.btn-block {
    display: block;
    width: 100%;
}
.btn-block+.btn-block {
    margin-top: 0.5rem;
}

input[type=button].btn-block,
input[type=reset].btn-block,
input[type=submit].btn-block {
    width: 100%
}
.heimu:hover,.heimu:active {
    color:white;
}
.heimu {
    transition: color 0.15s linear;
    background-color: #000;
    color: #000;
    text-shadow: none;
}