@import url('https://fonts.googleapis.com/css?family=Poppins');

body
{
    margin: 0;
    padding: 0;
    font-family: 'Poppins', san-serif;
    background: #0066a8;
}

.center
{
    position: absolute;
    top: 50%;
    width: 100%;
    transform: translateY(-50%);
    text-align:center;
}

h1
{
    text-align:center;
    text-transform: uppercase;
    font-size: 2.5em;
    color: #fff;
}

h1 span
{
   font-size: 3em;
   line-height: .4em;  
}

#clock
{
    display: flex;
    width: 650px;
    margin: 0 auto;   
}

#clock div
{
    position: relative;
    width: 100px;
    padding: 20px;
    margin: 0 5px;
    background: #243842;
    color: #fff;
    border: 2px solid #000;
}

#clock div:last-child
{
    background: #f47a44;
}

#clock div:before
{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: rgba(255,255,255,.2);
}

#clock div span
{
    display: block;
    text-align:center;
}

#clock div span:nth-child(1)
{
    font-size: 48px;
    font-weight: 800;
}

#clock div span:nth-child(2)
{
    font-size: 18px;
    font-weight: 800;
    margin-top: -10px;
}