/* Basic Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  display: flex;
  min-height: 100vh;
  background-color: #f4f7fa;
}

/* Sidebar Styling */
.sidebar {
  width: 250px;
  background-color: #333;
  color: white;
  padding: 20px;
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  overflow-y: auto;
}

.sidebar h2 {
  font-size: 1.5em;
  margin-bottom: 20px;
  text-align: center;
}

.tree-menu {
  list-style: none;
  padding-left: 0;
}

.tree-menu li {
  margin: 5px 0;
}

.tree-menu a {
  color: white;
  text-decoration: none;
  padding: 8px 10px;
  display: block;
  background-color: #444;
  border-radius: 4px;
}

.tree-menu a:hover {
  background-color: #555;
}

.tree-menu .submenu {
  list-style: none;
  padding-left: 20px;
  display: none;
}

.tree-menu .submenu li {
  margin: 5px 0;
}

.tree-menu .submenu a {
  background-color: #555;
}

/* Content Area */
.content {
  margin-left: 250px;
  padding: 20px;
  width: 100%;
}

header {
  color: white;
  padding: 1em;
  text-align: center;
  background-color: #2196F3;
  border-radius: 8px;
  margin-bottom: 20px;
}

.tile-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  padding: 20px;
  justify-items: center;
  width: 100%;
  max-width: 1200px;
}

.tile {
  background-color: #f1f1f1;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 200px;
}

.tile:hover {
  transform: translateY(-10px);
  box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
}

.tile h3 {
  font-size: 1.5em;
  margin-bottom: 10px;
}

.tile p {
  font-size: 1em;
  margin-bottom: 20px;
  flex-grow: 1;
}

.tile-link {
  text-decoration: none;
  color: #007BFF;
  font-weight: bold;
  transition: color 0.3s;
}

.tile-link:hover {
  color: #0056b3;
}

/* Footer */
footer {
  text-align: center;
  background-color: #333;
  color: white;
  padding: 1em;
  position: fixed;
  width: 100%;
  bottom: 0;
}