.outer {
    border: 15px solid green;
    display: inline-block;
}

.box {
    width: 250px;
    height: 200px;
    background-color: coral;
}

.inner {
    border: 7.5px solid;
}

.box-outlined {
    border: 7.5px solid;
    outline: 15px solid chocolate;
    cursor: pointer;
}

.box-shadowed {
    box-shadow: 0 0 0 7px black, 0 0 0 15px chocolate;
    cursor: pointer;
}