.center_screen {
  position: fixed; /* or absolute */
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.center_t {
  text-align: center;
}

.center_i {
  display: block;
  margin: auto;
}

.h1 {
  font-family: monospace;
  font-weight: bold;
  font-size: 5em;
}

.h5 {
  font-family: monospace;
  font-size: 1.25em;
}