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

/* Root Styles */
:root {
  --primary-color: #0056b3; /* Blue */
  --secondary-color: #ffffff; /* White */
  --accent-color: #f0f4ff;
  --text-color: #333333;
  --header-height: 60px;
  --side-panel-width: 300px;
  --transition-duration: 0.3s;
  --font-family: 'Open Sans', sans-serif;
}

/* Typography */
body {
  font-family: var(--font-family);
  color: var(--text-color);
  background-color: var(--accent-color);
  line-height: 1.6;
}

h1, h2 {
  color: var(--primary-color);
}

/* App Header */
.app-header {
  background-color: var(--primary-color);
  color: var(--secondary-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: var(--header-height);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.app-header h1 {
  font-size: 1.5rem;
  font-weight: bold;
}

/* Navigation */
.navigation {
  display: flex;
  gap: 10px;
}

.nav-btn {
  background-color: var(--secondary-color);
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  border-radius: 4px;
  padding: 8px 16px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color var(--transition-duration), color var(--transition-duration);
}

.nav-btn:hover {
  background-color: var(--primary-color);
  color: var(--secondary-color);
}

/* Main Content */
.main-content {
  padding: 20px;
}

.main-content h2 {
  margin-bottom: 10px;
}

/* Side Panels */
.side-panel {
  position: fixed;
  top: var(--header-height);
  bottom: 0;
  width: var(--side-panel-width);
  background-color: var(--secondary-color);
  box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
  transform: translateX(-100%);
  transition: transform var(--transition-duration) ease-in-out;
  padding: 20px;
  overflow-y: auto;
}

/* Positioning for side panels */
#user-management-panel {
  left: 0;
}

#progress-tracking-panel {
  left: 0;
}

#reporting-panel {
  left: 0;
}

#recommendations-panel {
  left: 0;
}

/* Active Panels */
.side-panel.active {
  transform: translateX(0);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-btn {
    padding: 6px 12px;
    font-size: 0.9rem;
  }

  .main-content {
    padding: 10px;
  }

  .side-panel {
    width: 80%;
  }
}