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

body {
    background-color: rgb(6, 6, 88);
    margin: 20px;
}

.container-fluid {
    width: 100%;
}

.caja1 { 
    height: 200px;
    background-color: #d9ed92;
    border: 2px solid #000000;
}

.front {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.caja2 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}
.caja3 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja4 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja5 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja6 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja7 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja8 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja9 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja10 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja11 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja12 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja13 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja14 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}

.caja15 { 
    height: 200px;
    background-color: burlywood;
    border: 2px solid #000000;
}