body {
  margin: 0;
  background: #f8f9fa;
  color: #212529;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

@media (prefers-color-scheme: dark) {
  body {
    margin: 0;
    background: #212529;
    color: #f8f9fa;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
  }
}

.txt_al_cen {
   text-align: center;
}

header {
  padding: 15px;
  background-color: #0067ff;
}

.top {
  display: flex;
}

.cre-o {
  margin-top: .4em;
  margin-bottom: .4em;
  margin-left: 12px;
  font-weight: bold;
}

.box {
  display: flex;
}
.verse {
  width: 22.5em;
  font-size: 1.2em;
  font-weight: bold;
}
.spacer {
  width: 76px;
  height: 20px;
  flex-shrink: 100;
}
.ref {
   text-wrap: nowrap;
   float: right;
   margin-left: 5px;
}

main {
  margin: 10px;
  flex-grow: 1;
}

.workers {
  display: flex;
  justify-content: center;
  max-width: 460px;
  font-size: 7rem;
}

footer {
  background-color: #0067ff;
  display: flex;
  bottom: 0;
  padding: 10px;
  justify-content: space-evenly;
  font-size: 1.3rem;
  font-weight: bold;
}