style.css

p.caption {
  color: #777;
  margin-top: 10px;
}
p code {
  white-space: inherit;
}
pre {
  word-break: normal;
  word-wrap: normal;
}
pre code {
  white-space: inherit;
}

.infobox {
  padding: 1em 1em 1em 7em;
  margin-bottom: 10px;
  /*background: lightgray 5px center/3em no-repeat;*/
  background: #FFD100 5px center/3em no-repeat;
  border: 4px solid #A6192E;
  border-radius: 5px;
}
.caution {
  background-image: url("images/icon-caution.png");
  background-size: 10%;
  background-repeat: no-repeat;
}
.important {
  background-image: url("images/icon-important.png");
  background-size: 10%;
  background-repeat: no-repeat;
}
.note {
  background-image: url("images/icon-note.png");
  background-size: 10%;
  background-repeat: no-repeat;
}
.tip {
  background-image: url("images/icon-tip.png");
  background-size: 10%;
  background-repeat: no-repeat;
}
.warning {
  background-image: url("images/icon-warning.png");
  background-size: 10%;
  background-repeat: no-repeat;
}
.software {
  background-image: url("images/icon-think-software.png");
  background-size: 10%;
  background-repeat: no-repeat;
}
.brainware {
  background-image: url("images/icon-think-brainware.png");
  background-size: 10%;
  background-repeat: no-repeat;
}

/* Added by Antonio, based on Alex Quinto's code*/
/* THIS CODE USED FOR THE BOOK COVERS */
.cover1, .cover2, .cover4, .cover4b {
    width: 400px;
    height: 500px;
    background-color:darkgray;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    margin: auto;
}

.cover1 {
    background-image: url("images/cover-2021/voronoi_ponyo.gif");
}

.cover2 {
    background-image: url("images/cover-2021/voronoi_ponyo.gif");
}

.cover1 img, .cover2 img {
    width: 400px;
}
.cover3 {
 width: 400px;
 height: 300px;
 background-image: url("images/cover-2021/voronoi_ponyo.gif");
 background-position: center;
 background-size: 150%;
 overflow: hidden;
 margin: auto;
}
.header3b {
  width: 400px;
  height: 210px;
  margin: auto;
  background:darksalmon;
}
.header3b img { width: 400px;}

.cover4, .cover4b {
    position: relative;
    overflow: visible;
}
.cover4 img, .cover4b img {
    position: absolute;
    width: 400px;
    height: 500px;
    opacity: 0.4;
    left: 0%;
    top: 0%;
    z-index: 0;
}
.cover4 .subtitle, .cover4b .subtitle {
    font-size: .5em;
    color: white;
    -webkit-text-stroke: 0px;
}

.cover5, .cover5b {
  background: url("https://images.unsplash.com/photo-1465447142348-e9952c393450?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1000&q=80");
}
.cover5, .cover5b, .cover5c {
    width: 400px;
    height: 566px;
    background-position: 0px 50px;
    background-repeat: no-repeat;
    margin: auto;
    animation: animatedBackground 50s linear 0s infinite alternate;
}
.cover5c {
  background: url("images/cover-2021/voronoi_ponyo.gif");
  background-size: 180%;
}

@keyframes animatedBackground {
    from {
      background-position: 0 0;
    }
    to {
      background-position: 100% 0;
    }
  }

.cover5 img, .cover5b img, .cover5c img {
    width: 400px;
}

.fade-in-text {
    width: 400px;
    display: inline-block;
    font-size: 33px;
    font-weight: bold;
    color: black;
    padding: 25px;
    text-align: center;
    text-transform: uppercase;
    animation: fadeIn linear 5s;
    -webkit-animation: fadeIn linear 5s;
    -moz-animation: fadeIn linear 5s;
    -o-animation: fadeIn linear 5s;
    -ms-animation: fadeIn linear 5s;
  }


.cover4 .fade-in-text, .cover4b .fade-in-text {
    position: absolute;
    z-index: 99;
    left: 0;
  }
.cover4b .fade-in-text {
  -webkit-text-stroke: 1px white;
}

.header3 {
    margin: auto;
    width: 400px;
}

.header3 .fade-in-text {
      font-size: 18px;
      background:darksalmon;
}

.bottom, .bottom3 {
    background:white;
    width: 400px;
    margin: auto;
}

.bottom3 p {
    text-align: center;
    margin: 0;
    padding: 1em;
}

  @keyframes fadeIn {
    0% {opacity:0;}
    100% {opacity:1;}
  }

  @-moz-keyframes fadeIn {
    0% {opacity:0;}
    100% {opacity:1;}
  }

  @-webkit-keyframes fadeIn {
    0% {opacity:0;}
    100% {opacity:1;}
  }

  @-o-keyframes fadeIn {
    0% {opacity:0;}
    100% {opacity:1;}
  }

  @-ms-keyframes fadeIn {
    0% {opacity:0;}
    100% {opacity:1;}
  }
/*End of book covers */
/*End of addition by Antonio, based on Alex Quinto's code*/

.level1 h1 {
  border-bottom: 1px solid;
}
h1, h2, h3, h4, h5, h6 {
  font-weight: normal;
}
h1.title {
  font-weight: 700;
}