/* lw-mcp-flow — Day 2 hero animation.
   Four sub-frames: prompt → mTLS handshake → row stream → answer.
   Vanilla CSS, scoped under .lw-mcp-flow. No font imports. */

.lw-mcp-flow {
  --frame-pad: 28px;
  --bubble-radius: 12px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
  width: 100%;
  max-width: 760px;
  margin-inline: auto;
  position: relative;
}

/* ============== Stage ============== */
.lw-mcp-flow__stage {
  position: relative;
  width: 100%;
  height: 360px;
  background: var(--bg-elev-1);
  border: 1px solid var(--line-2);
  border-radius: 14px;
  overflow: hidden;
}

.lw-mcp-flow__frame {
  position: absolute;
  inset: 0;
  padding: var(--frame-pad);
  opacity: 0;
  pointer-events: none;
  transition: opacity 400ms ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lw-mcp-flow__frame.is-active {
  opacity: 1;
  pointer-events: auto;
}
/* The prompt → handshake transition is faster (200ms) — applied via JS class */
.lw-mcp-flow__frame.is-fast { transition: opacity 200ms ease; }

/* ============== Frame ① — Prompt ============== */
.lw-mcp-flow__bubble {
  width: 100%;
  max-width: 540px;
  padding: 16px 18px 14px;
  border-radius: var(--bubble-radius);
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  font-family: var(--font-sans);
}
.lw-mcp-flow__bubble--user { align-self: flex-end; }
.lw-mcp-flow__bubble-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.lw-mcp-flow__avatar {
  width: 22px; height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-elev-3);
  border: 1px solid var(--line-2);
}
.lw-mcp-flow__avatar--ai {
  background: color-mix(in srgb, var(--accent-purple) 18%, var(--bg-elev-3));
  border-color: color-mix(in srgb, var(--accent-purple) 60%, var(--line-2));
  color: var(--accent-purple);
}
.lw-mcp-flow__role {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}
.lw-mcp-flow__bubble-text {
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-heading);
  margin: 0;
  min-height: 1.5em;
}
.lw-mcp-flow__caret {
  display: inline-block;
  width: 7px;
  height: 1.05em;
  background: var(--accent-purple);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: lw-mcp-caret 700ms steps(1) infinite;
}
@keyframes lw-mcp-caret { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* Bold values inside answers get the purple accent */
.lw-mcp-flow__bubble-text strong {
  color: var(--accent-purple);
  font-weight: 600;
}

/* ============== Frame ② — Handshake ============== */
.lw-mcp-flow__handshake {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  width: 100%;
}
.lw-mcp-flow__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100px;
  flex-shrink: 0;
}
.lw-mcp-flow__node-glyph {
  width: 56px; height: 56px;
  border-radius: 12px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  display: grid;
  place-items: center;
  color: var(--text-secondary);
  position: relative;
  transition: border-color 240ms ease, color 240ms ease;
}
.lw-mcp-flow__node-glyph--ai {
  background: color-mix(in srgb, var(--accent-purple) 14%, var(--bg-elev-2));
  border-color: color-mix(in srgb, var(--accent-purple) 50%, var(--line-2));
  color: var(--accent-purple);
}
.lw-mcp-flow__node-glyph svg { width: 26px; height: 26px; }
.lw-mcp-flow__node-glyph[data-secured="1"] {
  border-color: var(--ok);
  color: var(--ok);
}
.lw-mcp-flow__node-check {
  position: absolute;
  bottom: -6px; right: -6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--ok);
  color: var(--bg-primary);
  font-size: 10px;
  display: grid;
  place-items: center;
  opacity: 0;
  transform: scale(0.6);
  transition: opacity 200ms ease, transform 200ms var(--ease-out);
}
.lw-mcp-flow__node-glyph[data-secured="1"] .lw-mcp-flow__node-check {
  opacity: 1; transform: scale(1);
}
.lw-mcp-flow__node-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  text-align: center;
}

.lw-mcp-flow__wire {
  flex: 1;
  height: 2px;
  background: var(--line-2);
  border-radius: 1px;
  position: relative;
  margin: 0 4px;
  max-width: 240px;
  overflow: visible;
}
.lw-mcp-flow__wire-label {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.lw-mcp-flow__pulse {
  position: absolute;
  top: 50%;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-purple);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 12px 0 color-mix(in srgb, var(--accent-purple) 60%, transparent);
  opacity: 0;
}
.is-active .lw-mcp-flow__pulse { animation: lw-mcp-pulse 360ms ease-in-out 3; }
@keyframes lw-mcp-pulse {
  0%   { left: 0%;   opacity: 0; }
  10%  { opacity: 1; }
  50%  { left: 100%; opacity: 1; }
  60%  { background: var(--ok); }
  100% { left: 0%;   opacity: 0; }
}

/* ============== Frame ③ — Row stream ============== */
.lw-mcp-flow__rows {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  max-width: 540px;
  font-family: var(--font-mono);
  font-size: 13px;
}
.lw-mcp-flow__row {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 12px;
  padding: 8px 14px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  border-radius: 6px;
  color: var(--text-body);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 280ms ease, transform 280ms var(--ease-out);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.is-active .lw-mcp-flow__row.is-in {
  opacity: 1;
  transform: translateY(0);
}
.lw-mcp-flow__row-date { color: var(--text-muted); }
.lw-mcp-flow__row-merchant { color: var(--text-body); overflow: hidden; text-overflow: ellipsis; }
.lw-mcp-flow__row-amount { color: var(--text-heading); font-variant-numeric: tabular-nums; }
.lw-mcp-flow__row-amount--in { color: var(--ok); }

/* ============== Frame ④ — Answer ============== */
.lw-mcp-flow__answer { width: 100%; max-width: 540px; }

/* ============== Legend ============== */
.lw-mcp-flow__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.lw-mcp-flow__legend li {
  padding: 8px 10px;
  background: var(--bg-elev-1);
  border: 1px solid var(--line-2);
  border-radius: 6px;
  text-align: center;
  position: relative;
  transition: color 200ms ease, border-color 200ms ease;
}
.lw-mcp-flow__legend li.is-active {
  color: var(--text-heading);
  border-color: var(--line-3);
}
.lw-mcp-flow__legend li.is-active::after {
  content: "";
  position: absolute;
  left: 10px; right: 10px; bottom: -1px;
  height: 1px;
  background: var(--accent-purple);
}

/* ============== Pause button ============== */
.lw-mcp-flow__pause {
  position: absolute;
  top: 12px; right: 12px;
  z-index: 5;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  color: var(--text-secondary);
  font-size: 12px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease;
}
.lw-mcp-flow__pause:hover { color: var(--text-heading); border-color: var(--line-3); }
.lw-mcp-flow__pause:focus-visible { outline: 2px solid var(--accent-purple); outline-offset: 2px; }

/* ============== Responsive ============== */
@media (max-width: 720px) {
  .lw-mcp-flow__stage { height: 460px; }
  .lw-mcp-flow__legend { grid-template-columns: repeat(2, 1fr); }
  .lw-mcp-flow__rows { font-size: 11px; max-width: 100%; }
  .lw-mcp-flow__row { grid-template-columns: 50px 1fr auto; gap: 8px; padding: 6px 10px; }
  .lw-mcp-flow__node { width: 80px; }
  .lw-mcp-flow__wire { max-width: 140px; }
}

/* ============== Reduced motion ============== */
@media (prefers-reduced-motion: reduce) {
  .lw-mcp-flow__caret { animation: none; opacity: 1; }
  .lw-mcp-flow__pulse { animation: none; }
  .lw-mcp-flow__row { transition: none; opacity: 1; transform: none; }
  .lw-mcp-flow__frame { transition: none; }
}