@import url('https://fonts.googleapis.com/css2?family=Muli&display=swap');

:root{
--line-border-fill: #3498db ;
 --line-border-empty: #e0e0e0;
   
}

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    background-color: #eee;
    font-family: 'Muli', sans-serif;
    display: flex;
    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: white;
   color: #999;
   border-radius: 50px;
   height: 30px;
   width: 30px;
   display: flex;
   align-items: center;
   justify-content: center;
   border: solid 3px #e0e0e0;
   transition:0.4s ease ;
}

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

.btn{
    background-color: var(--line-border-fill);
    color:white ; 
    border: 0 ; 
    border-radius:6px;
    cursor: pointer ;
    font-family: inherit ; 
    padding: 8px 10px ;
    margin: 10px ;
    font-size: 14px ; 
}

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

.btn:focus{
    outline: 0;
}
.btn:disabled{
    background-color: var(--line-border-empty);
    cursor: not-allowed;
}