/* Base row */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
}

[class*="col-"] {
    padding-right: 15px;
    padding-left: 15px;
    box-sizing: border-box;
}

/* Default (xs <576px) – works automatically with .col-* */
.col-1  { flex: 0 0 8.333%;  max-width: 8.333%; }
.col-2  { flex: 0 0 16.666%; max-width: 16.666%; }
.col-3  { flex: 0 0 25%;     max-width: 25%; }
.col-4  { flex: 0 0 33.333%; max-width: 33.333%; }
.col-5  { flex: 0 0 41.666%; max-width: 41.666%; }
.col-6  { flex: 0 0 50%;     max-width: 50%; }
.col-7  { flex: 0 0 58.333%; max-width: 58.333%; }
.col-8  { flex: 0 0 66.666%; max-width: 66.666%; }
.col-9  { flex: 0 0 75%;     max-width: 75%; }
.col-10 { flex: 0 0 83.333%; max-width: 83.333%; }
.col-11 { flex: 0 0 91.666%; max-width: 91.666%; }
.col-12 { flex: 0 0 100%;    max-width: 100%; }

/* Small devices ≥576px */
@media (min-width: 576px) {
    .col-sm-1  { flex: 0 0 8.333%;  max-width: 8.333%; }
    .col-sm-2  { flex: 0 0 16.666%; max-width: 16.666%; }
    .col-sm-3  { flex: 0 0 25%;     max-width: 25%; }
    .col-sm-4  { flex: 0 0 33.333%; max-width: 33.333%; }
    .col-sm-5  { flex: 0 0 41.666%; max-width: 41.666%; }
    .col-sm-6  { flex: 0 0 50%;     max-width: 50%; }
    .col-sm-7  { flex: 0 0 58.333%; max-width: 58.333%; }
    .col-sm-8  { flex: 0 0 66.666%; max-width: 66.666%; }
    .col-sm-9  { flex: 0 0 75%;     max-width: 75%; }
    .col-sm-10 { flex: 0 0 83.333%; max-width: 83.333%; }
    .col-sm-11 { flex: 0 0 91.666%; max-width: 91.666%; }
    .col-sm-12 { flex: 0 0 100%;    max-width: 100%; }
}

/* Medium devices ≥768px */
@media (min-width: 768px) {
    .col-md-1  { flex: 0 0 8.333%;  max-width: 8.333%; }
    .col-md-2  { flex: 0 0 16.666%; max-width: 16.666%; }
    .col-md-3  { flex: 0 0 25%;     max-width: 25%; }
    .col-md-4  { flex: 0 0 33.333%; max-width: 33.333%; }
    .col-md-5  { flex: 0 0 41.666%; max-width: 41.666%; }
    .col-md-6  { flex: 0 0 50%;     max-width: 50%; }
    .col-md-7  { flex: 0 0 58.333%; max-width: 58.333%; }
    .col-md-8  { flex: 0 0 66.666%; max-width: 66.666%; }
    .col-md-9  { flex: 0 0 75%;     max-width: 75%; }
    .col-md-10 { flex: 0 0 83.333%; max-width: 83.333%; }
    .col-md-11 { flex: 0 0 91.666%; max-width: 91.666%; }
    .col-md-12 { flex: 0 0 100%;    max-width: 100%; }
}

/* Large devices ≥992px */
@media (min-width: 992px) {
    .col-lg-1  { flex: 0 0 8.333%;  max-width: 8.333%; }
    .col-lg-2  { flex: 0 0 16.666%; max-width: 16.666%; }
    .col-lg-3  { flex: 0 0 25%;     max-width: 25%; }
    .col-lg-4  { flex: 0 0 33.333%; max-width: 33.333%; }
    .col-lg-5  { flex: 0 0 41.666%; max-width: 41.666%; }
    .col-lg-6  { flex: 0 0 50%;     max-width: 50%; }
    .col-lg-7  { flex: 0 0 58.333%; max-width: 58.333%; }
    .col-lg-8  { flex: 0 0 66.666%; max-width: 66.666%; }
    .col-lg-9  { flex: 0 0 75%;     max-width: 75%; }
    .col-lg-10 { flex: 0 0 83.333%; max-width: 83.333%; }
    .col-lg-11 { flex: 0 0 91.666%; max-width: 91.666%; }
    .col-lg-12 { flex: 0 0 100%;    max-width: 100%; }
}

/* Extra large devices ≥1200px */
@media (min-width: 1200px) {
    .col-xl-1  { flex: 0 0 8.333%;  max-width: 8.333%; }
    .col-xl-2  { flex: 0 0 16.666%; max-width: 16.666%; }
    .col-xl-3  { flex: 0 0 25%;     max-width: 25%; }
    .col-xl-4  { flex: 0 0 33.333%; max-width: 33.333%; }
    .col-xl-5  { flex: 0 0 41.666%; max-width: 41.666%; }
    .col-xl-6  { flex: 0 0 50%;     max-width: 50%; }
    .col-xl-7  { flex: 0 0 58.333%; max-width: 58.333%; }
    .col-xl-8  { flex: 0 0 66.666%; max-width: 66.666%; }
    .col-xl-9  { flex: 0 0 75%;     max-width: 75%; }
    .col-xl-10 { flex: 0 0 83.333%; max-width: 83.333%; }
    .col-xl-11 { flex: 0 0 91.666%; max-width: 91.666%; }
    .col-xl-12 { flex: 0 0 100%;    max-width: 100%; }
}

/* Extra extra large devices ≥1400px */
@media (min-width: 1400px) {
    .col-xxl-1  { flex: 0 0 8.333%;  max-width: 8.333%; }
    .col-xxl-2  { flex: 0 0 16.666%; max-width: 16.666%; }
    .col-xxl-3  { flex: 0 0 25%;     max-width: 25%; }
    .col-xxl-4  { flex: 0 0 33.333%; max-width: 33.333%; }
    .col-xxl-5  { flex: 0 0 41.666%; max-width: 41.666%; }
    .col-xxl-6  { flex: 0 0 50%;     max-width: 50%; }
    .col-xxl-7  { flex: 0 0 58.333%; max-width: 58.333%; }
    .col-xxl-8  { flex: 0 0 66.666%; max-width: 66.666%; }
    .col-xxl-9  { flex: 0 0 75%;     max-width: 75%; }
    .col-xxl-10 { flex: 0 0 83.333%; max-width: 83.333%; }
    .col-xxl-11 { flex: 0 0 91.666%; max-width: 91.666%; }
    .col-xxl-12 { flex: 0 0 100%;    max-width: 100%; }
}