*{
    margin: 0;
    padding: 0;
}

body{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #10101E;
}

.datetime{
    color: #fff;
    background: #10101E;
    font-family: "segoe UI",sans-serif;
    width: 340px;
    padding: 15px 10px;
    border: 3px solid #2E94E3;
    border-radius: 5px;
    -webkit-box-reflect:below 1px linear-gradient(transparent,rgba(255,255,255,0.1)); 
    transition: 0.5s;
    transition-property: background, box-shadow;
}


.date{
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    letter-spacing: 3px;
}

.time{
    font-size: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.time span:not(:last-child){
    position: relative;
    margin: 0 6px;
    font-weight: 600;
    text-align: center;
    letter-spacing: 3px;
}

.time span:last-child{
    background: #2E94E3;
    font-size: 30px;
    font-weight: 600;
    text-transform: uppercase;
    margin-top: 10px;
    padding: 0 5px;
    border-radius: 3px;
}

button {
    margin-top: 20px;
    background: #2E94E3;
    color: #fff;
    border: none;
    border-radius: 3px;
    padding: 8px 15px;
    font-size: 16px;
    cursor: pointer;
    
}
.start_stop{



    text-align: center;
}
button:hover {
    background: #137AC2;
}