/* ============================================
   The Opinions — PDF BOOKS PAGE STYLES
   Load AFTER style.css, only on pages/pdfbooks.html.
   Self-contained: does not depend on publications.css or home.css.
   Uses the CSS variables defined in style.css (--brick, --ink, etc).
   Every class is prefixed .pb- so nothing collides with other pages.
   ============================================ */

.pb-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- Banner ---------- */

.pb-banner {
    background: linear-gradient(160deg, var(--brick) 0%, var(--brick-deep) 48%, var(--ink) 100%);
    padding: var(--space-6) var(--space-3) var(--space-5);
    text-align: center;
}

.pb-banner-inner {
    max-width: 44rem;
    margin: 0 auto;
}

.pb-banner-kicker {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1rem;
    letter-spacing: 0.04em;
    color: var(--marigold);
    margin-bottom: var(--space-1);
}

.pb-banner h1 {
    color: var(--paper);
    font-size: clamp(2.1rem, 4.4vw, 3.2rem);
}

.pb-banner-sub {
    margin: var(--space-2) auto 0;
    max-width: 46ch;
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.82);
}

/* ---------- Toolbar ---------- */

.pb-toolbar-wrap {
    padding: var(--space-3) var(--space-3) 0;
}

.pb-toolbar {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
}

.pb-search-box {
    position: relative;
    flex: 1 1 260px;
    min-width: 0;
}

.pb-search-box svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--ink-soft);
    pointer-events: none;
}

.pb-search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.6rem;
    border: 1.5px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--paper);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink);
}

.pb-search-box input:focus {
    outline: none;
    border-color: var(--brick);
}

.pb-cat-select {
    flex: 0 1 220px;
    min-width: 0;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--paper);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink);
    cursor: pointer;
}

.pb-cat-select:focus {
    outline: none;
    border-color: var(--brick);
}

.pb-count {
    margin-left: auto;
    font-size: 0.88rem;
    color: var(--ink-soft);
}

/* ---------- Grid ---------- */

.pb-list-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-4) var(--space-3) var(--space-6);
}

.pb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(220px, 100%), 1fr));
    gap: var(--space-4) var(--space-3);
}

.pb-status {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-5) 0;
}

.pb-status a,
.pb-status button {
    color: var(--brick);
    font-weight: 700;
    text-decoration: underline;
    background: none;
    border: none;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

/* ---------- Book card ---------- */

.pb-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* The cover is the memorable element: a real book proportion (3:4),
   a spine shadow on the left edge, and a lift on hover. */
.pb-cover {
    position: relative;
    display: block;
    width: 100%;
    aspect-ratio: 3 / 4;
    padding: 0;
    border: none;
    border-radius: 3px 8px 8px 3px;
    overflow: hidden;
    cursor: pointer;
    background: var(--paper-deep);
    box-shadow: 0 10px 24px rgba(17, 17, 17, 0.2), 0 2px 4px rgba(17, 17, 17, 0.12);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pb-cover::after {
    /* spine crease */
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 10px;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.28), rgba(0, 0, 0, 0) 100%);
    pointer-events: none;
}

.pb-cover:hover,
.pb-cover:focus-visible {
    transform: translateY(-6px);
    box-shadow: 0 18px 34px rgba(17, 17, 17, 0.26), 0 4px 8px rgba(17, 17, 17, 0.14);
}

.pb-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Shown when a book has no cover image (or the image fails to load) */
.pb-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1.4rem 1.1rem 1.1rem 1.6rem;
    text-align: left;
    background: linear-gradient(155deg, #2a2a2a 0%, #111111 100%);
    color: var(--paper);
}

.pb-cover-placeholder.pb-tone-1 {
    background: linear-gradient(155deg, #4a4a4a 0%, #1f1f1f 100%);
}

.pb-cover-placeholder.pb-tone-2 {
    background: linear-gradient(155deg, #5f5f5f 0%, #2b2b2b 100%);
}

.pb-cover-placeholder.pb-tone-3 {
    background: linear-gradient(155deg, #3a3a3a 0%, #0a0a0a 100%);
}

.pb-cover-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.2rem;
    line-height: 1.2;
    color: var(--paper);
    overflow-wrap: anywhere;
    display: -webkit-box;
    -webkit-line-clamp: 5;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.pb-cover-title.is-urdu {
    line-height: 1.9;
}

.pb-cover-badge {
    align-self: flex-start;
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--ink);
    background: var(--paper);
    padding: 0.2rem 0.55rem;
    border-radius: 3px;
}

.pb-card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding-top: var(--space-2);
}

.pb-card-tag {
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--ink);
    background: rgba(0, 0, 0, 0.08);
    padding: 0.15rem 0.65rem;
    border-radius: 999px;
    margin-bottom: 0.5rem;
    max-width: 100%;
    overflow-wrap: anywhere;
}

.pb-card-title {
    font-size: 1.1rem;
    line-height: 1.25;
    margin-bottom: 0.25rem;
    overflow-wrap: anywhere;
}

.pb-card-title button {
    all: unset;
    cursor: pointer;
    display: inline;
}

.pb-card-title button:hover {
    text-decoration: underline;
}

.pb-card-title button:focus-visible {
    outline: 2.5px solid var(--brick);
    outline-offset: 3px;
}

.pb-card-author {
    font-size: 0.88rem;
    color: var(--ink-soft);
    margin-bottom: 0.4rem;
    overflow-wrap: anywhere;
}

.pb-card-desc {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--ink-soft);
    margin-bottom: 0.6rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    overflow-wrap: anywhere;
}

.pb-card-desc.is-urdu {
    line-height: 1.9;
}

.pb-card-meta {
    font-size: 0.8rem;
    color: var(--ink-soft);
    margin-bottom: 0.75rem;
    margin-top: auto;
}

.pb-card-actions {
    display: flex;
    gap: 0.5rem;
}

.pb-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.6rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.86rem;
    border: 1.5px solid var(--brick);
    cursor: pointer;
    transition: background-color 0.18s ease, color 0.18s ease;
}

.pb-btn svg {
    width: 15px;
    height: 15px;
    flex-shrink: 0;
}

.pb-btn-read {
    background: var(--brick);
    color: var(--paper);
}

.pb-btn-read:hover {
    background: var(--brick-deep);
}

.pb-btn-download {
    background: transparent;
    color: var(--brick);
}

.pb-btn-download:hover {
    background: var(--brick);
    color: var(--paper);
}

.pb-more-wrap {
    display: flex;
    justify-content: center;
    margin-top: var(--space-4);
}

.pb-load-more {
    padding: 0.8rem 2rem;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--brick);
    background: transparent;
    color: var(--brick);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background-color 0.18s ease, color 0.18s ease;
}

.pb-load-more:hover {
    background: var(--brick);
    color: var(--paper);
}

/* ---------- Details dialog ---------- */

.pb-dialog {
    border: none;
    padding: 0;
    background: transparent;
    max-width: min(760px, calc(100vw - 2rem));
    width: 100%;
    max-height: calc(100dvh - 2rem);
    overflow: visible;
}

.pb-dialog::backdrop {
    background: rgba(17, 17, 17, 0.6);
}

.pb-dialog-box {
    position: relative;
    background: var(--paper);
    border-radius: var(--radius-md);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
    max-height: calc(100dvh - 2rem);
    overflow-y: auto;
}

.pb-dialog-close {
    position: absolute;
    top: 10px;
    right: 12px;
    width: 38px;
    height: 38px;
    border: none;
    border-radius: 50%;
    background: var(--paper-deep);
    color: var(--ink);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    z-index: 2;
}

.pb-dialog-close:hover {
    background: var(--brick-tint-strong);
}

.pb-dialog-body {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: var(--space-4);
    padding: var(--space-4);
}

.pb-dialog-cover {
    width: 100%;
    aspect-ratio: 3 / 4;
    border-radius: 3px 8px 8px 3px;
    overflow: hidden;
    box-shadow: 0 10px 24px rgba(17, 17, 17, 0.22);
    background: var(--paper-deep);
}

.pb-dialog-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pb-dialog-info {
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.pb-dialog-info h2 {
    font-size: 1.6rem;
    margin-bottom: 0.3rem;
    padding-right: 2.5rem;
    overflow-wrap: anywhere;
}

.pb-dialog-author {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.pb-dialog-meta {
    font-size: 0.85rem;
    margin-bottom: var(--space-2);
}

.pb-dialog-desc {
    font-size: 0.97rem;
    line-height: 1.65;
    color: var(--ink);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    margin-bottom: var(--space-3);
    max-height: 40vh;
    overflow-y: auto;
}

.pb-dialog-desc.is-urdu {
    line-height: 2;
}

.pb-dialog-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-top: auto;
}

.pb-dialog-actions .pb-btn {
    flex: 0 1 auto;
    padding: 0.75rem 1.4rem;
    font-size: 0.92rem;
}

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
    .pb-dialog-body {
        grid-template-columns: 1fr;
        padding: var(--space-3);
    }

    .pb-dialog-cover {
        max-width: 180px;
        margin: 0 auto;
    }

    .pb-dialog-info h2 {
        padding-right: 0;
        font-size: 1.35rem;
    }
}

@media (max-width: 600px) {
    .pb-banner {
        padding: var(--space-5) var(--space-2) var(--space-4);
    }

    .pb-toolbar-wrap {
        padding: var(--space-2) var(--space-2) 0;
    }

    .pb-cat-select {
        flex: 1 1 100%;
    }

    .pb-count {
        margin-left: 0;
    }

    .pb-list-section {
        padding: var(--space-3) var(--space-2) var(--space-5);
    }

    .pb-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3) var(--space-2);
    }

    .pb-card-desc {
        -webkit-line-clamp: 2;
    }

    .pb-card-actions {
        flex-direction: column;
    }

    .pb-cover-title {
        font-size: 1rem;
    }
}