body { font-family: 'Inter', sans-serif; }
.highlight {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    transition: all 0.3s ease;
    border: none;
    color: white !important;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}
/* 确保send-message按钮有背景色 */
#send-message {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    border: none !important;
    transition: all 0.3s ease;
}
#send-message:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}
#send-message.bg-red-500 {
    background: #ef4444 !important;
}
/* 确保按钮在加载状态下也有背景色 */
#send-message.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
}
.message-bubble { max-width: 80%; word-wrap: break-word; overflow-wrap: break-word; }
.user-message {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 18px 18px 4px 18px;
}
.ai-message {
    background: #f8f9fa;
    color: #333;
    border-radius: 18px 18px 18px 4px;
    border: 1px solid #e9ecef;
}
.quick-reply-btn {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    border: 1px solid rgba(102, 126, 234, 0.2);
    transition: all 0.3s ease;
}
.quick-reply-btn:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
}
.chat-container {
    height: 500px;
}
@media (min-width: 768px) {
    .chat-container {
        height: 700px;
    }
}