:root {
  --verbs-bg: #f8fafc;
  --verbs-panel: #ffffff;
  --verbs-text: #172033;
  --verbs-muted: #64748b;
  --verbs-border: #dbe3ee;
  --verbs-accent: #2563eb;
  --verbs-accent-dark: #1d4ed8;
  --verbs-accent-soft: #eff6ff;
  --verbs-success: #047857;
  --verbs-success-bg: #ecfdf5;
  --verbs-danger: #b91c1c;
  --verbs-danger-bg: #fef2f2;
  --verbs-example: #7c3aed;
  --verbs-example-bg: #f5f3ff;
}

* { box-sizing: border-box; }

body.verbs-page {
  margin: 0;
  min-height: 100vh;
  background: var(--verbs-bg);
  color: var(--verbs-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#nav-placeholder:empty,
#footer-placeholder:empty { display: none; }

.verbs-shell {
  width: min(100% - 32px, 980px);
  margin: 0 auto;
  padding: 48px 0 64px;
}

.verbs-hero { text-align: center; margin-bottom: 28px; }

.level-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 13px;
  border-radius: 999px;
  background: var(--verbs-accent-soft);
  color: var(--verbs-accent-dark);
  border: 1px solid #bfdbfe;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.verbs-hero h1 {
  margin: 16px 0 10px;
  font-size: clamp(2rem, 5vw, 3.35rem);
  line-height: 1.08;
}

.verbs-hero p {
  max-width: 740px;
  margin: 0 auto;
  color: var(--verbs-muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.panel {
  background: var(--verbs-panel);
  border: 1px solid var(--verbs-border);
  border-radius: 26px;
  padding: clamp(22px, 4vw, 38px);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

.hidden { display: none !important; }
.section-heading { margin-bottom: 22px; }

.eyebrow,
.question-label,
.example-label {
  margin: 0 0 6px;
  color: var(--verbs-accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.section-heading h2,
.quiz-topbar h2,
.result-panel h2 { margin: 0; }

.level-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.level-card {
  width: 100%;
  min-height: 290px;
  padding: 24px;
  border: 2px solid var(--verbs-border);
  border-radius: 22px;
  background: #fff;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.level-card:hover,
.level-card:focus-visible {
  border-color: var(--verbs-accent);
  background: var(--verbs-accent-soft);
  transform: translateY(-2px);
}

.level-card-chip {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--verbs-accent);
  color: #fff;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.level-card-title,
.level-card-count,
.level-card-copy,
.level-card-action { display: block; }

.level-card-title { margin-top: 18px; font-size: 1.35rem; font-weight: 850; }
.level-card-count { margin-top: 5px; color: var(--verbs-accent-dark); font-weight: 800; }
.level-card-copy { margin-top: 14px; color: var(--verbs-muted); line-height: 1.65; }
.level-card-action { margin-top: 22px; color: var(--verbs-accent-dark); font-weight: 850; }

.rules-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.rules-strip > div {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 14px;
  border: 1px solid var(--verbs-border);
  border-radius: 15px;
  background: #f8fafc;
}

.rules-strip strong {
  display: grid;
  place-items: center;
  flex: 0 0 29px;
  height: 29px;
  border-radius: 50%;
  background: var(--verbs-accent-soft);
  color: var(--verbs-accent-dark);
}

.rules-strip span { color: var(--verbs-muted); font-size: 0.9rem; line-height: 1.4; }

.quiz-topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.text-btn {
  padding: 7px 0;
  border: 0;
  background: transparent;
  color: var(--verbs-accent-dark);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 14px;
}

.stat-box {
  padding: 14px 16px;
  border: 1px solid var(--verbs-border);
  border-radius: 16px;
  background: #f8fafc;
}

.stat-box span,
.result-summary span {
  display: block;
  color: var(--verbs-muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.stat-box strong { display: block; margin-top: 4px; font-size: 1.15rem; }

.progress-track {
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: #e2e8f0;
}

.progress-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--verbs-accent);
  transition: width 220ms ease;
}

.question-area { margin-top: 34px; }
.question-area > h3 { margin: 0; font-size: clamp(2rem, 7vw, 3.25rem); line-height: 1.14; }
.question-help { margin: 10px 0 24px; color: var(--verbs-muted); }

.options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px;
}

.option-btn {
  min-height: 66px;
  padding: 15px 18px;
  border: 2px solid var(--verbs-border);
  border-radius: 17px;
  background: #fff;
  color: var(--verbs-text);
  font: inherit;
  font-size: 1.08rem;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.option-btn:hover:not(:disabled),
.option-btn:focus-visible:not(:disabled) {
  border-color: var(--verbs-accent);
  background: var(--verbs-accent-soft);
  transform: translateY(-1px);
}

.option-btn:disabled { cursor: default; }
.option-btn.correct-option { border-color: #10b981; background: var(--verbs-success-bg); color: var(--verbs-success); }
.option-btn.wrong-option { border-color: #ef4444; background: var(--verbs-danger-bg); color: var(--verbs-danger); }

.feedback {
  margin-top: 22px;
  padding: 20px;
  border: 1px solid;
  border-radius: 18px;
}

.feedback.correct { border-color: #a7f3d0; background: var(--verbs-success-bg); }
.feedback.incorrect { border-color: #fecaca; background: var(--verbs-danger-bg); }
.feedback-title { margin: 0; font-weight: 850; }
.feedback.correct .feedback-title { color: var(--verbs-success); }
.feedback.incorrect .feedback-title { color: var(--verbs-danger); }

.answer-pair { margin: 14px 0 0; }
.correct-spanish { margin: 0; font-size: 1.55rem; font-weight: 900; }
.correct-english { margin: 5px 0 0; color: var(--verbs-muted); }

.example-box {
  margin: 18px 0;
  padding: 16px;
  border: 1px solid #ddd6fe;
  border-radius: 15px;
  background: var(--verbs-example-bg);
}

.example-label { color: var(--verbs-example); }
.example-spanish { margin: 0; color: #4c1d95; font-size: 1.15rem; font-weight: 850; line-height: 1.5; }
.example-english { margin: 6px 0 0; color: #6d28d9; line-height: 1.5; }

.primary-btn,
.secondary-btn {
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 13px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.primary-btn { border: 1px solid var(--verbs-accent); background: var(--verbs-accent); color: white; }
.primary-btn:hover,
.primary-btn:focus-visible { background: var(--verbs-accent-dark); }
.secondary-btn { border: 1px solid var(--verbs-border); background: white; color: var(--verbs-text); }
.secondary-btn:hover,
.secondary-btn:focus-visible { border-color: var(--verbs-accent); background: var(--verbs-accent-soft); }
.feedback .primary-btn { margin-top: 18px; }

.result-panel { text-align: center; }
.result-icon { font-size: 4rem; }
.result-panel h2 { margin-top: 7px; font-size: clamp(2rem, 5vw, 3rem); }
.result-panel > p:not(.eyebrow) { max-width: 700px; margin: 13px auto 0; color: var(--verbs-muted); line-height: 1.7; }

.result-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 26px 0;
}

.result-summary > div { padding: 17px; border: 1px solid var(--verbs-border); border-radius: 16px; background: #f8fafc; }
.result-summary strong { display: block; margin-top: 5px; font-size: 1.3rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; }
.button-row.centered { justify-content: center; }

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.related-grid a {
  padding: 20px;
  border: 1px solid var(--verbs-border);
  border-radius: 18px;
  background: #fff;
  color: inherit;
  text-decoration: none;
  transition: border-color 150ms ease, transform 150ms ease;
}
.related-grid a:hover,
.related-grid a:focus-visible { border-color: var(--verbs-accent); transform: translateY(-2px); }
.related-grid strong,
.related-grid span { display: block; }
.related-grid span { margin-top: 7px; color: var(--verbs-muted); line-height: 1.5; }

@media (max-width: 720px) {
  .verbs-shell { width: min(100% - 22px, 980px); padding: 30px 0 48px; }
  .level-grid,
  .options-grid,
  .related-grid { grid-template-columns: 1fr; }
  .rules-strip { grid-template-columns: 1fr; }
  .level-card { min-height: 0; }
}

@media (max-width: 520px) {
  .panel { border-radius: 20px; }
  .quiz-topbar { align-items: center; }
  .stats-grid,
  .result-summary { grid-template-columns: 1fr; }
  .stat-box { display: flex; align-items: center; justify-content: space-between; }
  .stat-box strong { margin-top: 0; }
  .button-row > button { width: 100%; }
}