style.css

body {
    background-color: #339966;
}

.container {
    background-color: white;
  width: 840px;
    height: 420px;
    border-radius: 10px;
    margin: 20px auto;
    box-shadow: 5px 5px 5px #888888;
    font-family: 'Inconsolata';
    padding: 20px;
  text-align: center;
    position: relative;
}

.questions {
    display: none;
    text-align: center;
    width: 600px;
}

.left {
    float:left;
}

.final {
    display: none;
}

.btn-circle {
    width: 70px;
    height: 70px;
    font-size: 24px;
    line-height: 1.33;
    border-radius: 35px;
    background: #00d800;
}

.rangeslider__fill {
    background: #00d800;
}

#steth {
    width: 40px;
}

.title {
    text-align: center;
    color: white;
}

.bottom {
    padding: 20px;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
}

.instructions {
    margin-top: 50px;
    margin-bottom: 50px;
}

.center {
    position: relative;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

.final > ul {
  text-align: left;
}