/* ============================================
   Accident Media Theme - Main Stylesheet
   ============================================ */

/* --- CSS Variables --- */
:root {
    --color-main: #1B365D;
    --color-main-light: #2a4f8a;
    --color-main-dark: #122540;
    --color-accent: #D4AF37;
    --color-cta: #E8620A;
    --color-cta-hover: #c95308;
    --color-line: #06C755;
    --color-white: #FFFFFF;
    --color-light-gray: #F8F9FA;
    --color-gray: #e9ecef;
    --color-border: #dee2e6;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;

    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.8;

    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;

    --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);

    --transition: 0.2s ease;

    --container-max: 1200px;
    --sidebar-width: 320px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: var(--font-size-base); scroll-behavior: smooth; }

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: var(--line-height-base);
    -webkit-font-smoothing: antialiased;
    overflow-wrap: anywhere;
    word-break: break-word;
}

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

a { color: var(--color-main); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-main-light); }

ul, ol { list-style: none; }

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   Header
   ============================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    border-bottom: 3px solid var(--color-main);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 16px;
}

.site-header__logo-text {
    font-size: clamp(1rem, 4vw, 1.25rem);
    font-weight: 700;
    color: var(--color-main);
    white-space: normal;
    line-height: 1.3;
    display: block;
}

.site-header__logo img { height: 40px; width: auto; }

.site-header__nav { display: none; }

.site-header__menu {
    display: flex;
    gap: 4px;
    align-items: center;
}

.site-header__menu li a {
    display: block;
    padding: 8px 12px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition), color var(--transition);
}

.site-header__menu li a:hover {
    background-color: var(--color-light-gray);
    color: var(--color-main);
}

.site-header__actions { display: flex; align-items: center; gap: 8px; }

.site-header__search-btn,
.site-header__hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--color-text);
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.site-header__search-btn:hover,
.site-header__hamburger:hover { background-color: var(--color-light-gray); }

.site-header__hamburger {
    flex-direction: column;
    gap: 4px;
    width: 36px;
    height: 36px;
}

.site-header__hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.site-header__search-bar {
    background-color: var(--color-light-gray);
    padding: 12px 0;
    border-top: 1px solid var(--color-border);
}

.site-header__search-bar form {
    display: flex;
    gap: 8px;
}

.site-header__search-bar input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 0.9375rem;
    font-family: var(--font-family);
    outline: none;
    transition: border-color var(--transition);
}

.site-header__search-bar input:focus { border-color: var(--color-main); }

.site-header__search-bar button {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background-color: var(--color-main);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.9375rem;
    font-family: var(--font-family);
    cursor: pointer;
    transition: background-color var(--transition);
}

.site-header__search-bar button:hover { background-color: var(--color-main-light); }

/* Mobile Nav */
.mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 200;
}

.mobile-nav-overlay.is-open { display: block; }

.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100%;
    background-color: var(--color-white);
    z-index: 300;
    overflow-y: auto;
    transition: right 0.3s ease;
    padding: 20px;
}

.mobile-nav.is-open { right: 0; }

.mobile-nav__close {
    display: block;
    margin-left: auto;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--color-text);
    line-height: 1;
    padding: 4px 8px;
}

.mobile-nav__menu { margin-top: 16px; }

.mobile-nav__menu li { border-bottom: 1px solid var(--color-border); }

.mobile-nav__menu li a {
    display: block;
    padding: 14px 8px;
    font-size: 0.9375rem;
    color: var(--color-text);
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    background: linear-gradient(135deg, var(--color-main) 0%, var(--color-main-light) 60%, #3a6bba 100%);
    padding: 60px 0;
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50%;
    pointer-events: none;
}

.hero-section__content { max-width: 700px; }

.hero-section__title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 16px;
}

.hero-section__title-accent { color: var(--color-accent); }

.hero-section__subtitle {
    font-size: clamp(0.9375rem, 2vw, 1.0625rem);
    line-height: 1.7;
    opacity: 0.9;
    margin-bottom: 32px;
}

.hero-section__search {
    display: flex;
    gap: 0;
    max-width: 600px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-section__search input {
    flex: 1;
    padding: 14px 20px;
    border: none;
    font-size: 0.9375rem;
    font-family: var(--font-family);
    outline: none;
    color: var(--color-text);
}

.hero-section__search button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background-color: var(--color-cta);
    color: var(--color-white);
    border: none;
    font-size: 0.9375rem;
    font-weight: 700;
    font-family: var(--font-family);
    cursor: pointer;
    white-space: nowrap;
    transition: background-color var(--transition);
}

.hero-section__search button:hover { background-color: var(--color-cta-hover); }

/* ============================================
   Category Nav
   ============================================ */
.category-nav-section {
    background-color: var(--color-main-dark);
    padding: 0;
}

.category-nav {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.category-nav::-webkit-scrollbar { display: none; }

.category-nav__item {
    display: block;
    padding: 14px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    white-space: nowrap;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    transition: background-color var(--transition), color var(--transition);
}

.category-nav__item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
}

/* ============================================
   Section Header
   ============================================ */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-main);
}

.section-header__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-header__icon { font-style: normal; }

/* ============================================
   Featured Section
   ============================================ */
.featured-section { padding: 48px 0; background-color: var(--color-light-gray); }

.featured-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

/* ============================================
   Article Card
   ============================================ */
.article-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.article-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.article-card__link { display: block; color: inherit; }
.article-card__link:hover { color: inherit; }

.article-card__thumbnail {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background-color: var(--color-gray);
}

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

.article-card:hover .article-card__thumbnail img { transform: scale(1.03); }

.article-card__no-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-main) 0%, var(--color-main-light) 100%);
}

.article-card__category {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: var(--color-main);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 20px;
}

.article-card__body { padding: 16px; }

.article-card__title {
    font-size: 0.9375rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card--large .article-card__title {
    font-size: 1.125rem;
    -webkit-line-clamp: 2;
}

.article-card__date {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* ============================================
   Category Articles Section
   ============================================ */
.category-articles-section { padding: 48px 0; }

.category-tabs {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0;
}

.category-tabs::-webkit-scrollbar { display: none; }

.category-tabs__tab {
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--font-family);
    color: var(--color-text-light);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    margin-bottom: -2px;
    transition: color var(--transition), border-color var(--transition);
}

.category-tabs__tab:hover { color: var(--color-main); }

.category-tabs__tab.is-active {
    color: var(--color-main);
    border-bottom-color: var(--color-main);
    font-weight: 700;
}

.category-panel { display: none; }
.category-panel.is-active { display: block; }

/* Article List */
.article-list { display: grid; grid-template-columns: 1fr; gap: 16px; }

.article-list__item {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.article-list__item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.article-list__link {
    display: flex;
    gap: 16px;
    padding: 16px;
    color: inherit;
}

.article-list__link:hover { color: inherit; }

.article-list__thumbnail {
    flex-shrink: 0;
    width: 120px;
    height: 80px;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    background-color: var(--color-gray);
}

.article-list__thumbnail img { width: 100%; height: 100%; object-fit: cover; }

.article-list__no-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-main) 0%, var(--color-main-light) 100%);
}

.article-list__body { flex: 1; min-width: 0; }

.article-list__title {
    font-size: 0.9375rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-list__date {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.article-list__excerpt {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.category-panel__more { margin-top: 24px; text-align: center; }

.btn-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 28px;
    border: 2px solid var(--color-main);
    border-radius: 30px;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-main);
    transition: background-color var(--transition), color var(--transition);
}

.btn-more:hover {
    background-color: var(--color-main);
    color: var(--color-white);
}

/* ============================================
   Ranking Section
   ============================================ */
.ranking-section { padding: 48px 0; background-color: var(--color-light-gray); }

.ranking-list { display: grid; grid-template-columns: 1fr; gap: 12px; }

.ranking-list__item {
    display: flex;
    align-items: center;
    gap: 12px;
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    padding: 12px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.ranking-list__item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.ranking-list__rank {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-white);
    background-color: var(--color-text-muted);
}

.ranking-list__rank--1 { background-color: #D4AF37; }
.ranking-list__rank--2 { background-color: #9E9E9E; }
.ranking-list__rank--3 { background-color: #CD7F32; }

.ranking-list__link {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    color: inherit;
}

.ranking-list__link:hover { color: inherit; }

.ranking-list__thumbnail {
    flex-shrink: 0;
    width: 80px;
    height: 54px;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    background-color: var(--color-gray);
}

.ranking-list__thumbnail img { width: 100%; height: 100%; object-fit: cover; }

.ranking-list__no-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-main) 0%, var(--color-main-light) 100%);
}

.ranking-list__title {
    font-size: 0.9375rem;
    font-weight: 700;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ranking-list__date {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* ============================================
   Ad Slot
   ============================================ */
.ad-slot {
    min-height: 100px;
    background-color: var(--color-light-gray);
    border: 1px dashed var(--color-border);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.ad-loading {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* ============================================
   Single Article
   ============================================ */
.single-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    padding-top: 32px;
    padding-bottom: 64px;
}

/* Breadcrumb */
.breadcrumb { margin-bottom: 24px; }

.breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.breadcrumb__item a { color: var(--color-text-light); }
.breadcrumb__item a:hover { color: var(--color-main); }
.breadcrumb__separator { color: var(--color-text-muted); }
.breadcrumb__current { color: var(--color-text-muted); }

/* Article Header */
.single-article__categories {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.single-article__category-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--color-main);
    color: var(--color-white);
    font-size: 0.8125rem;
    font-weight: 700;
    border-radius: 20px;
    transition: background-color var(--transition);
}

.single-article__category-badge:hover {
    background-color: var(--color-main-light);
    color: var(--color-white);
}

.single-article__title {
    font-size: clamp(1.375rem, 3vw, 1.875rem);
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 16px;
    color: var(--color-main-dark);
    overflow-wrap: anywhere;
    word-break: break-word;
}

.single-article__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.single-article__date,
.single-article__modified {
    display: flex;
    align-items: center;
    gap: 4px;
}

.single-article__thumbnail {
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 32px;
    aspect-ratio: 16 / 9;
}

.single-article__thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Table of Contents */
.table-of-contents {
    background-color: var(--color-light-gray);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-main);
    border-radius: var(--border-radius);
    padding: 16px;
    margin-bottom: 32px;
}

.table-of-contents__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.table-of-contents__title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-main);
}

.table-of-contents__toggle {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    padding: 4px 10px;
    font-size: 0.8125rem;
    font-family: var(--font-family);
    cursor: pointer;
    color: var(--color-text-light);
    transition: background-color var(--transition);
}

.table-of-contents__toggle:hover { background-color: var(--color-gray); }

.table-of-contents__list { counter-reset: toc-counter; }

.table-of-contents__list li {
    counter-increment: toc-counter;
    padding: 4px 0;
    border-bottom: 1px dotted var(--color-border);
}

.table-of-contents__list li:last-child { border-bottom: none; }

.table-of-contents__list a {
    font-size: 0.9375rem;
    color: var(--color-text);
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.table-of-contents__list a::before {
    content: counter(toc-counter) ".";
    font-weight: 700;
    color: var(--color-main);
    flex-shrink: 0;
}

.table-of-contents__list a:hover { color: var(--color-main); }

/* Entry Content */
.entry-content {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-text);
}

.entry-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    background-color: var(--color-main);
    padding: 12px 20px;
    border-radius: var(--border-radius-sm);
    margin: 40px 0 20px;
}

.entry-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-main);
    border-left: 4px solid var(--color-main);
    padding-left: 12px;
    margin: 32px 0 16px;
}

.entry-content h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--color-main-dark);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 6px;
    margin: 24px 0 12px;
}

.entry-content p { margin-bottom: 20px; }

.entry-content ul,
.entry-content ol {
    margin: 16px 0 20px 20px;
}

.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }

.entry-content li { margin-bottom: 8px; }

.entry-content blockquote {
    background-color: var(--color-light-gray);
    border-left: 4px solid var(--color-accent);
    padding: 16px 20px;
    margin: 24px 0;
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
    font-style: italic;
    color: var(--color-text-light);
}

.entry-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.9375rem;
}

.entry-content th {
    background-color: var(--color-main);
    color: var(--color-white);
    padding: 10px 14px;
    text-align: left;
    font-weight: 700;
}

.entry-content td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-border);
}

.entry-content tr:nth-child(even) td { background-color: var(--color-light-gray); }

.entry-content img,
.entry-content video,
.entry-content iframe {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: 16px 0;
}

.entry-content pre,
.entry-content code {
    white-space: pre-wrap;
    word-break: break-all;
    max-width: 100%;
    overflow-x: auto;
}

.entry-content a {
    color: var(--color-main);
    text-decoration: underline;
}

/* ============================================
   Author Profile
   ============================================ */
.author-profile-section {
    background-color: var(--color-light-gray);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 16px;
    margin: 40px 0;
}

.author-profile-section__title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-main);
}

.author-profile {
    position: relative;
    padding: 16px;
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    margin-bottom: 16px;
}

.author-profile:last-child { margin-bottom: 0; }

.author-profile__badge {
    display: inline-block;
    padding: 3px 10px;
    background-color: var(--color-main);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 4px;
    margin-bottom: 12px;
}

.author-profile__badge--writer { background-color: var(--color-accent); color: var(--color-main-dark); }

.author-profile__inner { 
    display: flex; 
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px; 
}

.author-profile__avatar {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    overflow: hidden;
    background-color: var(--color-gray);
    display: flex;
    align-items: center;
    justify-content: center;
}

.author-profile__img { width: 100%; height: 100%; object-fit: cover; }

.author-profile__img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-gray);
}

.author-profile__name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: 4px;
}

.author-profile__name a { color: var(--color-main); text-decoration: underline; }

.author-profile__title {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.author-profile__bio {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--color-text);
}

/* ============================================
   Related Articles
   ============================================ */
.related-articles { margin: 40px 0; }

.related-articles__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-main);
}

.related-articles__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

/* ============================================
   Sidebar
   ============================================ */
.sidebar-ad { min-height: 250px; }

.sidebar-cta {
    background: linear-gradient(135deg, var(--color-main) 0%, var(--color-main-light) 100%);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    color: var(--color-white);
}

.sidebar-cta__title {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.sidebar-cta__text {
    font-size: 0.875rem;
    line-height: 1.7;
    opacity: 0.9;
    margin-bottom: 16px;
}

.sidebar-cta__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-size: 0.9375rem;
    font-weight: 700;
    margin-bottom: 10px;
    transition: opacity var(--transition);
}

.sidebar-cta__btn:hover { opacity: 0.9; }

.sidebar-cta__btn--phone {
    background-color: var(--color-cta);
    color: var(--color-white);
}

.sidebar-cta__btn--line {
    background-color: var(--color-line);
    color: var(--color-white);
}

.sidebar-widget {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 24px;
}

.sidebar-widget__title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-main);
}

.sidebar-widget__category-list li {
    border-bottom: 1px solid var(--color-border);
}

.sidebar-widget__category-list li:last-child { border-bottom: none; }

.sidebar-widget__category-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 4px;
    font-size: 0.9375rem;
    color: var(--color-text);
    transition: color var(--transition);
}

.sidebar-widget__category-list a:hover { color: var(--color-main); }

.sidebar-widget__count {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    background-color: var(--color-light-gray);
    padding: 2px 8px;
    border-radius: 20px;
}

.sidebar-widget__ranking { counter-reset: sidebar-rank; }

.sidebar-widget__ranking-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
}

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

.sidebar-widget__rank {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-white);
    background-color: var(--color-text-muted);
}

.sidebar-widget__rank--1 { background-color: #D4AF37; }
.sidebar-widget__rank--2 { background-color: #9E9E9E; }
.sidebar-widget__rank--3 { background-color: #CD7F32; }

.sidebar-widget__ranking-link {
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sidebar-widget__ranking-link:hover { color: var(--color-main); }

/* ============================================
   Sticky Action Bar
   ============================================ */
.sticky-action-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background-color: var(--color-main-dark);
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.2);
    padding: 10px 0;
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.sticky-action-bar.is-hidden { transform: translateY(100%); }

.sticky-action-bar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
    gap: 12px;
}

.sticky-action-bar__label {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.8);
    white-space: nowrap;
    display: none;
}

.sticky-action-bar__buttons {
    display: flex;
    gap: 10px;
    flex: 1;
    justify-content: center;
}

.sticky-action-bar__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-white);
    flex: 1;
    max-width: 200px;
    transition: opacity var(--transition);
}

.sticky-action-bar__btn:hover { opacity: 0.9; color: var(--color-white); }

.sticky-action-bar__btn--phone { background-color: var(--color-cta); }
.sticky-action-bar__btn--line { background-color: var(--color-line); }

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background-color: var(--color-main-dark);
    color: rgba(255, 255, 255, 0.8);
    margin-top: 64px;
}

.site-footer__top { padding: 48px 0; }

.site-footer__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.site-footer__site-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 12px;
}

.site-footer__description {
    font-size: 0.875rem;
    line-height: 1.7;
    opacity: 0.8;
}

.site-footer__heading {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 16px;
}

.site-footer__menu { display: flex; flex-direction: column; gap: 8px; }

.site-footer__menu a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition);
}

.site-footer__menu a:hover { color: var(--color-white); }

.site-footer__info-text {
    font-size: 0.875rem;
    line-height: 1.7;
    opacity: 0.8;
    margin-bottom: 16px;
}

.site-footer__contact-btn {
    display: inline-block;
    padding: 10px 24px;
    background-color: var(--color-cta);
    color: var(--color-white);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 700;
    transition: opacity var(--transition);
}

.site-footer__contact-btn:hover { opacity: 0.9; color: var(--color-white); }

.site-footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
}

.site-footer__legal-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 12px;
}

.site-footer__legal-nav a {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition);
}

.site-footer__legal-nav a:hover { color: var(--color-white); }

.site-footer__copyright {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   Archive Page
   ============================================ */
.archive-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    padding-top: 32px;
    padding-bottom: 64px;
}

.archive-header { margin-bottom: 32px; }

.archive-header__title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: 8px;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.archive-header__description {
    font-size: 0.9375rem;
    color: var(--color-text-light);
}

/* Pagination */
.nav-links {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.page-numbers {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    color: var(--color-text);
    transition: background-color var(--transition), color var(--transition);
}

.page-numbers:hover,
.page-numbers.current {
    background-color: var(--color-main);
    color: var(--color-white);
    border-color: var(--color-main);
}

/* ============================================
   Responsive - Tablet (768px+)
   ============================================ */
@media (min-width: 768px) {
    .site-header__nav { display: block; }
    .site-header__hamburger { display: none; }

    .featured-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .article-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .article-list__link { flex-direction: column; padding: 0; }
    .article-list__thumbnail { width: 100%; height: 160px; }
    .article-list__body { padding: 16px; }

    .ranking-list { grid-template-columns: repeat(2, 1fr); }

    .table-of-contents { padding: 20px 24px; }

    .author-profile-section { padding: 28px; }
    .author-profile { padding: 20px; }
    .author-profile__inner {
        flex-direction: row;
        align-items: flex-start;
        text-align: left;
        gap: 16px;
    }
    .author-profile__avatar {
        width: 80px;
        height: 80px;
    }

    .site-footer__grid { grid-template-columns: repeat(2, 1fr); }

    .sticky-action-bar__label { display: block; }

    .single-container {
        grid-template-columns: 1fr var(--sidebar-width);
    }

    .archive-container {
        grid-template-columns: 1fr var(--sidebar-width);
    }

    .related-articles__grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================
   Responsive - Desktop (1024px+)
   ============================================ */
@media (min-width: 1024px) {
    .featured-grid {
        grid-template-columns: 2fr 1fr 1fr;
    }

    .featured-grid .article-card--large {
        grid-row: span 2;
    }

    .article-list { grid-template-columns: repeat(2, 1fr); }

    .ranking-list { grid-template-columns: 1fr; }

    .site-footer__grid { grid-template-columns: 2fr 1fr 1fr; }

    .sticky-action-bar__btn { max-width: 240px; }
}

/* ============================================
   Accessibility
   ============================================ */
:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Print */
@media print {
    .site-header,
    .sticky-action-bar,
    .site-footer,
    .sidebar-cta,
    .ad-slot { display: none !important; }
}