:root {
  /* Light theme colors */
  --primary-color: #6366F1;
  --secondary-color: #8B5CF6;
  --surface-color: #FFFFFF;
  --background-color: #F8FAFC;
  --on-surface-color: #1F2937;
  --on-background-color: #1F2937;
  --outline-color: #E5E7EB;
  --success-color: #10B981;
  --warning-color: #F59E0B;
  --error-color: #EF4444;
  --urgent-color: #DC2626;
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --border-color: #E5E7EB;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --overlay-color: rgba(0, 0, 0, 0.5);
}

.dark {
  /* Dark theme colors */
  --primary-color: #6366F1;
  --secondary-color: #8B5CF6;
  --surface-color: #1A1A2E;
  --background-color: #0F0F23;
  --on-surface-color: #FFFFFF;
  --on-background-color: #FFFFFF;
  --outline-color: #2D2D44;
  --success-color: #10B981;
  --warning-color: #F59E0B;
  --error-color: #EF4444;
  --urgent-color: #DC2626;
  --text-primary: #FFFFFF;
  --text-secondary: #D1D5DB;
  --text-muted: #9CA3AF;
  --border-color: #2D2D44;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --overlay-color: rgba(0, 0, 0, 0.7);
}

/* Priority colors */
.priority-low {
  color: var(--success-color);
}

.priority-medium {
  color: var(--warning-color);
}

.priority-high {
  color: var(--error-color);
}

.priority-urgent {
  color: var(--urgent-color);
}

/* Calendar specific styles */
.calendar-header {
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
}

.calendar-view-button {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 16px;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s ease;
}

.calendar-view-button:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.calendar-view-button.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.calendar-time-slot {
  border-bottom: 1px solid var(--border-color);
  height: 60px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.calendar-time-slot:hover {
  background-color: var(--primary-color);
  opacity: 0.1;
}

.calendar-event {
  background-color: var(--primary-color);
  opacity: 0.1;
  border: 1px solid var(--primary-color);
  border-radius: 8px;
  padding: 8px;
  margin: 2px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.calendar-event:hover {
  opacity: 0.2;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px var(--shadow-color);
}

.calendar-event.dragging {
  opacity: 0.8;
  transform: rotate(5deg);
  box-shadow: 0 8px 16px var(--shadow-color);
}

/* Responsive design */
@media (max-width: 768px) {
  .calendar-header {
    padding: 16px;
  }
  
  .calendar-view-button {
    padding: 6px 12px;
    font-size: 12px;
  }
}

/* Animation classes */
.fade-in {
  animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-in {
  animation: slideIn 0.3s ease-in-out;
}

@keyframes slideIn {
  from {
    transform: translateX(-20px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}