body{
    font-family: 'IBM Plex Mono', monospace;
    background: black;
    color: yellowgreen;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0;
}
h1{
    font-size: 4.5rem;
    font-weight: bold;
    margin: 10px;
    margin-top: 20px;
    text-align: center;
}
p{
    font-size: 4rem;
    margin: 25px;
    text-align: center;
}
#curentTime{
    margin-top: 50px;
    color: red;
}
.hidden{
    display: none;
}
.visible{
    display: block;  
}