*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  margin: 0;
  background: #f1f5f9;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.chat-container {
  width: 100%;
  max-width: 400px;
  background: #ffffff;
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.message-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  width: 100%;
}

.user-row {
  justify-content: flex-end;
}

.ai-row {
  justify-content: flex-start;
}

.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: #ffffff;
  flex-shrink: 0;
}

.ai-avatar {
  background: linear-gradient(135deg, #8b5cf6, #3b82f6);
}

.bubble {
  max-width: 75%;
  padding: 12px 16px;
  font-size: 0.95rem;
  line-height: 1.5;
  border-radius: 18px;
}

.user-bubble {
  background: #3b82f6;
  color: #ffffff;
  border-bottom-right-radius: 4px;
}

.ai-bubble {
  background: #f1f5f9;
  color: #1e293b;
  border-bottom-left-radius: 4px;
}

/* Typing Indicator Animation */
.typing-bubble {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 16px 20px;
}

.dot {
  width: 6px;
  height: 6px;
  background: #94a3b8;
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out both;
}

.dot-1 { animation-delay: -0.32s; }
.dot-2 { animation-delay: -0.16s; }
.dot-3 { animation-delay: 0s; }

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}