/* 基本設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #C62828;
    --color-secondary: #4CAF50;
    --color-gold: #FFD700;
    --color-white: #FFFFFF;
    --color-dark-bg: #1a1a1a;
    --color-dark-card: #2b2b2b;
    --color-light-gray: #404040;
    --color-text: #FFFFFF;
    --color-text-light: #999999;
    --color-border: #333333;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--color-text);
    background-color: var(--color-dark-bg);
    line-height: 1.8;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--color-gold);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #FFC107;
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.3);
}

/* ヘッダー */
.site-header {
    background: linear-gradient(135deg, #1a1a1a 0%, #2b2b2b 100%);
    border-bottom: 3px solid var(--color-primary);
    padding: 30px 0 0 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.header-content {
    text-align: center;
    padding: 0 20px 25px 20px;
}

.site-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 2px 10px rgba(198, 40, 40, 0.5);
}

.site-description {
    font-size: 1.15rem;
    color: var(--color-text-light);
    font-weight: 400;
    opacity: 1;
}

/* ナビゲーション */
.main-nav {
    background-color: rgba(0, 0, 0, 0.3);
    padding: 0;
    border-top: 1px solid rgba(198, 40, 40, 0.3);
}

.main-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.main-nav li {
    margin: 0;
}

.main-nav a {
    display: block;
    padding: 15px 30px;
    color: var(--color-text);
    font-weight: 500;
    transition: all 0.3s ease;
}

.main-nav a:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* メインコンテンツ */
.main-content {
    padding: 60px 0;
}

/* ヒーローセクション */
.hero-section {
    position: relative;
    background-image: url('https://sspark.genspark.ai/cfimages?u1=8rcNIaE5i%2BjBn%2Bn1pMWohQg2NSrAM4JI1zAFCGr3lADKSEzKoaHD%2FVht7jOD2YHn6jAqBlVnVvsgT%2Bman%2Bo6LCi1m%2BqAT4Lr7GPYWioaMV%2BI%2Fzim10NOSycOsqPIg8tjqa%2BxxO%2BRKxj%2Bza4wfb2%2BTe5DWIBrcH3X4J%2FmmJ0Q9F3Ggql%2FpoLVc9oZOc8j4osrLHDBdVDfZqJG3Q6HKq34eekNiLT56BBTRBgInw%3D%3D&u2=YwUx7g%2BMJi7PRBxk&width=2560');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--color-white);
    padding: 120px 40px;
    border-radius: 12px;
    margin-bottom: 60px;
    text-align: center;
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.85) 0%, rgba(198, 40, 40, 0.7) 50%, rgba(0, 0, 0, 0.85) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 25px;
    font-weight: 700;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.8), 0 2px 4px rgba(0, 0, 0, 0.9);
    line-height: 1.3;
}

.hero-content p {
    font-size: 1.15rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto 30px;
    font-weight: 400;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.7);
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 30px;
}

.cta-button {
    display: inline-block;
    padding: 15px 35px;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-primary,
.cta-secondary {
    display: inline-block;
    padding: 18px 45px;
    font-size: 1.15rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: pointer;
    letter-spacing: 0.5px;
}

.cta-primary {
    background: var(--color-secondary);
    color: var(--color-white);
    box-shadow: 0 4px 20px rgba(76, 175, 80, 0.4);
    border: none;
}

.cta-primary:hover {
    background: #66BB6A;
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 30px rgba(76, 175, 80, 0.6);
}

.cta-secondary {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-secondary:hover {
    background: var(--color-white);
    color: var(--color-dark-bg);
    border-color: var(--color-white);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3);
}

/* セクションタイトル */
.section-title {
    font-size: 2rem;
    color: var(--color-white);
    margin-bottom: 40px;
    padding-bottom: 15px;
    border-bottom: 3px solid var(--color-secondary);
    font-weight: 700;
}

/* 記事グリッド */
.articles-section {
    margin-bottom: 80px;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

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

.article-card {
    background-color: var(--color-dark-card);
    border-radius: 8px;
    padding: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    height: 100%;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.article-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    filter: brightness(0.7) contrast(1.1);
    transition: filter 0.3s ease;
}

.article-card-link:hover .article-image {
    filter: brightness(0.85) contrast(1.15);
}

.article-card-link:hover .article-card {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(198, 40, 40, 0.3);
    border-color: var(--color-primary);
}

.article-number {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 2.5rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.4);
    line-height: 1;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.article-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 700;
    line-height: 1.5;
    padding: 20px 30px 0 30px;
    color: var(--color-text);
    transition: color 0.3s ease;
}

.article-card-link:hover .article-title {
    color: var(--color-gold);
}

.article-excerpt {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
    padding: 0 30px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 30px 30px 30px;
}

.article-category {
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* About セクション */
.about-section {
    background-color: var(--color-dark-card);
    padding: 50px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    margin-bottom: 60px;
    border: 1px solid var(--color-border);
}

.about-content p {
    margin-bottom: 20px;
    line-height: 1.9;
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* 記事ページ用スタイル */
.article-header {
    position: relative;
    color: var(--color-white);
    padding: 0;
    border-radius: 12px;
    margin-bottom: 60px;
    text-align: center;
    overflow: hidden;
}

.article-header-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
}

.article-header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0.6));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 60px 40px;
}

.article-header-overlay .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 600px !important;
    width: auto !important;
}

.article-header h1,
.article-header-overlay h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    font-weight: 700;
    position: relative;
    z-index: 1;
    display: block;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    line-height: 1.3;
    padding: 0 20px;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.9), 0 2px 4px rgba(0, 0, 0, 1), 0 0 20px rgba(0, 0, 0, 0.8);
}

/* 長いタイトルを1行に収める */
.article-header h1 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

.article-header-overlay h1 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

.article-meta-info {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    font-size: 0.95rem;
}

.article-content {
    background-color: var(--color-dark-card);
    padding: 60px 50px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    margin-bottom: 60px;
    border: 1px solid var(--color-border);
}

.article-content h2 {
    font-size: 1.8rem;
    color: #FFFFFF;
    margin: 50px 0 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-border);
    font-weight: 700;
    text-shadow: none;
}

.article-content h2:first-child {
    margin-top: 0;
}

.article-content h3 {
    font-size: 1.4rem;
    color: var(--color-text);
    margin: 40px 0 20px;
    font-weight: 700;
}

.article-content p {
    margin-bottom: 25px;
    line-height: 1.9;
    color: var(--color-text-light);
}

.article-content ul,
.article-content ol {
    margin: 25px 0 25px 30px;
    line-height: 1.9;
}

.article-content li {
    margin-bottom: 12px;
    color: var(--color-text-light);
}

.article-content strong {
    color: var(--color-gold);
    font-weight: 700;
}

.highlight-box {
    background-color: var(--color-light-gray);
    border-left: 4px solid var(--color-secondary);
    padding: 25px;
    margin: 30px 0;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

.highlight-box p:last-child {
    margin-bottom: 0;
}

.cta-box {
    background: var(--color-dark-card);
    color: var(--color-white);
    padding: 50px 40px;
    border-radius: 20px;
    text-align: center;
    margin: 60px 0;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
    position: relative;
    overflow: hidden;
    border: 2px solid var(--color-primary);
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.cta-box h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--color-white);
    position: relative;
    z-index: 1;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.cta-box p {
    font-size: 1.15rem;
    margin-bottom: 30px;
    color: var(--color-white);
    position: relative;
    z-index: 1;
    line-height: 1.8;
    opacity: 0.95;
}

.cta-box .cta-buttons {
    margin-top: 0;
    position: relative;
    z-index: 1;
}

/* ナビゲーション（記事間） */
.article-navigation {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 60px;
}

.nav-link {
    flex: 1;
    background-color: var(--color-dark-card);
    padding: 25px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.nav-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(255, 215, 0, 0.2);
    border-color: var(--color-gold);
}

.nav-link a {
    display: block;
    color: var(--color-text);
}

.nav-link-label {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-link-title {
    font-weight: 700;
    color: var(--color-white);
    font-size: 1.1rem;
    line-height: 1.4;
}

/* フッター */
.site-footer {
    background-color: var(--color-dark-card);
    border-top: 2px solid var(--color-border);
    padding: 40px 0;
    text-align: center;
}

.footer-text {
    color: var(--color-text-light);
    margin-bottom: 10px;
}

.footer-copyright {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .site-title {
        font-size: 1.8rem;
    }

    .site-description {
        font-size: 1rem;
    }

    .main-nav a {
        padding: 12px 20px;
        font-size: 0.9rem;
    }

    .hero-section {
        padding: 80px 30px;
    }

    .hero-content h2 {
        font-size: 1.8rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .articles-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .article-image {
        height: 180px;
    }

    .article-number {
        top: 15px;
        right: 15px;
        font-size: 2rem;
    }

    .article-title {
        padding: 20px 25px 0 25px;
    }

    .article-header-image {
        height: 300px;
    }

    .article-header-overlay {
        padding: 40px 20px;
    }

    .article-header h1,
    .article-header-overlay h1 {
        font-size: 1.6rem;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }

    .article-header-overlay .container {
        max-width: 500px !important;
    }

    .article-content {
        padding: 40px 25px;
    }

    .article-content h2 {
        font-size: 1.5rem;
    }

    .article-content h3 {
        font-size: 1.2rem;
    }

    .article-navigation {
        flex-direction: column;
    }

    .about-section {
        padding: 30px 25px;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .cta-button,
    .cta-primary,
    .cta-secondary {
        padding: 15px 30px;
        font-size: 1rem;
        width: 100%;
        max-width: 300px;
    }

    .cta-box {
        padding: 40px 25px;
        border-radius: 15px;
    }

    .cta-box h3 {
        font-size: 1.6rem;
    }

    .cta-box p {
        font-size: 1.05rem;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 1.5rem;
    }

    .hero-content h2 {
        font-size: 1.4rem;
    }

    .article-image {
        height: 160px;
    }

    .article-title {
        font-size: 1.1rem;
        padding: 15px 20px 0 20px;
    }

    .article-excerpt {
        padding: 0 20px;
        font-size: 0.9rem;
    }

    .article-meta {
        padding: 0 20px 20px 20px;
    }

    .article-number {
        font-size: 1.8rem;
        top: 12px;
        right: 12px;
    }

    .article-header-image {
        height: 250px;
    }

    .article-header-overlay {
        padding: 30px 15px;
    }

    .article-header h1,
    .article-header-overlay h1 {
        font-size: 1.3rem;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }

    .article-header-overlay .container {
        max-width: 400px !important;
    }
}

/* 新しいナビゲーションスタイル（記事11〜20用） */
.nav {
    background-color: var(--color-primary);
    border-bottom: none;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    text-decoration: none;
    transition: color 0.3s ease;
    text-transform: uppercase;
}

.nav-logo:hover {
    color: var(--color-secondary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin: 0;
}

.nav-menu a {
    color: var(--color-text);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s ease;
    padding: 8px 16px;
}

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

.nav-cta {
    background: var(--color-secondary);
    color: var(--color-white) !important;
    padding: 10px 25px !important;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.5);
    background: #66BB6A;
}

/* content-sectionスタイル */
.content-section {
    margin-bottom: 40px;
}

.content-section h2 {
    color: #FFFFFF;
    font-size: 1.8rem;
    margin-top: 40px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-border);
    font-weight: 700;
    text-shadow: none;
}

.content-section h3 {
    color: var(--color-text);
    font-size: 1.4rem;
    margin-top: 30px;
    margin-bottom: 15px;
    font-weight: 600;
}

.content-section p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--color-text-light);
}

.content-section ul,
.content-section ol {
    margin-bottom: 20px;
    padding-left: 30px;
}

.content-section li {
    margin-bottom: 10px;
    line-height: 1.7;
    color: var(--color-text-light);
}

.content-section blockquote {
    background-color: var(--color-light-gray);
    border-left: 4px solid var(--color-primary);
    padding: 20px;
    margin: 20px 0;
    font-style: italic;
}

.quote-author {
    display: block;
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-style: normal;
    font-weight: 600;
}

/* StripChatウィジェット */
.stripchat-widget-container {
    max-width: 800px;
    margin: 60px auto;
    padding: 0;
    background: var(--color-dark-bg);
    overflow: hidden;
}

.stripchat-widget-container iframe {
    width: 100%;
    border: none;
    display: block;
    min-height: 500px;
}

@media (max-width: 768px) {
    .stripchat-widget-container {
        margin: 40px 20px;
    }
    
    .stripchat-widget-container iframe {
        min-height: 400px;
    }
}

@media (max-width: 480px) {
    .stripchat-widget-container {
        margin: 30px 20px;
    }
    
    .stripchat-widget-container iframe {
        min-height: 350px;
    }
}

/* 記事ナビゲーション */
.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 2px solid var(--color-light-gray);
}

.article-nav-prev,
.article-nav-next {
    flex: 1;
    padding: 20px;
    background-color: var(--color-white);
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.article-nav-prev:hover,
.article-nav-next:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* StripChat LPウィジェット */
.stripchat-lp-container {
    max-width: 800px;
    margin: 60px auto;
    padding: 0;
    background: var(--color-dark-bg);
    overflow: hidden;
}

.stripchat-lp-container iframe {
    width: 100%;
    border: none;
    display: block;
    min-height: 600px;
}

@media (max-width: 768px) {
    .stripchat-lp-container {
        margin: 40px 20px;
    }
    
    .stripchat-lp-container iframe {
        min-height: 500px;
    }
}

@media (max-width: 480px) {
    .stripchat-lp-container {
        margin: 30px 20px;
    }
    
    .stripchat-lp-container iframe {
        min-height: 450px;
    }
}

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

.article-nav-label {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.article-nav-title {
    display: block;
    font-size: 1.1rem;
    color: var(--color-white);
    font-weight: 600;
}

/* フッター */
.footer {
    background-color: var(--color-dark-card);
    border-top: 2px solid var(--color-border);
    padding: 30px 0;
    text-align: center;
    color: var(--color-text-light);
    margin-top: 80px;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .nav-content {
        flex-direction: column;
        gap: 20px;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .article-nav {
        flex-direction: column;
    }

    .article-nav-next {
        text-align: left;
    }
}