.mock-exam-shell { padding-bottom: 60px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.mock-hero { padding: 70px 0 40px; }
.mock-hero h1 { margin-bottom: 16px; }
.mock-panel {
  margin: 0 0 28px;
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(17, 28, 45, 0.9);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.18);
}
.panel-heading,
.exam-toolbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.panel-heading h2,
.exam-toolbar h2 { margin: 0; font-size: clamp(1.4rem, 3vw, 2.1rem); }
.panel-kicker { margin: 0 0 4px; color: var(--accent); font-size: 0.78rem; font-weight: 900; letter-spacing: 0.12em; }
.status-pill { padding: 5px 10px; border: 1px solid rgba(103, 232, 249, 0.3); border-radius: 999px; color: #c8f7ff; font-size: 0.8rem; white-space: nowrap; }
.status-pill.is-ready { border-color: rgba(74, 222, 128, 0.45); color: #bbf7d0; }
.status-pill.is-warning { border-color: rgba(250, 204, 21, 0.5); color: #fef08a; }
.status-pill.is-error { border-color: rgba(248, 113, 113, 0.55); color: #fecaca; }
.setup-form { margin-top: 28px; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.field { display: grid; gap: 8px; color: var(--muted); font-weight: 700; }
.field select {
  width: 100%; min-height: 48px; padding: 10px 12px; border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 10px; background: #0d1728; color: var(--text); font: inherit;
}
.field select:focus-visible,
.source-choice:has(input:focus-visible) { outline: 3px solid rgba(103, 232, 249, 0.34); outline-offset: 2px; }
.source-fieldset { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 26px 0 0; padding: 0; border: 0; }
.source-fieldset legend { margin-bottom: 10px; color: var(--muted); font-weight: 800; }
.source-choice { display: flex; align-items: flex-start; gap: 10px; min-height: 78px; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: rgba(22, 38, 59, 0.62); cursor: pointer; }
.source-choice:has(input:checked) { border-color: rgba(103, 232, 249, 0.7); background: rgba(14, 116, 144, 0.2); }
.source-choice input { margin-top: 4px; accent-color: var(--accent-strong); }
.source-choice span { display: grid; gap: 3px; }
.source-choice small { color: var(--muted); font-weight: 400; line-height: 1.45; }
.form-hint { min-height: 1.8em; margin: 20px 0 6px; color: #c8f7ff; }
.practice-note { margin: 0 0 22px; color: var(--muted); font-size: 0.86rem; }
.primary-button,
.secondary-button { min-height: 46px; padding: 9px 16px; border-radius: 10px; font: inherit; font-weight: 800; cursor: pointer; }
.primary-button { border: 1px solid rgba(103, 232, 249, 0.55); background: linear-gradient(135deg, #0891b2, #2563eb); color: white; }
.primary-button:hover:not(:disabled),
.primary-button:focus-visible { filter: brightness(1.12); transform: translateY(-1px); }
.secondary-button { border: 1px solid rgba(148, 163, 184, 0.32); background: rgba(22, 38, 59, 0.8); color: var(--text); }
.secondary-button:hover:not(:disabled),
.secondary-button:focus-visible { border-color: var(--accent); background: rgba(30, 52, 78, 0.9); }
.primary-button:disabled,
.secondary-button:disabled { cursor: not-allowed; opacity: 0.48; }
.exam-progress { display: grid; gap: 2px; text-align: right; color: var(--muted); font-size: 0.86rem; }
.exam-progress strong { color: var(--text); font-size: 1rem; }
.exam-progress-track { margin: 24px 0 28px; }
.question-card { min-height: 340px; padding: clamp(20px, 4vw, 34px); border: 1px solid rgba(103, 232, 249, 0.25); border-radius: 14px; background: rgba(11, 18, 32, 0.58); }
.question-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 0.84rem; }
.question-meta span { padding: 3px 9px; border: 1px solid var(--line); border-radius: 999px; }
.question-stem { margin: 0 0 24px; color: #f8fbff; font-size: clamp(1.12rem, 2.3vw, 1.42rem); font-weight: 800; line-height: 1.7; }
.choice-list { display: grid; gap: 12px; margin: 0; padding: 0; border: 0; }
.choice-label { display: grid; grid-template-columns: 1.1rem max-content minmax(0, 1fr); align-items: start; column-gap: 6px; padding: 14px 16px; border: 1px solid rgba(148, 163, 184, 0.28); border-radius: 12px; background: rgba(22, 38, 59, 0.58); cursor: pointer; line-height: 1.65; }
.choice-label:hover { border-color: rgba(103, 232, 249, 0.55); }
.choice-label:has(input:checked) { border-color: var(--accent); background: rgba(14, 116, 144, 0.25); }
.choice-label input { width: 1rem; height: 1rem; margin: 0.35rem 0 0; accent-color: var(--accent-strong); }
.choice-key { color: var(--accent); font-weight: 900; }
.choice-label > span:last-child { min-width: 0; overflow-wrap: anywhere; }
.exam-navigation { display: flex; align-items: center; gap: 10px; margin-top: 22px; }
.submit-button { margin-left: auto; }
.score-summary { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 26px 0 32px; }
.score-card { padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: rgba(22, 38, 59, 0.62); }
.score-card strong { display: block; color: #f8fbff; font-size: clamp(1.4rem, 3vw, 2rem); line-height: 1.2; }
.score-card span { color: var(--muted); font-size: 0.85rem; }
.review-list { display: grid; gap: 16px; }
.review-item { padding: 20px; border: 1px solid var(--line); border-left: 4px solid rgba(148, 163, 184, 0.45); border-radius: 12px; background: rgba(22, 38, 59, 0.5); }
.review-item.is-correct { border-left-color: #4ade80; }
.review-item.is-wrong { border-left-color: #fb7185; }
.review-item.is-unanswered { border-left-color: #fbbf24; }
.review-label { margin: 0 0 8px; font-weight: 900; }
.review-item.is-correct .review-label { color: #bbf7d0; }
.review-item.is-wrong .review-label { color: #fecdd3; }
.review-item.is-unanswered .review-label { color: #fde68a; }
.review-question { margin: 0 0 12px; color: #f8fbff; font-weight: 750; line-height: 1.65; }
.review-answer { margin: 5px 0; color: var(--muted); }
.review-answer strong { color: var(--text); }
.review-explanation { margin: 14px 0 0; padding-top: 12px; border-top: 1px solid var(--line); color: #dbeafe; line-height: 1.7; }
.review-source { margin: 12px 0 0; color: var(--muted); font-size: 0.84rem; }

@media (max-width: 720px) {
  .source-fieldset { grid-template-columns: 1fr; }
  .score-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .mock-hero { padding-top: 48px; }
  .field-grid { grid-template-columns: 1fr; }
  .panel-heading, .exam-toolbar { flex-direction: column; }
  .exam-progress { text-align: left; }
  .exam-navigation { flex-wrap: wrap; }
  .submit-button { width: 100%; margin-left: 0; order: -1; }
  .exam-navigation .secondary-button { flex: 1 1 140px; }
}