.contact-emails {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100vw;
    background: rgba(0,0,0,0.45);
    text-align: center;
    padding: 0.7em 0 0.5em 0;
    font-size: 1.05rem;
    color: #fff;
    text-shadow: 0 1px 6px rgba(0,0,0,0.7);
    opacity: 0.96;
    z-index: 10;
}
.contact-emails a {
    color: #fff;
    text-decoration: underline;
    margin: 0 0.3em;
    transition: color 0.2s;
}
.hero::after {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('andandoSolutionsFondo.png') center center/cover no-repeat;
    opacity: 0;
    transition: opacity 0.7s;
    z-index: 0;
}
.hero.loaded::after {
    opacity: 1;
}
.hero > * {
    position: relative;
    z-index: 1;
}

.hero {
    background: #b0b0b0 url('andandoSolutionsFondo-placeholder.jpg') center center/cover no-repeat;
    min-height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding: 6vh 2rem 0 2rem;
    text-align: center;
    color: #fff;
    text-shadow: 0 2px 12px rgba(0,0,0,0.7), 0 1px 2px rgba(0,0,0,0.5);
    transition: background-image 0.5s;
}

    .hero {
        background: url('andandoSolutionsFondo_calidad.png') center center/cover no-repeat;
    }
.hero.loaded {
    background: #b0b0b0 url('andandoSolutionsFondo.png') center center/cover no-repeat;
}
.hero h1 {
    margin: 0 0 1rem 0;
    font-size: 2.5rem;
}