* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

.header {
  padding: 10px;
  width: 12%;
  white-space: nowrap;
  vertical-align: middle;
}

.topnav {
  overflow: hidden;
  display: flex;
  width: 80%;
}

.topnav a {
  float: left;
  display: block;
}

.topnav a:hover {
  background-color: #fff;
  color: black;
}

.panel {
	height: 0px;
	overflow: hidden;
}
.panel.visible {
	height: auto;
}

.column {
  float: left;
}

.sidebar {
padding: 10px;
}

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

.sidebar li {
  display: block;
  padding: 5px;
}

.main {
 padding: 10px;
}

.row {  
  display: flex;
  flex-wrap: wrap;
}

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

.footer {
  background-color: #F1F1F1;
  text-align: center;
  padding: 10px;
  width: 100%;
}
.footer-text {
  font-size: 0.8rem;
}

@media screen and (max-width: 699px) {
  .column.sidebar, .column.main {
    width: 100%;
  }
  .header, .topnav {
    width: 100%;
  }
  .topnav {
  flex-direction: column;
  padding: 5px;
  }
  .topnav a {
  display: block;
  padding: 5px;
  }
  .header h1 {
  float: left;
 }
  .header button {
  float: right;
 }
  .footer {
  width: 100%;
 }
}
@media screen and (min-width: 700px) and (max-width: 950px) {
  .container {
  padding: 5px;
  }
  .column.sidebar, .column.main {
    width: 100%;
  }
  .header, .topnav {
    width: 100%;
  }
  .column.main {
  width: 75%;
 }
  .topnav {
  flex-direction: column;
  padding: 5px;
  }
  .topnav a {
  display: block;
  padding: 5px;
  }
  .header h1 {
  float: left;
 }
  .header button {
  float: right;
 }
}
@media screen and (min-width: 950px) {
  .container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 75vw;
 }
.column.sidebar {
  width: 15vw;
}
.column.main {
  width: 56.5vw;
  overflow-y: auto;
  overflow-x: hidden;
  max-height: 65vh;
}
  .header {
  width: 15vw;
  height: 10vh;
 }
  .header h1 {
  font-size: 1.5vw;
  position: relative;
  top: 1.5vh;
  max-height: 10vh;
 }
  .topnav {
  overflow-x: auto;
  overflow-y: hidden;
 }
  .topnav a {
  position: relative;
  top: 3vh;
  color: #000;
  border: 2px solid #000;
  border-radius: 20px;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  margin: 5px;
  background-color: #F1F1F1;
  font-size: 1.1vw;
 }
  .mobile-only {
  display: none;
  }
  .footer {
  width: /*71.5vw;*/100%;
 }
}
.rev { unicode-bidi: bidi-override; direction: rtl; }
.obem { position: absolute; display:inline-block; z-index: -1; width: 0px; height: 0px; overflow: hidden; };