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

html {
    font-size: 18px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #292929;
    background: #fff;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}

.article {
    max-width: 740px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

.hero {
    text-align: center;
    padding: 48px 0 40px;
    border-bottom: 1px solid #e6e6e6;
    margin-bottom: 48px;
}

.hero-img {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 32px;
    background: #f2f2f2;

    min-height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.title {
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    font-size: 2.8rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 1.25rem;
    color: #757575;
    margin-bottom: 28px;
}

.meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.meta-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.author {
    font-weight: 600;
    font-size: 0.9rem;
}

.date {
    font-size: 0.8rem;
    color: #757575;
}

.toc {
    background: #f9f9f9;
    border: 1px solid #e6e6e6;
    border-radius: 8px;
    padding: 28px 32px;
    margin-bottom: 56px;
}

.toc h2 {
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
    color: #292929;
}

.toc ol {
    list-style: decimal;
    padding-left: 20px;
}

.toc ol ol {
    list-style: lower-alpha;
    margin-top: 4px;
}

.toc li {
    margin-bottom: 6px;
    font-size: 0.95rem;
    line-height: 1.6;
}

.toc a {
    color: #444;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s, color 0.2s;
}

.toc a:hover {
    color: #000;
    border-bottom-color: #999;
}

.section {
    margin-bottom: 56px;
}

.section h2 {
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    font-size: 1.75rem;
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
    padding-top: 8px;
}

.section h3 {
    font-family: 'Sora', sans-serif;
    font-weight: 600;
    font-size: 1.25rem;
    margin-top: 32px;
    margin-bottom: 14px;
    color: #333;
}

.section p {
    margin-bottom: 16px;
    color: #444;
}

figure {
    margin: 28px 0;
}

figure img {
    width: 100%;
    border-radius: 6px;
    background: #f2f2f2;

    min-height: 200px;
    object-fit: cover;
}

figcaption {
    text-align: center;
    font-size: 0.8rem;
    color: #999;
    margin-top: 8px;
    font-style: italic;
}

.image-row {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 28px 0;
}

.image-row figure {
    flex: 0 0 calc((100% - 40px) / 3);
    margin: 0;
}

.image-row figure img {
    height: 480px;
    min-height: unset;
    object-fit: contain;
}

@media (max-width: 600px) {
    html {
        font-size: 16px;
    }

    .title {
        font-size: 2rem;
    }

    .article {
        padding: 0 16px 60px;
    }

    .hero {
        padding: 32px 0 28px;
        margin-bottom: 32px;
    }

    .image-row {
        flex-direction: column;
        gap: 12px;
    }

    .image-row figure {
        flex: 0 0 100%;
    }

    .image-row figure img {
        height: auto;
    }
}