: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-warning: #b45309;
  --verbs-warning-bg: #fff7ed;
}

* {
  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: 720px;
  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;
}

.section-heading.compact {
  margin-bottom: 16px;
}

.eyebrow,
.question-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,
.section-heading h3,
.quiz-topbar h2,
.result-panel h2 {
  margin: 0;
}

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

.mode-card {
  width: 100%;
  min-height: 220px;
  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;
}

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

.mode-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid #bfdbfe;
  font-size: 1.45rem;
}

.mode-title,
.mode-copy {
  display: block;
}

.mode-title {
  margin-bottom: 8px;
  font-size: 1.2rem;
  font-weight: 800;
}

.mode-copy {
  color: var(--verbs-muted);
  line-height: 1.6;
}

.settings-block {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--verbs-border);
}

.choice-row {
  display: grid;
  gap: 12px;
}

.two-columns {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.three-columns {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.setting-option {
  position: relative;
  display: block;
  cursor: pointer;
}

.setting-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.setting-option > span {
  display: flex;
  min-height: 112px;
  flex-direction: column;
  justify-content: center;
  padding: 18px;
  border: 2px solid var(--verbs-border);
  border-radius: 18px;
  background: #fff;
  transition: border-color 160ms ease, background 160ms ease;
}

.setting-option input:checked + span {
  border-color: var(--verbs-accent);
  background: var(--verbs-accent-soft);
}

.setting-option strong {
  font-size: 1.08rem;
}

.setting-option small {
  margin-top: 4px;
  color: var(--verbs-muted);
  font-size: 0.9rem;
}

.pattern-example {
  margin-top: 10px;
  color: var(--verbs-accent-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 800;
  letter-spacing: 0.07em;
}

.settings-note {
  margin: 16px 0 20px;
  color: var(--verbs-muted);
  line-height: 1.6;
}

.primary-btn,
.secondary-btn,
.text-btn,
.option-btn {
  font: inherit;
}

.primary-btn,
.secondary-btn {
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 13px;
  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);
}

.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-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 {
  width: 100%;
  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: 30px;
}

.question-area > h3 {
  margin: 0 0 24px;
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  line-height: 1.18;
}

.answer-area {
  margin-top: 12px;
}

.letter-pattern {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.letter-box {
  display: grid;
  place-items: center;
  width: 42px;
  height: 48px;
  border: 2px solid var(--verbs-border);
  border-radius: 10px;
  background: #f8fafc;
  color: var(--verbs-accent-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.18rem;
  font-weight: 900;
  text-transform: uppercase;
}

.input-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 800;
}

#fill-answer {
  width: 100%;
  min-height: 54px;
  padding: 12px 15px;
  border: 2px solid var(--verbs-border);
  border-radius: 14px;
  background: #fff;
  color: var(--verbs-text);
  font: inherit;
  font-size: 1.08rem;
}

#fill-answer:focus {
  border-color: var(--verbs-accent);
  outline: 3px solid rgba(37, 99, 235, 0.15);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.button-row.centered {
  justify-content: center;
}

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

.option-btn {
  min-height: 68px;
  padding: 16px 18px;
  border: 2px solid var(--verbs-border);
  border-radius: 16px;
  background: #fff;
  color: var(--verbs-text);
  text-align: left;
  font-size: 1.05rem;
  font-weight: 800;
  cursor: pointer;
}

.option-btn:hover,
.option-btn:focus-visible {
  border-color: var(--verbs-accent);
  background: var(--verbs-accent-soft);
}

.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);
}

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

.feedback {
  margin-top: 24px;
  padding: 20px;
  border: 1px solid var(--verbs-border);
  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 0 12px;
  font-weight: 900;
}

.feedback.correct .feedback-title {
  color: var(--verbs-success);
}

.feedback.incorrect .feedback-title {
  color: var(--verbs-danger);
}

.correct-spanish {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 900;
}

.correct-english {
  margin: 5px 0 0;
  color: var(--verbs-muted);
  font-size: 1rem;
}

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

.result-icon {
  font-size: 3.5rem;
}

.result-panel > p:not(.eyebrow) {
  max-width: 680px;
  margin: 12px auto 0;
  color: var(--verbs-muted);
  line-height: 1.7;
}

.result-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 680px;
  margin: 28px auto 0;
}

.result-summary > div {
  padding: 17px;
  border: 1px solid var(--verbs-border);
  border-radius: 16px;
  background: #f8fafc;
}

.result-summary strong {
  display: block;
  margin-top: 6px;
  font-size: 1.45rem;
}

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

.related-grid a {
  display: block;
  padding: 18px;
  border: 1px solid var(--verbs-border);
  border-radius: 17px;
  background: white;
  color: var(--verbs-text);
  text-decoration: none;
}

.related-grid a:hover,
.related-grid a:focus-visible {
  border-color: var(--verbs-accent);
}

.related-grid strong,
.related-grid span {
  display: block;
}

.related-grid span {
  margin-top: 6px;
  color: var(--verbs-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

@media (max-width: 760px) {
  .mode-grid,
  .two-columns,
  .three-columns,
  .options-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid,
  .result-summary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .stat-box,
  .result-summary > div {
    padding: 12px 10px;
  }

  .letter-box {
    width: 36px;
    height: 43px;
  }
}

@media (max-width: 520px) {
  .verbs-shell {
    width: min(100% - 20px, 980px);
    padding-top: 28px;
  }

  .panel {
    padding: 20px 16px;
    border-radius: 20px;
  }

  .quiz-topbar {
    flex-direction: column;
    gap: 4px;
  }

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

  .button-row .primary-btn,
  .button-row .secondary-btn {
    width: 100%;
  }
}