* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fafafa;  /* white → #fafafa に変更 */
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 30px;
}

h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 30px;
    font-size: 2em;
}

/* 目次スタイル */
.toc {
    background-color: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
}

.toc h2 {
    color: #495057;
    font-size: 1.3em;
    margin-bottom: 15px;
}

.toc ul {
    list-style: none;
}

.toc li {
    margin: 8px 0;
}

.toc a {
    color: #007bff;
    text-decoration: none;
    display: block;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.toc a:hover {
    background-color: #e9ecef;
    transform: translateX(5px);
}

/* アコーディオンスタイル */
.accordion {
    margin: 20px 0;
}

.accordion-item {
    border: 1px solid #dee2e6;
    border-radius: 8px;
    margin-bottom: 10px;
    overflow: hidden;
}

.accordion-header {
    background-color: #f8f9fa;
    padding: 15px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.accordion-header:hover {
    background-color: #e9ecef;
}

.accordion-header h3 {
    margin: 0;
    color: #495057;
    font-size: 1.2em;
}

.accordion-icon {
    font-size: 1.2em;
    transition: transform 0.3s ease;
}

.accordion-content {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background-color: #ffffff;  /* 追加：白い背景 */
}

.accordion-item.active .accordion-content {
    padding: 20px;
    max-height: 2000px;
    border-top: 1px solid #e9ecef;  /* 追加：上部に境界線 */
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.05);  /* 追加：内側に影 */
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

/* セクションスタイル */
.section {
    margin: 30px 0;
    scroll-margin-top: 20px;
}

.section h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e9ecef;
}

/* ステータス別のスタイル */
.status-win {
    background-color: #d4edda;
    border-left: 4px solid #28a745;
    padding: 15px;
    margin: 10px 0;
    border-radius: 4px;
}

.status-lose {
    background-color: #f8d7da;
    border-left: 4px solid #dc3545;
    padding: 15px;
    margin: 10px 0;
    border-radius: 4px;
}

.status-unknown {
    background-color: #d1ecf1;
    border-left: 4px solid #17a2b8;
    padding: 15px;
    margin: 10px 0;
    border-radius: 4px;
}

/* チェックリスト */
.checklist {
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.checklist h3 {
    color: #856404;
    margin-bottom: 15px;
}

.check-item {
    margin: 10px 0;
    padding: 10px;
    background-color: white;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* リストスタイル */
ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

li {
    margin: 5px 0;
}

/* 強調テキスト */
.highlight {
    background-color: #ffeaa7;
    padding: 2px 5px;
    border-radius: 3px;
    font-weight: bold;
}

/* NG行動 */
.ng-actions {
    background-color: #ffe0e0;
    border: 2px solid #ff6b6b;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.ng-actions h3 {
    color: #c92a2a;
    margin-bottom: 10px;
}

.ng-actions li {
    color: #c92a2a;
    margin: 8px 0;
}

/* トップへ戻るボタン */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #007bff;
    color: white;
    padding: 10px 15px;
    border-radius: 50%;
    text-decoration: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    cursor: pointer;
}

.back-to-top.show {
    opacity: 1;
}

.back-to-top:hover {
    background-color: #0056b3;
}

/* レスポンシブデザイン */
@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
    
    h1 {
        font-size: 1.5em;
    }
    
    .accordion-header h3 {
        font-size: 1em;
    }
}