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

/* === 継承：body に一度だけフォントを設定 → 全子孫に引き継がれる === */
body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', sans-serif;
    background-color: #f3f4f6;
    color: #1f2937;
    padding: 2rem;
}

/* === コンテナー === */
.container {
    max-width: 480px;
    margin: 0 auto;
}

/* === Block: .blog-card === */
.blog-card {
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* 擬似クラス: ホバー時の効果 */
.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

/* === Element: .blog-card__header === */
.blog-card__header {
    padding: 1rem 1.25rem 0.5rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* === Element: .blog-card__tag === */
.blog-card__tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background-color: #d1fae5;
    color: #065f46;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* === Modifier: .blog-card__tag--featured（注目タグ） === */
.blog-card__tag--featured {
    background-color: #059669;
    color: #ffffff;
}

/* === Element: .blog-card__body === */
.blog-card__body {
    padding: 0.75rem 1.25rem;
}

/* === Element: .blog-card__title === */
.blog-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 0.5rem;
}

/* 子孫セレクター: .blog-card__title 内の a のみを対象 */
.blog-card__title a {
    color: #1f2937;
    text-decoration: none;
}

/* 擬似クラス: リンクのホバー効果 */
.blog-card__title a:hover {
    color: #059669;
    text-decoration: underline;
}

/* === Element: .blog-card__description === */
.blog-card__description {
    font-size: 0.875rem;
    color: #4b5563;
    line-height: 1.6;
}

/* === Element: .blog-card__footer === */
.blog-card__footer {
    padding: 0.75rem 1.25rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f3f4f6;
}

/* === Element: .blog-card__date === */
.blog-card__date {
    font-size: 0.8rem;
    color: #9ca3af;
}

/* === Element: .blog-card__link === */
.blog-card__link {
    font-size: 0.85rem;
    font-weight: 600;
    color: #059669;
    text-decoration: none;
}

/* 擬似クラス: リンクのホバー効果 */
.blog-card__link:hover {
    text-decoration: underline;
}