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

/* Bootstrap Font */
body {
    font-family: "Helvetica Neue", sans-serif;
}

.text-center {
    text-align: center;
}
.bg-primary {
    background-color: dodgerblue;
}
.bg-secondary {
    background-color: lightslategray;
}
.text-light {
    color: white;
}
.border {
    border: 1px solid gray;
}
.border-dark {
    border-color: black;
}
.pt-3 {
    padding-top: 20px;
}
.pb-3 {
    padding-bottom: 20px;
}
.row {
    display: flex;
    flex-wrap: wrap;
}

/* Columns */
.col-1 {
    width: calc((100% / 12))
}
.col-2 {
    width: calc((100% / 12)*2)
}
.col-3 {
    width: calc((100% / 12)*3)
}
.col-4 {
    width: calc((100% / 12)*4)
}
.col-5 {
    width: calc((100% / 12)*5)
}
.col-6 {
    width: calc((100% / 12)*6)
}
.col-7 {
    width: calc((100% / 12)*7)
}
.col-8 {
    width: calc((100% / 12)*8)
}
.col-9 {
    width: calc((100% / 12)*9)
}
.col-10 {
    width: calc((100% / 12)*10)
}
.col-11 {
    width: calc((100% / 12)*11)
}
.col-12 {
    width: calc((100% / 12)*12)
}
@media (min-width: 576px) {
    body {
        background-color: lightyellow;
    }
}
@media (min-width: 768px) {
    body {
        background-color: lightgreen;
    }
}
@media (min-width: 992px) {
    body {
        background-color: lightblue;
    }
}
@media (min-width: 1280px) {
    body {
        background-color: lightblue;
    }
}