/* 基本設定 */
body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: #333;
    margin: 0;
    background-color: #f2f4f6;
}

.container {
    max-width: 850px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: #004080;
    text-decoration: none;
    transition: 0.2s;
}

a:hover {
    text-decoration: underline;
}

/* ヘッダー */
header {
    background-color: #fff;
    border-bottom: 2px solid #001f3f;
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
    font-size: 1.1rem;
}

header h1 a {
    color: #001f3f;
}

nav ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin-left: 15px;
}

nav ul li a {
    font-size: 0.85rem;
    font-weight: bold;
    color: #555;
}

/* ヒーローセクション */
.hero {
    background-color: #001f3f; 
    color: #ffffff;
    padding: 35px 0;
    text-align: center;
}

.hero-title {
    color: #ffffff !important;
    font-size: 1.4rem;
    margin: 0 0 8px 0;
    padding: 0;
    border: none;
    text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.hero-text {
    color: #ffffff !important;
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.95;
}

/* コンテンツ */
.content-section {
    background: #fff;
    padding: 25px 35px;
    margin: 15px 0;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

h2 {
    border-left: 4px solid #001f3f;
    padding-left: 12px;
    margin-bottom: 15px;
    font-size: 1.25rem;
    color: #001f3f;
}

/* 交流の場セクション（フォームリンク版） */
.platform-box {
    background: #f8f9fa;
    padding: 25px;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    margin-top: 25px;
}

.platform-box h3 {
    margin: 0 0 10px 0;
    font-size: 1.1rem;
}

.join-info p {
    margin: 0 0 15px 0;
    font-size: 0.9rem;
}

.form-link-area {
    background: #fff;
    border: 1px solid #e9ecef;
    padding: 20px;
    text-align: center;
    border-radius: 4px;
}

.form-btn {
    display: inline-block;
    background: #001f3f;
    color: #fff !important;
    padding: 10px 25px;
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.95rem;
    margin-bottom: 10px;
    text-decoration: none !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.form-btn:hover {
    background: #004080;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.form-details {
    display: block;
    font-size: 0.75rem !important;
    color: #777;
    margin: 0 !important;
}

/* リストスタイル */
.list-unstyled {
    list-style: none;
    padding: 0;
    margin: 0;
}

.list-unstyled li {
    padding: 6px 0;
    border-bottom: 1px dotted #ddd;
}

.date {
    font-size: 0.8rem;
    margin-right: 10px;
    color: #666;
    font-weight: bold;
}

.standard-list, .link-list {
    padding-left: 18px;
    margin: 0;
}

.standard-list li, .link-list li {
    margin-bottom: 6px;
    font-size: 0.95rem;
}

.link-list {
    list-style-type: square;
}

/* フッター */
footer {
    text-align: center;
    padding: 20px 0;
    color: #999;
    font-size: 0.75rem;
}

/* レスポンシブ */
@media (max-width: 600px) {
    header .container {
        flex-direction: column;
    }
    nav ul {
        margin-top: 10px;
    }
    .hero-title {
        font-size: 1.2rem;
    }
    .content-section {
        padding: 20px;
    }
}
/* --- 趣旨説明ページ用追加デザイン --- */

/* 趣旨説明の記事エリア */
.concept-article {
    background: #fff;
    padding: 50px 60px;
    margin: 30px 0;
    line-height: 1.8;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    font-family: 'Noto Serif JP', serif;
    color: #222;
}

.concept-title {
    text-align: center;
    border: none;
    padding: 0;
    font-size: 1.8rem;
    margin-bottom: 40px;
    color: #001f3f;
    font-family: 'Noto Sans JP', sans-serif;
}

.concept-article h3 {
    font-family: 'Noto Sans JP', sans-serif;
    border-left: 4px solid #001f3f;
    padding-left: 12px;
    margin-top: 40px;
    font-size: 1.25rem;
    color: #001f3f;
}

.concept-hr {
    border: 0;
    border-top: 1px solid #eee;
    margin: 40px 0;
}

/* 発起人リスト：1カラムに変更 */
.founder-list {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.founder-list li {
    font-size: 0.95rem;
    padding: 8px 0;
    border-bottom: 1px solid #f5f5f5;
    font-family: 'Noto Sans JP', sans-serif; /* 氏名はゴシック系で見やすく */
}

/* リンクのデザイン */
.concept-link-area {
    margin-top: 15px;
}

.more-link {
    font-weight: bold;
    color: #004080;
    font-size: 0.95rem;
    border-bottom: 1px solid #004080;
    padding-bottom: 2px;
}

.more-link:hover {
    color: #d9534f;
    border-bottom-color: #d9534f;
    text-decoration: none;
}

.back-home {
    margin-top: 50px;
    text-align: center;
}

.btn-outline {
    display: inline-block;
    border: 2px solid #001f3f;
    color: #001f3f;
    padding: 10px 30px;
    border-radius: 4px;
    font-weight: bold;
    font-family: 'Noto Sans JP', sans-serif;
}

.btn-outline:hover {
    background: #001f3f;
    color: #fff;
    text-decoration: none;
}

/* レスポンシブ調整 */
@media (max-width: 600px) {
    .concept-article {
        padding: 30px 20px;
    }
    .founder-list {
        grid-template-columns: 1fr;
    }
}

/* トップページのリンクエリア */
.concept-link-area {
    margin-top: 20px;
    padding: 10px;
    background: #fdfdfd;
    border-radius: 4px;
}

.more-link {
    display: inline-block;
    font-weight: bold;
    color: #004080;
    font-size: 0.95rem;
    transition: 0.3s;
    border-bottom: 1px solid transparent;
}

.more-link:hover {
    color: #d9534f;
    border-bottom: 1px solid #d9534f;
    text-decoration: none;
}

.back-home {
    margin-top: 50px;
    text-align: center;
}

.btn-outline {
    display: inline-block;
    border: 2px solid #001f3f;
    color: #001f3f;
    padding: 10px 40px;
    border-radius: 4px;
    font-weight: bold;
    font-family: 'Noto Sans JP', sans-serif;
    transition: 0.3s;
}

.btn-outline:hover {
    background: #001f3f;
    color: #fff;
    text-decoration: none;
}

@media (max-width: 600px) {
    .concept-article {
        padding: 30px 20px;
    }
}
/* 準備中リボンのスタイル（修正版） */
/*
body::before {
    content: "PRE-OPEN / 準備中";
    position: fixed;
    top: 25px;
    right: -70px;
    transform: rotate(45deg);
    width: 350px;
    background-color: rgba(217, 83, 79, 0.95);
    color: white;
    text-align: center;
    line-height: 45px;
    font-size: 1rem;
    font-weight: bold;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    pointer-events: none;
    padding-left: 20px;
}
*/
/* アーカイブページ用のスタイル */
.archive-year {
    margin-bottom: 30px;
}

.archive-year h3 {
    font-size: 1.1rem;
    color: #001f3f;
    border-bottom: 1px solid #eee;
    padding-bottom: 5px;
    margin-bottom: 10px;
}

.archive-link-area {
    margin-top: 15px;
    text-align: right; /* 右寄せにすることで「次へ」のニュアンスを出す */
}