/* =========================================================================
   MARGIN BRIDGE DEMO (#marginBridgeDemo).
   See src/components/MarginBridgeDemo.astro for the storyboard.
   Timeline: public/js/margin-bridge-demo.js toggles `is-*` classes.

   A single steady scene, no crossfade: a chat panel beside a gross-margin
   bridge, both visible at once — same chat/composer visual language as
   BudgetDetailDemo (bubble message, plain-text AI reply, paperclip/mode/
   send composer bar), laid out side-by-side like BudgetTableChatDemo.
   Same --xxx-canvas/card/border/accent palette (product likeness) as
   every other demo on the site.
   ========================================================================= */

.mbd {
  --mbd-canvas: #FAF9F5;
  --mbd-card: #FFFFFF;
  --mbd-border: #DBDBDE;
  --mbd-line: #EAEAEA;
  --mbd-head: #F6F6F7;
  --mbd-ink: #2B2B2B;
  --mbd-ink2: #777777;
  --mbd-accent: #6A5BC6;
  --mbd-accent-soft: #ECECFF;
  --mbd-neutral: #706F6A;
  --mbd-neutral-soft: #E6E5E0;
}

/* standard product-demo dimensions (width:100% keeps aspect-ratio from
   computing width off the min-height floor in a narrow container). */
.mbd__stage {
  position: relative; overflow: hidden; width: 100%;
  aspect-ratio: 3 / 2; min-height: 380px; max-width: 640px; margin: 0 auto;
  background: var(--mbd-canvas);
  display: flex; flex-direction: column;
  transition: opacity .5s ease;
}
.mbd.is-out .mbd__stage { opacity: 0; }

.mbd__topBar {
  flex: none; font-size: 11px; font-weight: 600; color: var(--mbd-ink);
  padding: 12px 14px 9px; border-bottom: 1px solid var(--mbd-line);
  white-space: nowrap;
}

.mbd__layout { position: relative; flex: 1; min-height: 0; display: flex; }

/* ---------- chat pane — left, narrower, same visual language as
   BudgetDetailDemo's chat (bubble message, plain-text reply, composer). ---------- */
.mbd__chatPane {
  position: relative; width: 40%; flex: none; min-width: 0;
  display: flex; flex-direction: column;
  background: var(--mbd-card); border-right: 1px solid var(--mbd-border);
  padding: 14px 0 10px;
}
.mbd__chatThread {
  flex: 1; min-height: 0; padding: 0 12px; display: flex; flex-direction: column;
  justify-content: flex-start; gap: 8px; overflow: hidden;
}
.mbdMsg {
  margin: 0; background: var(--mbd-head); border: 1px solid var(--mbd-line); border-radius: 8px;
  padding: 8px 9px; font-size: 9.5px; line-height: 1.4; color: var(--mbd-ink);
  opacity: 0; transform: translateY(6px);
  transition: opacity .35s ease, transform .35s ease;
}
.mbd.is-sent .mbdMsg { opacity: 1; transform: none; }

/* AI's reply — plain text (not a bubble), same voice as BudgetDetailDemo's
   .bdd__aiReply. Cited figures light up in sync with the bridge bars. */
.mbd__aiReply {
  margin: 0; font-size: 9px; line-height: 1.5; color: var(--mbd-ink);
  opacity: 0; transform: translateY(4px);
  transition: opacity .3s ease, transform .3s ease;
}
.mbd.is-replied .mbd__aiReply { opacity: 1; transform: none; }
.mbd__cite {
  font-weight: 600; color: var(--mbd-ink2); border-radius: 3px;
  transition: background .3s ease, color .3s ease;
}
.mbd__cite.is-cited { background: var(--mbd-accent-soft); color: var(--mbd-accent); }

.mbd__greeting {
  position: absolute; left: 12px; right: 12px; top: 34%; transform: translateY(-50%);
  margin: 0; text-align: center; font-size: 11px; font-weight: 500; color: var(--mbd-ink2);
  transition: opacity .3s ease;
}
.mbd.is-typing .mbd__greeting, .mbd.is-sent .mbd__greeting { opacity: 0; }

.mbdComposer {
  position: absolute; left: 12px; right: 12px; top: 66%; transform: translateY(-50%);
  background: var(--mbd-canvas);
  border: 1px solid var(--mbd-border); border-radius: 8px; padding: 8px 8px 6px;
  transition: top .8s cubic-bezier(.6, .05, .3, 1), border-color .3s ease, box-shadow .3s ease;
}
.mbd.is-sent .mbdComposer { top: 82%; }
.mbd.is-typing .mbdComposer {
  border-color: var(--mbd-accent); box-shadow: 0 0 0 2px var(--mbd-accent-soft);
}
.mbdComposer__field { position: relative; min-height: 22px; font-size: 9.5px; line-height: 1.4; color: var(--mbd-ink); }
.mbdComposer__ph { position: absolute; inset: 0; color: #9b9ba2; transition: opacity .2s ease; }
.mbd.is-typing .mbdComposer__ph { opacity: 0; }
.mbdCaret {
  display: none; width: 1.5px; height: 10px; margin-left: 1px; vertical-align: -2px;
  background: var(--mbd-ink);
}
.mbd.is-typing .mbdCaret { display: inline-block; animation: mbdCaret 1s step-end infinite; }
@keyframes mbdCaret { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.mbdComposer__bar {
  display: flex; align-items: center; gap: 6px;
  border-top: 1px solid var(--mbd-line); margin: 5px -8px 0; padding: 5px 8px 0;
}
.mbdComposer__clip { color: var(--mbd-ink2); flex: none; }
.mbdComposer__mode {
  margin-left: auto; display: inline-flex; align-items: center; gap: 3px;
  font-size: 8px; font-weight: 500; color: #fff;
  background: var(--mbd-ink2); border-radius: 999px; padding: 3px 8px;
  white-space: nowrap;
}
.mbdComposer__mode i { font-style: normal; font-size: 6.5px; }
.mbdComposer__send {
  width: 18px; height: 18px; border-radius: 50%; flex: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; color: var(--mbd-ink); background: #D9D9D9;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.mbd.is-press-send .mbdComposer__send { transform: scale(.82); background: var(--mbd-ink); color: #fff; }

/* ---------- model pane — the gross-margin bridge ---------- */
.mbd__modelPane { flex: 1; min-width: 0; padding: 12px 12px 14px; display: flex; flex-direction: column; }
.mbdHead { margin: 0 0 8px; font-size: 10.5px; font-weight: 600; color: var(--mbd-ink); }

.mbdBridge { display: flex; flex-direction: column; gap: 6px; flex: 1; justify-content: center; }
.mbdBarRow { display: grid; grid-template-columns: 78px 1fr 44px; align-items: center; gap: 6px; }
.mbdBarRow__label {
  font-size: 8.5px; color: var(--mbd-ink); font-weight: 500;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.mbdBarRow__track { position: relative; height: 7px; background: var(--mbd-head); border-radius: 3px; overflow: hidden; }
.mbdBarRow__bar {
  position: absolute; top: 0; bottom: 0; left: 0; width: var(--w); border-radius: 3px;
  background: var(--mbd-ink2);
}
.mbdBarRow--anchor .mbdBarRow__bar { background: var(--mbd-ink); }
.mbdBarRow--anchor .mbdBarRow__label, .mbdBarRow--anchor .mbdBarRow__val { font-weight: 700; color: var(--mbd-ink); }
.mbdBarRow--up .mbdBarRow__bar { background: var(--mbd-accent); }
.mbdBarRow--down .mbdBarRow__bar { background: var(--mbd-neutral); }
.mbdBarRow__val { font-size: 8.5px; font-variant-numeric: tabular-nums; text-align: right; color: var(--mbd-ink2); flex: none; }

/* a bar lights up the moment the chat cites it. */
.mbdBarRow.is-lit .mbdBarRow__track { outline: 1.5px solid var(--mbd-accent); outline-offset: 1px; border-radius: 4px; }
.mbdBarRow.is-lit .mbdBarRow__label, .mbdBarRow.is-lit .mbdBarRow__val { color: var(--mbd-accent); }

/* ---------- responsive — stack the two panes below the point the row
   gets too cramped (matches the other demos' single mobile breakpoint). ---------- */
@media (max-width: 460px) {
  .mbd__stage { aspect-ratio: auto; min-height: 620px; }
  .mbd__layout { flex-direction: column; }
  .mbd__chatPane { width: 100%; border-right: none; border-bottom: 1px solid var(--mbd-border); min-height: 240px; }
}