/* Try Autonomi, in the Autonomi brand system.
   Source of truth: github.com/WithAutonomi/brand (private) — BRAND.md and
   dist/tokens.flat.json. Values here are the brand's semantic tokens under this
   page's own names; where a default is bent it says so and why.

   The seven WOFF2 cuts below are included with the owner's approval and
   self-hosted. Method and FK Roman remain commercial fonts; Inter and
   IBM Plex Mono are OFL. */

/* Primary — Method. Foundry weights are its own: Regular is 500, Medium 600. */
@font-face {
  font-family: "Method";
  src: url("fonts/Method-Regular.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: "Method";
  src: url("fonts/Method-Medium.woff2") format("woff2");
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "FK Roman Standard";
  src: url("fonts/FKRomanStandard-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

/* Body — Inter */
@font-face {
  font-family: "Inter";
  src: url("fonts/Inter-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("fonts/Inter-Bold.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

/* Mono — IBM Plex Mono */
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/IBMPlexMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/IBMPlexMono-Medium.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

:root {
  --paper: var(--page-background);
  --page: #ebeff5;
  --paper-raised: #ffffff;
  --ink-inverse: #ffffff;

  /* Voice and structure. Black is gone: the brand keeps it for icon strokes,
     never text. */
  --ink: #232a59;
  --ink-soft: rgba(35, 42, 89, 0.8);
  --rule: rgba(35, 42, 89, 0.25);
  --edge: #c5cdd7;
  --grey-500: #8994a3;
  --control-edge: #232a59;

  /* Red-deep for small text and errors. */
  --signal: #e91337;
  --signal-text: #e91337;

  /* Data is moving: status.live, with status.live-pulse behind a live dot. The
     green is a fill, so meaningful marks carry a blue edge to clear 3:1. */
  --live: #97ffa0;
  --live-edge: #232a59;
  --live-pulse: #03e916;
  --status-attention: #8bc5ff;
  --live-soft: rgba(151, 255, 160, 0.35);

  --focus: #232a59;
  --action-primary: #232a59;
  --action-hover: #97ffe7;
  /* Jim's approved page blue and 80% aqua-on-white hero. */
  --page-background: #cfecfb;
  --hero-background: color-mix(in srgb, var(--action-hover) 80%, var(--paper-raised));
  --masthead-background: var(--paper-raised);
  --status-background: var(--page);
  --headline-colour: var(--ink);
  --card-rule: color-mix(in srgb, var(--page) 80%, transparent);
  --card-shadow: 0 6px 5px rgba(0, 0, 0, 0.04), 0 1px 10px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.04);

  /* Five connection phases, ordered setup -> payload, built only from named
     values: the two greys, the blue at opacity.state, the blue, and the live
     green. A ramp for data like this is a gap in the system. */
  --wf-ice: #8994a3;
  --wf-dtls: rgba(35, 42, 89, 0.62);
  --wf-handshake: rgba(35, 42, 89, 0.8);
  --wf-lookup: #232a59;
  --wf-chunk: #97ffa0;

  --serif: "Method", "Inter", sans-serif;
  --display-serif: "FK Roman Standard", Georgia, serif;
  --sans: "Inter", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  /* Body sizes follow the brand; Jim specified the desktop hero at 64px. */
  --step--1: 0.8125rem;
  --step-0: 1rem;
  --step-1: 1.125rem;
  --step-2: 1.75rem;
  --step-3: 4rem;

  --gutter: clamp(1.1rem, 0.6rem + 2.2vw, 3rem);
  --measure: 34rem;
  --radius-button: 6px;
  --radius-pill: 999px;
  /* One palette, like autonomi.com: no dark variant. */
  color-scheme: light only;
}

:root[data-palette="alternate"] {
  --masthead-background: #cfecfb;
  --hero-background: #f7fcff;
  --page-background: color-mix(in srgb, var(--action-hover) 70%, var(--hero-background));
  --status-background: var(--paper-raised);
  --headline-colour: var(--signal-text);
  background: var(--hero-background);
}

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

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

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

body {
  margin: 0;
  background: var(--page-background);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.6;
  padding-inline: var(--gutter);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.3;
  /* Method's own weights: Regular is 500, Medium 600. */
  font-weight: 500;
  letter-spacing: -0.02em;
}

p {
  margin: 0;
}

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

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

:focus-visible {
  outline: 2.5px solid var(--focus);
  outline-offset: 3px;
}

/* Jim's Figma buttons: Method Medium, 38px high, with an inside stroke. */
button {
  font: inherit;
  cursor: pointer;
}

.primary,
.quiet {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
  border-radius: var(--radius-button);
  height: 38px;
  padding: 7px 15px;
  line-height: 24px;
  border: 0;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease, transform 140ms ease;
}

@media (pointer: coarse) {
  .primary,
  .quiet {
    min-height: 44px;
  }
}

/* Solid blue: the action that matters. */
.primary {
  background: var(--action-primary);
  color: var(--paper-raised);
}

/* The hollow voice: Method Medium, Title Case, a 1px blue border, no fill. */
.quiet {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--ink);
}

.primary:hover:not(:disabled),
.quiet:hover:not(:disabled),
#save-link:hover {
  background: var(--paper-raised);
  box-shadow: inset 0 0 0 1px var(--ink);
  color: var(--ink);
}

.home-link.quiet:hover {
  background: var(--action-hover);
  box-shadow: none;
}

.primary:active:not(:disabled),
.quiet:active:not(:disabled) {
  transform: translateY(1px);
}

.primary:disabled,
.quiet:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

#get-button {
  width: 89px;
  white-space: nowrap;
  text-transform: capitalize;
}

.address-form:has(#cancel-button:not([hidden])) #get-button {
  width: auto;
}

#get-button:disabled {
  background: color-mix(in srgb, var(--ink) 10%, var(--hero-background));
  color: color-mix(in srgb, var(--ink) 60%, var(--hero-background));
  opacity: 1;
}


/* Masthead */

.masthead {
  position: relative;
  z-index: 1;
  margin-inline: calc(-1 * var(--gutter));
  padding: 1.25rem;
  padding-bottom: 0;
  background: var(--masthead-background);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem 1.5rem;
}

.home-link {
  justify-self: start;
  padding-left: 8px;
  gap: 10px;
}

.home-arrow {
  width: 24px;
  height: 24px;
  flex: none;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--ink);
  justify-self: center;
  gap: 0.625rem;
}

.wordmark-logo {
  display: block;
  width: auto;
  height: 1.5rem;
}

.wordmark-try {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1;
  color: var(--ink);
}

/* Grey status surface against the white masthead, as in Jim's mock-up. */
.network-status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 5px 8px 5px 7px;
  border-radius: var(--radius-button);
  background: var(--status-background);
  justify-self: end;
  min-width: 0;
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink);
}

.status-light {
  position: relative;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--status-attention);
  flex: none;
  isolation: isolate;
}

.network-status[data-state="ready"] .status-light,
.network-status[data-state="busy"] .status-light {
  background: var(--live);
}

/* The pulse behind a live dot is the signal green, and only there. */
.network-status[data-state="ready"] .status-light::after,
.network-status[data-state="busy"] .status-light::after {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: var(--live-pulse);
  animation: statusPulse 2s ease-out infinite;
  z-index: -1;
}

.network-status[data-state="error"] .status-light {
  background: var(--signal);
  border-color: var(--signal);
}

@keyframes statusPulse {
  from {
    transform: scale(0.45);
    opacity: 0.8;
  }

  to {
    transform: scale(1);
    opacity: 0;
  }
}

main {
  max-width: 78rem;
  margin: 0 auto;
}

/* Stage */

/* Full-width colour bands. */
.stage,
.outcome {
  background: var(--paper);
  margin-inline: calc(50% - 50vw);
  padding-inline: max(var(--gutter), calc(50vw - 39rem + var(--gutter)));
}

.stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr);
  grid-template-areas: "intro featured" "form featured";
  grid-template-rows: auto 1fr;
  column-gap: clamp(2rem, 7.5vw, 7rem);
  align-items: start;
  padding-inline: max(var(--gutter), calc((100vw - 89rem) / 2 + var(--gutter)));
  padding-block: 148px 16px;
  background: var(--hero-background);
}

.stage::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: clamp(90px, 14vw, 200px);
  background: var(--masthead-background);
  mask: url("top-fade.png") center / 100% 100% no-repeat;
  mask-mode: alpha;
  pointer-events: none;
}

.stage > * {
  position: relative;
}

.stage-copy {
  grid-area: intro;
  display: grid;
  gap: 0;
  min-width: 0;
}

/* What came back, beside the network that fetched it. */
.outcome {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
  padding-block: clamp(1.25rem, 3vw, 2.5rem);
  scroll-margin-top: 1rem;
}

/* Before a file is asked for there is nothing to show on the left, so the
   picture of the network takes the whole band. */
.outcome:has(> .result[hidden]) {
  grid-template-columns: minmax(0, 1fr);
  justify-items: center;
}

.outcome:has(> .result[hidden]) .map {
  max-width: 42rem;
  width: 100%;
}

.eyebrow {
  display: block;
  margin-bottom: 3rem;
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

h1 {
  font-family: var(--display-serif);
  font-size: var(--step-3);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--headline-colour);
  text-wrap: balance;
}

.lede {
  font-size: var(--step-0);
  line-height: 1.55;
  color: var(--ink);
  margin-block: 1rem 2rem;
}

/* Address plate */

.address-form {
  grid-area: form;
  min-width: 0;
  display: grid;
  gap: 12px;
}

.address-label {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--card-rule);
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.address-plate,
.preview,
.waterfall-scroll,
.event-log {
  background: var(--paper-raised);
  border-radius: 10px;
  box-shadow: var(--card-shadow);
}

.address-plate {
  overflow: clip;
}

.address-plate:focus-within {
  outline: 2.5px solid var(--focus);
  outline-offset: 3px;
}

.address-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: end;
  gap: 0.5rem;
  padding: 18px 15px;
}

.address-plate textarea {
  display: block;
  resize: none;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1.3;
  letter-spacing: 0.1em;
  width: 100%;
  max-width: 100%;
  word-break: break-all;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

@media (min-width: 861px) and (max-width: 1200px) {
  .address-plate textarea {
    height: 4.3em;
  }
}

.address-plate textarea::placeholder {
  color: color-mix(in srgb, var(--ink) 30%, var(--paper-raised));
  opacity: 1;
}

.address-count {
  justify-self: end;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--ink);
}

.address-help {
  padding-inline: 15px;
  font-size: 12px;
  color: var(--ink-soft);
}

.form-actions,
.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.4rem;
}

.address-form > .form-actions {
  margin: 4px 0 0 5px;
}

.form-error {
  border-left: 3px solid var(--signal);
  padding: 0.5rem 0 0.5rem 0.9rem;
  color: var(--ink);
}

/* Result */

.result {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.result h2,
.featured h2 {
  font-family: var(--serif);
  font-size: var(--step-2);
  letter-spacing: -0.02em;
}

.result h2:focus {
  outline: none;
}

.result h2:focus-visible {
  outline: 2.5px solid var(--focus);
}

.preview {
  overflow: hidden;
  display: grid;
  place-items: center;
  min-height: 6rem;
}

.preview img,
.preview video {
  display: block;
  max-width: 100%;
  max-height: 26rem;
  width: auto;
  height: auto;
}

.preview audio {
  width: 100%;
  padding: 1rem;
}

.preview pre {
  margin: 0;
  width: 100%;
  max-height: 20rem;
  overflow: auto;
  padding: 1rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.preview-note {
  padding: 1.25rem;
  color: var(--ink-soft);
  text-align: center;
}

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr));
  gap: 0.85rem 1.25rem;
  margin: 0;
}

.facts div {
  min-width: 0;
}

.facts dt {
  font-family: var(--mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.15rem;
}

.facts dd {
  margin: 0;
  font-weight: 700;
  font-size: 1.05rem;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.facts .fact-wide {
  grid-column: 1 / -1;
}

.facts .fact-wide dd {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 400;
  word-break: break-all;
}

/* Featured files */

.featured {
  grid-area: featured;
  display: grid;
  gap: 1.25rem;
}

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

.featured-list button {
  position: relative;
  isolation: isolate;
  width: calc(100% + 30px);
  margin-inline: -15px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  padding: 1rem 15px;
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.9rem;
  text-align: left;
  font-weight: 400;
  font-size: var(--step-0);
  min-height: 3.6rem;
}

.featured-list button::before {
  content: "";
  position: absolute;
  inset: 0 15px;
  border-bottom: 1px solid var(--rule);
  pointer-events: none;
  z-index: -1;
}

.featured-list button:is(:hover, :focus-visible)::before {
  inset-inline: 0;
  background: color-mix(in srgb, var(--grey-500) 20%, transparent);
  border-block: 1px solid var(--grey-500);
}

/* The highlighted row owns the shared edge; do not stack two separators. */
.featured-list:has(> li:first-child > button:is(:hover, :focus-visible)) {
  border-top-color: transparent;
}

.featured-list > li:has(+ li > button:is(:hover, :focus-visible)) > button::before {
  border-bottom-color: transparent;
}

.featured-list button:is(:hover, :focus-visible) .featured-glyph {
  background: var(--ink);
  color: transparent;
}

.featured-list button:is(:hover, :focus-visible) .featured-glyph::after {
  opacity: 1;
}

.featured-glyph {
  position: relative;
  width: 2.6rem;
  height: 2.6rem;
  background: transparent;
  border: 1px solid var(--ink);
  border-radius: var(--radius-button);
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--ink);
}

.featured-glyph::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("download.svg") center / 17px 22px no-repeat;
  opacity: 0;
  pointer-events: none;
}

.featured-name {
  font-weight: 700;
  display: block;
}

.featured-note {
  display: block;
  font-size: var(--step--1);
  color: var(--ink-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.featured-size {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.featured-empty {
  padding: 0.85rem 0;
  color: var(--ink-soft);
}

.featured-more {
  display: none;
  font-size: var(--step--1);
}

/* The ring */

.map {
  margin: 0;
  position: sticky;
  top: 1rem;
  display: grid;
  gap: 1rem;
}

#ring {
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1;
  display: block;
  overflow: visible;
}

/* You: a solid mark at the middle, with a slow ring going out from it while
   something is happening. */
.ring-browser {
  fill: var(--ink);
  stroke: none;
}

.ring-browser-glow {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
}

.ring-browser-glow {
  animation: browserPulse 8s ease-out infinite;
}

#ring[data-busy="true"] .ring-browser-glow {
  animation-duration: 2.6s;
}

@keyframes browserPulse {
  from {
    transform: scale(0.78);
    opacity: 0.35;
  }
  to {
    transform: scale(1.55);
    opacity: 0;
  }
}

.ring-browser-label {
  fill: var(--ink-inverse);
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 800;
  text-anchor: middle;
}

.ring-browser-sub {
  fill: var(--ink-inverse);
  opacity: 0.72;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.02em;
  text-anchor: middle;
}

/* The thread back to you. Strokes are kept at their screen width so the swarm
   stays drawn with the same line however far the view has pulled back. */
.ring-link {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1;
  opacity: 0.55;
  vector-effect: non-scaling-stroke;
  transition: opacity 260ms ease, stroke 260ms ease;
}

.ring-link[data-state="answered"] {
  opacity: 0.8;
}

.ring-link[data-state="serving"] {
  stroke: var(--ink);
  stroke-width: 1.6;
  opacity: 0.75;
}

.ring-link[data-state="failed"] {
  stroke: var(--signal);
  stroke-dasharray: 2 5;
  opacity: 0.45;
}

/* The swarm pulls back as it grows, so a busy network stays readable. */
.swarm-scene {
  transition: transform 900ms cubic-bezier(0.22, 0.8, 0.3, 1);
}

/* And it always turns, very slowly, so the page is never quite still. One turn
   for the whole swarm, so the room between bubbles is kept exactly. */
.swarm-sway {
  transform-origin: 320px 320px;
  animation: swarmSway 44s ease-in-out infinite alternate;
}

@keyframes swarmSway {
  from {
    transform: rotate(-2.4deg);
  }

  to {
    transform: rotate(2.4deg);
  }
}

/* Distance from you is the state; size and fill say the same thing again. */
.ring-node {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 1.4;
  vector-effect: non-scaling-stroke;
  transform-box: fill-box;
  transform-origin: center;
  transition: r 420ms cubic-bezier(0.22, 0.8, 0.3, 1), fill 260ms ease, stroke 260ms ease, opacity 260ms ease;
}

/* Every node that got as far as a connection keeps a beat of its own, so a
   swarm waiting on an answer never looks like a dead one. It beats at working
   pace while the moment on screen is a live one, and idles the rest of the
   time rather than stopping. */
.ring-node[data-state="open"],
.ring-node[data-state="answered"],
.ring-node[data-state="serving"] {
  animation: heartbeat 8s ease-in-out infinite;
  animation-delay: var(--beat, 0s);
}

#ring[data-busy="true"] .ring-node[data-state="open"],
#ring[data-busy="true"] .ring-node[data-state="answered"],
#ring[data-busy="true"] .ring-node[data-state="serving"] {
  animation-duration: 3.2s;
}

@keyframes heartbeat {
  0%,
  58%,
  100% {
    transform: scale(1);
  }

  70% {
    transform: scale(1.16);
  }

  84% {
    transform: scale(1.03);
  }
}

.ring-node[data-state="known"] {
  opacity: 0.62;
}

.ring-node[data-state="open"] {
  stroke-width: 2.4;
}

.ring-node[data-state="answered"] {
  fill: var(--ink);
}

.ring-node[data-state="serving"] {
  fill: var(--live);
  stroke: var(--live-edge);
  stroke-width: 2;
}

.ring-node[data-state="failed"] {
  fill: none;
  stroke: var(--signal-text);
  stroke-dasharray: 2 3;
  opacity: 0.9;
}

.ring-node-halo {
  fill: var(--live-soft);
  stroke: none;
}

/* A bubble pops when it arrives. */
.ring-bubble {
  transform-box: fill-box;
  transform-origin: center;
}

.ring-bubble.is-arriving {
  animation: bubblePop 520ms cubic-bezier(0.2, 1.5, 0.35, 1);
}

@keyframes bubblePop {
  from {
    opacity: 0;
    scale: 0.2;
  }
  62% {
    opacity: 1;
    scale: 1.3;
  }
  to {
    opacity: 1;
    scale: 1;
  }
}

/* An arrival, and every step a node takes after it, sends out one wave. The
   stroke keeps its screen width, so a wave reads the same however far the view
   has pulled back. */
.ring-ripple {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  transform-box: fill-box;
  transform-origin: center;
  animation: ripple 900ms ease-out forwards;
}

@keyframes ripple {
  from {
    transform: scale(1);
    opacity: 0.6;
  }
  to {
    transform: scale(var(--reach, 3));
    opacity: 0;
  }
}

/* Travelling dots mean one thing only: chunk data on its way to you. Live,
   on, moving — the brand keeps signal green for dots, and this is dots. */
.ring-packet {
  fill: var(--live-pulse);
  stroke: var(--live-edge);
  stroke-width: 0.75;
  vector-effect: non-scaling-stroke;
}

figcaption {
  display: grid;
  gap: 0.85rem;
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.map-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.legend-swatch {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  border: 1.5px solid var(--ink);
  background: var(--paper);
}

.legend-swatch.known {
  opacity: 0.62;
}

.legend-swatch.answered {
  background: var(--ink);
}

.legend-swatch.serving {
  background: var(--live);
  border-color: var(--live-edge);
}

.legend-swatch.failed {
  border: 2px dashed var(--signal);
}

/* A soft sky wash marks a change of section, like the front page */

.wash {
  height: clamp(1.5rem, 4vw, 3rem);
  border-bottom: 1px solid var(--rule);
}

.stage + .wash {
  position: relative;
  height: clamp(90px, 14vw, 200px);
  margin-inline: calc(50% - 50vw);
  border: 0;
  background: linear-gradient(var(--hero-background), var(--page-background));
}

.stage + .wash::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--page-background);
  mask: url("bottom-fade.png") center / 100% 100% no-repeat;
  mask-mode: alpha;
  pointer-events: none;
}

.stage + .wash[data-fade-active="true"] {
  background: var(--hero-background);
}

.stage > .fade-canvas,
.stage + .wash > .fade-canvas {
  position: absolute;
  inset: 0 0 auto;
  width: 100%;
  image-rendering: pixelated;
  pointer-events: none;
  display: none;
  z-index: 0;
}

.stage:has(> .fade-canvas) > :not(.fade-canvas) {
  z-index: 1;
}

[data-fade-active="true"]::before {
  display: none;
}

.stage[data-fade-active="true"] > .fade-canvas,
.stage + .wash[data-fade-active="true"] > .fade-canvas {
  display: block;
}

/* Lift the white transition under the masthead without moving stage content. */
.stage::before,
.stage > .fade-canvas {
  top: calc(clamp(90px, 14vw, 200px) * -0.16);
}

/* What this tab is doing: one live line under the circle */

.narration {
  display: grid;
  gap: 0.75rem;
  min-height: 7.5rem;
  align-content: start;
}

.rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.4rem;
}

.rail li {
  flex: 1 1 0;
  display: flex;
}

.rail-step {
  flex: 1 1 auto;
  height: 3px;
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 2px;
  /* A step not yet reached still has to be seen against the cream. */
  background: rgba(35, 42, 89, 0.55);
  transition: background-color 300ms ease, height 160ms ease;
  cursor: default;
  position: relative;
}

/* A step you have already seen can be replayed. */
.rail-step:not(:disabled) {
  cursor: pointer;
}

.rail-step:not(:disabled)::after {
  content: "";
  position: absolute;
  inset: -0.7rem 0;
}

.rail-step:not(:disabled):hover {
  height: 7px;
}

.rail-step[data-inspecting="true"] {
  height: 7px;
  background: var(--ink);
}

.rail-step[data-state="active"] {
  background: var(--ink);
  height: 7px;
  animation: railPulse 1.4s ease-in-out infinite;
}

.rail-step[data-state="done"] {
  background: var(--ink);
}

.rail-step[data-state="failed"] {
  background: var(--signal);
}

@keyframes railPulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

.narration-line {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 1rem + 0.9vw, 1.7rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-wrap: balance;
}

.narration-live {
  justify-self: start;
  padding: 5px 12px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 0.8125rem;
  line-height: 1.3;
  border-radius: var(--radius-button);
  border: 1px solid var(--control-edge);
  background: transparent;
  color: var(--ink);
}

.narration-live:hover {
  background: var(--action-hover);
  border-color: var(--action-hover);
}

.narration-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1.5rem;
  margin: 0;
  min-height: 2.4rem;
}

.narration-facts div {
  display: grid;
  gap: 0.1rem;
  animation: narrationIn 320ms ease backwards;
}

.narration-facts dt {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0;
}

.narration-facts dd {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.journey {
  padding-block: 0.5rem 3rem;
  display: grid;
  gap: 1.5rem;
}

.journey-total {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  min-height: 1.2em;
}

/* Waterfall */

.waterfall {
  position: relative;
  display: grid;
  gap: 0.9rem;
}

.waterfall-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 2rem;
}

.waterfall h3 {
  font-family: var(--serif);
  font-size: var(--step-2);
  letter-spacing: -0.02em;
}

.waterfall-note {
  color: var(--ink-soft);
  font-size: var(--step--1);
  max-width: 44rem;
}

.waterfall-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--ink-soft);
}

.waterfall-legend li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.waterfall-swatch {
  width: 0.9rem;
  height: 0.55rem;
  border-radius: 2px;
}

.waterfall-scroll {
  overflow-x: auto;
}

.waterfall-plot {
  min-width: 40rem;
  padding: 0.5rem 1rem 0.9rem;
}

.waterfall-axis {
  position: relative;
  height: 1.6rem;
  margin-left: 9rem;
  border-bottom: 1px solid var(--rule);
}

.waterfall-tick {
  position: absolute;
  bottom: 0.3rem;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.waterfall-tick:first-child {
  transform: none;
}

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

.waterfall-row {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  align-items: center;
  min-height: 1.35rem;
  border-radius: 0.25rem;
}

.waterfall-row:hover,
.waterfall-row:focus-visible {
  background: color-mix(in srgb, var(--ink) 6%, transparent);
}

.waterfall-label {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--ink-soft);
  padding-right: 0.6rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.waterfall-track {
  position: relative;
  height: 0.9rem;
}

.waterfall-life {
  position: absolute;
  top: 50%;
  height: 1px;
  background: var(--edge);
}

.waterfall-bar {
  position: absolute;
  top: 0.1rem;
  height: 0.7rem;
  border-radius: 2px;
  box-shadow: 0 0 0 1px var(--paper-raised);
}

/* Still running: marked by an open end, not by fading the colour out. The
   marker is the surface colour, which clears 3:1 against every bar fill. */
.waterfall-bar.is-open {
  border-right: 2px dashed var(--paper-raised);
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.kind-ice {
  background: var(--wf-ice);
}

.kind-dtls {
  background: var(--wf-dtls);
}

.kind-handshake {
  background: var(--wf-handshake);
}

.kind-lookup {
  background: var(--wf-lookup);
}

.kind-chunk {
  background: var(--wf-chunk);
  box-shadow: inset 0 0 0 1px var(--live-edge);
}

.waterfall-empty {
  padding: 1rem 0 0.4rem 9rem;
  color: var(--ink-soft);
  font-size: var(--step--1);
}

.waterfall-tip {
  position: absolute;
  z-index: 2;
  max-width: 22rem;
  padding: 0.45rem 0.65rem;
  border-radius: 0.5rem;
  background: var(--ink);
  color: var(--ink-inverse);
  font-size: 0.78rem;
  line-height: 1.4;
  pointer-events: none;
}

/* Event log */

.event-log summary {
  cursor: pointer;
  padding: 0.95rem 1.1rem;
  font-weight: 700;
}

.log-note {
  padding: 0 1.1rem 0.75rem;
  font-size: var(--step--1);
  color: var(--ink-soft);
  max-width: 48rem;
}

.log-lines {
  list-style: none;
  margin: 0;
  padding: 0.75rem 1.1rem 1.1rem;
  border-top: 1px solid var(--rule);
  max-height: 24rem;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.8;
}

.log-lines li {
  display: grid;
  grid-template-columns: 5.2rem minmax(0, 1fr);
  gap: 0.75rem;
}

.log-time {
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.log-text {
  overflow-wrap: anywhere;
}

.log-lines li[data-kind="fault"] .log-text {
  color: var(--signal-text);
}

.log-lines li[data-kind="data"] .log-text {
  color: var(--ink);
  font-weight: 500;
}

/* Fine print */

.fine-print {
  border-top: 1px solid var(--rule);
  padding-block: 2rem 4rem;
  display: grid;
  gap: 1.25rem;
}

.fine-print-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1.5rem 2.5rem;
}

.fine-print-grid > div {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

.fine-print h2 {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 500;
}

.fine-print p {
  color: var(--ink-soft);
  font-size: var(--step-0);
  max-width: 30rem;
}

.fine-print-grid > div > a {
  margin-top: auto;
  padding-top: 0.25rem;
}

/* Narrow screens */

@media (max-width: 1100px) {
  .network-status {
    grid-column: 1 / -1;
    justify-self: center;
  }
}

@media (max-width: 860px) {
  .stage {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "intro" "featured" "form";
    grid-template-rows: auto;
    row-gap: 2rem;
  }

  .lede {
    margin-bottom: 0;
  }

  .map {
    position: static;
    max-width: 34rem;
    margin-inline: auto;
    width: 100%;
  }

  .outcome {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 600px) {
  .masthead {
    padding: 1rem 0.75rem 0;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 0.5rem;
  }

  .wordmark {
    justify-self: end;
    gap: 0.5rem;
  }

  .wordmark-logo {
    height: 1.25rem;
  }

  h1 {
    font-size: clamp(2.5rem, 9vw, 4rem);
  }

  .address-plate textarea {
    min-height: 4.3em;
    font-size: 1rem;
  }

  /* Keep the centre label inside its disc. */
  .ring-browser-label {
    font-size: 18px;
  }

  .ring-browser-sub {
    font-size: 11px;
  }

  /* The status pill keeps its shape and its one line; at 13px tracked 0.15em
     this label wraps on a phone, so the type steps down rather than the pill. */
  .network-status {
    font-size: 0.625rem;
    letter-spacing: 0.1em;
  }
}

@media (max-width: 480px) {
  .result-actions > * {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}