/*div { border-style: solid; border-width: 1px; }*/
    .buttonn 
    {
        background-color: #4CAF50; /* Green */
        border: none;
        color: black;
        padding: 15px 32px;
        text-align: center;
        text-decoration: none;
        display: inline-block;
        font-size: 16px;
        margin: 4px 2px;
        cursor: pointer;
        border-radius: 8px;
    }
    .button 
    {
        background-color: #4CAF50; /* Green */
        border: none;
        color: white;
        padding: 15px 32px;
        text-align: center;
        text-decoration: none;
        display: inline-block;
        font-size: 16px;
        margin: 4px 2px;
        cursor: pointer;
        border-radius: 8px;
    }
    .button2 {background-color: #008CBA;} /* Blue */
    .button3 {background-color: #f44336;} /* Red */ 
    .button4 {background-color: #e7e7e7; color: black;} /* Gray */ 
    .button5 {background-color: #555555;} /* Black */
    .button1 {background-color: rgba(170, 220, 250, .1);} 
    .button6 {background-color: #FFD662;} /* yellow */
            
    .btn-file {
      position: relative;
      overflow: hidden;
    }
    ::-webkit-file-upload-button 
    {
        background-color: #e7e7e7; color: black;
        color:black;
        padding: 1em;
    }
    #cabecera 
    {
        color:#ff9;
        background-color:#000;
        padding:10px;
        text-align:center;
    }
    #contenedor 
    {
        margin:0 auto;
        width:98%;
        height:80%;
    }
    #contenido 
    {
        background-color:#ddd;
        float:left;
        height:100%;
        padding:10px;
        width:100%;
    }
    #menu 
    {
        background-color:#999;
        float:left;
        height:70%;
        padding:10px;
        width:98.5%;
    }
    #pie 
    { 
        background-color:#bbb;
        clear:both;
        color:#900;
        padding:10px;
        text-align:center;
    }