body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: url(./image/tech.jpeg)center/cover no-repeat;
    color: white;
    font-family: Arial, Helvetica, sans-serif;
}
.counter-box {
    flex: 0 0 70%;
    text-align: center;
    font-weight: 700;
    padding: 1rem;
    margin: .25rem .5rem;
    border: 2px solid silver;
    border-radius: 8px;
    box-shadow: 5px 5px 10px 10px black;
}
.counter {
    font-size: 6rem;
}
.btn {
    background: white;
    border: 2px solid #fa6fff;
    border-radius: 8px;
    margin: .25rem .5rem;
    font-size: 1.8rem;
    padding: .25rem .5rem;
    box-shadow: 0px 3px 3px 3px black;
    outline: none;
}
.btn:hover {
    background: rgb(2, 151, 2);
    color: white;
}
.btn:active {
    box-shadow: none;
}