*{
    margin: 0;
    padding:0;
    box-sizing: border-box;
}
.contenedor{
    padding: 60px 0;
    width: 90%;
    max-width: 1000px;
    margin: auto;
    overflow: hidden;
}
.titulo{
    color: rgb(12, 112, 112);
    font-size: 30px;
    text-align: center;
    align-content: center;
    margin-bottom: 60px;  
}
header{
    width: 100%;
    height: 400px;
    background: #373B44; 
     /* fallback for old browsers */
    background: -webkit-inear-gradient(to right, hsla(217, 89%, 61%, 0.5), hsla(222, 11%, 24%, 0.5)),url(https://mejorconsalud.as.com/wp-content/uploads/2015/10/sistema-respiratorio.jpg);
      /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to right, hsla(217, 89%, 61%, 0.5), hsla(222, 11%, 24%, 0.5)),url(https://mejorconsalud.as.com/wp-content/uploads/2015/10/sistema-respiratorio.jpg);
     /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
     /*background-size: cover;*/
    background-attachment: fixed;
    position: relative;
}
header .textos-header{
    display:flex;
    height: 330px;
    width: 100%;
    align-items: center;
    text-align: center;
    justify-content: center;
    flex-direction: column;
}
.textos-header h1{
    font-size: 70px;
    color: #fff;
}
.textos-header h3{
    font-size: 30px;
    font-weight: 300;
    color: #fff;
}
.wave{
    position: absolute;
    bottom: 0;
    width: 100%;
}
.btn-spotify{
    display: inline-block;
    position: fixed;
    width: 200px;
    height: 55px;
    line-height: 35px;
    right: 80px;
    border-radius: 50px;
    bottom: 60px;
    padding-bottom: 10px;
  }
footer{
    background:  #647ec5;
    padding: 60px 0 30px 0;
    margin: auto;
    overflow: hidden;
}
.contenedor-footer{
    display: flex;
    width: 90%;
    justify-content: space-evenly;
    align-items: center;
    padding-bottom: 50px;
}
  
.content-foo{
    text-align: center;
    display: inline-block;
    font-size: 18px;
    text-align: center;
}
.content-foo h4{
    color: #fff;
    border-bottom: 3px solid #ccc;
    padding-bottom: 5 px;
    margin-bottom: 10px;
}
.content-foo p{
    color: #949494;
}
.titulo-final{
    text-align: center;
    font-size: 24px;
    margin: 20px 0 0 0;
}
@media screen and (max-width:900px){
    header{
      background-position: center;
    }
}