body { padding: 0; margin: 0; box-sixing: border-box; background-color: #0A0A0A; } .wrapper { display: flex; justify-content: center; align-items: center; height: 200px; width: 100%; height: 100vh; color: #fff; text-align: center; font-size: 1.2rem; } button { border-radius: 50px; padding: 15px; background-color: rgba(0,136,169,1); border: none; cursor: pointer; font-size: 1.1rem; }