/* about.php専用のスタイル */

/* ページタイトル */
.page-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    color: var(--color-text);
    position: relative;
    padding-bottom: 20px;
}

.page-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-primary);
}

/* セクション共通スタイル */
.about-section {
    margin-bottom: 60px;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.about-section h2 {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--color-primary);
    position: relative;
    padding-bottom: 15px;
}

.about-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--color-primary);
}

.about-section h3 {
    font-size: 1.3rem;
    margin: 30px 0 15px;
    color: #444;
}

.about-section p {
    line-height: 1.8;
    color: #555;
    margin-bottom: 15px;
}

.about-section ul {
    list-style: none;
    padding-left: 0;
}

.about-section ul li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 12px;
    line-height: 1.8;
    color: #555;
}

.about-section ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* 特徴グリッド */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
    background: #f9f9f9;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    border-radius: 50%;
}

.feature-icon i {
    font-size: 2.5rem;
    color: var(--color-primary);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--color-primary);
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 使い方リスト */
.usage-list {
    counter-reset: usage-counter;
    list-style: none;
    padding-left: 0;
}

.usage-list li {
    position: relative;
    padding-left: 50px;
    margin-bottom: 25px;
    line-height: 1.8;
    color: #555;
    counter-increment: usage-counter;
}

.usage-list li::before {
    content: counter(usage-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 35px;
    height: 35px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.usage-list li strong {
    color: #333;
    display: block;
    margin-bottom: 5px;
}

/* 運営者情報 */
.operator-info {
    background: #f5f5f5;
    padding: 30px;
    border-radius: 8px;
    margin-top: 20px;
}

.operator-info p {
    margin-bottom: 12px;
}

.operator-info strong {
    color: #333;
}

.operator-info .btn {
    margin-top: 20px;
    display: inline-block;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }

    .about-section {
        padding: 25px;
    }

    .about-section h2 {
        font-size: 1.5rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .usage-list li {
        padding-left: 45px;
    }

    .operator-info {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.8rem;
        margin-bottom: 30px;
    }

    .about-section {
        margin-bottom: 30px;
        padding: 20px;
    }

    .about-section h2 {
        font-size: 1.3rem;
        margin-bottom: 20px;
    }

    .feature-card {
        padding: 20px;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
    }

    .feature-icon i {
        font-size: 2rem;
    }
}

/* 参考文献セクション */
.reference-books {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.book-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: inherit;
    padding: 15px;
    border-radius: 8px;
    background: #f9f9f9;
    transition: transform 0.2s, box-shadow 0.2s;
}

.book-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.book-card img {
    width: 100px;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 10px;
}

.book-title {
    font-size: 0.85rem;
    text-align: center;
    line-height: 1.4;
    color: #333;
}

/* サイト案内役セクション */
.navigator-profile {
    display: flex;
    gap: 40px;
    align-items: flex-start;
    margin-top: 20px;
}

.navigator-image {
    flex-shrink: 0;
}

.navigator-image img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: 4px solid #e8f5e9;
}

.navigator-info {
    flex: 1;
}

.navigator-name {
    font-size: 1.6rem;
    color: var(--color-primary);
    margin: 0 0 5px 0;
    padding: 0;
}

.navigator-name::after {
    display: none;
}

.navigator-ruby {
    font-size: 0.9rem;
    color: #888;
    font-weight: normal;
    margin-left: 10px;
}

.navigator-role {
    display: inline-block;
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    color: var(--color-primary);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.navigator-details {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 10px 20px;
    margin-bottom: 20px;
}

.navigator-details dt {
    font-weight: bold;
    color: #555;
}

.navigator-details dd {
    margin: 0;
    color: #666;
    line-height: 1.6;
}

.navigator-message {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid var(--color-primary);
    font-style: italic;
    color: #555;
    line-height: 1.8;
    margin: 0;
}

@media (max-width: 480px) {
    .reference-books {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .book-card {
        padding: 10px;
    }

    .book-card img {
        width: 80px;
    }

    .book-title {
        font-size: 0.75rem;
    }

    .navigator-profile {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 25px;
    }

    .navigator-image img {
        width: 150px;
        height: 150px;
    }

    .navigator-name {
        font-size: 1.4rem;
    }

    .navigator-ruby {
        display: block;
        margin: 5px 0 0 0;
    }

    .navigator-details {
        grid-template-columns: 1fr;
        gap: 5px;
        text-align: left;
    }

    .navigator-details dt {
        margin-top: 10px;
    }

    .navigator-message {
        text-align: left;
        padding: 15px;
    }
}