:root {
  --primary-color: #2196F3;
  --secondary-color: #4CAF50;
  --warning-color: #FFC107;
  --danger-color: #F44336;
  --purple-color: #9C27B0;
  --background-color: #f5f5f5;
  --surface-color: #ffffff;
  --text-primary: #333333;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --shadow: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-hover: 0 4px 8px rgba(0,0,0,0.15);
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  --background-color: #121212;
  --surface-color: #1e1e1e;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --border-color: #333333;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--background-color);
  color: var(--text-primary);
  line-height: 1.6;
  padding-bottom: 80px;
  transition: var(--transition);
}

/* Header */
.app-header {
  background: linear-gradient(135deg, var(--primary-color), var(--purple-color));
  color: white;
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

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

.header-content h1 {
  font-size: 1.5rem;
  font-weight: 600;
}

.language-toggle {
  display: flex;
  gap: 0.5rem;
}

.lang-btn {
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.3);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
}

.lang-btn.active,
.lang-btn:hover {
  background: rgba(255,255,255,0.3);
  border-color: rgba(255,255,255,0.5);
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

.content-section {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
}

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

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

/* Cards */
.welcome-card,
.stat-card,
.family-stat-card {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
  transition: var(--transition);
}

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

.welcome-card h2 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  font-size: 1.5rem;
}

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

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  text-align: center;
  padding: 1.5rem;
}

.stat-card i {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-card h3 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--primary-color);
}

/* Quick Actions */
.quick-actions {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

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

.action-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  flex: 1;
  min-width: 150px;
  justify-content: center;
}

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

.action-btn.primary:hover {
  background: #45a049;
  transform: translateY(-2px);
}

.action-btn.secondary {
  background: var(--warning-color);
  color: white;
}

.action-btn.secondary:hover {
  background: #e6ac00;
  transform: translateY(-2px);
}

/* Progress Section */
.progress-section {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

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

.progress-bar {
  width: 100%;
  height: 20px;
  background: var(--border-color);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
  border-radius: 10px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Timer Section */
.timer-container {
  max-width: 400px;
  margin: 0 auto;
}

.timer-display {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  text-align: center;
  margin-bottom: 2rem;
}

.timer-display h2 {
  color: var(--text-secondary);
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.timer-value {
  font-size: 3rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-family: 'Courier New', monospace;
}

.timer-status {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.timer-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.timer-btn {
  width: 60px;
  height: 60px;
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.timer-btn.start {
  background: var(--secondary-color);
  color: white;
}

.timer-btn.pause {
  background: var(--warning-color);
  color: white;
}

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

.timer-btn:hover:not(:disabled) {
  transform: scale(1.1);
}

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

.break-reminder {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  text-align: center;
}

.break-reminder h3 {
  color: var(--warning-color);
  margin-bottom: 0.5rem;
}

.break-reminder p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.break-countdown {
  padding: 1rem;
  background: var(--warning-color);
  color: white;
  border-radius: var(--border-radius);
  font-weight: bold;
}

.break-countdown.hidden {
  display: none;
}

#break-timer {
  font-size: 1.2rem;
  margin-left: 0.5rem;
}

/* Goals Section */
.goals-header,
.family-header,
.settings-header,
.faq-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.goals-header h2,
.family-header h2,
.settings-header h2,
.faq-header h2 {
  color: var(--text-primary);
  font-size: 1.8rem;
}

.add-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.8rem 1.2rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
}

.add-btn:hover {
  background: #1976D2;
  transform: translateY(-2px);
}

.goals-list,
.family-members {
  display: grid;
  gap: 1rem;
}

.goal-card,
.member-card {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

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

.goal-title,
.member-name {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--text-primary);
}

.goal-type,
.member-age {
  background: var(--primary-color);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 12px;
  font-size: 0.8rem;
}

.goal-progress,
.member-usage {
  margin-bottom: 1rem;
}

.goal-progress-bar,
.member-progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.goal-progress-fill,
.member-progress-fill {
  height: 100%;
  background: var(--secondary-color);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.goal-actions,
.member-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

.btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

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

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

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

.btn:hover {
  transform: translateY(-1px);
  opacity: 0.9;
}

/* Family Stats */
.family-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

/* Settings */
.settings-groups {
  display: grid;
  gap: 2rem;
}

.settings-group {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.settings-group h3 {
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  font-size: 1.3rem;
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

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

.setting-item label {
  color: var(--text-primary);
  font-weight: 500;
}

.toggle-switch {
  position: relative;
  appearance: none;
  width: 50px;
  height: 24px;
  background: var(--border-color);
  border-radius: 12px;
  outline: none;
  cursor: pointer;
  transition: var(--transition);
}

.toggle-switch:checked {
  background: var(--primary-color);
}

.toggle-switch::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: var(--transition);
}

.toggle-switch:checked::before {
  transform: translateX(26px);
}

.setting-item input[type="number"] {
  width: 80px;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--surface-color);
  color: var(--text-primary);
}

.setting-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* FAQ Section */
.faq-container {
  display: grid;
  gap: 1rem;
}

.faq-item {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 1.5rem;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: var(--transition);
}

.faq-question:hover {
  background: var(--background-color);
}

.faq-icon {
  font-size: 1.5rem;
  color: var(--primary-color);
  transition: transform 0.3s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 1.5rem 1.5rem;
  color: var(--text-secondary);
  line-height: 1.6;
  animation: slideDown 0.3s ease-out;
}

.faq-answer[hidden] {
  display: none;
}

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

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

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

.modal-header h3 {
  color: var(--text-primary);
  font-size: 1.3rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

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

.modal form {
  padding: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

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

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--surface-color);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.form-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-color);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  padding: 0.5rem 0;
  z-index: 100;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
}

/* Garantir que os ícones sejam sempre visíveis */
.bottom-nav .fas,
.bottom-nav .fa {
  display: inline-block !important;
  visibility: visible !important;
  opacity: 1 !important;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--text-secondary);
  transition: var(--transition);
  padding: 0.5rem;
  border-radius: 8px;
  min-width: 60px;
  cursor: pointer;
  user-select: none;
}

.nav-item i {
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
  display: inline-block;
  width: 1.2rem;
  height: 1.2rem;
  text-align: center;
  line-height: 1.2rem;
}

/* Fallback para ícones caso Font Awesome não carregue */
.nav-item i:before {
  content: attr(data-fallback);
  font-family: Arial, sans-serif;
  font-weight: bold;
}

.nav-item span {
  font-size: 0.7rem;
  font-weight: 500;
}

.nav-item.active {
  color: var(--primary-color);
  background: rgba(33, 150, 243, 0.1);
}

.nav-item:hover {
  color: var(--primary-color);
  background: rgba(33, 150, 243, 0.05);
}

/* Footer */
.app-footer {
  text-align: center;
  padding: 2rem 1rem 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.app-footer a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

.app-footer a:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}

/* Utilities */
.hidden {
  display: none !important;
}

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

.text-success {
  color: var(--secondary-color);
}

.text-warning {
  color: var(--warning-color);
}

.text-danger {
  color: var(--danger-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content h1 {
    font-size: 1.2rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .action-buttons {
    flex-direction: column;
  }
  
  .action-btn {
    min-width: auto;
  }
  
  .timer-value {
    font-size: 2.5rem;
  }
  
  .goals-header,
  .family-header,
  .settings-header,
  .faq-header {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .setting-actions {
    flex-direction: column;
  }
  
  .nav-item span {
    font-size: 0.65rem;
  }
  
  .nav-item i {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: 0.5rem;
  }
  
  .welcome-card,
  .stat-card,
  .family-stat-card,
  .quick-actions,
  .progress-section,
  .timer-display,
  .break-reminder,
  .goal-card,
  .member-card,
  .settings-group,
  .faq-item {
    padding: 1rem;
  }
  
  .timer-value {
    font-size: 2rem;
  }
  
  .timer-btn {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
  }
  
  .nav-item {
    min-width: 50px;
    padding: 0.4rem;
  }
  
  .nav-item i {
    font-size: 0.9rem;
  }
  
  .nav-item span {
    font-size: 0.6rem;
  }
}

/* Print Styles */
@media print {
  .app-header,
  .bottom-nav,
  .app-footer,
  .modal,
  .action-buttons,
  .timer-controls,
  .add-btn,
  .btn,
  .setting-actions {
    display: none !important;
  }
  
  .main-content {
    padding: 0;
    max-width: none;
  }
  
  .content-section {
    display: block !important;
    page-break-inside: avoid;
    margin-bottom: 2rem;
  }
}