*{
    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://cloudfront-us-east-1.images.arcpublishing.com/metroworldnews/6FJHPNI7YRGQZAR47LXVMTVZAQ.png);
      /* 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://cloudfront-us-east-1.images.arcpublishing.com/metroworldnews/6FJHPNI7YRGQZAR47LXVMTVZAQ.png);
     /* 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;
}
.corazon{
    display: flex;
    justify-content: space-evenly;
    padding-bottom: 10px;
}
.imagen_corazon{
    width: 30%;
    margin-bottom: 30px;
    padding-left: 10px;
    padding-right: 5px;
}
.modulos_cardiovascular{
    display: flex;
    justify-content: space-evenly;
    padding-bottom: 15px;
  }
  .seccion{
    width: 48%;
    height: 400px;
    margin-bottom: 10px;
    margin-right: 10px;
    margin-left: 10px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    box-shadow: 0 0 20px 0 rgba(0, 0,0 , .5);
    padding-right: 15px;
  }
  .seccion > img{ 
    object-fit: cover;
    width: 100%;
    height: 100%;
    display: block;
  }
  .hover-modulos_cardiovascular{
    position: absolute;
    width: 100%;
    height: 100%;
    top:0;
    background: hsla(217, 49%, 35%, 0.5);
    transition: transform .5s;
    display:flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }
  .hover-modulos_cardiovascular img{
    width: 50px;
  }
  .hover-modulos_cardiovascular p{
    color: #fff;
    font-size: 24px;
    border-radius: 50%;
  }
  .seccion:hover .hover-modulos_cardiovascular{
    transform:scale(0);
  }
  
.corazon.contenido-textos{
      width: 48%;
}
.contenido-textos h3{
    margin-bottom: 15px;
    align-items: center;
    justify-content: center;
    text-align: justify;
}
.contenido-textos h3 span{
    background: rgb(12, 112, 112);
    color: #fff;
    border-radius: 50%;
    display:inline-block;
    text-align: center;
    width: 30px;
    height: 30px;
    padding: 2px;
    box-shadow: 0 0 6px rgba(0, 0, 0.5, .5);
    margin-right: 5px;
}
.contenido-textos p{
    padding: 0px 0px 30px 15px;
}
.arduino{
    box-shadow: inset 2000px 2000px 4000px rgba(43, 43, 43, 0.1);  
    background: #647ec5;
    align-items: center;
    justify-content: center;
    display: flexbox;
    margin: auto; 
    padding: 15px 15px 30px 15px;
    width: 800px;
    height: 1800px;
    padding:10px;
    box-sizing: border-box;
     
}
.codigo_arduino{
    padding: 0px 0px 30px 15px;
    align-items: center;
    justify-content: center;
    text-align: justify;
    padding: 0px 0px 30px 20px;
}
.titulo_arduino{
    align-items: center;
    justify-content: center;
    text-align:center;
}
.modulo_1{
    padding-top: 10px;
    background: rgb(255, 255, 255);
  }
  .modulos_cardiovascular{
    display: flex;
    justify-content: space-evenly;
    padding-bottom: 15px;
  }
  .seccion{
    width: 100%;
    height: 100%;
    margin-bottom: 10px;
    margin-right: 10px;
    margin-left: 10px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    box-shadow: 0 0 20px 0 rgba(0, 0,0 , .5);
    padding-right: 15px;
  }
  .seccion h2{
    align-items: center;
    justify-content: center;
    text-align:center;
  }
  .seccion > img{ 
    object-fit: cover;
    width: 100%;
    height: 100%;
    display: block;
  }
  .hover-modulo_1{
    position: absolute;
    width: 100%;
    height: 100%;
    top:0;
    background: hsla(217, 58%, 33%, 0.5);
    transition: transform .5s;
    display:flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }
  .hover-modulo_1 img{
    width: 50px;
  }
  .hover-modulo_1 p{
    color: #fff;
    font-size: 24px;
    border-radius: 50%;
  }
  .seccion:hover .hover-modulo_1{
    transform:scale(0);
  }
  .caso_clinico{
    background-color: #647ec5;
    
    padding: 15px 15px 15px 15px;
    overflow: hidden;
    display: flex;
    justify-content: space-evenly;
  }
  .descripcion_caso{
      margin: 10px 10px 10px 10px;
      padding: 10px 10px 10px 10px;
      overflow: hidden;
      display: flex;
      justify-content: space-evenly;
  }
  .h3{
    box-shadow: inset 10px 10px 10px 10px;
    display: flex;
    justify-content: space-evenly;
  }

  

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;
      width: 100%;
    }
    .corazon{
        flex-direction: column;
        justify-content:center;
        align-items: center;
        margin: auto;
    }
    .corazon.contenido-textos{
        width: 80%;
    }
    .imagen_corazon{
        width: 90%;
    }
    .arduino{
        margin: 0;
        padding:0;
        box-sizing: border-box;
        width: 100%;
    }
    .modulo_1{
      width: 90%;
      display: flex;
      flex-direction:column;
      justify-content: center;
      align-items: center;  
    }
    .modulos_cardiovascular{
      width: 90%; 
      display: flex;
      flex-direction:column;
      justify-content: center;
      align-items: center;  
    }
    .seccion{
      width: 90%;
      display: flex;
      flex-direction:column;
      justify-content: center;
      align-items: center;  
    }
    .seccion_img{
      width: 60%;
      height: 40%;
    }
    
}