:root {
    --primary-color: #2b2d42;
    --secondary-color: #8d99ae;
    --background-color: #edf2f4;
    --accent-color: #ef233c;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--background-color);
}

.container {
    display: flex;
    height: 100vh;
}

/* 侧边栏样式 */
.sidebar {
    width: 250px;
    background-color: white;
    border-right: 1px solid #ddd;
    padding: 20px;
}

.new-chat-btn {
    width: 100%;
    padding: 12px;
    background-color: black;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 20px;
}

.chat-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chat-item {
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.chat-item:hover {
    background-color: #f0f0f0;
}

.chat-item.active {
    background-color: #e0e0e0;
}

/* 主内容区域样式 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

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

.user-profile {
    width: 40px;
    height: 40px;
    background-color: black;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.user-profile span {
    color: white;
    font-size: 18px;
    font-weight: bold;
}

.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

.chat-input-container {
    padding: 20px;
    background-color: white;
    border-top: 1px solid #ddd;
    display: flex;
    gap: 10px;
}

textarea {
    flex: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    resize: none;
    height: 60px;
    font-family: 'Microsoft YaHei', sans-serif;
    font-size: 14px;
}

#sendButton {
    padding: 0 20px;
    background-color: black;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

/* 右键菜单样式 */
.context-menu {
    position: fixed;
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: none;
    z-index: 1000;
}

#avatarContextMenu {
    display: none;
    flex-direction: column;
    gap: 8px;
    min-width: 120px;
}

.menu-item {
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 4px;
    text-align: center;
}

.menu-item:hover {
    background-color: #f0f0f0;
}

.new-chat-btn:hover, #sendButton:hover {
    background-color: #333;
}

/* 消息气泡基本样式 */
.message {
    display: flex;
    margin-bottom: 20px;
    align-items: flex-start;
}

.message.user {
    flex-direction: row-reverse;
}

.message.assistant {
    flex-direction: row;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin: 0 10px;
    background-color: black;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.message.user .message-avatar {
    background-color: #4CAF50;
}

.message.assistant .message-avatar {
    background-color: black;
}

.message-content {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 12px;
    position: relative;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.message.user .message-content {
    background-color: #1a73e8;
    color: white;
}

.message.assistant .message-content {
    background-color: #e8eaed;
    color: black;
    border-radius: 0 15px 15px 15px;
    margin-left: 10px;
}

/* AI正在输入的动画 */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
    background-color: #e8eaed;
    border-radius: 12px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background-color: #666;
    border-radius: 50%;
    animation: typing 1s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* 代码块样式 */
.code-block {
    background-color: #f6f8fa;
    border-radius: 6px;
    padding: 16px;
    margin: 8px 0;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    line-height: 1.4;
    white-space: pre-wrap;
    word-break: break-all;
}

/* 数学公式样式 */
.math-formula {
    font-family: 'Times New Roman', Times, serif;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 2px 4px;
    border-radius: 4px;
    font-style: italic;
}

.message.assistant .message-content .code-block {
    background-color: #ffffff;
    border: 1px solid #e1e4e8;
}