.pv-publication-viewer {
    width: 100%;
    max-width: 1200px;
    margin: 2rem auto;
    color: #222;
}
.pv-viewer-toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .75rem;
    margin: 0 0 1rem;
}
.pv-viewer-toolbar button {
    cursor: pointer;
    border: 1px solid #d0d0d0;
    border-radius: 4px;
    background: #fff;
    color: #222;
    padding: .45rem .8rem;
    font: inherit;
}
.pv-viewer-toolbar button:disabled {
    opacity: .45;
    cursor: not-allowed;
}
.pv-page-indicator {
    min-width: 5rem;
    text-align: center;
    font-variant-numeric: tabular-nums;
}
.pv-book {
    width: 100%;
    min-height: 420px;
    margin: 0 auto;
    background: #eee;
    box-shadow: 0 8px 28px rgba(0,0,0,.16);
}
.pv-book .stf__parent {
    margin: 0 auto;
}
.pv-publication-viewer:fullscreen {
    background: #eee;
    padding: 1rem;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
}
.pv-publication-viewer:fullscreen .pv-book {
    flex: 1;
}
@media (max-width: 600px) {
    .pv-viewer-toolbar {
        gap: .4rem;
    }
    .pv-viewer-toolbar button {
        padding: .45rem .6rem;
    }
}