@media (max-width: 1100px) {
  span.long-nav {
    display: none;
  }
}

@media (max-width: 1000px) {
  .body-wrapper {
    flex-direction: column;
  }
  a.nav, button.nav {
    -webkit-backdrop-filter: blur(1rem); /* blur webkit fix */
    backdrop-filter: blur(1rem);
  }
  .notice-section {
    position: static;
    left: 1.2rem;
    right: 1.2rem;
    margin-bottom: -0.3rem;
  }
  .content-wrapper {
    width: unset;
  }
  .navigation-section {
    width: unset;
  }
}


@media (max-width: 720px) {
  body {
    padding: 0.6rem 0.9rem;
  }
  .content-grid {
    gap: 0.6rem;
  }
  .footer {
    flex-direction: column;
  }
  .footer-nav.wide {
    display: none;
  }
  .footer-nav.narrow {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
  }
  .footer-item.center {
    display: none;
  }
  span.long-nav {
    display: inline;
  }
  .popup-window {
    margin: 0.6rem 0.9rem; /* same as body padding */
    padding: 0.6rem 0.9rem;
  }
}

@media (max-width: 480px) {
  body {
    padding: 0.4rem 0.6rem;
    gap: 0.9rem;
  }
  .header-item.switch {
    display: none;
  }
  .header-item.inner-switch {
    display: block;
  }
  .footer {
    align-items: center;
    flex-direction: column-reverse;
  }
  .footer-nav.wide {
    display: flex;
  }
  .footer-nav.narrow {
    display: none;
  }
  .popup-window {
    margin: 0.6rem; /* same as body padding */
    padding: 0.6rem;
  }
}

@media (max-width: 420px) {
  .inner-switch-wide {
    display: none;
  }
  span.long-nav {
    display: none;
  }
  span.long-nav.handle {
    display: none;
  }
}