.tk-book-promo {
    display: none !important;
}

body.single-post .tk-book-promo.tk-book-promo--desktop-only {
    --tk-promo-top: 118px;
    --tk-promo-gap: 24px;
    --tk-promo-width: 220px;
    position: relative;
    z-index: 50;
}

body.single-post .tk-book-promo__rail {
    position: fixed;
    top: var(--tk-promo-top);
    width: var(--tk-promo-width);
    max-height: calc(100vh - var(--tk-promo-top) - 24px);
    z-index: 50;
}

body.single-post .tk-book-promo__rail--left {
    left: var(--tk-promo-gap);
}

body.single-post .tk-book-promo__rail--right {
    right: var(--tk-promo-gap);
}

body.single-post .tk-book-promo__cover-link,
body.single-post .tk-book-promo__button {
    text-decoration: none !important;
}

body.single-post .tk-book-promo__cover-link {
    display: block;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 16px 42px rgba(0,0,0,.22);
    transition: transform .2s ease, box-shadow .2s ease;
}

body.single-post .tk-book-promo__cover-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 52px rgba(0,0,0,.28);
}

body.single-post .tk-book-promo__cover-img {
    display: block;
    width: 100%;
    height: auto;
    margin: 0;
}

body.single-post .tk-book-promo__placeholder {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 310px;
    padding: 22px;
    background: linear-gradient(155deg, #1a1a1a 0%, #050505 100%);
    color: #fff;
}

body.single-post .tk-book-promo__placeholder-small {
    font-size: 10px;
    letter-spacing: .18em;
    opacity: .62;
}

body.single-post .tk-book-promo__placeholder-title {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 28px;
    line-height: 1.02;
    font-weight: 600;
    letter-spacing: -.025em;
}

body.single-post .tk-book-promo__card {
    box-sizing: border-box;
    padding: 22px 20px 20px;
    border: 1px solid rgba(0,0,0,.10);
    border-radius: 12px;
    background: rgba(255,255,255,.97);
    color: #151515;
    box-shadow: 0 14px 42px rgba(0,0,0,.11);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

body.single-post .tk-book-promo__eyebrow {
    margin-bottom: 10px;
    font-size: 10px;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: .16em;
    color: #777;
}

body.single-post .tk-book-promo__title {
    margin-bottom: 12px;
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 24px;
    line-height: 1.08;
    font-weight: 700;
    letter-spacing: -.025em;
}

body.single-post .tk-book-promo__copy {
    margin: 0 0 18px;
    font-size: 13px;
    line-height: 1.55;
    color: #4a4a4a;
}

body.single-post .tk-book-promo__button {
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    width: 100%;
    padding: 12px 13px;
    border-radius: 7px;
    background: #111;
    color: #fff !important;
    font-size: 12px;
    line-height: 1.2;
    font-weight: 700;
    transition: transform .16s ease, opacity .16s ease;
}

body.single-post .tk-book-promo__button:hover {
    transform: translateY(-1px);
    opacity: .9;
}

@media (prefers-reduced-motion: reduce) {
    body.single-post .tk-book-promo__cover-link,
    body.single-post .tk-book-promo__button {
        transition: none !important;
    }
}