@media (max-width: 900px) {

  /* HEADER */
  .site-header {
    position: relative;
    height: auto;
    padding: 15px 20px;
    flex-wrap: wrap;
  }

  /* HAMBURGER */
  .nav-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 32px;
    color: #ffffff;
    cursor: pointer;
  }

  /* NAV */
  .main-nav {
    width: 100%;
  }

  /* MENU – SKRYTÉ */
  .main-nav ul {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;

    background: #498c4b;
    flex-direction: column;
    display: none;

    padding: 15px 0;
    border-radius: 0 0 15px 15px;
    z-index: 999;
  }

  /* MENU – OTVORENÉ */
  .main-nav ul.active {
    display: flex;
  }

  .main-nav li {
    width: 100%;
    text-align: center;
  }

  .main-nav a,
  .dropdown-toggle {
    width: 100%;
    padding: 15px;
    justify-content: center;
  }

  /* DROPDOWN */
  .dropdown-menu {
    position: static;
    display: none;
    background: #3f7a42;
    border-radius: 0;
  }

  .dropdown.open .dropdown-menu {
    display: flex;
  }
}
/* =========================
   HERO – MOBILE
   ========================= */
@media (max-width: 900px) {

  .hero {
    padding: 30px 20px 40px;
  }

  .hero h1 {
    font-size: 2.4em;
    line-height: 1.2;
  }

  .hero p {
    font-size: 1.2em;
    margin-bottom: 25px;
  }

  /* TLAČIDLO POD TEXT */
  .hero-btn {
    position: static;       /* zruší absolute z desktopu */
    margin: 0 auto;         /* vycentruje */
    display: inline-block;
    font-size: 1.1em;
    padding: 14px 26px;
  }
}