:root {
    --bg: #f5f7fb;
    --panel: #ffffff;
    --text: #1d2433;
    --muted: #667085;
    --line: #dde3ee;
    --primary: #274c77;
    --primary-dark: #1d395b;
    --danger: #b42318;
    --radius: 16px;
    --shadow: 0 8px 24px rgba(20, 31, 56, 0.08);
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: var(--bg);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(1180px, calc(100% - 24px)); margin: 0 auto; }
.site-header {
    background: linear-gradient(135deg, #fff, #eef3fb);
    border-bottom: 1px solid var(--line);
    margin-bottom: 18px;
}
.header-flex {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding: 18px 0;
}
h1 { margin: 0 0 6px; font-size: 2rem; }
h2 { margin-top: 0; }
.subtitle, .note { color: var(--muted); }
.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
}
.panel-filters { margin-bottom: 14px; }
.filters-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 0.75fr auto auto;
    gap: 12px;
    align-items: end;
}
label {
    display: block;
    margin-bottom: 6px;
    font-weight: 700;
}
input, select, textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #cfd8e6;
    border-radius: 12px;
    background: #fff;
    font: inherit;
}
textarea { resize: vertical; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: 12px;
    border: 0;
    cursor: pointer;
    font-weight: 700;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-light { background: #edf2f7; color: var(--text); }
.btn-danger { background: #fef3f2; color: var(--danger); }
.btn-block { width: 100%; }

.view-mode-box { min-width: 120px; }
.view-switch {
    display: flex;
    gap: 8px;
    align-items: center;
}
.view-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: #edf2f7;
    color: var(--text);
    font-size: 22px;
    font-weight: 700;
    border: 1px solid var(--line);
}
.view-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.catalogue-meta {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
    margin: 10px 0 14px;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, 148px);
    gap: 14px;
    align-items: start;
}
.book-card {
    width: 148px;
    padding: 7px;
    overflow: hidden;
}
.book-cover-wrap {
    width: 120px;
    height: 180px;
    margin: 0 auto;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
}
.book-cover {
    width: 120px;
    height: 180px;
    object-fit: contain;
    background: #fff;
}
.book-body {
    min-height: 122px;
    padding: 8px 2px 0;
    display: flex;
    flex-direction: column;
}
.book-body h2 {
    font-size: 0.85rem;
    line-height: 1.2;
    height: 2.45em;
    margin: 0 0 6px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.author {
    font-weight: 700;
    font-size: 0.8rem;
    line-height: 1.2;
    height: 2.4em;
    margin: 0 0 6px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.category {
    color: var(--muted);
    font-size: 0.75rem;
    margin: 0 0 8px;
}
.book-footer {
    margin-top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
}
.price { font-weight: 800; font-size: 0.9rem; }
.book-footer .btn { padding: 6px 8px; font-size: 0.75rem; border-radius: 10px; }

.books-list {
    display: grid;
    gap: 10px;
}
.list-book {
    display: grid;
    grid-template-columns: 72px 1fr auto;
    gap: 12px;
    align-items: center;
    padding: 10px 12px;
}
.list-cover-wrap {
    width: 72px;
    height: 96px;
    overflow: hidden;
    border-radius: 10px;
    background: #f1f4f9;
}
.list-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.list-main h2 {
    margin: 0 0 6px;
    font-size: 0.95rem;
    line-height: 1.25;
    max-height: 2.5em;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.list-main .author {
    font-size: 0.85rem;
    margin-bottom: 4px;
}
.list-main .category {
    font-size: 0.78rem;
    margin-bottom: 0;
}
.list-side {
    display: grid;
    gap: 8px;
    justify-items: end;
    text-align: right;
}
.list-side .btn {
    padding: 7px 10px;
    font-size: 0.8rem;
    border-radius: 10px;
}

.pagination {
    margin: 16px 0 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}
.page-link {
    padding: 8px 12px;
    border-radius: 10px;
    background: #eef3fb;
}
.page-link.active {
    background: var(--primary);
    color: #fff;
}
.page-link.disabled {
    opacity: 0.45;
    pointer-events: none;
}
.nav-link {
    font-weight: 700;
}

.cart-list { display: grid; gap: 14px; }
.cart-item {
    display: grid;
    grid-template-columns: 84px 1fr auto;
    gap: 14px;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
}
.cart-item:last-child { border-bottom: 0; }
.cart-cover { width: 84px; height: 112px; object-fit: cover; border-radius: 10px; }
.cart-side { text-align: right; display: grid; gap: 10px; }
.cart-summary, .cart-actions { margin-top: 18px; }
.cart-actions { display: flex; justify-content: space-between; gap: 12px; }
.alert {
    padding: 14px 16px;
    border-radius: 12px;
    margin-bottom: 16px;
}
.alert.success { background: #ecfdf3; color: #027a48; }
.alert.error { background: #fef3f2; color: #b42318; }
.two-cols {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 18px;
}
.checkout-form { display: grid; gap: 10px; }
.mini-line {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid var(--line);
}
.empty-state { text-align: center; padding: 24px; }

@media (max-width: 980px) {
    .filters-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 860px) {
    .two-cols,
    .cart-item,
    .header-flex,
    .catalogue-meta,
    .cart-actions {
        grid-template-columns: 1fr;
        display: grid;
    }
    .header-flex,
    .catalogue-meta,
    .cart-actions { gap: 10px; }
    .cart-side { text-align: left; }
    .cards-grid {
        grid-template-columns: repeat(auto-fill, 144px);
        gap: 12px;
        justify-content: center;
    }
    .book-card {
        width: 144px;
    }
    .list-book {
        grid-template-columns: 60px 1fr;
    }
    .list-cover-wrap {
        width: 60px;
        height: 82px;
    }
    .list-side {
        grid-column: 1 / -1;
        grid-template-columns: 1fr auto;
        justify-items: stretch;
        align-items: center;
        text-align: left;
    }
}

@media (max-width: 580px) {
    .filters-grid {
        grid-template-columns: 1fr;
    }
}

/* --- Panier : mise en évidence des livres déjà ajoutés --- */
.book-card.in-cart,
.list-book.in-cart {
    border-color: var(--primary);
    box-shadow: 0 10px 28px rgba(39, 76, 119, 0.22);
}

.book-card.in-cart {
    position: relative;
}

.list-book.in-cart {
    position: relative;
    background: linear-gradient(90deg, rgba(39, 76, 119, 0.08), #fff 42%);
}

.book-cover-wrap {
    position: relative;
}

.cart-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    font-size: 16px;
    line-height: 1;
    box-shadow: 0 3px 9px rgba(0,0,0,0.22);
}

.list-cart-badge {
    position: static;
    justify-self: end;
}

.btn-added,
.btn-added:disabled {
    background: #e8f1fb;
    color: var(--primary);
    border: 1px solid rgba(39, 76, 119, 0.28);
    cursor: default;
    opacity: 1;
}

/* --- Recherche : loupe cliquable intégrée --- */
.search-input-wrap {
    position: relative;
}
.search-input-wrap input {
    padding-right: 48px;
}
.search-submit {
    position: absolute;
    top: 50%;
    right: 8px;
    width: 34px;
    height: 34px;
    transform: translateY(-50%);
    border: 0;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    font-size: 22px;
    font-weight: 900;
    line-height: 1;
    cursor: pointer;
}
.search-submit:hover {
    background: var(--primary-dark);
}

/* --- Popup fiche livre : esprit 1re / 4e de couverture --- */
.cover-book-box {
    width: min(94vw, 1120px);
    display: grid;
    grid-template-columns: minmax(260px, 0.9fr) minmax(300px, 1fr);
    gap: 18px;
    align-items: stretch;
}
.cover-panel {
    min-height: min(76vh, 680px);
    border-radius: 16px;
    overflow: hidden;
}
.cover-front-panel {
    display: flex;
    flex-direction: column;
    background: #fff;
}
.cover-front-panel img {
    margin: auto;
    max-height: calc(76vh - 70px);
    box-shadow: 0 10px 26px rgba(0,0,0,0.18);
}
.cover-back-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
    background: linear-gradient(145deg, #f8fafc, #ffffff);
    border: 1px solid rgba(255,255,255,0.65);
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.04);
}
.cover-back-inner {
    width: 100%;
    max-width: 420px;
    text-align: center;
}
.cover-back-kicker {
    margin: 0 0 14px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.72rem;
    font-weight: 900;
    opacity: 0.76;
}
.cover-back-panel h2 {
    margin: 0 0 8px;
    font-size: clamp(1.05rem, 2.2vw, 1.55rem);
    line-height: 1.15;
}
.cover-back-author {
    margin: 0 0 22px;
    font-weight: 800;
    opacity: 0.88;
}
.cover-back-text {
    line-height: 1.48;
    white-space: normal;
    text-align: center;
}

@media (max-width: 760px) {
    .cover-book-box {
        grid-template-columns: 1fr;
        max-height: 92vh;
        overflow: auto;
    }
    .cover-panel {
        min-height: auto;
    }
    .cover-front-panel img {
        max-height: 58vh;
    }
    .cover-back-panel {
        min-height: 260px;
        padding: 22px;
    }
}

/* --- Popup résumé : rendu HTML propre depuis ISBNdb --- */
.cover-back-text p {
    margin: 0 0 0.75em;
}
.cover-back-text p:last-child {
    margin-bottom: 0;
}
.cover-back-text ul,
.cover-back-text ol {
    display: inline-block;
    margin: 0.6em auto;
    padding-left: 1.3em;
    text-align: left;
}
.cover-back-text li {
    margin: 0.25em 0;
}
.cover-back-text strong,
.cover-back-text b {
    font-weight: 800;
}

.cover-modal-title{
    display:none;
}

@media (max-width: 900px) {

    .site-header {
        padding-top: 62px;
    }

    .header-flex {
        padding-top: 10px;
    }

    h1 {
        font-size: 1.9rem;
        line-height: 1.1;
    }
}

.page-slider {
    opacity: 0.94;
}

@media (max-width: 900px) {

    .header-flex {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 14px;
        padding-top: 10px;
        flex-wrap: nowrap;
    }

    .header-flex > div {
        flex: 1;
        min-width: 0;
    }

    h1 {
        margin: 0 0 4px;
        font-size: 1.9rem;
        line-height: 1.05;
    }

    .subtitle {
        font-size: 0.95rem;
        line-height: 1.15;
        margin: 0;
    }

    .header-flex .btn {
        white-space: nowrap;
        padding: 12px 18px;
        flex-shrink: 0;
    }
}

.filter-actions {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-actions .btn {
    margin: 0;
}

.view-mode-box {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

@media (max-width: 580px) {

    .filters-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .view-mode-box,
    .filter-actions {
        width: 100%;
    }

    .view-mode-box {
        margin-bottom: -4px;
    }

    .filter-actions {
        flex-wrap: nowrap;
        justify-content: flex-start;
    }
}

/* --- Ligne mobile affichage / par page / actualiser --- */
@media (max-width: 580px) {

    .filters-grid {
        grid-template-columns: 1fr 1fr 1fr;
        align-items: end;
    }

    .search-field-box,
    .filters-grid > div:nth-child(2),
    .filters-grid > div:nth-child(3) {
        grid-column: 1 / -1;
    }

    .par-page-box {
        grid-column: 2;
    }

    .par-page-box select {
        width: 88px;
        min-width: 88px;
        padding: 10px 28px 10px 10px;
    }

    .view-mode-box {
        grid-column: 1;
        min-width: 0;
    }

    .filter-actions {
        grid-column: 3;
        justify-content: flex-end;
        align-items: flex-end;
        display: flex;
    }

    .filter-actions .btn {
        padding: 11px 14px;
        white-space: nowrap;
    }
}


/* --- Correctif final mobile : Recherche/reset + Affichage/Par page/Actualiser sur une ligne --- */
.search-label-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.search-label-line label {
    margin-bottom: 6px;
}



.reset-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 14px;
    border-radius: 10px;
    background: #edf2f7;
    border: 1px solid #d7deea;
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
    transition: all 0.15s ease;
}

.reset-link:hover {
    background: #e2e8f0;
    border-color: #c8d2e2;
}



@media (max-width: 580px) {

    .filters-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .search-field-box,
    .categorie-box,
    .tri-box {
        grid-column: auto;
    }

    .mobile-bottom-row {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 14px;
    }

    .view-mode-box,
    .par-page-box,
    .filter-actions {
        width: auto;
        margin: 0;
    }

    .view-mode-box {
        flex-shrink: 0;
    }

    .par-page-box {
        flex-shrink: 0;
    }

    .par-page-box select {
        width: 86px;
        min-width: 86px;
        padding: 10px 28px 10px 10px;
    }

    .filter-actions {
        margin-left: auto;
    }

    .filter-actions .btn {
        white-space: nowrap;
    }
}

/* --- Restauration affichage desktop --- */
@media (min-width: 581px) {

    .filters-grid {
        grid-template-columns: 2fr 1fr 1fr 0.75fr auto auto;
        align-items: end;
    }

    .search-field-box,
    .categorie-box,
    .tri-box,
    .par-page-box,
    .view-mode-box,
    .filter-actions {
        grid-column: auto;
        width: auto;
        margin: 0;
    }

    .par-page-box select {
        width: 100%;
        min-width: 0;
    }

    .filter-actions {
        display: flex;
        align-items: flex-end;
        justify-content: flex-start;
    }
}

/* --- Correction wrapper mobile : neutre en desktop --- */
@media (min-width: 581px) {
    .mobile-bottom-row {
        display: contents;
    }
}

/* --- Ligne compacte uniquement sur petit écran --- */
@media (max-width: 580px) {
    .mobile-bottom-row {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 12px;
        width: 100%;
    }
}

.facebook-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: #1877f2;
    color: #fff;
    font-size: 30px;
    font-weight: 900;
    font-family: Arial, Helvetica, sans-serif;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(24,119,242,0.25);
    transition: transform 0.15s ease;
}

.facebook-btn:hover {
    transform: translateY(-1px);
}

/* --- Bandeau session expirée --- */
.session-expired-banner {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin: 0 0 18px;
    padding: 14px 18px;
    border-radius: 14px;
    background: linear-gradient(135deg, #fff7ed, #ffedd5);
    border: 1px solid #fdba74;
    color: #9a3412;
    font-weight: 600;
    box-shadow: 0 6px 18px rgba(0,0,0,.08);
}

.session-expired-banner strong {
    color: #7c2d12;
}

@media (max-width: 580px) {
    .session-expired-banner {
        display: block;
        line-height: 1.35;
    }

    .session-expired-banner strong {
        display: block;
        margin-bottom: 4px;
    }
}