index.css

body{
    padding: 0px;
    margin: 0px;
    background-color: #434c65;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
}
.text
{
    color: white;
    font-weight: 400;
}
#descripcion
{
    width: 700px;
    text-align: center;
    margin-bottom: 40px;
}
.flex{
    display: flex;    
}

.row{
    flex-direction: row;
}

.column{
    flex-direction: column;
}

.centerJustify{
    justify-content: center;
}

.centerAligitems{
    align-items: center;
}

#forms input{
    width: 500px;
    height: 30px;
    outline: none;
    border-radius: 3px;
    border-color: #434c65;
    border: 0px;
    margin-right: 7px;
}

#forms button{
    margin-left: 7px;
    outline: none;
    border: 0px;
    background-color: #f89344;
    color: white;
    border-radius: 4px;
}

#forms button:focus{
    margin-left: 7px;
    outline: none;
    border: 0px;
}

#forms button:hover{
    margin-left: 7px;
    outline: none;
    border: 0px;
    cursor: pointer;
}
#grado p{
    font-size: 90px;
    color: white;
}

#spinner{
    background: rgb(29, 29, 29);
    width: 100%;
    height: 100%;
    position: fixed;
    z-index: 1;    
    opacity: 0.5;
    display: flex;
    justify-content: center;
    align-items: center;
}

#spinner .animacionSpinner
{
    width: 200px;
    height: 200px; 
    border-radius: 50% 50%;
    border: 8px;
    border-color: #f89344; 
    border-style: dotted;
    position: relative;
    opacity: 1;
    z-index: 4; 
    animation: animacion;
    animation-iteration-count: infinite;
    animation-duration: 2s;
    animation-delay: unset;
    
}

@keyframes animacion {
    0%{
        transform: rotateX(180deg)  rotateY(180deg) scale(1);
    }

    100%{
        transform: rotateX(-180deg)  rotateY(-180deg) scale(0.5);
    }
    
    
}