/* Ask Christopher - layout and components, v2.
 *
 * Transcribed from design_handoff_ask_christopher/ChristopherMathews.dc.html,
 * which expresses every value as an inline style against a CSS variable. The
 * values here are the handoff's values; only the delivery mechanism changed,
 * so the page renders its own layout with no JavaScript.
 *
 * Every colour, radius, shadow and duration is a design-system token. No
 * hard-coded hexes except #fff on the signal button, which the handoff
 * specifies literally.
 *
 * Two structural rules from the handoff are load-bearing rather than
 * decorative, and both are marked where they appear:
 *   - container-type on .centre, because all display type is sized in cqi
 *     against that column rather than the viewport
 *   - flex-shrink: 0 on any child of an overflow-hidden flex column
 */

/* ------------------------------------------------------------------ reset */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--paper-000);
  color: var(--text-primary);
}

/* Every element this page toggles carries a class that sets `display`, and a
 * class beats the [hidden] attribute on specificity - so without this rule
 * `hidden` silently does nothing and the locked ask bar, the rail's question
 * list and the showcase empty state all render at once. Found by rendering
 * the page, not by reading it. */
[hidden] { display: none !important; }

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

/* ----------------------------------------------------------------- motion */

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}
@keyframes pulse {
  0%, 100% { opacity: .25; }
  50%      { opacity: 1; }
}

.rise { animation: rise 190ms cubic-bezier(.16, 1, .3, 1) both; }

/* Scrollbars, kept quiet. WebKit only; other engines get their default. */
.scrolls::-webkit-scrollbar { width: 8px; }
.scrolls::-webkit-scrollbar-thumb { background: var(--border-default); }

/* ------------------------------------------------------------------ shell */

.shell {
  display: grid;
  grid-template-columns: clamp(180px, 18vw, 264px) minmax(0, 1fr) clamp(236px, 24vw, 348px);
  height: 100vh;
  height: 100dvh;   /* dvh second, so old engines keep the vh value */
  overflow: hidden;
  background: var(--paper-000);
}

/* ------------------------------------------------------- left column: rail */

.rail {
  border-right: var(--border-width-hairline) solid var(--border-hairline);
  background: var(--paper-050);
  padding: 22px 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow: auto;
}

.wordmark { text-decoration: none; color: inherit; display: block; }
.wordmark:hover { text-decoration: none; }

.wordmark__name {
  display: block;
  font-family: var(--font-display);
  font-weight: var(--weight-black);
  text-transform: uppercase;
  font-size: 18px;
  letter-spacing: -.02em;
  line-height: 1.02;
  color: var(--text-primary);
}

.wordmark__sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--tracking-mono-label);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 7px;
}

.rail__block { display: flex; flex-direction: column; gap: 9px; }

.rail__empty {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-muted);
  border-left: var(--border-width-hairline) solid var(--border-hairline);
  padding-left: 10px;
}

.rail__foot { margin-top: auto; }

.rail__note {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-muted);
  border-top: var(--border-width-hairline) solid var(--border-hairline);
  padding-top: 12px;
}

/* Session list. Rows are the navigation: one per answered question, plus the
 * one in flight. The handoff nests opened pieces beneath their question; that
 * nesting arrives with the artifact view, not in this batch. */

.sessionlist { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }

.sessionlist__row {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  border-left: var(--border-width-strong) solid var(--border-hairline);
  border-radius: 0;
  padding: 0 0 0 10px;
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.35;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-ui);
}
.sessionlist__row:hover { color: var(--text-primary); }
.sessionlist__row--current { border-left-color: var(--signal-500); color: var(--text-primary); }
.sessionlist__row--pending { color: var(--text-muted); border-left-color: var(--signal-500); }

.raillist { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }

.raillist__row {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  border-bottom: var(--border-width-hairline) solid var(--border-default);
  border-radius: 0;
  padding: 0 0 7px;
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.35;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-ui);
}
.raillist__row:hover { color: var(--text-link); border-bottom-color: var(--border-signal); }

/* ---------------------------------------------------------------- buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-mono-label);
  text-transform: uppercase;
  cursor: pointer;
  transition: background 130ms cubic-bezier(.2, 0, 0, 1), color 130ms cubic-bezier(.2, 0, 0, 1);
}
.btn:active { transform: translateY(1px); }
.btn--full { width: 100%; }
.btn__icon { flex-shrink: 0; }

.btn--outline {
  background: transparent;
  border: var(--border-width-hairline) solid var(--border-default);
  color: var(--text-primary);
}
.btn--outline:hover { background: var(--paper-100); }

/* ------------------------------------------------------- centre column ---- */

.centre {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--paper-000);
  min-width: 0;
  /* LOAD-BEARING. Every cqi length below resolves against this column, which
   * is why display type tracks the column and not the viewport. Removing this
   * silently reverts the whole type scale to its clamp minimum. */
  container-type: inline-size;
}

.centre__scroll { flex: 1; overflow: auto; }

/* ------------------------------------------------------------ view: arrival */

.arrival {
  padding: clamp(28px, 4vw, 64px) clamp(24px, 4vw, 64px) 24px;
  max-width: 780px;
}

.metalabel {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--tracking-mono-label);
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0;
}

/* The MetaLabel device: optional number, label, then a hairline taking the
 * remaining width. The most-used element in the design. */
.metalabel--ruled { display: flex; align-items: center; gap: 10px; }
.metalabel--ruled::after {
  content: "";
  flex: 1;
  height: var(--border-width-hairline);
  background: var(--border-hairline);
}
.metalabel__n { color: var(--text-primary); }
.metalabel--signal .metalabel__t,
.metalabel--signal .metalabel__n { color: var(--text-signal); }

.provocation {
  font-family: var(--font-display);
  font-weight: var(--weight-black);
  text-transform: uppercase;
  font-size: clamp(34px, 9.8cqi, 76px);
  line-height: .9;
  letter-spacing: -.035em;
  overflow-wrap: break-word;
  margin: 18px 0 0 -4px;   /* optical hang */
}
.provocation__signal { color: var(--signal-500); }

.standfirst {
  font-family: var(--font-body);
  font-size: 20px;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 54ch;
  margin: 26px 0 30px;
}

.suggested { display: flex; flex-direction: column; gap: 8px; max-width: 620px; }

.suggested__item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  text-align: left;
  cursor: pointer;
  background: var(--paper-050);
  border: var(--border-width-hairline) solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  font-family: var(--font-ui);
  font-size: 15px;
  color: var(--text-primary);
  transition: background 130ms cubic-bezier(.2, 0, 0, 1);
}
.suggested__item:hover { background: var(--paper-100); }

.suggested__kind {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--tracking-mono-label);
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

.arrival__foot {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 40px;
  margin-top: 44px;
  padding-top: 28px;
  border-top: var(--border-width-hairline) solid var(--border-hairline);
  align-items: start;
}

.arrival__facts {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-muted);
  line-height: 1.9;
  margin: 0;
}

.annotation {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-secondary);
}
.annotation__marker {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--text-signal);
  margin-bottom: 7px;
}

/* ------------------------------------------------------------- view: thread */

.thread { padding: 40px clamp(24px, 4vw, 64px) 8px; max-width: 780px; }
.thread:empty { display: none; }

.turn { margin-bottom: 44px; }
.turn:last-child { margin-bottom: 16px; }

/* Question restated, with the mono index. */
.turn__ask {
  display: flex;
  gap: 14px;
  align-items: baseline;
  border-left: var(--border-width-rule) solid var(--ink-900);
  padding-left: 16px;
  margin-bottom: 22px;
}
.turn__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--tracking-mono-label);
  text-transform: uppercase;
  color: var(--text-muted);
  padding-top: 5px;
  white-space: nowrap;
}
.turn__q {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  font-size: clamp(19px, 3.5cqi, 27px);
  letter-spacing: -.025em;
  line-height: 1.08;
  overflow-wrap: break-word;
  margin: 0;
}

/* In flight: the rule turns signal and the heading goes muted, so a pending
 * question is visibly a question rather than an answer. */
.turn--pending .turn__ask { border-left-color: var(--signal-500); }
.turn--pending .turn__q { color: var(--text-muted); }

/* A failed attempt is shown but is not a turn: it takes no turn number, no
 * session row, and the next question removes it. The muted rule says so
 * visually - this block is not part of the conversation's record. */
.turn--failed .turn__ask { border-left-color: var(--border-default); }
.turn--failed .turn__q { color: var(--text-muted); }

.turn__body { font-family: var(--font-body); font-size: 19px; line-height: 1.6; color: var(--text-primary); }
.turn__body p { margin: 0 0 18px; max-width: 62ch; }
.turn__body > :last-child { margin-bottom: 0; }

/* Rendered Markdown subset. Nothing here changes the model's words - only the
 * rhythm they are read at. Paragraph spacing went 16 -> 18px so a long answer
 * has somewhere for the eye to rest; measure and size are unchanged. No drop
 * caps, no rules between paragraphs, no emphasis on the opening line: those
 * move where attention lands, which is close enough to editing the answer. */

/* Newsreader is loaded 300-700 with a real italic axis, so both of these are
 * genuine faces rather than synthesised by the browser. */
.turn__body strong { font-weight: var(--weight-semibold); }
.turn__body em { font-style: italic; }

.turn__body ul,
.turn__body ol {
  margin: 0 0 18px;
  padding-left: 1.15em;
  max-width: 62ch;
}
.turn__body li { line-height: 1.55; }
.turn__body li + li { margin-top: 8px; }
.turn__body li::marker { color: var(--text-muted); }

/* A list directly under its lead-in sentence reads as one thought, so the gap
 * above it is tighter than the gap between paragraphs. */
.turn__body p + ul,
.turn__body p + ol { margin-top: -6px; }

/* Links inherit the design system's signal colour and underline from base.css.
 * Only the wrap behaviour is added, because a long URL as link text would
 * otherwise push past the measure. */
.turn__body a { overflow-wrap: anywhere; }

/* ------------------------------------------------------------ loading state
 *
 * The handoff tuned this for a 950ms prototype delay. Real latency is
 * multi-second and unstreamed - Passenger buffers text/event-stream on shared
 * hosting - so three pulsing dots alone would read as a hang. The label
 * advances through named stages and starts reporting elapsed seconds once the
 * wait is long enough to need evidence of progress. app.js drives the text;
 * the dots are only a liveness cue. */

.wait {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-mono-label);
  text-transform: uppercase;
  color: var(--text-muted);
  min-height: 16px;
}
.wait__dot { animation: pulse 900ms linear infinite; }
.wait__dot:nth-of-type(2) { animation-delay: 150ms; }
.wait__dot:nth-of-type(3) { animation-delay: 300ms; }

.skeleton { display: grid; gap: 10px; margin-top: 20px; max-width: 62ch; }
.skeleton span { height: 13px; background: var(--paper-100); border-radius: var(--radius-sm); display: block; }
.skeleton span:nth-child(2) { width: 92%; }
.skeleton span:nth-child(3) { width: 64%; }

/* -------------------------------------------------------------- callouts */

.callout {
  border: var(--border-width-hairline) solid var(--border-default);
  border-left: var(--border-width-rule) solid var(--status-danger);
  border-radius: var(--radius-sm);
  background: var(--paper-050);
  padding: 18px 20px;
  max-width: 640px;
}
.callout__title {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  font-size: 17px;
  letter-spacing: -.02em;
  line-height: 1.15;
  margin: 0 0 8px;
}
.callout__body { font-family: var(--font-body); font-size: 17px; line-height: 1.55; color: var(--text-secondary); margin: 0; }
.callout__actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }

/* The daily-cap panel. Deliberately carries no count: the gate is a ceiling
 * for the whole site per UTC day, so "20 of 20" would be wrong twice. */
.limit {
  border: var(--border-width-hairline) solid var(--border-default);
  border-top: var(--border-width-rule) solid var(--signal-500);
  border-radius: var(--radius-sm);
  padding: 24px;
  max-width: 640px;
}
.limit__title {
  font-family: var(--font-display);
  font-weight: var(--weight-black);
  text-transform: uppercase;
  font-size: clamp(21px, 3.9cqi, 30px);
  letter-spacing: -.03em;
  line-height: 1.05;
  margin: 12px 0;
}
.limit__body { font-family: var(--font-body); font-size: 17px; line-height: 1.6; color: var(--text-secondary); margin: 0; max-width: 52ch; }

/* -------------------------------------------------------------- ask bar --
 * Sibling of the scroll region, so it never scrolls away. */

.askbar {
  border-top: var(--border-width-hairline) solid var(--border-hairline);
  padding: 14px clamp(24px, 4vw, 64px) 20px;
  background: var(--paper-000);
  flex-shrink: 0;
}

.askbar__inner { max-width: 780px; }

.askform {
  display: flex;
  border: var(--border-width-strong) solid var(--ink-900);
  border-radius: var(--radius-sm);
  background: var(--paper-000);
}
.askform:focus-within { box-shadow: var(--shadow-focus); }

.askform__input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  padding: 15px 16px;
  font-family: var(--font-ui);
  font-size: 16px;
  color: var(--text-primary);
}
.askform__input::placeholder { color: var(--text-muted); }
.askform__input:disabled { color: var(--text-muted); }

.askform__send {
  flex-shrink: 0;
  border: none;
  background: var(--signal-500);
  color: #fff;
  padding: 0 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-mono-label);
  text-transform: uppercase;
  transition: background 130ms cubic-bezier(.2, 0, 0, 1);
}
.askform__send:hover:not(:disabled) { background: var(--signal-600); }
.askform__send:disabled { opacity: .45; cursor: not-allowed; }

.askbar__hint {
  margin: 9px 0 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.askbar__hint--warn { color: var(--status-warning); }

.askbar__locked {
  max-width: 780px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  border: var(--border-width-hairline) solid var(--border-default);
  border-left: var(--border-width-rule) solid var(--signal-500);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  background: var(--paper-050);
}
.askbar__lockedtext { font-family: var(--font-ui); font-size: 14px; color: var(--text-secondary); }

/* ------------------------------------------------- right column: showcase */

.showcase {
  border-left: var(--border-width-hairline) solid var(--border-hairline);
  background: var(--paper-050);
  padding: 22px 20px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.showcase__head { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; flex-shrink: 0; }
.showcase__head .metalabel--ruled { flex: 1; }

.showcase__count {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

.showcase__sub {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-muted);
  margin: -8px 0 0;
  flex-shrink: 0;
}

.showcase__cards { display: flex; flex-direction: column; gap: 16px; }
.showcase__cards:empty { display: none; }

/* The empty state. An invitation and a one-line "what is in here" - never
 * statistics, per the handoff's explicit correction.
 *
 * Not pinned to the bottom with margin-top:auto. The handoff pins the rail's
 * *footer note*, which sits below a column of cards; pinning the empty state
 * instead leaves a tall gap that reads as a failed load rather than an empty
 * rail. It sits under the sub-line, where a first card would go. */
.showcase__idle {
  border-top: var(--border-width-hairline) solid var(--border-hairline);
  padding-top: 14px;
  flex-shrink: 0;
}
.showcase__idle p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-muted);
}
.showcase__idle p + p { margin-top: 10px; }

/* Card styling for the rail.
 *
 * The handoff's card leads with a media frame. Neither record has imagery, and
 * two grey drop targets would trade one unfinished signal for another - so the
 * media area is absent rather than empty, and the card is type only. The frame,
 * its aspect ratio and the project numeral come back as a data change when
 * screenshots exist; they are deliberately not carried here as dead rules.
 *
 * It is an <a> to a real repository, so the browser supplies middle-click,
 * open-in-new-tab and a status-bar preview for free.
 *
 * FLEX-SHRINK IS LOAD-BEARING: without it the rail's flex column crushes cards
 * to a few pixels. The handoff reports this as an observed bug. */
.showcard {
  text-align: left;
  cursor: pointer;
  background: var(--paper-000);
  border: var(--border-width-hairline) solid var(--border-default);
  border-top: var(--border-width-rule) solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0;
  display: block;
  width: 100%;
  overflow: hidden;
  flex-shrink: 0;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 130ms cubic-bezier(.2, 0, 0, 1), transform 130ms cubic-bezier(.2, 0, 0, 1),
              border-color 130ms cubic-bezier(.2, 0, 0, 1);
}
.showcard:hover {
  box-shadow: var(--shadow-lift);
  transform: translateY(-2px);
  text-decoration: none;
  color: inherit;
}

/* Promoted because the visitor's question or the answer named it. The signal
 * rule is the same device the design uses for the current turn - it marks
 * relevance, and claims nothing about the answer having cited it. */
.showcard--live { border-color: var(--signal-500); }

.showcard__body { display: block; padding: 13px; }
.showcard__meta { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.showcard__cat { font-family: var(--font-mono); font-size: 10px; letter-spacing: var(--tracking-mono-label); text-transform: uppercase; color: var(--text-signal); }
.showcard__ref { font-family: var(--font-mono); font-size: 9px; letter-spacing: .06em; text-transform: uppercase; color: var(--text-muted); }
.showcard__title {
  display: block;
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  font-size: 15px;
  letter-spacing: -.02em;
  line-height: 1.15;
  color: var(--text-primary);
  margin-top: 8px;
}
.showcard__blurb { display: block; font-family: var(--font-body); font-size: 14px; line-height: 1.5; color: var(--text-secondary); margin-top: 6px; }
.showcard__foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  border-top: var(--border-width-hairline) solid var(--border-hairline);
  margin-top: 10px;
  padding-top: 8px;
}
.showcard__result { font-family: var(--font-mono); font-size: 10px; letter-spacing: .07em; text-transform: uppercase; color: var(--text-signal); }
.showcard__open { font-family: var(--font-mono); font-size: 9px; letter-spacing: .07em; text-transform: uppercase; color: var(--text-muted); }

/* =========================================================================
   Responsive
   =========================================================================
   Desktop is the designed target and the only state the handoff approves.
   Below 900px it declares mobile undesigned and out of scope - but the site
   is live and the frontend it replaces collapsed to one column at 860px, so
   shipping a desktop-only shell would be a regression on real traffic.
   What follows keeps the page usable below 900px without inventing the
   mobile design: same content, same order, no new components, no drawer and
   no accordion. Get mobile signed off before building those.            */

/* 900-1080px: still three columns. The clamps narrow the rails and the cqi
   type follows the centre column, exactly as the handoff describes. No rule
   needed - it is recorded here so the absence reads as deliberate. */

@media (max-width: 900px) {
  /* Out of the viewport-height grid and into normal document flow, so the
     three columns stack and the page scrolls as one. */
  .shell {
    grid-template-columns: minmax(0, 1fr);
    height: auto;
    min-height: 100vh;
    min-height: 100dvh;
    overflow: visible;
  }

  .rail {
    border-right: none;
    border-bottom: var(--border-width-hairline) solid var(--border-hairline);
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px 20px;
    padding: 16px 20px;
    overflow: visible;
  }
  .wordmark { flex: 1 1 auto; }
  .btn--full { width: auto; }
  .rail__foot { margin-top: 0; flex: 1 1 100%; }
  .rail__note { border-top: none; padding-top: 0; }

  /* Stacked, a long session list would push the provocation below the fold.
     Bounding its height keeps it usable and keeps the hero visible. Capped
     rather than collapsed on purpose: a drawer is the handoff's unapproved
     mobile design, and a details element is a component nobody signed off. */
  .rail__block { flex: 1 1 100%; }
  .sessionlist, .raillist { max-height: 132px; overflow: auto; }

  .centre { overflow: visible; }
  .centre__scroll { overflow: visible; flex: none; }

  /* Docked rather than pinned to the column: the ask bar stays reachable
     while the page scrolls, which is the one behaviour the handoff's mobile
     notes call non-negotiable. */
  .askbar {
    position: sticky;
    bottom: 0;
    z-index: 2;
    box-shadow: 0 -8px 20px -18px rgba(20, 19, 16, .42);
  }

  .showcase {
    border-left: none;
    border-top: var(--border-width-hairline) solid var(--border-hairline);
    overflow: visible;
  }
  .showcase__idle { margin-top: 0; }

  /* 48px minimum hit targets, from the handoff's mobile rules. */
  .btn, .askform__send, .suggested__item { min-height: 48px; }
  .sessionlist__row, .raillist__row { min-height: 44px; display: flex; align-items: center; }
}

@media (max-width: 620px) {
  .arrival { padding: 24px 20px 20px; }
  .thread  { padding: 28px 20px 8px; }
  .askbar  { padding: 12px 20px 16px; }
  .standfirst { font-size: 18px; }
  .turn__body { font-size: 18px; }
  .turn__body p { max-width: none; }
  /* One column of margin left, so the annotation stops being marginalia and
     becomes a note. Dropping it entirely loses real brand voice. */
  .arrival__foot { gap: 24px; margin-top: 32px; }
  .askform { flex-wrap: wrap; }
  .askform__input { flex: 1 1 100%; }
  .askform__send { flex: 1 1 100%; justify-content: center; padding: 14px 20px; }
}

/* ------------------------------------------------------- reduced motion --
 * Zeroes every animation, per the handoff. The wait label still advances,
 * because it is text rather than animation - which is the point: progress
 * stays legible without movement. */

@media (prefers-reduced-motion: reduce) {
  .rise, .wait__dot { animation: none; }
  .showcard, .btn, .suggested__item, .askform__send { transition: none; }
  .showcard:hover { transform: none; }
  .btn:active { transform: none; }
}