* {
  box-sizing: border-box;
}

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

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

html {
  font-family: "Lucida Sans", sans-serif;
  color: yellow;
  background-color: black;
}

blockquote {
  font-style: italic;
}

.header {
  background-color: #274d5f;
  text-align: center;
  color: #ffffff;
  padding: 15px;
}

a:link {
  text-decoration: none;
  color: white;
}

a:visited {
  text-decoration: none;
  color: orange;
}

a:hover {
  text-decoration: underline;
}

a:active {
  text-decoration: underline;
}

.aside {
  background-color: #00a564;
  background-repeat: no-repeat;
  background-size: cover;
  padding: 15px;
  color: white;
  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);
}

.aside a:visited {
  color: #fffff;
}

.thumbnails {
  text-align: center;
}

.footer {
  background-color: #00a564;
  color: #ffffff;
  text-align: center;
  font-size: 12px;
  padding: 15px;
}

/* 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: 20%;}
  .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: 20%;}
  .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%;}
}

.collapsible {
  background-color: #777;
  color: white;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
}

.active, .collapsible:hover {
  background-color: #555;
}

.paroles {
  padding: 0 18px;
  display: none;
  overflow: hidden;
  background-color: #f1f1f1;
  color: black;
}

.iframe-container {
  overflow: hidden;
  padding-top: 56.25%;
  position: relative;
}
 
.iframe-container iframe {
   border: 0;
   height: 100%;
   left: 0;
   position: absolute;
   top: 0;
   width: 100%;
}
 
/* 4x3 Aspect Ratio */
.iframe-container-4x3 {
  padding-top: 75%;
}