/* Chat panel — per-track source-grounded chat. Self-contained, no host-page
   dependency beyond .chat-btn triggers and a #chat-panel-root mount point. */

:root { --cp-width: min(90vw, 680px); }

#chat-panel-root {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--cp-width);
  height: 100vh;
  background: #fbfaf7;
  color: #1a1c20;
  box-shadow: -4px 0 18px rgba(0, 0, 0, 0.18);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.28s ease;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  border-left: 1px solid #e3e1da;
}
#chat-panel-root.open { transform: translateX(0); }

body.chat-open {
  margin-right: var(--cp-width);
  transition: margin-right 0.28s ease;
}

@media (max-width: 1500px) {
  body.chat-open .shell { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 700px) {
  body.chat-open { margin-right: 0; }
}

.cp-header {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid #e3e1da;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: #f4f2ec;
}
.cp-header h2 { margin: 0; font-size: 1.02rem; }
.cp-header p { margin: 0.15rem 0 0; font-size: 0.82rem; color: #5a5e66; }
.cp-close {
  border: none; background: transparent; font-size: 1.4rem; line-height: 1;
  cursor: pointer; color: #5a5e66; padding: 0.2rem 0.4rem;
}
.cp-close:hover { color: #1a1c20; }

.cp-body { flex: 1; overflow-y: auto; padding: 1rem; }

.cp-empty { color: #5a5e66; font-size: 0.9rem; padding: 0.5rem 0.2rem; }
.cp-empty .ex { margin: 0.6rem 0 0; padding-left: 1.1rem; }
.cp-empty .ex li { margin: 0.3rem 0; }

.cp-msg { margin: 0 0 1rem; }
.cp-msg.user .cp-bubble { background: #e7ebf3; margin-left: 2rem; }
.cp-msg.assistant .cp-bubble { background: #f4f2ec; margin-right: 0.25rem; }
.cp-bubble { border-radius: 10px; padding: 0.65rem 0.85rem; font-size: 0.94rem; }
.cp-bubble p { margin: 0.4rem 0; }
.cp-bubble p:first-child { margin-top: 0; }
.cp-bubble p:last-child { margin-bottom: 0; }
.cp-bubble ul { margin: 0.4rem 0; padding-left: 1.2rem; }
.cp-bubble strong { font-weight: 600; }

.cp-table-wrap { overflow-x: auto; margin: 0.5rem 0; }
.cp-table-wrap table { border-collapse: collapse; width: 100%; font-size: 0.8rem; }
.cp-table-wrap th, .cp-table-wrap td {
  border: 1px solid #e3e1da; padding: 0.35rem 0.5rem; text-align: left; vertical-align: top;
}
.cp-table-wrap th { background: #f4f2ec; font-weight: 600; }

.cp-chip {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 1.15rem; height: 1.15rem; padding: 0 0.3rem;
  background: #2e4a86; color: #fff; border-radius: 4px;
  font-size: 0.72rem; font-weight: 600; cursor: pointer;
  vertical-align: super; margin: 0 0.05rem; border: none;
}
.cp-chip:hover { background: #1f3a6b; }

.cp-source-card {
  border: 1px solid #d9d6cc; background: #fff; border-radius: 8px;
  padding: 0.7rem 0.85rem; margin: 0.5rem 0 1rem; font-size: 0.88rem;
}
.cp-source-card .who { font-weight: 600; }
.cp-source-card .aff { color: #5a5e66; font-weight: 400; }
.cp-source-card blockquote {
  margin: 0.5rem 0; padding-left: 0.7rem; border-left: 3px solid #b27406;
  color: #333; font-style: italic;
}
.cp-source-card a { color: #2e4a86; font-size: 0.85rem; }

.cp-typing { color: #8a8e96; font-size: 0.85rem; font-style: italic; }

.cp-gate { padding: 1rem; border-top: 1px solid #e3e1da; background: #f4f2ec; }
.cp-gate p { margin: 0 0 0.5rem; font-size: 0.88rem; color: #333; }
.cp-gate-row { display: flex; gap: 0.5rem; }
.cp-gate-row input {
  flex: 1; padding: 0.5rem 0.6rem; border: 1px solid #cfccc2; border-radius: 6px; font-size: 0.92rem;
}
.cp-gate-row button, .cp-input-row button {
  background: #2e4a86; color: #fff; border: none; border-radius: 6px;
  padding: 0.5rem 0.9rem; font-size: 0.9rem; cursor: pointer;
}
.cp-gate-row button:hover, .cp-input-row button:hover { background: #1f3a6b; }
.cp-gate-error { color: #a4351d; font-size: 0.82rem; margin-top: 0.4rem; }

.cp-input-area { border-top: 1px solid #e3e1da; padding: 0.8rem; background: #fbfaf7; }
.cp-input-row { display: flex; gap: 0.5rem; align-items: flex-end; }
.cp-input-row textarea {
  flex: 1; padding: 0.55rem 0.7rem; border: 1px solid #cfccc2; border-radius: 6px;
  font-size: 0.94rem; font: inherit; line-height: 1.4; resize: none;
  max-height: 160px; overflow-y: auto;
}
.cp-input-row button:disabled { background: #b9bcc2; cursor: not-allowed; }
.cp-hint { font-size: 0.76rem; color: #8a8e96; margin: 0.4rem 0 0; }
.cp-error-banner {
  background: #fbe4de; color: #7a2415; border-radius: 6px; padding: 0.5rem 0.7rem;
  font-size: 0.85rem; margin-bottom: 0.6rem;
}

/* Trigger buttons (index track row + readout toolbar) */
.chat-btn {
  background: #2e4a86; color: #fff; border: none; border-radius: 6px;
  padding: 0.35rem 0.7rem; font-size: 0.85rem; cursor: pointer; white-space: nowrap;
}
.chat-btn:hover { background: #1f3a6b; }

@media (max-width: 640px) {
  #chat-panel-root { width: 100vw; border-left: none; }
}