:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface-2: #243044;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --mario-red: #e52521;
  --mario-blue: #049cd8;
  --mario-yellow: #fbd000;
  --mario-green: #43b047;
  --smell: #f97316;
  --clean: #22c55e;
  --wrong: #ef4444;
  --correct: #22c55e;
  --radius: 12px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "Cascadia Code", "Consolas", "Monaco", monospace;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--mario-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.site-header {
  background: linear-gradient(135deg, #1a2332 0%, #0f1419 100%);
  border-bottom: 3px solid var(--mario-red);
  padding: 1.25rem 0;
}

.site-header .container {
  padding-top: 0;
  padding-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--mario-red);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: white;
  border: 2px solid var(--mario-yellow);
}

.logo h1 {
  font-size: 1.15rem;
  font-weight: 700;
}

.logo p {
  font-size: 0.8rem;
  color: var(--muted);
}

nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

nav a {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  border: 1px solid transparent;
  text-decoration: none;
}

nav a:hover {
  background: var(--surface-2);
  text-decoration: none;
}

nav a.active {
  background: var(--surface-2);
  border-color: var(--mario-blue);
  color: var(--mario-blue);
}

.hero {
  text-align: center;
  padding: 3rem 0 2rem;
}

.hero h2 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  margin-bottom: 0.75rem;
}

.hero p {
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 2rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform 0.15s, border-color 0.15s;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--mario-blue);
}

.card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.15s, transform 0.1s;
}

.btn:hover {
  opacity: 0.9;
  text-decoration: none;
  transform: translateY(-1px);
}

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

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-success {
  background: var(--mario-green);
  color: white;
}

.page-title {
  margin-bottom: 0.5rem;
  font-size: 1.75rem;
}

.page-subtitle {
  color: var(--muted);
  margin-bottom: 2rem;
}

/* Comparativo */

.smell-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.smell-tab {
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.15s;
}

.smell-tab:hover {
  border-color: var(--mario-blue);
  color: var(--text);
}

.smell-tab.active {
  background: var(--mario-blue);
  border-color: var(--mario-blue);
  color: white;
}

.comparison-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.comparison-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.comparison-header h3 {
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}

.comparison-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-smell {
  background: rgba(249, 115, 22, 0.2);
  color: var(--smell);
  border: 1px solid var(--smell);
}

.badge-clean {
  background: rgba(34, 197, 94, 0.15);
  color: var(--clean);
  border: 1px solid var(--clean);
}

.badge-technique {
  background: rgba(4, 156, 216, 0.15);
  color: var(--mario-blue);
  border: 1px solid var(--mario-blue);
}

.view-toggle {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
}

.view-toggle button {
  flex: 1;
  padding: 0.75rem;
  border: none;
  background: var(--surface-2);
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.15s;
}

.view-toggle button.active-smell {
  background: rgba(249, 115, 22, 0.12);
  color: var(--smell);
  box-shadow: inset 0 -3px 0 var(--smell);
}

.view-toggle button.active-clean {
  background: rgba(34, 197, 94, 0.1);
  color: var(--clean);
  box-shadow: inset 0 -3px 0 var(--clean);
}

.view-toggle button.active-both {
  background: rgba(4, 156, 216, 0.1);
  color: var(--mario-blue);
  box-shadow: inset 0 -3px 0 var(--mario-blue);
}

.code-views {
  display: grid;
  grid-template-columns: 1fr;
}

.code-views.split {
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 768px) {
  .code-views.split {
    grid-template-columns: 1fr;
  }
}

.code-block-wrap {
  border-right: 1px solid var(--border);
}

.code-block-wrap:last-child {
  border-right: none;
}

.code-block-label {
  padding: 0.6rem 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.code-block-label.smell-label {
  background: rgba(249, 115, 22, 0.08);
  color: var(--smell);
}

.code-block-label.clean-label {
  background: rgba(34, 197, 94, 0.08);
  color: var(--clean);
}

.code-block {
  margin: 0;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
  background: #0d1117;
  color: #c9d1d9;
  min-height: 200px;
  white-space: pre;
}

.comparison-explanation {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--surface-2);
}

.comparison-explanation h4 {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  color: var(--mario-yellow);
}

.comparison-explanation p {
  color: var(--muted);
  font-size: 0.92rem;
}

.comparison-explanation ul {
  margin-top: 0.5rem;
  padding-left: 1.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.comparison-explanation li {
  margin-bottom: 0.25rem;
}

.comparison-nav-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 1.5rem;
  gap: 1rem;
}

.hidden {
  display: none !important;
}

/* Quiz */

.quiz-progress {
  background: var(--surface);
  border-radius: 999px;
  height: 8px;
  margin-bottom: 2rem;
  overflow: hidden;
}

.quiz-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--mario-red), var(--mario-yellow));
  transition: width 0.3s;
  border-radius: 999px;
}

.quiz-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.quiz-question-number {
  color: var(--mario-blue);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.quiz-question-text {
  font-size: 1.15rem;
  margin-bottom: 1.25rem;
}

.quiz-snippet {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.25rem;
  overflow-x: auto;
}

.quiz-snippet pre {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  text-align: left;
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.95rem;
  width: 100%;
}

.quiz-option:hover:not(:disabled) {
  border-color: var(--mario-blue);
}

.quiz-option.selected:not(:disabled) {
  border-color: var(--mario-blue);
  background: rgba(4, 156, 216, 0.12);
  box-shadow: 0 0 0 1px var(--mario-blue);
}

.quiz-option:disabled {
  cursor: default;
}

.quiz-option.correct {
  border-color: var(--correct);
  background: rgba(34, 197, 94, 0.1);
}

.quiz-option.wrong {
  border-color: var(--wrong);
  background: rgba(239, 68, 68, 0.1);
}

.quiz-option-letter {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.quiz-feedback {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  font-size: 0.95rem;
}

.quiz-feedback.correct {
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid var(--correct);
  color: #86efac;
}

.quiz-feedback.wrong {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid var(--wrong);
  color: #fca5a5;
}

.quiz-actions {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.quiz-result {
  text-align: center;
  padding: 2rem;
}

.quiz-result-score {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--mario-yellow);
  line-height: 1;
  margin: 1rem 0;
}

.quiz-result-message {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.quiz-result-detail {
  color: var(--muted);
  margin-bottom: 2rem;
}

.quiz-review {
  text-align: left;
  margin-top: 2rem;
}

.quiz-review-item {
  background: var(--surface-2);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
}

.quiz-review-item.correct-item {
  border-left: 4px solid var(--correct);
}

.quiz-review-item.wrong-item {
  border-left: 4px solid var(--wrong);
}

.quiz-download-section {
  text-align: left;
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.quiz-download-section h4 {
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.quiz-download-section > p {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.quiz-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.form-field input {
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  font-family: var(--font);
}

.form-field input:focus {
  outline: none;
  border-color: var(--mario-blue);
  box-shadow: 0 0 0 2px rgba(4, 156, 216, 0.2);
}

.form-field input.input-error {
  border-color: var(--wrong);
}

.form-error {
  color: #fca5a5;
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
  min-height: 1.25rem;
}

footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}