/* पुस्तकें (eBooks) — /books/ hub and /books/<key>/ pages. Trust tokens only (style.css :root), light + dark. */
.sb-bk {
    --bk-head: var(--sb-maroon);
    --bk-ink: var(--sb-gray-800);
    --bk-muted: var(--sb-gray-500);
    --bk-card: var(--sb-white);
    --bk-line: var(--sb-gray-200);
    --bk-soft: var(--sb-cream);
    overflow-x: clip;
    color: var(--bk-ink);
    background: var(--sb-offwhite);
}

[data-theme="dark"] .sb-bk {
    --bk-head: var(--sb-gold-light);
    --bk-muted: var(--sb-gray-600);
}

.sb-bk *,
.sb-bk *::before,
.sb-bk *::after {
    box-sizing: border-box;
}

.sb-bk img {
    max-width: 100%;
    height: auto;
}

.sb-bk p {
    line-height: 1.75;
}

.sb-bk-center {
    text-align: center;
}

.sb-bk .sb-section-header {
    margin-bottom: var(--sb-space-2xl);
}

.sb-bk .sb-section-title {
    color: var(--bk-head);
}

.sb-bk-alt {
    background: var(--bk-soft);
    border-block: 1px solid var(--bk-line);
}

.sb-bk-h2 {
    font-size: var(--sb-text-3xl);
    color: var(--bk-head);
    margin: 0 0 var(--sb-space-md);
    line-height: 1.3;
}

.sb-bk-h2 small {
    font-size: .5em;
    color: var(--bk-muted);
    font-family: var(--sb-font-primary);
}

.sb-bk-h3 {
    font-size: var(--sb-text-2xl);
    color: var(--bk-head);
    margin: 0 0 var(--sb-space-md);
}

/* Icons from the Trust kit */
.sb-bk-ic {
    display: inline-flex;
    flex: 0 0 auto;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
}

.sb-bk-ic .sb-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.sb-bk-ic-sm {
    width: 28px;
    height: 28px;
}

.sb-bk-ic-lg {
    width: 52px;
    height: 52px;
}

.sb-bk-ic-xl {
    width: 76px;
    height: 76px;
}

.sb-bk-ic-inline {
    width: 18px;
    height: 18px;
    vertical-align: -3px;
}

/* Buttons: Trust .sb-btn, a little larger on the book page */
.sb-bk .sb-btn {
    white-space: normal;
    text-align: center;
    line-height: 1.25;
    min-height: 48px;
}

.sb-bk-btn-lg {
    min-height: 54px !important;
    padding: .95rem 1.8rem;
    font-size: var(--sb-text-base);
}

.sb-bk .sb-btn:focus-visible,
.sb-bk a:focus-visible,
.sb-bk summary:focus-visible {
    outline: 3px solid var(--sb-gold);
    outline-offset: 3px;
}

/* Hub header: Trust page header + flip-book mark */
.sb-bk-header .sb-page-header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.sb-bk-header-mark {
    margin: var(--sb-space-md) 0 var(--sb-space-sm);
    filter: drop-shadow(0 8px 18px rgba(255, 107, 0, .35));
}

.sb-bk-header p {
    color: rgba(255, 248, 240, .78);
    max-width: 720px;
}

.sb-bk-header h1 {
    color: #fff8f0;
}

/* Hero: the Trust hero texture (dark → maroon, saffron/gold glow, dot grid) over the book's photo */
.sb-bk-par {
    position: relative;
    isolation: isolate;
    background-color: #1A1209;
    background-image: var(--sb-bk-bg);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.sb-bk-par::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse at 18% 45%, rgba(255, 107, 0, .22) 0%, transparent 52%),
        radial-gradient(ellipse at 82% 18%, rgba(212, 160, 23, .16) 0%, transparent 42%),
        linear-gradient(135deg, rgba(26, 18, 9, .93) 0%, rgba(92, 16, 16, .82) 50%, rgba(26, 18, 9, .94) 100%);
}

.sb-bk-par::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20"><circle cx="10" cy="10" r="0.9" fill="rgba(255,255,255,0.06)"/></svg>');
}

@media (hover: none),
(max-width: 900px),
(prefers-reduced-motion: reduce) {
    .sb-bk-par {
        background-attachment: scroll;
        background-image: var(--sb-bk-bg-s, var(--sb-bk-bg));
    }
}

/* The दीप पूजन hero photo comes from the cover art: zoom past its title and subtitle bands. */
.sb-bk-hero[data-book="deep-poojan"] {
    background-size: auto 175%;
    background-position: 50% 42%;
}

@media (max-aspect-ratio: 4/5) {
    .sb-bk-hero[data-book="deep-poojan"] {
        background-size: auto 130%;
    }
}

.sb-bk-hero {
    color: #fff8f0;
    padding-top: calc(var(--sb-header-height) + var(--sb-space-2xl));
    min-height: min(860px, 96vh);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.sb-bk-hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sb-space-2xl);
    align-items: center;
}

.sb-bk-hero-text {
    text-align: center;
}

.sb-bk-crumb {
    justify-content: center;
    margin-bottom: var(--sb-space-md);
    color: rgba(255, 248, 240, .7);
    flex-wrap: wrap;
    gap: .4rem;
}

.sb-bk-crumb a {
    color: rgba(255, 248, 240, .78);
}

.sb-bk-crumb span:last-child {
    color: var(--sb-saffron-light);
}

.sb-bk-kicker {
    margin-bottom: var(--sb-space-md);
}

.sb-bk .sb-bk-title {
    font-family: var(--sb-font-heading);
    font-size: clamp(2.6rem, 2rem + 4.5vw, 5.2rem);
    line-height: 1.15;
    margin: 0 0 var(--sb-space-sm);
    color: var(--sb-gold-light);
    text-shadow: 0 4px 28px rgba(255, 107, 0, .4);
}

.sb-bk-sub {
    font-family: var(--sb-font-heading);
    font-size: var(--sb-text-xl);
    color: #fff8f0;
    margin: 0 0 var(--sb-space-md);
}

.sb-bk-tag {
    max-width: 580px;
    margin: 0 auto var(--sb-space-md);
    color: rgba(255, 248, 240, .78);
}

.sb-bk-by {
    font-size: var(--sb-text-sm);
    color: rgba(255, 248, 240, .72);
}

.sb-bk-by strong {
    color: #fff8f0;
}

.sb-bk-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sb-space-md);
    justify-content: center;
    margin-top: var(--sb-space-lg);
}

.sb-bk-hero .sb-btn-on-dark {
    color: #fff8f0;
    border-color: rgba(255, 248, 240, .42);
    background: rgba(255, 248, 240, .05);
}

.sb-bk-hero .sb-btn-on-dark:hover {
    color: #fff8f0;
    border-color: var(--sb-gold-light);
    background: rgba(255, 248, 240, .1);
}

/* Book inside the Trust "purpose arch" frame */
.sb-bk-hero-art {
    display: flex;
    justify-content: center;
}

.sb-bk-arch {
    display: flex;
    align-items: center;
    justify-content: center;
    width: min(400px, 88vw);
    padding: var(--sb-space-2xl) var(--sb-space-xl) var(--sb-space-3xl);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 50% 50% 24px 24px;
    background: radial-gradient(circle at 50% 35%, rgba(255, 107, 0, .28), rgba(92, 16, 16, .35) 45%, rgba(13, 10, 5, .55) 75%);
    box-shadow: inset 0 0 80px rgba(255, 107, 0, .08), 0 24px 70px rgba(0, 0, 0, .25);
    perspective: 1400px;
}

.sb-bk-book {
    position: relative;
    width: min(220px, 56vw);
    margin-top: var(--sb-space-lg);
}

.sb-bk-book::after {
    content: "";
    position: absolute;
    left: 8%;
    right: 2%;
    bottom: -24px;
    height: 28px;
    background: radial-gradient(ellipse at center, rgba(0, 0, 0, .55), transparent 70%);
    filter: blur(4px);
    z-index: -1;
}

.sb-bk-book-3d {
    position: relative;
    transform: rotateY(-18deg) rotateX(4deg);
    transform-style: preserve-3d;
    transition: transform .6s cubic-bezier(.2, .7, .2, 1);
    border-radius: 2px 6px 6px 2px;
    box-shadow: 18px 22px 40px rgba(0, 0, 0, .55), 0 0 60px rgba(212, 160, 23, .28);
}

.sb-bk-book-3d::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 7%;
    z-index: 1;
    pointer-events: none;
    border-radius: 2px 0 0 2px;
    background: linear-gradient(90deg, rgba(0, 0, 0, .45), rgba(255, 255, 255, .18) 45%, rgba(0, 0, 0, .25));
}

.sb-bk-book-3d::after {
    content: "";
    position: absolute;
    top: 1.5%;
    bottom: 1.5%;
    right: -12px;
    width: 12px;
    transform: rotateY(90deg);
    transform-origin: left center;
    border-radius: 0 2px 2px 0;
    background: repeating-linear-gradient(180deg, #f6eddc 0 2px, #e2d4bb 2px 3px);
}

.sb-bk-book img {
    display: block;
    width: 100%;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    border-radius: 2px 6px 6px 2px;
}

.sb-bk-hero-art:hover .sb-bk-book-3d {
    transform: rotateY(-6deg) rotateX(2deg);
}

.sb-bk-jump {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px 22px;
    margin-top: var(--sb-space-3xl);
    padding: 10px 20px;
    border-top: 1px solid rgba(240, 199, 94, .22);
    background: rgba(13, 10, 5, .35);
}

.sb-bk-jump a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    color: rgba(255, 248, 240, .82);
    font-size: var(--sb-text-sm);
    font-weight: 600;
    text-decoration: none;
}

.sb-bk-jump a:hover {
    color: var(--sb-gold-light);
}

/* Facts strip */
.sb-bk-facts {
    background: linear-gradient(135deg, var(--sb-maroon-dark), var(--sb-maroon));
    color: #fff8f0;
}

.sb-bk-facts ul {
    list-style: none;
    margin: 0 auto;
    padding-block: var(--sb-space-sm);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
}

.sb-bk-facts li {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 18px 6px;
    text-align: center;
}

.sb-bk-facts .sb-bk-ic {
    width: 46px;
    height: 46px;
    padding: 6px;
    border-radius: 50%;
    background: #fff8f0;
    box-shadow: 0 0 0 4px rgba(240, 199, 94, .18);
}

.sb-bk-facts strong {
    font-family: var(--sb-font-heading);
    font-size: var(--sb-text-2xl);
    line-height: 1.2;
    color: var(--sb-gold-light);
}

.sb-bk-facts span {
    font-size: var(--sb-text-sm);
    color: rgba(255, 248, 240, .82);
}

/* About */
.sb-bk-about {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sb-space-2xl);
}

.sb-bk-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--sb-space-sm);
}

.sb-bk-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--sb-space-md);
    padding: 14px 16px;
    background: var(--bk-card);
    border: 1px solid var(--bk-line);
    border-radius: var(--sb-radius-lg);
}

/* Chapters */
.sb-bk-part {
    margin-top: var(--sb-space-2xl);
}

.sb-bk-part-h {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: var(--sb-text-xl);
    color: var(--bk-head);
    margin: 0 0 var(--sb-space-sm);
}

.sb-bk-part-h::after {
    content: "";
    flex: 1 1 auto;
    height: 1px;
    background: var(--bk-line);
}

.sb-bk-part-note {
    color: var(--bk-muted);
    font-size: var(--sb-text-sm);
}

.sb-bk-chapters {
    list-style: none;
    margin: var(--sb-space-md) 0 0;
    padding: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sb-space-md);
}

.sb-bk-ch {
    display: flex;
    gap: var(--sb-space-md);
    align-items: flex-start;
    padding: var(--sb-space-lg);
    background: var(--bk-card);
    border: 1px solid var(--bk-line);
    border-radius: var(--sb-radius-xl);
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.sb-bk-ch:hover {
    transform: translateY(-3px);
    border-color: var(--sb-gold-light);
    box-shadow: 0 14px 30px rgba(92, 16, 16, .1);
}

.sb-bk-ch h4 {
    font-size: var(--sb-text-lg);
    color: var(--bk-head);
    margin: 0 0 4px;
    line-height: 1.35;
}

.sb-bk-ch p {
    margin: 0;
    font-size: var(--sb-text-sm);
    color: var(--bk-muted);
}

.sb-bk-ch-n {
    display: inline-block;
    font-size: var(--sb-text-xs);
    font-weight: 700;
    letter-spacing: .08em;
    color: var(--sb-saffron);
}

/* Quote band */
.sb-bk-band {
    padding: clamp(80px, 12vw, 160px) 0;
    text-align: center;
    color: #fff8f0;
}

.sb-bk-band figure {
    margin: 0 auto;
    max-width: 860px;
}

.sb-bk-band blockquote {
    margin: 0;
    padding: 0;
    border: 0;
    font-family: var(--sb-font-heading);
    font-size: clamp(1.4rem, 1.1rem + 1.6vw, 2.15rem);
    line-height: 1.55;
    color: #fff8f0;
}

.sb-bk-band blockquote p::before {
    content: "“";
    display: block;
    font-size: 2.4em;
    line-height: .6;
    color: var(--sb-gold-light);
}

.sb-bk-band figcaption {
    margin-top: 10px;
    color: var(--sb-gold-light);
    font-size: var(--sb-text-sm);
}

/* Sample */
.sb-bk-sample {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sb-space-md);
    text-align: center;
    padding: var(--sb-space-xl);
    border: 1px dashed var(--sb-gold);
    border-radius: 20px;
    background: linear-gradient(135deg, var(--sb-cream), var(--sb-white));
}

.sb-bk-sample p {
    margin: 0;
    color: var(--bk-muted);
}

.sb-bk-sample .sb-bk-h3 {
    margin-bottom: 4px;
}

/* Buy */
.sb-bk-buy-sec {
    background: radial-gradient(1100px 480px at 20% 0%, var(--sb-cream) 0%, var(--sb-offwhite) 62%);
}

.sb-bk-buy {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sb-space-2xl);
    align-items: center;
}

.sb-bk-buy-art {
    display: flex;
    justify-content: center;
}

.sb-bk-buy-art img {
    width: min(240px, 60vw);
    border-radius: 6px;
    box-shadow: 0 24px 50px rgba(26, 18, 9, .28);
}

.sb-bk-buy-box {
    padding: clamp(22px, 3vw, 36px);
    background: var(--bk-card);
    border: 1px solid var(--bk-line);
    border-top: 4px solid var(--sb-saffron);
    border-radius: 22px;
    box-shadow: 0 20px 50px rgba(92, 16, 16, .1);
}

.sb-bk-price {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px 14px;
    margin: 0 0 var(--sb-space-md);
}

.sb-bk-price strong {
    font-family: var(--sb-font-heading);
    font-size: 2.9rem;
    line-height: 1;
    color: var(--bk-head);
}

.sb-bk-price span {
    font-size: var(--sb-text-sm);
    font-weight: 600;
    color: var(--sb-success);
}

[data-theme="dark"] .sb-bk-price span {
    color: #7bd389;
}

.sb-bk-buy-box .sb-bk-list li {
    padding: 10px 12px;
    background: var(--bk-soft);
}

.sb-bk-buy-main {
    margin-top: var(--sb-space-lg);
    min-height: 58px !important;
    font-size: var(--sb-text-lg);
}

.sb-bk-pay-note {
    margin: var(--sb-space-md) 0 0;
    font-size: var(--sb-text-sm);
    color: var(--bk-muted);
}

.sb-bk-pay-note a {
    color: var(--sb-saffron-dark);
}

[data-theme="dark"] .sb-bk-pay-note a {
    color: var(--sb-saffron-light);
}

.sb-bk-stores {
    margin-top: var(--sb-space-md);
    padding-top: var(--sb-space-md);
    border-top: 1px solid var(--bk-line);
}

.sb-bk-stores-h {
    font-size: var(--sb-text-sm);
    font-weight: 700;
    color: var(--bk-muted);
    margin: 0 0 10px;
}

.sb-bk-stores ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.sb-bk-store {
    display: inline-flex;
    align-items: center;
    min-height: 46px;
    padding: 8px 16px;
    border-radius: 12px;
    background: #1d1d1f;
    color: #fff;
    font-weight: 600;
    text-decoration: none;
}

.sb-bk-store:hover {
    color: #fff;
    background: #000;
}

.sb-bk-steps-wrap {
    margin-top: var(--sb-space-3xl);
}

/* Buy steps */
.sb-bk-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--sb-space-md);
    counter-reset: none;
}

.sb-bk-steps li {
    display: flex;
    gap: var(--sb-space-md);
    align-items: flex-start;
    padding: var(--sb-space-lg);
    background: var(--bk-card);
    border: 1px solid var(--bk-line);
    border-radius: var(--sb-radius-xl);
}

.sb-bk-steps li>div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sb-bk-steps strong {
    color: var(--bk-head);
    font-family: var(--sb-font-heading);
    font-size: var(--sb-text-lg);
}

.sb-bk-steps span {
    color: var(--bk-muted);
    font-size: var(--sb-text-sm);
}

.sb-bk-step-n {
    flex: 0 0 auto;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--sb-saffron), var(--sb-saffron-dark));
    color: #fff !important;
    font-weight: 700;
    font-size: 1rem !important;
}

/* Publisher */
.sb-bk-pub-wrap {
    max-width: 920px;
    text-align: center;
}

/* Author and publisher: two separate cards */
.sb-bk-credits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--sb-space-md);
    margin-bottom: var(--sb-space-md);
    text-align: left;
}

.sb-bk-credit {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px;
    border: 1px solid var(--bk-line);
    border-radius: 16px;
    background: var(--sb-white);
}

.sb-bk-credit-ic,
.sb-bk-credit-ic .sb-icon {
    flex: 0 0 auto;
    width: 64px;
    height: auto;
}

.sb-bk-credit .sb-section-label {
    margin-bottom: 4px;
}

.sb-bk-credit .sb-bk-h3 {
    margin: 0 0 6px;
}

.sb-bk-credit p {
    margin: 0;
    font-size: var(--sb-text-sm);
    color: var(--bk-muted);
}

.sb-bk-pub-meta {
    margin: 0 0 8px;
}

.sb-bk-note {
    font-size: var(--sb-text-sm);
    color: var(--bk-muted);
}

/* Shelf cards */
.sb-bk-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sb-space-lg);
}

.sb-bk-card {
    display: flex;
    gap: var(--sb-space-md);
    padding: var(--sb-space-md);
    background: var(--bk-card);
    border: 1px solid var(--bk-line);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(92, 16, 16, .08);
    transition: transform .2s ease, box-shadow .2s ease;
}

.sb-bk-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 40px rgba(92, 16, 16, .14);
}

.sb-bk-card-cover {
    flex: 0 0 auto;
    width: 112px;
}

.sb-bk-card-img {
    display: block;
    width: 100%;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    border-radius: 3px 8px 8px 3px;
    box-shadow: 6px 8px 18px rgba(26, 18, 9, .28);
}

.sb-bk-card-body {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}

.sb-bk-card-title {
    font-size: var(--sb-text-xl);
    margin: 0;
    line-height: 1.3;
}

.sb-bk-card-title a {
    color: var(--bk-head);
    text-decoration: none;
}

.sb-bk-card-title a:hover {
    color: var(--sb-saffron);
}

.sb-bk-card-sub {
    margin: 0;
    font-size: var(--sb-text-sm);
    color: var(--bk-ink);
    line-height: 1.55 !important;
}

.sb-bk-card-meta {
    margin: 0;
    font-size: var(--sb-text-xs);
    color: var(--bk-muted);
}

.sb-bk-card-note {
    margin: 0;
    font-size: var(--sb-text-xs);
    color: var(--bk-muted);
    font-style: italic;
}

.sb-bk-card-act {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px 14px;
    margin-top: auto;
    padding-top: 6px;
}

.sb-bk-card .sb-bk-buy {
    padding: .7rem 1.1rem;
    min-height: 44px;
    white-space: nowrap;
}

.sb-bk-more {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    gap: 6px;
    font-weight: 600;
    color: var(--sb-saffron-dark);
    text-decoration: none;
}

[data-theme="dark"] .sb-bk-more {
    color: var(--sb-saffron-light);
}

.sb-bk-badge {
    align-self: flex-start;
    padding: 4px 10px;
    border-radius: var(--sb-radius-full);
    background: rgba(255, 107, 0, .12);
    border: 1px solid rgba(255, 107, 0, .35);
    color: var(--sb-saffron-dark);
    font-size: var(--sb-text-xs);
    font-weight: 700;
}

[data-theme="dark"] .sb-bk-badge {
    color: var(--sb-saffron-light);
}

.sb-bk-wait {
    font-size: var(--sb-text-sm);
    color: var(--bk-muted);
}

.sb-bk-card.is-soon .sb-bk-card-img {
    filter: saturate(.92);
}

.sb-bk-all {
    margin-top: var(--sb-space-xl);
}

/* FAQ */
.sb-bk-faq-item {
    margin-bottom: 10px;
    background: var(--bk-card);
    border: 1px solid var(--bk-line);
    border-radius: var(--sb-radius-lg);
}

.sb-bk-faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 56px;
    padding: 12px 18px;
    cursor: pointer;
    font-weight: 700;
    color: var(--bk-head);
    list-style: none;
}

.sb-bk-faq-item summary::-webkit-details-marker {
    display: none;
}

.sb-bk-faq-item summary b::before {
    content: "+";
    font-size: 22px;
    color: var(--sb-saffron);
}

.sb-bk-faq-item[open] summary b::before {
    content: "−";
}

.sb-bk-faq-item p {
    margin: 0;
    padding: 0 18px 16px;
    color: var(--bk-muted);
}

/* Mobile sticky buy bar (book page) */
.sb-bk-sticky {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: calc(var(--sb-z-sticky) - 1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 16px;
    padding-bottom: max(10px, env(safe-area-inset-bottom));
    background: linear-gradient(135deg, rgba(26, 18, 9, .97), rgba(92, 16, 16, .97));
    color: #fff8f0;
    font-size: var(--sb-text-sm);
    box-shadow: 0 -8px 24px rgba(26, 18, 9, .2);
    visibility: hidden;
    transform: translateY(110%);
    transition: transform .3s ease, visibility 0s linear .3s;
}

.sb-bk-sticky.is-on {
    visibility: visible;
    transform: none;
    transition: transform .3s ease, visibility 0s;
}

.sb-bk-sticky[hidden] {
    display: none;
}

.sb-bk-sticky>span {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.sb-bk-sticky strong {
    color: var(--sb-gold-light);
    font-family: var(--sb-font-heading);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sb-bk-sticky .sb-btn {
    min-height: 44px;
    padding: .55rem 1.1rem;
    flex: 0 0 auto;
    width: auto !important;
    white-space: nowrap;
}

/* Keep the theme's back-to-top button above the sticky bar. */
body.sb-bk-sticky-on .sb-scroll-top {
    bottom: calc(76px + env(safe-area-inset-bottom));
}

/* Reveal (JS adds .sb-bk-js) */
.sb-bk.sb-bk-js .sb-bk-rv {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .7s ease, transform .7s ease;
}

.sb-bk.sb-bk-js .sb-bk-rv.is-in {
    opacity: 1;
    transform: none;
}

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

    .sb-bk.sb-bk-js .sb-bk-rv,
    .sb-bk-book-3d,
    .sb-bk-ch,
    .sb-bk-card,
    .sb-bk-sticky {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

@media (max-width: 420px) {
    .sb-bk-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .sb-bk-card-cover {
        width: 140px;
    }

    .sb-bk-card-act,
    .sb-bk-badge {
        justify-content: center;
        align-self: center;
    }

    .sb-bk-card-act {
        align-items: center;
    }
}

@media (min-width: 640px) {
    .sb-bk-facts ul {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .sb-bk-chapters {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sb-bk-sample {
        flex-direction: row;
        text-align: left;
    }

    .sb-bk-sample>div {
        flex: 1 1 auto;
    }

    .sb-bk-card-cover {
        width: 132px;
    }
}

@media (min-width: 960px) {
    .sb-bk-hero-grid {
        grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
        gap: var(--sb-space-3xl);
    }

    .sb-bk-hero-text {
        text-align: left;
    }

    .sb-bk-crumb {
        justify-content: flex-start;
    }

    .sb-bk-tag {
        margin-inline: 0;
    }

    .sb-bk-cta {
        justify-content: flex-start;
    }

    .sb-bk-book {
        width: 280px;
    }

    .sb-bk-about {
        grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
        gap: var(--sb-space-3xl);
    }

    .sb-bk-chapters {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .sb-bk-buy {
        grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
        gap: var(--sb-space-3xl);
    }

    .sb-bk-buy-art img {
        width: 280px;
    }

    .sb-bk-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sb-bk-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .sb-bk-steps li {
        flex-direction: column;
    }

    .sb-bk-sticky {
        display: none !important;
    }
}