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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* ヘッダー */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1rem;
    opacity: 0.9;
}

/* コンテナ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* アプリカードグリッド */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.app-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.app-card h2 {
    color: #667eea;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.app-card p {
    color: #666;
    font-size: 0.95rem;
}

/* アプリ詳細ページ */
.app-detail {
    background: white;
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-top: 2rem;
}

.app-detail h1 {
    color: #667eea;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid #667eea;
}

.app-detail h2 {
    color: #333;
    font-size: 1.5rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.app-detail h3 {
    color: #555;
    font-size: 1.2rem;
    margin-top: 2rem;
    margin-bottom: 0.8rem;
}

.app-detail ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.app-detail li {
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

.app-detail p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* バックボタン */
.back-button {
    display: inline-block;
    margin-top: 2rem;
    padding: 0.8rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    font-weight: 500;
}

.back-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* セクション */
.section {
    margin-bottom: 2.5rem;
}

/* コンタクト情報 */
.contact-info {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.contact-info p {
    margin-bottom: 0.5rem;
}

/* プライバシーポリシー */
.privacy-section {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

/* フッター */
footer {
    text-align: center;
    padding: 2rem 1rem;
    color: #666;
    margin-top: 3rem;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.5rem;
    }

    .apps-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .app-detail {
        padding: 1.5rem;
    }

    .app-detail h1 {
        font-size: 1.6rem;
    }

    .container {
        padding: 1rem;
    }
}