/* ==========================================================
   BOOKSHELF PAGE
   ========================================================== */

.bookshelf-page {
    background: transparent;
}

.bookshelf-header {
    max-width: var(--content-width);

    margin-bottom: var(--space-2xl);
}

.bookshelf-owner {
    display: flex;

    align-items: center;
    justify-content: space-between;

    gap: var(--space-md);

    margin-bottom: var(--space-sm);
}

.bookshelf-owner__label {
    margin: 0;

    color: var(--color-muted);

    font-size: .95rem;
    font-weight: 600;
    line-height: 1.35;
}

.bookshelf-owner__avatar {
    flex: 0 0 auto;
}

.bookshelf-owner__avatar img {
    display: block;

    width: 72px;
    height: 72px;

    border-radius: 999px;
    border: 1px solid var(--color-border);

    object-fit: cover;

    background: #f3f4f6;
}

.bookshelf-kicker {
    margin: 0 0 var(--space-xs);

    color: var(--color-accent);

    font-size: .85rem;
    font-weight: 700;

    text-transform: uppercase;
    letter-spacing: .08em;
}

.bookshelf-header h1 {
    margin: 0;

    font-size: clamp(2.25rem, 5vw, 4rem);
    line-height: 1;
}

.bookshelf-intro {
    max-width: 56ch;

    margin:
        var(--space-md)
        0
        0;

    color: var(--color-muted);

    font-size: 1.05rem;
    line-height: 1.7;
}

.bookshelf-modes,
.bookshelf-status-filters {
    display: flex;
    flex-wrap: wrap;

    gap: .75rem;

    margin-top: var(--space-lg);
}

.bookshelf-mode-switch,
.bookshelf-status-filter {
    min-height: 40px;

    padding: .55rem .95rem;

    border-radius: 999px;

    font-size: .9rem;
    font-weight: 600;

    color: var(--color-text);
    background: color-mix(in srgb, var(--color-surface) 86%, var(--color-accent-soft) 14%);
    border: 1px solid color-mix(in srgb, var(--color-border) 82%, var(--color-accent) 18%);

    text-decoration: none;

    transition:
        background-color .18s ease,
        border-color .18s ease,
        color .18s ease,
        transform .18s ease;
}

.bookshelf-mode-switch:hover,
.bookshelf-status-filter:hover,
.bookshelf-mode-switch:focus-visible,
.bookshelf-status-filter:focus-visible {
    background: color-mix(in srgb, var(--color-accent-soft) 64%, var(--color-surface) 36%);
    border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-border) 60%);
    color: var(--color-text);
}

.bookshelf-mode-switch.is-active,
.bookshelf-status-filter.is-active {
    background: var(--color-accent);

    color: #fff;

    border-color: transparent;
}

.bookshelf-status-filters {
    margin-top: var(--space-md);
}

.bookshelf-empty {
    padding: var(--space-2xl);

    background: var(--color-surface);

    border-radius: var(--radius-lg);

    box-shadow: var(--shadow-soft);
}

.bookshelf-empty a {
    color: var(--color-accent);

    font-weight: 600;

    text-decoration: underline;
    text-underline-offset: 2px;
}

.bookshelf-empty a:hover {
    opacity: .85;
}

.bookshelf-guest {
    max-width: 720px;

    margin: 0 auto;

    border: 1px solid var(--color-border);

    background:
        linear-gradient(
            145deg,
            var(--color-accent-soft),
            var(--color-surface)
        );
}

.bookshelf-guest__kicker {
    margin: 0 0 .65rem;

    color: var(--color-accent);

    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.bookshelf-guest__title {
    margin: 0;

    font-size: clamp(1.5rem, 2.5vw, 2.1rem);
    line-height: 1.2;
}

.bookshelf-guest__intro {
    margin: 1rem 0 0;

    color: var(--color-muted);

    line-height: 1.65;
}

.bookshelf-guest__benefits {
    margin: 1rem 0 0;
    padding-left: 1.2rem;

    list-style: disc;
    list-style-position: outside;

    color: var(--color-text);

    display: grid;
    gap: .45rem;
}

.bookshelf-guest__actions {
    margin-top: 1.35rem;

    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
}

.bookshelf-guest__actions .rm-button {
    display: inline-flex;

    align-items: center;
    justify-content: center;

    min-width: 160px;

    text-decoration: none;
}

.bookshelf-guest__actions .rm-button--primary {
    color: #fff;
}

.bookshelf-guest__actions .rm-button--secondary {
    color: var(--color-accent);
}

.bookshelf-guest__actions .rm-button:hover,
.bookshelf-guest__actions .rm-button:focus-visible {
    text-decoration: none;
}

@media (max-width: 560px) {
    .bookshelf-guest {
        padding: var(--space-xl);
    }

    .bookshelf-guest__actions {
        flex-direction: column;
    }

    .bookshelf-guest__actions .rm-button {
        width: 100%;
    }
}


/* ==========================================================
   GRID
   ========================================================== */

.bookshelf-list {
    display: grid;

    grid-template-columns:
        repeat(
            auto-fill,
            minmax(190px, 1fr)
        );

    gap: var(--space-xl);

    list-style: none;

    padding: 0;
    margin: 0;
    margin-bottom: var(--space-2xl);
}

.bookshelf-item {
    min-width: 0;
}

.bookshelf-page .product-catalog-results {
    margin-top: var(--space-2xl);
}


/* ==========================================================
   CARD
   ========================================================== */

.bookshelf-card {
    display: flex;
    flex-direction: column;

    min-height: 100%;

    background: var(--color-surface);

    border-radius: var(--radius-lg);

    overflow: visible;

    box-shadow: var(--shadow-soft);

    transition:
        transform .2s ease,
        box-shadow .2s ease;
}

.bookshelf-card:hover {
    transform: translateY(-4px);

    box-shadow: var(--shadow-cover);
}

.bookshelf-page .product-card,
.bookshelf-page .bookshelf-item {
    transition:
        opacity .28s ease,
        transform .28s ease,
        filter .28s ease;
}

.bookshelf-page .product-card.is-shelf-transition-out,
.bookshelf-page .bookshelf-item.is-shelf-transition-out {
    opacity: 0;

    transform: translateY(-12px) scale(.985);

    filter: blur(2px);

    pointer-events: none;
}


/* ==========================================================
   COVER
   ========================================================== */

.bookshelf-cover {
    aspect-ratio: 2 / 3;

    display: flex;

    align-items: center;
    justify-content: center;

    padding: .75rem;
}

.bookshelf-cover img {
    display: block;

    width: auto;
    height: 100%;

    max-width: 80%;

    object-fit: contain;
}

.cover-placeholder {
    width: 100%;
    height: 100%;

    background:
        linear-gradient(
            135deg,
            #f3f4f6,
            #e5e7eb
        );
}

.bookshelf-cover-link {
    display: flex;

    align-items: center;
    justify-content: center;

    width: 100%;
    height: 100%;
}


/* ==========================================================
   META
   ========================================================== */

.bookshelf-meta {
    display: flex;
    flex-direction: column;

    gap: var(--space-xs);

    padding:
        var(--space-md)
        var(--space-md)
        0;
}

.bookshelf-title {
    margin: 0;

    color: var(--color-text);

    font-family: var(--font-body);
    font-size: .98rem;
    font-weight: 800;
    line-height: 1.35;

    overflow-wrap: anywhere;
}

.bookshelf-subtitle,
.bookshelf-author {
    margin: 0;

    color: var(--color-muted);

    font-size: .9rem;
    line-height: 1.45;
}

.bookshelf-subtitle {
    overflow-wrap: anywhere;
}

.bookshelf-title-link {
    color: inherit;

    text-decoration: none;
}

.bookshelf-title-link:hover {
    color: var(--color-accent);
}


/* ==========================================================
   ACTIONS
   ========================================================== */

.bookshelf-page .bookshelf-actions {
    display: flex;
    flex-direction: column;

    gap: var(--space-xs);

    margin-top: auto;

    padding: var(--space-md);
}

.bookshelf-page .bookshelf-action-label {
    margin: 0;

    color: var(--color-muted);

    font-size: .78rem;
    font-weight: 700;

    text-transform: uppercase;
    letter-spacing: .06em;
}

.bookshelf-page .bookshelf-actions button {
    appearance: none;

    border: 0;

    border-radius: var(--radius-md);

    padding:
        .8rem
        1rem;

    font-weight: 700;

    cursor: pointer;

    transition:
        opacity .2s ease,
        transform .2s ease;
}

.bookshelf-page .bookshelf-actions button:hover {
    transform: translateY(-1px);
}

.bookshelf-page .bookshelf-actions button:disabled {
    opacity: .6;

    cursor: wait;
}

.bookshelf-page .js-move-shelf {
    background: var(--color-accent);

    color: #fff;
}

.bookshelf-page .js-remove-from-shelf {
    background: #f3f4f6;

    color: #111827;
}


/* ==========================================================
   HIGHLIGHT
   ========================================================== */

.bookshelf-item.is-highlighted
.bookshelf-card {
    animation:
        bookshelf-highlight
        2s ease;
}

@keyframes bookshelf-highlight {

    0% {
        transform: scale(1);
        box-shadow: var(--shadow-soft);
    }

    25% {
        transform: scale(1.03);
        box-shadow:
            0 0 0 4px rgba(200, 90, 122, .25),
            var(--shadow-cover);
    }

    100% {
        transform: scale(1);
        box-shadow: var(--shadow-soft);
    }
}


/* ==========================================================
   MOBILE
   ========================================================== */

@media (max-width: 640px) {

    .bookshelf-list {
        grid-template-columns: 1fr;

        gap: var(--space-md);
    }

    .bookshelf-header {
        margin-bottom: var(--space-xl);
    }

    .bookshelf-owner__avatar img {
        width: 60px;
        height: 60px;
    }

    .bookshelf-page .bookshelf-actions button {
        font-size: .875rem;
    }
}

@media (max-width: 768px) {

    .bookshelf-list {
        grid-template-columns: 1fr;

        gap: var(--space-md);
    }
}