style.css

body,
html {
  /*cover the whole lenght of the browser */
  width: 100%;
  height: 100%;
  /* use font Mondserrate of use sans-serif*/
  font-family: 'Montserrat', sans-serif;
  /*make image cover the whole page in background and stay centered*/
  background: url(header.jpg) no-repeat center center fixed;
  background-size: cover;
}

/*mae a horizontal line above the button use the HR tag *horizontal tag*/
hr {
    margin: 20px auto;
    color: #F05F44;
    border: 3px solid #F05F44;
    max-width: 65px;
    opacity: 1;  
    border-color: #F05F44;
}

.btn{
  font-weight: 700;
  /*make button round at the edges*/
  border-radius: 300px;
  border-color: #F05F44 ;
}
.btn-primary{
  background-color: #F05F44;
}
.btn-primary:hover{
  border-width: 10px;
}

.btn-sk{
  padding:  1rem 2rem;
}

.buffer-sk {
height: 15rem;
}