body {
    display: flex;
    flex-direction: column;
    font-family: Arial, sans-serif;
    background-color: #eceef4;
    color: #000000;
    padding: 20px;
}
h1 {
    /*color: #7289da;*/
    color: #ffff;
    font-size: 50px;
}
main {
    flex: 1;
    padding: 20px;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
/*#toTopBtn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1001;
  border-radius: 10px;
  padding: 10px 15px;
  font-size: 16px;
  cursor: pointer;
  background-color: #7289da;
}*/