/* ——— CHATBOT CSS ——— */
:root {
  --chat-primary: #38bdf8;
  --chat-bg: rgba(15, 23, 42, 0.9);
  --chat-border: rgba(56, 189, 248, 0.3);
  --chat-accent: #00ffcc;
}

.chatbot-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 10000;
  font-family: 'Inter', sans-serif;
}

.chatbot-toggle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--chat-primary);
  border: none;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  touch-action: none;
}

.chatbot-toggle:hover {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.8);
}

.chatbot-toggle svg {
  width: 30px;
  height: 30px;
  stroke: #fff;
}

.chatbot-window {
  position: absolute;
  bottom: 80px;
  right: 0;
  width: 380px;
  height: 550px;
  background: var(--chat-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--chat-border);
  border-radius: 16px;
  display: none;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  animation: chatSlideIn 0.3s ease-out;
}

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

.chat-header {
  padding: 15px 20px;
  background: rgba(56, 189, 248, 0.1);
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-header h3 {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  font-size: 14px;
  color: var(--chat-primary);
  letter-spacing: 1px;
}

.chat-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  color: var(--chat-accent);
}

.status-dot {
  width: 6px;
  height: 6px;
  background: var(--chat-accent);
  border-radius: 50%;
  box-shadow: 0 0 5px var(--chat-accent);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.5; }
  100% { transform: scale(1); opacity: 1; }
}

.chat-messages {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

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

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--chat-border);
  border-radius: 2px;
}

.message {
  max-width: 85%;
  padding: 10px 15px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.5;
  position: relative;
}

.message.ai {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
  border-bottom-left-radius: 2px;
}

.message.user {
  align-self: flex-end;
  background: var(--chat-primary);
  color: #fff;
  border-bottom-right-radius: 2px;
  min-width: 48px;
  min-height: 36px;
  word-break: break-word;
  overflow-wrap: break-word;
  white-space: pre-wrap;
  box-sizing: border-box;
}

.message code {
  background: rgba(0,0,0,0.3);
  padding: 2px 4px;
  border-radius: 4px;
  font-family: monospace;
  color: var(--chat-accent);
}

.chat-input-area {
  padding: 15px 20px;
  background: rgba(0,0,0,0.3);
  border-top: 1px solid var(--chat-border);
  display: flex;
  gap: 10px;
}

.chat-input {
  flex: 1;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--chat-border);
  border-radius: 8px;
  padding: 8px 12px;
  color: #fff;
  font-size: 13px;
  outline: none;
}

.chat-input:focus {
  border-color: var(--chat-primary);
  background: rgba(56, 189, 248, 0.05);
}

.chat-send {
  background: var(--chat-primary);
  border: none;
  border-radius: 8px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.chat-send:hover {
  transform: scale(1.1);
  box-shadow: 0 0 10px var(--chat-primary);
}

.typing-indicator {
  display: none;
  font-size: 11px;
  color: #64748b;
  margin-bottom: 10px;
  padding-left: 20px;
}

/* Hiệu ứng bong bóng thông báo */
.chatbot-notification {
  position: absolute;
  top: -5px;
  right: -5px;
  width: 20px;
  height: 20px;
  background: #ff3131;
  border-radius: 50%;
  color: #fff;
  font-size: 10px;
  display: none;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  animation: bounce 0.5s infinite alternate;
}

@keyframes bounce {
  from { transform: translateY(0); }
  to { transform: translateY(-5px); }
}