/* ---------- Palette helpers for placeholder covers ---------- */
.book-card__cover--terracotta,
.related-card__cover--terracotta,
.book-detail__cover--terracotta {
    background: linear-gradient(155deg, #d98a68 0%, #bf6a4d 55%, #9c4e35 100%);
}

.book-card__cover--olive,
.related-card__cover--olive,
.book-detail__cover--olive {
    background: linear-gradient(155deg, #93a06a 0%, #74804f 55%, #57603a 100%);
}

.book-card__cover--gold,
.related-card__cover--gold,
.book-detail__cover--gold {
    background: linear-gradient(155deg, #e0bd76 0%, #c19a49 55%, #9c7a34 100%);
}

.book-card__cover--ink,
.related-card__cover--ink,
.book-detail__cover--ink {
    background: linear-gradient(155deg, #5a5040 0%, #3a3327 55%, #241f18 100%);
}

/* ---------- Grid & Cards ---------- */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 28px;
}

.book-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.book-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 40px -14px rgba(47, 42, 33, 0.28);
}

.book-card__cover {
    position: relative;
    aspect-ratio: 3 / 4;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: #fff;
}

.book-card__year {
    position: absolute;
    top: 14px;
    inset-inline-start: 14px;
    background: rgba(0, 0, 0, 0.25);
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.book-card__icon {
    position: absolute;
    width: 64px;
    height: 64px;
    fill: none;
    stroke: rgba(255, 255, 255, 0.35);
    stroke-width: 1.4;
    opacity: 0.9;
}

.book-card__title-fa {
    position: relative;
    font-size: 1.35rem;
    font-weight: 700;
    text-align: center;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
    padding: 0 6px;
}

.book-card__body {
    padding: 18px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.book-card__title {
    margin: 0;
    font-size: 1.05rem;
    color: var(--deep-ink);
}

.book-card__title-en {
    margin: 0 0 6px;
    color: var(--ink-soft);
    font-size: 0.8rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    text-align: left;
}

.book-card__excerpt {
    margin: 0;
    color: var(--ink-soft);
    font-size: 0.9rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.book-card__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px dashed var(--border);
    font-size: 0.8rem;
    color: var(--ink-soft);
}

.book-card__more {
    color: var(--terracotta);
    font-weight: 600;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
    display: flex;
    gap: 8px;
    align-items: center;
    color: var(--ink-soft);
    font-size: 0.9rem;
    margin-bottom: 28px;
}

.breadcrumb a:hover {
    color: var(--terracotta);
}

/* ---------- Detail hero ---------- */
.book-detail {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 44px;
    align-items: start;
}

.book-detail__cover {
    border-radius: 20px;
    aspect-ratio: 3 / 4;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: #fff;
    box-shadow: var(--shadow);
    padding: 24px;
}

.book-detail__icon {
    position: absolute;
    width: 84px;
    height: 84px;
    fill: none;
    stroke: rgba(255, 255, 255, 0.3);
    stroke-width: 1.2;
}

.book-detail__cover-title {
    position: relative;
    font-size: 1.6rem;
    font-weight: 800;
    text-align: center;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

.book-detail__genre {
    display: inline-block;
    background: var(--cream-200);
    color: var(--terracotta);
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 14px;
}

.book-detail__title {
    margin: 0 0 4px;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    color: var(--deep-ink);
}

.book-detail__title-en {
    color: var(--ink-soft);
    text-align: left;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 0.85rem;
    margin: 0 0 20px;
}

.book-detail__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    margin: 0 0 20px;
    padding: 18px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.book-detail__meta dt {
    font-size: 0.78rem;
    color: var(--ink-soft);
    margin-bottom: 2px;
}

.book-detail__meta dd {
    margin: 0;
    font-weight: 700;
    color: var(--deep-ink);
}

.book-detail__excerpt {
    color: var(--ink-soft);
    max-width: 60ch;
}

/* ---------- Content sections ---------- */
.book-detail__sections {
    margin-top: 56px;
    display: grid;
    gap: 28px;
    max-width: 74ch;
}

.content-block h2 {
    color: var(--deep-ink);
    font-size: 1.2rem;
    margin: 0 0 10px;
    position: relative;
    padding-inline-start: 16px;
}

.content-block h2::before {
    content: '';
    position: absolute;
    inset-inline-start: 0;
    top: 4px;
    bottom: 4px;
    width: 4px;
    border-radius: 2px;
    background: var(--gold);
}

.content-block p {
    margin: 0;
    color: var(--ink-soft);
}

.content-quote {
    margin: 12px 0 0;
    padding: 22px 26px;
    background: var(--cream-50);
    border-inline-start: 4px solid var(--terracotta);
    border-radius: 12px;
    font-size: 1.1rem;
    color: var(--deep-ink);
    font-weight: 600;
}

/* ---------- Related books ---------- */
.related-books {
    margin-top: 64px;
}

.related-books__title {
    color: var(--deep-ink);
    font-size: 1.3rem;
    margin-bottom: 20px;
}

.related-books__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px;
}

.related-card {
    display: block;
    text-align: center;
}

.related-card__cover {
    aspect-ratio: 3 / 4;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    padding: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 8px;
    transition: transform 0.2s ease;
}

.related-card:hover .related-card__cover {
    transform: translateY(-4px);
}

.related-card p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--ink-soft);
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
    .book-detail {
        grid-template-columns: 1fr;
    }

    .book-detail__cover {
        max-width: 260px;
        margin: 0 auto;
    }

    .book-detail__title-en,
    .book-detail__excerpt {
        text-align: center;
        margin-inline: auto;
    }

    .book-detail__genre {
        display: block;
        width: fit-content;
        margin-inline: auto;
    }

    .book-detail__meta {
        justify-content: center;
        text-align: center;
    }

    .buy-button {
        margin-inline: auto;
    }
}