fathom/assets/sass/forms.scss

input {
   padding: 4px 6px;
}

label {
   display: block;
   margin-bottom: 2px;
   font-weight: bold;
}

input[type="submit"] {
   background: #533feb;
   color: white;
   padding: 6px 12px;
   border: 0;
   cursor: pointer;

   &:hover,
   &:active {
      background: darken(#533feb, 15%);
   }
}