/**
 * 网站导航样式
 *
 * 对接父主题的变量系统，支持夜间模式
 * 参考 AI 工具导航页面设计
 *
 * @package    Hui
 * @subpackage Site_Navigation
 * @since      1.3.0
 */

/* ============================================
   页面容器
   ============================================ */
.hui-site-navigation-page {
    background: var(--color-bg-layout);
    min-height: 100vh;
}

/* ============================================
   Hero 区域
   ============================================ */
.hui-nav-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 300px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

/* Hero 背景装饰 */
.hui-nav-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent 70%);
    animation: huiNavHeroFloat 20s ease-in-out infinite;
}

@keyframes huiNavHeroFloat {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    50% {
        transform: translate(-20px, 20px) rotate(5deg);
    }
}

.hui-nav-hero-inner {
    max-width: var(--xun-container-width, 1200px);
    width: 100%;
    margin: 0 auto;
    padding: 0 1rem;
    position: relative;
    z-index: 1;
    text-align: center;
}

.hui-nav-hero-title {
    color: #fff;
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 1rem;
    line-height: 1.2;
}

.hui-nav-hero-desc {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin: 0 0 2rem;
    line-height: 1.6;
}

.hui-nav-hero-desc p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

/* ============================================
   搜索框
   ============================================ */
.hui-nav-search-box {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.hui-nav-search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    pointer-events: none;
}

.hui-nav-search-input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 3rem;
    font-size: 1rem;
    border: none;
    border-radius: var(--xun-radius-lg, 12px);
    background: var(--color-bg-container);
    color: var(--color-text);
    box-shadow: var(--shadow-lg);
    transition: all 0.2s;
}

.hui-nav-search-input:focus {
    outline: none;
    box-shadow: var(--shadow-lg), 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.hui-nav-search-input::placeholder {
    color: var(--color-text-tertiary);
}

/* ============================================
   内容容器
   ============================================ */
.hui-nav-container {
    max-width: var(--xun-container-width, 1200px);
    margin: 0 auto;
    padding: 6rem 1rem 3rem; /* 增加上边距，为固定头部导航留出空间 */
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 1.5rem;
    position: relative;
}

/* ============================================
   侧边栏分类
   ============================================ */
.hui-nav-sidebar {
    position: sticky;
    top: 6rem; /* 调整粘性定位的顶部距离，与容器上边距保持一致 */
    height: fit-content;
}

.hui-nav-categories {
    padding: 0.5rem;
    background: var(--color-bg-container);
    border-radius: var(--xun-radius, 8px);
    box-shadow: var(--shadow-sm);
}

.hui-nav-cat-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.625rem 0.875rem;
    border: none;
    border-radius: var(--xun-radius, 8px);
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
}

.hui-nav-cat-item:hover {
    background: var(--color-fill-tertiary);
    color: var(--color-text);
}

.hui-nav-cat-item.is-active {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

.hui-nav-cat-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.hui-nav-cat-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.hui-nav-cat-name {
    flex: 1;
}

/* ============================================
   主内容区域
   ============================================ */
.hui-nav-main {
    min-height: 400px;
}

.hui-nav-section {
    display: block;
    margin-bottom: 3rem;
    /* 为滚动定位预留顶部空间，避免被固定导航遮挡 */
    scroll-margin-top: 200px;
    /* 兼容旧版浏览器 */
    scroll-snap-margin-top: 200px;
}

.hui-nav-section:last-child {
    margin-bottom: 0;
}

.hui-nav-section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-border-secondary);
}

.hui-nav-section-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.hui-nav-section-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ============================================
   导航卡片网格 - 参考图片样式
   ============================================ */
.hui-nav-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
}

/* ============================================
   导航卡片 - 横向布局
   ============================================ */
.hui-nav-card {
    padding: 1rem;
    text-decoration: none;
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
    transition: all 0.2s;
    background: var(--color-bg-container);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--xun-radius, 8px);
}

.hui-nav-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.hui-nav-card-logo {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: var(--xun-radius, 8px);
    background: var(--color-fill-quaternary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hui-nav-card-logo img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
}

.hui-nav-card-content {
    flex: 1;
    min-width: 0;
}

.hui-nav-card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.hui-nav-card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
    line-height: 1.4;
}

.hui-nav-card-badge {
    font-size: 0.6875rem;
    padding: 0.125rem 0.375rem;
    flex-shrink: 0;
}

.hui-nav-card-desc {
    color: var(--color-text-tertiary);
    font-size: 0.8125rem;
    line-height: 1.5;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ============================================
   空状态和无结果
   ============================================ */
.hui-nav-empty,
.hui-nav-no-results {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-tertiary);
}

.hui-nav-empty p,
.hui-nav-no-results p {
    font-size: 1.125rem;
    margin: 0;
    color: var(--color-text-tertiary);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .hui-nav-container {
        grid-template-columns: 180px 1fr;
        gap: 1rem;
    }
    
    .hui-nav-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .hui-nav-hero {
        height: 250px;
    }
    
    .hui-nav-hero-title {
        font-size: 2rem;
    }
    
    .hui-nav-hero-desc {
        font-size: 1rem;
    }
    
    .hui-nav-container {
        grid-template-columns: 1fr;
        padding: 1.5rem 1rem 2rem;
        gap: 1.5rem;
    }
    
    .hui-nav-sidebar {
        display: none;
    }
    
    .hui-nav-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hui-nav-hero {
        height: 200px;
    }
    
    .hui-nav-hero-title {
        font-size: 1.75rem;
    }
    
    .hui-nav-card {
        padding: 0.875rem;
    }
    
    .hui-nav-card-logo {
        width: 40px;
        height: 40px;
    }
}

/* 无搜索结果提示 */
.hui-nav-no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--xun-text-secondary);
}

.hui-nav-no-results p {
    font-size: 16px;
    margin: 0;
}

/* 空分类提示 */
.hui-nav-empty-category {
    text-align: center;
    padding: 40px 20px;
    color: var(--xun-text-secondary);
    background: var(--xun-bg-secondary);
    border-radius: 8px;
}

.hui-nav-empty-category p {
    font-size: 14px;
    margin: 0;
}