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

*{
    box-sizing: border-box;
}

body{
    background-color: #f6f7fb;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, 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:#fff;
color:#999;
border-radius: 50%; 
height: 30px; 
width: 30px; 
display: flex;
align-items: center;
justify-content:center;
border: 3px solid var(--line--border-empty);
transition: .4s ;
}
.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;
}