/* Business English only. Keep shared navigation and theme persistence intact. */
body.biz-practice [hidden] { display: none !important; }
body.biz-practice .biz-shell { width: 100%; max-width: 800px; margin: 0; padding: 0; }
body.biz-practice .module-header { display: block; margin-bottom: 28px; }
body.biz-practice .module-header p { font-size: 15px; margin-top: 10px; color: var(--muted); }
body.biz-practice .tab-bar { background: var(--practice-card); border-color: var(--border); margin-bottom: 28px; gap: 8px; padding: 6px; }
body.biz-practice .tab-btn { min-width: 0; min-height: 48px; font-size: 14px; font-weight: 500; white-space: normal; line-height: 1.5; padding: 12px; }
body.biz-practice .tab-btn.active { color: var(--sky); background: var(--practice-accent-wash); }
body.biz-practice .section-heading { font-size: 14px; font-weight: 600; letter-spacing: 0; text-transform: none; }
body.biz-practice .daily-card { background: var(--practice-card); border-color: var(--border); padding: 24px; border-radius: 16px; margin-bottom: 28px; }
body.biz-practice .daily-card::before { display: none; }
body.biz-practice .daily-badge { color: var(--sky); background: var(--practice-accent-wash); border-color: var(--border); font-size: 12px; letter-spacing: 0; text-transform: none; font-weight: 500; }
body.biz-practice .daily-phrase-text { font-family: inherit; font-size: 23px; font-weight: 500; line-height: 1.6; }
body.biz-practice .daily-breakdown,
body.biz-practice .daily-alt,
body.biz-practice .daily-loading { color: var(--muted); font-size: 14px; line-height: 1.7; }
body.biz-practice .daily-breakdown { border-color: var(--border); }
body.biz-practice .domain-grid { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
body.biz-practice .domain-card { min-width: 0; min-height: 144px; background: var(--practice-card); border-color: var(--border); padding: 20px; text-align: start; gap: 12px; }
body.biz-practice .domain-card:hover { background: var(--practice-accent-wash); border-color: var(--sky); transform: none; }
body.biz-practice .domain-name { font-size: 16px; font-weight: 600; color: var(--text); line-height: 1.5; overflow-wrap: anywhere; }
body.biz-practice .domain-desc { font-size: 13px; line-height: 1.6; overflow-wrap: anywhere; }
body.biz-practice .domain-emoji svg { width: 24px; height: 24px; }
body.biz-practice .practice-empty { padding: 24px 16px; font-size: 15px; line-height: 1.7; }
body.biz-practice .practice-top { gap: 16px; margin-bottom: 24px; }
body.biz-practice .practice-domain-label { font-size: 20px; font-weight: 600; }
body.biz-practice .ex-type-group { gap: 10px; }
body.biz-practice .ex-type-btn,
body.biz-practice .back-btn { min-height: 44px; font-size: 14px; font-weight: 500; color: var(--muted); background: var(--practice-card); border-color: var(--border2); border-radius: 12px; }
body.biz-practice .ex-type-btn.active { color: var(--sky); background: var(--practice-accent-wash); border-color: var(--sky); }
body.biz-practice .exercise-card,
body.biz-practice .feedback-result,
body.biz-practice .quiz-card { background: var(--practice-card); border-color: var(--border); border-radius: 20px; padding: 32px; }
body.biz-practice .exercise-scenario { font-size: 17px; line-height: 1.7; }
body.biz-practice .exercise-task { color: var(--text); font-family: inherit; font-size: clamp(21px,2.8vw,25px); font-weight: 500; line-height: 1.6; }
body.biz-practice .exercise-context { border-color: var(--border); font-size: 15px; line-height: 1.7; }
body.biz-practice .exercise-scenario,
body.biz-practice .exercise-task,
body.biz-practice .exercise-context { overflow-wrap: anywhere; }
body.biz-practice .useful-phrases-label,
body.biz-practice .response-label-text { color: var(--muted); font-size: 14px; font-weight: 500; letter-spacing: 0; text-transform: none; }
body.biz-practice .phrase-chips { gap: 10px; }
body.biz-practice .phrase-chip { min-height: 44px; padding: 10px 14px; font: inherit; font-size: 14px; color: var(--sky); background: var(--practice-accent-wash); border-color: var(--border2); border-radius: 12px; text-align: start; }
body.biz-practice .phrase-chip:hover { color: var(--text); background: var(--surface2); }
body.biz-practice .response-label { flex-wrap: wrap; gap: 12px; }
body.biz-practice .response-char { color: var(--muted); font-size: 13px; }
body.biz-practice .response-char.warn { color: var(--coral); }
body.biz-practice #response-input { min-height: 180px; padding: 16px 20px; font-size: 18px; line-height: 1.7; color: var(--text); background: var(--practice-card); border-color: var(--border2); }
body.biz-practice #response-input:focus { border-color: var(--sky); box-shadow: none; }
body.biz-practice #response-input::placeholder { color: var(--muted); opacity: 1; }
body.biz-practice #businessResponseAdvice { color: var(--muted) !important; font-size: 13px !important; line-height: 1.7 !important; }
body.biz-practice .submit-exercise-btn,
body.biz-practice .quiz-next-btn,
body.biz-practice .restart-quiz-btn { min-height: 48px; font-size: 15px; font-weight: 600; background: var(--sky); color: var(--practice-on-accent); border-radius: 12px; transform: none; opacity: 1; }
body.biz-practice .submit-exercise-btn:hover:not(:disabled),
body.biz-practice .quiz-next-btn:hover,
body.biz-practice .restart-quiz-btn:hover { background: var(--sky2); color: var(--practice-on-accent); opacity: 1; transform: none; }
body.biz-practice .new-exercise-btn,
body.biz-practice .try-again-btn { min-height: 48px; font-size: 14px; font-weight: 500; color: var(--muted); background: transparent; border-color: var(--border2); }
body.biz-practice .new-exercise-btn:hover,
body.biz-practice .try-again-btn:hover { color: var(--text); background: var(--surface2); }
body.biz-practice :is(.submit-exercise-btn,.new-exercise-btn,.back-btn,.ex-type-btn,.domain-card,.phrase-chip):disabled { color: var(--muted); background: var(--bg3); border-color: var(--border); cursor: not-allowed; opacity: 1; transform: none; }
body.biz-practice .spinner { border-color: var(--border2); border-top-color: var(--muted); }
body.biz-practice .exercise-loading { background: var(--practice-card); border-color: var(--border); color: var(--muted); font-size: 15px; padding: 28px 20px; }
body.biz-practice .feedback-title { color: var(--text); font-size: 22px; line-height: 1.5; font-weight: 600; margin-bottom: 24px; }
body.biz-practice .feedback-title:focus { outline: none; }
body.biz-practice .business-feedback-error { color: var(--coral); font-size: 16px; line-height: 1.7; overflow-wrap: anywhere; }
body.biz-practice .score-row { gap: 20px; flex-wrap: wrap; }
body.biz-practice .score-num { font-weight: 600; }
body.biz-practice .score-label { opacity: 1; font-size: 11px; }
body.biz-practice .grade-badge { font-weight: 500; max-width: 100%; overflow-wrap: anywhere; }
body.biz-practice .feedback-overall,
body.biz-practice .feedback-list li,
body.biz-practice .rewrite-text { font-size: 16px; line-height: 1.7; overflow-wrap: anywhere; }
body.biz-practice .feedback-section-title,
body.biz-practice .rewrite-label,
body.biz-practice .vocab-highlight-label { font-size: 14px; font-weight: 600; letter-spacing: 0; text-transform: none; }
body.biz-practice .feedback-section-title.strengths,
body.biz-practice .feedback-list.strength-list li::before,
body.biz-practice .rewrite-label { color: var(--mint); }
body.biz-practice .feedback-section-title.improvements,
body.biz-practice .feedback-list.improve-list li::before { color: var(--gold); }
body.biz-practice .rewrite-block { background: var(--bg); border-color: var(--border); padding: 20px; }
body.biz-practice .vocab-chip { color: var(--text); background: var(--bg); border-color: var(--border); font-size: 14px; line-height: 1.7; overflow-wrap: anywhere; }
body.biz-practice .vocab-intro { font-size: 15px; line-height: 1.7; }
body.biz-practice .vocab-mode-btn { min-height: 48px; font-size: 14px; font-weight: 500; color: var(--muted); background: var(--practice-card); border-color: var(--border2); }
body.biz-practice .vocab-mode-btn.active { color: var(--sky); background: var(--practice-accent-wash); border-color: var(--sky); }
body.biz-practice .vocab-list { gap: 16px; }
body.biz-practice .vocab-item { background: var(--practice-card); border-color: var(--border); padding: 24px; border-radius: 16px; gap: 24px; }
body.biz-practice .vocab-word { min-width: 0; flex: 0 0 160px; font-size: 19px; font-weight: 500; line-height: 1.5; overflow-wrap: anywhere; }
body.biz-practice .vocab-item > div:last-child { min-width: 0; }
body.biz-practice .vocab-def { font-size: 16px; line-height: 1.7; }
body.biz-practice .vocab-example { color: var(--muted); font-size: 14px; line-height: 1.7; }
body.biz-practice .quiz-progress { color: var(--muted); font-size: 13px; gap: 16px; flex-wrap: wrap; }
body.biz-practice .quiz-progress-bar { height: 6px; background: var(--bg3); }
body.biz-practice .quiz-question { font-size: 14px; font-weight: 500; color: var(--muted); letter-spacing: 0; text-transform: none; }
body.biz-practice .quiz-word { font-size: 28px; font-weight: 500; line-height: 1.5; overflow-wrap: anywhere; }
body.biz-practice .quiz-option { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 56px; padding: 16px 20px; background: var(--bg); color: var(--text); border-color: var(--border2); font-size: 17px; line-height: 1.6; text-align: start; }
body.biz-practice .quiz-option > span:first-child { min-width: 0; overflow-wrap: anywhere; }
body.biz-practice .business-quiz-marker { flex-shrink: 0; font-size: 20px; }
body.biz-practice .quiz-option:hover:not(:disabled) { background: var(--practice-accent-wash); border-color: var(--sky); }
body.biz-practice .quiz-option.correct { color: var(--mint); border-color: var(--mint); background: var(--bg); }
body.biz-practice .quiz-option.wrong { color: var(--coral); border-color: var(--coral); background: var(--bg); }
body.biz-practice .quiz-feedback { font-size: 16px; line-height: 1.7; text-align: start; overflow-wrap: anywhere; }
body.biz-practice .quiz-done { background: var(--practice-card); border: 1px solid var(--border); border-radius: 20px; padding: 32px; }
body.biz-practice .quiz-done-title { font-size: 25px; font-weight: 600; line-height: 1.5; }
body.biz-practice .quiz-done-score { font-size: 16px; line-height: 1.7; }
body.biz-practice .quiz-done-icon svg { width: 40px; height: 40px; }
body.biz-practice .pq-guard-card { background: var(--practice-card); border-color: var(--border); box-shadow: none; }
body.biz-practice .pq-guard-actions .primary { background: var(--sky); color: var(--practice-on-accent); }

@media (max-width: 860px) {
  body.biz-practice .exercise-card,
  body.biz-practice .feedback-result,
  body.biz-practice .quiz-card,
  body.biz-practice .quiz-done { padding: 20px; border-radius: 16px; }
  body.biz-practice .domain-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
  body.biz-practice .vocab-item { flex-direction: column; gap: 12px; padding: 20px; }
  body.biz-practice .vocab-word { flex: 0 1 auto; }
  body.biz-practice .submit-row { flex-direction: column; }
}
@media (max-width: 500px) {
  body.biz-practice .tab-btn { padding: 10px 6px; }
  body.biz-practice .tab-icon { display: none; }
  body.biz-practice .domain-card { padding: 16px; }
}
html.pp-embedded-exercise body.biz-practice .main-content { padding-top: 28px !important; }