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In this specification, the expression collapsing margins means that adjoining margins (no non-empty content, padding or border areas or clearance separate them) of two or more boxes (which may be next to one another or nested) combine to form a single margin.
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scrollbar-face-color: #000000;
scrollbar-shadow-color: #FFC300;
scrollbar-highlight-color: #000000;
scrollbar-3dlight-color: #FFC300;
scrollbar-darkshadow-color: #000000;
scrollbar-track-color: #000000;
scrollbar-arrow-color: #FFC300;
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