/* Signal's lobes' layer, the site: the page's room, the head, the parts every page is made of, a chapter's four
   shapes, the five apps, the wait, the band and the foot. Every rule names a class (LOOK-3). */

/* The page's room: every part asks this container how wide it is, never the window. */
.signal-site {
  container: signal-site / inline-size;
  margin: 0;
  min-height: 100vh;
  background: var(--signal-surface);
  color: var(--signal-body);
  font-family: var(--signal-font);
  font-size: calc(var(--signal-size-base) * var(--access-text-size, 1));
  line-height: calc(1.6 * var(--access-leading, 1));
  -webkit-font-smoothing: antialiased;
  color-scheme: var(--signal-scheme);
}
/* The three tints as wayfinding: a page, or a part of one, wears a site's colour in whichever theme stands. A design
   lobe's own tint is its setting, laid as tokens (LOOK-3); these are for a site's pages, which no lobe draws. */
.signal-tint-mint {
  --signal-accent: var(--signal-site-org);
  --signal-filament: var(--signal-site-org-filament);
  --signal-glow: var(--signal-site-org-glow);
}
.signal-tint-coral {
  --signal-accent: var(--signal-site-com);
  --signal-filament: var(--signal-site-com-filament);
  --signal-glow: var(--signal-site-com-glow);
}
.signal-tint-violet {
  --signal-accent: var(--signal-site-ai);
  --signal-filament: var(--signal-site-ai-filament);
  --signal-glow: var(--signal-site-ai-glow);
}
.signal-wrap {
  box-sizing: border-box;
  max-width: var(--signal-wide);
  margin-inline: auto;
  padding-inline: var(--signal-gutter);
}
.signal-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* The head: the mark, the three sites, the page's links, the languages, the theme. One on all three sites. */
.signal-head {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--signal-line);
  background: color-mix(in srgb, var(--signal-surface) 86%, transparent);
  backdrop-filter: blur(14px);
}
.signal-head-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  height: 3.5rem;
}
.signal-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--signal-text);
  text-decoration: none;
}
.signal-brand-name {
  display: none;
  font-family: var(--signal-font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.signal-mark {
  display: block;
  width: 1.75rem;
  height: 1.75rem;
}
.signal-mark-line {
  fill: none;
  stroke: var(--signal-accent);
  stroke-width: 2.4;
  stroke-linecap: round;
}
.signal-mark-tip {
  fill: var(--signal-text);
}
.signal-mark-core {
  fill: var(--signal-accent);
}
.signal-sites {
  display: flex;
  margin: 0;
  padding: 2px;
  border: 1px solid var(--signal-line-strong);
  border-radius: 999px;
  list-style: none;
}
.signal-site-link {
  display: flex;
  align-items: center;
  gap: 0.3125rem;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  color: var(--signal-muted);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-tiny);
  font-weight: 500;
  text-decoration: none;
}
.signal-site-link:hover {
  color: var(--signal-text);
}
.signal-site-link[aria-current] {
  background: var(--signal-raised-strong);
  color: var(--signal-text);
}
.signal-site-dot {
  width: 0.4375rem;
  height: 0.4375rem;
  border-radius: 50%;
}
.signal-site-org {
  background: var(--signal-site-org);
}
.signal-site-com {
  background: var(--signal-site-com);
}
.signal-site-ai {
  background: var(--signal-site-ai);
}
.signal-head-links {
  display: none;
  gap: 1.5rem;
  margin: 0 0 0 auto;
  padding: 0;
  list-style: none;
}
.signal-head-link {
  color: var(--signal-body);
  font-size: var(--signal-size-small);
  font-weight: 500;
  text-decoration: none;
}
.signal-head-link:hover {
  color: var(--signal-text);
}
.signal-switchers {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-inline-start: auto;
}
.signal-fold {
  position: relative;
}
.signal-fold-press {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  box-sizing: border-box;
  min-width: 2.25rem;
  height: 2.25rem;
  padding: 0 0.5rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: none;
  color: var(--signal-text);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-tiny);
  font-weight: 500;
  letter-spacing: 0.04em;
  list-style: none;
  cursor: pointer;
}
.signal-fold-press::-webkit-details-marker {
  display: none;
}
.signal-fold-press:hover,
.signal-fold[open] > .signal-fold-press {
  border-color: var(--signal-line-strong);
  background: var(--signal-raised);
}
/* The languages' press is seen as a control at rest: outlined as the sites' capsule is, its fold's mark turning. */
.signal-langs-press {
  gap: 0.3125rem;
  padding: 0 0.5rem;
  border-color: var(--signal-line-strong);
}
/* On a phone the head has no room for the globe: the code, the fold's mark and the outline say it. */
.signal-globe {
  display: none;
}
@container signal-site (min-width: 30rem) {
  .signal-globe {
    display: block;
  }
}
.signal-chevron {
  width: 0.875rem;
  height: 0.875rem;
  color: var(--signal-muted);
  transition: transform 160ms ease;
}
.signal-fold[open] > .signal-langs-press > .signal-chevron {
  transform: rotate(180deg);
}
@media (prefers-reduced-motion: reduce) {
  .signal-chevron {
    transition: none;
  }
}
.signal-fold-press:focus-visible,
.signal-site-link:focus-visible,
.signal-action:focus-visible,
.signal-head-link:focus-visible,
.signal-entry:focus-visible,
.signal-app:focus-visible,
.signal-field:focus-visible {
  outline: 2px solid var(--signal-accent);
  outline-offset: 2px;
}
.signal-fold-panel {
  position: absolute;
  top: calc(100% + 0.5rem);
  inset-inline-end: 0;
  box-sizing: border-box;
  width: max-content;
  max-width: calc(100cqi - 2 * var(--signal-gutter));
  margin: 0;
  padding: 0.375rem;
  border: 1px solid var(--signal-line-strong);
  border-radius: var(--signal-radius-card);
  background: var(--signal-raised);
  box-shadow: var(--signal-shadow);
  list-style: none;
}
.signal-langs-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.signal-fold-link {
  display: flex;
  align-items: baseline;
  gap: 0.625rem;
  padding: 0.4375rem 0.75rem;
  border-radius: 8px;
  color: var(--signal-body);
  font-size: var(--signal-size-small);
  text-decoration: none;
}
.signal-fold-link:hover,
.signal-fold-link[aria-current] {
  background: var(--signal-sunken);
  color: var(--signal-text);
}
.signal-lang-code {
  color: var(--signal-muted);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-tiny);
}
.signal-fold-link[aria-current] .signal-lang-code {
  color: var(--signal-accent);
}
.signal-icon {
  width: 1.125rem;
  height: 1.125rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.signal-theme-day {
  display: var(--signal-show-day);
}
.signal-theme-night {
  display: var(--signal-show-night);
}
@container signal-site (min-width: 34rem) {
  .signal-brand-name {
    display: block;
  }
  .signal-head-row {
    gap: 1rem;
  }
}
@container signal-site (min-width: 58rem) {
  .signal-head-links {
    display: flex;
  }
  .signal-switchers {
    margin-inline-start: 1rem;
  }
  .signal-menu {
    display: none;
  }
}

/* The parts every page is made of: the eyebrow, the title, the lead, the action. */
.signal-eyebrow {
  margin: 0;
  color: var(--signal-accent);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-tiny);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.signal-title {
  margin: 0;
  color: var(--signal-text);
  font-family: var(--signal-font-display);
  font-size: var(--signal-size-title);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.signal-lead {
  max-width: var(--signal-measure);
  margin: 0;
  color: var(--signal-body);
  font-size: var(--signal-size-lead);
  line-height: 1.5;
}
.signal-text {
  max-width: var(--signal-measure);
  margin: 0;
}
.signal-note {
  margin: 0;
  color: var(--signal-muted);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-tiny);
  letter-spacing: 0.04em;
}
.signal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.signal-action {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-sizing: border-box;
  min-height: 2.75rem;
  padding: 0 1.25rem;
  border: 1px solid var(--signal-line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--signal-text);
  font-family: var(--signal-font);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.signal-action:hover {
  border-color: var(--signal-text);
}
.signal-action-accent {
  border-color: var(--signal-accent);
  background: var(--signal-accent);
  color: var(--signal-on-accent);
  box-shadow: 0 0 24px -6px var(--signal-glow);
}
.signal-action-accent:hover {
  border-color: var(--signal-accent);
  filter: brightness(1.08);
}
.signal-action-danger {
  border-color: var(--signal-danger);
  color: var(--signal-danger);
}

/* The hero: a page's one opening. The statement stands before its figure, in the source and so on a phone. */
.signal-hero {
  padding-block: 3rem 3.5rem;
}
.signal-hero-row {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}
.signal-hero-words {
  display: grid;
  gap: 1.5rem;
}
@container signal-site (min-width: 58rem) {
  .signal-wrap {
    --signal-gutter: 2.5rem;
  }
  .signal-hero {
    padding-block: 5.5rem 6rem;
  }
  .signal-hero-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 3rem;
  }
}

/* A chapter: its number in the margin, as a filament's beat, then one of four shapes. */
.signal-chapter {
  scroll-margin-top: 3.5rem;
  padding-block: 3rem;
  border-top: 1px solid var(--signal-line);
}
.signal-chapter-head {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2rem;
}
.signal-number {
  color: var(--signal-accent);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-small);
  font-weight: 500;
}
.signal-chapter-title {
  margin: 0;
  color: var(--signal-text);
  font-family: var(--signal-font-display);
  font-size: var(--signal-size-chapter);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.signal-beside {
  display: grid;
  gap: 2rem;
  align-items: center;
}
.signal-stack {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}
@container signal-site (min-width: 58rem) {
  .signal-chapter {
    display: grid;
    grid-template-columns: 5rem minmax(0, 1fr);
    padding-block: 5rem;
  }
  .signal-chapter-body {
    grid-column: 2;
  }
  .signal-chapter-head {
    display: contents;
  }
  .signal-chapter-head > .signal-number {
    grid-column: 1;
    padding-top: 0.875rem;
  }
  .signal-chapter-head > .signal-chapter-title {
    grid-column: 2;
    margin-bottom: 2rem;
  }
  .signal-beside {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 3.5rem;
  }
  .signal-beside-flip {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
  .signal-beside-flip > .signal-scene {
    order: -1;
  }
}

/* A status pill: what holds in the accent, what holds in part plain, what does not yet dashed. */
.signal-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.signal-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.1875rem 0.625rem;
  border: 1px solid var(--signal-line-strong);
  border-radius: 999px;
  color: var(--signal-body);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-tiny);
  font-weight: 500;
  white-space: nowrap;
}
.signal-pill-accent {
  border-color: color-mix(in srgb, var(--signal-accent) 45%, transparent);
  background: color-mix(in srgb, var(--signal-accent) 12%, transparent);
  color: var(--signal-text);
}
.signal-pill-accent::before {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: var(--signal-accent);
  content: '';
}
.signal-pill-later {
  border-style: dashed;
  color: var(--signal-muted);
}

/* A ruled list of entries, each a way in. */
.signal-entries {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--signal-line-strong);
  list-style: none;
}
.signal-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.125rem 1rem;
  align-items: baseline;
  padding: 1rem 0.25rem;
  border-bottom: 1px solid var(--signal-line);
  color: inherit;
  text-decoration: none;
}
.signal-entry-title {
  color: var(--signal-text);
  font-family: var(--signal-font-display);
  font-size: 1.1875rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.signal-entry-words {
  grid-column: 1;
  font-size: var(--signal-size-small);
}
.signal-entry-go {
  grid-row: 1;
  grid-column: 2;
  color: var(--signal-subtle);
  font-family: var(--signal-font-mono);
}
.signal-entry:hover .signal-entry-go {
  color: var(--signal-accent);
}

/* Code: shown, never run. It scrolls inside its own box, so the page never does. */
.signal-code {
  margin: 0;
  border: 1px solid var(--signal-line-strong);
  border-radius: var(--signal-radius-card);
  background: var(--signal-raised);
  overflow: hidden;
}
.signal-code-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  border-bottom: 1px solid var(--signal-line);
  color: var(--signal-muted);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-tiny);
  letter-spacing: 0.04em;
}
.signal-code-name::before {
  width: 0.4375rem;
  height: 0.4375rem;
  border-radius: 50%;
  background: var(--signal-accent);
  box-shadow: 0 0 8px var(--signal-glow);
  content: '';
}
.signal-code-body {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  color: var(--signal-text);
  font-family: var(--signal-font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  tab-size: 2;
}
.signal-ink-quiet {
  color: var(--signal-muted);
}
.signal-ink-accent {
  color: var(--signal-accent);
}
.signal-ink-strong {
  font-weight: 500;
}

/* A table: ruled, its first column the row's name; it scrolls inside its own box on a phone. */
.signal-table-box {
  border: 1px solid var(--signal-line-strong);
  border-radius: var(--signal-radius-card);
  background: var(--signal-raised);
  overflow-x: auto;
}
.signal-table {
  width: 100%;
  min-width: 38rem;
  border-collapse: collapse;
  font-size: var(--signal-size-small);
}
.signal-th {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--signal-line-strong);
  color: var(--signal-muted);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-tiny);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-align: start;
  text-transform: uppercase;
}
.signal-td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--signal-line);
  vertical-align: top;
}
.signal-td-name {
  color: var(--signal-text);
  font-weight: 600;
  white-space: nowrap;
}
.signal-row-last > .signal-td {
  border-bottom: 0;
}

/* The five apps: a card each, the device drawn small around the same heart. */
.signal-apps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.signal-app {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 1rem;
  align-items: center;
  padding: 0.75rem 1rem;
  border: 1px solid var(--signal-line-strong);
  border-radius: var(--signal-radius-card);
  background: var(--signal-raised);
  color: inherit;
  text-decoration: none;
}
.signal-app:hover {
  border-color: var(--signal-accent);
}
.signal-app-name {
  color: var(--signal-text);
  font-family: var(--signal-font-display);
  font-size: 1.1875rem;
  font-weight: 700;
}
.signal-device {
  grid-row: 1 / span 2;
  width: 4.5rem;
  height: 3rem;
}
.signal-app-name {
  align-self: end;
}
.signal-app-kind {
  align-self: start;
}
.signal-device-body {
  fill: none;
  stroke: var(--signal-muted);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.signal-core {
  fill: var(--signal-accent);
  animation: signal-beat var(--signal-pulse-duration) ease-in-out infinite;
}
@keyframes signal-beat {
  50% {
    opacity: 0.45;
  }
}
@container signal-site (min-width: 34rem) {
  .signal-apps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .signal-app {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.25rem;
    padding: 1rem;
  }
  .signal-device {
    grid-row: auto;
    margin-bottom: 0.5rem;
  }
}
@container signal-site (min-width: 58rem) {
  .signal-apps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* A state: the glyph of the wait over a head. A pulse travels while a thing is awaited, never a spinner;
   dashed to a node not yet there; broken where the asking failed. */
.signal-states {
  display: grid;
  gap: 0.75rem;
}
.signal-state {
  display: grid;
  gap: 0.5rem;
  justify-items: center;
  padding: 2rem 1rem;
  border: 1px solid var(--signal-line-strong);
  border-radius: var(--signal-radius-card);
  background: var(--signal-raised);
  text-align: center;
}
.signal-state-title {
  margin: 0.5rem 0 0;
  color: var(--signal-text);
  font-family: var(--signal-font-display);
  font-size: 1.1875rem;
  font-weight: 700;
}
.signal-state-words {
  margin: 0;
  font-size: var(--signal-size-small);
}
.signal-glyph {
  width: 7.5rem;
  height: 1.5rem;
  overflow: visible;
}
.signal-glyph-end {
  fill: var(--signal-accent);
}
.signal-glyph-absent {
  fill: none;
  stroke: var(--signal-subtle);
  stroke-width: 1.6;
  stroke-dasharray: 2 3;
}
.signal-glyph-stop {
  stroke: var(--signal-danger);
  stroke-width: 2.4;
  stroke-linecap: round;
}
.signal-state-failed {
  border-color: color-mix(in srgb, var(--signal-danger) 50%, transparent);
}
@container signal-site (min-width: 46rem) {
  .signal-states {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* A script written joined, from the right, is never spaced apart: its letters would part. */
.signal-eyebrow:dir(rtl),
.signal-title:dir(rtl),
.signal-chapter-title:dir(rtl),
.signal-lead:dir(rtl),
.signal-action:dir(rtl) {
  letter-spacing: 0;
}

/* A band: a ground washed with the accent, and in it the room where a page wakes its visitor's organism. */
.signal-band {
  padding-block: 3rem;
  border-top: 1px solid var(--signal-line);
  background: linear-gradient(180deg, color-mix(in srgb, var(--signal-accent) 9%, transparent), transparent 70%);
}
.signal-band-row {
  display: grid;
  gap: 2rem;
  align-items: center;
}
.signal-room {
  display: grid;
  gap: 0.5rem;
  justify-items: center;
  padding: 2.5rem 1.25rem;
  border: 1px solid var(--signal-line-strong);
  border-radius: 20px;
  background: var(--signal-raised);
  box-shadow: var(--signal-shadow);
  text-align: center;
  max-height: 36rem;
  overflow-y: auto;
}
/* Woken (HOST-5): the organism's own page stands in the room, which scrolls it in its own box. */
.signal-room[data-quo='drawn'],
.signal-room[data-quo='kept'] {
  display: block;
  padding: 0;
  text-align: start;
}
/* Not woken (HOST-19): the room says so in the page's words, the port's own reason under them, and offers the wipe. */
.signal-room-failed {
  display: none;
  gap: 0.5rem;
  justify-items: center;
}
.signal-room[data-quo='failed'] > :not(.signal-room-failed) {
  display: none;
}
.signal-room[data-quo='failed'] > .signal-room-failed {
  display: grid;
}
.signal-room-why {
  margin: 0;
  max-width: 34ch;
  color: var(--signal-muted);
  font-family: var(--signal-font-mono);
  font-size: var(--signal-size-tiny);
  overflow-wrap: anywhere;
}
.signal-room-why:empty {
  display: none;
}
.signal-room-wipe {
  display: grid;
  gap: 0.75rem;
  justify-items: center;
  margin-top: 0.75rem;
}
.signal-room-wipe > summary.signal-action {
  cursor: pointer;
  list-style: none;
}
.signal-room-wipe > summary.signal-action::-webkit-details-marker {
  display: none;
}
.signal-room-wipe > .signal-action-danger {
  margin-top: 0.75rem;
}
.signal-room-wipe[open] > summary.signal-action {
  display: none;
}
@container signal-site (min-width: 58rem) {
  .signal-band {
    padding-block: 5rem;
  }
  .signal-band-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 3.5rem;
  }
}

/* A field and its press, where a page asks a person something. */
.signal-fields {
  display: grid;
  gap: 0.75rem;
  max-width: 26rem;
  margin: 0;
  padding: 0;
  border: 0;
}
.signal-label {
  color: var(--signal-text);
  font-size: var(--signal-size-small);
  font-weight: 600;
}
.signal-field {
  box-sizing: border-box;
  width: 100%;
  min-height: 2.75rem;
  padding: 0 0.875rem;
  border: 1px solid var(--signal-line-strong);
  border-radius: var(--signal-radius);
  background: var(--signal-raised);
  color: var(--signal-text);
  font: inherit;
}

/* The foot. */
.signal-foot {
  padding-block: 2.5rem 3.5rem;
  border-top: 1px solid var(--signal-line);
  font-size: var(--signal-size-small);
}
.signal-foot-row {
  display: grid;
  gap: 1.5rem;
}
.signal-foot-held {
  max-width: 26rem;
  margin: 0.75rem 0 0;
  color: var(--signal-muted);
}
.signal-foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.signal-foot-link {
  color: var(--signal-body);
  text-decoration: none;
}
.signal-foot-link:hover {
  color: var(--signal-text);
}
@container signal-site (min-width: 58rem) {
  .signal-foot-row {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
  }
}