/* ========== BASE ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

img {
  max-width: 100%;
}

/* ========== CONTAINER ========== */
.container {
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin: 0 auto;
}

@media (min-width: 576px) {
  .container { max-width: 540px; }
}
@media (min-width: 768px) {
  .container { max-width: 720px; }
}
@media (min-width: 992px) {
  .container { max-width: 960px; }
}
@media (min-width: 1200px) {
  .container { max-width: 1140px; }
}

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

/* gutter Y (gy-4 ≈ 1.5rem) */
.gy-4 > * {
  margin-top: 1.5rem;
}

/* columns */
.col {
  padding-left: 15px;
  padding-right: 15px;
  flex: 1 0 0%;
}

.col-12 {
  flex: 0 0 100%;
  max-width: 100%;
}

/* md breakpoint */
@media (min-width: 768px) {
  .col-md-6 {
    flex: 0 0 50%;
    max-width: 50%;
  }
  .col-md-4 {
    flex: 0 0 33.333%;
    max-width: 33.333%;
  }
}

/* lg breakpoint */
@media (min-width: 992px) {
  .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-7 {
    flex: 0 0 58.333%;
    max-width: 58.333%;
  }
  .col-lg-6 {
    flex: 0 0 50%;
    max-width: 50%;
  }
  .col-lg-12 {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

/* ========== FLEX UTILITIES ========== */
.d-flex { display: flex; }

.flex-column { flex-direction: column; }

.flex-wrap { flex-wrap: wrap; }

.justify-content-between {
  justify-content: space-between;
}

.align-items-center {
  align-items: center;
}

.w-100 { width: 100%; }

/* responsive flex */
@media (min-width: 992px) {
  .flex-lg-row { flex-direction: row; }
  .flex-lg-nowrap { flex-wrap: nowrap; }
  .d-lg-none { display: none; }
}

/* ========== SPACING ========== */
.mt-3 { margin-top: 1rem; }

.m-0 { margin: 0; }