:root {
  /* Primario - Azul institucional */
  --primary-50: #EFF6FF;
  --primary-500: #3B82F6;
  --primary-600: #2563EB;
  --primary-700: #1D4ED8;
  
  /* Grises neutros */
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-500: #6B7280;
  --gray-700: #374151;
  --gray-900: #111827;
  
  /* Estados */
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  
  /* Prioridades */
  --priority-normal: transparent;
  --priority-important: #FEF3C7;
  --priority-urgent: #FEE2E2;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Utilidades custom */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-weight: 500;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--primary-500);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-600);
}

.btn-secondary {
  background-color: var(--gray-100);
  color: var(--gray-700);
}

.btn-secondary:hover {
  background-color: var(--gray-200);
}

.btn-danger {
  background-color: var(--danger);
  color: white;
}

.btn-danger:hover {
  opacity: 0.9;
}

/* Course colors */
.course-blue { background-color: #3B82F6; }
.course-green { background-color: #10B981; }
.course-red { background-color: #EF4444; }
.course-orange { background-color: #F97316; }
.course-purple { background-color: #8B5CF6; }
.course-pink { background-color: #EC4899; }
.course-yellow { background-color: #EAB308; }
.course-cyan { background-color: #06B6D4; }
.course-lime { background-color: #84CC16; }
.course-indigo { background-color: #6366F1; }

/* Priority styles */
.priority-normal {
  background-color: var(--priority-normal);
}

.priority-important {
  background-color: var(--priority-important);
}

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

/* Card con sombra */
.card {
  background: white;
  border-radius: 0.75rem;
  padding: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Event card con borde de color */
.event-card {
  position: relative;
  padding-left: 1.5rem;
}

.event-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  border-radius: 4px;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Input styles */
.input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--gray-200);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: all 0.2s;
}

.input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Textarea */
.textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--gray-200);
  border-radius: 0.5rem;
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
  min-height: 100px;
}

.textarea:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Select */
.select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--gray-200);
  border-radius: 0.5rem;
  font-size: 1rem;
  background-color: white;
  cursor: pointer;
}

.select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Checkbox */
.checkbox {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--gray-300);
  border-radius: 0.25rem;
  cursor: pointer;
}

.checkbox:checked {
  background-color: var(--primary-500);
  border-color: var(--primary-500);
}

/* Toggle switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--gray-300);
  transition: 0.3s;
  border-radius: 24px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
}

.toggle input:checked + .toggle-slider {
  background-color: var(--primary-500);
}

.toggle input:checked + .toggle-slider:before {
  transform: translateX(20px);
}

/* FAB - Floating Action Button */
.fab {
  position: fixed;
  bottom: 80px;
  right: 1rem;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--primary-500);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  transition: transform 0.2s;
}

.fab:hover {
  transform: scale(1.1);
}

.fab:active {
  transform: scale(0.95);
}

/* Modal overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-content {
  background: white;
  border-radius: 1rem;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 1.5rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Bottom navbar */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-around;
  padding: 0.5rem 0;
  z-index: 100;
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem;
  color: var(--gray-500);
  text-decoration: none;
  font-size: 0.75rem;
  transition: color 0.2s;
}

.bottom-nav-item.active {
  color: var(--primary-500);
}

.bottom-nav-item:hover {
  color: var(--primary-600);
}

/* Animaciones */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.3s ease-in;
}

.slide-up {
  animation: slideUp 0.3s ease-out;
}

/* Responsive adjustments */
@media (min-width: 640px) {
  .container {
    padding: 0 2rem;
  }
}

@media (min-width: 1024px) {
  .modal-content {
    max-width: 800px;
  }
}