* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}
body {
  position: relative;
  height: 100vh;
  background: #000;
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "IBM Plex Sans", sans-serif;
}

h1 {
  margin: 0 auto;
  color: #fff;
  display: flex;
  justify-content: center;
  margin-top: 20px;
}
.time {
  display: flex;
  justify-content: center;
  font-size: 30px;
}
.main {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.glow {
  font-size: 60px;
  color: #fff;
  font-weight: bold;
  animation: glow 1s ease-in-out infinite alternate;
  -moz-animation: glow 1s ease-in-out infinite alternate;
  -webkit-animation: glow 1s ease-in-out infinite alternate;
}