:root {
  /* Light theme variables */
  --bg-primary: #ffffff;
  --bg-secondary: #f9f9f9;
  --text-primary: #333;
  --text-secondary: #555;
  --accent-primary: #ff6b00;
  --accent-secondary: #003366;
  --nav-bg: rgba(0, 51, 102, 0.95);
  --nav-text: #ffffff;
  --card-bg: #ffffff;
  --card-shadow: rgba(0, 0, 0, 0.1);
  --border-color: #eee;
  --modal-bg: #ffffff;
  --modal-overlay: rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #242424;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --accent-primary: #ff8533;
  --accent-secondary: #66b3ff;
  --nav-bg: rgba(26, 26, 26, 0.95);
  --nav-text: #ffffff;
  --card-bg: #2d2d2d;
  --card-shadow: rgba(0, 0, 0, 0.3);
  --border-color: #404040;
  --modal-bg: #2d2d2d;
  --modal-overlay: rgba(0, 0, 0, 0.9);
}

/* Theme toggle button styles */
.theme-toggle {
  background: none;
  border: none;
  color: var(--nav-text);
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  transform: translateY(-2px);
}

.theme-toggle i {
  font-size: 1.2rem;
}