* {
  box-sizing: border-box;
  color: var(--gray0);
}

a {
  color: var(--gray3);
}

div {
  background-color: var(--background);
}

.row::after {
  content: "";
  clear: both;
  display: table;
}

[class*="col-"] {
  float: left;
  padding: 15px;
}

html {
  font-family: "Lucida Sans", sans-serif;
  background-color: var(--gray0);
}

.header {
  background-color: var(--gray2);
  padding: 15px;
}

.header * {
  color: var(--background);
}

.menu ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

.menu ul a {
  text-decoration: none;
}

.menu a li {
  padding: 8px;
  margin-bottom: 7px;
  background-color: var(--gray2);
  color: var(--background);
  box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}

.menu a li:hover {
  background-color: var(--gray3);
}

.menu a li.current  {
  background-color: var(--gray1);
}

.aside {
  background-color: #33b5e5;
  padding: 15px;
  color: var(--background);
  text-align: center;
  font-size: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}

.footer {
  background-color: var(--gray2);
  color: #ffffff;
  text-align: center;
  font-size: 12px;
  padding: 15px;
}

.footer * {
 color: var(--background);
}

/* For mobile phones: */
[class*="col-"] {
  width: 100%;
}

@media only screen and (min-width: 600px) {
  /* For tablets: */
  .col-s-1 {width: 8.33%;}
  .col-s-2 {width: 16.66%;}
  .col-s-3 {width: 25%;}
  .col-s-4 {width: 33.33%;}
  .col-s-5 {width: 41.66%;}
  .col-s-6 {width: 50%;}
  .col-s-7 {width: 58.33%;}
  .col-s-8 {width: 66.66%;}
  .col-s-9 {width: 75%;}
  .col-s-10 {width: 83.33%;}
  .col-s-11 {width: 91.66%;}
  .col-s-12 {width: 100%;}
}
@media only screen and (min-width: 768px) {
  /* For desktop: */
  .col-1 {width: 8.33%;}
  .col-2 {width: 16.66%;}
  .col-3 {width: 25%;}
  .col-4 {width: 33.33%;}
  .col-5 {width: 41.66%;}
  .col-6 {width: 50%;}
  .col-7 {width: 58.33%;}
  .col-8 {width: 66.66%;}
  .col-9 {width: 75%;}
  .col-10 {width: 83.33%;}
  .col-11 {width: 91.66%;}
  .col-12 {width: 100%;}
  .main-container {
    width: 768px;
    margin-left: auto;
    margin-right: auto;
    clear: both;
  }
}