/* 基本設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f0f4f0; /* 薄い緑 */
}

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

/* ヘッダー */
header {
    background-color: #2e7d32;
    color: #fff;
    padding: 20px 0;
    text-align: center;
}

header h1 {
    font-size: 1.8rem;
    letter-spacing: 2px;
}

/* ヒーローエリア */
.hero {
    background-color: #fff;
    padding: 40px 0;
    text-align: center;
    border-bottom: 2px solid #e0e0e0;
    margin-bottom: 40px;
}

.hero h2 {
    color: #2e7d32;
    font-size: 2rem;
}

.hero h2 span {
    font-size: 1.2rem;
    color: #666;
    display: block;
    margin-top: 10px;
}

/* 記事グリッド */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 60px;
}

/* 記事カード */
.article-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
    transition: transform 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px);
}

.article-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.article-card .content {
    padding: 20px;
}

.category {
    display: inline-block;
    background-color: #e8f5e9;
    color: #2e7d32;
    font-size: 0.75rem;
    font-weight: bold;
    padding: 2px 10px;
    border-radius: 4px;
    margin-bottom: 10px;
}

.article-card h3 {
    font-size: 1.15rem;
    color: #1b5e20;
    margin-bottom: 10px;
    line-height: 1.4;
}

.article-card p {
    font-size: 0.9rem;
    color: #666;
}

/* 広告などの強調カード */
.article-card.featured {
    border: 2px solid #ff9800;
}

.article-card.featured .category {
    background-color: #fff3e0;
    color: #e65100;
}

/* フッター */
footer {
    background-color: #1b5e20;
    color: #fff;
    text-align: center;
    padding: 30px 0;
}

/* レスポンシブ */
@media (max-width: 600px) {
    .article-grid {
        grid-template-columns: 1fr;
    }
}