.chat-wrap {
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  gap: 0;
  min-height: calc(100vh - 0px);
  max-width: 1200px;
  margin: 0 auto;
}
@media (max-width: 800px) {
  .chat-wrap { grid-template-columns: 1fr; }
}

.think-pane {
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 14px;
  font-size: 13px;
  color: var(--muted);
  overflow-y: auto;
}
.think-pane h3 { margin-top: 0; font-size: 14px; color: var(--text); }
.think-step { margin-bottom: 10px; padding: 8px; border-radius: 8px; background: #121822; }
.think-step strong { display: block; color: var(--accent); margin-bottom: 4px; }

.chat-main { display: flex; flex-direction: column; padding: 16px 20px 24px; }
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.bubble {
  max-width: 92%;
  padding: 12px 14px;
  border-radius: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
}
.bubble.user { align-self: flex-end; background: #1e3550; border: 1px solid var(--border); }
.bubble.ai { align-self: flex-start; background: var(--panel); border: 1px solid var(--border); }

.composer {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
.composer textarea {
  flex: 1;
  min-height: 56px;
  resize: vertical;
  max-width: none;
}

.toolbar .btn { margin-right: 6px; margin-top: 0; font-size: 13px; }
.progress-bar {
  height: 6px; background: #121822; border-radius: 4px; overflow: hidden;
  margin-top: 8px;
}
.progress-bar span {
  display: block;
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.2s;
}