.pagina-visor-catalogo {
    min-height: 100vh;
    background: #f3f7f5;
}

.visor-catalogo__contenedor {
    width: min(100% - 2rem, 1300px);
    margin-inline: auto;
    padding: 2rem 0 5rem;
}

.visor-catalogo__volver {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 1.75rem;
    color: var(--color-primary-dark);
    font-weight: 800;
    text-decoration: none;
}

.visor-catalogo__volver:hover {
    color: var(--color-primary);
}

.visor-catalogo__volver:focus-visible,
.visor-libro__boton:focus-visible,
.visor-libro__accion:focus-visible {
    outline: 3px solid rgba(var(--color-primary-rgb), 0.28);
    outline-offset: 4px;
}

.visor-catalogo__cabecera {
    max-width: 820px;
    margin-bottom: 2rem;
}

.visor-catalogo__titulo {
    margin: 0;
    color: var(--color-primary-dark);
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    line-height: 1.03;
}

.visor-catalogo__descripcion {
    max-width: 720px;
    margin: 1rem 0 0;
    color: #4b5753;
    font-size: 1.04rem;
    line-height: 1.75;
}

.visor-catalogo__panel {
    padding: clamp(1rem, 2.4vw, 2rem);
    border: 1px solid #d7e2dd;
    border-radius: 2rem;
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 24px 60px rgba(15, 61, 50, 0.1);
}

.visor-catalogo__panel--error {
    max-width: 760px;
}

.visor-catalogo__subtitulo {
    margin: 0 0 0.75rem;
    color: var(--color-primary-dark);
    font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.visor-catalogo__estado {
    min-height: 1.5rem;
    margin-bottom: 1rem;
    color: #4b5753;
    font-weight: 700;
    text-align: center;
}

.visor-libro-marco {
    position: relative;
    display: grid;
    min-height: 720px;
    place-items: center;
    overflow: hidden;
    padding: 2rem;
    border: 1px solid #d7e2dd;
    border-radius: 1.75rem;
    background:
        radial-gradient(circle at center, #ffffff 0, #eef3f1 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8), 0 20px 52px rgba(15, 61, 50, 0.1);
}

.visor-libro-marco:fullscreen {
    border-radius: 0;
    background: #eef3f1;
}

.visor-libro-marco--error::after {
    content: "";
    position: absolute;
    inset: 1rem;
    border: 1px dashed rgba(var(--color-primary-dark-rgb), 0.25);
    border-radius: 1.25rem;
    pointer-events: none;
}

.visor-libro {
    width: 100%;
    max-width: 1150px;
}

.visor-libro .page {
    background: #ffffff;
    box-shadow: 0 12px 28px rgba(15, 61, 50, 0.16);
}

.visor-libro__controles {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.visor-libro__boton,
.visor-libro__accion {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-height: 2.85rem;
    padding: 0.7rem 1.1rem;
    border: 1px solid rgba(var(--color-primary-rgb), 0.18);
    border-radius: 999px;
    background: #ffffff;
    color: var(--color-primary-dark);
    font-weight: 800;
    text-decoration: none;
    box-shadow: 0 10px 24px rgba(var(--color-primary-dark-rgb), 0.08);
    transition:
        background-color var(--motion-fast) var(--ease-standard),
        border-color var(--motion-fast) var(--ease-standard),
        color var(--motion-fast) var(--ease-standard),
        transform var(--motion-fast) var(--ease-standard),
        box-shadow var(--motion-fast) var(--ease-standard);
}

.visor-libro__boton:hover:not(:disabled),
.visor-libro__accion:hover {
    border-color: rgba(var(--color-primary-rgb), 0.45);
    background: var(--color-primary);
    color: var(--color-primary-contrast);
    transform: translateY(-1px);
    box-shadow: 0 16px 32px rgba(var(--color-primary-dark-rgb), 0.16);
}

.visor-libro__boton:disabled {
    cursor: not-allowed;
    opacity: 0.45;
    box-shadow: none;
}

.visor-libro__indicador {
    min-width: 10rem;
    color: #4b5753;
    font-weight: 800;
    text-align: center;
}

.visor-libro__acciones {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
}

.visor-libro__accion--pdf {
    background: var(--color-primary-dark);
    color: var(--color-primary-dark-contrast);
}

@media (max-width: 900px) {
    .visor-libro-marco {
        min-height: 560px;
        padding: 1rem;
    }

    .visor-libro__controles {
        flex-wrap: wrap;
    }
}

@media (max-width: 560px) {
    .visor-catalogo__contenedor {
        width: min(100% - 1rem, 1300px);
        padding-top: 1rem;
    }

    .visor-catalogo__panel {
        padding: 0.8rem;
        border-radius: 1.25rem;
    }

    .visor-libro-marco {
        min-height: 430px;
        border-radius: 1.1rem;
    }

    .visor-libro__boton,
    .visor-libro__accion {
        width: 100%;
    }

    .visor-libro__indicador {
        order: -1;
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .visor-libro__boton,
    .visor-libro__accion,
    .catalogo-card,
    .catalogo-card__portada img {
        transition-duration: 1ms;
    }
}