@import url('https://fonts.googleapis.com/css2?family=Dosis&display=swap');

body {

  font-family: 'Dosis',
    sans-serif;
  background-image: url(birthday.jpg);
  background-size: 1550px;
  color: black;
}

    h1 {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }

    .container {
        text-align: center;
        margin-left: auto;
        margin-right: auto;
        font-size:x-large;
    }