/* ── Chat/Messages Layout Styles ── */
.chat-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: calc(100vh - var(--topnav-height) - var(--space-6) - var(--space-16));
  gap: var(--space-4);
}
.chat-list-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}
.chat-window-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}
.chat-list-items {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.chat-feed {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  background: var(--surface-page);
}
.chat-bubble {
  max-width: 70%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  position: relative;
  animation: chat-bubble-pop 200ms var(--ease-spring);
}
@keyframes chat-bubble-pop {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.chat-bubble-received {
  background: var(--surface-card);
  color: var(--text-primary);
  align-self: flex-start;
  border-bottom-left-radius: var(--radius-xs);
  border: 1px solid var(--border-default);
}
.chat-bubble-sent {
  background: var(--gradient-primary);
  color: white;
  align-self: flex-end;
  border-bottom-right-radius: var(--radius-xs);
}
.chat-input-area {
  padding: var(--space-4);
  background: var(--surface-card);
  border-top: 1px solid var(--border-default);
  display: flex;
  gap: var(--space-3);
  align-items: center;
}
.chat-active-item {
  background: var(--surface-hover);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}
@media (max-width: 768px) {
  .chat-layout {
    grid-template-columns: 1fr;
  }
  .chat-list-card {
    display: none;
  }
}