master.css

*{
    box-sizing: border-box;
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
}

h4{
    margin: 0 auto;
    margin-bottom: 10%;
    text-align: center;
}

h1{
    margin-bottom: 5%;
    font-weight: 400;
    text-align: center;
}

img{
    display: block;
    margin: 2% auto;
}

button{
    margin: 0 auto;
    width: 48%;
    margin-bottom: 5%;
}


#container {
    width: 80vmin ;
    margin: 0 auto;
    padding: 2% 5%;
    border: solid 2px gray;
    border-radius: 3px;
}

#brand-logo{
    border-bottom: 2px solid gray;
    margin: 3% 10%;
}

input[type=text], input[type=email]{
    border: 0;
    outline: 0;
    width: 100%;
    font-size: .9em;
}

input[type=password]{
    border: 0;
    outline: 0;
    width: 80%;
    font-size: .9em;
}

input{
    border: 0;
    outline: 0;
    width: 100%;
    font-size: .9em;
}

#show-pass-button{
    width: 10%;
    margin: 0 auto;
}

.input-field{
    width: 100%;
    margin-bottom: 3%;
    padding: 5px 10px;
    border: solid 2px #c7c7c7;
    border-radius: 3px;
}

button[type=submit]{
    width: 100%;
    line-height: 2em;
}

p{
    margin-bottom: 5%;
    font-size: small;
    text-align: center;
}

.or {
    display:flex;
    justify-content:center;
    align-items: center;
    color:grey;
    margin-bottom: 5%;
}
  
.or:after{
    content: "";
    display: block;
    background: grey;
    width: 100%;
    height:1px;
    margin-left: 10px;
}

.or:before {
    content: "";
    display: block;
    background: grey;
    width: 100%;
    height:1px;
    margin-right: 10px;
}


.facebook-button{
    width: 100%;
    margin: 0;
    margin-bottom: 2%;
    padding: 2% 30%;
}

.google-button{
    width: 100%;
    margin: 0;
    padding: 2% 30%;
}