:root{
    --bg13-navy:#07153a;
    --bg13-blue:#2563eb;
    --bg13-blue2:#1d4ed8;
    --bg13-teal:#14b8a6;
    --bg13-soft:#f6f9ff;
    --bg13-line:#e2e8f0;
    --bg13-muted:#64748b;
    --bg13-card:#ffffff;
    --bg13-radius:24px;
    --bg13-shadow:0 24px 70px rgba(15,23,42,.10);
}

html{scroll-behavior:smooth}
body{
    background:
        radial-gradient(circle at top right, rgba(37,99,235,.08), transparent 34rem),
        linear-gradient(180deg,#ffffff 0%,#f8fbff 42%,#ffffff 100%) !important;
    color:var(--bg13-navy);
}

.container{max-width:1180px;margin-left:auto;margin-right:auto;padding-left:22px;padding-right:22px}

.site-header.bg-public-header-v13,
.site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(255,255,255,.88)!important;
    border-bottom:1px solid rgba(226,232,240,.85)!important;
    backdrop-filter:blur(18px);
    box-shadow:0 10px 40px rgba(15,23,42,.035);
}

.nav{
    min-height:76px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
}

.brand{
    display:flex;
    align-items:center;
    gap:10px;
    color:var(--bg13-navy)!important;
    font-weight:850;
    text-decoration:none!important;
    letter-spacing:-.04em;
}

.brand span{font-size:1.22rem}
.brand span span{color:var(--bg13-teal)}
.brand-mark{width:38px;height:38px;filter:drop-shadow(0 8px 16px rgba(37,99,235,.16))}

.navlinks{
    display:flex;
    align-items:center;
    gap:8px;
    margin-left:auto;
}

.navlinks a{
    color:#334155!important;
    text-decoration:none!important;
    font-weight:750;
    font-size:.94rem;
    padding:10px 13px;
    border-radius:999px;
}

.navlinks a:hover,
.navlinks a.active{
    color:var(--bg13-blue)!important;
    background:#eff6ff;
}

.nav-actions{
    display:flex;
    align-items:center;
    gap:10px;
}

.bg-nav-icon-v13{
    width:42px;
    height:42px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border:1px solid var(--bg13-line);
    border-radius:999px;
    color:var(--bg13-navy)!important;
    background:#fff;
    text-decoration:none!important;
    box-shadow:0 10px 28px rgba(15,23,42,.05);
}

.bg-mobile-menu-v13{display:none}

.bg-hero-v13{
    padding:52px 0 36px;
}

.bg-hero-card-v13{
    border:1px solid rgba(226,232,240,.95);
    background:linear-gradient(135deg,#ffffff 0%,#f8fbff 55%,#eef6ff 100%);
    border-radius:34px;
    box-shadow:var(--bg13-shadow);
    overflow:hidden;
    position:relative;
}

.bg-hero-grid-v13{
    display:grid;
    grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);
    align-items:center;
    gap:30px;
    padding:48px;
}

.bg-kicker-v13{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:8px 12px;
    border-radius:999px;
    background:#ecfeff;
    color:#0f766e;
    font-weight:850;
    font-size:.86rem;
    margin-bottom:18px;
}

.bg-kicker-v13::before{
    content:"";
    width:9px;height:9px;border-radius:999px;background:var(--bg13-teal);
    box-shadow:0 0 0 6px rgba(20,184,166,.14);
}

.bg-hero-v13 h1{
    margin:0;
    max-width:760px;
    color:var(--bg13-navy);
    font-size:clamp(2.3rem,5vw,4.7rem);
    line-height:1.02;
    letter-spacing:-.07em;
    font-weight:900;
}

.bg-hero-v13 h1 span{
    background:linear-gradient(135deg,var(--bg13-blue),var(--bg13-teal));
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
}

.bg-hero-v13 p{
    margin:18px 0 0;
    max-width:650px;
    color:#475569;
    font-size:1.08rem;
    line-height:1.75;
}

.bg-search-v13{
    margin-top:28px;
    display:flex;
    align-items:center;
    gap:12px;
    background:#fff;
    border:1px solid #dbeafe;
    border-radius:22px;
    padding:10px 10px 10px 18px;
    box-shadow:0 18px 45px rgba(37,99,235,.10);
}

.bg-search-v13 svg{width:22px;height:22px;color:#64748b}
.bg-search-v13 input{
    border:0!important;
    outline:0!important;
    box-shadow:none!important;
    background:transparent!important;
    min-width:0;
    flex:1;
    font-size:1rem;
    color:#0f172a;
}

.bg-search-v13 input::placeholder{color:#94a3b8}

.bg-search-v13 button{
    border:0;
    background:linear-gradient(135deg,var(--bg13-blue),var(--bg13-blue2));
    color:#fff;
    border-radius:16px;
    padding:13px 22px;
    font-weight:850;
    cursor:pointer;
    box-shadow:0 14px 28px rgba(37,99,235,.22);
}

.bg-chip-row-v13{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:18px;
}

.bg-chip-v13{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:10px 14px;
    border:1px solid var(--bg13-line);
    background:rgba(255,255,255,.88);
    color:#1e293b!important;
    border-radius:999px;
    text-decoration:none!important;
    font-weight:800;
    font-size:.88rem;
    box-shadow:0 10px 24px rgba(15,23,42,.04);
}

.bg-chip-v13:hover{border-color:#bfdbfe;color:var(--bg13-blue)!important}

.bg-hero-visual-v13{
    position:relative;
    min-height:345px;
}

.bg-hero-rotator-v13{
    position:relative;
    min-height:345px;
}

.bg-hero-rotator-v13 img{
    position:absolute;
    inset:0;
    width:100%;
    height:100%;
    object-fit:contain;
    opacity:0;
    transform:translateY(14px) scale(.985);
    transition:opacity .75s ease, transform .75s ease;
    filter:drop-shadow(0 24px 45px rgba(15,23,42,.12));
}

.bg-hero-rotator-v13 img.active{
    opacity:1;
    transform:translateY(0) scale(1);
}

.bg-hero-stats-v13{
    position:absolute;
    left:10px;
    right:10px;
    bottom:8px;
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:10px;
}

.bg-hero-stats-v13 div{
    background:rgba(255,255,255,.9);
    border:1px solid rgba(226,232,240,.85);
    border-radius:18px;
    padding:12px;
    box-shadow:0 16px 36px rgba(15,23,42,.08);
}

.bg-hero-stats-v13 strong{
    display:block;
    color:var(--bg13-navy);
    font-size:1.05rem;
}

.bg-hero-stats-v13 small{color:#64748b;font-weight:700}

.bg-section-v13{
    padding:34px 0;
}

.bg-section-head-v13{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:18px;
    margin-bottom:18px;
}

.bg-section-head-v13 h2{
    margin:0;
    font-size:clamp(1.4rem,2vw,2rem);
    line-height:1.16;
    letter-spacing:-.04em;
    color:var(--bg13-navy);
}

.bg-section-head-v13 p{
    margin:6px 0 0;
    color:#64748b;
}

.bg-section-head-v13 a{
    color:var(--bg13-blue)!important;
    font-weight:850;
    text-decoration:none!important;
}

.bg-book-grid-v13,
.grid-books{
    display:grid!important;
    grid-template-columns:repeat(5,minmax(0,1fr));
    gap:18px;
}

.book-card.bg-book-card-v13{
    background:#fff!important;
    border:1px solid rgba(226,232,240,.95)!important;
    border-radius:22px!important;
    overflow:hidden;
    box-shadow:0 14px 34px rgba(15,23,42,.07)!important;
    transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.book-card.bg-book-card-v13:hover{
    transform:translateY(-4px);
    border-color:#bfdbfe!important;
    box-shadow:0 22px 55px rgba(15,23,42,.12)!important;
}

.bg-book-cover-v13{
    position:relative;
    display:block;
    aspect-ratio:3/4;
    background:linear-gradient(135deg,#eff6ff,#f8fafc);
    overflow:hidden;
}

.bg-book-cover-v13 img{
    width:100%;
    height:100%;
    object-fit:cover;
    display:block;
    transition:transform .25s ease;
}

.bg-book-card-v13:hover .bg-book-cover-v13 img{transform:scale(1.035)}

.bg-format-badge-v13{
    position:absolute;
    top:10px;
    left:10px;
    max-width:calc(100% - 20px);
    display:inline-flex;
    align-items:center;
    min-height:26px;
    padding:5px 9px;
    border-radius:999px;
    background:rgba(15,23,42,.90);
    color:#fff;
    font-size:.72rem;
    font-weight:900;
    letter-spacing:.02em;
    backdrop-filter:blur(10px);
    box-shadow:0 10px 22px rgba(15,23,42,.24);
}

.bg-access-badge-v13{
    position:absolute;
    right:10px;
    bottom:10px;
    display:inline-flex;
    min-height:24px;
    padding:5px 8px;
    border-radius:999px;
    background:rgba(255,255,255,.92);
    color:#0f172a;
    font-size:.68rem;
    font-weight:900;
}

.bg-book-body-v13{
    padding:13px;
}

.bg-book-body-v13 h3{
    margin:0;
    min-height:42px;
    color:var(--bg13-navy);
    font-size:.98rem;
    line-height:1.28;
    letter-spacing:-.02em;
}

.bg-book-body-v13 h3 a{
    color:inherit!important;
    text-decoration:none!important;
}

.bg-book-author-v13{
    margin:7px 0 0!important;
    color:#64748b!important;
    font-size:.82rem!important;
    line-height:1.35!important;
    min-height:34px;
}

.bg-book-meta-v13{
    margin-top:10px;
    display:flex;
    flex-wrap:wrap;
    gap:6px;
    color:#64748b;
    font-size:.75rem;
    font-weight:750;
}

.bg-book-actions-v13{
    display:grid;
    grid-template-columns:1fr auto;
    gap:8px;
    margin-top:12px;
}

.bg-book-read-v13,
.bg-book-detail-v13{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:36px;
    border-radius:12px;
    text-decoration:none!important;
    font-size:.79rem;
    font-weight:900;
}

.bg-book-read-v13{
    background:var(--bg13-blue);
    color:#fff!important;
    box-shadow:0 10px 22px rgba(37,99,235,.20);
}

.bg-book-detail-v13{
    border:1px solid var(--bg13-line);
    color:#334155!important;
    background:#fff;
    padding:0 11px;
}

.bg-collections-v13{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:16px;
}

.bg-collection-v13{
    min-height:128px;
    padding:18px;
    border-radius:24px;
    border:1px solid rgba(226,232,240,.95);
    background:linear-gradient(135deg,#ffffff,#f8fbff);
    color:var(--bg13-navy)!important;
    text-decoration:none!important;
    box-shadow:0 14px 34px rgba(15,23,42,.06);
    position:relative;
    overflow:hidden;
}

.bg-collection-v13::after{
    content:"";
    position:absolute;
    right:-28px;
    bottom:-28px;
    width:108px;
    height:108px;
    border-radius:999px;
    background:rgba(37,99,235,.09);
}

.bg-collection-v13 strong{
    display:block;
    font-size:1.05rem;
    letter-spacing:-.03em;
    line-height:1.2;
}

.bg-collection-v13 small{
    display:block;
    margin-top:8px;
    color:#64748b;
    font-weight:800;
}

.bg-benefits-v13{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:14px;
}

.bg-benefit-v13{
    border:1px solid rgba(226,232,240,.95);
    background:#fff;
    border-radius:22px;
    padding:18px;
    box-shadow:0 12px 30px rgba(15,23,42,.05);
}

.bg-benefit-icon-v13{
    width:42px;
    height:42px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:15px;
    background:#eff6ff;
    color:var(--bg13-blue);
    margin-bottom:12px;
}

.bg-benefit-v13 strong{display:block;color:var(--bg13-navy)}
.bg-benefit-v13 p{margin:7px 0 0;color:#64748b;font-size:.9rem;line-height:1.55}

.bg-newsletter-v13{
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(260px,420px);
    align-items:center;
    gap:22px;
    padding:28px;
    border-radius:30px;
    background:linear-gradient(135deg,#0f172a,#1d4ed8);
    color:#fff;
    overflow:hidden;
    position:relative;
}

.bg-newsletter-v13::after{
    content:"";
    position:absolute;
    right:-90px;
    top:-90px;
    width:260px;
    height:260px;
    border-radius:999px;
    background:rgba(45,212,191,.20);
}

.bg-newsletter-v13 h2{margin:0;font-size:1.8rem;letter-spacing:-.04em}
.bg-newsletter-v13 p{margin:8px 0 0;color:#dbeafe;line-height:1.7}

.bg-newsletter-form-v13{
    position:relative;
    z-index:1;
    display:flex;
    gap:10px;
    padding:8px;
    background:rgba(255,255,255,.12);
    border:1px solid rgba(255,255,255,.18);
    border-radius:18px;
    backdrop-filter:blur(10px);
}

.bg-newsletter-form-v13 input{
    flex:1;
    min-width:0;
    border:0;
    outline:0;
    background:#fff;
    border-radius:13px;
    padding:12px 14px;
}

.bg-newsletter-form-v13 button{
    border:0;
    border-radius:13px;
    background:var(--bg13-teal);
    color:#fff;
    font-weight:900;
    padding:12px 16px;
}

.bg-catalog-hero-v13{
    padding:34px 0 18px;
}

.bg-catalog-title-v13{
    border:1px solid rgba(226,232,240,.95);
    border-radius:30px;
    background:linear-gradient(135deg,#fff,#f8fbff);
    box-shadow:var(--bg13-shadow);
    padding:30px;
}

.bg-catalog-title-v13 h1{
    margin:0;
    font-size:clamp(2rem,4vw,3.4rem);
    letter-spacing:-.06em;
    color:var(--bg13-navy);
}

.bg-catalog-title-v13 p{margin:10px 0 0;color:#64748b;line-height:1.7}

.bg-catalog-layout-v13{
    display:grid;
    grid-template-columns:260px minmax(0,1fr);
    gap:24px;
    padding-top:20px;
    padding-bottom:54px;
}

.bg-filter-card-v13{
    align-self:start;
    position:sticky;
    top:96px;
    border:1px solid rgba(226,232,240,.95);
    background:#fff;
    border-radius:24px;
    padding:18px;
    box-shadow:0 18px 44px rgba(15,23,42,.06);
}

.bg-filter-block-v13 + .bg-filter-block-v13{margin-top:20px}
.bg-filter-block-v13 strong{
    display:block;
    margin-bottom:9px;
    color:var(--bg13-navy);
    letter-spacing:-.02em;
}

.bg-filter-row-v13{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    padding:10px 11px;
    border-radius:13px;
    color:#334155!important;
    text-decoration:none!important;
    font-weight:750;
    font-size:.9rem;
}

.bg-filter-row-v13:hover,
.bg-filter-row-v13.active{
    background:#eff6ff;
    color:var(--bg13-blue)!important;
}

.bg-toolbar-v13{
    display:grid;
    grid-template-columns:minmax(220px,1fr) 170px 145px 135px;
    gap:10px;
    margin-bottom:14px;
}

.bg-toolbar-v13 input,
.bg-toolbar-v13 select{
    width:100%;
    border:1px solid var(--bg13-line)!important;
    border-radius:15px!important;
    background:#fff!important;
    padding:12px 13px!important;
    color:#0f172a!important;
    outline:0!important;
    box-shadow:none!important;
}

.bg-result-row-v13{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:12px;
    margin:0 0 16px;
    color:#64748b;
    font-weight:800;
}

.bg-mobile-filter-v13{display:none}

.footer.bg-footer-v13,
.footer{
    background:#07153a!important;
    color:#dbeafe!important;
    margin-top:46px;
}

.bg-footer-grid-v13{
    display:grid;
    grid-template-columns:1.4fr repeat(4,1fr);
    gap:24px;
    padding:44px 0;
}

.bg-footer-v13 .brand,
.footer .brand{color:#fff!important}

.bg-footer-v13 p,
.footer p{color:#bfdbfe!important;line-height:1.7}

.bg-footer-v13 h4,
.footer h4{
    margin:0 0 12px;
    color:#fff!important;
}

.bg-footer-v13 a,
.footer a{
    display:block;
    color:#cbd5e1!important;
    text-decoration:none!important;
    margin:7px 0;
}

.bg-footer-v13 a:hover{color:#fff!important}

.copyright{
    border-top:1px solid rgba(255,255,255,.10)!important;
    color:#93c5fd!important;
    padding:18px 22px!important;
    text-align:center;
}

.bg-mobile-bottom-v13{
    display:none;
}

.book-detail-premium-v91 .cover-badge-v91{
    max-width:calc(100% - 24px);
    white-space:normal;
    text-align:center;
}

.book-detail-premium-v91 .cta-row-v91 .primary span{
    font-weight:900;
}

@media(max-width:1100px){
    .bg-book-grid-v13,
    .grid-books{grid-template-columns:repeat(4,minmax(0,1fr))}
    .bg-benefits-v13{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media(max-width:900px){
    body{padding-bottom:76px}
    .container{padding-left:16px;padding-right:16px}
    .nav{min-height:64px}
    .navlinks{display:none}
    .bg-mobile-menu-v13{display:inline-flex}
    .brand span{font-size:1.05rem}
    .brand-mark{width:32px;height:32px}
    .bg-nav-icon-v13{width:38px;height:38px}
    .bg-hero-v13{padding:18px 0 26px}
    .bg-hero-card-v13{border-radius:26px}
    .bg-hero-grid-v13{
        grid-template-columns:1fr;
        padding:26px 18px 22px;
        gap:22px;
    }
    .bg-hero-v13 h1{font-size:2.38rem;letter-spacing:-.06em}
    .bg-hero-v13 p{font-size:.98rem;line-height:1.65}
    .bg-search-v13{
        border-radius:18px;
        padding:9px;
    }
    .bg-search-v13 button{padding:12px 15px}
    .bg-chip-row-v13{
        flex-wrap:nowrap;
        overflow:auto;
        padding-bottom:6px;
        scrollbar-width:none;
    }
    .bg-chip-row-v13::-webkit-scrollbar{display:none}
    .bg-chip-v13{white-space:nowrap}
    .bg-hero-visual-v13,
    .bg-hero-rotator-v13{min-height:235px}
    .bg-hero-stats-v13{display:none}
    .bg-section-v13{padding:24px 0}
    .bg-section-head-v13{align-items:flex-start}
    .bg-book-grid-v13,
    .grid-books{
        display:flex!important;
        overflow-x:auto;
        gap:14px;
        scroll-snap-type:x mandatory;
        padding:2px 2px 12px;
        scrollbar-width:none;
    }
    .bg-book-grid-v13::-webkit-scrollbar,
    .grid-books::-webkit-scrollbar{display:none}
    .book-card.bg-book-card-v13{
        flex:0 0 164px;
        scroll-snap-align:start;
    }
    .bg-book-body-v13 h3{font-size:.9rem}
    .bg-book-actions-v13{grid-template-columns:1fr}
    .bg-book-detail-v13{display:none}
    .bg-collections-v13{grid-template-columns:repeat(2,minmax(0,1fr))}
    .bg-newsletter-v13{grid-template-columns:1fr;padding:22px;border-radius:24px}
    .bg-newsletter-form-v13{flex-direction:column}
    .bg-catalog-layout-v13{
        grid-template-columns:1fr;
        padding-top:14px;
    }
    .bg-filter-card-v13{display:none}
    .bg-mobile-filter-v13{
        display:block;
        margin-bottom:14px;
    }
    .bg-mobile-filter-v13 summary{
        list-style:none;
        cursor:pointer;
        display:flex;
        align-items:center;
        justify-content:center;
        gap:8px;
        width:100%;
        min-height:46px;
        border-radius:16px;
        border:1px solid var(--bg13-line);
        background:#fff;
        color:var(--bg13-navy);
        font-weight:900;
        box-shadow:0 12px 28px rgba(15,23,42,.06);
    }
    .bg-mobile-filter-v13 summary::-webkit-details-marker{display:none}
    .bg-mobile-filter-panel-v13{
        margin-top:10px;
        border:1px solid var(--bg13-line);
        background:#fff;
        border-radius:20px;
        padding:14px;
        box-shadow:0 18px 40px rgba(15,23,42,.08);
    }
    .bg-toolbar-v13{grid-template-columns:1fr}
    .bg-catalog-grid-mobile-v13.grid-books{
        display:grid!important;
        grid-template-columns:1fr!important;
        overflow:visible;
        padding:0;
    }
    .bg-catalog-grid-mobile-v13 .book-card.bg-book-card-v13{
        display:grid;
        grid-template-columns:96px minmax(0,1fr);
        min-height:142px;
        flex:auto;
    }
    .bg-catalog-grid-mobile-v13 .bg-book-cover-v13{aspect-ratio:auto;height:100%}
    .bg-catalog-grid-mobile-v13 .bg-book-body-v13{padding:12px}
    .bg-catalog-grid-mobile-v13 .bg-book-author-v13{min-height:auto}
    .bg-catalog-grid-mobile-v13 .bg-book-actions-v13{
        grid-template-columns:1fr auto;
        margin-top:10px;
    }
    .bg-catalog-grid-mobile-v13 .bg-book-detail-v13{display:inline-flex}
    .bg-footer-grid-v13{grid-template-columns:1fr 1fr;padding-bottom:34px}
    .bg-mobile-bottom-v13{
        position:fixed;
        left:10px;
        right:10px;
        bottom:10px;
        z-index:70;
        display:grid;
        grid-template-columns:repeat(5,1fr);
        gap:4px;
        padding:8px;
        border:1px solid rgba(226,232,240,.95);
        background:rgba(255,255,255,.92);
        border-radius:22px;
        box-shadow:0 20px 60px rgba(15,23,42,.16);
        backdrop-filter:blur(18px);
    }
    .bg-mobile-bottom-v13 a{
        min-width:0;
        display:flex;
        flex-direction:column;
        align-items:center;
        justify-content:center;
        gap:4px;
        min-height:46px;
        border-radius:15px;
        color:#64748b!important;
        text-decoration:none!important;
        font-size:.68rem;
        font-weight:850;
    }
    .bg-mobile-bottom-v13 a.active,
    .bg-mobile-bottom-v13 a:hover{
        background:#eff6ff;
        color:var(--bg13-blue)!important;
    }
    .bg-mobile-bottom-v13 svg{width:18px;height:18px}
}

@media(max-width:560px){
    .bg-hero-v13 h1{font-size:2.08rem}
    .bg-hero-grid-v13{padding:22px 15px 18px}
    .bg-search-v13{
        display:grid;
        grid-template-columns:auto 1fr;
    }
    .bg-search-v13 button{
        grid-column:1 / -1;
        width:100%;
    }
    .bg-collections-v13{grid-template-columns:1fr}
    .bg-benefits-v13{grid-template-columns:1fr}
    .bg-footer-grid-v13{grid-template-columns:1fr}
}

@media(prefers-reduced-motion:reduce){
    .bg-hero-rotator-v13 img,
    .book-card.bg-book-card-v13,
    .bg-book-cover-v13 img{
        transition:none!important;
        transform:none!important;
    }
}