:root{
    --azul:#121f3d;
    --wood:#524235;
    --white:#ffffff;
    --sm:12px;
}

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

html{
    font-size: 62.5%;
}

body{
    background-image: url('https://images.pexels.com/photos/1303081/pexels-photo-1303081.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1');
    background-repeat:no-repeat;
    background-position: center ;
    background-size: 100%;
    background-color: var(--wood);
    font-family: sans-serif;
    color: var(--white);
    font-size: 1.7rem;
    display: flex;
    text-align: center;
    justify-content: center;
    height: 100vh;
    flex-direction: column;
    
   
}
.container{
    display: flex; 
    justify-content: center;
    margin: 10px;
    }

.container-box{
    display: flex;
    justify-content:center;
    flex-direction: column;
    border: 1px solid var(--white);
    margin: 5px;
    height: 100px;
    width: 100px;
    border-radius: 10px;
}
.container-superior{
    display: flex;
    align-items: center;
    justify-content:center;
    width: 100%;
    height: 90px;
    border-radius: 10px 10px 0px 0px;
    background-color: var(--white);
    font-weight: 700;
    color: var(--azul);
}
.container-number{
    display: flex;
    justify-content:center;
    align-items: center;
    height: 170px;
    font-weight: 700;
    font-size: xx-large;
}
footer{
    position: absolute;
    right: 270px;
    bottom: 10px;
}
footer a{
    text-decoration: none;
    color: var(--white);
    font-size: var(--sm);
}
.back-link{
    position: absolute;
    left: 40px;
    top: 20px;
    text-decoration: none;
    color: var(--white);
    font-weight: bold;
}

.back-link img{
    transform: rotate(180deg);
}