*{
    box-sizing: border-box;
    font-family: my-yekan;
}
.main-box{
    border: 2px solid rgba(255, 0, 0, 0.51);
    width: 80%;
    border-radius: 10px;
    margin: 70px auto 0;
}
.main-box .logo{
    text-align: center;
}
.main-box .logo img{
    width: 100px;
    margin-top: 20px;
}