style.css

/* general stuff */
body {
  background-image: url(https://picsum.photos/1000/600);
  background-size: cover;
  font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
  font-size: 16px;
  font-weight: lighter;
}
h1 {
  color: rgb(40, 40, 60);
  font-size: 32px;
  font-weight: bold;
}
h2 {
  font-size: 25px;
  font-style: italic;
  font-weight: normal;
}
a {
  color: purple;
  text-decoration: none;
}
a:hover {
  color: blueviolet;
}

/* container stuff */
.container {
  width: 700px;
  margin: auto;
}
/* responsivity stuff*/
@media (max-width: 960px) {
  /* For a screen < 960px, this CSS will be read */
  .container {
    width: 700px;
  }
}
@media (max-width: 720px) {
  /* For a screen < 720px, this CSS will be read */
  .container {
    width: 500px;
  }
}
@media (max-width: 540px) {
  /* For a screen < 540px, this CSS will be read */
  .container {
    width: 300px;
  }
}
.opaque {
  opacity: 1;
}
strong {
  font-weight: bold;
}
.card-beige {
  background-color: rgb(245, 245, 220);
  border-radius: 4px;
  box-shadow: 2px 2px rgb(235, 235, 210);
  margin-bottom: 20px;
  padding: 10px;
  opacity: 0.9;
}
.center-text {
  text-align: center;
}
.list-inline > li {
  display: inline-block;
  padding: 0px 20px;
}
.img-circle {
  border-radius: 100%;
}