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

body {
    font-family: 'Roboto', 'Sans serif';
}

.contenedor {
    width: 95%;
    max-width: 1900px;
    margin: auto;
}

.bg_animate {
    width: 100%;
    height: 100vh;
    background: linear-gradient(70deg, rgba(23, 23, 23, 1) 50%, rgba(0, 255, 255, 0.13) 70%);
    background-color: #171717;
    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: 20px 0;
}

.header_nav h1 {
    color: #fff;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

.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 {
    display: inline-block;
    margin: 0 0.5rem;
    animation: backInLeft;
    animation-duration: 3s;
    /* don't forget to set a duration! */
    color: rgb(247, 247, 247);
    font-size: 60px;
    font-weight: 700;
    margin-bottom: 30px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;

}

.banner_title .invite {
    font-weight: 500;
    display: inline-block;
    margin: 0 0.5rem;
    animation: backInLeft;
    animation-duration: 3s;
    /* don't forget to set a duration! */
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    border: 2 px solid #6bbddb;
    border-top-color: rgb(107, 189, 219);
    border-top-style: solid;
    border-top-width: 2 px;
    border-right-color: rgb(107, 189, 219);
    border-right-style: solid;
    border-right-width: 2 px;
    border-bottom-color: rgb(107, 189, 219);
    border-bottom-style: solid;
    border-bottom-width: 2 px;
    border-left-color: rgb(107, 189, 219);
    border-left-style: solid;
    border-left-width: 2 px;
    border-image-source: initial;
    border-image-slice: initial;
    border-image-width: initial;
    border-image-outset: initial;
    border-image-repeat: initial;
    border-radius: 7px;
    color: #fff;
    font-size: 30px;
    text-decoration: none;
    transition: 0.2s;
    display: inline-block;
    background: rgba(0, 0, 0, 0);
    padding: 5px;
}

.banner_title .invite:hover {
    background: #6bbddb;
    box-shadow: 0 0 5px #6bbddb, 0 0 0px #6bbddb, 0 0 0px #6bbddb;
}

.contenedor::selection {
    background: #6bbddb;
}

h1 {
    position: fixed;
    left: 5;
    top: 20px;
}

h1::selection {
    background: #6bbddb;
}

h1 span::selection {
    background: #6bbddb;
}

h1 span {
    color: aqua;
}

h2::selection {
    background: #6bbddb;
}

.invite::selection {
    background: #6bbddb;
}

.banner_img {
    animation: movimiento 2.5s linear infinite;
}

.banner_img img {
    display: inline-block;
    margin: 0 0.5rem;
    animation: rotateIn;
    animation-duration: 3s;
    /* don't forget to set a duration! */
    width: 600px;
    display: block;
}

/* burbujas */

.burbuja {

    border-radius: 50%;
    background: rgba(207, 201, 223, 0.13);
    opacity: 0;

    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;
}

.footer {
    font-size: 20px;
    width: 100%;
    height: 150px;
    background: linear-gradient(70deg, rgba(23, 23, 23, 1) 61%, rgba(0, 255, 255, 0.13) 83%);
    background-color: #171717;
    color: #fff;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.footer h2 {
    color: #fff;
    font-size: 20px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.sotial-network {
    display: flex;
    justify-content: space-evenly;
    width: 100px;
    margin-top: 8px;
}

@keyframes burbujas {
    0% {
        bottom: 0;
        opacity: 0;
    }

    30% {
        transform: translateX(30px);
    }

    50% {
        opacity: .2;
    }

    100% {
        bottom: 100vh;
        opacity: 0;
    }
}

@keyframes movimiento {
    0% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(30px);
    }

    100% {
        transform: translateY(0);
    }
}