/* ================================================
   リセットとベーススタイル
================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* カラーパレット - 鳥取城北高校同窓会カラー（学校の赤×同窓会の紺・金） */
    --primary-color: #1a3a6b;        /* 深い紺色（メインカラー） */
    --secondary-color: #c9a961;      /* 金色（アクセント） */
    --accent-color: #a8142f;         /* 学校のエンジ色（ロゴカラー） */
    --text-color: #333;
    --text-light: #666;
    --bg-light: #faf8f5;             /* 暖かみのあるアイボリー系 */
    --bg-white: #ffffff;
    --border-color: #d4c5a9;         /* 金色系のボーダー */

    /* グラデーション - 赤×紺×金のミックス */
    --gradient-primary: linear-gradient(135deg, #a8142f 0%, #1a3a6b 100%);
    --gradient-secondary: linear-gradient(135deg, #c9a961 0%, #d4b976 100%);
    --gradient-accent: linear-gradient(135deg, #a8142f 0%, #c92a44 100%);

    /* シャドウ */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);

    /* トランジション */
    --transition: all 0.3s ease;

    /* フォント */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-color);
    line-height: 1.8;
    background-color: var(--bg-white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ================================================
   コンテナ
================================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ================================================
   ヘッダー
================================================ */
.header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-image {
    height: 70px;
    width: auto;
    object-fit: contain;
}

.logo-text h1 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.3;
}

.logo-text .subtitle {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}

.nav-list {
    display: flex;
    gap: 2rem;
}

.nav-list a {
    font-weight: 500;
    color: var(--text-color);
    position: relative;
    padding: 0.5rem 0;
}

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

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

.nav-list a:hover {
    color: var(--secondary-color);
}

/* ================================================
   ヒーローセクション
================================================ */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--bg-white);
    text-align: center;
    padding: 4rem 2rem;
}

/* スライドショー背景 */
.hero-slideshow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    animation: slideshow 45s infinite;
}

.hero-slide:nth-child(1) { animation-delay: 0s; }
.hero-slide:nth-child(2) { animation-delay: 5s; }
.hero-slide:nth-child(3) { animation-delay: 10s; }
.hero-slide:nth-child(4) { animation-delay: 15s; }
.hero-slide:nth-child(5) { animation-delay: 20s; }
.hero-slide:nth-child(6) { animation-delay: 25s; }
.hero-slide:nth-child(7) { animation-delay: 30s; }
.hero-slide:nth-child(8) { animation-delay: 35s; }
.hero-slide:nth-child(9) { animation-delay: 40s; }

@keyframes slideshow {
    0% { opacity: 0; }
    2% { opacity: 1; }
    11% { opacity: 1; }
    13% { opacity: 0; }
    100% { opacity: 0; }
}

/* 文字の視認性を確保するためのオーバーレイ */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    line-height: 1.4;
    text-shadow: 0 3px 15px rgba(0,0,0,0.5), 0 1px 3px rgba(0,0,0,0.8);
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    line-height: 1.8;
    text-shadow: 0 2px 8px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.6);
}

.hero-description p {
    text-shadow: 0 2px 8px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.6);
}

.hero-highlight {
    font-size: 1.3rem;
    font-weight: 600;
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    backdrop-filter: blur(10px);
    text-shadow: 0 2px 10px rgba(0,0,0,0.5), 0 1px 3px rgba(0,0,0,0.7);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

/* ================================================
   ボタン
================================================ */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--bg-white);
    color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: var(--bg-light);
}

.btn-large {
    padding: 1.2rem 3rem;
    font-size: 1.1rem;
    background: var(--accent-color);
    color: var(--bg-white);
    box-shadow: var(--shadow-lg);
}

.btn-large:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: #8b0d26;
}

/* ================================================
   セクション共通
================================================ */
.section {
    padding: 5rem 0;
}

.section:nth-child(even) {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 2px;
}

.section-lead {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ================================================
   東京支部について
================================================ */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.about-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-weight: 700;
}

.about-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ================================================
   会員制度
================================================ */
.section-membership {
    background: linear-gradient(to bottom, var(--bg-white) 0%, var(--bg-light) 100%);
}

.membership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.membership-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.membership-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.membership-header {
    padding: 2rem;
    text-align: center;
    color: var(--bg-white);
    font-weight: 700;
}

.membership-header-regular {
    background: var(--accent-color);
}

.membership-header-associate {
    background: var(--primary-color);
}

.membership-header-sponsor {
    background: var(--secondary-color);
}

.membership-header h3 {
    font-size: 1.8rem;
}

.membership-body {
    padding: 2rem;
}

.membership-target {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-light);
    border-radius: 8px;
    font-size: 0.95rem;
}

.membership-fee {
    margin-bottom: 1.5rem;
}

.fee-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.fee-item:last-child {
    border-bottom: none;
}

.fee-label {
    font-weight: 600;
    color: var(--text-color);
}

.fee-amount {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.membership-note {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
}

.membership-info {
    margin-top: 4rem;
    padding: 2.5rem;
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.membership-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.membership-info p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ================================================
   活動予定
================================================ */
.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.activity-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
}

.activity-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    background: var(--bg-light);
}

.activity-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.activity-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-weight: 700;
}

.activity-card p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 0.95rem;
}

.event-info {
    margin-top: 4rem;
    padding: 3rem;
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border-left: 5px solid;
    border-image: var(--gradient-primary) 1;
}

.event-info h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-weight: 700;
}

.event-details {
    margin-bottom: 2rem;
}

.event-detail-item {
    display: flex;
    padding: 1.2rem;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
}

.event-detail-item:last-child {
    border-bottom: none;
}

.detail-label {
    font-weight: 700;
    color: var(--primary-color);
    min-width: 120px;
    flex-shrink: 0;
}

.detail-value {
    color: var(--text-color);
    flex: 1;
}

.event-note {
    color: var(--text-light);
    font-style: italic;
    font-size: 0.95rem;
}

/* ================================================
   お問い合わせ・会員登録
================================================ */
.section-contact {
    background: linear-gradient(to bottom, var(--bg-light) 0%, var(--bg-white) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.contact-form-wrapper,
.contact-info-wrapper {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.form-notice {
    margin-bottom: 2rem;
}

.form-notice h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.form-notice ol {
    list-style: decimal;
    list-style-position: inside;
    color: var(--text-light);
    line-height: 2;
}

.form-notice ol li {
    margin-bottom: 0.5rem;
}

.form-note {
    text-align: center;
    margin-top: 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

.contact-info-wrapper h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.sns-links {
    margin-bottom: 1.5rem;
}

.sns-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem;
    border-radius: 12px;
    background-color: var(--bg-light);
    transition: var(--transition);
    font-weight: 600;
}

.sns-link:hover {
    transform: translateX(8px);
    color: var(--bg-white);
}

.sns-facebook:hover {
    background: #3b5998;
}

.sns-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-white);
    border-radius: 50%;
    font-weight: 700;
    color: var(--primary-color);
}

.sns-note {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ================================================
   フッター
================================================ */
.footer {
    background: var(--primary-color);
    color: var(--bg-white);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.footer-section p {
    line-height: 1.8;
    opacity: 0.9;
}

.footer-section ul {
    list-style: disc;
    list-style-position: inside;
    opacity: 0.9;
    line-height: 1.8;
}

.footer-section .small {
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.footer-section-left {
    flex: 0 0 auto;
}

.footer-section-right {
    flex: 0 0 auto;
    text-align: right;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.footer-link {
    display: inline-block;
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.3rem 0;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    width: fit-content;
}

.footer-link:hover {
    border-bottom-color: var(--secondary-color);
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
    font-size: 0.9rem;
}

/* ================================================
   準会員募集バナー
================================================ */
.associate-member-banner {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    padding: 2rem 0;
    color: var(--bg-white);
}

.banner-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.banner-icon {
    font-size: 4rem;
    flex-shrink: 0;
}

.banner-text {
    flex: 1;
}

.banner-text h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.banner-text p {
    font-size: 1.1rem;
    line-height: 1.6;
}

.banner-text strong {
    color: var(--secondary-color);
    font-size: 1.3rem;
}

.banner-cta {
    flex-shrink: 0;
}

.btn-banner {
    background: var(--bg-white);
    color: var(--accent-color);
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 50px;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-banner:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

/* ================================================
   準会員募集セクション
================================================ */
.section-associate-welcome {
    background: var(--bg-light);
}

.associate-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.benefit-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.benefit-card p {
    color: var(--text-color);
    line-height: 1.8;
}

/* FAQ */
.associate-faq {
    margin: 4rem 0;
    padding: 3rem;
    background: var(--bg-white);
    border-radius: 12px;
}

.faq-title {
    text-align: center;
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 2rem;
    font-weight: 700;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.faq-item {
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.faq-item h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    font-weight: 700;
}

.faq-item p {
    color: var(--text-color);
    line-height: 1.8;
}

/* CTA */
.associate-cta {
    text-align: center;
    margin-top: 3rem;
}

.cta-note {
    margin-top: 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ================================================
   会員登録・退会ページ
================================================ */
.register-content {
    max-width: 700px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.register-intro {
    text-align: left;
    margin-bottom: 3rem;
    line-height: 1.8;
}

.register-intro p {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.register-privacy-link {
    font-size: 0.9rem;
    color: var(--text-light);
}

.register-privacy-link a {
    color: var(--accent-color);
    text-decoration: underline;
    font-weight: 600;
}

.register-form {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 2rem;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

/* 会員区分選択 */
.member-type-selection {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.member-type-option {
    cursor: pointer;
}

.member-type-option input[type="radio"] {
    display: none;
}

.member-type-card {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: var(--transition);
    background: var(--bg-white);
}

.member-type-card h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.member-type-card p {
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 0.8rem;
}

.member-type-badge {
    display: inline-block;
    background: var(--bg-light);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
}

.member-type-fee-detail {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.member-type-note {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

.member-type-option input[type="radio"]:checked + .member-type-card {
    border-color: var(--accent-color);
    background: rgba(168, 20, 47, 0.05);
    box-shadow: 0 0 0 3px rgba(168, 20, 47, 0.1);
}

.member-type-option input[type="radio"]:checked + .member-type-card h4 {
    color: var(--accent-color);
}

.member-type-option input[type="radio"]:checked + .member-type-card .member-type-badge {
    background: var(--accent-color);
    color: var(--bg-white);
}

.member-type-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.form-label.required::after {
    content: ' *';
    color: var(--accent-color);
    font-weight: 700;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(168, 20, 47, 0.1);
}

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

.form-note {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 0.5rem;
    font-style: italic;
}

.form-agreement {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 8px;
    border: 2px solid var(--border-color);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
    font-size: 1rem;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.checkbox-label a {
    color: var(--accent-color);
    text-decoration: underline;
    font-weight: 600;
}

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

.btn-large {
    padding: 1rem 3rem;
    font-size: 1.1rem;
}

.btn-small {
    padding: 0.6rem 2rem;
    font-size: 0.95rem;
}

.form-message {
    margin-top: 2rem;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
}

.form-message-success {
    background: #d4edda;
    color: #155724;
    border: 2px solid #c3e6cb;
}

.form-message-error {
    background: #f8d7da;
    color: #721c24;
    border: 2px solid #f5c6cb;
}

/* 退会セクション */
.section-withdrawal {
    background: var(--bg-light);
    padding: 3rem 0;
}

.withdrawal-content {
    max-width: 500px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.withdrawal-title {
    font-size: 1.3rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 2rem;
    font-weight: 600;
}

.withdrawal-form {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.form-input-small {
    font-size: 0.95rem;
}

.form-textarea-small {
    min-height: 80px;
    font-size: 0.95rem;
}

/* ================================================
   個人情報ページ
================================================ */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
    line-height: 1.8;
}

.privacy-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    line-height: 2;
}

.privacy-section {
    margin-bottom: 2.5rem;
}

.privacy-section h3 {
    color: var(--primary-color);
    font-size: 1.4rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}

.privacy-section p {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.privacy-section ul {
    margin: 1rem 0 1rem 2rem;
    list-style-type: disc;
}

.privacy-section ul li {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.privacy-note {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
}

.privacy-important {
    font-weight: 600;
    color: var(--accent-color);
    margin-top: 1.5rem;
}

.privacy-important-box {
    background: var(--bg-light);
    border: 2px solid var(--accent-color);
    border-radius: 8px;
    padding: 2rem;
    margin: 3rem 0;
}

.privacy-important-box h3 {
    color: var(--accent-color);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.privacy-important-box p {
    color: var(--text-color);
    line-height: 1.8;
}

.privacy-divider {
    border-top: 1px solid var(--border-color);
    margin: 2.5rem 0;
}

.privacy-link {
    color: var(--accent-color);
    text-decoration: underline;
    font-weight: 600;
}

.privacy-link:hover {
    color: var(--primary-color);
}

.privacy-back {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

/* ================================================
   レスポンシブデザイン
================================================ */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-list {
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: center;
    }

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
    }

    .footer-section-right {
        text-align: left;
    }

    .logo-text h1 {
        font-size: 1rem;
    }

    .logo-text .subtitle {
        font-size: 0.8rem;
    }

    .hero {
        min-height: 500px;
        padding: 3rem 1.5rem;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-highlight {
        font-size: 1.1rem;
    }

    .section {
        padding: 3rem 0;
    }

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

    .about-grid,
    .membership-grid,
    .activities-grid {
        grid-template-columns: 1fr;
    }

    .banner-content {
        flex-direction: column;
        text-align: center;
    }

    .banner-icon {
        font-size: 3rem;
    }

    .banner-text h3 {
        font-size: 1.5rem;
    }

    .banner-text p {
        font-size: 1rem;
    }

    .banner-text strong {
        font-size: 1.1rem;
    }

    .associate-benefits {
        grid-template-columns: 1fr;
    }

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

    .associate-faq {
        padding: 2rem 1rem;
    }

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

    .event-detail-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .detail-label {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .logo-image {
        height: 50px;
        width: auto;
    }

    .nav-list {
        gap: 0.8rem;
        font-size: 0.9rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .btn {
        padding: 0.8rem 2rem;
        font-size: 0.95rem;
    }

    .btn-large {
        padding: 1rem 2.5rem;
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .about-card,
    .activity-card,
    .membership-body,
    .contact-form-wrapper,
    .contact-info-wrapper {
        padding: 1.5rem;
    }

    .event-info {
        padding: 2rem;
    }
}

/* ================================================
   アニメーション
================================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

/* スムーススクロール */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

/* ================================================
   応援メンバー・賛助会員ページ
================================================ */

/* ページ導入 */
.supporters-intro {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 3rem;
    text-align: center;
}

.supporters-intro p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.supporters-intro p:last-child {
    margin-bottom: 0;
}

/* セクション共通 */
.supporters-section {
    margin-bottom: 4rem;
}

.supporters-section-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    border-bottom: 3px solid var(--secondary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.supporters-section-note {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.supporters-note {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 1.5rem;
    text-align: center;
}

/* 賛助会員（企業・団体）グリッド */
.sponsor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.sponsor-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    display: block;
}

.sponsor-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--accent-color);
}

.sponsor-banner {
    text-align: center;
}

.sponsor-logo-placeholder {
    width: 100%;
    height: 120px;
    background-color: var(--bg-light);
    border: 2px dashed var(--border-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

.sponsor-logo {
    width: 100%;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    background-color: var(--bg-white);
    border-radius: 4px;
    padding: 1rem;
}

.sponsor-logo img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.sponsor-logo-dark {
    background-color: #000000;
}

.sponsor-banner h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.sponsor-category {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 応援メンバー（個人）リスト */
.individual-supporters {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
}

.supporters-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.supporters-list li {
    padding: 0.8rem 1rem;
    background-color: var(--bg-white);
    border-left: 3px solid var(--secondary-color);
    border-radius: 4px;
}

/* 賛助会員について */
.sponsor-info {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
}

.sponsor-info p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.sponsor-benefits {
    list-style: none;
    margin: 1.5rem 0;
    padding-left: 1rem;
}

.sponsor-benefits li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.sponsor-benefits li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.sponsor-fee-note {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.text-link {
    color: var(--primary-color);
    text-decoration: underline;
}

.text-link:hover {
    color: var(--accent-color);
}

/* 掲載ルール */
.supporters-rules {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
}

.rules-list {
    list-style: none;
    padding-left: 0;
}

.rules-list li {
    padding: 0.8rem 0;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.8;
}

.rules-list li:before {
    content: "●";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
}

/* CTA（行動導線） */
.supporters-cta {
    margin: 3rem 0;
}

.cta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.cta-single {
    max-width: 600px;
    margin: 0 auto;
}

.cta-card {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    border: 2px solid var(--border-color);
}

.cta-card h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.cta-card p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.cta-card .btn {
    width: 100%;
    max-width: 300px;
}

/* 戻るボタン */
.supporters-back {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 0.8rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--bg-white);
}

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

    .supporters-list {
        grid-template-columns: 1fr;
    }

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

    .supporters-section-title {
        font-size: 1.5rem;
    }
}

/* ================================================
   卒業生の活躍と部活動の実績ページ
================================================ */

/* ページ導入 */
.achievements-intro {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 3rem;
    text-align: center;
}

.achievements-intro p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.achievements-intro p:last-child {
    margin-bottom: 0;
}

/* セクション共通 */
.achievements-section {
    margin-bottom: 4rem;
}

.achievements-section-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    border-bottom: 3px solid var(--secondary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.achievements-section-note {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.achievements-note {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 1.5rem;
    text-align: center;
}

/* 年度タブ */
.year-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.year-tab {
    padding: 0.8rem 1.5rem;
    background-color: var(--bg-light);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.year-tab:hover {
    background-color: rgba(201, 169, 97, 0.2);
    border-color: var(--secondary-color);
}

.year-tab.active {
    background-color: var(--primary-color);
    color: var(--bg-white);
    border-color: var(--primary-color);
}

/* 年度別コンテンツ */
.year-content {
    display: none;
}

.year-content.active {
    display: block;
}

/* 部活動実績リスト */
.club-results-list {
    list-style: none;
    padding: 0;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
}

.club-results-list li {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--bg-light);
    line-height: 1.8;
    color: var(--text-color);
}

.club-results-list li:last-child {
    border-bottom: none;
}

.club-results-list li strong {
    color: var(--primary-color);
    font-weight: 700;
}

/* 著名な卒業生グリッド */
.alumni-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.alumni-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: var(--transition);
}

.alumni-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.alumni-category {
    display: inline-block;
    background-color: var(--secondary-color);
    color: var(--bg-white);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.alumni-name {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.alumni-profile {
    font-size: 1rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.alumni-description {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* コンパクトな卒業生カード */
.alumni-grid-compact {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.2rem;
}

.alumni-card-compact {
    padding: 1rem;
}

.alumni-card-compact .alumni-category {
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    margin-bottom: 0.6rem;
}

.alumni-card-compact .alumni-name {
    font-size: 1rem;
    margin-bottom: 0.3rem;
}

.alumni-card-compact .alumni-profile {
    font-size: 0.85rem;
    margin-bottom: 0;
}

/* 分野別卒業生カード */
.alumni-by-field {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.field-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: var(--transition);
}

.field-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--secondary-color);
}

.field-title {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    padding-bottom: 0.8rem;
    border-bottom: 2px solid var(--bg-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.field-alumni-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

/* 大相撲など項目が多い場合は2カラム表示 */
.field-alumni-list.two-columns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem 1rem;
}

.field-alumni-list li {
    padding: 0.6rem 0.8rem;
    background-color: var(--bg-light);
    border-radius: 4px;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-color);
    transition: var(--transition);
}

.field-alumni-list li:hover {
    background-color: rgba(201, 169, 97, 0.15);
    transform: translateX(4px);
}

.field-alumni-list .name {
    font-weight: 700;
    color: var(--primary-color);
    margin-right: 0.5rem;
    font-size: 1rem;
}

/* 部活動の実績 */
.club-achievements {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.club-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: var(--transition);
}

.club-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--accent-color);
}

.club-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bg-light);
}

.club-icon {
    font-size: 2rem;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-light);
    border-radius: 50%;
}

.club-header h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
}

.club-results {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.result-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    padding: 0.8rem;
    background-color: var(--bg-light);
    border-radius: 4px;
}

.result-year {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 600;
}

.result-achievement {
    font-size: 0.95rem;
    color: var(--text-color);
    line-height: 1.6;
}

/* 応援メッセージ */
.support-message {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: var(--bg-white);
    padding: 3rem 2rem;
    border-radius: 8px;
    text-align: center;
}

.support-message h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.support-message p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.support-message .btn {
    background-color: var(--bg-white);
    color: var(--primary-color);
    border: none;
}

.support-message .btn:hover {
    background-color: var(--bg-light);
}

/* 戻るボタン */
.achievements-back {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

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

    .alumni-grid-compact {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .alumni-by-field {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .field-alumni-list.two-columns {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }

    .club-achievements {
        grid-template-columns: 1fr;
    }

    .achievements-section-title {
        font-size: 1.5rem;
    }

    .year-tabs {
        gap: 0.4rem;
    }

    .year-tab {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

    .club-results-list {
        padding: 1.5rem;
    }

    .club-results-list li {
        padding: 0.6rem 0;
        font-size: 0.9rem;
    }

    .support-message {
        padding: 2rem 1.5rem;
    }

    .support-message h3 {
        font-size: 1.5rem;
    }

    .support-message p {
        font-size: 1rem;
    }
}