/* Estilos generales */
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    height: 100vh;
    overflow: hidden;
}

/* Estilos del preloader */
.preloader {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #3498db; /* Fondo del preloader */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    animation: hidePreloader 5s forwards;
}

@keyframes hidePreloader {
    0% {
        opacity: 1;
        visibility: visible;
    }
    100% {
        opacity: 0;
        visibility: hidden;
    }
}

.spinner {
    width: 100px;
    height: 100px;
    border: 10px solid #fff;
    border-top: 10px solid #2980b9;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Animación para el preloader (girar) */
@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Estilos para el contenido de la página */
.content {
    opacity: 0;
    visibility: hidden;
    text-align: center;
    padding: 20px;
    animation: showContent 5.5s forwards;
}

@keyframes showContent {
    0% {
        opacity: 0;
        visibility: hidden;
    }
    100% {
        opacity: 1;
        visibility: visible;
    }
}

/* Encabezado */
header {
    background-color: #2c3e50;
    color: white;
    padding: 20px 0;
}

header h1 {
    margin: 0;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

/* Secciones */
section {
    padding: 20px;
}

section h2 {
    color: #34495e;
}

/* Pie de página */
footer {
    background-color: #2c3e50;
    color: white;
    padding: 10px 0;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
}