/* ============================================
   FindBlog 主题 - 主样式表
   参考 Medium 设计风格
   ============================================ */

/* ===== 1. 基础样式 ===== */
:root {
    /* 颜色 */
    --primary-color: #1a8917;
    --primary-hover: #156d13;
    --text-primary: #242424;
    --text-secondary: #6b6b6b;
    --text-tertiary: #8b8b8b;
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f7;
    --bg-hover: #f2f2f2;
    --border-color: #e6e6e6;
    
    /* 强调色 */
    --accent-success: #1a8917;
    --accent-warning: #f5a623;
    --accent-error: #d0021b;
    
    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 28px;
    --font-size-2xl: 42px;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* 圆角 - 统一使用方角带圆角 */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-full: 50%;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* 过渡 */
    --transition-fast: 0.15s;
    --transition-base: 0.3s;
    --transition-slow: 0.5s;
    
    /* 布局 */
    --max-width: 1400px;
    --sidebar-left-width: 240px;
    --main-content-width: 680px;
    --sidebar-right-width: 320px;
    --header-height: 60px;
}

/* ===== 2. 重置样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

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

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
    outline: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== 3. 顶部导航栏 ===== */
.fb-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
}

.fb-header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

/* Logo */
.fb-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
}

.fb-logo img {
    width: 22px;
    height: 22px;
}

.fb-logo:hover {
    color: var(--primary-color);
}

/* 搜索框 */
.fb-search {
    flex: 1;
    max-width: 400px;
    position: relative;
    display: flex;
    align-items: center;
}

.fb-search i {
    position: absolute;
    left: var(--spacing-md);
    color: var(--text-tertiary);
    font-size: var(--font-size-lg);
}

.fb-search input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-sm) 44px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background-color: var(--bg-secondary);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.fb-search input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--bg-primary);
}

/* 头部操作按钮 */
.fb-header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.fb-btn-write {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    background-color: var(--primary-color);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.fb-btn-write:hover {
    background-color: var(--primary-hover);
    color: white;
}

.fb-btn-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: background-color 0.2s ease;
}

.fb-btn-icon:hover {
    background-color: var(--bg-hover);
}

.fb-btn-primary {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    background-color: var(--primary-color);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.fb-btn-primary:hover {
    background-color: var(--primary-hover);
    color: white;
}

.fb-btn-secondary {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    color: var(--primary-color);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.fb-btn-secondary:hover {
    background-color: var(--bg-hover);
    color: var(--primary-hover);
}

.fb-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    overflow: hidden;
}

.fb-user-avatar img {
    width: 22px;
    height: 22px;
    border-radius: 50%;  
    object-fit: cover;
    display: block;
}

/* ===== 4. 三栏布局 ===== */
.fb-main-layout {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    display: grid;
    grid-template-columns: var(--sidebar-left-width) 1fr var(--sidebar-right-width);
    gap: var(--spacing-2xl);
    align-items: start;
}

/* 左侧栏 */
.fb-sidebar-left {
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
}

.fb-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.fb-nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    transition: all 0.2s ease;
}

.fb-nav-item i {
    font-size: var(--font-size-lg);
}

.fb-nav-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.fb-nav-item.active {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
    font-weight: 600;
}

.fb-nav-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-sm) 0;
}

/* 中间内容区 */
.fb-main-content {
    min-height: 100vh;
}

/* 右侧栏 */
.fb-sidebar-right {
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
    max-height: calc(100vh - var(--header-height) - var(--spacing-lg) * 2);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    
    /* 隐藏滚动条但保持滚动功能 */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE 和 Edge */
}

/* 隐藏 Webkit 浏览器的滚动条 (Chrome, Safari) */
.fb-sidebar-right::-webkit-scrollbar {
    display: none;
}

/* ===== 5. 小部件样式 ===== */
.fb-widget {
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.fb-widget-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--text-primary);
}

.fb-widget-title i {
    color: var(--text-tertiary);
}

/* 推荐订阅卡片 */
.fb-recommended-feeds {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    padding: 0;
}

/* 响应式调整 */
@media (max-width: 1024px) {
    .fb-recommended-feeds {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-xs);
    }
}

@media (max-width: 768px) {
    .fb-recommended-feeds {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .fb-recommended-feeds {
        grid-template-columns: repeat(3, 1fr);
        gap: 2px;
    }
    
    .fb-feed-avatar {
        width: 32px;
        height: 32px;
    }
    
    .fb-feed-name {
        font-size: 10px;
    }
}

/* 网站公告样式 */
.fb-announcement-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.fb-announcement-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid rgba(230, 230, 230, 0.5);
    transition: background-color 0.2s ease;
}

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

.fb-announcement-item:hover {
    background-color: var(--bg-hover);
    border-radius: var(--radius-sm);
    padding-left: var(--spacing-xs);
    padding-right: var(--spacing-xs);
}

.fb-announcement-item i {
    color: var(--primary-color);
    font-size: 8px;
    margin-top: 6px;
    flex-shrink: 0;
}

.fb-announcement-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    line-height: 1.4;
    transition: color 0.2s ease;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.fb-announcement-link:hover {
    color: var(--primary-color);
}

.fb-feed-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.fb-feed-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, opacity 0.2s ease;
    width: 100%;
}

.fb-feed-link:hover {
    transform: translateY(-2px);
    opacity: 0.8;
}

.fb-feed-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-xs);
    box-shadow: var(--shadow-sm);
}

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

.fb-feed-name {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1.2;
}



.fb-feed-details h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.fb-feed-details p {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    line-height: 1.4;
}

.fb-btn-follow {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    background-color: var(--primary-color);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.fb-btn-follow:hover {
    background-color: var(--primary-hover);
}

/* 访问按钮样式 */
.fb-btn-visit {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.fb-btn-visit:hover {
    background-color: var(--primary-color);
    color: white;
}

/* 专辑列表 */
.fb-collections-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.fb-collection-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
}

.fb-collection-item:hover {
    background-color: var(--bg-hover);
}

.fb-collection-cover {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.fb-collection-placeholder {
    font-size: var(--font-size-xl);
    color: var(--text-tertiary);
}

.fb-collection-info h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.fb-collection-info p {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* 标签云 */
.fb-tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.fb-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    transition: all 0.2s ease;
}

.fb-tag:hover {
    background-color: var(--primary-color);
    color: white;
}

/* 广告小部件 */
.fb-ad-widget {
    background-color: var(--bg-secondary);
}

.fb-ad-label {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

/* 空状态 */
.fb-empty-state {
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

/* ===== 6. 底部 ===== */
.fb-footer {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.fb-footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.fb-footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.fb-footer-links a {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

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

.fb-footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

/* ===== 移动端按钮 ===== */
.fb-mobile-menu-toggle,
.fb-mobile-search-btn {
    display: none; /* 默认隐藏 */
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 20px;
    transition: all 0.2s ease;
    border-radius: var(--radius-md);
}

.fb-mobile-menu-toggle:hover,
.fb-mobile-search-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.fb-mobile-menu-toggle.active {
    background: var(--primary-color);
    color: white;
}

.fb-mobile-search-btn.active {
    background: var(--bg-hover);
    color: var(--primary-color);
}

/* ===== 移动端搜索遮罩层 ===== */
.fb-mobile-search-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.fb-mobile-search-overlay.active {
    display: block;
    opacity: 1;
}

.fb-mobile-search-container {
    width: 100%;
    height: 100%;
    padding: var(--spacing-lg);
}

.fb-mobile-search-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
}

.fb-mobile-search-header input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.fb-mobile-search-header input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-primary);
}

.fb-mobile-search-close {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 28px;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.fb-mobile-search-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ===== 7. 响应式设计 ===== */
@media (max-width: 1200px) {
    .fb-main-layout {
        grid-template-columns: 1fr var(--sidebar-right-width);
    }
    
    .fb-sidebar-left {
        display: none;
    }
    
    /* 显示移动端按钮 */
    .fb-mobile-menu-toggle,
    .fb-mobile-search-btn {
        display: flex;
    }
    
    /* 汉堡菜单激活时显示导航 */
    .fb-sidebar-left.menu-open {
        display: block;
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 280px;
        height: calc(100vh - var(--header-height));
        background: var(--bg-primary);
        border-right: 1px solid var(--border-color);
        padding: var(--spacing-lg);
        z-index: 1000;
        box-shadow: var(--shadow-md);
        overflow-y: auto;
    }
}

@media (max-width: 768px) {
    .fb-main-layout {
        /* 移动端改为flexbox布局，便于控制顺序 */
        display: flex;
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-lg);
    }
    
    /* 右侧边栏在移动端显示在主内容下方（默认） */
    .fb-sidebar-right {
        order: 1;
        width: 100%;
        position: static;
    }
    
    /* 主内容正常显示 */
    .fb-main-content {
        order: 0;
        width: 100%;
    }
    
    /* 用户主页特殊处理：资料卡在移动端显示在顶部 */
    .fb-user-profile-page .fb-sidebar-right {
        order: -1;
    }
    
    .fb-user-profile-page .fb-main-content {
        order: 0;
    }
    
    /* PC端搜索框在移动端隐藏 */
    .fb-search {
        display: none;
    }
    
    .fb-header-container {
        padding: 0 var(--spacing-md);
    }
    
    /* 保留网站标题在移动端 */
    .fb-logo-text {
        display: inline;
        font-size: var(--font-size-base);
    }
    
    /* 头像保持圆形 */
    .fb-user-avatar {
        border-radius: var(--radius-full);
    }
    
    /* 移动端登录按钮样式调整 */
    .fb-btn-primary {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}

/* ===== 图片懒加载样式 ===== */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

img.lazy-loading {
    opacity: 0.5;
    filter: blur(5px);
}

img.lazy-loaded {
    opacity: 1;
    filter: none;
}

img.lazy-error {
    opacity: 0.3;
}

/* ===== Toast 提示样式 ===== */
.fb-toast {
    position: fixed;
    top: 24px;
    right: 24px;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    z-index: 10000;
    opacity: 0;
    transform: translateX(100px);
    transition: all var(--transition-base) cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    max-width: 320px;
}

.fb-toast.show {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.fb-toast-success {
    background: var(--accent-success);
    color: white;
}

.fb-toast-error {
    background: var(--accent-error);
    color: white;
}

.fb-toast-warning {
    background: var(--accent-warning);
    color: white;
}

.fb-toast-info {
    background: var(--primary-color);
    color: white;
}

/* ===== 夜视模式切换按钮 ===== */
.fb-dark-mode-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-full);
    background-color: transparent;
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.fb-dark-mode-toggle:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.fb-dark-mode-toggle:active {
    transform: scale(0.95);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .fb-dark-mode-toggle {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
}