:root {
  /* 10px */
  font-size: 62.5%;

  --bg-light-hsl: 220, 28%, 95%;
  --sample: hsl(220, 28%, 95%);
  --bg-hsl: 220, 28%, 50%;
  --sample: hsl(220, 28%, 50%);
  --bg-dark-hsl: 220, 28%, 25%;
  --sample: hsl(220, 28%, 25%);
  --text-light-hsl: 0, 0%, 95%;
  --sample: hsl(0, 0%, 95%);
  --text-hsl: 0, 0%, 50%;
  --sample: hsl(0, 0%, 50%);
  --text-dark-hsl: 0, 0%, 20%;
  --sample: hsl(0, 0%, 20%);
}

body {
  /* 16px */
  font-size: 1.6rem;
  font-family: "Yekan", sans-serif;
}

/* this font is FD version, meaning it does not support latin digits */
@font-face {
  font-family: Shabnam;
  src: url('Modules/Shabnam-FD.eot');
  src: url('Modules/Shabnam-FD.woff') format('woff'),
       url('Modules/Shabnam-FD.ttf') format('truetype');
  font-weight: normal;
}

@font-face {
  font-family: Yekan;
  src: url('Modules/Yekan.eot');
  src: url('Modules/Yekan.woff') format('woff'),
       url('Modules/Yekan.ttf') format('truetype');
  font-weight: normal;
}

footer {
  color: hsl(var(--bg-dark-hsl));
  background-color: hsl(var(--bg-dark-hsl), 30%);

}

@media screen and (max-width: 576px) {
  :root {
    /* down from 62.5% */
    font-size: 50%;
  }
}

@media screen and (min-width: 576px) and (max-width:700px) {
  .navbar-brand {
    font-size: 1.6rem !important;
  }

  .navbar ul li a {
    font-size: 1.1rem !important;
  }

  .navbar button {
    font-size: 1rem !important;
  }
}