/* Follow an Alert: visual foundation (Stage 12).
   1. Tokens  2. Base  3. Layout  4. Components  5. Journey  6. State treatments  7. Motion */

/* ---------- 1. Tokens ---------- */
:root {
  /* Colour: light surfaces */
  --paper: #f6f2ea;          /* warm off-white page */
  --surface: #fffdf8;        /* cards */
  --surface-sunk: #efe9de;   /* inputs, quiet fills */
  --ink: #14213d;            /* dark navy text */
  --ink-soft: #4a5470;       /* secondary text (≥ 4.5:1 on paper) */
  --line: #d9d0c1;
  --line-strong: #b9ae9b;

  /* Colour: journey canvas (navy) */
  --navy: #13213f;
  --navy-raised: #1b2c50;
  --navy-line: #33466f;
  --on-navy: #f5f0e6;
  --on-navy-soft: #bcc6da;

  /* Colour: roles */
  --teal: #0d7068;           /* primary action (white text 5.8:1) */
  --teal-strong: #0a5852;
  --teal-tint: #dcefeb;
  --teal-on-navy: #5fd4c4;
  --amber: #8a4b06;          /* waiting text on light (≥ 4.5:1) */
  --amber-tint: #fbedd2;
  --amber-on-navy: #f6c46a;
  --red: #a3261b;            /* failure text on light */
  --red-tint: #f9e3df;
  --red-on-navy: #ffa294;
  --grey-on-navy: #8f9bb6;

  /* Typography (system fonts only; no downloads) */
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", Consolas, "SFMono-Regular", Menlo, monospace;
  --text-xs: 0.8125rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  --leading: 1.55;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;

  /* Shape and depth */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 1px 2px rgb(20 33 61 / 0.06), 0 6px 20px rgb(20 33 61 / 0.06);
  --shadow-journey: 0 10px 30px rgb(19 33 63 / 0.22);

  /* Focus: dark ring on light surfaces; redefined to a light ring inside the navy journey */
  --focus-color: #14213d;
  --focus-ring: 3px solid var(--focus-color);
  --focus-offset: 2px;

  /* Motion tokens. Journey motion (journey-motion.js) is gated in JavaScript; this rule covers CSS animation. */
  --motion-fast: 150ms;
  --motion-base: 300ms;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);

  --shell-max: 78rem;
  color-scheme: light;
}

/* ---------- 2. Base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: var(--text-base)/var(--leading) var(--font-body);
}
h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.2; margin: 0; }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
p { margin: var(--space-2) 0; }
a { color: var(--teal-strong); text-underline-offset: 0.15em; }
code, pre { font-family: var(--font-mono); font-size: 0.9em; }
code { overflow-wrap: anywhere; }
:focus-visible { outline: var(--focus-ring); outline-offset: var(--focus-offset); border-radius: 2px; }

.hint { color: var(--ink-soft); font-size: var(--text-sm); margin: var(--space-1) 0; }
.small { font-size: var(--text-sm); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link { position: absolute; left: -999px; top: 0; }
.skip-link:focus { left: var(--space-4); top: var(--space-4); background: var(--surface); padding: var(--space-2) var(--space-3); z-index: 10; }

.icon { width: 1.25em; height: 1.25em; flex: none; vertical-align: -0.25em; }

/* ---------- 3. Layout ---------- */
.shell { max-width: var(--shell-max); margin: 0 auto; padding: 0 var(--space-4); }
@media (min-width: 48rem) { .shell { padding: 0 var(--space-5); } }

.site-header { border-bottom: 1px solid var(--line); background: var(--paper); }
.header-row {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--space-2) var(--space-4); padding-top: var(--space-3); padding-bottom: var(--space-3);
}
.brand { display: flex; align-items: center; gap: var(--space-3); }
.brand h1 { font-size: var(--text-2xl); letter-spacing: -0.01em; }
.header-meta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-4); }
.header-link { font-size: var(--text-sm); font-weight: 600; }

.intro { font-size: var(--text-lg); max-width: 62ch; margin: var(--space-5) 0 var(--space-5); }

.workspace { display: grid; gap: var(--space-5); align-items: start; }
.journey-column { display: grid; gap: var(--space-5); min-width: 0; }
@media (min-width: 60rem) {
  .workspace { grid-template-columns: minmax(19rem, 25rem) minmax(0, 1fr); }
}

.experiments { margin-top: var(--space-7); }
.experiment-grid { display: grid; gap: var(--space-4); margin-top: var(--space-4); }
@media (min-width: 40rem) { .experiment-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 72rem) { .experiment-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

.technical { margin-top: var(--space-7); scroll-margin-top: var(--space-4); }
.technical-grid { display: grid; gap: var(--space-5); margin: var(--space-4) 0; }
@media (min-width: 48rem) { .technical-grid { grid-template-columns: 1fr 1fr; } }
.technical h3 { margin-bottom: var(--space-1); }

.site-footer { color: var(--ink-soft); font-size: var(--text-sm); padding-top: var(--space-6); padding-bottom: var(--space-6); max-width: 62rem; margin-left: auto; margin-right: auto; }
.footer-back { margin-top: var(--space-4); }
.footer-back a { display: inline-block; padding: var(--space-2) 0; font-weight: 600; color: var(--teal-strong); } /* 24 px+ target */

/* ---------- 4. Components ---------- */
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card); padding: var(--space-5); min-width: 0;
}
.card > h2 { margin-bottom: var(--space-3); }

.demo-label {
  font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  border: 1.5px solid var(--ink); border-radius: var(--radius-sm); padding: 0 var(--space-2); line-height: 1.6;
}

/* Status pill: icon + text, colour only reinforces the words */
.status-pill {
  display: inline-flex; align-items: center; gap: var(--space-2); margin: 0;
  font-size: var(--text-sm); font-weight: 600; border-radius: var(--radius-pill);
  padding: var(--space-1) var(--space-3); border: 1px solid currentColor;
  color: var(--state-ink, var(--ink-soft)); background: var(--state-tint, transparent);
}

/* Buttons */
button, input, textarea, select { font: inherit; color: inherit; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: 2.75rem; padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md); border: 1.5px solid var(--line-strong);
  background: var(--surface); color: var(--ink); font-weight: 600; cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--ink); }
.btn-primary { background: var(--teal); border-color: var(--teal); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--teal-strong); border-color: var(--teal-strong); }
.btn-quiet { background: transparent; }
.btn-link {
  background: none; border: 0; padding: 0; min-height: 0; color: var(--teal-strong);
  font-weight: 600; text-decoration: underline; text-underline-offset: 0.15em; cursor: pointer;
}
.btn:disabled, .btn-link:disabled, .btn[aria-disabled="true"] { opacity: 0.55; cursor: not-allowed; }
.button-row { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }

/* Forms */
label { display: block; font-weight: 600; margin-top: var(--space-4); }
label .hint { font-weight: 400; margin-left: var(--space-1); }
input[type="text"], input:not([type]), textarea {
  width: 100%; margin-top: var(--space-1);
  background: var(--surface-sunk); border: 1.5px solid var(--line); border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
}
input:not([type]):hover, textarea:hover { border-color: var(--line-strong); }
textarea { resize: vertical; min-height: 5.5rem; }
.field-error { color: var(--red); font-size: var(--text-sm); font-weight: 600; margin: var(--space-1) 0 0; }
[aria-invalid="true"] { border-color: var(--red) !important; }

fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
legend { font-weight: 600; padding: 0; }
.choice-list { display: grid; gap: var(--space-2); margin-top: var(--space-2); }
.choice {
  display: flex; gap: var(--space-3); align-items: flex-start; margin: 0;
  font-weight: 400; border: 1.5px solid var(--line); border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3); cursor: pointer; background: var(--surface);
}
.choice:has(input:checked) { border-color: var(--teal); background: var(--teal-tint); }
.choice input { margin: 0.3rem 0 0; accent-color: var(--teal); width: 1.05rem; height: 1.05rem; flex: none; }
.choice strong { display: block; }
.choice span span { color: var(--ink-soft); font-size: var(--text-sm); }

.result { margin: var(--space-3) 0 0; min-height: 1.25rem; }
.result:empty { margin: 0; min-height: 0; }

/* Notices: plain sentence + optional technical line */
.notice {
  border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); margin: var(--space-2) 0;
  border-left: 4px solid var(--state-ink, var(--ink-soft)); background: var(--state-tint, var(--surface-sunk));
  color: var(--ink);
}
.notice strong { color: var(--state-ink, var(--ink)); }
.notice ul { margin: var(--space-1) 0 0; padding-left: 1.2rem; }
.notice-bad { --state-ink: var(--red); --state-tint: var(--red-tint); }

.banner {
  margin-top: var(--space-3); border-radius: var(--radius-md); padding: var(--space-3) var(--space-4);
  background: var(--amber-tint); color: var(--ink); border-left: 4px solid var(--amber);
}
.banner[hidden] { display: none; }

/* Session line inside the composer */
.session-box { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-3); margin-bottom: var(--space-2); }
.session-box p { margin: 0; }

/* Composer: sample cards, counters, preview, unconfirmed submission, receiver label (Stage 13) */
.presets legend { font-family: var(--font-display); font-size: var(--text-lg); }
.preset-list { display: grid; gap: var(--space-2); margin-top: var(--space-2); }
.preset {
  display: grid; grid-template-columns: auto auto minmax(0, 1fr); align-items: start; gap: var(--space-3);
  margin: 0; font-weight: 400; cursor: pointer; background: var(--surface);
  border: 1.5px solid var(--line); border-radius: var(--radius-md); padding: var(--space-3);
}
.preset:hover { border-color: var(--line-strong); }
.preset:has(input:checked) { border-color: var(--teal); background: var(--teal-tint); box-shadow: inset 4px 0 0 var(--teal); }
.preset:has(input:focus-visible) { outline: var(--focus-ring); outline-offset: var(--focus-offset); }
.preset input { margin: 0.2rem 0 0; accent-color: var(--teal); width: 1.05rem; height: 1.05rem; }
.preset .preset-icon { color: var(--teal-strong); width: 1.5rem; height: 1.5rem; }
.preset-text strong { display: block; }
.preset-text span { color: var(--ink-soft); font-size: var(--text-sm); }

.field-meta { margin: var(--space-1) 0 0; text-align: right; }
.counter { color: var(--ink-soft); font-size: var(--text-xs); }
.counter.over { color: var(--red); font-weight: 700; }

.preview { margin-top: var(--space-4); }
.preview-label { font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); margin: 0 0 var(--space-1); }
.message-card {
  background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--navy);
  border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); box-shadow: var(--shadow-card);
}
.message-card p { margin: 0; }
.message-card-tag { display: flex; align-items: center; gap: var(--space-1); font-size: var(--text-xs); font-weight: 600; color: var(--ink-soft); }
.message-card-title { font-weight: 700; margin-top: var(--space-1) !important; overflow-wrap: anywhere; }
.message-card-body { white-space: pre-wrap; overflow-wrap: anywhere; color: var(--ink); font-size: var(--text-sm); margin-top: var(--space-1) !important; }

.pending { margin-top: var(--space-3); }
.pending p { margin: 0 0 var(--space-2); }
.pending .button-row { margin-top: var(--space-2); }
.pending-alert q { font-weight: 600; overflow-wrap: anywhere; }

.receiver-label {
  display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: start; gap: var(--space-2);
  margin: var(--space-4) 0 0; padding-top: var(--space-3); border-top: 1px solid var(--line); font-size: var(--text-sm);
}
.receiver-label .icon { color: var(--teal-strong); margin-top: 0.1em; }
.receiver-label .receiver-hint { display: block; margin: var(--space-1) 0 0; }

.receiver-details { margin-top: var(--space-4); padding: var(--space-4) var(--space-5); }
.receiver-details > summary { cursor: pointer; font-weight: 600; color: var(--teal-strong); }
.receiver-details[open] > summary { margin-bottom: var(--space-3); }

/* Guided scenarios (Stage 16): one instruction at a time, above the journey. */
.guide { border-left: 4px solid var(--state-ink, var(--teal)); }
.guide[hidden] { display: none; }
.guide:focus-visible { outline: var(--focus-ring); outline-offset: var(--focus-offset); }
.guide-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--space-1) var(--space-3); }
.guide-title { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-lg); }
.guide-title .icon { color: var(--teal-strong); }
.guide-step { margin: 0; font-size: var(--text-sm); font-weight: 700; color: var(--state-ink, var(--ink-soft)); }
.guide-text { font-size: var(--text-lg); margin: var(--space-3) 0 0; max-width: 60ch; }
.guide .button-row { margin-top: var(--space-3); gap: var(--space-4); } /* room for the attention ring (6 px) */
.guide-foot { margin-top: var(--space-3); }

/* Guide cues (Stage 19): "Your turn" names the button to press, "Watch" the part of the journey to look at. The
   button or journey part gets a ring that pulses three times (about 4.5 s, set in app.js), then stays still. */
.guide-cue { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin: var(--space-3) 0 0; font-weight: 600; }
.guide-cue[hidden] { display: none; }
.cue-pill {
  display: inline-flex; align-items: center; gap: var(--space-1); padding: 0.15rem 0.65rem;
  border-radius: var(--radius-pill); font-size: var(--text-sm); font-weight: 700;
}
.cue-pill .icon { width: 1rem; height: 1rem; }
.cue-pill.is-turn { background: var(--teal); color: #fff; }
.cue-pill.is-watch { background: var(--teal-tint); color: var(--teal-strong); border: 1px solid var(--teal); }
.btn.cue-ring { box-shadow: 0 0 0 3px var(--surface), 0 0 0 6px var(--teal); }
.btn.cue-pulse { animation: cue-pulse 1.5s ease-out 3; }
@keyframes cue-pulse {
  from { box-shadow: 0 0 0 3px var(--surface), 0 0 0 6px var(--teal), 0 0 0 6px rgb(13 112 104 / 0.55); }
  to { box-shadow: 0 0 0 3px var(--surface), 0 0 0 6px var(--teal), 0 0 0 22px rgb(13 112 104 / 0); }
}
.jd-node.cue-ring { box-shadow: 0 0 0 3px var(--navy), 0 0 0 5px var(--teal-on-navy); }
.jd-node.cue-pulse { animation: cue-pulse-navy 1.5s ease-out 3; }
@keyframes cue-pulse-navy {
  from { box-shadow: 0 0 0 3px var(--navy), 0 0 0 5px var(--teal-on-navy), 0 0 0 5px rgb(95 212 196 / 0.5); }
  to { box-shadow: 0 0 0 3px var(--navy), 0 0 0 5px var(--teal-on-navy), 0 0 0 20px rgb(95 212 196 / 0); }
}
/* Motion off (the page's control): no pulse, the still ring stays. The system setting is covered by the
   reduced-motion rule at the end of this file. */
html[data-motion="off"] .cue-pulse { animation: none; }

/* The journey and the guide stop a little below the top of the screen when scrolled to. */
#journey, #guide { scroll-margin-top: var(--space-4); }
.lock-reason { color: var(--ink-soft); }
.lock-reason:empty { display: none; }
.experiment.is-normal .exp-icon { color: var(--ink); }
#scenario-note:empty { display: none; }

/* The browser's scroll anchoring must not anchor inside the composer: a result appearing under Send alert would
   otherwise scroll the whole page, moving a focused history card in the other column. Anchoring then uses the
   journey and history, whose own redraws keep focus in place (keepFocus in app.js). */
.composer { overflow-anchor: none; }

/* Technical disclosure */
details.tech { margin-top: var(--space-3); font-size: var(--text-sm); }
details.tech > summary { cursor: pointer; font-weight: 600; color: var(--teal-strong); width: fit-content; padding: 0.3rem 0; } /* at least 24 px tall (WCAG 2.5.8) */
details.tech pre {
  background: var(--surface-sunk); border-radius: var(--radius-sm); padding: var(--space-3);
  overflow: auto; max-height: 22rem; white-space: pre-wrap; overflow-wrap: anywhere; font-size: var(--text-xs);
}
.tech-list { margin: var(--space-2) 0; padding-left: 1.1rem; }
.tech-list li { margin: var(--space-1) 0; overflow-wrap: anywhere; }

/* History (Stage 17): compact cards updated in place */
.history-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-1) var(--space-3); margin-bottom: var(--space-3); }
.history-head .hint { margin: 0; flex-basis: 100%; }
.history-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); overflow-anchor: auto; }
.history-card {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0 var(--space-3); align-items: center;
  border: 1.5px solid var(--line); border-radius: var(--radius-md); padding: var(--space-2) var(--space-3); background: var(--surface);
}
.history-card.is-selected { border-color: var(--ink); box-shadow: inset 4px 0 0 var(--ink); }
.history-card p { margin: 0; }
.hc-head { grid-column: 1 / -1; display: flex; align-items: baseline; gap: var(--space-2); min-width: 0; }
.hc-icon { color: var(--state-ink, var(--ink-soft)); align-self: center; }
.hc-title { font-family: var(--font-body); font-size: var(--text-base); font-weight: 600; overflow-wrap: anywhere; min-width: 0; }
.hc-time { color: var(--ink-soft); font-size: var(--text-sm); margin-left: auto !important; white-space: nowrap; }
.hc-delivery, .hc-processing, .hc-asof { grid-column: 1; font-size: var(--text-sm); }
.hc-delivery { color: var(--state-ink, var(--ink)); font-weight: 600; }
.hc-label { color: var(--ink-soft); font-weight: 400; }
.hc-asof { color: var(--ink-soft); }
.hc-view { grid-column: 2; grid-row: 2 / span 3; align-self: center; min-height: 2.5rem; padding: var(--space-1) var(--space-3); }
.hc-view[aria-current="true"] { border-color: var(--ink); }
.history-empty { color: var(--ink-soft); }
.history-more { margin-top: var(--space-3); }
.history-more:empty { display: none; }
.history-more .hint { margin: 0; }
@media (max-width: 30rem) { .hc-view { padding: var(--space-1) var(--space-2); font-size: var(--text-sm); } }

/* Outcome and timeline inside the journey */
.jo { margin-top: var(--space-4); border: 1px solid var(--navy-line); border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); }
.jo h4, .jd-history h4 { margin: 0 0 var(--space-2); font-size: var(--text-sm); color: var(--on-navy-soft); text-transform: uppercase; letter-spacing: 0.04em; }
.jo-row { display: grid; gap: 0 var(--space-3); margin-top: var(--space-2); }
@media (min-width: 40rem) { .jo-row { grid-template-columns: 13rem minmax(0, 1fr); } }
.jo-row p { margin: 0; }
.jo-label { color: var(--on-navy-soft); font-size: var(--text-sm); }
.jo-value strong { color: var(--state-on-navy, var(--on-navy)); }
.timeline { list-style: none; margin: var(--space-2) 0 0; padding: 0; display: grid; gap: var(--space-1); font-size: var(--text-sm); }
.tl-item { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--space-2); align-items: start; }
.tl-item .icon { color: var(--state-on-navy, var(--on-navy-soft)); margin-top: 0.1em; }
.tl-time { color: var(--on-navy-soft); white-space: nowrap; font-variant-numeric: tabular-nums; }
.delivery-group.is-current { border-left: 3px solid var(--teal-on-navy); padding-left: var(--space-3); }
.receiver-group { margin-top: var(--space-3); padding-top: var(--space-3); border-top: 1px dashed var(--navy-line); }
/* Phones: the time sits above its own entry, so it can't be read as belonging to the next one. */
@media (max-width: 30rem) {
  .tl-item { grid-template-columns: auto minmax(0, 1fr); gap: 0 var(--space-2); }
  .tl-item .icon { grid-row: 1 / span 2; }
  .tl-time { grid-column: 2; grid-row: 1; font-size: var(--text-xs); }
  .tl-text { grid-column: 2; grid-row: 2; }
  .tl-item + .tl-item { margin-top: var(--space-1); }
}

/* Technical details: terms with plain definitions */
.tech-terms { display: grid; gap: var(--space-1) var(--space-3); margin: var(--space-2) 0; }
@media (min-width: 40rem) { .tech-terms { grid-template-columns: 9rem minmax(0, 1fr); } }
.tech-terms dt { font-weight: 700; }
.tech-terms dd { margin: 0; }
.tech-terms code { display: block; }
.def { display: block; color: var(--ink-soft); font-size: var(--text-xs); }
.journey .def { color: var(--on-navy-soft); }
details.tech h5 { margin: var(--space-3) 0 var(--space-1); font-size: var(--text-sm); }
.tech-delivery { margin-top: var(--space-2); }
.tech-delivery p { margin: var(--space-1) 0; }

/* Experiments */
.experiment { display: flex; flex-direction: column; gap: var(--space-2); }
.experiment .exp-icon { color: var(--teal-strong); width: 2rem; height: 2rem; }
.experiment h3 { font-size: var(--text-lg); }
.experiment p { margin: 0; }
.experiment .button-row { margin-top: auto; padding-top: var(--space-2); }
.experiment ol { margin: var(--space-2) 0; padding-left: 1.2rem; }
.experiment .note { color: var(--ink-soft); font-size: var(--text-sm); }

/* ---------- 5. Journey (navy canvas) ---------- */
.journey {
  --focus-color: #f5f0e6;
  background: var(--navy); color: var(--on-navy); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-journey); padding: var(--space-5); min-width: 0;
  container-type: inline-size;
}
.journey a, .journey .btn-link, .journey details.tech > summary { color: var(--teal-on-navy); }
.journey-heading { font-size: var(--text-sm); font-family: var(--font-body); font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--on-navy-soft); }
.journey-title { font-size: var(--text-xl); margin: var(--space-2) 0 var(--space-1); overflow-wrap: anywhere; }
.journey-sub { color: var(--on-navy-soft); font-size: var(--text-sm); margin: 0 0 var(--space-5); }

/* Journey diagram (Stage 14): Your alert → Delivery service ⇄ Receiving system.
   Stacked on narrow panels; one row when the journey panel is at least 46rem wide.
   Nothing animates: arrows and words show direction, badges show state. */
.jd { display: grid; gap: var(--space-2); }
.jd-node {
  background: var(--navy-raised); border: 1px solid var(--navy-line); border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4); min-width: 0;
}
.jd-head { display: flex; align-items: center; gap: var(--space-2); }
.jd-icon {
  width: 2.25rem; height: 2.25rem; flex: none; border-radius: 50%; display: grid; place-items: center;
  border: 1.5px solid var(--on-navy-soft); color: var(--on-navy);
}
.jd-icon .icon { width: 1.15rem; height: 1.15rem; }
.jd-name { margin: 0; font-weight: 700; font-size: var(--text-sm); letter-spacing: 0.04em; text-transform: uppercase; color: var(--on-navy-soft); }
.jd-badge {
  display: inline-flex; align-items: center; gap: var(--space-2); margin: var(--space-2) 0 0;
  font-weight: 700; font-size: var(--text-lg); color: var(--state-on-navy, var(--on-navy));
}
.jd-detail { margin: var(--space-1) 0 0; font-weight: 600; overflow-wrap: anywhere; }
.jd-meta { margin: var(--space-1) 0 0; font-size: var(--text-sm); color: var(--on-navy-soft); }
.jd-next { color: var(--on-navy); }
.jd-delivery { border-color: var(--on-navy-soft); }
.jd-card {
  margin-top: var(--space-3); border: 1px dashed var(--navy-line); border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
}
.jd-card .jd-badge { margin-top: 0; font-size: var(--text-base); }
/* The alert title inside the node is clamped (the full title is the journey heading); long words break. */
.jd-alert-title { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; line-clamp: 3; overflow: hidden; overflow-wrap: anywhere; }
.jd-card-title { margin: 0 0 var(--space-1); font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--on-navy-soft); }

/* Links between components: a line with an arrowhead and a label. */
.jd-link { display: grid; gap: var(--space-1); justify-items: center; text-align: center; font-size: var(--text-sm); }
.jd-paths { gap: var(--space-2); }
.jd-path { display: grid; justify-items: center; gap: 0; color: var(--state-on-navy, var(--on-navy-soft)); }
.jd-path-name { font-size: var(--text-xs); font-weight: 700; color: var(--on-navy-soft); }
.jd-path-state { color: var(--state-on-navy, var(--on-navy)); font-weight: 600; }
.jd-handover .jd-path-state { color: var(--on-navy-soft); font-weight: 400; }
.jd-line { display: grid; place-items: center; color: var(--state-on-navy, var(--on-navy-soft)); }
.jd-arrow { width: 1.75rem; height: 1.75rem; transform: rotate(90deg); } /* stacked layout: forward = down */
.jd-ack .jd-arrow { transform: rotate(90deg); }                           /* arrow-left rotated = up */
.jd-path.is-current .jd-line { color: var(--teal-on-navy); }

@container (min-width: 40rem) {
  .jd {
    grid-template-columns: minmax(0, 1fr) 3.5rem minmax(0, 1.15fr) 7.5rem minmax(0, 1.15fr);
    align-items: center; gap: var(--space-2);
  }
  .jd-node { align-self: stretch; padding: var(--space-3); }
  .jd-badge { font-size: var(--text-base); }
  .jd-name { font-size: var(--text-xs); }
  .jd-handover .jd-path-state { font-size: var(--text-xs); }
  .jd-card { border: 0; border-top: 1px dashed var(--navy-line); border-radius: 0; padding: var(--space-2) 0 0; }
  .jd-path-state { font-size: var(--text-sm); }
  .jd-arrow, .jd-ack .jd-arrow { transform: none; width: 100%; height: 1.5rem; }
}

/* A reply that never arrived: a broken, neutral line with no arrowhead (never a red return arrow). */
.jd-path.is-unobserved .jd-line { color: var(--grey-on-navy); }
.jd-path.is-unobserved .jd-arrow { transform: rotate(90deg); }
@container (min-width: 40rem) { .jd-path.is-unobserved .jd-arrow { transform: none; } }

/* Retry wait: fills from the end of the last try to the scheduled next try. */
.jd-wait { margin-top: var(--space-2); height: 4px; border-radius: 2px; background: var(--navy-line); overflow: hidden; }
.jd-wait-fill { display: block; height: 100%; background: var(--amber-on-navy); transform-origin: left center; transform: scaleX(0); }
.jd-recover { margin-top: var(--space-3); min-height: 2.5rem; padding: var(--space-1) var(--space-3); }
/* In place of Deliver again while a guide owns the retry: points to the guide's Restore and retry. */
.jd-guide-hint { display: flex; align-items: flex-start; gap: var(--space-2); margin: var(--space-3) 0 0; font-size: var(--text-sm); font-weight: 600; color: var(--teal-on-navy); }
.jd-guide-hint .icon { flex: none; width: 1rem; height: 1rem; margin-top: 0.15rem; }
.jd-already { color: var(--on-navy); }

/* Motion (Stage 15): an overlay that is never redrawn by refreshes. Only transform and opacity move. */
.journey { position: relative; }
.journey-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-2); }
.motion-toggle {
  background: transparent; color: var(--on-navy); border: 1px solid var(--navy-line); border-radius: var(--radius-pill);
  padding: var(--space-1) var(--space-3); font-size: var(--text-xs); font-weight: 700; cursor: pointer; min-height: 2rem;
}
.motion-toggle:hover { border-color: var(--on-navy); }
.motion-toggle[aria-pressed="false"] { color: var(--on-navy-soft); }
.motion-note { margin: var(--space-1) 0 0; font-size: var(--text-xs); color: var(--on-navy-soft); }
.jm-layer { position: absolute; inset: 0; pointer-events: none; overflow: hidden; border-radius: var(--radius-lg); }
.jm {
  position: absolute; display: inline-flex; align-items: center; gap: var(--space-1); white-space: nowrap;
  font-size: var(--text-xs); font-weight: 700; border-radius: var(--radius-pill); padding: 0.2rem 0.55rem;
  opacity: 0; will-change: transform, opacity; box-shadow: 0 2px 8px rgb(0 0 0 / 0.35);
}
.jm .icon { width: 1rem; height: 1rem; }
.jm-history { background: var(--navy-raised); color: var(--on-navy); border: 1px solid var(--on-navy-soft); }
/* Travelling tokens (icon only, JourneyMotion.TOKEN = 18 px) and rings around nodes: illustrations stay off the text. */
.jm-token { width: 18px; height: 18px; padding: 0; justify-content: center; border-radius: 50%; box-sizing: border-box; }
.jm-token .icon { width: 12px; height: 12px; }
.jm-token.is-packet { background: var(--on-navy); color: var(--navy); }
.jm-token.is-done { background: var(--teal-on-navy); color: var(--navy); }
.jm-token.is-failed { background: var(--navy); color: var(--red-on-navy); border: 1px solid var(--red-on-navy); }
.jm-token.is-waiting { background: var(--navy); color: var(--amber-on-navy); border: 1px dashed var(--amber-on-navy); }
.jm-ring { padding: 0; background: transparent; box-shadow: none; border: 2px solid var(--teal-on-navy); border-radius: var(--radius-md); }

/* "Now" summary and history */
.jd-stale {
  display: flex; align-items: center; gap: var(--space-2); margin: 0 0 var(--space-3);
  background: var(--amber-tint); color: var(--ink); border-left: 4px solid var(--amber);
  border-radius: var(--radius-sm); padding: var(--space-2) var(--space-3); font-size: var(--text-sm); font-weight: 600;
}
.jd-now { margin-top: var(--space-4); border-left: 3px solid var(--teal-on-navy); padding: var(--space-1) 0 var(--space-1) var(--space-4); }
.jd-explain { margin: 0 0 var(--space-3); font-size: var(--text-base); }
.jd-facts { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: var(--space-1) var(--space-4); margin: 0; font-size: var(--text-sm); }
.jd-facts dt { color: var(--on-navy-soft); }
.jd-facts dd { margin: 0; font-weight: 600; }
.jd-now .hint { color: var(--on-navy-soft); margin-top: var(--space-2); }
.jd-history { margin-top: var(--space-4); }
.jd-history h4 { margin: 0 0 var(--space-2); font-size: var(--text-sm); color: var(--on-navy-soft); text-transform: uppercase; letter-spacing: 0.04em; }
.delivery-group-name { margin: 0; font-size: var(--text-sm); }
.delivery-group + .delivery-group { margin-top: var(--space-3); padding-top: var(--space-3); border-top: 1px dashed var(--navy-line); }
.journey .hint { color: var(--on-navy-soft); }
.journey .notice .hint { color: var(--ink-soft); } /* light notices inside the navy panel */

.journey-empty { display: grid; gap: var(--space-4); }
.journey-empty p { color: var(--on-navy); margin: 0; max-width: 46ch; }
.jd-legend { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); font-size: var(--text-sm); }
.jd-legend li { display: flex; gap: var(--space-2); align-items: flex-start; color: var(--on-navy-soft); }
.jd-legend strong { color: var(--on-navy); }
.jd-legend .icon { color: var(--on-navy); margin-top: 0.1em; }

.journey-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-5); }
.journey .btn { background: transparent; color: var(--on-navy); border-color: var(--navy-line); }
.journey .btn:hover:not(:disabled) { border-color: var(--on-navy); }
.journey .btn-primary { background: var(--teal-on-navy); border-color: var(--teal-on-navy); color: var(--navy); }
.journey .notice { color: var(--ink); }
.journey details.tech pre { background: #0b1530; color: var(--on-navy); }
.journey details.tech { border-top: 1px solid var(--navy-line); padding-top: var(--space-3); margin-top: var(--space-5); }

/* ---------- 6. State treatments ----------
   Every state is shown by an icon and words; colour only reinforces them. */
.is-done    { --state-ink: var(--teal-strong); --state-tint: var(--teal-tint);  --state-on-navy: var(--teal-on-navy); }
.is-active  { --state-ink: var(--teal-strong); --state-tint: var(--teal-tint);  --state-on-navy: var(--teal-on-navy); }
.is-waiting { --state-ink: var(--amber);       --state-tint: var(--amber-tint); --state-on-navy: var(--amber-on-navy); }
.is-failed  { --state-ink: var(--red);         --state-tint: var(--red-tint);   --state-on-navy: var(--red-on-navy); }
.is-idle    { --state-ink: var(--ink-soft);    --state-tint: transparent;       --state-on-navy: var(--grey-on-navy); }
.is-unknown { --state-ink: var(--ink-soft);    --state-tint: var(--surface-sunk); --state-on-navy: var(--on-navy-soft); }

/* ---------- 7. Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}