body {
    margin: 20px;
}

#editor {
    display: flex;
}
#preview {
    padding:20px;
    border: 0px solid;
}

#setting {
margin: 20px;
}

.banner-position {
    display: flex;
    width: 240px;
    flex-wrap: wrap;
    background-color: #eee;
    border-radius: 8px;
}
.position-item {
    width: 60px;
    height: 40px;
    background-color: #aaa;
    margin: 10px;
    border-radius: 4px;
}
.position-item:hover {
    background-color: pink;
}
input:checked + label {
    background-color: red;
}
.radiobtn {
    display: none;
}