body{
    font-family: Arial, sans-serif;
}

table{
    margin:30px auto;
    border-collapse:collapse;
}

th{
    height:55px;
    font-size:22px;
    font-weight:bold;
}

td{
    text-align:center;
    vertical-align:middle;
    padding:10px;
}

/* KHÔNG ép kích thước ảnh */
td img{
    display:block;
    margin:auto;
}
.back{
    text-align:center;
    margin:35px 0;
}

.back a{

    display:inline-block;

    padding:12px 25px;

    background:linear-gradient(135deg,#4CAF50,#2E8B57);

    color:white;

    text-decoration:none;

    border-radius:30px;

    font-size:18px;

    font-weight:bold;

    box-shadow:0 5px 10px rgba(0,0,0,.2);

    transition:.3s;
}

.back a:hover{

    background:linear-gradient(135deg,#2E8B57,#4CAF50);

    transform:translateY(-3px);

    box-shadow:0 8px 18px rgba(0,0,0,.3);
}