* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f0f2f5;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 700px;
  height: 90vh;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: #1a56db;
  color: #fff;
}

.avatar {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.header-info h1 {
  font-size: 1.1rem;
  font-weight: 600;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #4ade80;
  border-radius: 50%;
  margin-right: 4px;
}

.status-text {
  font-size: 0.8rem;
  opacity: 0.85;
}

/* Chat window */
.chat-window {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  display: flex;
}

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

.message.assistant {
  justify-content: flex-start;
}

.bubble {
  max-width: 70%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 0.95rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.message.user .bubble {
  background: #1a56db;
  color: #fff;
  border-bottom-right-radius: 4px;
}

.message.assistant .bubble {
  background: #f3f4f6;
  color: #111827;
  border-bottom-left-radius: 4px;
}

.typing .bubble {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 14px 18px;
}

.dot {
  width: 8px;
  height: 8px;
  background: #9ca3af;
  border-radius: 50%;
  animation: bounce 1.2s infinite;
}

.dot:nth-child(2) { animation-delay: 0.2s; }
.dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-6px); }
}

/* Input area */
.input-area {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 14px 16px;
  border-top: 1px solid #e5e7eb;
  background: #fff;
}

textarea {
  flex: 1;
  resize: none;
  border: 1px solid #d1d5db;
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 0.95rem;
  font-family: inherit;
  line-height: 1.5;
  outline: none;
  transition: border-color 0.2s;
  max-height: 120px;
  overflow-y: auto;
}

textarea:focus {
  border-color: #1a56db;
}

#send-btn {
  width: 44px;
  height: 44px;
  background: #1a56db;
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s;
}

#send-btn:hover {
  background: #1648c0;
}

#send-btn:disabled {
  background: #9ca3af;
  cursor: not-allowed;
}

#call-btn {
  width: 40px;
  height: 40px;
  background: #16a34a;
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s;
  margin-left: 6px;
}

#call-btn:hover { background: #15803d; }
#call-btn:disabled { background: #9ca3af; cursor: not-allowed; }
#call-btn.active-call { background: #dc2626; }
#call-btn.active-call:hover { background: #b91c1c; }

#call-overlay {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: #1e293b;
  color: #fff;
  border-radius: 12px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  z-index: 100;
}

#call-status-text { font-size: 14px; }

#call-overlay button {
  background: #dc2626;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 6px 14px;
  cursor: pointer;
  font-size: 13px;
}

#call-overlay button:hover { background: #b91c1c; }