.blaetterkatalog {
    --blaetterkatalog-ratio: 0.707;
    --blaetterkatalog-controls: 64px;
    position: relative;
    outline: none;
}

/* Buch so begrenzen, dass eine Doppelseite komplett in den Viewport passt */
.blaetterkatalog__stage {
    position: relative;
    width: min(100%, calc((100vh - var(--blaetterkatalog-controls) - 120px) * var(--blaetterkatalog-ratio) * 2));
    min-height: 200px;
    margin: 0 auto;
}

.blaetterkatalog__page {
    background: #fff;
    overflow: hidden;
}

.blaetterkatalog__page canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.blaetterkatalog__status {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #666;
}

.blaetterkatalog__status::before {
    content: '';
    width: 1.25em;
    height: 1.25em;
    margin-right: .5em;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: blaetterkatalog-spin .8s linear infinite;
}

.blaetterkatalog.has-error .blaetterkatalog__status::before {
    display: none;
}

@keyframes blaetterkatalog-spin {
    to { transform: rotate(360deg); }
}

.blaetterkatalog__controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: .5rem 1rem;
    min-height: var(--blaetterkatalog-controls);
    padding: .75rem 0;
}

.blaetterkatalog__controls button,
.blaetterkatalog__controls a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    padding: 0 .75rem;
    border: 1px solid currentColor;
    border-radius: 2px;
    background: transparent;
    color: inherit;
    font: inherit;
    text-decoration: none;
    cursor: pointer;
}

.blaetterkatalog__controls button:hover,
.blaetterkatalog__controls a:hover {
    background: rgba(0, 0, 0, .06);
}

.blaetterkatalog__indicator {
    min-width: 6em;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* Steuerung erst zeigen, wenn die PDF geladen ist */
.blaetterkatalog:not(.is-ready) [data-action] {
    visibility: hidden;
}

/* Vollbild (native API und CSS-Fallback für iOS) */
.blaetterkatalog.is-fullscreen {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1rem;
    background: #222;
    color: #fff;
}

.blaetterkatalog.is-fullscreen .blaetterkatalog__stage {
    width: min(100%, calc((100vh - var(--blaetterkatalog-controls) - 2rem) * var(--blaetterkatalog-ratio) * 2));
}

.blaetterkatalog.is-fullscreen .blaetterkatalog__controls button:hover,
.blaetterkatalog.is-fullscreen .blaetterkatalog__controls a:hover {
    background: rgba(255, 255, 255, .12);
}

html.blaetterkatalog-noscroll {
    overflow: hidden;
}

/* Übersicht: Teaser im Originalformat, Platzhalter im Hochformat (A4) */
.blaetterkatalog-tile__cover {
    position: relative;
    display: block;
    overflow: hidden;
    background: #eee;
}

.blaetterkatalog-tile__cover img {
    display: block;
    width: 100%;
    height: auto;
    transition: transform .4s ease;
}

.blaetterkatalog-tile__cover:hover img,
.blaetterkatalog-tile__cover:focus img {
    transform: scale(1.04);
}

.blaetterkatalog-tile__placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 210 / 297;
    padding: 1.5rem;
    text-align: center;
    color: #555;
}