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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #8b5cf6 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

#chat-container {
  width: 100%;
  max-width: 440px;
  height: 680px;
  background: #ffffff;
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

#chat-header {
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  color: white;
  padding: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.8);
  position: absolute;
  top: 26px;
  left: 24px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.status-indicator.offline {
  background: #ef4444;
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.8);
}

#chat-header h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-left: 16px;
}

.subtitle {
  font-size: 13px;
  opacity: 0.85;
  margin-left: 16px;
  font-weight: 400;
}

#minimize-btn {
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 18px;
  display: none;
  transition: all 0.2s;
}

#minimize-btn:hover {
  background: rgba(255, 255, 255, 0.25);
}

#chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  background: linear-gradient(to bottom, #f8fafc 0%, #f1f5f9 100%);
  scroll-behavior: smooth;
}

#chat-messages::-webkit-scrollbar {
  width: 6px;
}

#chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

#chat-messages::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 3px;
}

#chat-messages::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

.message {
  margin-bottom: 20px;
  animation: slideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message-content {
  padding: 14px 18px;
  border-radius: 18px;
  max-width: 85%;
  word-wrap: break-word;
  line-height: 1.5;
  font-size: 15px;
  position: relative;
}

.message.user {
  align-items: flex-end;
}

.message.user .message-content {
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  color: white;
  border-bottom-right-radius: 6px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.message.assistant {
  align-items: flex-start;
}

.message.assistant .message-content {
  background: white;
  color: #1e293b;
  border: 1px solid #e2e8f0;
  border-bottom-left-radius: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.message-time {
  font-size: 12px;
  color: #64748b;
  margin-top: 6px;
  font-weight: 500;
  padding: 0 4px;
}

#typing-indicator {
  padding: 0 24px 12px;
  background: transparent;
  display: flex;
  align-items: center;
}

#typing-indicator.hidden {
  display: none;
}

.typing-dots {
  background: white;
  border: 1px solid #e2e8f0;
  padding: 14px 18px;
  border-radius: 18px;
  border-bottom-left-radius: 6px;
  display: inline-flex;
  gap: 5px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.typing-dots span {
  width: 7px;
  height: 7px;
  background: #94a3b8;
  border-radius: 50%;
  animation: typing 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% {
    opacity: 0.3;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-6px);
  }
}

#chat-input-container {
  padding: 20px 24px 24px;
  background: white;
  border-top: 1px solid #e2e8f0;
  display: flex;
  gap: 10px;
}

#chat-input {
  flex: 1;
  padding: 14px 18px;
  border: 2px solid #e2e8f0;
  border-radius: 14px;
  font-size: 15px;
  outline: none;
  transition: all 0.2s;
  font-family: inherit;
}

#chat-input:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

#chat-input:disabled {
  background: #f1f5f9;
  cursor: not-allowed;
  border-color: #e2e8f0;
}

#send-btn {
  padding: 14px 28px;
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  color: white;
  border: none;
  border-radius: 14px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

#send-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

#send-btn:active:not(:disabled) {
  transform: translateY(0);
}

#send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

#chat-launcher {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

#chat-launcher:hover {
  transform: scale(1.15);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.5);
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: white;
  padding: 40px;
  border-radius: 24px;
  width: 90%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: modalSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-content h2 {
  margin-bottom: 28px;
  color: #1e293b;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 10px;
  color: #334155;
  font-weight: 600;
  font-size: 14px;
}

.form-group input {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid #e2e8f0;
  border-radius: 14px;
  font-size: 15px;
  outline: none;
  transition: all 0.2s;
  font-family: inherit;
}

.form-group input:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.modal-content button[type="submit"] {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  color: white;
  border: none;
  border-radius: 14px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.modal-content button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.form-footer {
  margin-top: 20px;
  text-align: center;
  font-size: 13px;
  color: #64748b;
  line-height: 1.5;
}

@media (max-width: 480px) {
  body {
    padding: 0;
  }

  #chat-container {
    max-width: 100%;
    height: 100vh;
    border-radius: 0;
  }
}