@import url('https://fonts.googleapis.com/css2?family=Muli&display=swap');
* {
  box-sizing: border-box;
}
:root{
  --line-border-fill:#3498bd;
  --line-border-empty:#e0e0e0;
}
body {
  font-family: 'Muli',sans-serif;
  display: flex;
  /* flex-direction: column; */
  align-items: center;
  justify-content: center;

  height: 100vh;
  overflow: hidden;
  margin: 0;
}

.container{
  text-align: center;
}

.progress-container{
  display: flex;
  justify-content: space-between;
  position: relative;
  margin-bottom: 30px;
  max-width: 100%;
  width: 350px;
}

.progress-container::before{
  content:'';
  background-color: var(--line-border-empty);
  position:absolute;
  top:50%;
  left:0;
  transform: translateY(-50%);
  height: 4px;
  width: 100%;
  z-index: -1;
}

.progress{
  background-color: var(--line-border-fill);
  position:absolute;
  top:50%;
  left:0;
  transform: translateY(-50%);
  height: 4px;
  width:0%;
  z-index: -1;
  transition: 0.4s ease;
  
}
.circle{
  background-color: #fff;
  color:#999;
  border: 3px solid var(--line-border-empty);
  border-radius: 50%;
  width: 30px;
  height:30px ;
  display:flex;
  align-items: center;
  justify-content: center;
  transition: 0.4s ease;
}

.circle.active{
  border-color:var(--line-border-fill);
}

.btn{
  background-color: var(--line-border-fill);
  color:#fff;
  border:0;
  border-radius:6px;
  cursor:pointer;
  font-family:inherit;
  padding: 8px 30px;
  margin:5px;
  font-size: 14px;
}

.btn:active{
  transform: scale(0.98);
}

.btn:focus{
  outline: 0;
}

.btn:disabled{
  background-color: var(--line-border-empty);

  cursor: not-allowed;
}