/**
 * Single Book
 * File: assets/css/single-book.css
 *
 * Uses:
 * - global.css root variables
 * - No Bootstrap
 * - No Tailwind
 * - No inline styles
 */


/* =========================================================
   BOOK PAGE
   ========================================================= */

.single-book-page {
    padding: 2rem 0 4rem;
}

.single-book-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 2rem;
    align-items: start;
}

.single-book-main {
    min-width: 0;
}

.book-details {
    min-width: 0;
}


/* =========================================================
   BREADCRUMB
   ========================================================= */

.book-breadcrumb {
    padding-top: 1rem;
    padding-bottom: 0.5rem;
}

.book-breadcrumb .breadcrumb-list {
    margin: 0;
}


/* =========================================================
   BOOK HEADER
   ========================================================= */

.book-header {
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.book-title {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;

    margin: 0;

    color: var(--color-primary);

    font-size: clamp(1.6rem, 3vw, 2.15rem);
    line-height: 1.25;
    font-weight: 700;
}

.book-title-icon {
    flex: 0 0 auto;

    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 2.5rem;
    height: 2.5rem;

    margin-top: 0.1rem;

    color: var(--color-primary);
    background: color-mix(
        in srgb,
        var(--color-primary) 10%,
        transparent
    );

    border-radius: var(--radius-md);

    font-size: 1.15rem;
}


/* =========================================================
   BOOK META
   ========================================================= */

.book-meta {
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;

    border-bottom: 1px solid var(--color-border);
}

.book-meta-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.book-meta-item {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;

    padding: 1rem;

    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.book-meta-icon {
    flex: 0 0 auto;

    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 2.25rem;
    height: 2.25rem;

    color: var(--color-primary);
    background: var(--color-surface);

    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.book-meta-icon-download {
    color: var(--color-secondary);
}

.book-meta-content {
    min-width: 0;

    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.book-meta-label {
    color: var(--color-text-muted);

    font-size: 0.8rem;
    line-height: 1.3;
    font-weight: 600;
}

.book-meta-value {
    color: var(--color-text);

    font-size: 0.95rem;
    line-height: 1.4;
}


/* =========================================================
   BUTTONS
   ========================================================= */

.book-download-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;

    min-height: 2.5rem;
    padding: 0.65rem 1rem;

    color: var(--color-white);
    background: var(--color-primary);

    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);

    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;

    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        transform var(--transition-fast);
}

.book-download-button:hover {
    color: var(--color-white);
    background: var(--color-secondary);
    border-color: var(--color-secondary);

    transform: translateY(-1px);
}

.book-download-button:focus-visible,
.book-program-button:focus-visible,
.book-taxonomy-link:focus-visible {
    outline: 3px solid color-mix(
        in srgb,
        var(--color-primary) 30%,
        transparent
    );

    outline-offset: 2px;
}

.book-download-button-small {
    min-height: 2.2rem;
    padding: 0.5rem 0.8rem;

    font-size: 0.82rem;
}


/* =========================================================
   BOOK PDF SECTION
   ========================================================= */

.book-pdf-section {
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;

    border-bottom: 1px solid var(--color-border);
}

.book-section-header {
    margin-bottom: 1rem;
}

.book-section-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;

    margin: 0;

    color: var(--color-text);

    font-size: 1.15rem;
    line-height: 1.4;
    font-weight: 700;
}

.book-section-title i {
    color: var(--color-primary);
}

.book-pdf-viewer {
    overflow: hidden;

    width: 100%;

    background: var(--color-background);

    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.book-pdf-viewer iframe {
    display: block;

    width: 100%;
    height: 700px;

    border: 0;

    background: var(--color-background);
}

.book-pdf-action {
    display: flex;
    justify-content: center;

    margin-top: 1rem;
}


/* =========================================================
   TAXONOMY
   ========================================================= */

.book-taxonomy {
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;

    border-bottom: 1px solid var(--color-border);
}

.book-taxonomy-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.book-taxonomy-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;

    padding: 0.45rem 0.7rem;

    color: var(--color-primary);
    background: color-mix(
        in srgb,
        var(--color-primary) 8%,
        var(--color-surface)
    );

    border: 1px solid color-mix(
        in srgb,
        var(--color-primary) 18%,
        var(--color-border)
    );

    border-radius: var(--radius-pill);

    font-size: 0.82rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;

    transition:
        background-color var(--transition-fast),
        color var(--transition-fast),
        border-color var(--transition-fast);
}

.book-taxonomy-link:hover {
    color: var(--color-white);
    background: var(--color-primary);
    border-color: var(--color-primary);
}


/* =========================================================
   ADS
   ========================================================= */

.book-content-ad {
    margin: 1.5rem 0;
}

.book-sidebar-ad {
    margin: 1.5rem 0;
}


/* =========================================================
   BOOK DESCRIPTION
   ========================================================= */

.book-description {
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;

    border-bottom: 1px solid var(--color-border);
}

.book-description-content {
    color: var(--color-text);
    font-size: 1rem;
    line-height: 1.8;
}

.book-description-content > :first-child {
    margin-top: 0;
}

.book-description-content > :last-child {
    margin-bottom: 0;
}

.book-description-content h2,
.book-description-content h3,
.book-description-content h4 {
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;

    color: var(--color-text);

    line-height: 1.35;
}

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

.book-description-content a {
    color: var(--color-primary);
    font-weight: 600;
}

.book-description-content ul,
.book-description-content ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.book-description-content li {
    margin-bottom: 0.45rem;
}

.book-description-content img {
    max-width: 100%;
    height: auto;

    border-radius: var(--radius-md);
}


/* =========================================================
   CONTACT FORM
   ========================================================= */

.book-contact-section {
    margin-top: 1.5rem;
}


/* =========================================================
   SIDEBAR
   ========================================================= */

.book-sidebar {
    min-width: 0;
}

.book-sidebar-inner {
    position: sticky;
    top: 2rem;

    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}


/* =========================================================
   SIDEBAR SECTION HEADERS
   ========================================================= */

.book-sidebar-section-header {
    padding: 1rem 1.15rem;

    background: var(--color-primary);

    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.book-sidebar-section-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;

    margin: 0;

    color: var(--color-white);

    font-size: 1rem;
    line-height: 1.4;
    font-weight: 700;
}

.book-sidebar-section-title i {
    flex: 0 0 auto;
}


/* =========================================================
   APPLICABLE PROGRAMS
   ========================================================= */

.book-programs {
    overflow: hidden;

    background: var(--color-surface);

    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.book-program-list {
    display: flex;
    flex-direction: column;
}

.book-program-card {
    padding: 1rem;

    border-bottom: 1px solid var(--color-border);
}

.book-program-card:last-child {
    border-bottom: 0;
}

.book-program-title {
    margin: 0 0 0.9rem;

    font-size: 1rem;
    line-height: 1.4;
}

.book-program-title a {
    color: var(--color-text);
    text-decoration: none;
}

.book-program-title a:hover {
    color: var(--color-primary);
}

.book-program-details {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.book-program-detail {
    display: flex;
    align-items: flex-start;
    gap: 0.45rem;

    color: var(--color-text-muted);

    font-size: 0.84rem;
    line-height: 1.45;
}

.book-program-detail > i {
    flex: 0 0 auto;

    width: 1rem;

    margin-top: 0.15rem;

    color: var(--color-text-muted);
    text-align: center;
}

.book-program-detail-label {
    color: var(--color-text);
    font-weight: 600;
}

.book-program-detail-value {
    color: var(--color-text-muted);
}

.book-program-footer {
    margin-top: 1rem;
}

.book-program-button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;

    width: 100%;
    padding: 0.65rem 0.8rem;

    color: var(--color-primary);
    background: var(--color-surface);

    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);

    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;

    transition:
        color var(--transition-fast),
        background-color var(--transition-fast),
        border-color var(--transition-fast);
}

.book-program-button:hover {
    color: var(--color-white);
    background: var(--color-primary);
    border-color: var(--color-primary);
}


/* =========================================================
   PROGRAM STATUS
   ========================================================= */

.book-status {
    display: inline-flex;
    align-items: center;

    padding: 0.2rem 0.5rem;

    border-radius: var(--radius-pill);

    font-size: 0.72rem;
    line-height: 1.2;
    font-weight: 700;
}

.book-status-open {
    color: var(--color-secondary);
    background: color-mix(
        in srgb,
        var(--color-secondary) 12%,
        var(--color-surface)
    );
}

.book-status-closed {
    color: var(--color-text-muted);
    background: var(--color-background);
}


/* =========================================================
   SEMESTER
   ========================================================= */

.book-semester {
    overflow: hidden;

    background: var(--color-surface);

    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.book-semester-body {
    padding: 1rem 1.15rem;
}

.book-semester-name {
    margin: 0 0 1rem;

    font-size: 1rem;
    line-height: 1.4;
}

.book-semester-name a {
    color: var(--color-primary);
    text-decoration: none;
}

.book-semester-name a:hover {
    color: var(--color-secondary);
}

.book-semester-details {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.book-semester-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;

    color: var(--color-text-muted);

    font-size: 0.85rem;
    line-height: 1.45;
}

.book-semester-item i {
    flex: 0 0 auto;

    width: 1rem;
    margin-top: 0.15rem;

    color: var(--color-text-muted);
    text-align: center;
}

.book-semester-item strong {
    color: var(--color-text);
    font-weight: 600;
}


/* =========================================================
   RELATED BOOKS
   ========================================================= */

.related-books {
    overflow: hidden;

    background: var(--color-surface);

    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.related-books-list {
    margin: 0;
    padding: 0;

    list-style: none;
}

.related-book-item {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;

    padding: 0.9rem 1rem;

    border-bottom: 1px solid var(--color-border);

    font-size: 0.88rem;
    line-height: 1.5;
}

.related-book-item:last-child {
    border-bottom: 0;
}

.related-book-item > i {
    flex: 0 0 auto;

    margin-top: 0.2rem;

    color: var(--color-primary);
}

.related-book-item a {
    color: var(--color-text);
    text-decoration: none;
}

.related-book-item a:hover {
    color: var(--color-primary);
}


/* =========================================================
   SIDEBAR TEMPLATE PARTS
   ========================================================= */

.book-sidebar .course-details,
.book-sidebar .latest-news {
    margin: 0;
}


/* =========================================================
   RESPONSIVE — TABLET
   ========================================================= */

@media (max-width: 991px) {

    .single-book-page {
        padding-top: 1.5rem;
    }

    .single-book-layout {
        grid-template-columns: minmax(0, 1fr);
        gap: 2rem;
    }

    .book-sidebar-inner {
        position: static;

        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        align-items: start;
    }

    .book-sidebar-ad {
        grid-column: 1 / -1;
    }

}


/* =========================================================
   RESPONSIVE — MOBILE
   ========================================================= */

@media (max-width: 640px) {

    .single-book-page {
        padding: 1rem 0 3rem;
    }

    .book-breadcrumb {
        padding-top: 0.75rem;
    }

    .book-title {
        font-size: 1.45rem;
    }

    .book-title-icon {
        width: 2.15rem;
        height: 2.15rem;

        font-size: 1rem;
    }

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

    .book-meta-item {
        padding: 0.85rem;
    }

    .book-pdf-viewer iframe {
        height: 500px;
    }

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

    .book-sidebar-ad {
        grid-column: auto;
    }

    .book-section-title {
        font-size: 1.05rem;
    }

    .book-description-content {
        font-size: 0.95rem;
        line-height: 1.75;
    }

}


/* =========================================================
   ACCESSIBILITY
   ========================================================= */

@media (prefers-reduced-motion: reduce) {

    .book-download-button,
    .book-program-button,
    .book-taxonomy-link {
        transition: none;
    }

}


/* =========================================================
   PRINT
   ========================================================= */

@media print {

    .book-sidebar,
    .book-content-ad,
    .book-sidebar-ad,
    .book-contact-section {
        display: none;
    }

    .single-book-layout {
        display: block;
    }

    .book-pdf-viewer {
        border: 0;
    }

}