:root {
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-sidebar: #0f172a;
  --text-sidebar: #94a3b8;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --accent-red: #ef4444;
  --border-color: #e2e8f0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --transition: all 0.2s ease-in-out;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    sans-serif;
}

body {
  background-color: var(--bg-app);
  color: var(--text-primary);
  min-height: 100vh;
}

.app-container {
  display: flex;
  min-height: 100vh;
}

/* ================= SIDEBAR ================= */
.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  margin-bottom: 32px;
  padding: 0 8px;
}

.brand-icon {
  font-size: 1.8rem;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--text-sidebar);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
}

.nav-btn:hover {
  background-color: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.nav-btn.active {
  background-color: var(--primary);
  color: #fff;
}

/* ================= BARRA DE PROGRESO GLOBAL ================= */
.global-progress-card {
  background: rgba(255, 255, 255, 0.05);
  padding: 16px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}

.progress-title-row {
  display: flex;
  justify-content: space-between;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.progress-bar-bg {
  background-color: #e2e8f0;
  height: 8px;
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}

.global-progress-card .progress-bar-bg {
  background-color: rgba(255, 255, 255, 0.15);
}

.progress-bar-fill {
  background: linear-gradient(90deg, #10b981, #06b6d4);
  height: 100%;
  border-radius: 999px;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-subtext {
  font-size: 0.75rem;
  margin-top: 6px;
  color: var(--text-sidebar);
}

.sidebar-footer .btn-text {
  background: none;
  border: none;
  color: var(--text-sidebar);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 8px;
  width: 100%;
  text-align: left;
}

.sidebar-footer .btn-text:hover {
  color: #fff;
}

/* ================= CONTENIDO PRINCIPAL ================= */
.main-content {
  flex-grow: 1;
  padding: 32px 40px;
  overflow-y: auto;
}

.view-section {
  display: none;
}

.view-section.active {
  display: block;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.section-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.header-actions {
  display: flex;
  gap: 12px;
}

/* Botones */
.btn {
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

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

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

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

.btn-secondary:hover {
  background-color: #f1f5f9;
}

.btn-danger {
  background-color: #fee2e2;
  color: #dc2626;
  border: 1px solid #fca5a5;
}

.btn-danger:hover {
  background-color: #fecaca;
  color: #b91c1c;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-icon {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: bold;
}

/* ================= KANBAN ================= */
.project-selector-banner {
  background: var(--bg-surface);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  border: 1px solid var(--border-color);
}

.selector-group {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.selector-group select {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-app);
}

.active-project-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 340px;
}

.active-project-progress .progress-bar-bg {
  flex-grow: 1;
}

.kanban-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: start;
}

.kanban-column {
  background-color: #f1f5f9;
  border-radius: var(--radius-md);
  padding: 16px;
  min-height: 520px;
}

.column-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.column-header h3 {
  font-size: 1rem;
  font-weight: 600;
  flex-grow: 1;
}

.column-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-todo {
  background-color: var(--accent-orange);
}
.dot-progress {
  background-color: #3b82f6;
}
.dot-done {
  background-color: var(--accent-green);
}

.badge {
  background: #e2e8f0;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.kanban-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 400px;
}

.kanban-card {
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  padding: 14px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  cursor: grab;
  transition: var(--transition);
}

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

.card-project-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  color: #fff;
  margin-bottom: 8px;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.priority-tag {
  text-transform: capitalize;
  font-weight: 600;
}

.priority-alta {
  color: var(--accent-red);
}
.priority-media {
  color: var(--accent-orange);
}
.priority-baja {
  color: var(--accent-green);
}

.card-actions {
  display: flex;
  gap: 6px;
}

.card-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  opacity: 0.6;
}

.card-btn:hover {
  opacity: 1;
}

/* ================= CALENDARIO ================= */
.calendar-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.calendar-grid-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  text-align: center;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}

.calendar-day {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  min-height: 105px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: var(--transition);
}

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

.calendar-day.other-month {
  opacity: 0.35;
  background-color: #f8fafc;
}

.calendar-day.today {
  border: 2px solid var(--primary);
}

.day-number {
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.event-pill {
  font-size: 0.7rem;
  padding: 3px 6px;
  border-radius: 4px;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
  color: #fff;
}

.event-examen {
  background-color: var(--accent-red);
}
.event-proyecto {
  background-color: var(--primary);
}
.event-otro {
  background-color: #64748b;
}

/* ================= HORARIO ================= */
.timetable-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.timetable-grid {
  display: grid;
  grid-template-columns: 80px repeat(5, 1fr);
  gap: 12px;
}

.time-col-header,
.day-col-header {
  font-weight: 600;
  text-align: center;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
  color: var(--text-secondary);
}

.time-slot-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.day-column-slots {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.class-card {
  border-radius: var(--radius-sm);
  padding: 10px;
  color: #fff;
  box-shadow: var(--shadow);
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
}

.class-card .delete-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  background: rgba(0, 0, 0, 0.2);
  border: none;
  color: #fff;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

/* ================= MODALES ================= */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(3px);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal.open {
  display: flex;
}

.modal-content {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 28px;
  width: 100%;
  max-width: 460px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-content h3 {
  margin-bottom: 20px;
  font-size: 1.25rem;
}

.modal-subtitle {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.form-group {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
}

.form-group input,
.form-group select {
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.modal-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

.modal-buttons-compact {
  margin-top: 14px;
  margin-bottom: 6px;
}

/* Lista de gestión de proyectos en modal */
.existing-projects-section {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
}

.project-list-modal {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 190px;
  overflow-y: auto;
  padding-right: 4px;
}

.project-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.project-item-row:hover {
  border-color: #cbd5e1;
}

.project-item-info {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.project-color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.project-item-name {
  font-weight: 500;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-item-tasks {
  font-size: 0.75rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.project-delete-btn {
  background: transparent;
  border: none;
  color: #ef4444;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
  flex-shrink: 0;
}

.project-delete-btn:hover {
  background-color: #fee2e2;
  color: #b91c1c;
}

.empty-projects-msg {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
  text-align: center;
  padding: 12px;
}

/* ================= MODAL DETALLES DEL DÍA ================= */
.day-modal-content {
  max-width: 520px;
}

.day-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.day-modal-header h3 {
  margin-bottom: 4px;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.btn-close-icon {
  background: transparent;
  border: none;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.btn-close-icon:hover {
  background-color: var(--bg-app);
  color: var(--text-primary);
}

.day-section {
  margin-bottom: 20px;
}

.day-section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.day-classes-list,
.day-events-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 160px;
  overflow-y: auto;
  padding-right: 4px;
}

.day-class-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.day-class-card:hover {
  border-color: #cbd5e1;
}

.day-class-main {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.day-class-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.day-class-room {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.day-class-time {
  font-size: 0.8rem;
  font-weight: 600;
  background: #e0e7ff;
  color: #3730a3;
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.day-event-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.day-event-card:hover {
  border-color: #cbd5e1;
}

.day-event-info {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.day-event-badge {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 4px;
  color: #fff;
  font-weight: 500;
  white-space: nowrap;
}

.day-event-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.event-delete-btn {
  background: transparent;
  border: none;
  color: var(--accent-red);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
  flex-shrink: 0;
}

.event-delete-btn:hover {
  background-color: #fee2e2;
  color: #b91c1c;
}

.day-add-event-section {
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 12px;
}

.day-add-event-section .day-section-title {
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.form-row-quick {
  display: flex;
  gap: 8px;
  align-items: center;
}

.form-row-quick input {
  flex: 2;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  background: var(--bg-surface);
}

.form-row-quick select {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  background: var(--bg-surface);
}

.day-empty-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
  padding: 8px 0;
}

/* ================= AUTH & CLOUD SYNC ================= */
.btn-block {
  width: 100%;
  justify-content: center;
}

.user-profile-card {
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.auth-logged-out-view {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cloud-sync-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-sidebar);
}

.sync-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.sync-dot.online {
  background-color: #10b981;
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.6);
}

.sync-dot.syncing {
  background-color: #f59e0b;
  animation: pulse 1s infinite alternate;
}

.sync-dot.offline {
  background-color: #64748b;
}

.sync-dot.error {
  background-color: #ef4444;
}

@keyframes pulse {
  from {
    opacity: 0.4;
  }
  to {
    opacity: 1;
  }
}

.auth-logged-in-view {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.user-info-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
  overflow: hidden;
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.user-details {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.user-name {
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-email {
  color: var(--text-sidebar);
  font-size: 0.72rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-logout {
  padding: 4px 0 !important;
  font-size: 0.78rem !important;
  color: #f87171 !important;
}

.btn-logout:hover {
  color: #fca5a5 !important;
}

/* Modal Auth */
.auth-modal-content {
  max-width: 420px;
}

.auth-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.btn-google {
  background-color: #ffffff;
  color: #1f2937;
  border: 1px solid #d1d5db;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 16px;
  transition: var(--transition);
}

.btn-google:hover {
  background-color: #f9fafb;
  border-color: #9ca3af;
  box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
}

.google-icon {
  flex-shrink: 0;
}

.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin: 4px 0;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  border-bottom: 1px solid var(--border-color);
}

.auth-divider span {
  padding: 0 10px;
}

.auth-error {
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.btn-text-link {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: underline;
}

.btn-text-link:hover {
  color: var(--primary-hover);
}