/* =========================================
   1. 通用基础样式
   ========================================= */
body {
    font-family: '微软雅黑', sans-serif;
    background-color: #fdf6f9;
    color: #333;
    margin: 0;
    padding: 0;
    text-align: left;
}

/* =========================================
   2. 头部样式 (头像、导航)
   ========================================= */
header {
    padding: 50px 20px;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    text-align: center;
}

.avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #ffcbdb;
}

header h1 {
    margin: 15px 0 5px;
    color: #4a4a4a;
    text-align: center;
}

.tags {
    color: #888;
    font-size: 0.9em;
    margin-bottom: 20px;
    text-align: center;
}

.tag-item {
    background-color: #e3f2fd;
    padding: 3px 8px;
    border-radius: 10px;
    margin: 0 5px;
    display: inline-block;
}

nav {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.nav-btn {
    text-decoration: none;
    color: #fff;
    background-color: #ff9fb8;
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: bold;
    transition: 0.3s;
}

.nav-btn:hover {
    background-color: #ff7da0;
    transform: translateY(-2px);
}

/* =========================================
   3. 核心容器样式 (默认居中，服务于首页)
   ========================================= */
.container {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    
    /* 默认居中 (首页保持这个样子) */
    text-align: center; 
}

/* =========================================
   4. 【关键修改】日记模式专用样式
   只要 HTML 里加了 diary-mode 类，这里强制改为左对齐
   ========================================= */
.container.diary-mode {
    text-align: left !important; /* 强制左对齐 */
}

/* 强制日记模式下的标题、段落左对齐 */
.container.diary-mode h1,
.container.diary-mode h2,
.container.diary-mode p,
.container.diary-mode .diary-detail {
    text-align: left !important;
}

/* 确保日记模式下的h1标题左对齐 */
h1 {
    text-align: left;
}

/* 让日记列表左对齐 */
.container.diary-mode .diary-list {
    text-align: left;
    padding: 0;
    width: 100%;
}

/* 修正日记列表项布局 (左边标题，右边日期) */
.container.diary-mode .diary-item {
    display: flex;
    justify-content: space-between; 
    align-items: center;
    padding: 15px 10px;
    border-bottom: 1px dashed #ffd1dc;
    text-align: left;
}

.container.diary-mode .diary-item:hover {
    background-color: #fff0f5;
    padding-left: 15px;
    border-radius: 8px;
}

.diary-title {
    text-decoration: none;
    color: #4a4a4a;
    font-size: 1.1em;
    font-weight: bold;
    flex: 1;
    text-align: left;
}

.diary-date {
    color: #999;
    font-size: 0.9em;
    margin-left: 20px;
    font-family: Consolas, monospace;
    white-space: nowrap;
}

/* 日记详情页的正文样式 */
.diary-detail p {
    margin-bottom: 20px;
    line-height: 1.8;
    text-align: left; /* 左对齐 */
}

.subtitle {
    text-align: left;
    color: #999;
    font-size: 0.9em;
    margin-bottom: 30px;
    border-bottom: 1px solid #eee;
    padding-bottom: 20px;
    display: block;
}

/* 返回按钮：在日记模式下靠左 */
.container.diary-mode .back-btn {
    display: inline-block; /* 只有变成块级或行内块才能控制边距 */
    margin: 40px 0 0 0;    /* 靠左，不自动居中 */
    text-align: center;    /* 按钮里的字居中 */
}

/* 普通模式下的返回按钮 (如果别的地方用到) */
.back-btn {
    display: block;
    width: fit-content;
    margin: 40px auto 0;
    padding: 10px 30px;
    background-color: #ff9fb8;
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: 0.9em;
    transition: 0.3s;
}

.back-btn:hover {
    background-color: #ff7da0;
}

/* =========================================
   5. 页脚
   ========================================= */
footer {
    margin-top: 50px;
    padding: 20px;
    color: #aaa;
    font-size: 0.8em;
    text-align: center;
}

/* =========================================
   6. 手机端适配
   ========================================= */
@media (max-width: 768px) {
    .container {
        margin: 20px;
        padding: 15px;
    }
    
    header {
        padding: 30px 15px;
    }
    
    nav {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .nav-btn {
        width: 80%;
        text-align: center;
    }
    
    .container.diary-mode .diary-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .diary-date {
        margin-left: 0;
    }
}