/* Reset e Variáveis */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-dark: #0a0f1e;
  --bg-panel: #0f1729;
  --bg-card: #1a2332;
  --border: rgba(255, 255, 255, 0.1);
  --text: #e2e8f0;
  --text-muted: rgba(255, 255, 255, 0.6);
  --accent: #3b82f6;
  --accent-2: #8b5cf6;
  --success: #22c55e;
  --warning: #f59e0b;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* Header */
.header {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand h1 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.xp-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(250, 204, 21, 0.1);
  border: 1px solid rgba(250, 204, 21, 0.3);
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s;
}

.xp-badge:hover {
  transform: scale(1.05);
}

.xp-icon {
  font-size: 1.2rem;
}

.xp-value {
  font-weight: 700;
  color: #fbbf24;
}

.progress-chip {
  padding: 0.5rem 1rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

/* Seletor de Trilha */
.trail-selector {
  padding: 1.5rem 2rem;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.trail-selector label {
  font-weight: 600;
  color: var(--text);
}

.trail-selector select {
  flex: 1;
  max-width: 400px;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  transition: border-color 0.2s;
}

.trail-selector select:hover {
  border-color: var(--accent);
}

.trail-selector select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Layout Principal */
.main-layout {
  display: grid;
  grid-template-columns: 280px 1fr 280px;
  gap: 1rem;
  padding: 1rem 2rem 2rem 2rem;
  flex: 1;
  overflow: hidden;
}

/* Sidebars */
.sidebar {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  overflow-y: auto;
  transition: transform 0.3s ease;
}

.sidebar.hidden {
  transform: translateX(-100%);
  opacity: 0;
  pointer-events: none;
}

.sidebar-right.hidden {
  transform: translateX(100%);
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.toggle-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0.25rem;
  transition: color 0.2s;
}

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

/* Trail Info */
.trail-info {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.trail-info h4 {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.trail-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Trail Steps */
.trail-steps {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.trail-step {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.trail-step:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent);
}

.trail-step.active {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--accent);
}

.trail-step.completed {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.3);
}

.step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.trail-step.active .step-number {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
}

.trail-step.completed .step-number {
  background: var(--success);
  color: white;
}

.step-title {
  font-size: 0.85rem;
  flex: 1;
}

/* Lesson Area */
.lesson-area {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow: hidden;
}

.lesson-content {
  flex: 1;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  overflow-y: auto;
  scroll-behavior: smooth;
}

.loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

/* Lesson Navigation */
.lesson-nav {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.nav-btn {
  flex: 1;
  padding: 0.875rem 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.nav-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.nav-btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
}

.nav-btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Completed List */
.completed-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.completed-item {
  padding: 0.75rem;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: 6px;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.completed-item::before {
  content: '✓';
  color: var(--success);
  font-weight: 700;
}

.empty-message {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Lesson Card Styles */
.lesson-header {
  margin-bottom: 2rem;
}

.lesson-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 999px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.lesson-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.lesson-meta {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.storyline {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.08));
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 8px;
  font-size: 1.05rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
}

/* Story Blocks */
.story-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.story-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

.story-block-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.story-block p {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-muted);
  margin: 0;
}

.story-hint {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.story-hint summary {
  color: var(--accent);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
}

.story-hint p {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  font-style: italic;
}

/* Content Styling */
.lesson-content p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.lesson-content ul, .lesson-content ol {
  margin: 1rem 0 1rem 1.5rem;
}

.lesson-content li {
  margin-bottom: 0.5rem;
}

.lesson-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.lesson-content a:hover {
  border-bottom-color: var(--accent);
}

/* Progress Checkbox */
.progress-row {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.progress-row label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  font-weight: 600;
}

.progress-row input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

/* Quiz Styles */
.quiz-card {
  background: var(--bg-card);
  border: 2px solid rgba(139, 92, 246, 0.3);
  border-radius: 12px;
  padding: 2rem;
  margin-top: 2rem;
}

.quiz-question {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.quiz-option:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent);
  transform: translateX(4px);
}

.quiz-option input {
  cursor: pointer;
  width: 18px;
  height: 18px;
}

/* Buttons */
.cta {
  padding: 0.875rem 1.75rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-block;
  text-decoration: none;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.5);
}

.cta:active {
  transform: translateY(0);
}

.cta-success {
  background: linear-gradient(135deg, var(--success), #16a34a);
}

.cta-warning {
  background: linear-gradient(135deg, var(--warning), #d97706);
}

/* Transitions suaves */
* {
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 2rem;
}

.modal-content {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-certificate {
  max-width: 700px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-header h2 {
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 2rem;
  cursor: pointer;
  transition: color 0.2s;
}

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

/* Badge Grid */
.badge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}

.badge-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 1rem;
  text-align: center;
  opacity: 0.4;
}

.badge-item.earned {
  opacity: 1;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
  border-color: var(--accent);
}

.badge-emoji {
  font-size: 3rem;
  display: block;
  margin-bottom: 0.5rem;
}

.badge-name {
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.badge-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Footer */
.footer {
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1200px) {
  .main-layout {
    grid-template-columns: 240px 1fr 240px;
  }
}

@media (max-width: 968px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    display: none;
  }
  
  .header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  
  .header-actions {
    width: 100%;
    justify-content: space-between;
  }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}