/* 06. Uma página por vez em telas menores; sem alturas fixas. */
@media (max-width: 859px) {
    .header-edition {
        display: none;
    }
    .reader-toolbar {
        flex-wrap: wrap;
        gap: 14px;
    }
    .volume-navigation {
        order: 3;
        flex-basis: 100%;
    }
    .volume-button {
        flex: 1;
    }
    .site-header {
        padding: 18px 24px;
    }
    .header-caption {
        margin-left: auto;
        max-width: 230px;
        text-align: right;
        letter-spacing: 0.07em;
    }
    .reader {
        max-width: 760px;
        width: 100%;
        padding: 24px 20px 30px;
    }
    .book-spread {
        grid-template-columns: 1fr;
    }
    .page {
        min-height: 590px;
        padding: 25px 34px;
    }
    .page h2 {
        font-size: 3rem;
    }
    .page p {
        font-size: 1.06rem;
    }
    .page:nth-child(even) {
        background: linear-gradient(90deg, #ded5c5, var(--paper) 8%, #efe9de 88%, #d1c6b4);
    }
    .site-footer {
        padding: 22px 24px;
    }
}
@media (max-width: 420px) {
    .cover-scene {
        padding: 28px 22px 32px;
    }
    .brand img {
        width: 60px;
        height: 50px;
    }
    .cover-project-link {
        margin-top: 22px;
    }
    .volume-button {
        padding: 10px 9px;
        font-size: 0.875rem;
    }
    .invitation {
        font-size: 0.75rem;
        letter-spacing: 0.08em;
    }
    .book-cover {
        min-height: 510px;
        padding: 18px 17px 18px 25px;
    }
    .cover-frame {
        min-height: 470px;
        padding: 22px 12px;
    }
    .cover-title-group {
        margin-top: 80px;
    }
    .cover-volume {
        letter-spacing: 0.08em;
    }
    .cover-first-name {
        font-size: 1rem;
        letter-spacing: 0.1em;
    }
    .cover-title-group h1 {
        font-size: 4.9rem;
    }
    .cover-bottom {
        padding-top: 25px;
    }
    .cover-note {
        letter-spacing: 0.03em;
    }
    .reader {
        padding: 20px 14px 28px;
    }
    .page {
        padding: 22px 25px;
    }
    .page h2 {
        font-size: 2.7rem;
    }
    .page-body {
        padding-top: 28px;
    }
    .reader-controls {
        gap: 10px;
        flex-wrap: wrap;
    }
    .page-status {
        width: 100%;
        order: -1;
    }
    .page-button {
        flex: 1;
        padding: 10px 12px;
    }
    .site-footer {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 6px;
        padding: 24px 20px;
        text-align: center;
    }
    .header-caption {
        max-width: 190px;
    }
}

/* Coleção de volumes: tablets e celulares. */
@media (max-width: 1050px) and (min-width: 761px) {
    .book-collection {
        gap: 22px;
    }

    .book-cover {
        padding: 16px 13px 16px 20px;
    }

    .cover-frame {
        padding-inline: 10px;
    }

    .volume-cover-title {
        font-size: 2.8rem;
    }

    .cover-note {
        font-size: 0.6rem;
        letter-spacing: 0.02em;
    }
}

@media (max-width: 760px) {
    .cover-scene {
        padding: 24px 24px 36px;
    }

    .collection-heading {
        margin-bottom: 28px;
    }

    .collection-title {
        font-size: clamp(2.6rem, 7vw, 3.5rem);
    }

    .book-collection {
        grid-template-columns: minmax(0, 1fr);
        gap: 36px;
        max-width: 370px;
    }

    .book-cover {
        min-height: 0;
        padding: 18px 17px 18px 25px;
    }

    .cover-frame,
    .collection-book--work .cover-frame {
        min-height: 430px;
        padding: 24px 14px 22px;
    }

    .cover-title-group {
        margin-top: 54px;
    }

    .cover-volume {
        letter-spacing: 0.2em;
    }

    .cover-first-name {
        font-size: 0.85rem;
        letter-spacing: 0.04em;
    }

    .volume-cover-title {
        font-size: 3.4rem;
    }

    .cover-bottom {
        padding-top: 30px;
    }

    .cover-note {
        letter-spacing: 0.06em;
    }

    .collection-book:hover,
    .collection-book:has(button:focus-visible) {
        translate: none;
    }
}

/* Interação com mouse e preferência escolhida no site. */
@media (hover: hover) and (pointer: fine) {
    html[data-motion='on'] .book-collection:not(.is-opening) .collection-book:hover {
        transform: translateY(-6px) rotate(-1deg);
    }
}

@media (hover: none) {
    .collection-book:has(button:focus-visible) {
        transform: none;
    }
}

html[data-motion='off'] .collection-book,
html[data-motion='off'] .open-button {
    transition: none;
}

html[data-motion='off'] .collection-book:focus-within {
    transform: none;
}

html[data-motion='off'] .book-collection.is-opening .collection-book:not(.is-selected) {
    animation: none;
}