*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    }
    
    body{
    font-family: 'Roboto', 'Sans serif';
    }
    
    .contenedor{
    width: 90%;
    max-width: 1200px;
    margin: auto;
    }
    
    .bg_animate{
    width: 100%;
    height: 100vh;
    background: linear-gradient(to right, #005C98);
    position: relative;
    overflow: hidden;
    }
    
    .header_nav{
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    }
    
    .header_nav .contenedor{
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    }
    
    .header_nav h1{
    color: #fff;
    font-family: 'Gagalin';
    }
    
    .header_nav nav a{
    color: #fff;
    text-decoration: none;
    margin-right: 10px;
    }
    
    .banner{
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    }
    
    .banner_title h2{
    color: #fff;
    font-size: 50px;
    font-weight: 800;
    margin-bottom: 20px;
    opacity: .50;
    position: absolute;
    
    width: 100px;
    height: 80px;
    animation: movimiento 3s linear infinite;
    
    }
    
    
    .banner_img{
    animation: movimiento 3s linear infinite;
    }
    
    .banner_img img{
    width: 800px;
    display: block;
    
    }
    
    /* burbujas */
    
    .burbuja{
    border-radius: 50%;
    background: #fff;
    opacity: .3;
    
    position: absolute;
    bottom: -150;
    
    animation: burbujas 3s linear infinite ;
    }
    
    .burbuja:nth-child(1){
    width: 80px;
    height: 80px;
    left: 5%;
    animation-duration: 3s;
    animation-delay: 3s;
    }
    
    .burbuja:nth-child(2){
    width: 100px;
    height: 100px;
    left: 35%;
    animation-duration: 3s;
    animation-delay: 5s;
    }
    
    .burbuja:nth-child(3){
    width: 20px;
    height: 20px;
    left: 15%;
    animation-duration: 1.5s;
    animation-delay: 7s;
    }
    
    .burbuja:nth-child(4){
    width: 50px;
    height: 50px;
    left: 90%;
    animation-duration: 6s;
    animation-delay: 3s;
    }
    
    .burbuja:nth-child(5){
    width: 70px;
    height: 70px;
    left: 65%;
    animation-duration: 3s;
    animation-delay: 1s;
    }
    
    .burbuja:nth-child(6){
    width: 20px;
    height: 20px;
    left: 50%;
    animation-duration: 4s;
    animation-delay: 5s;
    }
    
    .burbuja:nth-child(7){
    width: 20px;
    height: 20px;
    left: 50%;
    animation-duration: 4s;
    animation-delay: 5s;
    }
    
    .burbuja:nth-child(8){
    width: 100;
    height: 100px;
    left: 52%;
    animation-duration: 5s;
    animation-delay: 5s;
    }
    
    .burbuja:nth-child(9){
    width: 65px;
    height: 65px;
    left: 51%;
    animation-duration: 3s;
    animation-delay: 2s;
    }
    
    .burbuja:nth-child(10){
    width: 40px;
    height: 40px;
    left: 35%;
    animation-duration: 3s;
    animation-delay: 4s;
    }
    
    
    @keyframes burbujas{
    0%{
        bottom: 0;
        opacity: 0;
    }
    30%{
        transform: translateX(30px);
    }
    50%{
        opacity: .4;
    }
    100%{
        bottom: 100vh;
        opacity: 0;
    }
    }
    
    @keyframes movimiento{
    0%{
        transform: translateY(0);
    }
    50%{
        transform: translateY(30px);
    }
    100%{
        transform: translateY(0);
    }
    }