:root {
    --primary-color: #000;
    --secondary-color: #666;
    --background-color: #fff;
    --accent-color: #f4f4f4;
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    color: var(--primary-color);
    background-color: var(--background-color);
    letter-spacing: 0.05em;
}

/* ヘッダースタイル */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #fff;
    z-index: 1000;
}

.member-info {
    background: #000;
    width: 100%;
    height: 36px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
}

.member-info-content {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 0 20px;
    color: #fff;
    font-size: 0.8rem;
    gap: 1rem;
}

.member-id-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logout-btn {
    background: none;
    border: none;
    color: #fff;
    font-size: 0.8rem;
    padding: 4px 8px;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.logout-btn:hover {
    opacity: 1;
    text-decoration: underline;
}

.nav-menu {
    border-bottom: 1px solid #eee;
    margin-top: 36px;
    position: relative;
}

/* ハンバーガーメニューボタン */
.hamburger-menu {
    display: none;
    position: absolute;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.hamburger-line {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 5px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* ハンバーガーメニューがアクティブ時のアニメーション */
.hamburger-menu.active .hamburger-line:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger-menu.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active .hamburger-line:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* モバイルナビゲーションオーバーレイ */
.mobile-nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-nav-overlay.active {
    display: flex;
    opacity: 1;
}

.mobile-nav-list {
    list-style: none;
    margin: 0;
    padding: 80px 20px 20px;
    width: 100%;
    background-color: #fff;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    max-width: 300px;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.mobile-nav-overlay.active .mobile-nav-list {
    transform: translateX(0);
}

.mobile-nav-list li {
    border-bottom: 1px solid #eee;
}

.mobile-nav-list li:last-child {
    border-bottom: none;
}

.mobile-nav-link {
    display: block;
    padding: 15px 0;
    text-decoration: none;
    color: #333;
    font-size: 1.1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    color: #000;
    background-color: #f8f8f8;
    padding-left: 10px;
}

.mobile-nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: #000;
}

.nav-list {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

/* メインコンテンツの調整 */
.main-content {
    margin-top: 120px;
    padding: 0 2rem;
}

/* 商品グリッド */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

.product-card {
    border: none;
    margin-bottom: 2rem;
    transition: transform 0.3s ease;
    cursor: pointer;
}

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

.product-card img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    background-color: #f8f8f8;
}

.product-card .card-body {
    padding: 1rem 0;
}

.product-card .card-title {
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
    font-weight: normal;
}

.product-card .price {
    font-size: 0.85rem;
    color: #333;
    margin-bottom: 0;
}

/* クションタイトル */
.section-title {
    text-align: center;
    margin: 3rem 0;
    font-size: 1.2rem;
    font-weight: normal;
    letter-spacing: 0.2em;
}

/* フォーム */
.form-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 2rem;
}

.form-control {
    border-radius: 0;
    border: 1px solid #ddd;
    padding: 0.8rem;
    font-size: 0.9rem;
}

.btn-primary {
    background-color: #000;
    border: none;
    border-radius: 0;
    padding: 0.8rem 2.5rem;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

/* お知らせセクション */
.news-section {
    background-color: var(--accent-color);
    padding: 3rem;
    margin: 2rem 0;
}

.news-item {
    border-bottom: 1px solid #ddd;
    padding: 1rem 0;
    font-size: 0.9rem;
}

.color-variation {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.color-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid #ddd;
}

.color-dot.black { background-color: #000; }
.color-dot.white { background-color: #fff; }
.color-dot.navy { background-color: #1b1b4b; }
.color-dot.beige { background-color: #f5f5dc; }
.color-dot.gray { background-color: #808080; }

/* Swiper関連のスタイル */
.product-swiper {
    padding: 20px 40px;
}

.swiper-button-next,
.swiper-button-prev {
    color: #000;
}

.swiper-button-next:after,
.swiper-button-prev:after {
    font-size: 20px;
}

.swiper-container {
    position: relative;
    padding: 20px 0 50px;
}

.product-swiper {
    padding: 0 60px;
}

/* ナビゲーションボタンのスタイル */
.swiper-nav-button {
    width: 50px !important;
    height: 100% !important;
    top: 0 !important;
    background: none !important;
}

.swiper-nav-button::after {
    content: none !important;
}

.nav-button-inner {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 80px;
    background: rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-button-inner:hover {
    background: rgba(0, 0, 0, 0.1);
}

.swiper-button-prev .nav-button-inner {
    left: 0;
    border-top-right-radius: 40px;
    border-bottom-right-radius: 40px;
}

.swiper-button-next .nav-button-inner {
    right: 0;
    border-top-left-radius: 40px;
    border-bottom-left-radius: 40px;
}

.nav-arrow {
    color: #000;
    font-size: 20px;
    font-weight: bold;
}

/* カスタムページネーション */
.custom-pagination {
    position: relative;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.custom-pagination .swiper-pagination-bullet {
    width: 30px;
    height: 4px;
    border-radius: 2px;
    background: #ddd;
    opacity: 1;
    cursor: pointer;
    transition: all 0.3s ease;
}

.custom-pagination .swiper-pagination-bullet-active {
    background: #000;
    width: 40px;
}

/* レコメンド商品グリッドを修正 */
.recommended-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin: 2rem auto;
    max-width: 1200px;
}

.recommended-main {
    width: 100%;
    display: flex;
    justify-content: center;
}

.recommended-main .recommended-item {
    width: 300px;
    height: 400px;
    position: relative;
    overflow: hidden;
    background: #f8f8f8;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.recommended-sub {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.recommended-sub .recommended-item {
    width: 100%;
    height: 400px;
    position: relative;
    overflow: hidden;
    background: #f8f8f8;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.recommended-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.recommended-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    color: #fff;
}

.recommended-main .recommended-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: normal;
    letter-spacing: 0.1em;
}

.recommended-sub .recommended-info h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    font-weight: normal;
    letter-spacing: 0.1em;
}

.btn-outline {
    background: transparent;
    border: 1px solid #fff;
    color: #fff;
    padding: 0.5rem 2rem;
    margin-top: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-outline:hover {
    background: #fff;
    color: #000;
}

/* コンタクトフォーム */
.contact-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
}

.contact-header {
    text-align: center;
    margin-bottom: 2rem;
}

.contact-header p {
    color: #666;
    font-size: 0.9rem;
}

.contact-form {
    background: #fff;
    padding: 2rem;
    border: 1px solid #eee;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #333;
}

.form-control,
.form-select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    background: #fff;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: #000;
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.form-action {
    text-align: center;
    margin-top: 2rem;
}

.btn-submit {
    background: #000;
    color: #fff;
    border: none;
    padding: 1rem 4rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn-submit:hover {
    background: #333;
}

/* 商品詳細モーダル */
.product-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
    overflow-y: auto;
}

.product-modal.show {
    display: block;
    opacity: 1;
}

.product-modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 1rem;
    max-width: 640px;
    width: 80%;
    max-height: 80vh;
    overflow-y: auto;
    border-radius: 4px;
    box-sizing: border-box;
}

.product-modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.product-modal-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.product-modal-info {
    padding: 0.5rem 0;
}

.product-modal-actions {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 0.5rem;
    border-top: 1px solid #eee;
}

.action-btn {
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.action-btn.good-btn {
    background: #e8f5e9;
    color: #2e7d32;
}

.action-btn.bad-btn {
    background: #ffebee;
    color: #c62828;
}

.action-btn.buy-btn {
    background: #000;
    color: #fff;
}

.action-btn.disabled {
    background: #f5f5f5;
    color: #9e9e9e;
    cursor: default;
}

.action-btn.buy-btn.purchased {
    background: #f5f5f5;
}

/* モーダル関連 */
.modal-close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    border: none;
    background: none;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    color: #666;
    transition: color 0.3s ease;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close-btn:hover {
    color: #000;
}

.modal-close-hint {
    margin-top: 1.5rem;
    font-size: 0.8rem;
    color: #666;
    opacity: 0.7;
}

/* ログイン関連 */
.login-container {
    max-width: 400px;
    margin: 0 auto;
    padding: 2rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-form {
    background: #fff;
    padding: 2rem;
    border: 1px solid #eee;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .member-info-content {
        right: 10px;
        padding: 0 10px;
    }
    
    /* ハンバーガーメニューを表示 */
    .hamburger-menu {
        display: block;
    }
    
    /* デスクトップナビゲーションを非表示 */
    .desktop-nav {
        display: none;
    }
    
    .nav-list {
        padding: 1rem 0.5rem;
        gap: 1rem;
        overflow-x: auto;
        overflow-y: hidden;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none; /* Firefox */
        -ms-overflow-style: none; /* IE and Edge */
    }
    
    .nav-list::-webkit-scrollbar {
        display: none; /* Chrome, Safari, Opera */
    }
    
    .nav-list li {
        flex-shrink: 0;
        display: inline-block;
    }
    
    .nav-link {
        font-size: 0.8rem;
        padding: 0.5rem 0.8rem;
        white-space: nowrap;
    }

    .main-content {
        margin-top: 100px;
        padding: 0 1rem;
    }

    .recommended-main .recommended-item {
        width: 300px;
        height: 400px;
    }

    .recommended-sub {
        grid-template-columns: repeat(2, 1fr);
    }

    .recommended-info {
        padding: 1rem;
    }

    .recommended-main .recommended-info h3 {
        font-size: 1.2rem;
    }

    .product-modal-body {
        grid-template-columns: 1fr;
    }

    .contact-container {
        padding: 1rem;
    }

    .contact-form {
        padding: 1rem;
    }

    .btn-submit {
        width: 100%;
        padding: 1rem;
    }

    .product-modal-content {
        width: 90%;
        max-height: 90vh;
        padding: 1rem;
    }

    .product-modal-body {
        grid-template-columns: 1fr;
    }

    .product-modal-image img {
        width: 100%;
        height: auto;
        max-height: 150px;
    }

    .product-modal-info {
        padding: 0.5rem 0;
    }

    .product-modal-actions {
        margin-top: 1rem;
        padding-top: 0.5rem;
        border-top: 1px solid #eee;
    }

    .action-btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* ユーティリティクラス */
.hidden {
    display: none;
}

/* アニメーション */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* セクションナビゲーション */
.section-navigation {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin: 4rem auto;
    max-width: 1200px;
    padding: 0 2rem;
    transition: gap 0.3s ease;
}

.nav-card {
    cursor: pointer;
    transition: transform 0.3s ease;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    background-color: #e0e0e0;
}

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

.nav-card-image {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    aspect-ratio: 3/2;
}

.nav-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
    opacity: 0.5;
}

.nav-card:hover .nav-card-image img {
    transform: scale(1.05);
}

.nav-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: #333;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
}

.nav-card-overlay h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: normal;
    letter-spacing: 0.2em;
}

.nav-card-overlay p {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 1rem;
}

.nav-arrow {
    font-size: 1.2rem;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
    display: inline-block;
}

.nav-card:hover .nav-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ログインカード */
.login-card {
    grid-column: 1 / -1;
    background: var(--accent-color);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 1;
    height: auto;
    margin-top: 2rem;
}

.login-card[style*="display: none"] {
    opacity: 0;
    height: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.nav-card-content {
    padding: 3rem;
    text-align: center;
}

.nav-card-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    letter-spacing: 0.2em;
}

.nav-card-content p {
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

.nav-card-button {
    background: var(--primary-color);
    color: #fff;
    border: none;
    padding: 1rem 3rem;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.nav-card-button:hover {
    background: #333;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .section-navigation {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 1rem;
    }

    .nav-card-overlay {
        padding: 1.5rem;
    }

    .nav-card-overlay h3 {
        font-size: 1rem;
    }

    .nav-card-overlay p {
        font-size: 0.8rem;
    }

    .nav-card-content {
        padding: 2rem;
    }
}

/* セクションナビゲーションのグリッドを調整 */
.section-navigation {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin: 4rem auto;
    max-width: 1200px;
    padding: 0 2rem;
    transition: gap 0.3s ease;
}

/* ログインカード非表示時のグリッドギャップ調整 */
.section-navigation:has(.login-card[style*="display: none"]) {
    gap: 2rem;
}

/* レスポンシブ対応も修正 */
@media (max-width: 480px) {
    .recommended-sub {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
    }
}

/* レコメンド下段のSwiper用スタイルを更新 */
.recommend-sub-swiper {
    padding: 0 40px;
    margin: 0 auto;
    max-width: 1200px;
}

.recommended-sub {
    position: relative;
    padding: 20px 0 40px; /* 下部のパディングを増やしてページネーション用のスペースを確保 */
}

.recommended-sub .swiper-slide {
    height: auto;
    width: 300px !important;
}

.recommended-sub .recommended-item {
    width: 100%;
    height: 400px;
    margin: 0;
}

.recommended-sub .swiper-nav-button {
    width: 40px;
    height: 80px;
}

/* カスタムページネーション */
.recommend-sub-swiper .custom-pagination {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.recommend-sub-swiper .custom-pagination .swiper-pagination-bullet {
    width: 30px;
    height: 4px;
    border-radius: 2px;
    background: #ddd;
    opacity: 1;
    cursor: pointer;
    transition: all 0.3s ease;
}

.recommend-sub-swiper .custom-pagination .swiper-pagination-bullet-active {
    background: #000;
    width: 40px;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .recommend-sub-swiper {
        padding: 0 30px;
    }

    .recommended-sub .recommended-item {
        height: 300px;
    }
}

/* 送信完了モーダル */
.send-modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    z-index: 3000;
    max-width: 400px;
    width: 90%;
    text-align: center;
}

.send-modal.show-modal {
    display: block;
}

.send-modal-icon {
    font-size: 2rem;
    color: #4caf50;
    margin-bottom: 1rem;
}

.send-modal-message {
    font-size: 1rem;
    color: #333;
    margin-bottom: 1rem;
}

.modal-close-hint {
    font-size: 0.8rem;
    color: #666;
    opacity: 0.7;
}

/* GA4 Test ページのスタイル */
.ga4test-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.ga4test-header {
    text-align: center;
    margin-bottom: 30px;
}

.ga4test-form {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.ga4test-form .form-group {
    margin-bottom: 20px;
}

.ga4test-form .form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.ga4test-form .form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.ga4test-form .form-action {
    text-align: center;
    margin-top: 30px;
}

.ga4test-form .btn-submit {
    background-color: #007bff;
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

.ga4test-form .btn-submit:hover {
    background-color: #0056b3;
}

.ga4test-form .radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 10px;
}

.ga4test-form .radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 8px 15px;
    background: #f8f9fa;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.ga4test-form .radio-label:hover {
    background: #e9ecef;
}

.ga4test-form .radio-label input[type="radio"] {
    margin-right: 8px;
}

.ga4test-form .radio-label input[type="radio"]:checked + span {
    font-weight: 500;
}

/* Sites ページのスタイル */
.sites-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

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

.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.site-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.site-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.site-card-content {
    padding: 30px;
    text-align: center;
}

.site-card h3 {
    margin: 0 0 10px 0;
    color: #333;
    font-size: 24px;
    font-weight: 600;
}

.site-card p {
    margin: 0 0 25px 0;
    color: #666;
    font-size: 16px;
}

.site-link {
    text-decoration: none;
    display: inline-block;
}

.btn-site {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-site:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .sites-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .site-card-content {
        padding: 20px;
    }
    
    .site-card h3 {
        font-size: 20px;
    }
}

/* より小さな画面サイズ（iPhone SEなど）への対応 */
@media (max-width: 480px) {
    .nav-list {
        padding: 0.8rem 0.3rem;
        gap: 0.8rem;
    }
    
    .nav-link {
        font-size: 0.75rem;
        padding: 0.4rem 0.6rem;
    }
    
    .member-info-content {
        padding: 0 5px;
        font-size: 0.7rem;
    }
    
    .main-content {
        margin-top: 90px;
        padding: 0 0.5rem;
    }
    
    .section-title {
        font-size: 1rem;
        margin: 2rem 0;
    }
    
    .site-description,
    .page-description {
        font-size: 0.9rem;
        line-height: 1.5;
    }
}