#ex_cabecera{
    display: inline-block;
}

#ex_logo{
    float:left;
    width:150px;
    height:150px;
    border:0.5em solid white;
    border-radius: 50%;
    margin-left:100px;
    background-color:black;
}

#ex_navegador{
float: center;
padding-top: 100px;
padding-left: 1000px;
}

#ex_navegador ul{
   list-style-type: none;
   text-align: center;
}

#ex_navegador li{
   display: inline;
   text-align: center;
   margin:0 50px 0 0;
}

a:link{
    color:red;
    background-color:whitesmoke;
    text-decoration:none;
    padding:5px;
}

a:visited{
    color:white;
    background-color:black;
    text-decoration:none;
}

a:hover{
    color:red;
    background-color:blue;
    text-decoration:underline;
}

a:active{
    color:black;
    background-color:white;
}

#ex_Caja1{
    margin-right: 15%;
    margin-left:50%;
    padding: 2%;
    margin-top: 120px;
    margin-bottom: 100px;
    text-align:justify;
    background-color: rgba(0, 0, 0,0.3);
}

#ex_Caja1 h1{ 
    text-align:justify;
    margin-right: 10%;
    margin-left:30%;
    padding: 2%;
    text-decoration: underline;
}
div{
    display:block;
}

body{
    background-image:url(instrument-3888684_640.png);
    background-repeat:no-repeat;
    background-size: cover;
    font-family:sans-serif;
    background-attachment: fixed;
}

#ex_Caja2{
    margin-right: 10%;
    margin-left:50%;
    padding: 2%;
    margin-top: 10px;
    margin-bottom: 20px;
    text-align:justify;
    background-color: rgba(0, 0, 0,0.3);
}

#ex_Caja2 h2{ 
    text-align:justify;
    margin-right: 10%;
    margin-left:30%;
    padding: 2%;
    text-decoration: underline;
}

#ex_Caja3{
    margin-right: 10%;
    margin-left:50%;
    padding: 2%;
    margin-top: 100px;
    margin-bottom: 20px;
    text-align:justify;
    background-color: rgba(0, 0, 0,0.3);
}

#ex_Caja3 h2{ 
    text-align:justify;
    margin-right: 10%;
    margin-left:30%;
    padding: 2%;
    text-decoration: underline;
}

#ex_servicios{
float: center;
padding-top: 0px;
padding-left: 600px;
}

#ex_servicios ul{
   list-style-type: none;
   text-align: center;
}

#ex_servicios li{
   display:inline-block;
   text-align: center;
   margin:0 50px 0 0;
}

#ex_servicios a:link{
    background-color:transparent;
}

#ex_Cajas{
    margin-right: 20%;
    margin-left:50%;
    margin-top:20px;
    margin-bottom: 20px;
    text-align:justify;
    padding:2%
}

#ex_Cajas img{
    width:250px;
    height:150px;
    border:0.5em solid white;
    border-radius: 10%;
    margin-left:10px;
}

h1{
    text-align:justify;
    margin-right: 10%;
    margin-left:60%;
    padding: 2%;
    text-decoration: underline;
}

h2{
    text-align:justify;
    margin-right: 10%;
    margin-left:60%;
    padding: 2%;
    text-decoration: underline;
}

#ex_Caja4{
    margin-right: 10%;
    margin-left:40%;
    margin-top: 40px;
    margin-bottom: 140px;
    text-align:center;
}

#ex_Caja4 a:link{
    background-color:transparent;
}

#ex_Caja4 img{
    width:250px;
    height:150px;
    border:0.5em solid white;
    border-radius: 10%;
    margin-left:10px;
}

#ex_Caja4 h2{
     text-align:center;
    margin-right: 20%;
    margin-left:20%;
    padding: 2%;
    text-decoration: underline;
}

#ex_Pie{
    text-align: justify;
    height:80px;
    background-color: rgba(0, 0, 0,0.3);
    padding:2%;
}

#ex_Pie ul{
    list-style-type: none;
    text-align: center;
}

#ex_Pie li{
    display: inline;
    text-align: justify;
     margin:0 100px 0 0;
}

#ex_Pie a:link{
    background-color:transparent;
}


#ex_Pie img{
    width:50px;
    height:50px;
    border:0.2em solid white;
    border-radius: 50%;
}

#ex_PieServicios{
    margin-top:20%;
    height:80px;
    text-align: justify;
    background-color: rgba(0, 0, 0,0.3);
    padding:2%;
}

#ex_PieServicios ul{
    list-style-type: none;
    text-align: center;
}

#ex_PieServicios li{
    display: inline;
    text-align: justify;
     margin:0 100px 0 0;
}

#ex_PieServicios a:link{
    background-color:transparent;
}

#ex_PieServicios img{
    width:50px;
    height:50px;
    border:0.2em solid white;
    border-radius: 50%;
}

#ex_videos{
    margin-bottom:80px;
    margin-left:45%;
}