html, body { height: 100%; }

#chat::-webkit-scrollbar { width: 6px; }
#chat::-webkit-scrollbar-track { background: transparent; }
#chat::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
#chat::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

.bubble-user {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.18), rgba(16, 185, 129, 0.10));
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.bubble-assistant {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.bubble-tool {
  background: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.18);
  font-family: ui-monospace, monospace;
}

.dot { animation: bounce 1.4s infinite ease-in-out; }
.dot:nth-child(2) { animation-delay: 0.16s; }
.dot:nth-child(3) { animation-delay: 0.32s; }
@keyframes bounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.25s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.suggestion {
  transition: all 0.15s ease;
}
.suggestion:hover {
  transform: translateY(-1px);
}

textarea {
  field-sizing: content;
}