/* リセットCSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基本設定 */
:root {
    --primary-color: #1a1a1a;
    --accent-color: #c41e3a; /* ラグビーボールを想起させる赤茶色 */
    --text-color: #333;
    --light-gray: #f5f5f5;
}

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.header.hide {
    transform: translateY(-100%);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo a {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: 2px;
    display: flex;
    align-items: center;
}

.logo img {
    max-height: 100px;
    width: auto;
}

/* ナビゲーション */
.nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* メインビジュアル */
.main-visual {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.slider {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 100vh;
}

.slide {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4); /* 黒のオーバーレイを40%の透明度で追加 */
}

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

.visual-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    font-family: 'Dancing Script', cursive;
}

.highlighted-text {
    font-weight: bolder;
    font-size: 1.5rem; /* フォントサイズを大きく */
    line-height: 1.6; /* 行間を広げて見やすく */
}

.visual-text h1 {
    font-size: 5rem;
    margin-bottom: 20px;
    letter-spacing: 4px;
    font-weight: bolder;
}

.news {
    padding: 50px 0;
    background-color: #f9f9f9;
}

.news .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.news .section-title {
    font-size: 2.5rem;
    margin-bottom: 30px;
    text-align: center;
}

.news-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.news-item h3 {
    font-size: 1.75rem;
    margin-bottom: 10px;
}

.news-item p {
    font-size: 1rem;
    line-height: 1.6;
}

/* クラブの魅力セクション */
.club-features {
    position: relative;
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    overflow: hidden;
}

/* 装飾的な背景要素 */
.club-features::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0,123,255,0.1) 0%, rgba(0,123,255,0) 70%);
    border-radius: 50%;
    transform: translate(100px, -150px);
}

.club-features .section-title {
    font-size: 2.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    color: #2d3436;
}

.club-features .section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #007BFF;
}

.features-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    gap: 40px;
    padding: 0 20px;
}

.feature-box {
    width: 100%;
    background: #ffffff;
    border-radius: 16px;
    padding: 35px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.feature-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: #007BFF;
    transition: height 0.4s ease;
}

.feature-box:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.08);
}

.feature-box:hover::before {
    height: 100%;
}

.feature-box h3 {
    font-size: 1.5rem;
    color: #2d3436;
    margin-bottom: 20px;
    padding-left: 15px;
    position: relative;
}

.feature-box p {
    color: #636e72;
    line-height: 1.8;
    margin-bottom: 0;
}

.join-us {
    width: 100%;
    max-width: 800px;
    margin: 60px auto;  /* 上下左右の中央配置 */
    text-align: center;
    padding: 40px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.join-us .highlight {
    font-size: 1.8rem;
    color: #e74c3c;
    font-weight: 700;
    margin-bottom: 15px;
    display: block;
}

.contact-button-wrapper {
    margin-top: 40px;
}

.contact-button {
    display: inline-flex;
    align-items: center;
    padding: 18px 40px;
    background: #007BFF;
    color: #ffffff;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,123,255,0.3);
}

.contact-button:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,123,255,0.4);
}

.arrow-icon {
    margin-left: 10px;
    transition: transform 0.3s ease;
}

.contact-button:hover .arrow-icon {
    transform: translateX(5px);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .club-features {
        padding: 60px 0;
    }

    .club-features .section-title {
        font-size: 2.2rem;
    }

    .features-content {
        gap: 30px;
    }

    .feature-box {
        padding: 25px;
    }

    .join-us {
        margin: 40px 20px;
        padding: 30px 20px;
    }
}

/* リンクセクション */
.link-section {
    padding: 80px 0;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.link-card {
    position: relative;
    height: 300px;
    overflow: hidden;
    border-radius: 10px;
    text-decoration: none;
    color: white;
    background: rgba(0, 0, 0, 0.7);    ;
    transition: transform 0.3s ease;
}

.link-card:hover {
    transform: translateY(-10px);
}

.link-content {
    position: absolute;
    bottom: 30px;
    left: 30px;
}

.link-content h2 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.arrow {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.link-card:hover .arrow {
    transform: translateX(10px);
}

/* SNSセクション */
.sns-section {
    padding: 80px 0;
    background: var(--light-gray);
}

.sns-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.sns-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.sns-card h3 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.sns-link {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform 0.3s ease;
}

.sns-link:hover {
    transform: translateY(-5px);
}

.sns-handle {
    display: block;
    margin-top: 15px;
    color: var(--accent-color);
    font-weight: 600;
    text-align: center;
}

.sns-handle::after {
    content: '→';
    margin-left: 5px;
    transition: transform 0.3s ease;
    display: inline-block;
}

.sns-link:hover .sns-handle::after {
    transform: translateX(5px);
}

.sns-card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.sns-link:hover img {
    transform: scale(1.03);
}

/* フッター */
footer {
    background: var(--primary-color);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-logo a {
    color: white;
    text-decoration: none;
    font-size: 24px;
    font-weight: bold;
}

.footer-nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

.footer-nav a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-nav a:hover {
    opacity: 1;
}

.copyright {
    text-align: center;
    opacity: 0.6;
    font-size: 14px;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: white;
        padding: 20px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .nav-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
    }

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

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

    .visual-text h1 {
        font-size: 3.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

    .footer-nav ul {
        flex-direction: column;
        gap: 15px;
    }
}

/* ハンバーガーメニュー */
.nav-toggle {
    display: none;
    width: 28px;
    height: 20px;
    position: relative;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: #333;
    left: 0;
    transition: all 0.3s ease;
}

.nav-toggle span:nth-child(1) { top: 0; }
.nav-toggle span:nth-child(2) { top: 9px; }
.nav-toggle span:nth-child(3) { top: 18px; }

/* ハンバーガーメニューアクティブ時 */
.nav-toggle.active span:nth-child(1) {
    top: 9px;
    transform: rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    top: 9px;
    transform: rotate(-45deg);
}

/* モバイル対応 */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 30px;
        padding: 20px;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li a {
        font-size: 18px;
        display: block;
        padding: 10px;
    }
}

.contact-button-wrapper {
    text-align: center;
    margin-top: 40px;
}

.contact-button {
    display: inline-block;
    padding: 15px 40px;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: all 0.3s ease;
    position: relative;
}

.contact-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(196, 30, 58, 0.3);
}

.contact-button::after {
    content: '→';
    margin-left: 10px;
    transition: transform 0.3s ease;
}

.contact-button:hover::after {
    transform: translateX(5px);
}

/* メンバーページのスタイル */
.members-page {
    padding-top: 80px; /* ヘッダーの高さ分 */
}

.members-hero {
    height: 300px;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
                url('../image/members-bg.jpg') center/cover;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
}

.members-hero h1 {
    font-size: 3.5rem;
    margin-bottom: 10px;
    letter-spacing: 3px;
}

.members-section {
    padding: 80px 0;
}

.members-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    position: relative;
}

.members-section h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-color);
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 20px;
}

.member-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    cursor: pointer;
}

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

.member-image {
    position: relative;
    height: 300px;
    overflow: hidden;
}

.member-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.position {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--accent-color);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: bold;
}

.member-info {
    padding: 20px;
    text-align: center;
}

.member-info h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.number {
    font-size: 1.2rem;
    color: var(--accent-color);
    font-weight: bold;
    margin-bottom: 10px;
}

.info-grid dt{
    font-weight: bolder;
}

.details {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 10px;
}

.comment {
    font-size: 0.95rem;
    font-style: italic;
    color: #444;
}

/* セクションの背景色を変える */
.forwards {
    background: var(--light-gray);
}

.backs {
    background: white;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .members-hero h1 {
        font-size: 2.5rem;
    }

    .members-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
        padding: 10px;
    }

    .member-image {
        height: 250px;
    }
}

.view-more {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-top: 10px;
}

/* モーダルスタイル */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    overflow-y: auto;
}

.modal-content {
    position: relative;
    background: white;
    width: 90%;
    max-width: 800px;
    margin: 50px auto;
    border-radius: 15px;
    overflow: hidden;
}

.close-modal {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 30px;
    color: var(--text-color);
    cursor: pointer;
    z-index: 1;
}

.modal-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.modal-image {
    position: relative;
    height: 100%;
}

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

.modal-info {
    padding: 30px;
}

/* モーダル内の情報スタイル */
.modal-info .name {
    font-size: 2rem;
    margin-bottom: 10px;
}

.modal-info .nickname {
    font-size: 1.3rem;
    margin-bottom: 30px;
}

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

    .modal-image {
        height: 300px;
    }

    .modal-info {
        padding: 20px;
    }

    .modal-info .name {
        font-size: 1.5rem;
    }

    .modal-info .nickname {
        font-size: 1.1rem;
        margin-bottom: 20px;
    }
}

/* 既存のスタイルに追加 */
.view-more-btn {
    display: inline-block;
    padding: 8px 20px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.view-more-btn:hover {
    background-color: #a01830;
    transform: translateY(-2px);
}

.dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 10px;
    height: 10px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.3s;
}

.dot.active {
    opacity: 1;
}

.contact-form {
    padding: 120px 0 80px; /* 上部のパディングを増やして、ヘッダーとの距離を確保 */
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.contact-form .section-title {
    font-size: 2.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 50px;
    position: relative;
    color: #2d3436;
}

.contact-form .section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #007BFF;
}

.form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2d3436;
}

.required {
    color: #e74c3c;
    margin-left: 5px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #007BFF;
    box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
}

.form-button {
    text-align: center;
    margin-top: 40px;
}

.submit-button {
    display: inline-flex;
    align-items: center;
    padding: 15px 40px;
    background: #007BFF;
    color: #ffffff;
    border: none;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,123,255,0.3);
}

.submit-button:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,123,255,0.4);
}

.submit-button .arrow-icon {
    margin-left: 10px;
    transition: transform 0.3s ease;
}

.submit-button:hover .arrow-icon {
    transform: translateX(5px);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .contact-form {
        padding: 40px 0;
    }

    .form-wrapper {
        padding: 20px;
        margin: 0 15px;
    }

    .highlighted-text {
        font-weight: bolder;
        font-size: 1rem; /* フォントサイズを大きく */
        line-height: 1.3; /* 行間を広げて見やすく */
    }
}

/* About page styles */
.about-hero {
    height: 400px;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)),
                url('../image/about-bg.jpg') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 80px;
}

.hero-content {
    text-align: center;
    color: white;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: 4px;
}

.hero-content p {
    font-size: 1.2rem;
    letter-spacing: 2px;
}

/* 共通セクションスタイル */
.section-subtitle {
    display: block;
    text-align: center;
    color: var(--accent-color);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-color);
}

/* ミッションセクション */
.about-mission {
    padding: 100px 0;
    background: #f8f9fa;
}

.mission-content {
    max-width: 800px;
    margin: 0 auto;
}

.mission-text p {
    font-size: 1.1rem;
    line-height: 2;
    margin-bottom: 25px;
    color: #444;
}

/* ビジョンセクション */
.about-vision {
    padding: 100px 0;
    background: white;
}

.vision-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.vision-card {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    transition: transform 0.3s ease;
}

.vision-card:hover {
    transform: translateY(-10px);
}

.vision-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.vision-card h3 {
    color: var(--accent-color);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.vision-card p {
    font-size: 1.1rem;
    line-height: 1.8;
}

/* クラブ概要セクション */
.club-overview {
    padding: 100px 0;
    background: #f8f9fa;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.overview-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.overview-card h3 {
    color: var(--accent-color);
    font-size: 1.3rem;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.overview-card dl {
    display: grid;
    gap: 15px;
}

.overview-card dt {
    font-weight: 600;
    color: #444;
}

.overview-card dd {
    margin: 0;
    color: #666;
}

.activity-list,
.location-list {
    list-style: none;
    padding: 0;
}

.activity-list li,
.location-list li {
    margin-bottom: 15px;
    padding-left: 25px;
    position: relative;
}

.activity-list li::before,
.location-list li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 0.8rem;
}

/* 戦績セクション */
.achievements {
    padding: 100px 0;
    background: white;
}

.achievements-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.achievement-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease;
}

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

.achievement-year {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 15px;
}

.achievement-card h3 {
    font-size: 1.1rem;
    color: #444;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .about-hero {
        height: 300px;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .vision-content {
        grid-template-columns: 1fr;
    }

    .about-mission,
    .about-vision,
    .club-overview,
    .achievements {
        padding: 60px 0;
    }

    .overview-card {
        padding: 25px;
    }
}

/* Sponsor page styles */
.sponsor-hero {
    height: 400px;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)),
                url('../image/sponsor-bg.jpg') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 80px;
}

.sponsor-recruit {
    padding: 100px 0;
    background: #f8f9fa;
}

.recruit-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.recruit-content p {
    font-size: 1.2rem;
    line-height: 2;
    margin-bottom: 40px;
    color: #444;
}

.sponsor-contact-btn {
    display: inline-flex;
    align-items: center;
    padding: 20px 40px;
    background: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.sponsor-contact-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(196, 30, 58, 0.3);
}

.sponsor-contact-btn .arrow {
    margin-left: 10px;
    transition: transform 0.3s ease;
}

.sponsor-contact-btn:hover .arrow {
    transform: translateX(5px);
}

.current-sponsors {
    padding: 100px 0;
    background: white;
}

.sponsors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.sponsor-card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sponsor-card:hover {
    /* transform: translateY(-5px); */
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.sponsor-card img {
    max-width: 100%;
    height: auto;
    /* filter: grayscale(100%); */
    transition: filter 0.3s ease;
}

.sponsor-card:hover img {
    filter: grayscale(0%);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .sponsor-hero {
        height: 300px;
    }

    .sponsor-recruit,
    .current-sponsors {
        padding: 60px 0;
    }

    .recruit-content p {
        font-size: 1.1rem;
        padding: 0 20px;
    }

    .sponsor-contact-btn {
        padding: 15px 30px;
    }

    .sponsors-grid {
        gap: 20px;
        padding: 0 20px;
    }
}

/* 沿革セクション */
.history {
    padding: 60px 0;
    background-color: var(--light-gray);
}

.history .container {
    max-width: 800px;
    margin: 0 auto;
}

.history h2 {
    font-size: 2.5em;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
}

.history h3 {
    font-size: 1.8em;
    color: var(--accent-color);
    margin-top: 30px;
    margin-bottom: 20px;
}

.history p {
    font-size: 1.1em;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-color);
}

.history ul {
    list-style-type: disc;
    padding-left: 20px;
    margin-bottom: 20px;
}

.history ul li {
    margin-bottom: 10px;
    font-size: 1.1em;
    color: var(--text-color);
}

.lobster-regular {
    font-family: "Lobster", serif;
    font-weight: 400;
    font-style: normal;
  }

  .lavishly-yours-regular {
    font-family: "Lavishly Yours", cursive;
    font-weight: 400;
    font-style: normal;
  }
  
  .lavishly-yours-regular {
    font-family: "Lavishly Yours", cursive;
    font-weight: 400;
    font-style: normal;
  }