main {
    display: flex;
    flex-wrap: wrap;
}

.prop {
    width: 15rem;
    border: 1px solid gray;
    border-radius: 0.5vw;
    padding: 0.5vw;
    margin: 0.5vw;
}

.prop > .edit {
    float: right;
}


#prop-form {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
}
#prop-form > fieldset {
    margin: auto;
    background-color: silver;
}