* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}
 
html {
    place-items: center;
}
 
body {
    font-family: monospace;
    font-size: 2rem;
    min-height: 100vh;
    display: grid;
    overflow-y: hidden;
    place-items: center;
    background: linear-gradient(-45deg, #c4d2ef, #dfe6f6);
}
 
.hr,
.min,
.sec {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-gap: 3rem;
    grid-row: 1/2;
    align-items: start;
}
 
.number {
    padding: 0.5em;
    width: 4rem;
    height: 4rem;
    display: grid;
    place-items: center;
    color: #f9fbfd;
    transition: all 500ms 100ms ease;
    border-radius: 50%;
}
 
.number.pop {
    color: #3e6ccb;
    font-weight: bold;
    transform: scale(1.3);
    background-color: #dfe6f6;
    box-shadow: -10px -10px 20px -5px #f9fbfd, 10px 10px 20px #a9bee8;
}
 
.strip {
    transition: transform 500ms ease-in-out;
    border-radius: 8px;
    background-color: #dfe6f6;
    box-shadow: -10px -10px 20px -5px #f9fbfd, 10px 10px 20px #a9bee8;
}
 
.clock {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 5rem;
    height: 4rem;
    position: relative;
    padding: 0 4rem;
}