h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-brand);
    font-weight: normal;
}


.loading {
    margin: 15px;
    font-size: 1.1rem;
    color: var(--color-text-muted);
}

.ad-slot {
    padding: 15px;
}

.ad-slot::before {
    content: "Ads.";
    display: block;
    margin-bottom: 7px;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.category {
    color: var(--color-danger);
    cursor: pointer;
    user-select: none;
    text-decoration: underline;
}

.book-image {
    width: 175px;
    height: 225px;
    border-radius: 5px;
    box-shadow: 0 16px 32px var(--shadow-color);
    transition: box-shadow 0.3s ease;
}

.detail-container {
    font-size: 1.1em;
    padding: 15px;
}

.share-button {
    display: none;
    margin: 15px;
    padding: 12px 24px;
    border: 0;
    border-radius: 8px;
    background: var(--color-brand);
    color: var(--color-text-inverse);
    cursor: pointer;
    font-size: 1em;
    font-family: inherit;
    transition: background 0.2s ease, transform 0.2s ease;
    box-shadow: 0 16px 32px var(--shadow-color);
}

.share-button:hover {
    background: var(--color-brand-strong);
    transform: translateY(-1px);
}