/* --- sub.css: 下層ページ専用スタイル --- */

/* 下層ページ専用の控えめなHero */
.sub-hero {
    height: 40vh;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    text-align: center;
    background-color: #000;
}

.sub-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.4;
    z-index: 1;
}

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

/* 下層ページのタイトル：TOPより小さく、気品重視 */
.sub-hero-content h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem) /* Import existing styles */
    font-weight: 300;
    letter-spacing: 0.2em;
    color: #fff;
    margin-top: 10px;
}

.sub-hero-content p {
    font-size: 0.8rem;
    letter-spacing: 0.5em;
    color: var(--color-accent);
    text-transform: uppercase;
}

/* 企業情報セクションの調整 */
.company-data-list {
    margin-top: 40px;
}

/* --- Mobile Responsive Styles --- */
@media (max-width: 768px) {
    .sub-hero {
        height: 30vh;
        min-height: 250px;
        padding-top: 60px; /* ヘッダー分を考慮 */
    }

    .sub-hero-content h1 {
        font-size: clamp(1.5rem, 6vw, 2rem) !important;
        margin-top: 5px;
    }

    .sub-hero-content p {
        font-size: 0.7rem;
        margin-top: 10px;
    }

    .post-article {
        max-width: 100%;
        padding: 20px 15px;
        margin: 0;
    }

    .post-header {
        margin-bottom: 30px;
    }

    .post-title {
        font-size: clamp(1.5rem, 5vw, 1.8rem);
        line-height: 1.3;
        margin-bottom: 15px;
    }

    .post-meta {
        flex-direction: column;
        gap: 10px;
        font-size: 0.8rem;
    }

    .post-content {
        font-size: 0.95rem;
        line-height: 1.6;
        margin-bottom: 30px;
    }

    .post-content h2,
    .post-content h3,
    .post-content h4 {
        font-size: clamp(1.2rem, 4vw, 1.5rem);
        margin-top: 25px;
        margin-bottom: 15px;
    }

    .company-data-list {
        margin-top: 30px;
        padding: 0 15px;
    }

    .info-label {
        font-size: 0.85rem;
    }

    .info-value {
        font-size: 0.9rem;
    }
}

/* --- 記事詳細ページスタイル --- */
.post-article {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 0;
}

.post-header {
    text-align: center;
    margin-bottom: 40px;
}

.post-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 300;
    letter-spacing: 0.1em;
    color: var(--color-text);
    margin-bottom: 20px;
    line-height: 1.4;
}

.post-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.post-date {
    display: flex;
    align-items: center;
    gap: 8px;
}

.post-date i {
    color: var(--color-accent);
}

.post-content {
    line-height: 1.8;
    font-size: 1.05rem;
    color: var(--color-text);
    margin-bottom: 40px;
}

.post-content h2,
.post-content h3,
.post-content h4 {
    margin-top: 40px;
    margin-bottom: 20px;
    color: var(--color-text);
}

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

.post-content ul,
.post-content ol {
    margin: 20px 0;
    padding-left: 30px;
}

.post-footer {
    border-top: 1px solid var(--color-border);
    padding-top: 30px;
    margin-top: 40px;
}

.post-tags {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.tags-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.tags-label i {
    color: var(--color-accent);
}

.tag-link {
    display: inline-block;
    padding: 6px 12px;
    background: var(--color-light);
    color: var(--color-text);
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.tag-link:hover {
    background: var(--color-accent);
    color: #fff;
}

/* --- ナビゲーションスタイル --- */
.post-navigation {
    margin: 60px 0;
}

.nav-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.nav-prev,
.nav-next {
    display: flex;
}

.nav-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--color-light);
    border-radius: 10px;
    text-decoration: none;
    color: var(--color-text);
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
    width: 100%;
}

.nav-card:hover {
    background: var(--color-accent);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    flex-shrink: 0;
}

.nav-content {
    flex: 1;
}

.nav-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 5px;
}

.nav-title {
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.4;
}

.nav-card:hover .nav-label {
    color: rgba(255,255,255,0.8);
}

/* --- 関連記事スタイル --- */
.related-posts {
    margin: 60px 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.related-posts h3 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    color: var(--color-text);
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.related-post-item {
    background: var(--color-light);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
}

.related-post-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.related-post-item a {
    display: block;
    padding: 20px;
    text-decoration: none;
    color: var(--color-text);
}

.related-post-date {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 10px;
}

.related-post-title {
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.4;
}

/* --- 戻るボタンスタイル --- */
.back-to-list {
    text-align: center;
    margin: 40px 0;
}

.back-to-list .btn-more {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 30px;
    background: var(--color-accent);
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.back-to-list .btn-more:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

/* --- レスポンシブ対応 --- */
@media (max-width: 768px) {
    .nav-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .related-posts-grid {
        grid-template-columns: 1fr;
    }

    .post-meta {
        flex-direction: column;
        gap: 10px;
    }

    .post-tags {
        justify-content: center;
    }
}

/* --- sub.css: 下層ページ専用スタイル --- */
.company-info-item {
    display: flex;
    padding: 30px 0;
    border-bottom: 1px solid var(--color-border);
    align-items: baseline;
}

.info-label {
    width: 200px;
    flex-shrink: 0;
    font-size: 0.85rem;
    color: var(--color-accent);
    font-weight: 700;
    letter-spacing: 0.1em;
}

.info-value {
    font-size: 1rem;
    color: var(--color-text);
    line-height: 1.8;
}

/* レスポンシブ：スマホでは縦並びに */
@media (max-width: 768px) {
    .sub-hero { height: 30vh; }
    .company-info-item { flex-direction: column; gap: 10px; }
    .info-label { width: 100%; font-size: 0.75rem; }
}