* {
    font-family: 'PT Serif', serif;
}

.content {
    margin: 20px auto;
    display: block;
    width: 450px;
    text-align: center;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    box-sizing: border-box;
    padding: 10px;
    position: relative;
}

.clock {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 85%;
    margin: auto;
}

span.hr,
span.min,
span.s {
    position: absolute;
    color: #bbb;
    font-family: 'Indie Flower', cursive;
    font-weight: bold;
    font-size: 1.2em;
}

span.hr {
    top: 45%;
    left: 30%;
}

span.min {
    top: 45%;
    left: 60%;
}

span.s {
    top: 45%;
    right: 8%;
}

.content .colon2 {
    font-size: 65px;
    position: absolute;
    right: 32%;
    top: 25px;
}

.content .colon1 {
    font-size: 65px;
    position: absolute;
    left: 34%;
    top: 25px;
}

.content .btn {
    display: block;
    margin: auto;
    margin-top: 50px;
    padding: 10px;
}

.container {
    perspective: 1000px;
    margin: 10px;
    display: inline-block;
}

.container,
.num {
    width: 30px;
    height: 50px;
    border-radius: inherit;
    text-shadow: 1.5px 1.5px 3px #0000006b;
}

.num {
    width: 100%;
    height: 50px;
}

.move {
    border-radius: 3px;
    text-align: center;
    font-size: 80px;
    transform-style: preserve-3d;
}

.anim {
    animation-duration: 0.7s;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

.one {
    /* animation-name: timer; */
    animation-duration: 0.5s;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

#start {
    color: #3b8e52;
}

.f-btn {
    border: 1px solid #bbb;
    cursor: pointer;
    border-radius: 3px;
    padding: 8px 18px;
    margin: 0 5px;
    outline: none;
    text-align: center;
    vertical-align: middle;
    font-size: 1em;
    box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.10);
}

.f-btn:hover {
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.16), 1px 0 5px rgba(0, 0, 0, 0.18);
}

.f-btn:active {
    opacity: 0.9;
    box-shadow: none;
}

@keyframes timer {
    0% {
        transform: rotateY(-90deg);
    }
}