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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
    color: #222;
    line-height: 1.7;
    background: #ffffff;
}

h1, h2, h3, h4 {
    font-family: "Georgia", "Playfair Display", serif;
    font-weight: 400;
}

a {
    color: #0066cc;
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: #0052a3;
    text-decoration: underline;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ===== MASTHEAD ===== */
header {
    border-bottom: 2px solid #ddd;
    padding: 2rem 0 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

header h1 {
    font-size: 48px;
    margin-bottom: 0.25rem;
    color: #111;
}

header .subtitle {
    font-size: 16px;
    color: #666;
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
}

nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

nav a {
    color: #666;
}

nav a:hover,
nav a.active {
    color: #111;
    font-weight: 600;
}

/* ===== BOOK SHOWCASE ===== */
.book-section {
    margin-bottom: 4rem;
}

.book-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    align-items: flex-start;
    padding: 2rem;
    background: #f9f9f9;
    border-left: 4px solid #111;
}

.book-cover {
    width: 100%;
    max-width: 300px;
    background: #e8e8e8;
    aspect-ratio: 3 / 4;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 14px;
}

.book-info h2 {
    font-size: 32px;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    color: #111;
}

.book-author {
    font-size: 16px;
    color: #666;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid #ddd;
    padding-bottom: 1rem;
}

.book-description {
    font-size: 15px;
    line-height: 1.7;
    color: #333;
    margin-bottom: 1.5rem;
}

.cta-button {
    display: inline-block;
    background: #111;
    color: #fff;
    padding: 12px 32px;
    text-decoration: none;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: background 0.3s ease;
}

.cta-button:hover {
    background: #333;
    text-decoration: none;
}

/* ===== FEATURED ARTICLE ===== */
.featured-article {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #ddd;
}

.featured-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    margin-bottom: 1.5rem;
    display: block;
}

.featured-box {
    background: #f9f9f9;
    padding: 2rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid #111;
}

.featured-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #999;
    margin-bottom: 0.75rem;
}

.featured-article h2 {
    font-size: 36px;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: #111;
}

.featured-article p {
    font-size: 16px;
    color: #555;
    line-height: 1.7;
}

.byline {
    font-size: 13px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 1rem;
}

/* ===== ARTICLES SECTION ===== */
.articles-section {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 24px;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #ddd;
    color: #111;
}

.articles-grid {
    display: grid;
    gap: 2rem;
}

.article-item {
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #ddd;
}

.article-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.publication {
    font-size: 12px;
    text-transform: uppercase;
    color: #999;
    margin-bottom: 0.5rem;
    letter-spacing: 0.08em;
}

.article-title {
    font-size: 22px;
    margin-bottom: 0.75rem;
    color: #111;
    line-height: 1.3;
}

.article-description {
    font-size: 15px;
    color: #666;
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.article-date {
    font-size: 13px;
    color: #999;
}

.article-link {
    font-size: 13px;
    color: #0066cc;
}

/* ===== ABOUT SECTION ===== */
.about-section {
    background: #f9f9f9;
    padding: 2rem;
    border-left: 4px solid #111;
}

.about-section h3 {
    font-size: 24px;
    margin-bottom: 1.5rem;
    color: #111;
}

.about-section p {
    font-size: 15px;
    line-height: 1.7;
    color: #333;
    margin-bottom: 1rem;
}

.about-section p:last-child {
    margin-bottom: 0;
}

/* ===== CONTENT SECTION (ABOUT & CONTACT) ===== */
.content-section {
    margin-bottom: 3rem;
}

.content-text {
    font-size: 15px;
    line-height: 1.8;
    color: #333;
    margin-bottom: 1.5rem;
}

.content-text p {
    margin-bottom: 1.5rem;
}

.content-text p:last-child {
    margin-bottom: 0;
}

.memberships {
    background: #f9f9f9;
    padding: 2rem;
    border-left: 4px solid #111;
    margin-top: 2rem;
}

.memberships h3 {
    font-size: 18px;
    margin-bottom: 1rem;
    color: #111;
}

.memberships ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.memberships li {
    font-size: 15px;
    color: #333;
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

.memberships li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #666;
}

/* ===== CONTACT SECTION ===== */
.contact-info {
    background: #f9f9f9;
    padding: 2rem;
    border-left: 4px solid #111;
    margin-bottom: 2rem;
}

.contact-item {
    margin-bottom: 1.5rem;
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-label {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #999;
    margin-bottom: 0.5rem;
}

.contact-value {
    font-size: 16px;
    color: #111;
    font-weight: 500;
}

.contact-value a {
    color: #0066cc;
}

.contact-description {
    font-size: 15px;
    line-height: 1.8;
    color: #333;
    margin-bottom: 1.5rem;
}

.contact-description p {
    margin-bottom: 1rem;
}

.contact-description p:last-child {
    margin-bottom: 0;
}

/* ===== ARTICLE DETAIL ===== */
.article-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #ddd;
}

.article-header h2 {
    font-size: 36px;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    color: #111;
}

.article-meta {
    font-size: 14px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

.article-byline {
    font-size: 15px;
    color: #666;
    font-style: italic;
}

.article-content {
    font-size: 16px;
    line-height: 1.8;
    color: #333;
}

.article-content p {
    margin-bottom: 1.5rem;
}

/* ===== FOOTER ===== */
footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid #ddd;
    text-align: center;
    color: #999;
    font-size: 13px;
}

footer p {
    margin-bottom: 0.5rem;
}

/* ===== BACK LINK ===== */
.back-link {
    display: inline-block;
    margin-bottom: 2rem;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #666;
}

.back-link:hover {
    color: #111;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    header h1 {
        font-size: 36px;
    }

    header .subtitle {
        font-size: 14px;
    }

    nav {
        gap: 1rem;
        font-size: 12px;
        flex-wrap: wrap;
    }

    .book-container {
        grid-template-columns: 1fr;
        padding: 1.5rem;
    }

    .book-cover {
        max-width: 250px;
        margin: 0 auto;
    }

    .book-info h2 {
        font-size: 28px;
    }

    .featured-article h2 {
        font-size: 28px;
    }

    .featured-box {
        padding: 1.5rem;
    }

    .section-title {
        font-size: 20px;
    }

    .article-title {
        font-size: 18px;
    }

    .about-section {
        padding: 1.5rem;
    }

    .about-section h3 {
        font-size: 20px;
    }

    .memberships {
        padding: 1.5rem;
    }

    .contact-info {
        padding: 1.5rem;
    }

    .contact-value {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

    header {
        padding: 1.5rem 0 1rem;
        margin-bottom: 1.5rem;
    }

    header h1 {
        font-size: 28px;
    }

    header .subtitle {
        font-size: 13px;
        margin-bottom: 1rem;
    }

    nav {
        gap: 0.75rem;
        font-size: 11px;
    }

    .book-container {
        padding: 1rem;
    }

    .book-info h2 {
        font-size: 24px;
    }

    .book-description {
        font-size: 14px;
    }

    .cta-button {
        padding: 10px 24px;
        font-size: 12px;
    }

    .featured-article h2 {
        font-size: 22px;
    }

    .section-title {
        font-size: 18px;
        margin-bottom: 1rem;
    }

    .articles-grid {
        gap: 1.5rem;
    }

    .article-item {
        padding-bottom: 1rem;
    }

    .article-title {
        font-size: 16px;
    }

    .article-description {
        font-size: 14px;
    }

    .content-text {
        font-size: 14px;
    }

    .contact-value {
        font-size: 14px;
    }

    .contact-description {
        font-size: 14px;
    }
}