body, html {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  height: 100%;
}
#top-banner {
   display: flex;
   align-items: center;
   padding: 10px 20px;
   background-color: #004d40;
   color: white;
   border-bottom: 4px solid #009688;
}
#logo {
   height: 60px;
   margin-right: 20px;
}
#site-description h1 {
   margin: 0;
   font-size: 24px;
}

#container {
  display: flex;
  height: 100vh;
}

#sidebar-saved {
  width: 220px;
  background-color: #f0f0f0;
  padding: 20px 10px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
#sidebar {
  width: 20%;
  padding: 20px 10px;
  box-sizing: border-box;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
}
.category-item {
  font-size: 16px;
  padding: 15px 10px;
  margin-bottom: 10px;
  background-color: #fff;
  border-radius: 20px;
  cursor: pointer;
  text-align: center;
  box-shadow: 0 5px 9px rgba(0,0,0,0.1);
  transition: background-color 0.2s;
}
.category-item:hover {
  background-color: #e0e0e0;
}
.category-item.active {
  background-color: #ffa500;
  font-weight: bold;
  #border-left: 4px solid #ff6600;
}
#main {
  width: 80%;
  flex-grow: 1;
  padding: 1em;
}
.course-row {
  display: flex;
  align-items: center;
  margin-bottom: 1em;
  min-height: 100px;
  border-bottom: 1px solid #ccc;
}
.course-row img {
  width: 80px;
  height: 80px;
  margin-right: 20px;
}
.course-row button {
  margin-left: 10px;
}
.course-description {
   font-size: 14px;
   line-height: 1.5;
   color: #333;
   background: #fff;
   padding: 8px;
   border-radius: 4px;
   min-height: 60px;
}