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

:root {
  --primary-color: #4285f4;
  --secondary-color: #34a853;
  --danger-color: #ea4335;
  --warning-color: #fbbc04;
  --bg-color: #f8f9fa;
  --card-bg: #ffffff;
  --text-color: #202124;
  --text-secondary: #5f6368;
  --border-color: #dadce0;
  --shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-hover: 0 4px 6px rgba(0,0,0,0.16), 0 4px 6px rgba(0,0,0,0.23);
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

/* Header */
.header {
  background: linear-gradient(135deg, var(--primary-color) 0%, #5e97f6 100%);
  color: white;
  padding: 30px;
  border-radius: 12px;
  margin-bottom: 30px;
  text-align: center;
  box-shadow: var(--shadow);
}

.header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.header p {
  font-size: 1.1rem;
  opacity: 0.95;
}

/* Navegación por tabs */
.nav-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
  background: var(--card-bg);
  padding: 10px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.tab-btn {
  flex: 1;
  padding: 12px 20px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.tab-btn:hover {
  background: var(--bg-color);
}

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

/* Tabs content */
.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

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

/* Section header */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  flex-wrap: wrap;
  gap: 15px;
}

.section-header h2 {
  font-size: 1.8rem;
  color: var(--text-color);
}

.filters {
  display: flex;
  gap: 10px;
  align-items: center;
}

.filters select {
  padding: 8px 15px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.95rem;
  cursor: pointer;
}

/* Botones */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.btn-primary:hover {
  background: #357ae8;
  box-shadow: var(--shadow-hover);
}

.btn-secondary {
  background: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: #e8eaed;
}

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

.btn-danger:hover {
  background: #d33b2c;
}

.btn-icon {
  padding: 8px 12px;
  font-size: 1.2rem;
}

/* Loading */
.loading {
  text-align: center;
  padding: 60px 20px;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--bg-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Actividades Grid */
.actividades-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 20px;
}

.actividad-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border-left: 4px solid var(--primary-color);
}

.actividad-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.actividad-card.cancelada {
  border-left-color: var(--danger-color);
  opacity: 0.7;
}

.actividad-card.completada {
  border-left-color: var(--secondary-color);
}

.actividad-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 15px;
}

.actividad-titulo {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 5px;
}

.actividad-estado {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

.actividad-estado.activa {
  background: #e8f5e9;
  color: #2e7d32;
}

.actividad-estado.completada {
  background: #e3f2fd;
  color: #1565c0;
}

.actividad-estado.cancelada {
  background: #ffebee;
  color: #c62828;
}

.actividad-info {
  margin-bottom: 15px;
}

.actividad-info-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.actividad-descripcion {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.actividad-participantes {
  margin-bottom: 15px;
}

.participantes-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.participante-badge {
  background: var(--bg-color);
  padding: 4px 10px;
  border-radius: 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.actividad-actions {
  display: flex;
  gap: 10px;
  padding-top: 15px;
  border-top: 1px solid var(--border-color);
}

.btn-small {
  padding: 6px 12px;
  font-size: 0.9rem;
}

/* Formulario */
.form-actividad {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  max-width: 800px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-color);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
}

.participantes-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 10px;
  padding: 15px;
  background: var(--bg-color);
  border-radius: 8px;
  max-height: 300px;
  overflow-y: auto;
}

.participante-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  background: var(--card-bg);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.participante-checkbox:hover {
  background: #f1f3f4;
}

.participante-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.participante-info {
  flex: 1;
}

.participante-nombre {
  font-weight: 500;
  color: var(--text-color);
}

.participante-email {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.help-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

.form-actions {
  display: flex;
  gap: 15px;
  margin-top: 25px;
}

.form-message {
  margin-top: 20px;
  padding: 15px;
  border-radius: 8px;
  display: none;
}

.form-message.success {
  background: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #a5d6a7;
  display: block;
}

.form-message.error {
  background: #ffebee;
  color: #c62828;
  border: 1px solid #ef9a9a;
  display: block;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.empty-state p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  animation: fadeIn 0.3s ease;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0,0,0,0.3);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { transform: translateY(50px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-close {
  float: right;
  font-size: 2rem;
  font-weight: bold;
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-color);
}

.modal-content h2 {
  margin-bottom: 25px;
  color: var(--text-color);
}

/* Calendario */
.calendar-controls {
  display: flex;
  align-items: center;
  gap: 15px;
}

.current-month {
  font-size: 1.2rem;
  font-weight: 600;
  min-width: 200px;
  text-align: center;
}

.calendar-view {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 30px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
}

.calendar-header {
  text-align: center;
  font-weight: 600;
  padding: 15px 10px;
  background: var(--bg-color);
  border-radius: 8px;
  color: var(--text-secondary);
}

.calendar-day {
  aspect-ratio: 1;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  min-height: 80px;
}

.calendar-day:hover {
  background: var(--bg-color);
  border-color: var(--primary-color);
}

.calendar-day.selected {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.calendar-day.other-month {
  opacity: 0.3;
  pointer-events: none;
}

.calendar-day.today {
  background: #fff3e0;
  border-color: var(--warning-color);
  font-weight: 600;
}

.calendar-day-number {
  font-size: 0.9rem;
  margin-bottom: 5px;
}

.calendar-day-events {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.calendar-day.selected .calendar-day-events {
  color: white;
}

.event-dot {
  width: 6px;
  height: 6px;
  background: var(--primary-color);
  border-radius: 50%;
  display: inline-block;
  margin-right: 2px;
}

.calendar-events-list {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.calendar-events-list h3 {
  margin-bottom: 15px;
  color: var(--text-color);
}

/* Tabla de personas */
.personas-table {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.personas-table table {
  width: 100%;
  border-collapse: collapse;
}

.personas-table th,
.personas-table td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.personas-table th {
  background: var(--bg-color);
  font-weight: 600;
  color: var(--text-color);
}

.personas-table tr:hover {
  background: var(--bg-color);
}

.status-badge {
  padding: 4px 10px;
  border-radius: 16px;
  font-size: 0.85rem;
  font-weight: 500;
}

.status-badge.active {
  background: #e8f5e9;
  color: #2e7d32;
}

.status-badge.inactive {
  background: #ffebee;
  color: #c62828;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 10px;
  }

  .header h1 {
    font-size: 1.8rem;
  }

  .nav-tabs {
    flex-wrap: wrap;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .actividades-grid {
    grid-template-columns: 1fr;
  }

  .form-actividad {
    padding: 20px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .calendar-grid {
    gap: 5px;
  }

  .calendar-day {
    min-height: 60px;
    padding: 5px;
  }

  .participantes-container {
    grid-template-columns: 1fr;
  }
}
/* Botón Success */
.btn-success {
  background: var(--secondary-color);
  color: white;
}

.btn-success:hover {
  background: #2d8e47;
  box-shadow: var(--shadow-hover);
}
/* Mejoras para calendario híbrido */
.calendar-day {
  display: flex;
  flex-direction: column;
  padding: 5px;
  min-height: 100px;
  overflow: hidden;
}

.calendar-day-number {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 5px;
  text-align: right;
  padding-right: 5px;
}

.calendar-day-content {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.calendar-mini-event {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  padding: 3px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 4px;
  border-left: 3px solid;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  transition: all 0.2s ease;
}

.calendar-mini-event:hover {
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  z-index: 10;
}

.calendar-mini-event.activa {
  border-left-color: var(--secondary-color);
}

.calendar-mini-event.completada {
  border-left-color: #2196f3;
}

.calendar-mini-event.cancelada {
  border-left-color: var(--danger-color);
  opacity: 0.7;
}

/* Días de continuación de eventos multidia */
.calendar-mini-event.event-continuation {
  border-left: none;
  padding-left: 8px;
}

.calendar-mini-event.event-continuation.activa {
  background: rgba(52, 168, 83, 0.15);
}

.calendar-mini-event.event-continuation.completada {
  background: rgba(33, 150, 243, 0.15);
}

.calendar-mini-event.event-continuation.cancelada {
  background: rgba(244, 67, 54, 0.12);
  opacity: 0.65;
}

.event-cont-arrow {
  font-size: 0.85rem;
  flex-shrink: 0;
  opacity: 0.55;
  margin-right: 2px;
}

/* Último día de evento multidia — mismo aspecto que el primero + borde derecho */
.calendar-mini-event.event-end {
  border-right: 3px solid;
}

.calendar-mini-event.event-end.activa {
  border-right-color: var(--secondary-color);
}

.calendar-mini-event.event-end.completada {
  border-right-color: #2196f3;
}

.calendar-mini-event.event-end.cancelada {
  border-right-color: var(--danger-color);
}

.event-status-badge {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.event-status-badge.activa {
  background: var(--secondary-color);
}

.event-status-badge.completada {
  background: #2196f3;
}

.event-status-badge.cancelada {
  background: var(--danger-color);
}

.event-time {
  font-weight: 600;
  color: var(--text-color);
  flex-shrink: 0;
}

.event-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-secondary);
}

.calendar-more-events {
  font-size: 0.65rem;
  color: var(--primary-color);
  font-weight: 600;
  text-align: center;
  padding: 2px;
  background: rgba(66, 133, 244, 0.1);
  border-radius: 3px;
  cursor: pointer;
}

.calendar-more-events:hover {
  background: rgba(66, 133, 244, 0.2);
}

.calendar-day.selected .calendar-mini-event {
  background: rgba(255, 255, 255, 0.95);
}

.calendar-day.selected .event-time,
.calendar-day.selected .event-title {
  color: var(--text-color);
}

.calendar-day.today .calendar-day-number {
  background: var(--warning-color);
  color: white;
  padding: 4px 8px;
  border-radius: 50%;
  display: inline-block;
}

/* Scrollbar personalizado para días con muchas actividades */
.calendar-day-content::-webkit-scrollbar {
  width: 3px;
}

.calendar-day-content::-webkit-scrollbar-track {
  background: transparent;
}

.calendar-day-content::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 3px;
}

.calendar-day-content::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.3);
}

/* ─── Toggle de vista Mes / Año ───────────────────────────────────────── */
.calendar-vista-toggle {
  display: flex;
  gap: 2px;
  background: var(--border-color);
  border-radius: 6px;
  padding: 2px;
}

.calendar-vista-toggle .btn {
  border-radius: 4px;
  padding: 4px 12px;
  font-size: 0.8rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.calendar-vista-toggle .btn.active {
  background: var(--card-bg);
  color: var(--primary-color);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* ─── Calendario Anual ────────────────────────────────────────────────── */
.calendar-anual-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 8px 0;
}

.calendar-mes-mini {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 12px 10px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.07);
  border: 1px solid var(--border-color);
}

.calendar-mes-mini-header {
  text-align: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--primary-color);
  margin-bottom: 8px;
  text-transform: capitalize;
}

.calendar-mes-mini-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
}

.mini-header-dia {
  text-align: center;
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 2px 0 4px;
}

.calendar-dia-mini {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  font-size: 0.62rem;
  color: var(--text-color);
  cursor: pointer;
  border-radius: 3px;
  padding: 2px 1px 1px;
  line-height: 1.2;
  transition: background 0.15s ease;
}

.calendar-dia-mini:hover {
  background: rgba(0, 0, 0, 0.06);
}

.calendar-dia-mini.hoy {
  background: var(--primary-color);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
}

.calendar-dia-mini.hoy:hover {
  background: var(--primary-dark, var(--primary-color));
}

.calendar-dia-mini.vacio {
  cursor: default;
}

.calendar-dia-mini.con-actividad {
  background: #d0d0d0;
  border-radius: 3px;
}

.calendar-dia-mini.con-actividad:hover {
  background: #b8b8b8;
}

.dia-dots {
  display: flex;
  gap: 1px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1px;
}

.dia-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Leyenda tipos — calendario anual */
.calendario-leyenda {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  background: var(--card-bg);
  border-radius: 8px;
  margin-top: 16px;
  font-size: 0.82rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
}

.leyenda-titulo {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.8rem;
  margin-right: 4px;
}

.leyenda-item {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--text-color);
}

.leyenda-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Resumen Dashboard */
.dashboard-resumen {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.resumen-card {
  flex: 1;
  min-width: 200px;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 14px 18px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.resumen-card h4 {
  margin: 0 0 10px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
}

.resumen-items {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.resumen-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-color);
}

.resumen-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Responsive para calendario */
@media (max-width: 768px) {
  .calendar-day {
    min-height: 80px;
  }
  
  .calendar-mini-event {
    font-size: 0.65rem;
    padding: 2px;
  }
  
  .event-time {
    font-size: 0.6rem;
  }
  
  .calendar-day-number {
    font-size: 0.8rem;
  }

  .calendar-anual-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .calendar-anual-grid {
    grid-template-columns: 1fr;
  }
}