html, body {
  margin: 0;
  padding: 0;
  /*height: 100%;*/
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.u-stick-footer {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.u-stick-footer .u-footer {
  margin-top: auto;
}

#block-2{
    flex: 1;                 /* Ocupa todo el espacio entre header y footer */
    display: flex;
    justify-content: center; /* Centrado horizontal */
    align-items: center;     /* Centrado vertical */
    background: #f0f0f0;
}

#block-3{
  justify-content: center;
  text-align: justify;
  text-align-last: center;
}

 .u-section-1 {
  background-repeat: repeat, no-repeat;
  background-image: url('images/square_bg.png'), linear-gradient(to bottom, rgba(242, 242, 242, 1), rgba(242, 242, 242, 1));
  background-position: 0px 0px;
  background-size: 10%;
}

.u-section-1 .u-sheet-1 {
  min-height: 192px;
}

.u-section-1 .u-text-1 {
  font-size: 1.875rem;
  font-weight: 700;
  margin: 30px auto 0;
}

.u-section-1 .u-text-2 {
  font-size: 1rem;
  line-height: 1;
  margin: 7px auto 43px;
}

@media (max-width: 1199px) {
  .u-section-1 .u-sheet-1 {
    min-height: 158px;
  }
}

@media (max-width: 991px) {
  .u-section-1 .u-sheet-1 {
    min-height: 142px;
  }

  .u-section-1 .u-text-1 {
    width: auto;
    margin-top: 15px;
  }

  .u-section-1 .u-text-2 {
    width: auto;
    margin-top: 0;
    margin-bottom: 15px;
  }
}

@media (max-width: 767px) {
  .u-section-1 .u-sheet-1 {
    min-height: 131px;
  }

  .u-section-1 .u-text-1 {
    font-size: 1.6666666666666665rem;
  }
}

@media (max-width: 575px) {
  .u-section-1 .u-sheet-1 {
    min-height: 102px;
  }

  .u-section-1 .u-text-1 {
    font-size: 1.125rem;
  }

  .u-section-1 .u-text-2 {
    font-size: 0.875rem;
    margin: 7px 9px 8px;
  }
}.u-section-2 .u-sheet-1 {
  min-height: 652px;
}

.u-section-2 .u-custom-html-1 {
  height: auto;
  min-height: 577px;
  margin: 39px 0 36px;
}

@media (max-width: 1199px) {
  .u-section-2 .u-sheet-1 {
    min-height: 517px;
  }

  .u-section-2 .u-custom-html-1 {
    margin-bottom: 32px;
    min-height: 453px;
    margin-top: 32px;
    margin-right: initial;
    margin-left: initial;
  }
}

@media (max-width: 991px) {
  .u-section-2 .u-sheet-1 {
    min-height: 407px;
  }

  .u-section-2 .u-custom-html-1 {
    margin-bottom: 9px;
    min-height: 389px;
    margin-top: 9px;
    margin-right: initial;
    margin-left: initial;
  }
}

@media (max-width: 767px) {
  .u-section-2 .u-sheet-1 {
    min-height: 302px;
  }

  .u-section-2 .u-custom-html-1 {
    min-height: 266px;
    margin-top: 17px;
    margin-bottom: 18px;
    margin-right: initial;
    margin-left: initial;
  }
}

@media (max-width: 575px) {
  .u-section-2 .u-sheet-1 {
    min-height: 248px;
  }

  .u-section-2 .u-custom-html-1 {
    margin-bottom: 27px;
    min-height: 205px;
    margin-top: 16px;
    margin-right: initial;
    margin-left: initial;
  }
}