/* CSS Variables */
:root {
  /* Colors */
  --primary-color: #0d6efd;
  --primary-hover: #0b5ed7;
  --secondary-color: #6c757d;
  --success-color: #198754;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #0dcaf0;
  --light-color: #f8f9fa;
  --dark-color: #212529;
  
  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  
  /* Text Colors */
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;
  --text-light: #ffffff;
  
  /* Borders */
  --border-color: #dee2e6;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Spacing */
  --sidebar-width: 280px;
  --header-height: 70px;
  
  /* Animations */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

/* Dark Theme */
[data-bs-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #404040;
  --bg-sidebar: #1a1a1a;
  --bg-card: #2d2d2d;
  
  --text-primary: #ffffff;
  --text-secondary: #adb5bd;
  --text-muted: #6c757d;
  
  --border-color: #404040;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: var(--transition);
  overflow-x: hidden;
}

/* ==========================================================================
   Login Page Styles
   ========================================================================== */

.login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-container {
  position: relative;
  width: 100%;
  max-width: 450px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.login-card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 2.5rem;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  width: 100%;
  max-width: 450px;
}

.logo-container {
  width: 80px;
  height: 80px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.logo-container i {
  font-size: 2.5rem;
  color: white;
}

.app-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.app-subtitle {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.auth-tabs .nav-pills .nav-link {
  border-radius: var(--border-radius-sm);
  padding: 0.75rem 1.5rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}

.auth-tabs .nav-pills .nav-link.active {
  background-color: var(--primary-color);
  color: white;
}

.auth-form {
  margin-top: 1.5rem;
}

.form-floating > label {
  color: var(--text-secondary);
  font-weight: 500;
}

.form-control {
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.btn {
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  border: none;
}

.theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
}

.theme-toggle .btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  backdrop-filter: blur(10px);
}

.forgot-password {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
}

.forgot-password:hover {
  color: var(--primary-color);
}

/* ==========================================================================
   Dashboard Page Styles
   ========================================================================== */

.dashboard-page {
  background-color: var(--bg-secondary);
}

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

/* ==========================================================================
   Sidebar Styles
   ========================================================================== */

.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 1000;
  transform: translateX(-100%);
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
}

.sidebar.show {
  transform: translateX(0);
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo i {
  font-size: 1.5rem;
  color: var(--primary-color);
}

.sidebar-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
}

.sidebar-close:hover {
  background-color: var(--bg-tertiary);
}

.sidebar-nav {
  padding: 1rem;
}

.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  margin-bottom: 0.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
  font-weight: 500;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.sidebar-nav .nav-link:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.sidebar-nav .nav-link.active {
  background-color: var(--primary-color);
  color: white;
}

.sidebar-nav .nav-link i {
  font-size: 1.1rem;
  width: 20px;
}

.sidebar-footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-sidebar);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.avatar i {
  font-size: 1.5rem;
}

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

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

.user-email {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* ==========================================================================
   Main Content Styles
   ========================================================================== */

.main-content {
  flex: 1;
  margin-left: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: var(--transition);
}

.header {
  height: var(--header-height);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
}

.sidebar-toggle:hover {
  background-color: var(--bg-tertiary);
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.header-right {
  display: flex;
  align-items: center;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-actions .btn {
  position: relative;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
}

.notification-badge {
  position: absolute;
  top: -5px;
  right: -5px;
  background-color: var(--danger-color);
  color: white;
  border-radius: 50%;
  width: 18px;
  height: 18px;
  font-size: 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.content-section {
  display: none;
}

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

/* ==========================================================================
   Dashboard Styles
   ========================================================================== */

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.welcome-message h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.welcome-message p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 1rem;
}

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

.stat-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
}

.stat-card.total .stat-icon {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
}

.stat-card.completed .stat-icon {
  background: linear-gradient(135deg, var(--success-color), #0f5132);
}

.stat-card.pending .stat-icon {
  background: linear-gradient(135deg, var(--warning-color), #b45309);
}

.stat-card.overdue .stat-icon {
  background: linear-gradient(135deg, var(--danger-color), #b02a37);
}

.stat-content h3 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.stat-content p {
  color: var(--text-secondary);
  margin: 0;
  font-weight: 500;
}

.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.chart-card {
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.chart-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.chart-header h4 {
  margin: 0;
  color: var(--text-primary);
  font-weight: 600;
}

.chart-content {
  padding: 1.5rem;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.recent-tasks {
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.section-header h4 {
  margin: 0;
  color: var(--text-primary);
  font-weight: 600;
}

.task-list {
  max-height: 400px;
  overflow-y: auto;
}

.task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.task-item:last-child {
  border-bottom: none;
}

.task-item:hover {
  background-color: var(--bg-secondary);
}

.task-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.priority-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.priority-indicator.alta {
  background-color: var(--danger-color);
}

.priority-indicator.media {
  background-color: var(--warning-color);
}

.priority-indicator.baixa {
  background-color: var(--success-color);
}

.task-details h6 {
  margin: 0 0 0.25rem 0;
  color: var(--text-primary);
  font-weight: 600;
}

.task-details p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: capitalize;
}

.status-badge.pendente {
  background-color: rgba(13, 110, 253, 0.1);
  color: var(--primary-color);
}

.status-badge.em_andamento {
  background-color: rgba(255, 193, 7, 0.1);
  color: var(--warning-color);
}

.status-badge.concluida {
  background-color: rgba(25, 135, 84, 0.1);
  color: var(--success-color);
}

.status-badge.cancelada {
  background-color: rgba(108, 117, 125, 0.1);
  color: var(--secondary-color);
}

/* ==========================================================================
   Tasks Section Styles
   ========================================================================== */

.filters-card {
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
  overflow: hidden;
}

.filters-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.filters-header h5 {
  margin: 0;
  color: var(--text-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filters-content {
  padding: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.filter-group {
  display: flex;
  flex-direction: column;
}

.filter-group label {
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.tasks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.task-card {
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

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

.task-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--secondary-color);
}

.task-card.priority-alta::before {
  background-color: var(--danger-color);
}

.task-card.priority-media::before {
  background-color: var(--warning-color);
}

.task-card.priority-baixa::before {
  background-color: var(--success-color);
}

.task-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.task-card-header h5 {
  margin: 0;
  color: var(--text-primary);
  font-weight: 600;
  flex: 1;
}

.task-actions {
  display: flex;
  gap: 0.5rem;
  opacity: 0.7;
  transition: var(--transition);
}

.task-card:hover .task-actions {
  opacity: 1;
}

.task-actions .btn {
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
}

.task-card-body {
  margin-bottom: 1rem;
}

.task-card-body p {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.9rem;
}

.task-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.task-badges {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.task-badges .badge {
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
}

.task-date {
  color: var(--text-secondary);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.task-date.overdue {
  color: var(--danger-color);
  font-weight: 500;
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
}

.empty-icon {
  font-size: 4rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.empty-state h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.placeholder-section {
  text-align: center;
  padding: 4rem 2rem;
}

.placeholder-icon {
  font-size: 4rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.placeholder-section h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.placeholder-section p {
  color: var(--text-secondary);
}

/* ==========================================================================
   Modal Styles
   ========================================================================== */

.modal-content {
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  background-color: var(--bg-card);
}

.modal-header {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.modal-title {
  color: var(--text-primary);
  font-weight: 600;
}

.modal-body {
  background-color: var(--bg-card);
}

.modal-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

/* ==========================================================================
   Sidebar Overlay
   ========================================================================== */

.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
  display: none;
  opacity: 0;
  transition: var(--transition);
}

.sidebar-overlay.show {
  display: block;
  opacity: 1;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (min-width: 992px) {
  .sidebar {
    position: fixed;
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: var(--sidebar-width);
  }
  
  .sidebar-toggle {
    display: none;
  }
}

@media (max-width: 991px) {
  .sidebar {
    width: 280px;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .content {
    padding: 1rem;
  }
  
  .dashboard-header {
    flex-direction: column;
    gap: 1rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
  }
  
  .charts-grid {
    grid-template-columns: 1fr;
  }
  
  .tasks-grid {
    grid-template-columns: 1fr;
  }
  
  .filters-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .login-card {
    padding: 1.5rem;
  }
  
  .content {
    padding: 1rem;
  }
  
  .header {
    padding: 0 1rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .task-card-header {
    flex-direction: column;
    gap: 1rem;
  }
  
  .task-actions {
    align-self: flex-start;
  }
  
  .header-actions .btn span {
    display: none;
  }
  
  .section-header {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

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

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

.loading {
  opacity: 0.6;
  pointer-events: none;
}

.text-truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}