/* Page title sections — shared across the site */

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

.page-header--no-border {
    margin-bottom: 1.5rem;
}

.page-header--center {
    text-align: center;
}

.page-header__breadcrumb {
    margin-bottom: 0.75rem;
}

.page-header__breadcrumb .breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: 0;
}

.page-header--center .page-header__breadcrumb .breadcrumb {
    justify-content: center;
}

.page-header:not(.page-header--center) .page-header__breadcrumb .breadcrumb {
    padding-left: 0;
}

.page-header__eyebrow {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #3d5a4c;
    margin: 0 0 0.4rem;
}

.page-header__title {
    font-size: clamp(1.65rem, 4vw, 2.35rem);
    font-weight: 600;
    color: #1a1a1a;
    margin: 0;
    line-height: 1.25;
}

.page-header__title--book {
    font-style: italic;
    font-weight: 500;
}

.page-header__title--sm {
    font-size: 1.5rem;
}

.page-header__lede,
.page-header__meta {
    font-size: 1.05rem;
    color: #6c757d;
    margin: 0.5rem 0 0;
    line-height: 1.5;
    max-width: 38rem;
}

.page-header--center .page-header__lede,
.page-header--center .page-header__meta {
    margin-left: auto;
    margin-right: auto;
}

.page-header__accent {
    display: block;
    width: 2.75rem;
    height: 3px;
    background: #3d5a4c;
    border-radius: 2px;
    margin-top: 1rem;
}

.page-header--center .page-header__accent {
    margin-left: auto;
    margin-right: auto;
}

.book-detail-page {
    --book-primary: #3d5a4c;
    --book-primary-dark: #2f463b;
    --book-primary-light: #e8efeb;
    --book-primary-soft: #f4f7f5;
    --book-primary-rgb: 61, 90, 76;
}

.book-detail-page .page-header__accent {
    background: var(--book-primary);
}

.book-detail-page .section-heading {
    border-bottom-color: var(--book-primary-light);
}

.book-detail-page .book-nav__item--active .book-nav__link {
    color: var(--book-primary);
    background: var(--book-primary-light);
    border-left-color: var(--book-primary);
}

.book-detail-page a.book-nav__link:hover,
.book-detail-page a.book-nav__link:focus {
    color: var(--book-primary);
    background: var(--book-primary-soft);
}

.book-detail-page .book-flow__link {
    color: var(--book-primary);
}

.book-detail-page .book-flow__link:hover,
.book-detail-page .book-flow__link:focus {
    color: var(--book-primary-dark);
}

.book-detail-page .purchase-cta {
    background: linear-gradient(135deg, var(--book-primary-light) 0%, var(--book-primary-soft) 100%);
    border-color: rgba(var(--book-primary-rgb), 0.22);
    box-shadow: 0 2px 8px rgba(var(--book-primary-rgb), 0.1);
}

.book-detail-page .btn-purchase-cta {
    background: var(--book-primary);
    box-shadow: 0 2px 6px rgba(var(--book-primary-rgb), 0.35);
}

.book-detail-page .btn-purchase-cta:hover,
.book-detail-page .btn-purchase-cta:focus {
    background: var(--book-primary-dark);
    box-shadow: 0 4px 12px rgba(var(--book-primary-rgb), 0.4);
}

.book-detail-page .btn-purchase-cta:focus {
    outline-color: var(--book-primary);
}

.book-detail-page .btn-purchase-cta:active {
    box-shadow: 0 1px 4px rgba(var(--book-primary-rgb), 0.3);
}

.book-detail-page .purchase-modal__option:hover,
.book-detail-page .purchase-modal__option:focus {
    background: var(--book-primary);
    border-color: var(--book-primary);
}

.book-detail-page .btn-outline-dark {
    color: var(--book-primary);
    border-color: rgba(var(--book-primary-rgb), 0.45);
}

.book-detail-page .btn-outline-dark:hover,
.book-detail-page .btn-outline-dark:focus {
    color: #fff;
    background: var(--book-primary);
    border-color: var(--book-primary);
}

.sidebar__cover {
    display: block;
    width: auto;
    max-width: min(220px, 100%);
    height: auto;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 1.25rem;
}

.sidebar__info {
    margin-bottom: 0;
}

.sidebar__title {
    font-size: 1.2rem;
    font-style: italic;
    font-weight: 500;
    line-height: 1.45;
    text-align: center;
    margin: 0 0 0.4rem;
    padding: 0 0.25rem;
}

.sidebar__meta {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
    text-align: center;
}

.book-nav {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.book-nav__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.book-nav__item + .book-nav__item {
    margin-top: 0.25rem;
}

.book-nav__link {
    display: block;
    padding: 0.55rem 0.75rem;
    font-size: 0.9375rem;
    line-height: 1.35;
    font-weight: 500;
    color: #1a1a1a;
    text-decoration: none;
    border-left: 3px solid transparent;
    border-radius: 0 0.25rem 0.25rem 0;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.book-nav__item--active .book-nav__link {
    color: #3d5a4c;
    background: #e8efeb;
    border-left-color: #3d5a4c;
    font-weight: 600;
}

a.book-nav__link:hover,
a.book-nav__link:focus {
    color: #3d5a4c;
    background: #f4f7f5;
    text-decoration: none;
}

.book-flow {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.book-flow__link {
    font-weight: 500;
    color: #3d5a4c;
    text-decoration: none;
}

.book-flow__link:hover,
.book-flow__link:focus {
    color: #2f463b;
    text-decoration: underline;
}

.book-detail-page .sidebar__meta {
    display: none;
}

.book-detail-page .sidebar__title {
    margin-bottom: 0;
}

.book-section + .book-section {
    margin-top: 2rem;
    padding-top: 0.25rem;
}

.content-panel {
    line-height: 1.6;
}

.content-panel .blockquote {
    margin-bottom: 0;
}

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

.page-header--no-border + .row {
    margin-top: 0.25rem;
}

.section-heading {
    font-size: 1.35rem;
    font-weight: 600;
    color: #1a1a1a;
    margin: 0 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e8efeb;
}

.purchase-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1.25rem;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, #e8efeb 0%, #f8faf9 100%);
    border: 1px solid rgba(61, 90, 76, 0.2);
    border-radius: 0.5rem;
    box-shadow: 0 2px 8px rgba(61, 90, 76, 0.08);
}

.purchase-cta--center {
    flex-direction: column;
    text-align: center;
    align-items: center;
}

.purchase-cta--sidebar {
    flex-direction: column;
    align-items: stretch;
    margin-top: 1.25rem;
    padding: 0.875rem 1rem;
}

.purchase-cta--sidebar .purchase-cta__copy {
    min-width: 0;
    margin-bottom: 0.75rem;
}

.purchase-cta--sidebar .purchase-cta__headline {
    font-size: 0.98rem;
}

.purchase-cta--sidebar .purchase-cta__hint {
    font-size: 0.8125rem;
}

.purchase-cta--sidebar .btn-purchase-cta {
    width: 100%;
}

.purchase-cta__copy {
    flex: 1;
    min-width: 10rem;
}

.purchase-cta__headline {
    display: block;
    font-size: 1.05rem;
    font-weight: 600;
    color: #1a1a1a;
    line-height: 1.3;
}

.purchase-cta__hint {
    display: block;
    margin-top: 0.15rem;
    font-size: 0.875rem;
    color: #5c6b63;
    line-height: 1.4;
}

.btn-purchase-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 48px;
    padding: 0.65rem 1.75rem;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: #fff !important;
    background: #3d5a4c;
    border: none;
    border-radius: 0.375rem;
    box-shadow: 0 2px 6px rgba(61, 90, 76, 0.35);
    transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    flex-shrink: 0;
}

.btn-purchase-cta:hover,
.btn-purchase-cta:focus {
    color: #fff !important;
    background: #2f463b;
    box-shadow: 0 4px 12px rgba(61, 90, 76, 0.4);
    transform: translateY(-1px);
}

.btn-purchase-cta:focus {
    outline: 2px solid #3d5a4c;
    outline-offset: 3px;
}

.btn-purchase-cta:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(61, 90, 76, 0.3);
}

.purchase-cta__icon {
    flex-shrink: 0;
}

/* Purchase modal */
.purchase-modal .modal-title {
    font-style: italic;
    font-weight: 500;
    color: #1a1a1a;
}

.purchase-modal__desc {
    font-size: 0.9rem;
    color: #6c757d;
}

.purchase-modal__option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #1a1a1a;
    text-decoration: none;
    background: #f8f9fa;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 0.375rem;
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.purchase-modal__option:last-child {
    margin-bottom: 0;
}

.purchase-modal__option:hover,
.purchase-modal__option:focus {
    color: #fff;
    background: #3d5a4c;
    border-color: #3d5a4c;
    text-decoration: none;
}

.purchase-modal__external {
    font-size: 0.85rem;
    opacity: 0.7;
}

@media (prefers-reduced-motion: reduce) {
    .btn-purchase-cta {
        transition: none;
    }

    .btn-purchase-cta:hover,
    .btn-purchase-cta:focus {
        transform: none;
    }
}

@media (max-width: 767.98px) {
    .page-header {
        margin-bottom: 1.5rem;
    }

    .page-header__title {
        font-size: 1.5rem;
    }

    .page-header__lede,
    .page-header__meta {
        font-size: 0.95rem;
    }

    .section-heading {
        font-size: 1.2rem;
    }

    .purchase-cta {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
        padding: 1rem;
    }

    .purchase-cta__copy {
        min-width: 0;
    }

    .btn-purchase-cta {
        width: 100%;
        padding: 0.75rem 1.25rem;
    }
}