.b1 {
  background-color: rgb(5, 255, 255);
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-weight: bold;
  margin-right: 10px;
}

.b2 {
  background-color: rgb(99, 40, 40);
  color: aliceblue;
  border: 2px solid black; /* solid, dotted, can be use */
  border-radius: 10px;
  padding: 15px 20px;
  text-transform: uppercase; /* all text will be upperscale*/
  margin-right: 10px; /* Add space between two buttons.*/
}

.b3 {
  background-color: aqua;
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-weight: bold;
}

.carth1 {
  color: rgb(59, 52, 47);
  text-align: center;
}

.container {
  display: flex;
  justify-content: center;
  padding-top: 100px;
}

body {
  background-image: url("image.jpg");
  background-size: cover;
}