html {
  font-size: 100px;
}

body {
  font-size: 14px;
}

/* <=  */
@media (max-width: 767.98px) {
  body {
    font-size: 12px;
  }
}

@media (max-width: 680px) {
  html {
    font-size: 80px;
  }
}

@media (max-width: 580px) {
  html {
    font-size: 70px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 60px;
  }
}

@media (max-width: 380px) {
  html {
    font-size: 50px;
  }
}

/* container */
.container {
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
  position: relative;
  z-index: 0;
}

.container-fluid {
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
}

/* >= */
@media (min-width: 768px) {
  .container {
      width: 750px;
  }
}

@media (min-width: 992px) {
  .container {
      width: 970px;
  }
}

@media (min-width: 1200px) {
  .container {
      width: 1170px;
  }
}