body {
    background-color: var(--background-color-light);
    color: var(--text-color-light);
}

.title1 {
    margin-top: 1rem;
    margin-left: 30rem;
}

.in {
    margin-top: 1rem;
    margin-left: 31rem;
    width: 500px;
    height: 25px;
}

.caja {
    position: static;
    background-size: cover;
    background-position: center;
    margin-top: 1rem;
    margin-left: 25rem;
    margin-right: 24.5rem;
    width: 728px; 
    height: 486px;
}

.texto1 {
    margin-top: 0;
    margin-left: 30rem;
}

.texto2 {
    margin-top: 0;
    margin-left: 33rem;
}

.boton1 {
    margin-left: 45rem;
    background-color: #ffffff00;
}

:root {
    --background-color-light: #ffffff;
    --text-color-light: #000000;
    --background-color-dark: #121212;
    --text-color-dark: #ffffff;
}

.dark-mode {
    background-color: var(--background-color-dark);
    color: var(--text-color-dark);
}

/* Firma */

.container-boton {
    background-color: #ffffff;
    border: 1px solid #272727;
    position: fixed;
    z-index: 1;
    border-radius: 50%;
    bottom: 20px;
    right: 25px;
    padding: 15px;
    transition: ease 0.3s;
    animation: efecto 1.2s infinite;
}

.container-boton:hover {
    transform: scale(1.1);
    transition: 0.3s;
}

.boton {
    width: 80px;
    transition: ease 1s;
}

@keyframes efecto {
    0% {
        box-shadow: 0 0 0 0 rgba(147, 181, 255, 0.85);
    }
    100% {
        box-shadow: 0 0 0 25px rgba(0, 0, 0, 0);
    }
}