* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    transition: 0.2s ease;
}

.container {
    display: flex;
    height: 100vh;
    width: 100%;
    justify-content: center;
    align-items: center;
    column-gap: 30px;
    flex-direction: column;
}

.line {
    height: 15px;
    width: 1000px;
    background-color: #c1c1c1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 200px;
    position: relative;
}

.number {
    background-color: white;
    border: 5px solid #c1c1c1;
    border-radius: 100%;
    height: 110px;
    width: 110px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 40px;
    color: #c1c1c1;
    z-index: 1;
}

.buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 85px;
    flex-wrap: wrap-reverse;
    gap: 20px;
}

.btn {
    height: 80px;
    width: 260px;
    font-size: 30px;
    border: 3px solid #009dff;
    background-color: white;
    color: #009dff;
    border-radius: 100px;
    cursor: pointer;
    box-shadow: 0 0 20px #009dff;
}

.btn:hover {
    transform: scale(0.95);
}

.active {
    border-color: #009dff;
    color: #009dff;
    box-shadow: 0 0 15px #009dff;
}

.btn-active {
    box-shadow: 0 0 20px #c1c1c1;
    color: #c1c1c1;
    border-color: #c1c1c1;
    cursor: not-allowed;
}

.line-active {
    background-color: #009dff;
}

.line-color {
    position: absolute;
    width: 0;
    height: 15px;
    background-color: #009dff;
    transition: 0.3s ease;
    border-radius: 200px;
}

@media only screen and (max-width: 1050px) {
    .btn {width: 200px; height: 70px; font-size: 25px;}
    .line {width: 800px; height: 12px;}
    .line-color {height: 12px;}
    .number {height: 100px; width: 100px; font-size: 32px;}
}

@media only screen and (max-width: 850px) {
    .btn {width: 190px; height: 65px; font-size: 25px;}
    .line {width: 600px; height: 10px;}
    .line-color {height: 10px;}
    .number {height: 90px; width: 90px; font-size: 28px;}
}

@media only screen and (max-width: 620px) {
    .btn {width: 170px; height: 60px; font-size: 22px;}
    .line {width: 400px;}
    .number {height: 80px; width: 80px; font-size: 24px;}
}

@media only screen and (max-width: 450px) {
    .line {width: 350px;}
    .number {height: 75px; width: 75px; font-size: 22px;}
}