.book-detail-page {
    min-height: calc(100vh - 116px);
    padding: 80px 0 100px;
    background:
        radial-gradient(
            circle at top right,
            rgba(201, 155, 53, 0.14),
            transparent 30%
        ),
        var(--ivory);
}

.book-detail-hero {
    display: grid;
    grid-template-columns: minmax(280px, 390px) 1fr;
    gap: 72px;
    align-items: center;
    margin-bottom: 90px;
}

.book-detail-cover {
    padding: 18px;
    background-color: var(--white);
    box-shadow: 0 24px 60px rgba(8, 29, 51, 0.16);
}

.book-detail-cover img {
    display: block;
    width: 100%;
    height: auto;
}

.book-detail-summary {
    max-width: 720px;
}

.book-detail-eyebrow {
    margin-bottom: 14px;
    color: #9b6a13;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.2rem;
    text-transform: uppercase;
}

.book-detail-summary h1 {
    margin-bottom: 18px;
    color: var(--navy);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(3rem, 6vw, 5.2rem);
    font-weight: 700;
    line-height: 0.98;
}

.book-detail-subtitle {
    max-width: 650px;
    margin-bottom: 18px;
    color: #9b6a13;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.5rem, 3vw, 2.3rem);
    line-height: 1.3;
}

.book-detail-author {
    margin-bottom: 26px;
    color: var(--navy-light);
    font-weight: 700;
}

.book-detail-description {
    max-width: 680px;
    margin-bottom: 34px;
    color: #53606d;
    font-size: 1.08rem;
    line-height: 1.8;
}

.book-detail-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.book-primary-action,
.book-secondary-action {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.09rem;
    text-decoration: none;
    text-transform: uppercase;
}

.book-primary-action {
    border: 1px solid var(--gold);
    background-color: var(--gold);
    color: var(--navy);
}

.book-primary-action:hover,
.book-primary-action:focus {
    border-color: var(--gold-light);
    background-color: var(--gold-light);
    color: var(--navy);
}

.book-secondary-action {
    border: 1px solid var(--navy);
    background-color: transparent;
    color: var(--navy);
}

.book-secondary-action:hover,
.book-secondary-action:focus {
    background-color: var(--navy);
    color: var(--white);
}

.book-detail-section {
    padding: 72px 0;
    border-top: 1px solid rgba(201, 155, 53, 0.32);
}

.book-detail-section-heading {
    max-width: 820px;
    margin-bottom: 34px;
}

.book-detail-section-heading h2 {
    margin-bottom: 0;
    color: var(--navy);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2.4rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.05;
}

.book-detail-copy {
    max-width: 850px;
}

.book-detail-copy p {
    color: #53606d;
    font-size: 1.06rem;
    line-height: 1.85;
}

.book-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
    margin-bottom: 72px;
}

.book-detail-panel {
    padding: 38px;
    border-top: 4px solid var(--gold);
    background-color: var(--white);
    box-shadow: 0 18px 45px rgba(8, 29, 51, 0.10);
}

.book-detail-panel h2 {
    margin-bottom: 24px;
    color: var(--navy);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 2rem;
    line-height: 1.15;
}

.book-detail-panel ul {
    margin: 0;
    padding-left: 1.25rem;
    color: #53606d;
}

.book-detail-panel li {
    margin-bottom: 12px;
    line-height: 1.65;
}

.book-detail-facts {
    margin: 0;
}

.book-detail-facts > div {
    display: grid;
    grid-template-columns: 145px 1fr;
    gap: 20px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(8, 29, 51, 0.10);
}

.book-detail-facts > div:last-child {
    border-bottom: 0;
}

.book-detail-facts dt {
    color: #9b6a13;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.08rem;
    text-transform: uppercase;
}

.book-detail-facts dd {
    margin: 0;
    color: #53606d;
}

.book-theme-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
}

.book-theme-grid article {
    min-height: 230px;
    padding: 30px;
    border-top: 3px solid var(--gold);
    background-color: var(--white);
    box-shadow: 0 14px 35px rgba(8, 29, 51, 0.08);
}

.book-theme-grid span {
    color: var(--gold);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 2rem;
    font-weight: 700;
}

.book-theme-grid h3 {
    margin: 18px 0 12px;
    color: var(--navy);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.7rem;
}

.book-theme-grid p {
    margin: 0;
    color: #53606d;
    line-height: 1.65;
}

.book-resource-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
}

.book-resource-card {
    display: flex;
    min-height: 260px;
    flex-direction: column;
    padding: 32px;
    border: 1px solid rgba(201, 155, 53, 0.32);
    background-color: var(--white);
    box-shadow: 0 14px 35px rgba(8, 29, 51, 0.07);
}

.book-resource-card h3 {
    margin-bottom: 16px;
    color: var(--navy);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.8rem;
}

.book-resource-card p {
    color: #53606d;
    line-height: 1.7;
}

.book-resource-card a {
    align-self: flex-start;
    margin-top: auto;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--gold);
    color: #8a5f10;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08rem;
    text-decoration: none;
    text-transform: uppercase;
}

.book-resource-card a:hover,
.book-resource-card a:focus {
    border-bottom-color: var(--navy);
    color: var(--navy);
}

.book-next-step {
    margin-top: 80px;
    padding: 58px;
    background-color: var(--navy);
    color: var(--white);
    text-align: center;
}

.book-next-step .book-detail-eyebrow {
    color: var(--gold-light);
}

.book-next-step h2 {
    margin-bottom: 18px;
    color: var(--white);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 700;
}

.book-next-step p {
    max-width: 700px;
    margin: 0 auto 28px;
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.75;
}

@media (max-width: 991px) {
    .book-detail-hero {
        grid-template-columns: 300px 1fr;
        gap: 42px;
    }

    .book-theme-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .book-resource-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .book-detail-page {
        padding: 52px 0 72px;
    }

    .book-detail-hero {
        grid-template-columns: 1fr;
        gap: 38px;
        margin-bottom: 60px;
    }

    .book-detail-cover {
        max-width: 380px;
        margin: 0 auto;
    }

    .book-detail-actions {
        display: grid;
    }

    .book-primary-action,
    .book-secondary-action {
        width: 100%;
    }

    .book-detail-section {
        padding: 52px 0;
    }

    .book-detail-grid,
    .book-theme-grid {
        grid-template-columns: 1fr;
    }

    .book-detail-panel {
        padding: 28px;
    }

    .book-detail-facts > div {
        grid-template-columns: 1fr;
        gap: 5px;
    }

    .book-next-step {
        margin-top: 55px;
        padding: 40px 24px;
    }
}