* {
    box-sizing: border-box;
}

body {
    background-color: rgb(105, 179, 179);
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    min-height: 100vh;
}

#knopka {
    width: 70px;
}

.container, .container2 {
    background-color: #2c3e50;
    height: 200px;
    width: 70px;
    border-radius: 50px;
    display: flex;
    justify-content: space-between;
    align-items:center;
    padding: 15px 0;
    flex-direction: column;
    margin: 20px 0;
}

.container2 {
    height: 140px;
}

.circleRed {
    background-color: rgb(0, 0, 0, 0.3);
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.circleRed.active {
    background-color: red;
    box-shadow: 0 0 25px red;
}

.circleYellow{
    background-color: rgb(0, 0, 0, 0.3);
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.circleYellow.active {
    background-color: yellow;
    box-shadow: 0 0 25px yellow;
}

.circleGreen {
    background-color: rgb(0, 0, 0, 0.3);
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.circleGreen.active {
    background-color: green;
    box-shadow: 0 0 25px green;
}