body {
    margin: 0;
    background: #0b1f46;
    color: #fff;
}

.viewer-toolbar {
    display: flex;
    gap: .45rem;
    flex-wrap: wrap;
    align-items: center;
    padding: .6rem;
    background: #102b61;
    border-bottom: 2px solid #c9a847;
    z-index: 20;
}

.viewer-wrap {
    padding: 1rem;
}

.canvas-wrap {
    overflow: auto;
    text-align: center;
    max-height: calc(100vh - 90px);
    cursor: grab;
}

#pdfCanvas {
    max-width: 100%;
    background: #fff;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .35);
}

.thumb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: .8rem;
}

.thumb-canvas {
    width: 100%;
    border: 2px solid #fff;
    cursor: pointer;
}