/* Reset margin and padding for consistency */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.flex-container {
  display: flex;
  justify-content: space-between;
}

.flex-container-vert {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.btn-nav {
  background-color: #3498db; /* Modern, professional blue */
  color: white;
  border: none;
  padding: 12px 24px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
  border-radius: 5px; /* Slightly rounded corners */
  font-family: Arial, sans-serif;
  font-weight: 600;
  transition: background-color 0.3s ease, transform 0.1s ease;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.btn-nav:hover {
  background-color: #2980b9; /* Slightly darker blue on hover */
  transform: translateY(-2px); /* Subtle lift effect */
}

.btn-nav:active {
  transform: translateY(1px); /* Pressed effect */
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Style for the header */
header {
  background-color: #4CAF50; /* Green background */
  color: white;
  text-align: center;
  padding: 20px;
}

/* Flexbox container for content */
.content {
  display: flex;
  justify-content: space-between;
  height: 100vh; /* Full viewport height */
  margin: 0;
  padding: 0;
}

/* Left section styles */
.left-section {
  width: 25%; /* 1/4 of the total width */
  background-color: #f0f0f0; /* Light gray background */
}

/* Main body section styles */
.main-body {
  width: 50%; /* 2/4 of the total width */
  background-color: #e3f2fd; /* Light blue background */
}

/* Right section styles */
.right-section {
  width: 25%; /* 1/4 of the total width */
  background-color: #ffeb3b; /* Yellow background */
}

/* Footer styles */
footer {
  background-color: #333; /* Dark background */
  color: white;
  text-align: center;
  padding: 10px;
  width: 100%;
  bottom: 0;
}