.envelope {
    width: 600px;
    height: 400px;
    background-color: white;
    border: 2px solid #000;
    padding: 20px;
    position: relative;
}

.stamp {
    width: 100px;
    height: 100px;
    border: 2px solid #000;
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 14px;
    background-color: #f8f8f8;
}

.address {

    font-size: 18px;
}

.envelope.address p {
    margin: 5px 0;
}
.a-l-l {
    position: absolute;
    bottom: 40px;
    left: 40px;
    text-align: left;
}

.a-l-r {
    position: absolute;
    bottom: 40px;
    left: 40px;
    text-align: right;
}
.a-c-l {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: left;
}

.a-c {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.a-r-l {
    position: absolute;
    bottom: 40px;
    right: 40px;
    text-align: left;
}

.a-r-r {
    position: absolute;
    bottom: 40px;
    right: 40px;
    text-align: right;
}