/* ===========================
   仁王3攻略ページ - メインスタイル
   =========================== */

/* リセット & ベース設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* カラーパレット */
    --color-primary: #d4af37;
    --color-secondary: #c41e3a;
    --color-dark: #0a0a0a;
    --color-dark-2: #1a1a1a;
    --color-dark-3: #2d2d2d;
    --color-dark-4: #3a3a3a;
    --color-light: #ffffff;
    --color-gray: #cccccc;
    --color-gray-dark: #888888;
    
    /* 和風アクセント */
    --color-red: #c41e3a;
    --color-gold: #d4af37;
    --color-blue: #4a90e2;
    
    /* タイポグラフィ */
    --font-main: 'Noto Sans JP', sans-serif;
    --font-accent: 'Cinzel', serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* シャドウ */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    --shadow-gold: 0 0 20px rgba(212, 175, 55, 0.3);
    
    /* トランジション */
    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-dark);
    color: var(--color-light);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

/* ===========================
   ヘッダー
   =========================== */

.header {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-2) 100%);
    border-bottom: 2px solid var(--color-gold);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo i {
    font-size: 2rem;
    color: var(--color-gold);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--color-gray);
    margin-left: var(--spacing-xs);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.main-nav a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    background-color: var(--color-dark-3);
    color: var(--color-gold);
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-gold);
}

/* ===========================
   パンくずリスト
   =========================== */

.breadcrumb {
    background-color: var(--color-dark-2);
    padding: var(--spacing-sm) 0;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--color-dark-3);
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.breadcrumb a {
    color: var(--color-gray);
}

.breadcrumb a:hover {
    color: var(--color-gold);
}

.breadcrumb i {
    font-size: 0.7rem;
    color: var(--color-gray-dark);
}

/* ===========================
   ヒーローセクション
   =========================== */

.hero {
    position: relative;
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-dark-2) 0%, var(--color-dark) 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../nioh1/images/hero-background.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
}

.hero-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, var(--color-dark-1) 100%);
}

.hero-pattern {
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(212, 175, 55, 0.1) 35px, rgba(212, 175, 55, 0.1) 70px),
        repeating-linear-gradient(-45deg, transparent, transparent 35px, rgba(196, 30, 58, 0.1) 35px, rgba(196, 30, 58, 0.1) 70px);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: linear-gradient(135deg, var(--color-red) 0%, var(--color-gold) 100%);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-gold);
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.title-main {
    display: block;
    font-family: var(--font-accent);
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-light) 50%, var(--color-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(212, 175, 55, 0.5);
    letter-spacing: 0.1em;
}

.title-sub {
    display: block;
    font-size: 1.5rem;
    color: var(--color-gray);
    margin-top: var(--spacing-sm);
}

.demo-info {
    background: rgba(212, 175, 55, 0.1);
    border: 2px solid var(--color-gold);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin: var(--spacing-lg) auto;
    max-width: 500px;
}

.demo-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-xs);
}

.demo-date {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gold);
}

.countdown {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.countdown-item {
    background: var(--color-dark-3);
    border: 2px solid var(--color-gold);
    border-radius: 8px;
    padding: var(--spacing-md);
    min-width: 80px;
    text-align: center;
}

.countdown-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gold);
}

.countdown-label {
    display: block;
    font-size: 0.9rem;
    color: var(--color-gray);
    margin-top: var(--spacing-xs);
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* ===========================
   ボタン
   =========================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-gold) 0%, #b8941e 100%);
    color: var(--color-dark);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #e6c54a 0%, var(--color-gold) 100%);
    box-shadow: var(--shadow-gold);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--color-dark-3);
    color: var(--color-light);
    border: 2px solid var(--color-gold);
}

.btn-secondary:hover {
    background: var(--color-gold);
    color: var(--color-dark);
}

.btn-youtube {
    background: #ff0000;
    color: var(--color-light);
    width: 100%;
    justify-content: center;
}

.btn-youtube:hover {
    background: #cc0000;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
}

/* ===========================
   著作権表示エリア
   =========================== */

.copyright-notice {
    background: linear-gradient(135deg, var(--color-dark-2) 0%, var(--color-dark-3) 100%);
    border-top: 1px solid var(--color-dark-3);
    border-bottom: 1px solid var(--color-dark-3);
    padding: var(--spacing-md) 0;
}

.copyright-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    padding: var(--spacing-md);
    border-radius: 8px;
    border-left: 4px solid var(--color-gold);
}

.copyright-content i {
    font-size: 1.5rem;
    color: var(--color-gold);
    flex-shrink: 0;
}

.copyright-content p {
    margin: 0;
    color: var(--color-gray);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* ===========================
   コンテンツナビゲーション
   =========================== */

.content-nav {
    background-color: var(--color-dark-2);
    border-bottom: 2px solid var(--color-dark-3);
    position: sticky;
    top: 76px;
    z-index: 999;
}

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

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

.nav-tab {
    flex: 1;
    text-align: center;
    white-space: nowrap;
    min-width: 150px;
}

.nav-tab a {
    display: block;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
    color: inherit;
    text-decoration: none;
}

.nav-tab i {
    display: block;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.nav-tab a:hover {
    background-color: var(--color-dark-3);
    color: var(--color-gold);
}

.nav-tab a.active,
.nav-tab a:focus {
    background-color: var(--color-dark-3);
    color: var(--color-gold);
    border-bottom-color: var(--color-gold);
}

/* ===========================
   メインコンテンツ
   =========================== */

.main-content {
    padding: var(--spacing-xl) 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-lg);
    align-items: start;
}

/* ===========================
   サイドバー
   =========================== */

.sidebar {
    position: sticky;
    top: 160px;
}

.widget {
    background: var(--color-dark-2);
    border: 1px solid var(--color-dark-3);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.widget-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-gold);
    color: var(--color-gold);
}

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

.quick-nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    border-radius: 4px;
    transition: var(--transition);
}

.quick-nav-item:hover {
    background-color: var(--color-dark-3);
    color: var(--color-gold);
    padding-left: var(--spacing-md);
}

.quick-nav-item i {
    font-size: 0.8rem;
}

.video-embed {
    aspect-ratio: 16 / 9;
    background-color: var(--color-dark-3);
    border-radius: 8px;
    overflow: hidden;
}

.video-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-gray-dark);
    text-align: center;
    padding: var(--spacing-md);
}

.video-placeholder i {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.channel-card {
    display: flex;
    gap: var(--spacing-md);
}

.channel-avatar {
    flex-shrink: 0;
}

.channel-avatar i {
    font-size: 3rem;
    color: var(--color-gold);
}

.channel-details h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.subscriber-count {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-lg);
    border-left: 2px solid var(--color-gold);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 0;
    width: 10px;
    height: 10px;
    background-color: var(--color-gold);
    border-radius: 50%;
}

.timeline-item.future {
    border-left-color: var(--color-gray-dark);
}

.timeline-item.future::before {
    background-color: var(--color-gray-dark);
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--color-gold);
    margin-bottom: var(--spacing-xs);
}

.timeline-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-gray);
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.stat-item {
    background-color: var(--color-dark-3);
    border-radius: 8px;
    padding: var(--spacing-md);
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gold);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-gray);
    margin-top: var(--spacing-xs);
}

.ad-card {
    display: flex;
    gap: var(--spacing-sm);
    background-color: var(--color-dark-3);
    border-radius: 8px;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.ad-image {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-dark-3) 0%, var(--color-dark-4) 100%);
    border-radius: 8px;
}

.ad-image i {
    font-size: 1.5rem;
    color: var(--color-gold);
}

.ad-content h4 {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.ad-content p {
    font-size: 0.8rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
}

/* ===========================
   メインコンテンツエリア
   =========================== */

.content-main {
    min-height: 600px;
}

/* コンテンツセクション - 常に表示 */
.content-section {
    display: block;
    margin-bottom: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    scroll-margin-top: 150px; /* スティッキーヘッダーの高さ分オフセット */
}

.content-section:not(:last-child) {
    border-bottom: 2px solid var(--color-dark-3);
    padding-bottom: var(--spacing-xl);
}

/* 旧タブコンテンツのスタイルを削除 */
/* .tab-content は使用しない */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gold);
}

.section-description {
    color: var(--color-gray);
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.article-card {
    position: relative;
    background: var(--color-dark-2);
    border: 1px solid var(--color-dark-3);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-gold);
}

.article-card.featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 300px 1fr;
}

.card-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-red) 0%, var(--color-gold) 100%);
    color: var(--color-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 1;
}

.card-badge.coming-soon {
    background: var(--color-gray-dark);
}

.card-image {
    aspect-ratio: 16 / 9;
    background: var(--color-dark-3);
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.article-card.featured .card-image {
    aspect-ratio: auto;
    height: 100%;
}

.placeholder-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-dark-3) 0%, var(--color-dark-4) 100%);
}

.placeholder-image i {
    font-size: 3rem;
    color: var(--color-gray-dark);
}

.card-content {
    padding: var(--spacing-md);
}

.card-title {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-light);
}

.card-description {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.card-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.85rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-gray-dark);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-gold);
    font-weight: 600;
    transition: var(--transition);
}

.card-link:hover {
    gap: var(--spacing-sm);
}

.card-link.disabled {
    color: var(--color-gray-dark);
    cursor: not-allowed;
}

/* ボス攻略カード専用スタイル */
.boss-info {
    margin: var(--spacing-md) 0;
}

.boss-meta {
    margin-bottom: var(--spacing-sm);
}

.difficulty {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--color-gold);
    font-size: 0.9rem;
}

.difficulty i {
    font-size: 0.85rem;
}

.boss-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-gray);
    font-size: 0.9rem;
}

.stat-item i {
    color: var(--color-gold);
    width: 16px;
    text-align: center;
}

.boss-tips {
    background: var(--color-dark-3);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin: var(--spacing-md) 0;
}

.boss-tips h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-gold);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.boss-tips ul {
    list-style: none;
    padding-left: 0;
}

.boss-tips li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray);
    line-height: 1.6;
}

.boss-tips li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--color-gold);
}

/* ===========================
   章セクション & シンプルボスカード
   =========================== */

.chapter-section {
    margin-bottom: var(--spacing-xl);
}

.chapter-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    color: var(--color-gold);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-gold);
}

.chapter-title i {
    font-size: 1.3rem;
}

.boss-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

.boss-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.boss-card-link.disabled {
    pointer-events: none;
    cursor: not-allowed;
}

.boss-card {
    background: var(--color-dark-2);
    border: 2px solid var(--color-dark-3);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.boss-card-link:hover .boss-card {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px rgba(212, 175, 55, 0.3);
    border-color: var(--color-gold);
}

.boss-card.featured {
    border-color: var(--color-gold);
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.2);
}

.boss-card.coming-soon {
    opacity: 0.5;
}

.boss-thumbnail {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    background: linear-gradient(135deg, var(--color-dark-3) 0%, var(--color-dark-2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.boss-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.boss-card-link:hover .boss-image {
    transform: scale(1.1);
}

.boss-image-placeholder {
    font-size: 4rem;
    color: var(--color-gold);
    opacity: 0.3;
}

.boss-card.coming-soon .boss-image-placeholder {
    color: var(--color-gray-dark);
}

.boss-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--color-gold);
    color: var(--color-dark);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
}

.boss-name {
    padding: var(--spacing-md);
    text-align: center;
    background: var(--color-dark-3);
}

.boss-name h4 {
    font-size: 1.1rem;
    color: var(--color-light);
    margin: 0;
    font-weight: 600;
}

.coming-soon-label {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.8rem;
    color: var(--color-gray-dark);
}

.coming-soon-message {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-dark-2);
    border: 2px dashed var(--color-dark-3);
    border-radius: 8px;
}

.coming-soon-message i {
    font-size: 4rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
}

.coming-soon-message h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray);
}

.coming-soon-message p {
    color: var(--color-gray-dark);
}

/* ===========================
   フッター
   =========================== */

.footer {
    background: var(--color-dark-2);
    border-top: 2px solid var(--color-gold);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

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

.footer-section h4 {
    color: var(--color-gold);
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: var(--color-gray);
    line-height: 1.6;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

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

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

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: 4px;
    transition: var(--transition);
}

.social-link.youtube {
    background-color: #ff0000;
}

.social-link.twitter {
    background-color: #1da1f2;
}

.social-link:hover {
    opacity: 0.8;
    transform: translateX(4px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-dark-3);
    color: var(--color-gray-dark);
    font-size: 0.9rem;
}

.disclaimer {
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
}

/* ===========================
   スクロールトップボタン
   =========================== */

.scroll-top-btn {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-gold) 0%, #b8941e 100%);
    color: var(--color-dark);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    background: linear-gradient(135deg, #e6c54a 0%, var(--color-gold) 100%);
    box-shadow: var(--shadow-gold);
    transform: translateY(-4px);
}

/* ===========================
   チャンネル情報セクション（メインコンテンツ内）
   =========================== */

.channel-info-section {
    margin-top: var(--spacing-xl);
}

.channel-info-section .channel-card {
    background: var(--color-dark-2);
    border: 2px solid var(--color-dark-3);
    border-radius: 8px;
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    max-width: 600px;
    margin: 0 auto;
    transition: var(--transition);
}

.channel-info-section .channel-card:hover {
    border-color: var(--color-gold);
    box-shadow: var(--shadow-lg);
}

.channel-info-section .channel-avatar {
    flex-shrink: 0;
}

.channel-info-section .channel-avatar i {
    font-size: 4rem;
    color: var(--color-gold);
}

.channel-info-section .channel-details {
    flex: 1;
}

.channel-info-section .channel-details h4 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-light);
}

.channel-info-section .subscriber-count {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

.channel-info-section .btn-youtube {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, #ff0000 0%, #cc0000 100%);
    color: var(--color-light);
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}

.channel-info-section .btn-youtube:hover {
    background: linear-gradient(135deg, #ff3333 0%, #ff0000 100%);
    box-shadow: 0 4px 12px rgba(255, 0, 0, 0.4);
    transform: translateY(-2px);
}

/* ===========================
   レスポンシブデザイン
   =========================== */

@media (max-width: 1200px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
    }
    
    .sidebar-left {
        order: 2;
    }
    
    .content-main {
        order: 1;
    }
    
    .sidebar-right {
        order: 3;
    }
    
    .boss-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

@media (max-width: 768px) {
    .title-main {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.2rem;
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .countdown {
        flex-wrap: wrap;
    }
    
    .countdown-item {
        min-width: 70px;
    }
    
    .boss-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .chapter-title {
        font-size: 1.2rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .article-card.featured {
        grid-template-columns: 1fr;
    }
    
    .article-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-tabs {
        justify-content: flex-start;
    }
    
    .nav-tab {
        flex: 0 0 auto;
    }
    
    .copyright-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .copyright-content p {
        font-size: 0.75rem;
    }
    
    .channel-info-section .channel-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-md);
    }
    
    .channel-info-section .channel-details h4 {
        font-size: 1.1rem;
    }
    
    .channel-info-section .subscriber-count {
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .title-main {
        font-size: 2rem;
    }
    
    .countdown-value {
        font-size: 1.5rem;
    }
    
    .countdown-item {
        padding: var(--spacing-sm);
        min-width: 60px;
    }
    
    .demo-date {
        font-size: 1.5rem;
    }
}