ahora me sale esto :
# Error Line 119, Column 9: ID "envoltorio_bloque" already defined.
<div id="envoltorio_bloque">
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An "id" is a unique identifier. Each time this attribute is used in a document it must have a different value. If you are using this attribute as a hook for style sheets it may be more appropriate to use classes (which group elements) than id (which are used to identify exactly one element).
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pero cuando quiero usar Class , no trabaja como un div y los boques se descuadra , pero alli me dice que use class no div