.container { position: relative; display: flex; justify-content: center; align-items: center; } .button { position: relative; z-index: 99; /* Make sure the button is above the replica */ font-family: "Poppins", sans-serif; font-weight: 500; font-style: normal; font-size: 70%; /* Adjusted for better readability */ padding: 12px 24px; /* Added padding for a better look */ border-radius: 50px; background-color: rgba(88, 55, 50, 1); color: white; border: none; margin: 0 auto; cursor: pointer; display: block; /* Centering the button */ text-align: center; } .replica { height: 40px; width: 140px; border-radius: 30px; position: absolute; background-color: rgb(146, 146, 146); /* Semi-transparent blue */ border: none; transition: all 0.5s ease-in-out; top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 98; /* Behind the button */ } .replica.active { width: 200vw; /* Full screen */ height: 200vh; /* Full screen */ position: absolute; overflow-y: hidden; top: 30%; z-index: 200; border-radius: 0px; }