/**
 * Vnote 微博客样式
 * 基于 weqoocu.com 的设计风格
 */

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

:root {
    /* 颜色方案 - 基于weqoocu.com */
    --color-primary: #0073aa;
    --color-primary-hover: #005a87;
    --color-text: #333;
    --color-text-light: #666;
    --color-text-lighter: #999;
    --color-background: #fff;
    --color-background-alt: #f5f5f5;
    --color-border: #e0e0e0;
    --color-link: #0073aa;
    --color-link-hover: #005a87;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    
    /* 行高 */
    --line-height-base: 1.6;
    --line-height-heading: 1.3;
    
    /* 边框圆角 */
    --border-radius: 4px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background-alt);
}

/* ===== 容器 ===== */
.container {
    width: 100%;
    padding: 0;
}

/* ===== 头部 ===== */
.site-header {
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-xl);
    width: 100%;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-sizing: border-box;
}

.site-branding {
    flex-shrink: 0;
}

.site-title {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.4;
    margin: 0 0 4px 0;
}

.site-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.2s;
}

.site-title a:hover {
    color: var(--color-primary);
}

.site-tagline {
    color: var(--color-text-light);
    font-size: 13px;
    margin: 0;
    line-height: 1.4;
}

.site-nav {
    display: flex;
    gap: 32px;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-nav a {
    color: #555555;
    text-decoration: none;
    font-size: 16px;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
    white-space: nowrap;
    display: inline-block;
}

.site-nav a:hover {
    color: var(--color-primary);
    background: #f8f9fa;
}

.site-nav a.nav-current {
    color: var(--color-primary);
    font-weight: 600;
}

/* ===== 汉堡菜单按钮 ===== */
.hamburger {
    display: none; /* 默认隐藏，仅在移动端显示 */
    padding: 8px;
    cursor: pointer;
    background: transparent;
    border: 0;
    margin: 0;
    outline: none;
    transition: opacity 0.2s;
}

.hamburger:hover {
    opacity: 0.7;
}

.hamburger-box {
    width: 28px;
    height: 24px;
    display: inline-block;
    position: relative;
}

.hamburger-inner {
    display: block;
    top: 50%;
    margin-top: -2px;
}

.hamburger-inner,
.hamburger-inner::before,
.hamburger-inner::after {
    width: 28px;
    height: 3px;
    background-color: var(--color-text);
    border-radius: 4px;
    position: absolute;
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.hamburger-inner::before,
.hamburger-inner::after {
    content: "";
    display: block;
}

.hamburger-inner::before {
    top: -8px;
}

.hamburger-inner::after {
    bottom: -8px;
}

/* 展开时变为 X 图标 */
.hamburger.is-active .hamburger-inner {
    transform: rotate(45deg);
}

.hamburger.is-active .hamburger-inner::before {
    top: 0;
    transform: rotate(90deg);
}

.hamburger.is-active .hamburger-inner::after {
    opacity: 0;
}

/* ===== 主内容区 ===== */
.site-main {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--color-background);
    padding: var(--spacing-lg) 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
    box-sizing: border-box;
}

/* ===== 搜索框 ===== */
.search-container {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.search-form {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-input {
    flex: 1;
    padding: 12px 88px 12px 16px; /* 右侧留出两个按钮的空间 */
    font-size: var(--font-size-base);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--color-background);
}

.search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 115, 170, 0.1);
}

.search-input::placeholder {
    color: var(--color-text-lighter);
}

/* 隐藏浏览器原生的清除按钮 */
.search-input::-webkit-search-cancel-button {
    display: none;
}

.search-input::-webkit-search-decoration {
    display: none;
}

.search-button {
    position: absolute;
    right: 8px; /* 搜索按钮放在最右侧 */
    top: 50%;
    transform: translateY(-50%);
    padding: 8px;
    background: transparent;
    border: none;
    color: var(--color-text-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    transition: color 0.2s, background-color 0.2s;
}

.search-button:hover {
    color: var(--color-primary);
    background-color: var(--color-background-alt);
}

.search-clear {
    position: absolute;
    right: 48px; /* 清除按钮放在搜索按钮左侧 */
    top: 50%;
    transform: translateY(-50%);
    padding: 8px;
    color: var(--color-text-light);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    transition: color 0.2s, background-color 0.2s;
}

.search-clear:hover {
    color: #e74c3c;
    background-color: rgba(231, 76, 60, 0.1);
}

.search-info {
    margin-top: 12px;
    padding: 12px;
    background: var(--color-background-alt);
    border-radius: var(--border-radius);
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.search-info strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* ===== 文章列表 ===== */
.posts-list {
    list-style: none;
}

.post-item {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.post-item:last-child {
    border-bottom: none;
}

.post-content {
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    margin-bottom: var(--spacing-sm);
    word-wrap: break-word;
}

.post-content a {
    color: var(--color-link);
    text-decoration: none;
    border-bottom: 1px solid var(--color-link);
    transition: all 0.2s;
}

.post-content a:hover {
    color: var(--color-link-hover);
    border-bottom-color: var(--color-link-hover);
}

/* ===== 图片样式 ===== */
.post-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.post-images img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.post-images img:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* 单张图片时 */
.post-images:has(img:only-child) {
    grid-template-columns: 1fr;
    max-width: 500px;
}

/* ===== 文章元信息 ===== */
.post-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-lighter);
}

.post-date {
    color: var(--color-text-light);
}

.post-date-link {
    color: var(--color-text-light);
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
}

.post-date-link:hover {
    color: var(--color-link);
    text-decoration: underline;
}

.post-date-link::after {
    content: ' 🔗';
    margin-left: 4px;
    font-size: 12px;
    opacity: 0.6;
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.pagination a {
    color: var(--color-link);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: all 0.2s;
}

.pagination a:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.pagination-info {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ===== 页脚 ===== */
.site-footer {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-lg) 20px;
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    box-sizing: border-box;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-light);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--color-primary);
}

.copyright {
    color: var(--color-text-lighter);
    font-size: var(--font-size-sm);
    margin: 0;
}

.copyright a {
    color: var(--color-link);
    text-decoration: none;
}

.copyright a:hover {
    text-decoration: underline;
}

/* ===== 错误和空状态 ===== */
.error-message,
.empty-message {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}

.error-message {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: var(--border-radius);
    color: #856404;
}

.error-hint {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.empty-message {
    font-size: var(--font-size-lg);
}

/* ===== 响应式设计 ===== */

/* 中等屏幕 - 1024px 以下，菜单间距缩小 */
@media (max-width: 1024px) {
    .header-inner {
        padding: 12px 16px;
    }
    
    .site-nav {
        gap: 20px;
    }
    
    .site-nav a {
        font-size: 15px;
        padding: 6px 10px;
    }
}

/* 平板和中等屏幕 - 768px 以下，进一步优化 */
@media (max-width: 768px) {
    .header-inner {
        padding: 10px 16px;
    }
    
    .site-branding {
        flex-shrink: 1;
        min-width: 0;
    }
    
    .site-title {
        font-size: 18px;
    }
    
    .site-tagline {
        font-size: 12px;
    }
    
    .site-nav {
        gap: 12px;
    }
    
    .site-nav a {
        font-size: 14px;
        padding: 6px 8px;
    }
    
    .site-main {
        padding: var(--spacing-md) 16px;
        margin-bottom: var(--spacing-xl);
    }
    
    .search-input {
        font-size: 15px;
        padding: 10px 40px 10px 12px;
    }
    
    .search-info {
        font-size: 13px;
    }
    
    .post-item {
        padding: var(--spacing-md) 0;
    }
    
    .post-images {
        grid-template-columns: 1fr;
    }
    
    .pagination {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .pagination a {
        width: 100%;
        text-align: center;
    }
}

/* 小平板 - 640px 以下，菜单开始换行或隐藏部分项 */
@media (max-width: 640px) {
    .header-inner {
        padding: 10px 12px;
    }
    
    .site-title {
        font-size: 16px;
    }
    
    .site-tagline {
        display: none; /* 隐藏副标题以节省空间 */
    }
    
    .site-nav {
        gap: 8px;
    }
    
    .site-nav a {
        font-size: 13px;
        padding: 5px 6px;
    }
}

/* 小屏幕手机 - 480px 以下，启用汉堡菜单 */
@media (max-width: 480px) {
    .header-inner {
        justify-content: space-between;
        padding: 12px;
    }
    
    .site-branding {
        flex: 1;
    }
    
    .site-title {
        font-size: 16px;
    }
    
    .site-tagline {
        display: none; /* 移动端隐藏副标题 */
    }
    
    /* 显示汉堡菜单按钮 */
    .hamburger {
        display: inline-block;
        z-index: 1001;
    }
    
    /* 导航菜单改为全屏侧边栏 */
    .site-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-background);
        box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
        padding: 80px 20px 20px;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        transition: right 0.3s ease;
        z-index: 1000;
        overflow-y: auto;
    }
    
    /* 导航菜单展开状态 */
    .site-nav.is-active {
        right: 0;
    }
    
    .site-nav a {
        width: 100%;
        padding: 12px 16px;
        border-radius: var(--border-radius);
        font-size: 16px;
    }
    
    /* 遮罩层 */
    .site-nav::before {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: transparent;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: -1;
    }
    
    .site-nav.is-active::before {
        opacity: 1;
        visibility: visible;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* ===== 辅助类 ===== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* ===== 加载动画 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.post-item {
    animation: fadeIn 0.3s ease-out;
}

/* ===== 打印样式 ===== */
@media print {
    .site-nav,
    .pagination,
    .site-footer {
        display: none;
    }
    
    .post-item {
        page-break-inside: avoid;
    }
}