*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body{font-family: Arial, Helvetica, sans-serif;}
/*---HEADER INICIO----*/
header {
    background: #2C3E50;
    height: 70px;
    width: 100%;
}
.marca{
    position: relative;
    text-align: center;
    top: 22px;
}
.marca a{
    color: #1ABC9C;
    font-weight: bold;
    font-size: 20px;
    text-decoration: none;
}
/*---HEADER TERMINA----*/
.nota{
    /*background: rgba(184, 184, 184, 0.4);*/
    box-sizing: border-box;
    border-radius: 5px;
    border: 1px solid #969696;
    box-shadow: inset 0 0 1px #272727;
    /*color: rgb(221, 221, 221);*/
    padding: 10px 5px;
    margin: auto;
    margin-top: 30px;
    margin-bottom: 30px;
    max-width: 750px;
    width: 100%;
}
.nota p{margin-bottom: 20px;}

/*Footer*/
footer{
    color: #fff;
    /*background-color: #202b38;*/
    background: linear-gradient(124deg, rgba(43, 44, 64) 0%, rgb(34, 44, 64) 7%);
    width: 100%;
    clear: both;
}

.footer-todo:after{
    background: rgba(173, 173, 173, 0.63);
    content: '';
    display: block;
    position: relative;
    margin: 60px auto -20px;
    /*top: 60px;
    margin-bottom: 60px;*/
    height: 0.5px;
    width: 70%;
}

.footer-todo{
    width: 100%;
    max-width: 1100px;
    margin: auto;
    padding: 20px 0;
}

.contacto{
    display: flex;
    justify-content: space-between;
}

.underline{
    background: #353b48;
    border: 1px solid rgba(0, 0, 0, 0.3);
    border-radius: 3px;
    box-shadow: 0 0 10px #2187e7b3;
    position: relative;
    overflow: hidden;
    margin-bottom: 30px;
    top: 5px;
    left: 0;
    height: 5px;
    width: 100%;
}

.underline span{
    animation: moving 2s linear infinite;
    background: #2187e7;
    border-radius: 3px;
    position: absolute;
    top: 0;
    left: 10px;
    height: 100%;
    width: 15px;
}

@keyframes moving{
    0%{
          left: -20px;
    }
    100%{
          left: 100%;
    }
}

/*.columna2{max-width: 400px;}*/
.columna2 h3{
    font-size: 22px;
    margin-bottom: 20px;
}

.columna2 ul{
    list-style: none;
    box-sizing: border-box;
}

.columna2 li{display: inline-flex;}

.columna2 ul li a{
    animation: animacion 2s linear infinite;
    background: #283d58;
    box-sizing: border-box;
    border-radius: 50%;
    display: inline-flex;
    padding: 15px;
    margin: 0 4px;
    position: relative;
}

.columna3 h3{
    font-size: 22px; 
    /*margin-bottom: 10px;*/
    text-align: left;
}

/*.columna3{width: 300px;}*/
.columna3 ul li{
    list-style: none; 
    padding-bottom: 30px;
} 

.columna3 ul li a{
    /*color: #22c796;*/
    color: #22c796;
    text-decoration: none;
    position: absolute;
    /*font-size: 12px;*/
}

.columna3 a:hover{color: #a8a7a4}

.contenedor-fuder{
    /*background: #202b38;*/
    background: linear-gradient(124deg, rgba(43, 44, 64) 0%, rgb(34, 44, 64) 7%);
    padding: 40px;
}

.footer{
      /*justify-content: space-between;*/
      justify-content: center;
      text-align: center;
      align-items: center;
      display: flex;
      margin-bottom: 20px;
}

.copyright{
    color: #22c796;
    margin-right: 45px;
}

.information a{
    color: #22c796;
    text-decoration: none;
    margin-right: 15px;
}

.information a:hover{color: #a8a7a4;}
/*Termina footer*/

@media (max-width: 400px){
    form{width: 92%}
    .nota{width: 92%; font-size: 15px;}
}

@media screen  and (max-width: 640px){
    .contacto{flex-wrap: wrap;}

    .columna2{
        height: 20vh;
        width: 100%;
    }

    .columna2, .columna3{margin-top: 40px;}
    .contenedor-fuder{padding: 20px;}
    .footer-todo{padding: 20px;}
    .copyright{margin-right: 30px;}

    .information a{
          display: block;
          position: relative;
          margin-bottom: 5px;
          width: 150px;
    }
    .footer-todo:after{margin-bottom: 10px;}
}
@keyframes animacion{
    0%{box-shadow: 0 0 0 0 rgba(46, 85, 136, .6), 0 0 0 0 rgba(46, 85, 136, .6);}
    30%{box-shadow: 0 0 0 15px rgba(46, 85, 136, 0), 0 0 0 0 rgba(46, 85, 136, .6);}
    65%{box-shadow: 0 0 0 15px rgba(46, 85, 136, 0), 0 0 0 10px rgba(46, 85, 136, 0);}
    100%{box-shadow: 0 0 0 0 rgba(46, 85, 136, 0), 0 0 0 10px rgba(46, 85, 136, 0);}
}