.chat-bubble {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #1874D1;
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(24, 116, 209, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.chat-bubble:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(24, 116, 209, 0.5);
}

.chat-bubble svg {
  width: 26px;
  height: 26px;
  fill: #fff;
}

.chat-panel {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 380px;
  height: 520px;
  background: #0A1924;
  border-radius: 16px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  z-index: 10000;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.chat-panel.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: #0F2233;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.chat-header-title {
  font-family: 'Roboto', sans-serif;
  font-weight: 700;
  font-size: 15px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chat-header-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
}

.chat-close {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  font-size: 20px;
  transition: color 0.15s;
}

.chat-close:hover {
  color: #fff;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 16px 8px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-messages::-webkit-scrollbar {
  width: 4px;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
}

.chat-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 12px;
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  line-height: 1.5;
  word-wrap: break-word;
}

.chat-msg.assistant {
  align-self: flex-start;
  background: #162A3D;
  color: #E2E8F0;
  border-bottom-left-radius: 4px;
}

.chat-msg.user {
  align-self: flex-end;
  background: #1874D1;
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-msg.error {
  align-self: flex-start;
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border-bottom-left-radius: 4px;
}

.chat-typing {
  align-self: flex-start;
  padding: 10px 14px;
  background: #162A3D;
  border-radius: 12px;
  border-bottom-left-radius: 4px;
  display: flex;
  gap: 4px;
  align-items: center;
}

.chat-typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  animation: chatTypingBounce 1.2s ease-in-out infinite;
}

.chat-typing-dot:nth-child(2) { animation-delay: 0.15s; }
.chat-typing-dot:nth-child(3) { animation-delay: 0.3s; }

@keyframes chatTypingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

.chat-input-area {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: #0F2233;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.chat-input {
  flex: 1;
  background: #162A3D;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 10px 14px;
  color: #E2E8F0;
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  outline: none;
  resize: none;
  min-height: 20px;
  max-height: 80px;
}

.chat-input::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

.chat-input:focus {
  border-color: #1874D1;
}

.chat-send {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #1874D1;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s;
}

.chat-send:hover {
  background: #1565C0;
}

.chat-send:disabled {
  background: rgba(24, 116, 209, 0.4);
  cursor: not-allowed;
}

.chat-send svg {
  width: 18px;
  height: 18px;
  fill: #fff;
}

.chat-footer {
  padding: 8px 16px;
  text-align: center;
  font-family: 'Roboto', sans-serif;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.25);
  background: #0A1924;
}

@media (max-width: 480px) {
  .chat-panel {
    top: 0;
    bottom: auto;
    right: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    border-radius: 0;
    transform-origin: bottom center;
  }

  .chat-panel.open {
    transform: translateY(0) scale(1);
  }

  .chat-panel.keyboard-open {
    height: calc(var(--vv-height, 100vh));
    transition: height 0.1s ease;
  }

  .chat-input {
    font-size: 16px; /* prevents iOS/Android zoom on focus */
  }

  .chat-bubble {
    bottom: 16px;
    right: 16px;
  }
}