/* Global box-sizing reset for consistency */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Grid container */
.promo-blocks {
  display: -ms-grid; /* IE11 fallback */
  display: grid;
  gap: 0;
  padding: 0;
  margin: 0 auto;

  /* Fallback for older browsers */
    grid-template-columns: repeat(4, 1fr);
    -ms-grid-columns: (1fr)[4]; /* IE11 fallback */
}

/* Grid items */
.promo-block {
  color: white;
  background-color: #f0f0f0;
  padding: 25px 0px 35px;
  border: 0;
  text-align: center;
  word-wrap: normal;
  width: 100%;
}

/* Medium screens (tablets) */
@media (min-width: 100px) {
  .promo-blocks {
    grid-template-columns: repeat(1, 1fr);
    -ms-grid-columns: (1fr)[1]; /* IE11 fallback */
  }
    .promo-block {
        width: 100%;
    }
}

/* Large screens (desktops) */
@media (min-width: 768px) {
  .promo-blocks {
    grid-template-columns: repeat(2, 1fr);
    -ms-grid-columns: (1fr)[2];
  }
    .promo-block {
        width: 100%;
    }
}

/* Extra large screens */
@media (min-width: 900px) {
  .promo-blocks {
    grid-template-columns: repeat(3, 1fr);
    -ms-grid-columns: (1fr)[3];
  }
}


.block1 {
  background-color: #275894;
}
.block2 {
  background-color: #c4b534;
}
.block3 {
  background-color: #27942e;
}
.block4 {
  background-color: #e47311;
}
.block5 {
  background-color: #d473bf;
}
.block6 {
  background-color: #75d8e1;
}