/*
Theme Name: Educational Theme
Description: A formal and professional theme for educational institutions
Version: 1.0
Author: Educational Media
*/

/* CSS Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Times New Roman', 'Noto Serif JP', 'Yu Mincho', serif;
    line-height: 1.8;
    color: #1a1a1a;
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* CSS Custom Properties */
:root {
    --color-primary: #1e3a8a;
    --color-primary-dark: #1e2063;
    --color-secondary: #64748b;
    --color-accent: #dc2626;
    --color-text: #1a1a1a;
    --color-text-light: #64748b;
    --color-bg: #ffffff;
    --color-bg-light: #f8fafc;
    --color-bg-dark: #1e293b;
    --color-border: #d1d5db;
    --color-border-light: #e5e7eb;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.125rem;
    --radius-md: 0.25rem;
    --radius-lg: 0.375rem;
    --radius-xl: 0.5rem;
    
    --max-width: 1200px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    left: -9999px;
    z-index: 999999;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
}

.skip-link:focus {
    left: var(--space-md);
    top: var(--space-md);
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-xl);
    }
}

/* Header */
.site-header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.top-nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 80px;
    gap: var(--space-lg);
}

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

.site-title {
    margin: 0;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: 1.2;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

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

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

/* Navigation */
.main-navigation-container {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
}

@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }
}

.menu-toggle:hover {
    background-color: var(--color-bg-light);
}

.hamburger {
    width: 24px;
    height: 3px;
    background-color: var(--color-text);
    transition: all 0.3s ease;
    border-radius: 1px;
}

.menu-toggle.is-active .hamburger:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle.is-active .hamburger:nth-child(2) {
    opacity: 0;
}

.menu-toggle.is-active .hamburger:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.primary-menu {
    display: none;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .primary-menu {
        display: flex;
    }
}

.primary-menu li {
    position: relative;
}

.primary-menu a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    border-radius: var(--radius-sm);
    position: relative;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.primary-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.primary-menu a:hover::after {
    width: 80%;
}

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

/* Mobile Menu */
.main-navigation.is-open .primary-menu {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    margin-top: var(--space-sm);
}

/* Main Content */
.site-main {
    padding: var(--space-xl) 0;
    min-height: 70vh;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

/* Hero Section */
.hero-section {
    text-align: center;
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e2063 100%);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2xl);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.05) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.05) 75%), 
                linear-gradient(45deg, rgba(255,255,255,0.05) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.05) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    padding: 0 var(--space-lg);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin: 0 0 var(--space-lg) 0;
    line-height: 1.3;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-2xl);
    }
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.7;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding: var(--space-3xl) 0;
    background: var(--color-bg-light);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(30, 58, 138, 0.03) 25%, transparent 25%, transparent 75%, rgba(30, 58, 138, 0.03) 75%), 
                linear-gradient(45deg, rgba(30, 58, 138, 0.03) 25%, transparent 25%, transparent 75%, rgba(30, 58, 138, 0.03) 75%);
    background-size: 30px 30px;
    background-position: 0 0, 15px 15px;
    pointer-events: none;
}

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin: 0 0 var(--space-md) 0;
    color: var(--color-text);
    position: relative;
    z-index: 1;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.page-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin: 0;
    position: relative;
    z-index: 1;
    font-weight: 400;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

@media (max-width: 1024px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg);
    }
}

@media (max-width: 640px) {
    .articles-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

/* Article Card */
.article-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 2px solid var(--color-border-light);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(30, 58, 138, 0.02);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 1;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
    border-color: var(--color-primary);
}

.article-card:hover::before {
    opacity: 1;
}

.article-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/10;
    background: var(--color-bg-light);
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-card .article-content {
    padding: var(--space-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 2;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.article-category {
    background: var(--color-primary);
    color: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.article-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left 0.4s ease;
}

.article-category:hover::before {
    left: 100%;
}

.article-category:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.article-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 500;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.article-title {
    margin: 0 0 var(--space-lg) 0;
    font-size: var(--font-size-xl);
    line-height: 1.4;
    font-weight: 700;
    color: var(--color-text);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.article-title a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.article-title a:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.article-excerpt {
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    flex: 1;
    line-height: 1.7;
    font-size: var(--font-size-base);
    font-weight: 400;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.article-card .article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    position: relative;
}

.article-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.article-card:hover .article-author {
    opacity: 1;
}

.author-avatar {
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    border: 2px solid var(--color-border);
    transition: all 0.3s ease;
    background: var(--color-bg-light);
    padding: var(--space-xs);
    color: var(--color-primary);
    flex-shrink: 0;
}

.article-card:hover .author-avatar {
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.author-name {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    font-weight: 600;
    transition: color 0.3s ease;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.article-card:hover .author-name {
    color: var(--color-primary);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 700;
    font-size: var(--font-size-sm);
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    background: white;
    position: relative;
    overflow: hidden;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.read-more::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-primary);
    transition: left 0.3s ease;
    z-index: -1;
}

.read-more:hover::before {
    left: 0;
}

.read-more:hover {
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.read-more svg {
    transition: transform 0.3s ease;
}

.read-more:hover svg {
    transform: translateX(2px);
}

/* Pagination */
.pagination-nav {
    margin-top: var(--space-2xl);
    text-align: center;
    padding: var(--space-lg) 0;
}

.pagination-nav .nav-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.page-numbers a,
.page-numbers span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-md);
    min-width: 44px;
    min-height: 44px;
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: white;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.page-numbers a:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.page-numbers .current {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.page-numbers .dots {
    border: none;
    background: transparent;
    color: var(--color-text-light);
    font-weight: 700;
    box-shadow: none;
    cursor: default;
    min-width: auto;
}

.page-numbers .dots:hover {
    background: transparent;
    color: var(--color-text-light);
    border: none;
    transform: none;
    box-shadow: none;
}

.page-numbers .prev,
.page-numbers .next {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    min-width: auto;
    font-weight: 600;
}

.page-numbers .prev svg,
.page-numbers .next svg {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.page-numbers .prev:hover svg {
    transform: translateX(-2px);
}

.page-numbers .next:hover svg {
    transform: translateX(2px);
}

/* Single Article Styles */
.single-article {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--color-border-light);
}

/* Single Article Header */
.single-article .article-header {
    padding: var(--space-2xl);
    border-bottom: 2px solid var(--color-border-light);
    background: var(--color-bg-light);
    position: relative;
}

.single-article .article-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(30, 58, 138, 0.02) 25%, transparent 25%, transparent 75%, rgba(30, 58, 138, 0.02) 75%), 
                linear-gradient(45deg, rgba(30, 58, 138, 0.02) 25%, transparent 25%, transparent 75%, rgba(30, 58, 138, 0.02) 75%);
    background-size: 30px 30px;
    background-position: 0 0, 15px 15px;
    pointer-events: none;
}

/* Single Article Breadcrumb */
.single-article .article-breadcrumb {
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 1;
}

.single-article .article-breadcrumb ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .article-breadcrumb li {
    color: var(--color-text-light);
}

.single-article .article-breadcrumb li:not(:last-child)::after {
    content: '▶';
    margin-left: var(--space-sm);
    color: var(--color-primary);
    font-size: var(--font-size-xs);
}

.single-article .article-breadcrumb a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.single-article .article-breadcrumb a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Single Article Meta Top */
.single-article .article-meta-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 1;
}

.single-article .article-categories {
    display: flex;
    gap: var(--space-sm);
}

.single-article .category-link {
    background: var(--color-primary);
    color: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .category-link:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

.single-article .article-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 500;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

/* Single Article Title */
.single-article .article-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
    margin: 0 0 var(--space-xl) 0;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .single-article .article-title {
        font-size: var(--font-size-2xl);
    }
}

/* Single Article Featured Image */
.single-article .article-featured-image {
    margin: var(--space-xl) 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid var(--color-border);
    position: relative;
    z-index: 1;
}

.single-article .article-featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Single Article Meta Bottom */
.single-article .article-meta-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-top: var(--space-xl);
    position: relative;
    z-index: 1;
}

.single-article .article-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.single-article .author-avatar {
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 2px solid var(--color-border);
    background: var(--color-bg-light);
    padding: var(--space-sm);
    color: var(--color-primary);
    flex-shrink: 0;
    width: 48px;
    height: 48px;
}

.single-article .author-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.single-article .author-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .author-name {
    font-size: var(--font-size-base);
    color: var(--color-text);
    font-weight: 700;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .article-stats {
    display: flex;
    align-items: center;
}

.single-article .reading-time {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

/* Single Article Content */
.single-article .article-content {
    padding: var(--space-2xl);
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .article-content p {
    margin: 0 0 var(--space-lg) 0;
}

.single-article .article-content h2,
.single-article .article-content h3,
.single-article .article-content h4,
.single-article .article-content h5,
.single-article .article-content h6 {
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
    font-weight: 700;
    color: var(--color-text);
    margin: var(--space-2xl) 0 var(--space-lg) 0;
    line-height: 1.4;
}

.single-article .article-content h2 {
    font-size: var(--font-size-2xl);
    border-bottom: 3px solid var(--color-primary);
    padding-bottom: var(--space-sm);
}

.single-article .article-content h3 {
    font-size: var(--font-size-xl);
    border-left: 4px solid var(--color-primary);
    padding-left: var(--space-md);
}

.single-article .article-content h4 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
}

.single-article .article-content blockquote {
    margin: var(--space-xl) 0;
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg-light);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-style: italic;
    position: relative;
}

.single-article .article-content blockquote::before {
    content: '"';
    font-size: var(--font-size-4xl);
    color: var(--color-primary);
    position: absolute;
    top: 0;
    left: var(--space-md);
    font-family: serif;
}

.single-article .article-content ul,
.single-article .article-content ol {
    margin: var(--space-lg) 0;
    padding-left: var(--space-xl);
}

.single-article .article-content li {
    margin-bottom: var(--space-sm);
}

.single-article .article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border);
    margin: var(--space-lg) 0;
}

/* Single Article Page Links */
.single-article .page-links {
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    background: var(--color-bg-light);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: center;
}

.single-article .page-links-title {
    font-weight: 700;
    color: var(--color-text);
    margin-right: var(--space-md);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .page-links a {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    margin: 0 var(--space-xs);
    background: white;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .page-links a:hover {
    background: var(--color-primary);
    color: white;
}

/* Single Article Tags */
.single-article .article-tags {
    padding: var(--space-xl) var(--space-2xl);
    border-top: 2px solid var(--color-border-light);
    background: var(--color-bg-light);
}

.single-article .tags-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 var(--space-lg) 0;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.single-article .tag-link {
    background: white;
    color: var(--color-text);
    padding: var(--space-xs) var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all 0.3s ease;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .tag-link:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

/* Single Article Footer */
.single-article .article-footer {
    padding: var(--space-2xl);
    border-top: 2px solid var(--color-border-light);
    background: white;
}

.single-article .share-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 var(--space-lg) 0;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .share-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.single-article .share-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: white;
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all 0.3s ease;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-article .share-button.twitter:hover {
    background: #1da1f2;
    color: white;
    border-color: #1da1f2;
}

.single-article .share-button.facebook:hover {
    background: #4267b2;
    color: white;
    border-color: #4267b2;
}

.single-article .share-button.email:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Post Navigation */
.post-navigation {
    margin: var(--space-2xl) auto;
    max-width: 1000px;
}

.nav-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

@media (max-width: 768px) {
    .nav-links {
        grid-template-columns: 1fr;
    }
}

.nav-previous,
.nav-next {
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.nav-previous:hover,
.nav-next:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.nav-previous a,
.nav-next a {
    display: block;
    padding: var(--space-lg);
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-previous a:hover,
.nav-next a:hover {
    color: var(--color-primary);
}

.nav-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.nav-next .nav-indicator {
    justify-content: flex-end;
}

.nav-title {
    font-size: var(--font-size-base);
    font-weight: 700;
    line-height: 1.4;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.nav-next .nav-title {
    text-align: right;
}

/* Related Posts */
.related-posts {
    margin: var(--space-3xl) auto;
    max-width: 1000px;
    padding: var(--space-2xl);
    background: var(--color-bg-light);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.related-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 var(--space-xl) 0;
    text-align: center;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
}

.related-article {
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.related-article:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.related-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.related-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.related-article:hover .related-image img {
    transform: scale(1.05);
}

.related-content {
    padding: var(--space-lg);
}

.related-article-title {
    margin: 0 0 var(--space-sm) 0;
    font-size: var(--font-size-base);
    line-height: 1.4;
    font-weight: 600;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.related-article-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.related-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

/* Single Page Styles */
.single-page {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--color-border-light);
}

/* Page Header Content */
.single-page .page-header-content {
    padding: var(--space-2xl);
    border-bottom: 2px solid var(--color-border-light);
    background: var(--color-bg-light);
    position: relative;
}

.single-page .page-header-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(30, 58, 138, 0.02) 25%, transparent 25%, transparent 75%, rgba(30, 58, 138, 0.02) 75%), 
                linear-gradient(45deg, rgba(30, 58, 138, 0.02) 25%, transparent 25%, transparent 75%, rgba(30, 58, 138, 0.02) 75%);
    background-size: 30px 30px;
    background-position: 0 0, 15px 15px;
    pointer-events: none;
}

/* Page Breadcrumb */
.single-page .page-breadcrumb {
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 1;
}

.single-page .page-breadcrumb ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-page .page-breadcrumb li {
    color: var(--color-text-light);
}

.single-page .page-breadcrumb li:not(:last-child)::after {
    content: '▶';
    margin-left: var(--space-sm);
    color: var(--color-primary);
    font-size: var(--font-size-xs);
}

.single-page .page-breadcrumb a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.single-page .page-breadcrumb a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Page Title */
.single-page .page-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
    margin: 0 0 var(--space-xl) 0;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .single-page .page-title {
        font-size: var(--font-size-2xl);
    }
}

/* Page Featured Image */
.single-page .page-featured-image {
    margin: var(--space-xl) 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid var(--color-border);
    position: relative;
    z-index: 1;
}

.single-page .page-featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Page Excerpt */
.single-page .page-excerpt {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    line-height: 1.7;
    margin: var(--space-lg) 0;
    padding: var(--space-lg);
    background: rgba(30, 58, 138, 0.05);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-style: italic;
    position: relative;
    z-index: 1;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

/* Page Content */
.single-page .page-content {
    padding: var(--space-2xl);
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-page .page-content p {
    margin: 0 0 var(--space-lg) 0;
}

.single-page .page-content h2,
.single-page .page-content h3,
.single-page .page-content h4,
.single-page .page-content h5,
.single-page .page-content h6 {
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
    font-weight: 700;
    color: var(--color-text);
    margin: var(--space-2xl) 0 var(--space-lg) 0;
    line-height: 1.4;
}

.single-page .page-content h2 {
    font-size: var(--font-size-2xl);
    border-bottom: 3px solid var(--color-primary);
    padding-bottom: var(--space-sm);
}

.single-page .page-content h3 {
    font-size: var(--font-size-xl);
    border-left: 4px solid var(--color-primary);
    padding-left: var(--space-md);
}

.single-page .page-content h4 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
}

.single-page .page-content blockquote {
    margin: var(--space-xl) 0;
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg-light);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-style: italic;
    position: relative;
}

.single-page .page-content blockquote::before {
    content: '"';
    font-size: var(--font-size-4xl);
    color: var(--color-primary);
    position: absolute;
    top: 0;
    left: var(--space-md);
    font-family: serif;
}

.single-page .page-content ul,
.single-page .page-content ol {
    margin: var(--space-lg) 0;
    padding-left: var(--space-xl);
}

.single-page .page-content li {
    margin-bottom: var(--space-sm);
}

.single-page .page-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border);
    margin: var(--space-lg) 0;
}

/* Page Links */
.single-page .page-links {
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    background: var(--color-bg-light);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: center;
}

.single-page .page-links-title {
    font-weight: 700;
    color: var(--color-text);
    margin-right: var(--space-md);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-page .page-links a {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    margin: 0 var(--space-xs);
    background: white;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-page .page-links a:hover {
    background: var(--color-primary);
    color: white;
}

/* Child Pages */
.child-pages {
    margin: var(--space-2xl) auto;
    max-width: 1000px;
    padding: var(--space-2xl);
    background: var(--color-bg-light);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.child-pages-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 var(--space-xl) 0;
    text-align: center;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.child-pages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.child-page-card {
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.child-page-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.child-page-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.child-page-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.child-page-card:hover .child-page-image img {
    transform: scale(1.05);
}

.child-page-content {
    padding: var(--space-lg);
}

.child-page-title {
    margin: 0 0 var(--space-sm) 0;
    font-size: var(--font-size-lg);
    line-height: 1.4;
    font-weight: 700;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.child-page-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.child-page-excerpt {
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.child-page-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all 0.3s ease;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.child-page-link:hover {
    color: var(--color-primary-dark);
    gap: var(--space-sm);
}

.child-page-link svg {
    transition: transform 0.3s ease;
}

.child-page-link:hover svg {
    transform: translateX(2px);
}

/* Page Footer */
.single-page .page-footer {
    padding: var(--space-xl) var(--space-2xl);
    border-top: 2px solid var(--color-border-light);
    background: var(--color-bg-light);
}

.single-page .page-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.single-page .page-updated {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-page .page-actions {
    display: flex;
    gap: var(--space-md);
}

.single-page .print-button,
.single-page .edit-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: white;
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all 0.3s ease;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.single-page .print-button:hover {
    background: var(--color-secondary);
    color: white;
    border-color: var(--color-secondary);
}

.single-page .edit-button:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Page Mobile Responsiveness */
@media (max-width: 768px) {
    .single-page {
        margin: 0 var(--space-md);
        border-radius: var(--radius-md);
    }
    
    .single-page .page-header-content,
    .single-page .page-content,
    .single-page .page-footer {
        padding: var(--space-lg);
    }
    
    .single-page .page-meta {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .child-pages-grid {
        grid-template-columns: 1fr;
    }
    
    .child-pages {
        padding: var(--space-lg);
    }
}

/* Single Article Mobile Responsiveness */
@media (max-width: 768px) {
    .single-article {
        margin: 0;
        border-radius: 0;
        border-left: none;
        border-right: none;
        box-shadow: none;
        overflow: visible;
    }
    
    /* Article Header - フルワイド */
    .single-article .article-header {
        margin-left: calc(-1 * var(--space-md));
        margin-right: calc(-1 * var(--space-md));
        border-radius: 0;
        padding: var(--space-lg) var(--space-md);
        border-bottom: 1px solid var(--color-border);
    }
    
    /* Article Content & Footer - 通常の余白 */
    .single-article .article-content {
        padding: var(--space-lg) var(--space-md);
        font-size: var(--font-size-base);
    }
    
    .single-article .article-footer {
        padding: var(--space-lg) var(--space-md);
        border-top: 1px solid var(--color-border-light);
    }
    
    /* ブレッドクラム */
    .single-article .article-breadcrumb ol {
        flex-wrap: wrap;
        gap: var(--space-xs);
        font-size: var(--font-size-xs);
    }
    
    .single-article .article-breadcrumb li {
        max-width: 150px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    
    /* タイトル */
    .single-article .article-title {
        font-size: var(--font-size-2xl);
        line-height: 1.3;
        margin: var(--space-lg) 0;
    }
    
    /* メタ情報 */
    .single-article .article-meta-top,
    .single-article .article-meta-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
    
    /* コンテンツ内の見出し調整 */
    .single-article .article-content h2 {
        font-size: var(--font-size-xl);
        margin: var(--space-xl) 0 var(--space-md) 0;
    }
    
    .single-article .article-content h3 {
        font-size: var(--font-size-lg);
        margin: var(--space-lg) 0 var(--space-sm) 0;
    }
    
    /* シェアボタン */
    .single-article .share-buttons {
        justify-content: flex-start;
        gap: var(--space-sm);
        flex-wrap: wrap;
    }
    
    .single-article .share-button {
        font-size: var(--font-size-xs);
        padding: var(--space-xs) var(--space-sm);
    }
    
    /* 関連記事 */
    .related-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .related-posts {
        margin: var(--space-lg) 0;
        padding: var(--space-md);
        border-radius: var(--radius-md);
    }
    
    /* ポストナビゲーション */
    .post-navigation {
        margin: var(--space-lg) 0;
    }
    
    .post-navigation .nav-links {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}

/* No Results */
.no-results {
    text-align: center;
    padding: var(--space-3xl) 0;
}

.no-results h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0 0 var(--space-md) 0;
    color: var(--color-text);
}

.suggestions {
    background: var(--color-bg-light);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    margin: var(--space-xl) 0;
    text-align: left;
}

.suggestions h3 {
    margin: 0 0 var(--space-lg) 0;
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
}

.category-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.category-list a {
    display: block;
    padding: var(--space-md);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    text-decoration: none;
    transition: all 0.2s ease;
}

.category-list a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

/* Footer */
.site-footer {
    background: var(--color-bg-dark);
    color: white;
    padding: var(--space-3xl) 0 var(--space-xl) 0;
    margin-top: var(--space-3xl);
    border-top: 3px solid var(--color-primary);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-section {
    
}

.footer-title {
    margin: 0 0 var(--space-lg) 0;
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: white;
    font-family: 'Times New Roman', 'Noto Serif JP', serif;
}

.footer-description {
    color: #cbd5e1;
    line-height: 1.6;
    margin: 0;
}

.footer-menu,
.footer-categories {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-menu li,
.footer-categories li {
    margin-bottom: var(--space-sm);
}

.footer-menu a,
.footer-categories a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-menu a:hover,
.footer-categories a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: var(--space-xl);
    text-align: center;
}

.copyright {
    color: #a0aec0;
    font-size: var(--font-size-sm);
    margin: 0;
}

.copyright a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.2s ease;
}

.copyright a:hover {
    color: white;
}

/* Utilities */
.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    position: absolute !important;
    height: 1px;
    width: 1px;
    overflow: hidden;
}

/* Progressive enhancement */
.no-js .menu-toggle {
    display: none;
}

.no-js .primary-menu {
    display: flex !important;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .site-main {
        padding: 0 0 var(--space-xl) 0;
    }
    
    .hero-section {
        padding: var(--space-lg) 0;
        margin-bottom: var(--space-lg);
        margin-left: calc(-1 * var(--space-md));
        margin-right: calc(-1 * var(--space-md));
        border-radius: 0;
    }
    
    .hero-content {
        padding: 0 var(--space-lg);
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .article-card .article-content {
        padding: var(--space-lg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .single-article .article-header {
        margin-left: calc(-1 * var(--space-md));
        margin-right: calc(-1 * var(--space-md));
        padding: var(--space-md) var(--space-md);
    }
    
    .top-nav-content {
        min-height: 60px;
        gap: var(--space-sm);
    }
    
    .site-title {
        font-size: var(--font-size-lg);
    }
    
    .hero-section {
        padding: var(--space-md) 0;
        margin-bottom: var(--space-md);
        margin-left: calc(-1 * var(--space-md));
        margin-right: calc(-1 * var(--space-md));
        border-radius: 0;
    }
    
    .hero-content {
        padding: 0 var(--space-md);
    }
    
    .hero-title {
        font-size: var(--font-size-xl);
        margin-bottom: var(--space-md);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .articles-grid {
        gap: var(--space-md);
    }
    
    .article-card .article-content {
        padding: var(--space-md);
    }
    
    .article-card .article-footer {
        flex-direction: column;
        gap: var(--space-md);
        align-items: flex-start;
    }
    
    .pagination-nav {
        padding: var(--space-md) 0;
    }
    
    .pagination-nav .nav-links {
        gap: var(--space-xs);
    }
    
    .page-numbers a,
    .page-numbers span {
        min-width: 40px;
        min-height: 40px;
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--font-size-sm);
    }
    
    /* Single Article 480px - より小さな画面向け調整 */
    .single-article .article-content {
        padding: var(--space-md) var(--space-md);
        font-size: var(--font-size-sm);
    }
    
    .single-article .article-footer {
        padding: var(--space-md) var(--space-md);
    }
    
    /* より小さな要素調整 */
    .single-article .article-breadcrumb ol {
        font-size: var(--font-size-xs);
        gap: var(--space-xs);
    }
    
    .single-article .article-breadcrumb li {
        max-width: 100px;
    }
    
    .single-article .article-title {
        font-size: var(--font-size-xl);
        line-height: 1.3;
        margin: var(--space-md) 0;
    }
    
    .single-article .article-content h2 {
        font-size: var(--font-size-lg);
        margin: var(--space-lg) 0 var(--space-sm) 0;
    }
    
    .single-article .article-content h3 {
        font-size: var(--font-size-base);
        margin: var(--space-md) 0 var(--space-xs) 0;
    }
    
    .single-article .share-button {
        font-size: var(--font-size-xs);
        padding: var(--space-xs) var(--space-xs);
        gap: var(--space-xs);
    }
    
    .related-posts,
    .child-pages {
        padding: var(--space-md);
        margin: var(--space-md) 0;
    }
}