body { position: relative; margin: 0; min-height: 90vh; height: 90vh; background-color: #EFEFEF; } .container { display: flex; justify-content: center; align-items: center; height: 100%}#encart{ background-color: #FFF; padding: 2rem; border-radius: 0.5rem; box-shadow: 0px 0px 10px #aaaaaa85;}#encart input{ border-radius: 5px;}#encart button{ border-radius: 5px;}