@import url(https://fonts.cdnfonts.com/css/space-age);
#contenido,
#presentacion::before {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%)
}

@font-face {
    font-family: Space;
    src: url('assets/fuentes/space_age.ttf') format('truetype');
    font-weight: 400;
    font-style: normal
}

@font-face {
    font-family: Lato;
    src: url('assets/fuentes/Lato/Lato-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal
}

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

body {
    font-family: Lato, sans-serif;
    background-color: #000;
    color: #fff;
    overflow-x: hidden
}

#presentacion {
    width: 100%;
    height: 100vh;
    background-image: url('assets/imagenes/fondoUniverso.jpg');
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden
}

#presentacion::before {
    content: "";
    width: calc(100% - 40px);
    height: calc(100% - 40px);
    border: 1px solid gold;
    border-radius: 5px;
    z-index: 0
}

#contenido {
    text-align: center;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center
}

#contenido h1 {
    font-family: 'Space Age', sans-serif;
    color: gold;
    font-size: 3em;
    margin-bottom: 10px;
    text-shadow: 0 0 10px gold, 0 0 20px gold
}

#contenido p {
    font-family: Lato, sans-serif;
    color: #fff;
    font-size: 1.2em;
    margin-bottom: 20px;
    text-shadow: 0 0 5px #fff
}

.nave-animada {
    max-width: 30%;
    height: auto;
    margin-bottom: 20px;
    transform: translateX(150%) translateY(-50%) scale(.5);
    opacity: 0;
    animation: 3s ease-in-out forwards naveMovimiento
}

@keyframes naveMovimiento {
    0% {
        transform: translateX(150%) translateY(-50%) scale(.5);
        opacity: 0
    }
    100% {
        transform: translateX(0) translateY(0) scale(1);
        opacity: 1
    }
}

#entrar:enabled {
    background: radial-gradient(circle, rgba(255, 215, 0, .8), rgba(255, 69, 0, .8));
    color: #fff;
    padding: 15px 30px;
    border: none;
    border-radius: 50%;
    font-size: 1.1em;
    cursor: pointer;
    box-shadow: 0 0 20px gold, 0 0 40px orange;
    transition: .3s
}

#entrar:hover {
    transform: scale(1.1);
    box-shadow: 0 0 30px gold, 0 0 60px orange
}

#en-construccion {
    font-family: Lato, sans-serif;
    color: red;
    font-size: 1em;
    margin-top: 10px;
    text-shadow: 0 0 5px red;
    animation: 2s infinite parpadeo
}

@keyframes parpadeo {
    0%,
    100% {
        opacity: 1
    }
    50% {
        opacity: 0
    }
}

@media (max-width:768px) {
    #contenido h1 {
        font-size: 1.8em;
        margin-bottom: 5px
    }
    #contenido p {
        font-size: 1em;
        margin-bottom: 10px
    }
    .nave-animada {
        max-width: 50%
    }
    #entrar {
        padding: 10px 20px;
        font-size: 1em
    }
    #en-construccion {
        font-size: .9em
    }
}