.box{
    background-color: #f0f0f0; /* สีพื้นหลัง */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.container {

    width: 80%;
    height: 50vh;
    padding: 20px;
    border: 10px solid rgba(0, 162, 255, 0.5); /* ขอบสีฟ้าโปร่งใส */
    border-radius: 10px;
    text-align: center;
    position: relative;
    animation: glow 10s infinite alternate;
}
@keyframes glow {
    0% {
        box-shadow: 0 0 10px rgba(0, 162, 255, 0.7);
    }
    100% {
        box-shadow: 0 0 20px rgb(200, 255, 0), 
                    0 0 30px rgba(0, 162, 255, 0.5),
                    0 0 40px rgba(225, 176, 71, 0.3);
    }
}
span {
    display: block;
    margin-top: 10px;
    color: #333; /* สีข้อความ */
}