/* S-TEKT 事例紹介ページ専用CSS */
/* コーポレートカラー: 生成り色（#FAFAF5）、天色（#0094C8）、濃藍（#0D2C54） */

:root {
    /* S-TEKT コーポレートカラー */
    --stekt-kinari: #FAFAF5;      /* 生成り色 - 背景 */
    --stekt-amairo: #0094C8;      /* 天色 - メイン */
    --stekt-koiai: #0D2C54;       /* 濃藍 - 強調 */
    
    /* エイリアス */
    --stekt-bg: var(--stekt-kinari);
    --stekt-primary: var(--stekt-amairo);
    --stekt-accent: var(--stekt-koiai);
}

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

body {
    font-family: 'Noto Sans JP', 'Yu Gothic', 'YuGothic', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
    background-color: var(--stekt-bg);
    color: #333;
    line-height: 1.8;
}

/* ヘッダー */
.site-header {
    background: linear-gradient(135deg, var(--stekt-amairo), var(--stekt-koiai));
    color: white;
    padding: 3rem 0;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.site-header h1 {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.site-header p {
    font-size: 1.4rem;
    opacity: 0.95;
    max-width: 900px;
    margin: 0 auto;
}

.site-header::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: rgba(255, 255, 255, 0.8);
    margin: 1.5rem auto 0;
    border-radius: 2px;
}

/* ナビゲーション */
.breadcrumb {
    background: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.breadcrumb ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: '>';
    margin: 0 0.5rem;
    color: #999;
}

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

.breadcrumb a:hover {
    color: var(--stekt-koiai);
    text-decoration: underline;
}

/* メインコンテンツ */
.main-content {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 2rem;
}

/* セクションタイトル */
.section-title {
    font-size: 2.5rem;
    color: var(--stekt-koiai);
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--stekt-primary);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* 事例グリッド（一覧ページ用） */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.case-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 148, 200, 0.2);
}

.case-card-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    background-color: #f0f0f0;
}

.case-card-content {
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.case-card-category {
    display: inline-block;
    background: var(--stekt-primary);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    margin-bottom: 1rem;
    align-self: flex-start;
}

.case-card-title {
    font-size: 1.5rem;
    color: var(--stekt-koiai);
    margin-bottom: 1rem;
    font-weight: bold;
}

.case-card-description {
    color: #666;
    margin-bottom: 1.5rem;
    flex: 1;
}

.case-card-link {
    display: inline-block;
    background: var(--stekt-primary);
    color: white;
    padding: 0.8rem 2rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    text-align: center;
    transition: all 0.3s ease;
}

.case-card-link:hover {
    background: var(--stekt-koiai);
    transform: translateX(5px);
}

/* 事例詳細ページ */
.case-detail {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 3rem;
}

.case-detail-header {
    margin-bottom: 2.5rem;
    text-align: center;
}

.case-detail-category {
    display: inline-block;
    background: var(--stekt-primary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
}

.case-detail-title {
    font-size: 2.5rem;
    color: var(--stekt-koiai);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.case-detail-subtitle {
    font-size: 1.2rem;
    color: #666;
    line-height: 1.6;
}

/* 画像ギャラリー */
.case-images {
    margin: 3rem 0;
}

.case-image-main {
    width: 100%;
    height: auto;
    max-height: 600px;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    background-color: #f8f9fa;
}

.case-image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.case-image-item {
    width: 100%;
    height: 250px;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    cursor: pointer;
    transition: transform 0.3s ease;
    background-color: #f8f9fa;
}

.case-image-item:hover {
    transform: scale(1.05);
}

/* 事例詳細セクション */
.case-section {
    margin: 3rem 0;
}

.case-section-title {
    font-size: 1.8rem;
    color: var(--stekt-koiai);
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 4px solid var(--stekt-primary);
}

.case-section-content {
    font-size: 1.1rem;
    line-height: 1.9;
    color: #444;
}

.case-section-content p {
    margin-bottom: 1.5rem;
}

.case-highlight {
    background: linear-gradient(to right, rgba(0, 148, 200, 0.1), rgba(0, 148, 200, 0.05));
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--stekt-primary);
    margin: 2rem 0;
}

.case-highlight h3 {
    color: var(--stekt-koiai);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.case-highlight ul {
    list-style-position: inside;
    margin-left: 1rem;
}

.case-highlight li {
    margin-bottom: 0.8rem;
    color: #444;
}

/* ボタン */
.btn-back {
    display: inline-block;
    background: var(--stekt-accent);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(13, 44, 84, 0.3);
    text-align: center;
    margin: 2rem auto;
    display: block;
    max-width: 300px;
}

.btn-back:hover {
    background: var(--stekt-primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 148, 200, 0.4);
}

/* フッター */
.site-footer {
    background: var(--stekt-koiai);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

.site-footer a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.site-footer a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .site-header h1 {
        font-size: 2rem;
    }
    
    .site-header p {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .case-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .case-detail {
        padding: 2rem 1.5rem;
    }
    
    .case-detail-title {
        font-size: 1.8rem;
    }
    
    .case-image-grid {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: 0 1rem;
    }
}