style.css

@import url('https://fonts.googleapis.com/css2?family=Montagu+Slab:opsz,wght@16..144,200;16..144,400;16..144,600&family=Calistoga&display=swap');
@import url('https://use.fontawesome.com/releases/v6.1.2/css/all.css');

body {
  background: white;
  background-image: linear-gradient(to right, #5910ec, rgb(40, 4, 79));
  background-attachment: fixed;
  color:rgb(185, 159, 209);
  font-size: 16px;
  line-height:24px;
  font-family: 'Montagu Slab';
  text-align: center;
}

h1 {
  font-size: 24px;
  color:rgb(255, 255, 255);
}

h2 {
  font-size: 20px;
  color:rgb(210, 183, 234);
}

a {
  color:#331f41;
  text-decoration: none;
  transition-property: color;
  transition-duration: 0.2s;
}

a:hover {
  color:#cde1d3
}

.img-circle {
  width: 100px;
  border-radius: 50%;
  box-shadow: 0 0px 30px rgba(255, 255, 255, 0.2);
  margin: 16px auto;
}

.container {
  width: 70%;
  margin: 0 auto;
}

.card {
  background: rgba(255, 255, 255, 0.2);
  padding: 24px;
  border-radius: 4px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  margin: 24px;
}

.card:hover {
  background: rgba(255, 255, 255, 0.4);
}

.btn-rectangle {
  background: rgba(255, 255, 255, 0.5);
  padding: 8px;
  width: 120px;
  margin: 24px auto 16px;
  border-radius: 8px;
  transition-property: width;
  transition-duration: 0.2s;
}

/* .btn-rectangle:hover {
  width: 50%;
} */

.list-inline > li {
  display: inline-block;
  padding: 0px 20px;
  font-size: 32px;
  transition-property: width;
}

.list-inline {
  list-style: none;
  padding-left: 0px;
}

@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;
  }
  .btn-rectangle {
    width: 50px;
  }
}