/* 重新设计主内容区样式 */
.main-content {
    flex: 1;
    margin-left: 250px;
    display: flex;
    flex-direction: column;
    height: 100vh;
    background-color: #2a2f3c;
}

.chat-header {
    padding: 20px 40px;
    background-color: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-header h1 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: #ffffff;
}

.chat-header p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 30px 40px;
}

.message {
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
}

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

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

.message-content {
    max-width: 80%;
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 1rem;
    line-height: 1.6;
}

.user .message-content {
    background-color: #4a5568;
    color: #ffffff;
    border-radius: 12px 12px 0 12px;
}

.assistant .message-content {
    background-color: #1e2432;
    color: #ffffff;
    border-radius: 12px 12px 12px 0;
}

.chat-input {
    padding: 20px 40px;
    background-color: rgba(0, 0, 0, 0.2);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    gap: 15px;
}

.chat-input textarea {
    flex: 1;
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    font-size: 1rem;
    resize: none;
    outline: none;
    transition: border-color 0.3s;
    max-height: 120px;
}

.chat-input textarea:focus {
    border-color: rgba(255, 255, 255, 0.4);
}

.chat-input button {
    padding: 0 30px;
    background-color: #4a5568;
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.chat-input button:hover {
    background-color: #2d3748;
}

/* 滚动条样式 */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .main-content {
        margin-left: 0;
    }

    .chat-header, .chat-input {
        padding: 15px 20px;
    }

    .chat-messages {
        padding: 20px;
    }

    .message-content {
        max-width: 90%;
    }
}

.message.loading .message-content {
    color: rgba(255, 255, 255, 0.7);
    font-style: italic;
}

.message.loading .message-content::after {
    content: '...';
    animation: loading 1s infinite;
}

@keyframes loading {
    0% { content: '.'; }
    33% { content: '..'; }
    66% { content: '...'; }
}