body {
    background: #111; 
    color: #e6e6e6;
    font-family: "Georgia", serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.contenedor {
    width: 60%;
    padding: 30px;
    border: 1px solid #666;
    background: #181818;
    box-shadow: 0 0 15px #000;
}

h1 {
    text-align: center;
    font-size: 2em;
    margin-top: 0;
}

.texto {
    font-size: 20px;
    line-height: 1.5;
    text-align: justify;
}

nav {
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
}

a {
    color: #9f7fff;
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    text-decoration: underline;
}
/* === Fondo global para todas las páginas === */
html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
    background-image: url('custom_bg.png'); /* <-- fondo */
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* === Estrellas === */
.star {
    position: absolute;
    background-image: url('star.png'); /* <-- imagen de estrella */
    background-size: contain;
    background-repeat: no-repeat;
    pointer-events: none;
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.8));
    animation: fall linear infinite;
}

@keyframes fall {
    0% { transform: translateY(-50px) rotate(0deg); opacity: 0; }
    5% { opacity: 1; }
    95% { opacity: 1; }
    100% { transform: translateY(calc(100vh + 50px)) rotate(360deg); opacity: 0; }
}

/* Tamaños */
.star.tiny { filter: drop-shadow(0 0 2px rgba(255, 255, 255, 0.4)); }
.star.small { filter: drop-shadow(0 0 3px rgba(255, 255, 255, 0.5)); }
.star.medium { filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.6)); }