;
  border-radius: 2px;
  background: var(--c);
  color: #000000;
  font: 600 10px/15px var(--font-sans);
}

.m-cur-amy {
  --c: var(--amy);
}

.m-cur-ben {
  --c: var(--ben);
}

.m-sel-ben {
  background: color-mix(in srgb, var(--ben) 25%, transparent);
}

.m-status {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 3px 10px;
  border-top: 1px solid var(--m-border);
  background: var(--m-s1);
  color: var(--m-subtle);
  font-size: 10.5px;
}

.m-term {
  padding: 8px 10px;
}

.m-term > span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.m-dim,
.m-prompt {
  color: var(--m-subtle);
}

.m-ok {
  color: var(--m-success);
}

.m-tool {
  font-weight: 700;
}

/* a block cursor; it does not blink (nothing on this page moves) */
.m-caret {
  display: inline-block;
  width: 7px;
  height: 14px;
  vertical-align: -2px;
  background: var(--m-code-fg);
}

.m-suggest {
  flex-direction: column;
  gap: 6px;
  padding: 0 0 8px;
  border-top: 1px solid var(--m-border);
}

.m-suggest .m-ph {
  border-bottom: 0;
}

.m-input {
  margin: 0 10px;
  padding: 6px 8px;
  border: 1px solid var(--m-border-strong);
  border-radius: 4px;
  color: var(--m-subtle);
  overflow: hidden;
  text-overflow: ellipsis;
}

.m-suggest .m-btn {
  align-self: flex-end;
  margin-right: 10px;
}

.m-drawer {
  border-top: 1px solid var(--m-border);
  background: var(--m-s1);
}

.m-feed {
  margin: 0;
  padding: 4px 0;
  list-style: none;
}

.m-feed li {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 26px;
  padding: 0 12px;
  overflow: hidden;
}

.mock .m-feed .av {
  width: 18px;
  height: 18px;
  margin: 0;
  border: 0;
  font-size: 8px;
}

.mock .m-feed .av .ic {
  width: 11px;
  height: 11px;
}

.m-what {
  overflow: hidden;
  text-overflow: ellipsis;
}

.m-via {
  padding: 0 5px;
  border-radius: 3px;
  background: var(--m-s3);
  color: var(--m-muted);
  font-size: 10px;
}

.m-ago {
  margin-left: auto;
  padding-left: 8px;
  color: var(--m-subtle);
  font-size: 11px;
}

/* ---- sections ---- */
.section {
  border-top: 1px solid var(--border);
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
}

.section-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 960px) {
  .section-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 3.5rem;
  }
}

.kicker {
  margin-bottom: 0.85rem;
}

.section h2 {
  font-size: clamp(1.625rem, 1.25rem + 1.2vw, 2.25rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

html:lang(zh-TW) .section h2 {
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.section-intro {
  margin-top: 1rem;
  max-width: var(--measure);
  color: var(--muted);
}

.section-head-wide {
  max-width: 48rem;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

h3 {
  font-size: 1.125rem;
  line-height: 1.35;
  letter-spacing: -0.005em;
}

/* ---- steps ---- */
.steps {
  display: grid;
  gap: 3rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Three columns from 1100 px: narrower columns would cut the invite link in step 2 (it never wraps). */
@media (min-width: 1100px) {
  .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2.5rem;
  }
}

/* Single column (phones, tablets): keep the text at a reading measure under its drawing. */
@media (max-width: 1099px) {
  .step > :not(.step-figure) {
    max-width: var(--measure);
  }
}

.step-figure {
  margin: 0 0 1.5rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
}

.step-figure svg {
  width: 100%;
  height: auto;
  max-width: 22rem;
  margin-inline: auto;
}

.step-num {
  margin-bottom: 0.4rem;
}

.step p {
  margin-top: 0.6rem;
  color: var(--muted);
}

.snippet {
  margin: 1rem 0 0;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  /* never break a command or a link inside a token; the longest line fits a 360 px screen, scroll is the fallback */
  white-space: pre;
  overflow-x: auto;
}

.snippet code {
  font-size: inherit;
}

.snippet .c {
  color: var(--subtle);
}

/* ---- diagrams (inline SVG; colours from the page) ---- */
.dg {
  color: var(--line);
}

.dg .ln {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.dg .ln-soft {
  fill: none;
  stroke: var(--border-strong);
  stroke-width: 1.5;
  stroke-linecap: round;
}

.dg .bx {
  fill: var(--bg);
  stroke: var(--line);
  stroke-width: 1.5;
}

.dg .ac {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.dg .ac-dash {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}

.dg .acf {
  fill: var(--accent);
}

.dg .soft {
  fill: var(--accent-soft);
}

.dg .dot {
  fill: var(--line);
}

.dg .bgf {
  fill: var(--bg);
}

.dg .sf {
  fill: var(--subtle);
}

.dg .cur {
  fill: none;
  stroke: var(--subtle);
  stroke-width: 2;
  stroke-linecap: round;
}

/* lines of text in the little editor drawings */
.dg .bar {
  fill: none;
  stroke: var(--border-strong);
  stroke-width: 4;
  stroke-linecap: round;
}

.dg .bar.thin {
  stroke-width: 3;
}

.dg text {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.dg .tt {
  fill: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
}

.dg .ts {
  fill: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
}

.dg .tm {
  fill: var(--subtle);
  font-family: var(--font-sans);
  font-size: 13px;
}

.dg .ta {
  fill: var(--accent);
}

.dg .tx {
  font-size: 11px;
}

.dg .tb {
  fill: var(--bg);
}

.dg .tick {
  fill: none;
  stroke: var(--bg);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---- features ---- */
.features {
  display: grid;
  gap: 2.25rem 3rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 720px) {
  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.features li {
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.features p {
  margin-top: 0.6rem;
  color: var(--muted);
}

/* ---- security ---- */
.diagram {
  margin: 0 0 clamp(2.5rem, 5vw, 3.5rem);
  padding: clamp(1rem, 3vw, 2rem);
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
}

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

/* Two drawings of the same thing: stacked below 1000 px (labels stay >= 12 px), side by side above. */
.diagram .tall {
  max-width: 24rem;
  margin-inline: auto;
}

.diagram .tall .tt {
  font-size: 20px;
}

.diagram .tall .ts {
  font-size: 16px;
}

.diagram .tall .tm {
  font-size: 15px;
}

.diagram .tall text {
  font-size: 14px;
}

.diagram .wide text {
  font-size: 13px;
}

/* Phones: give the drawing the width, so its smallest label still renders at about 12 px. */
@media (max-width: 479px) {
  .diagram {
    padding: 0.5rem;
  }
}

.diagram .wide {
  display: none;
  max-width: 1000px;
  margin-inline: auto;
}

@media (min-width: 1000px) {
  .diagram .wide {
    display: block;
  }

  .diagram .tall {
    display: none;
  }
}

.diagram figcaption {
  margin-top: 1rem;
  font-size: 0.9375rem;
  color: var(--subtle);
  text-align: center;
}

.points {
  display: grid;
  gap: 2.25rem 3rem;
}

@media (min-width: 720px) {
  .points {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.points p,
.limits li {
  color: var(--muted);
}

.points p {
  margin-top: 0.6rem;
}

.limits {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  padding: 1.5rem clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.limits ul {
  display: grid;
  gap: 0.75rem;
  margin: 1rem 0 0;
  padding-left: 1.1rem;
}

.more {
  margin-top: 1.5rem;
  font-size: 0.9375rem;
}

/* ---- platforms ---- */
.facts {
  margin: 0;
  display: grid;
}

.facts > div {
  display: grid;
  gap: 0.35rem;
  padding-block: 1.1rem;
  border-top: 1px solid var(--border);
}

.facts > div:last-child {
  border-bottom: 1px solid var(--border);
}

@media (min-width: 720px) {
  .facts > div {
    grid-template-columns: minmax(0, 13rem) minmax(0, 1fr);
    gap: 2rem;
  }
}

.facts dt {
  font-weight: 600;
}

.facts dd {
  margin: 0;
  color: var(--muted);
}

.status {
  margin-top: 1.5rem;
  max-width: var(--measure);
  font-size: 0.9375rem;
  color: var(--subtle);
}

/* ---- documentation links ---- */
.links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.75rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.lead-text {
  max-width: var(--measure);
  font-size: 1.1875rem;
  line-height: 1.6;
  color: var(--muted);
}

html:lang(zh-TW) .lead-text {
  line-height: 1.85;
}

.lead-text + .ui-note {
  margin-top: 1.25rem;
  max-width: var(--measure);
}

/* ---- FAQ ---- */
.faq {
  display: grid;
  gap: 2.25rem;
  max-width: 46rem;
}

.faq p {
  margin-top: 0.6rem;
  color: var(--muted);
}

/* ---- footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2.5rem 3rem;
  font-size: 0.9375rem;
  color: var(--subtle);
}

.footer-row {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 760px) {
  .footer-row {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
  }
}

.footer-row ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-row a {
  color: var(--muted);
}

.footer-row a:hover {
  color: var(--text);
}

/* ---- 404 ---- */
.notfound {
  padding-block: clamp(4rem, 12vw, 9rem);
}

.notfound h1 {
  font-size: clamp(2rem, 1.4rem + 2.6vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.notfound p {
  margin-top: 1.25rem;
  max-width: var(--measure);
  color: var(--muted);
}

.notfound ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.75rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

/* ---- docs: the pages generated from the repository's Markdown (/docs/…, /license/; scripts/site.ts) ---- */
.doc-layout {
  display: grid;
  gap: 2rem;
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(3.5rem, 8vw, 6rem);
}

@media (min-width: 1024px) {
  .doc-layout {
    grid-template-columns: 13.5rem minmax(0, 1fr);
    gap: 4rem;
  }

  .doc-side {
    position: sticky;
    top: 1.5rem;
    align-self: start;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
  }
}

.doc-nav ul,
.doc-toc ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.doc-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
}

.doc-nav a,
.doc-toc a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9375rem;
}

.doc-nav a:hover,
.doc-toc a:hover {
  color: var(--text);
  text-decoration: underline;
}

.doc-nav a[aria-current='page'] {
  color: var(--text);
  font-weight: 600;
}

/* The page's own contents only beside the text; on narrower screens the docs' own lists of sections do the job. */
.doc-toc {
  display: none;
}

@media (min-width: 1024px) {
  .doc-nav ul,
  .doc-toc ul {
    display: grid;
    gap: 0.45rem;
  }

  .doc-toc {
    display: block;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
  }

  .doc-toc a {
    font-size: 0.875rem;
    line-height: 1.45;
  }
}

.doc {
  min-width: 0;
  max-width: 46rem;
}

.doc-single {
  /* the license keeps its own 120-column lines: room for them, wrapping only on narrower screens */
  max-width: 66rem;
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(3.5rem, 8vw, 6rem);
}

.doc h1 {
  font-size: clamp(1.875rem, 1.4rem + 1.8vw, 2.625rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

html:lang(zh-TW) .doc h1 {
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.doc h2 {
  margin-top: 3rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border);
  font-size: 1.5rem;
  line-height: 1.35;
}

.doc h3 {
  margin-top: 2rem;
}

.doc h4 {
  margin: 1.5rem 0 0;
  font-size: 1rem;
}

.doc h2,
.doc h3,
.doc h4 {
  scroll-margin-top: 1rem;
}

.doc p,
.doc ul,
.doc ol,
.doc pre,
.doc blockquote,
.doc .table-wrap {
  margin: 1rem 0 0;
}

.doc ul,
.doc ol {
  padding-left: 1.4rem;
}

.doc li + li,
.doc li > ul,
.doc li > ol,
.doc li > p {
  margin-top: 0.4rem;
}

.doc li > p:first-child {
  margin-top: 0;
}

/* Long commands and paths in running text may wrap here (the landing page keeps its short ones on one line). */
.doc :not(pre) > code {
  padding: 0.05em 0.3em;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel);
  white-space: normal;
  overflow-wrap: anywhere;
}

.doc pre {
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  overflow-x: auto;
}

.doc pre code {
  font-size: inherit;
}

.doc blockquote {
  padding-left: 0.85rem;
  border-left: 2px solid var(--border-strong);
  color: var(--muted);
}

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

.table-wrap {
  overflow-x: auto;
}

.table-wrap:focus-visible {
  outline-offset: 2px;
}

.doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.doc th,
.doc td {
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.doc th {
  background: var(--panel);
  font-weight: 600;
}

.doc .ta-center {
  text-align: center;
}

.doc .ta-right {
  text-align: right;
}

.doc-lede {
  font-size: 1.125rem;
  color: var(--muted);
}

.doc .doc-note {
  padding-left: 0.85rem;
  border-left: 2px solid var(--accent);
  font-size: 0.9375rem;
  color: var(--muted);
}

.doc-cards {
  display: grid;
  gap: 1.5rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.doc .doc-cards li {
  margin: 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.doc .doc-cards h2 {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 1.125rem;
}

.doc .doc-cards p {
  margin-top: 0.4rem;
  color: var(--muted);
}

.license-text {
  font-size: 0.8125rem;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

/* Colour changes only; nothing slides or fades, and nothing at all when reduced motion is asked for. */
@media (prefers-reduced-motion: no-preference) {
  a,
  .copy {
    transition:
      color 120ms ease,
      background-color 120ms ease;
  }
}

@media print {
  .site-header nav,
  .doc-side,
  .copy,
  .skip {
    display: none;
  }

  .section {
    break-inside: avoid-page;
  }
}