/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 1px solid #eaeaea;
}

header h1 {
    color: #4a6fa5;
    margin-bottom: 10px;
}

main {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
}

/* 聊天容器样式 */
.chat-container {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.chat-header {
    background-color: #4a6fa5;
    color: white;
    padding: 15px;
    text-align: center;
}

.chat-messages {
    padding: 15px;
    height: 500px;
    overflow-y: auto;
}

.message {
    display: flex;
    margin-bottom: 20px;
    align-items: flex-start;
}

.message.received {
    justify-content: flex-start;
}

.message.sent {
    justify-content: flex-end;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 10px;
    flex-shrink: 0;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-content {
    background-color: #f1f1f1;
    padding: 10px 15px;
    border-radius: 18px;
    max-width: 70%;
}

.message.sent .message-content {
    background-color: #dcf8c6;
}

.sender {
    font-weight: bold;
    font-size: 0.9em;
    margin-bottom: 5px;
}

/* 头像上传容器样式 */
.avatar-upload-container {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

.avatar-upload-container h2 {
    color: #4a6fa5;
    margin-bottom: 20px;
    text-align: center;
}

.upload-section {
    text-align: center;
    margin-bottom: 20px;
}

.upload-btn {
    display: inline-block;
    background-color: #4a6fa5;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.upload-btn:hover {
    background-color: #3a5a80;
}

.cropper-container {
    margin-bottom: 20px;
}

.img-container {
    max-height: 300px;
    margin-bottom: 15px;
    overflow: hidden;
}

.img-container img {
    display: block;
    max-width: 100%;
}

.cropper-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.cropper-controls button {
    padding: 8px 15px;
    border: none;
    border-radius: 5px;
    background-color: #f1f1f1;
    cursor: pointer;
    transition: background-color 0.3s;
}

.cropper-controls button:hover {
    background-color: #e0e0e0;
}

.primary-btn {
    background-color: #4a6fa5 !important;
    color: white;
}

.primary-btn:hover {
    background-color: #3a5a80 !important;
}

.primary-btn:disabled {
    background-color: #cccccc !important;
    cursor: not-allowed;
}

.preview-container {
    text-align: center;
}

.preview-container h3 {
    margin-bottom: 15px;
    color: #4a6fa5;
}

.avatar-preview {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
    border: 2px solid #eaeaea;
}

.avatar-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px 0;
    color: #777;
    border-top: 1px solid #eaeaea;
}

/* 响应式设计 */
@media (max-width: 768px) {
    main {
        flex-direction: column;
        align-items: center;
    }
    
    .chat-container, .avatar-upload-container {
        width: 100%;
    }
}