#powerPointViewerTool .drop-zone {
    border: 2px dashed #9fb6ce;
    border-radius: 0.75rem;
    background: #f7fafc;
    padding: 1.25rem;
    text-align: center;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

#powerPointViewerTool .drop-zone.is-dragover {
    border-color: #0d6efd;
    background: #e8f1ff;
}

#powerPointViewerTool .thumb-list {
    max-height: min(70vh, 860px);
    overflow: auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.6rem;
    padding-right: 0.2rem;
}

#powerPointViewerTool .thumb-btn {
    text-align: left;
    border: 1px solid #d8dee5;
    border-radius: 0.6rem;
    padding: 0.6rem;
    background: #fff;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#powerPointViewerTool .thumb-btn:hover,
#powerPointViewerTool .thumb-btn:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.15rem rgba(13, 110, 253, 0.15);
}

#powerPointViewerTool .thumb-btn.is-active {
    border-color: #198754;
    box-shadow: 0 0 0 0.16rem rgba(25, 135, 84, 0.2);
}

#powerPointViewerTool .thumb-number {
    font-size: 0.82rem;
    color: #6c757d;
}

#powerPointViewerTool .thumb-title {
    font-weight: 600;
    font-size: 0.92rem;
    margin: 0.1rem 0 0.25rem 0;
}

#powerPointViewerTool .thumb-preview {
    font-size: 0.84rem;
    color: #4c5561;
}

#powerPointViewerTool .thumb-image {
    width: 100%;
    border: 1px solid #e5e7eb;
    border-radius: 0.45rem;
    margin-top: 0.45rem;
}

#powerPointViewerTool .toolbar-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
}

#powerPointViewerTool .viewer-stage {
    border: 1px solid #d9e0e7;
    border-radius: 0.75rem;
    background: #eff3f7;
    height: min(72vh, 920px);
    overflow: auto;
    padding: 0.9rem;
}

#powerPointViewerTool .slide-canvas {
    width: 960px;
    min-height: 540px;
    background: #fff;
    border: 1px solid #d2d9e1;
    border-radius: 0.65rem;
    box-shadow: 0 0.45rem 1.25rem rgba(33, 37, 41, 0.08);
    padding: 1rem;
    transform-origin: top left;
}

#powerPointViewerTool .slide-title {
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 0.7rem;
}

#powerPointViewerTool .slide-flags {
    margin-bottom: 0.5rem;
}

#powerPointViewerTool .slide-image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.6rem;
    margin-bottom: 0.75rem;
}

#powerPointViewerTool .slide-image-grid img {
    width: 100%;
    border-radius: 0.45rem;
    border: 1px solid #e5e7eb;
    background: #f8fafc;
}

#powerPointViewerTool .slide-text {
    line-height: 1.45;
    word-break: break-word;
}

#powerPointViewerTool .slide-line {
    margin-bottom: 0.6rem;
    white-space: pre-wrap;
}

#powerPointViewerTool .slide-run {
    white-space: pre-wrap;
}

#powerPointViewerTool .slide-bullet {
    font-weight: 700;
    margin-right: 0.2rem;
}

#powerPointViewerTool .slide-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.75rem 0;
    background: rgba(255, 255, 255, 0.85);
}

#powerPointViewerTool .slide-table td {
    border: 1px solid #c8d0d9;
    padding: 0.4rem 0.6rem;
    vertical-align: top;
}

#powerPointViewerTool .slide-table .slide-table-line {
    margin-bottom: 0.2rem;
}

#powerPointViewerTool .slide-table .slide-table-line:last-child {
    margin-bottom: 0;
}

#powerPointViewerTool .slide-layout-outer {
    position: relative;
    width: 100%;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

#powerPointViewerTool .slide-layout {
    position: relative;
    transform-origin: top left;
    border: 1px solid #d2d9e1;
    background: #fff;
    font-size: 18pt;
    line-height: 1.25;
}

#powerPointViewerTool .layout-shape {
    position: absolute;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

#powerPointViewerTool .layout-shape .slide-line {
    margin-bottom: 0.15em;
    white-space: pre-wrap;
}

#powerPointViewerTool .layout-shape-image img {
    width: 100%;
    height: 100%;
    object-fit: fill;
}

#powerPointViewerTool .layout-shape-table .slide-table {
    margin: 0;
    width: 100%;
}

#powerPointViewerTool .layout-placeholder {
    align-items: center;
    justify-content: center;
    border: 2px dashed #9fb6ce;
    color: #6c757d;
    font-size: 14pt;
    background: rgba(255, 255, 255, 0.6);
}

#powerPointViewerTool .slide-notes-wrap {
    border-top: 1px solid #e5e7eb;
    margin-top: 0.8rem;
    padding-top: 0.75rem;
}

#powerPointViewerTool .slide-notes {
    white-space: pre-wrap;
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    border-radius: 0.55rem;
    padding: 0.7rem;
}

#powerPointViewerTool .meta-key {
    color: #6c757d;
}

#powerPointViewerTool .meta-value {
    font-weight: 600;
    word-break: break-word;
}

@media (max-width: 1399.98px) {
    #powerPointViewerTool .slide-canvas {
        width: 900px;
    }
}

@media (max-width: 1199.98px) {
    #powerPointViewerTool .viewer-stage {
        height: min(64vh, 760px);
    }

    #powerPointViewerTool .slide-canvas {
        width: 860px;
    }
}

@media (max-width: 991.98px) {
    #powerPointViewerTool .viewer-stage {
        padding: 0.6rem;
    }

    #powerPointViewerTool .slide-canvas {
        width: 780px;
        min-height: 440px;
    }
}

@media (max-width: 767.98px) {
    #powerPointViewerTool .slide-canvas {
        width: 700px;
        min-height: 390px;
    }

    #powerPointViewerTool .toolbar-wrap .btn,
    #powerPointViewerTool .toolbar-wrap .small {
        font-size: 0.84rem;
    }
}

@media (max-width: 575.98px) {
    #powerPointViewerTool .slide-canvas {
        width: 620px;
        min-height: 350px;
        padding: 0.75rem;
    }
}