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

:root {
  --primary-color: #5B9FED;
  --secondary-color: #8B92A0;
  --success-color: #4CAF50;
  --danger-color: #F44336;
  --bg-color: #0F1419;
  --card-bg: #1A1F2E;
  --text-primary: #E8EAED;
  --text-secondary: #9AA0A6;
  --border-color: #2D3748;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.7);
  --input-bg: #252B3B;
  --hover-bg: #252B3B;
}

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

.screen {
  display: none;
}

.screen.active {
  display: block;
}

/* Auth Screen */
.auth-container {
  max-width: 400px;
  margin: 100px auto;
  padding: 40px;
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.auth-container h1 {
  text-align: center;
  margin-bottom: 30px;
  color: var(--primary-color);
}

.auth-form {
  display: block;
  margin-top: 30px;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 15px;
  transition: border-color 0.3s;
  background: var(--input-bg);
  color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  background: var(--input-bg);
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
}

.checkbox-group input[type="checkbox"] {
  width: auto;
}

.btn-primary,
.btn-secondary {
  width: 100%;
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

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

.btn-primary:hover {
  background: #357ABD;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
  background: #5A6268;
}

.error-message {
  margin-top: 15px;
  padding: 10px;
  background: #F8D7DA;
  color: var(--danger-color);
  border-radius: 6px;
  font-size: 14px;
  display: none;
}

.error-message.show {
  display: block;
}

/* Gallery Screen */
.app-header {
  background: var(--card-bg);
  padding: 20px 40px;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.user-info {
  display: flex;
  gap: 8px;
  align-items: center;
}

.user-plan-badge,
.user-liberal-badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
  display: inline-block;
}

.user-plan-badge.basic {
  background: var(--secondary-color);
  color: white;
}

.user-plan-badge.premium {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.user-liberal-badge {
  background: #F59E0B;
  color: white;
}

.header-actions {
  display: flex;
  gap: 15px;
  align-items: center;
}

/* User Profile Dropdown */
.user-profile-dropdown {
  position: relative;
}

.profile-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  transition: all 0.3s;
  color: var(--text-primary);
}

.profile-trigger:hover {
  background: var(--hover-bg);
  border-color: var(--primary-color);
}

.profile-icon {
  width: 24px;
  height: 24px;
}

.chevron-icon {
  width: 16px;
  height: 16px;
  transition: transform 0.3s;
}

.profile-trigger.active .chevron-icon {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: var(--shadow-hover);
  min-width: 240px;
  z-index: 1000;
  display: none;
}

.dropdown-menu.show {
  display: block;
}

.dropdown-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
}

.user-name {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-size: 14px;
}

.user-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.dropdown-divider {
  height: 1px;
  background: var(--border-color);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}

.dropdown-item:hover {
  background: var(--hover-bg);
  color: var(--primary-color);
}

.dropdown-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.dropdown-item:last-child {
  border-radius: 0 0 8px 8px;
}

/* Support Modal Styles */
.support-confirmation-content {
  text-align: center;
  max-width: 450px;
}

.support-confirmation-header {
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.success-icon {
  width: 64px;
  height: 64px;
  background: var(--success-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.success-icon svg {
  width: 40px;
  height: 40px;
  color: white;
  stroke-width: 2;
}

.support-confirmation-header h2 {
  margin: 0;
  color: var(--text-primary);
  font-size: 24px;
}

.support-confirmation-body {
  padding: 0 24px 24px;
}

.support-confirmation-body p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
  margin: 8px 0;
}

.support-confirmation-footer {
  padding: 0 24px 24px;
}

.support-confirmation-footer .btn-primary {
  width: 100%;
}

.gallery-container {
  max-width: 1400px;
  margin: 40px auto;
  padding: 0 40px;
}

/* Section Header */
.section-header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.btn-create-ai {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-create-ai:hover {
  background: #357ABD;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-create-ai svg {
  width: 20px;
  height: 20px;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.ai-card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: all 0.3s;
}

.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  background: var(--hover-bg);
  border: 1px solid var(--border-color);
}

.ai-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: linear-to-br, #E0E7EE, #F5F7FA;
}

.ai-card-content {
  padding: 20px;
}

.ai-card-name {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.ai-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.tag {
  background: var(--primary-color);
  color: white;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
}

.ai-card-meta {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}

.ai-card-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Chat Screen */
.chat-header {
  background: var(--card-bg);
  padding: 20px 40px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 20px;
}

.btn-icon {
  background: transparent;
  border: none;
  font-size: 18px;
  cursor: pointer;
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: 6px;
  transition: background 0.3s;
}

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

.chat-ai-info {
  display: flex;
  align-items: center;
  gap: 15px;
}

.chat-ai-info img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
}

.chat-ai-info h2 {
  font-size: 20px;
  margin-bottom: 4px;
}

.chat-ai-info p {
  font-size: 14px;
  color: var(--text-secondary);
}

.chat-messages {
  height: calc(100vh - 200px);
  overflow-y: auto;
  padding: 30px 40px;
  max-width: 900px;
  margin: 0 auto;
}

.message {
  margin-bottom: 20px;
  display: flex;
  gap: 12px;
}

.message.user {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.message.assistant .message-avatar {
  background: var(--secondary-color);
}

.message-content {
  max-width: 70%;
  padding: 12px 16px;
  border-radius: 12px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  line-height: 1.5;
}

.message.user .message-content {
  background: var(--primary-color);
  color: white;
}

/* Indicador de digitação */
.typing-indicator {
  display: inline-block;
  font-size: 20px;
  letter-spacing: 2px;
  animation: blink 1.4s infinite;
  color: var(--text-secondary);
}

@keyframes blink {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* Input e botão desabilitados */
#chat-input:disabled,
#chat-form button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.chat-input-container {
  position: sticky;
  bottom: 0;
  background: var(--card-bg);
  padding: 20px 40px;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  gap: 15px;
  max-width: 900px;
  margin: 0 auto;
  box-sizing: border-box;
  width: 100%;
}

.chat-input-container input {
  flex: 1;
  min-width: 0;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 15px;
  background: var(--input-bg);
  color: var(--text-primary);
  box-sizing: border-box;
}

.chat-input-container input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.chat-input-container button {
  width: 100px;
  padding: 12px 16px;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--card-bg);
  border-radius: 12px;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.modal-header {
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  margin: 0;
}

.close-modal {
  background: transparent;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-secondary);
  line-height: 1;
  padding: 0;
  width: 32px;
  height: 32px;
}

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

.modal-content form {
  padding: 24px;
}

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

.modal-actions button {
  flex: 1;
}

/* Loading */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
}

/* Admin Panel */
.admin-container {
  max-width: 1400px;
  margin: 40px auto;
  padding: 0 40px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.stat-card {
  background: var(--card-bg);
  padding: 24px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: all 0.3s;
}

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

.stat-card h3 {
  font-size: 36px;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.stat-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
}

.admin-actions {
  margin-bottom: 24px;
}

.users-table-container {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.users-table-container h2 {
  margin-bottom: 20px;
  color: var(--text-primary);
}

.users-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 800px;
}

.users-table thead {
  background: var(--input-bg);
}

.users-table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
}

.users-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.users-table tbody tr {
  transition: background 0.2s;
}

.users-table tbody tr:hover {
  background: var(--hover-bg);
}

.plan-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.plan-badge.basic {
  background: var(--secondary-color);
  color: white;
}

.plan-badge.premium {
  background: var(--primary-color);
  color: white;
}

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

.btn-action {
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 500;
}

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

.btn-action.edit:hover {
  background: #357ABD;
}

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

.btn-action.delete:hover {
  background: #d32f2f;
}

.close-user-modal {
  background: transparent;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-secondary);
  line-height: 1;
  padding: 0;
  width: 32px;
  height: 32px;
}

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

/* Menu de Navegação */
.main-nav {
  background: var(--card-bg);
  border-bottom: 2px solid var(--border-color);
  display: flex;
  gap: 0;
  padding: 0 40px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-tab {
  background: transparent;
  border: none;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.3s;
  border-bottom: 3px solid transparent;
  position: relative;
}

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

.nav-tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
  background: var(--hover-bg);
}

.nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-icon svg {
  width: 20px;
  height: 20px;
}

.nav-label {
  font-weight: 600;
}

/* Content Sections */
.content-section {
  display: none;
}

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

/* Seção de Aulas - Estilo Minimalista */
.aulas-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 30px;
}

.aulas-header {
  margin-bottom: 40px;
}

.aulas-header h2 {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.aulas-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.aula-item {
  background: var(--card-bg);
  padding: 24px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.aula-item:hover {
  background: var(--hover-bg);
}

.aula-item-info {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: 1;
}

.aula-numero {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 30px;
}

.aula-numero.material {
  font-size: 20px;
}

.aula-item-text h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  margin: 0 0 4px 0;
}

.aula-item-text p {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
}

.aula-duracao {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.aula-item-material {
  border-top: 2px solid var(--border-color);
}

.aula-item-bonus {
  background: rgba(255, 215, 0, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.3);
}

.aula-item-bonus:hover {
  background: rgba(255, 215, 0, 0.12);
  border-color: rgba(255, 215, 0, 0.5);
}

.aula-numero.bonus {
  color: #FFD700;
  font-size: 20px;
}

/* Responsive */
@media (max-width: 768px) {
  .app-header,
  .chat-header {
    padding: 15px 20px;
  }

  .gallery-container,
  .admin-container {
    padding: 0 20px;
  }

  .ai-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
  }

  .chat-messages {
    padding: 20px;
  }

  .chat-input-container {
    padding: 15px 20px;
    gap: 10px;
  }

  .chat-input-container button {
    width: 90px;
    padding: 12px 12px;
    font-size: 14px;
  }

  .message-content {
    max-width: 85%;
  }

  .app-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .header-left h1 {
    font-size: 20px;
    margin: 0;
  }

  .btn-secondary {
    font-size: 14px;
    padding: 10px 16px;
  }

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

  .users-table-container {
    padding: 16px;
  }

  .actions {
    flex-direction: column;
  }

  .main-nav {
    padding: 0;
    justify-content: center;
  }

  .nav-tab {
    flex: 1;
    padding: 14px 12px;
    font-size: 13px;
    justify-content: center;
    max-width: 50%;
    text-align: center;
  }

  .nav-label {
    font-weight: 600;
  }

  .nav-icon svg {
    width: 18px;
    height: 18px;
  }

  .aulas-container {
    padding: 0 20px;
  }

  .aulas-header h2 {
    font-size: 24px;
  }

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

  .modal-content {
    margin: 20px;
    max-width: calc(100% - 40px);
  }

  .chat-header {
    flex-wrap: wrap;
  }

  .btn-icon {
    font-size: 14px;
    padding: 8px 12px;
  }

  .section-header {
    margin-bottom: 20px;
    padding-bottom: 12px;
  }

  .btn-create-ai {
    font-size: 14px;
    padding: 10px 16px;
  }

  .btn-create-ai svg {
    width: 18px;
    height: 18px;
  }

  .dropdown-menu {
    right: 0;
    left: auto;
    min-width: 220px;
    max-width: 90vw;
  }

  .profile-icon {
    width: 22px;
    height: 22px;
  }

  .chevron-icon {
    width: 14px;
    height: 14px;
  }
}

/* Premium Badge e Locked Overlay */
.premium-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
  color: #000;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: bold;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(255, 215, 0, 0.4);
}

.ai-card {
  position: relative;
}

.ai-card.locked {
  opacity: 0.85;
  cursor: not-allowed;
}

.ai-card.locked:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.locked-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1;
  border-radius: 12px;
  backdrop-filter: blur(2px);
}

.lock-icon {
  font-size: 48px;
  margin-bottom: 8px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.1); opacity: 1; }
}

.locked-overlay p {
  color: #FFD700;
  font-weight: bold;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

/* Premium Modal Styles */
.premium-modal-content {
  max-width: 500px;
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  border: 2px solid #FFD700;
  box-shadow: 0 8px 32px rgba(255, 215, 0, 0.3);
}

.premium-modal-header {
  background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
  color: #000;
  padding: 24px;
  border-radius: 12px 12px 0 0;
  text-align: center;
  position: relative;
}

.premium-crown {
  font-size: 48px;
  margin-bottom: 8px;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.premium-modal-header h2 {
  margin: 0;
  font-size: 24px;
  font-weight: bold;
}

.close-premium-modal {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(0, 0, 0, 0.2);
  border: none;
  color: #000;
  font-size: 28px;
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.close-premium-modal:hover {
  background: rgba(0, 0, 0, 0.4);
  transform: rotate(90deg);
}

.premium-modal-body {
  padding: 32px 24px;
  text-align: center;
}

.premium-modal-body > p {
  font-size: 18px;
  color: #FFD700;
  margin-bottom: 24px;
  font-weight: 500;
}

.premium-benefits {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 215, 0, 0.1);
  padding: 12px 16px;
  border-radius: 8px;
  border-left: 3px solid #FFD700;
  transition: all 0.3s ease;
}

.benefit-item:hover {
  background: rgba(255, 215, 0, 0.2);
  transform: translateX(5px);
}

.benefit-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.benefit-item span:last-child {
  color: var(--text-color);
  font-size: 15px;
  text-align: left;
}

.premium-modal-footer {
  padding: 24px;
  display: flex;
  gap: 12px;
  justify-content: center;
  border-top: 1px solid rgba(255, 215, 0, 0.2);
}

.btn-premium {
  background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
  color: #000;
  border: none;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-premium:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
}

/* Tela de Visualização de Aula - Minimalista */
.aula-viewer-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 60px 30px;
}

.aula-viewer-header-simple {
  margin-bottom: 50px;
}

.btn-back-simple {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  padding: 8px 0;
  margin-bottom: 20px;
  transition: color 0.2s;
}

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

.aula-title-simple {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.aula-num-simple {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 600;
}

.aula-title-simple h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.audio-section-simple {
  margin-bottom: 50px;
}

.audio-section-simple audio {
  width: 100%;
  height: 50px;
  outline: none;
}

.roteiro-section-simple {
  border-top: 1px solid var(--border-color);
  padding-top: 40px;
}

.roteiro-text {
  white-space: pre-wrap;
  line-height: 1.8;
  color: var(--text-primary);
  font-size: 15px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Responsividade */
@media (max-width: 768px) {
  .landing-hero {
    padding: 60px 20px;
    min-height: 80vh;
  }

  .landing-title {
    font-size: 32px;
  }

  .landing-subtitle {
    font-size: 16px;
  }

  .btn-cta {
    padding: 14px 32px;
    font-size: 15px;
  }

  .landing-section {
    padding: 60px 20px;
  }

  .section-title {
    font-size: 24px;
    margin-bottom: 40px;
  }

  .aulas-preview {
    margin-bottom: 60px;
    gap: 16px;
  }

  .aula-preview-item {
    padding: 20px;
    flex-direction: column;
    gap: 12px;
  }

  .aula-preview-num {
    font-size: 16px;
  }

  .aula-preview-content h3 {
    font-size: 16px;
  }

  .aula-preview-content p {
    font-size: 13px;
  }

  .curso-features {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .auth-section {
    padding: 60px 20px;
  }

  .auth-container {
    padding: 30px 20px;
  }

  .aulas-container {
    padding: 40px 20px;
  }

  .aula-item {
    padding: 20px;
  }

  .aula-item-info {
    gap: 16px;
  }

  .aula-viewer-container {
    padding: 40px 20px;
  }

  .aula-viewer-header-simple {
    margin-bottom: 40px;
  }

  .aula-title-simple {
    flex-direction: column;
    gap: 8px;
  }

  .aula-title-simple h2 {
    font-size: 20px;
  }

  .roteiro-text {
    font-size: 14px;
  }
}