input {
    width: 200px;
    padding: 10px, 5px;
}

hr {
    border-color: #7a8288;
}

.topleft {
    position: absolute;
    top: 0px;
    left: 0px;
    margin: 5px
}

.topright {
    position: absolute;
    top: 0px;
    right: 0px;
    margin: 5px;
}

.bodycontent {
    position: absolute;
    top: 100px;
    width: 100%;
}

details[open] summary ~ * {
    animation: sweep .5s ease-in-out;
}

@keyframes sweep {
    0%    {opacity: 0; margin-top: -50px}
    100%  {opacity: 1; margin-top: 0px}
}