/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: #f5f5f7;
    color: #333;
}

/* 容器布局 */
.container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* 侧边栏样式 */
.sidebar {
    width: 300px;
    background-color: #ffffff;
    border-right: 1px solid #e0e0e0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid #e0e0e0;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #1a73e8;
    margin-bottom: 20px;
}

.new-chat-btn {
    width: 100%;
    padding: 12px;
    background-color: #f0f0f0;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.new-chat-btn:hover {
    background-color: #e8f0fe;
    border-color: #1a73e8;
    color: #1a73e8;
}

/* 聊天历史 */
.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0;
}

.chat-item {
    padding: 12px 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    border-radius: 0 20px 20px 0;
    margin-right: 10px;
}

.chat-item:hover {
    background-color: #f8f9fa;
}

.chat-item.active {
    background-color: #e8f0fe;
    color: #1a73e8;
}

.chat-preview {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-title {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
}

.chat-time {
    font-size: 12px;
    color: #666;
}

/* 主内容区 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 聊天容器 */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: #ffffff;
}

.chat-header {
    padding: 20px 30px;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h2 {
    font-size: 18px;
    font-weight: 500;
    color: #333;
}

.chat-actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    background: none;
    border: none;
    font-size: 16px;
    color: #666;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background-color: #f0f0f0;
    color: #333;
}

/* 消息区域 */
.messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 消息样式 */
.message {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.message-content {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.bot-avatar {
    background-color: #e8f0fe;
    color: #1a73e8;
}

.user-avatar {
    background-color: #f0f0f0;
    color: #666;
}

.message-text {
    flex: 1;
    max-width: 70%;
}

.message-text p {
    line-height: 1.6;
    font-size: 15px;
    color: #333;
}

/* 输入区域 */
.input-container {
    padding: 20px 30px;
    background-color: #f5f5f7;
    border-top: 1px solid #e0e0e0;
}

.input-wrapper {
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 24px;
    padding: 10px 15px;
    display: flex;
    align-items: flex-end;
    gap: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

#user-input {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    font-size: 15px;
    line-height: 1.6;
    padding: 10px 0;
    font-family: inherit;
    max-height: 120px;
    overflow-y: auto;
}

#user-input::placeholder {
    color: #999;
}

.input-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.send-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: #1a73e8;
    border: none;
    color: #ffffff;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-btn:hover {
    background-color: #1557b0;
    transform: scale(1.05);
}

.send-btn:active {
    transform: scale(0.95);
}

.input-footer {
    margin-top: 10px;
    text-align: center;
}

.tip {
    font-size: 12px;
    color: #999;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        width: 250px;
    }
    
    .message-text {
        max-width: 85%;
    }
    
    .chat-container {
        padding: 15px;
    }
    
    .input-container {
        padding: 15px;
    }
}