/*
 * kapelle.dev — one stylesheet for every page.
 *
 * The look is a terminal: a tmux bar on top, a vim status line at the bottom,
 * shell blocks for commands. It stays quiet so the words read first.
 *
 * Fonts, self-hosted under the SIL Open Font License (see fonts/): Martian Mono
 * for headings, menus and code; Fraunces italic only for the one accent word in
 * a heading. Body text uses the system's sans-serif. The TUI figures use the
 * system's own monospace font, as a terminal would.
 *
 * Auto follows the system. The person can pick a theme in the footer, or press
 * `t`: site.js then sets data-theme on <html>.
 *
 * Motion is small and optional: the hero prompt types, Fig. 01 replays, a few
 * spinners turn. Under prefers-reduced-motion none of it runs.
 */

@font-face {
  font-family: "Fraunces";
  src: url("/fonts/fraunces-italic.woff2") format("woff2");
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Martian Mono";
  src: url("/fonts/martian-mono.woff2") format("woff2");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "Fraunces", Georgia, serif;
  --mono: "Martian Mono", ui-monospace, Menlo, Consolas, monospace;
  --term: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --bg: #efebe5;
  --band: #e8e3dc;
  --surface: #f7f4f0;
  --code-bg: #e6e0d8;
  --text: #1b222c;
  --muted: #59616b;
  --faint: #8a8f96;
  --line: #d3cbc1;
  --grid: rgba(27, 34, 44, 0.06);
  --blue: #1d6e9c;
  --purple: #7a4aa3;
  --amber: #985814;
  --green: #3e7a4e;
  --pink: #a3326f;
  --red: #b23a3a;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1015;
    --band: #0a0d11;
    --surface: #141920;
    --code-bg: #0a0c10;
    --text: #e3e6e9;
    --muted: #98a1ac;
    --faint: #5d6672;
    --line: #232a33;
    --grid: rgba(92, 200, 255, 0.045);
    --blue: #5cc8ff;
    --purple: #c792ea;
    --amber: #ffb454;
    --green: #7fd99a;
    --pink: #ff6ac1;
    --red: #ff7a7a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1015;
  --band: #0a0d11;
  --surface: #141920;
  --code-bg: #0a0c10;
  --text: #e3e6e9;
  --muted: #98a1ac;
  --faint: #5d6672;
  --line: #232a33;
  --grid: rgba(92, 200, 255, 0.045);
  --blue: #5cc8ff;
  --purple: #c792ea;
  --amber: #ffb454;
  --green: #7fd99a;
  --pink: #ff6ac1;
  --red: #ff7a7a;
  color-scheme: dark;
}

/* ---- base ---- */

*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 72px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.65;
  text-wrap: pretty;
  overflow-x: clip;
}
::selection {
  background: var(--blue);
  color: var(--bg);
}
a {
  color: var(--blue);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}
:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}
h1,
h2,
h3 {
  font-family: var(--mono);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  text-wrap: balance;
}
/*
 * The highlight in a title: a serif italic in blue, the score beside the code.
 * It can be a word, the second line (after a <br>) or the whole title.
 */
h1 em,
h2 em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--blue);
}
code,
pre,
kbd {
  font-family: var(--mono);
  font-size: 0.78em;
}
p code,
li code,
td code,
dd code {
  font-size: 0.8em;
  overflow-wrap: anywhere;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 0.05em 0.35em;
}
pre {
  margin: 0;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px 18px;
  line-height: 1.85;
  overflow-x: auto;
  font-size: 13px;
}
pre .c {
  color: var(--faint);
}
pre .p {
  color: var(--green);
  user-select: none;
}
.mono {
  font-family: var(--mono);
}
.muted {
  color: var(--muted);
}
.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}
.narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---- the strip, the tmux header and the footer ---- */

.strip {
  background: var(--band);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  text-align: center;
  padding: 8px 16px;
  color: var(--muted);
}
.strip .lvl {
  color: var(--amber);
  margin-right: 8px;
}
.soon {
  color: var(--amber);
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 52px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-family: var(--mono);
  font-weight: 600;
  font-size: 14px;
}
.brand svg {
  shape-rendering: crispEdges;
}
.brand:hover {
  text-decoration: none;
}
.brand .crumb {
  color: var(--muted);
  font-weight: 400;
}
/* The nav reads like tmux's window list: "1:guide 2:orchestrator". */
.nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 12px;
}
.nav a {
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 3px;
}
.nav a i {
  font-style: normal;
  color: var(--faint);
}
.nav a i::after {
  content: ":";
}
.nav a:hover {
  color: var(--text);
  background: var(--surface);
  text-decoration: none;
}
.nav a[aria-current="page"] {
  color: var(--bg);
  background: var(--blue);
}
.nav a[aria-current="page"] i {
  color: inherit;
}
.nav a[aria-current="page"]::after {
  content: "*";
}
.nav-end {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

/* Empty lines past the end of a vim buffer, just above the footer. */
.tildes {
  margin: 0;
  padding: 24px 24px 8px;
  max-width: 1120px;
  margin-inline: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--blue);
  opacity: 0.55;
  white-space: pre;
  user-select: none;
}
.site-footer {
  border-top: 1px solid var(--line);
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  padding-bottom: 40px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}
.theme-picker {
  display: none;
  align-items: center;
  gap: 2px;
}
.js .theme-picker {
  display: flex;
}
.theme-picker .lbl {
  margin-right: 8px;
  color: var(--faint);
}
.theme-picker button {
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  border-radius: 3px;
  font: inherit;
  padding: 6px 10px;
  min-height: 32px;
  cursor: pointer;
}
.theme-picker button:hover {
  color: var(--text);
  border-color: var(--line);
}
.theme-picker button[aria-pressed="true"] {
  background: var(--text);
  color: var(--bg);
}
.theme-picker kbd {
  margin-left: 8px;
  font-size: 10px;
  color: var(--faint);
}

/* ---- the vim status line (site.js draws it; desktop only) ---- */

.statusline {
  display: none;
}
@media (min-width: 901px) {
  .has-statusline {
    padding-bottom: 26px;
  }
  .statusline {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 20;
    display: flex;
    height: 26px;
    align-items: stretch;
    font-family: var(--mono);
    font-size: 11px;
    line-height: 26px;
    background: var(--band);
    border-top: 1px solid var(--line);
    color: var(--muted);
    white-space: nowrap;
  }
  .statusline > span {
    padding: 0 12px;
  }
  .statusline .mode {
    background: var(--blue);
    color: var(--bg);
    font-weight: 700;
  }
  .statusline .file {
    background: var(--surface);
    color: var(--text);
  }
  .statusline .sec {
    color: var(--purple);
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .statusline .hint {
    margin-left: auto;
    color: var(--faint);
  }
  .statusline .cmd {
    min-width: 4ch;
    color: var(--amber);
  }
  .statusline .pct {
    background: var(--surface);
    color: var(--text);
    min-width: 7ch;
    text-align: right;
  }
}

/* ---- buttons, tabs and the install box ---- */

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--bg);
  background: var(--text);
  border: 1px solid var(--text);
  border-radius: 4px;
  padding: 12px 18px;
}
.btn:hover {
  text-decoration: none;
  background: var(--blue);
  border-color: var(--blue);
}
.btn.quiet {
  color: var(--text);
  background: transparent;
  border-color: var(--line);
}
.btn.quiet:hover {
  border-color: var(--text);
  background: var(--surface);
}
.install {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  font-family: var(--mono);
  text-align: left;
}
.install .tabs {
  display: none;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  align-items: stretch;
}
.js .install .tabs {
  display: flex;
}
.install .tabs button {
  white-space: nowrap;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font: inherit;
  padding: 10px 14px;
  min-height: 42px;
  cursor: pointer;
}
.install .tabs button:hover {
  color: var(--text);
}
.install .tabs button[aria-selected="true"] {
  color: var(--text);
  border-bottom-color: var(--blue);
}
.install .tabs .soon {
  margin-left: auto;
  align-self: center;
  padding: 0 14px;
}
.install .panel {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
}
.install .panel[hidden] {
  display: none;
}
.install .panel + .panel {
  border-top: 1px solid var(--line);
}
.js .install .panel + .panel {
  border-top: 0;
}
.install .panel pre {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  padding: 0;
  font-size: 13px;
  line-height: 1.8;
}
.install .label {
  display: block;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.js .install .label {
  display: none;
}
.copy {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  font: inherit;
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
}
.copy:hover {
  color: var(--text);
  border-color: var(--text);
}
.js .copy {
  display: inline-block;
}

/* ---- a shell block: a pre with a title bar ---- */

.shell {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--code-bg);
  overflow: hidden;
}
.shell .shell-bar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--faint);
  background: var(--surface);
}
.shell pre {
  border: 0;
  border-radius: 0;
  background: transparent;
}

/* ---- figures ---- */

figure {
  margin: 0;
}
.scroll-x {
  overflow-x: auto;
  max-width: 100%;
}

/* ---- section heads: "── 01 why ──────────" ---- */

.kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.kicker::before {
  content: "";
  width: 20px;
  border-top: 1px solid var(--line);
}
.kicker::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--line);
}
.kicker b {
  color: var(--blue);
  font-weight: 600;
}
.kicker .soon {
  letter-spacing: 0;
  text-transform: none;
}

/* ---- home ---- */

.hero {
  padding-top: 72px;
  padding-bottom: 48px;
}
/* A faint grid behind the hero, like graph paper, fading out downwards. */
.hero-bg {
  position: relative;
  isolation: isolate;
}
.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: center top;
  mask-image: linear-gradient(to bottom, #000 30%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, #000 30%, transparent);
  pointer-events: none;
}
.prompt {
  margin: 0 0 20px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}
.prompt .ps1 {
  color: var(--blue);
}
.prompt .dollar {
  color: var(--green);
}
.prompt .typed {
  color: var(--text);
}
.caret {
  display: inline-block;
  width: 0.6em;
  height: 1.15em;
  margin-left: 2px;
  vertical-align: -0.2em;
  background: var(--blue);
}
.hero h1 {
  margin: 0;
  max-width: 1000px;
  font-size: clamp(30px, 5.2vw, 58px);
  line-height: 1.08;
}
.hero h1 em {
  font-size: 1.12em;
}
.hero-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}
.hero .lede {
  margin: 0 0 24px;
  font-size: 21px;
  line-height: 1.5;
  color: var(--muted);
}
.hero .lede strong {
  color: var(--text);
  font-weight: 600;
}
.actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* The hero's fact sheet, laid out like neofetch: the logo, then key: value. */
.fetch {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.85;
}
.fetch svg {
  flex: none;
  shape-rendering: crispEdges;
  margin-top: 6px;
}
.fetch dl {
  margin: 0;
  min-width: 0;
}
.fetch .host {
  color: var(--text);
  font-weight: 600;
}
.fetch .host span {
  color: var(--blue);
}
.fetch .rule {
  color: var(--faint);
  letter-spacing: -0.05em;
}
.fetch dl > div {
  display: flex;
  gap: 0.6ch;
}
.fetch dt {
  color: var(--blue);
  flex: none;
}
.fetch dt::after {
  content: ":";
  color: var(--faint);
}
.fetch dd {
  margin: 0;
  color: var(--text);
}
.fetch .swatches {
  display: flex;
  margin-top: 12px;
}
.fetch .swatches i {
  width: 22px;
  height: 12px;
}

.section {
  padding-top: 104px;
  padding-bottom: 104px;
}
.section-band {
  background: var(--band);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section-top {
  border-top: 1px solid var(--line);
}
.section h2,
.h2 {
  margin: 0;
  font-size: clamp(26px, 3.6vw, 40px);
}
.section h2 + p,
.section .tag + h2 + p {
  margin-top: 22px;
}
.section p:not(.kicker) {
  margin: 18px 0 0;
}
.big {
  font-size: 20px;
}
.tag {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--amber);
}

/* Three panes with their name in the top border, like tmux pane titles. */
.roles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  padding-top: 8px;
  padding-bottom: 104px;
}
.pane {
  position: relative;
  border: 1px solid var(--line);
  border-top: 2px solid var(--c, var(--line));
  border-radius: 4px;
  padding: 26px 20px 20px;
  background: var(--surface);
}
.pane .title {
  position: absolute;
  top: -11px;
  left: 14px;
  padding: 0 8px;
  background: var(--bg);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 20px;
  color: var(--c);
}
.pane h3 {
  margin: 0 0 8px;
  font-size: 17px;
}
.pane p {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--muted);
}
.roles .you {
  --c: var(--blue);
}
.roles .play {
  --c: var(--purple);
}
.roles .part {
  --c: var(--amber);
}

.split {
  display: flex;
  gap: 56px;
  align-items: center;
}
.split > * {
  flex: 1;
  min-width: 0;
}
/* A bit more room for the words, so each title line fits on one line. */
.split > :first-child {
  flex: 1.1;
}
.split p:not(.kicker) {
  font-size: 19px;
  color: var(--muted);
}
.points {
  margin: 48px 0 0;
  display: grid;
  gap: 20px;
  font-size: 18px;
  line-height: 1.55;
}
.points dt {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
}
.points dt::before {
  content: "▸ ";
  color: var(--purple);
}
.points dd {
  margin: 4px 0 0 1.4em;
  color: var(--muted);
}


/* The agents table, drawn like a CLI's own list. */
.agents {
  margin-top: 28px;
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 13px;
}
.agents th {
  text-align: left;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
}
.agents th,
.agents td {
  padding: 11px 16px 11px 0;
  border-bottom: 1px dashed var(--line);
  vertical-align: top;
}
.agents td:first-child {
  color: var(--blue);
}
.agents td:nth-child(2) {
  color: var(--muted);
}
.agents tbody tr:hover td {
  background: var(--surface);
}
.agents .yes {
  color: var(--green);
}
.agents .yes::before {
  content: "● ";
}
.agents .no {
  color: var(--faint);
}
.agents .no::before {
  content: "○ ";
}

/* What kapelle does not do: each edge is a crossed-out line item. */
.limits {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 40px;
  margin-bottom: 104px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--surface);
}
.limits > div {
  padding: 22px 22px 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.limits > div:nth-child(3n) {
  border-right: 0;
}
.limits > div:nth-last-child(-n + 3) {
  border-bottom: 0;
}
.limits h3 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
}
.limits h3::before {
  content: "✕ ";
  color: var(--red);
}
.limits p {
  margin: 8px 0 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.card {
  display: block;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 20px 22px;
  color: var(--text);
}
a.card {
  background: var(--surface);
}
a.card:hover {
  text-decoration: none;
  border-color: var(--blue);
}
a.card:hover .title::after {
  transform: translateX(4px);
}
.card .title {
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
}
a.card .title::after {
  content: " →";
  display: inline-block;
  color: var(--blue);
  transition: transform 0.15s;
}
.card .text {
  display: block;
  margin-top: 6px;
  font-size: 16px;
  color: var(--muted);
}

/* ---- the TUI figure: a still of the chat screen ---- */

.tui {
  position: relative;
  width: 1040px;
  max-width: none;
  margin: 0 auto;
  background: #0b0d10;
  color: #d5d9de;
  font-family: var(--term);
  font-size: 13px;
  line-height: 1.55;
  border: 1px solid #262b33;
  border-radius: 8px;
  overflow: hidden;
  text-align: left;
  color-scheme: dark;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 30px 80px -30px rgba(0, 0, 0, 0.55),
    0 0 0 6px color-mix(in srgb, var(--line) 35%, transparent);
}
/* Faint scan lines: you notice them only if you look. */
.tui::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(255, 255, 255, 0.018) 0 1px, transparent 1px 3px);
}
.tui .bar {
  position: relative;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid #1e232a;
  color: #6b7480;
  font-size: 12px;
}
.tui .replay {
  display: none;
  position: absolute;
  right: 8px;
  top: 4px;
  z-index: 1;
  background: transparent;
  border: 1px solid #262b33;
  border-radius: 4px;
  color: #7d8692;
  font: inherit;
  font-size: 11px;
  padding: 1px 8px;
  cursor: pointer;
}
.tui .replay:hover {
  color: #d5d9de;
  border-color: #5cc8ff;
}
.js .tui .replay {
  display: block;
}
.tui .body {
  display: flex;
  height: 560px;
}
.tui .side {
  width: 236px;
  flex: none;
  border-right: 1px solid #1e232a;
  padding: 10px 0;
  display: flex;
  flex-direction: column;
}
.tui .side .row {
  display: flex;
  gap: 8px;
  padding: 2px 12px;
}
.tui .side .row.agent {
  padding-left: 28px;
}
.tui .side .row.open {
  background: #12151a;
}
.tui .side .room {
  color: #e8eaed;
  font-weight: 700;
}
.tui .side .h {
  color: #6b7480;
  margin-left: 0;
}
.tui .side .r {
  margin-left: auto;
  color: #6b7480;
}
.tui .side .head {
  padding: 0 12px 6px;
  color: #6b7480;
  display: flex;
  justify-content: space-between;
}
.tui .side .files {
  margin-top: auto;
  padding: 10px 12px 0;
  border-top: 1px solid #1e232a;
  color: #6b7480;
}
.tui .main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.tui .log {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  padding: 10px 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 6px;
}
.tui .msg {
  display: flex;
  gap: 10px;
  padding: 6px 14px 6px 12px;
}
.tui .msg::before {
  content: "";
  width: 3px;
  flex: none;
  border-radius: 1px;
  background: var(--who, #5b636e);
}
.tui .msg.you {
  background: #13171c;
}
.tui .who {
  color: var(--who, #9aa3ae);
  font-weight: 700;
}
.tui .meta,
.tui .tool,
.tui .dim {
  color: #7d8692;
}
.tui .text {
  white-space: pre-line;
  color: #d5d9de;
}
.tui .q {
  margin: 0 12px 8px;
  border: 1px solid #ff6ac1;
  border-radius: 6px;
  padding: 8px 12px;
}
.tui .q .pick {
  background: #2a1530;
  padding: 0 6px;
}
.tui .act {
  padding: 1px 14px;
  display: flex;
  gap: 8px;
}
.tui .compose {
  margin: 6px 12px 4px;
  border: 1px solid #2a3038;
  border-radius: 6px;
  padding: 7px 12px;
  color: #e8eaed;
}
.tui .cursor {
  background: #5cc8ff;
}
.tui .where {
  padding: 0 14px 6px;
  color: #9aa3ae;
}
.tui .status {
  padding: 4px 14px 6px;
  border-top: 1px solid #1e232a;
  color: #6b7480;
  display: flex;
  gap: 12px;
}
.tui .status .end {
  margin-left: auto;
}
.tui .po {
  --who: #c792ea;
  color: #c792ea;
}
.tui .dev {
  --who: #ffb454;
  color: #ffb454;
}
.tui .rev {
  --who: #7fd99a;
  color: #7fd99a;
}
.tui .writer {
  color: #8fb3ff;
}
.tui .ask {
  color: #ff6ac1;
}
.tui .room-mark {
  color: #5cc8ff;
}
.tui .add {
  color: #7fd99a;
}
.tui .del {
  color: #ff7a7a;
}
.tui .idle {
  color: #6b7480;
}
/* Fig. 01's replay: site.js hides each step, then shows it in turn. */
.tui .later {
  display: none;
}
.tui .shown {
  animation: rise 0.28s ease-out;
}
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---- blinking ---- */

@media (prefers-reduced-motion: no-preference) {
  .caret,
  .tui .cursor {
    animation: blink 1.1s steps(1) infinite;
  }
}
@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* ---- guide ---- */

.guide {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 56px;
  align-items: flex-start;
}
/* The contents, drawn as a file tree. */
.toc {
  flex: 0 0 236px;
  position: sticky;
  top: 53px;
  max-height: calc(100vh - 53px);
  overflow-y: auto;
  padding: 32px 0 48px;
  font-family: var(--mono);
  font-size: 11px;
}
.toc p {
  margin: 18px 0 4px;
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.toc p::before {
  content: "▾ ";
  color: var(--blue);
}
.toc p:first-child {
  margin-top: 0;
}
.toc a {
  display: block;
  color: var(--muted);
  padding: 3px 8px 3px 0;
  border-radius: 3px;
  line-height: 1.5;
}
.toc a::before {
  content: "├─ ";
  color: var(--faint);
}
.toc a:has(+ p)::before,
.toc a:last-child::before {
  content: "└─ ";
}
.toc a:hover {
  color: var(--text);
  background: var(--surface);
  text-decoration: none;
}
.toc a[aria-current="true"] {
  color: var(--blue);
  background: var(--surface);
}
.toc a[aria-current="true"]::after {
  content: " ◂";
}
.doc {
  flex: 1;
  min-width: 0;
  max-width: 780px;
  padding: 44px 0 64px;
}
.doc h1 {
  margin: 0;
  font-size: clamp(32px, 4.4vw, 46px);
}
.doc .lede {
  margin: 16px 0 0;
  font-size: 20px;
  color: var(--muted);
}
.doc h2 {
  margin: 80px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 26px;
}
.doc h3 {
  margin: 36px 0 0;
  font-size: 17px;
}
.doc p,
.doc ul,
.doc ol {
  margin: 14px 0 0;
}
.doc li + li {
  margin-top: 6px;
}
.doc pre {
  margin-top: 16px;
}
.doc .install {
  margin-top: 16px;
}
.doc .install pre {
  margin-top: 0;
}
.step {
  font-size: 15px;
  font-weight: 500;
  color: var(--blue);
  margin-right: 12px;
}
.step::before {
  content: "[";
  color: var(--faint);
}
.step::after {
  content: "]";
  color: var(--faint);
}
.note {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: 0 4px 4px 0;
  background: var(--surface);
  padding: 14px 18px;
  font-size: 17px;
}
.note.warn {
  border-left-color: var(--pink);
}
.note .kicker {
  display: block;
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--amber);
}
.note .kicker::before {
  content: "!! ";
  width: auto;
  border: 0;
}
.note .kicker::after {
  content: none;
}
.note.warn .kicker {
  color: var(--pink);
}
.note p {
  margin: 4px 0 0;
}
.table-box {
  margin-top: 16px;
  overflow-x: auto;
}
.doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
  line-height: 1.5;
}
.doc th,
.doc td {
  text-align: left;
  vertical-align: top;
  padding: 10px 14px 10px 0;
  border-bottom: 1px dashed var(--line);
}
.doc th {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
}
.doc td:first-child code {
  white-space: nowrap;
}
.pager {
  margin-top: 64px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
  font-family: var(--mono);
  font-size: 12px;
}

/* ---- 404 ---- */

.lost {
  padding: 120px 24px;
}
.lost .err {
  margin: 0 0 24px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--red);
}
.lost h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 52px);
}
.lost .actions {
  margin-top: 28px;
}

/* ---- narrow screens ---- */

/* The TUI still is a fixed 1040px picture: shrink it to fit, like an image. */
@media (max-width: 1100px) {
  .tui {
    zoom: 0.84;
  }
}
@media (max-width: 900px) {
  .tui {
    zoom: 0.66;
  }
}
@media (max-width: 700px) {
  .tui {
    zoom: 0.5;
  }
}
@media (max-width: 520px) {
  .tui {
    zoom: 0.32;
  }
  .install .tabs {
    overflow-x: auto;
  }
  .install .tabs .soon {
    display: none;
  }
}

@media (max-width: 900px) {
  html {
    scroll-padding-top: 16px;
  }
  .site-header {
    position: static;
  }
  .hero-grid,
  .roles,
  .limits,
  .cards {
    grid-template-columns: minmax(0, 1fr);
  }
  .roles {
    gap: 28px;
  }
  .limits > div {
    border-right: 0;
  }
  .limits > div:nth-last-child(-n + 3) {
    border-bottom: 1px solid var(--line);
  }
  .limits > div:last-child {
    border-bottom: 0;
  }
  .split {
    flex-direction: column;
    align-items: stretch;
    gap: 28px;
  }
  .nav {
    order: 3;
    width: 100%;
    padding-bottom: 10px;
    margin-left: -8px;
  }
  .guide {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .doc {
    width: 100%;
  }
  .toc {
    position: static;
    max-height: none;
    width: 100%;
    flex: none;
    padding-bottom: 0;
    columns: 2;
  }
  .toc p {
    break-after: avoid;
  }
}
@media (max-width: 520px) {
  body {
    font-size: 17px;
  }
  .nav-end {
    display: none;
  }
  .hero {
    padding-top: 44px;
  }
  .fetch {
    flex-direction: column;
    gap: 14px;
  }
  .section {
    padding-top: 72px;
    padding-bottom: 72px;
  }
  .toc {
    columns: 1;
  }
}