html, body {
    margin: 0;
    background-color: black;
    text-align: center;
}
#pi {
    color: white;
    font-size: 200px;
    word-break: break-all;
    margin: 50px;
}
button {
    background-color: white;
    border: none;
    color: black;
    padding: 8px 16px;
    margin: 10px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    transition-duration: 0.4s;
    cursor: pointer;
    font-weight: bold;
}
button:hover {
    color: white;
}
#playBtn {
    border: 2px solid green;
}
#playBtn:hover {
    background-color: green;
}
#stopBtn {
    border: 2px solid blue;
}
#stopBtn:hover {
    background-color: blue;
}
#resetBtn {
    border: 2px solid red;
}
#resetBtn:hover {
    background-color: red;
}
#help {
    max-width: 320px;
    height: auto;
    margin: 5px;
}
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .4s;
    transition: .4s;
}
.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
}
input:checked + .slider {
    background-color: #2196F3;
}
input:focus + .slider {
    box-shadow: 0 0 1px #2196F3;
}
input:checked + .slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
}
.slider.round {
    border-radius: 34px;
}
.slider.round:before {
    border-radius: 50%;
}
#chkbox {
    color: white;
    font-weight: bold;
}
#count {
    color: white;
    font-size: 20px;
}