/* 基本設定 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
    line-height: 1.6;
    margin: 0;
    background-color: #f4f7f6;
    color: #333;
    -webkit-text-size-adjust: 100%;
}

/* ヘッダー */
.header {
    background-color: #fff;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #3cb371;
    text-align: center;
    margin: 0 0 1rem;
}
.logo a {
    color: #3cb371;
}

/* 検索窓 */
.search-container {
    display: flex;
    gap: 0.5rem;
}

#search-input {
    flex-grow: 1;
    padding: 0.8rem;
    font-size: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
}

#search-button {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    background-color: #3cb371;
    color: #fff;
    cursor: pointer;
}

/* メインコンテンツ */
.main-content {
    padding: 1rem;
}

h2 {
    font-size: 1.2rem;
    color: #333;
    border-left: 4px solid #3cb371;
    padding-left: 0.5rem;
}

/* カテゴリリスト */
.categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.category-item {
    background-color: #e8f5e9;
    color: #3cb371;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.category-item:hover {
    background-color: #d1e7d8;
}

/* 記事リスト */
#article-results {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
}

.article-item {
    background-color: #fff;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.article-item h3 {
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
}

.article-item h3 a {
    text-decoration: none;
    color: #333;
}

.article-item p {
    margin: 0;
    font-size: 0.9rem;
    color: #666;
}

/* 記事詳細 */
.article-detail {
    background-color: #fff;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.article-detail h2 {
    border-left: none;
    padding-left: 0;
    font-size: 1.5rem;
}

.article-meta {
    font-size: 0.8rem;
    color: #999;
}

.article-content {
    margin-top: 1rem;
}

/* フッター */
.footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.8rem;
    color: #999;
}