body {
  background-image: url(images/istockphoto-2199561148-1024x1024.jpg);
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.calender-countdown{
    text-align: center;
    border: 1px solid #818a00;
    border-radius: 10px;
    background-color: #f0b434;
    padding: 20px;
    width: 300px;
}

h1 {
    margin-bottom: 20px;
}

#countdown {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.timebox {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.timebox span {
    font-size: 2em;
    font-weight: bold;
}

.timebox p {
    margin: 5px 0 0 0;
}