estilos.css

.btn-secondary,
.btn-secondary:hover,
.btn-secondary:focus {
  color: #333;
  text-shadow: none;
}

body {
  text-shadow: 0 .05rem .1rem rgba(0, 0, 0, .5);
  box-shadow: inset 0 0 5rem rgba(0, 0, 0, .5);
  background-color: #e9e9e9;
}

@media (max-width: 768px) {
    .texto-central {
        font-size: 1.2rem;
    }
}

.cover-container {
  max-width: 42em;
}


.todo {
    margin: 0!important;
    width: 100% !important;
    height: 100vh !important;
    display: block !important;
    background-image: url("img/Captura.PNG");
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    overflow: hidden;
}

.arthur-logo {
    position:relative;
    width: 40%;
    animation: movimiento-logo 2s infinite;
}

@keyframes movimiento-logo {
    0% { top: -5px }
    50% { top: 5px }
    100% { top: -5px }
}

.name-brand {
    text-shadow: 2px 2px 2px black;
}

.texto-central {
    font-weight: bold;
    text-shadow: 2px 2px 2px black;
}

.pie {
    opacity: 0.8;
}

.heros {
    text-shadow: none;
}

.alejandro-link:hover, .alejandro-link:active {
    color:#40464b!important;
}