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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #f8fafc;
  color: #334155;
  line-height: 1.6;
}

/* Pages */
.page {
  display: none;
}

.page.active {
  display: block;
}

/* Login Page */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-card h1 {
  font-size: 2rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 8px;
}

.login-card p {
  color: #64748b;
  margin-bottom: 32px;
}

/* Header */
.header {
  background: white;
  border-bottom: 1px solid #e2e8f0;
  padding: 16px 0;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1e293b;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px;
}

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

.content-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #1e293b;
}

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

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  background: #f1f5f9;
  padding: 4px;
  border-radius: 8px;
}

.tab-btn {
  flex: 1;
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: #64748b;
  font-weight: 500;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
}

.tab-btn.active {
  background: white;
  color: #1e293b;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.tab-btn:hover:not(.active) {
  color: #334155;
}

.tab-content {
  display: none;
}

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

/* Filters */
.filters {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
}

.filters select {
  padding: 8px 12px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  background: white;
  font-size: 14px;
}

/* Categories Section */
.categories-section {
  margin-bottom: 32px;
}

.categories-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: #1e293b;
}

.categories-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.category-item {
  background: white;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.category-actions {
  display: flex;
  gap: 4px;
}

.category-actions button {
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
  border-radius: 4px;
  font-size: 12px;
}

.category-actions button:hover {
  background: #f1f5f9;
}

/* Tasks Section */
.tasks-list {
  display: grid;
  gap: 16px;
}

.task-item {
  background: white;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  transition: all 0.2s;
}

.task-item:hover {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.task-item.completed {
  opacity: 0.7;
}

.task-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.task-title {
  font-weight: 600;
  font-size: 1.125rem;
  color: #1e293b;
}

.task-title.completed {
  text-decoration: line-through;
}

.task-actions {
  display: flex;
  gap: 8px;
}

.task-actions button {
  background: none;
  border: none;
  padding: 4px 8px;
  cursor: pointer;
  border-radius: 4px;
  font-size: 12px;
}

.task-actions button:hover {
  background: #f1f5f9;
}

.task-description {
  color: #64748b;
  margin-bottom: 12px;
}

.task-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: #64748b;
}

.task-category {
  background: #f1f5f9;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.task-status {
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.task-status.pendente {
  background: #fef3c7;
  color: #92400e;
}

.task-status.concluida {
  background: #d1fae5;
  color: #065f46;
}

/* Forms */
.input-group {
  margin-bottom: 16px;
}

.input-group label {
  display: block;
  margin-bottom: 4px;
  font-weight: 500;
  color: #374151;
}

.input-group input,
.input-group textarea,
.input-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.2s;
}

.input-group input:focus,
.input-group textarea:focus,
.input-group select:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Buttons */
.btn-primary {
  background: #3b82f6;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-primary:hover {
  background: #2563eb;
}

.btn-primary:disabled {
  background: #93c5fd;
  cursor: not-allowed;
}

.btn-secondary {
  background: #f8fafc;
  color: #64748b;
  border: 1px solid #e2e8f0;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-content {
  background: white;
  border-radius: 12px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 24px 0;
  margin-bottom: 24px;
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1e293b;
}

.close-btn {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: #64748b;
  padding: 4px;
}

.close-btn:hover {
  color: #374151;
}

.modal form {
  padding: 0 24px 24px;
}

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

/* Demo Info */
.demo-info {
  margin-top: 24px;
  padding: 16px;
  background: #f8fafc;
  border-radius: 6px;
  font-size: 14px;
  text-align: left;
}

.demo-info p {
  margin-bottom: 4px;
}

/* Loading overlay styles */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

.loading-overlay.active {
  display: flex;
}

.loading-spinner {
  text-align: center;
  background: white;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Added loader styles for index.html */
.loader-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f8fafc;
}

.loader-content {
  text-align: center;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid #e2e8f0;
  border-top-color: #3b82f6;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

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

.loader-content p,
.loading-spinner p {
  color: #64748b;
  font-size: 16px;
  font-weight: 500;
  margin-top: 16px;
}

/* Responsive */
@media (max-width: 768px) {
  .content-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .actions {
    width: 100%;
    justify-content: flex-end;
  }

  .filters {
    flex-direction: column;
  }

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

  .modal-actions {
    flex-direction: column;
  }
}