:root {
  color-scheme: dark light;
  --duration: 0.5s;
  --timing: ease;
}
html {
  scroll-behavior: smooth;
  position: relative;
  min-height: 100%;
}
html,
body {
  height: 99%;
}
body img {
  /* opacity: .75; */
  transition: opacity .5s ease-in-out;
}
body img:hover {
  opacity: 1;
}
.content-wrapper {
  padding: 1.5rem;
  text-align: center;
}
.content {
  position: absolute;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}

/* Light mode */
@media (prefers-color-scheme: light) {
  body {
    /* padding-top: 5rem; */
    display: flex;
    align-items: center;
    transition:
      color var(--duration) var(--timing),
      background-color var(--duration) var(--timing);
  }
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  body {
    display: flex;
    align-items: center;
    background-color: #232323;
    transition:
    color var(--duration) var(--timing),
    background-color var(--duration) var(--timing);
  }
  body .jumbotron {
    background-color: #444;
    color: #fff;
  }
  body .separator-bg {
    background-color: #666;
  }
  
  body > .footer {
    background-color: #333;
  }
}

.separator-bg {
  background-color: #ddd;
}

/* -- Button customizations -- */
.btn {
  min-width: 225px;
}