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

/* ベーススタイル */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
    color: #333;
    background-color: #ffffff;
    line-height: 1.8;
}

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

/* ヒーローセクション */
.hero {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: 60px 0 80px;
    text-align: center;
}

.hero-subtitle-top {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 20px;
    font-weight: 500;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 30px;
    line-height: 1.4;
}

.hero-concept {
    margin: 30px auto;
    max-width: 700px;
}

.hero-concept p {
    font-size: 1.15rem;
    color: #2c3e50;
    margin-bottom: 8px;
    line-height: 1.7;
    font-weight: 500;
}

.hero-description {
    margin: 30px auto 40px;
    max-width: 700px;
    font-size: 1.05rem;
    color: #555;
    line-height: 1.9;
}

/* ヘッダー画像 */
.header-image {
    margin: 30px auto 40px;
    max-width: 900px;
}

.main-header-image {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* プロフィール画像（旧スタイル - 念のため残す） */
.profile-images {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 60px;
    margin: 50px 0;
}

.profile-item {
    text-align: center;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #e0e0e0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.profile-name {
    margin-top: 15px;
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
}

/* CTAボタン */
.cta-button {
    display: inline-block;
    background-color: #2c3e50;
    color: #ffffff;
    padding: 16px 45px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(44, 62, 80, 0.2);
}

.cta-button:hover {
    background-color: #34495e;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(44, 62, 80, 0.3);
}

.cta-button.large {
    padding: 20px 60px;
    font-size: 1.3rem;
}

/* セクション共通スタイル */
section {
    padding: 80px 0;
}

section:nth-child(even) {
    background-color: #fafafa;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 50px;
}

/* コンセプトセクション */
.concept-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 2;
}

.concept-content p {
    margin-bottom: 20px;
    color: #555;
}

.concept-content ul {
    margin: 20px 0 20px 40px;
}

.concept-content li {
    margin-bottom: 10px;
    color: #555;
}

/* メッセージセクション */
.message-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 2;
}

.message-content p {
    margin-bottom: 20px;
    color: #555;
}

.message-content ul {
    margin: 20px 0 20px 40px;
}

.message-content li {
    margin-bottom: 10px;
    color: #555;
    font-weight: 500;
}

.quote-box {
    background-color: #f0f4f8;
    border-left: 4px solid #2c3e50;
    padding: 25px;
    margin: 30px 0;
    border-radius: 5px;
}

.quote-box p {
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 500;
}

.quote-box p:last-child {
    margin-bottom: 0;
}

.highlight-box {
    background-color: #fff9e6;
    border: 2px solid #ffd700;
    padding: 20px;
    border-radius: 8px;
    margin: 30px 0;
    font-weight: 600;
    text-align: center;
    color: #2c3e50;
}

/* Aboutセクション */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 2;
}

.about-content p {
    margin-bottom: 20px;
    color: #555;
}

.about-content ul {
    margin: 20px 0 20px 40px;
}

.about-content li {
    margin-bottom: 10px;
    color: #555;
}

/* Targetセクション */
.target-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 2;
}

.target-content p {
    margin-bottom: 20px;
    color: #555;
}

.target-content ul {
    margin: 20px 0 20px 40px;
}

.target-content li {
    margin-bottom: 10px;
    color: #555;
}

.target-guideline {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    margin: 40px 0;
}

.notice-box {
    background-color: #fff3cd;
    border: 2px solid #ffc107;
    padding: 25px;
    margin: 30px 0;
    border-radius: 8px;
}

.notice-box p {
    color: #856404;
    margin-bottom: 15px;
    line-height: 1.8;
}

.notice-box p:last-child {
    margin-bottom: 0;
}

/* 開催詳細セクション */
.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.detail-item {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.detail-item h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.detail-item p {
    color: #555;
    line-height: 1.8;
}

.note {
    font-size: 0.9rem;
    color: #777;
    margin-top: 10px;
}

/* CTAセクション */
.cta {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    text-align: center;
}

.cta-text {
    font-size: 1.2rem;
    color: #555;
    margin-bottom: 40px;
    line-height: 2;
}

.signature {
    margin-top: 30px;
    font-size: 1.3rem;
    font-weight: 600;
    color: #2c3e50;
}

/* フッター */
.footer {
    background-color: #2c3e50;
    color: #ffffff;
    text-align: center;
    padding: 30px 0;
}

.footer p {
    margin: 0;
}

/* レスポンシブデザイン：タブレット */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-concept {
        font-size: 1.1rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .profile-images {
        gap: 40px;
    }
    
    .profile-image {
        width: 180px;
        height: 180px;
    }
    
    .header-image {
        margin: 40px auto 30px;
        max-width: 100%;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .details-grid {
        grid-template-columns: 1fr;
    }
}

/* レスポンシブデザイン：スマートフォン */
@media (max-width: 480px) {
    .hero {
        padding: 60px 0 50px;
    }
    
    .hero-title {
        font-size: 1.6rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }
    
    .hero-concept {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 0.95rem;
    }
    
    .profile-images {
        flex-direction: column;
        gap: 30px;
        margin: 35px 0;
    }
    
    .profile-image {
        width: 150px;
        height: 150px;
    }
    
    .header-image {
        margin: 30px auto 25px;
        max-width: 100%;
    }
    
    .cta-button {
        padding: 14px 35px;
        font-size: 1rem;
    }
    
    .cta-button.large {
        padding: 16px 40px;
        font-size: 1.1rem;
    }
    
    section {
        padding: 50px 0;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}