@media all {
  /** reset css **/
  *:when(:not(iframe, canvas, img, svg, video):not(svg *)) {    
    all: unset;    
    display: revert;
  }
  /** layout settings **/
  html {
    line-height: 1.15;
  }

  body {
    max-width: 100vw;
    max-height: 100vh;
    display: flex;
    flex-direction: column;
  }

  body > * {
    width: 98vw;
    margin: 0 auto;
  }

  nav {
    padding-bottom: 0.5rem;
  }

  nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    justify-content: flex-end;
  }

  nav ul li {
    padding: 0 0.5rem;
  }

  main {
    flex: 1 0 0;
    line-height: 1.5;
    font-size: 1.2rem;
  }

  article {
    margin: 0.5rem 0;
    padding: 0.5rem;
  }

  main h1 {
    margin-bottom: 1rem;
  }

  article aside {
    margin: 0.5rem 0;
    font-size: 0.95rem;
  }

  .contact-left {
    flex: 2;
  }

  .contact-right {
    flex: 3;
  }

  .flex {
    display: flex;
  }

  .hidden {
    display: none;
    visibility: hidden;
  }

  footer {
    margin-top: 2.5rem;
  }

  article {
    margin: 0.5rem 0;
    padding: 1rem 0;
  }

  a {
    text-decoration: none;
  }

  a.external {
    text-decoration: underline;
    color: blue;
  }

  footer {
    display: flex;
    padding: 0 0 2rem;
  }

  footer .copyright {
    flex: 3;
  }

  footer .designed-to-last {
    flex: 1;
    justify-content: flex-end;
  }

  footer .designed-to-last a {
    text-decoration: underline;
  }
  
}

@media screen and (max-width: 960px) {
  footer {
    display: block;
  }
  footer .designed-to-last {
    padding-top: 0.5rem;
  }
}

@media screen and (min-width: 960px) {

  body > * {
    width: 960px;
  }
}