/* MCQ exams (public/js/mcq.js): admin page and teacher portal. */
.mcq { display: grid; gap: 14px; color: var(--text); }
.mcq button, .mcq input, .mcq select, .mcq textarea { font: inherit; }
.mcq h2 { margin: 0; font-size: 1.25rem; }
.mcq h3 { margin: 0 0 10px; font-size: 1.05rem; }
.mcq-sub { margin: 2px 0 0; color: var(--text-muted); font-size: 0.85em; }
.mcq-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 10px; }
.mcq-head-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.mcq-tabs { display: inline-flex; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.mcq-tabs button { border: 0; background: var(--card); color: var(--text); padding: 8px 12px; cursor: pointer; min-height: 38px; }
.mcq-tabs button + button { border-left: 1px solid var(--border); }
.mcq-tabs button.active { background: var(--primary); color: #fff; }
.mcq-confidential { margin: 0; padding: 10px 12px; border-radius: var(--radius-md); background: var(--warning-bg); color: var(--text); border-left: 4px solid var(--warning); font-size: 0.9em; }
.mcq-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px; box-shadow: var(--shadow-sm); min-width: 0; }
.mcq-msg { margin: 6px 0; color: var(--text-muted); }
.mcq-msg.error { color: var(--danger); background: var(--danger-bg); padding: 8px 10px; border-radius: var(--radius-md); }
.mcq-msg.ok { color: var(--success); }
.mcq-msg.warn { color: var(--warning); background: var(--warning-bg); padding: 8px 10px; border-radius: var(--radius-md); }
.mcq-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 38px; padding: 7px 14px;
  border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--card); color: var(--text); cursor: pointer; font-weight: 600; width: auto;
}
.mcq-btn:hover { background: var(--card-hover); }
.mcq-btn:focus-visible, .mcq-row:focus-visible, .mcq-tabs button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.mcq-btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.mcq-btn.primary:hover { background: var(--primary-hover); }
.mcq-btn.danger { color: var(--danger); border-color: var(--danger); }
.mcq-btn.small { min-height: 32px; padding: 4px 10px; font-size: 0.85em; font-weight: 500; }
.mcq-btn:disabled { opacity: 0.6; cursor: progress; }
.mcq-file { display: none; }
.mcq-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.mcq-table { width: 100%; border-collapse: collapse; font-size: 0.92em; }
.mcq-table th, .mcq-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border-light); vertical-align: middle; }
.mcq-table th { color: var(--text-muted); font-weight: 600; font-size: 0.85em; white-space: nowrap; }
.mcq-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
.mcq-table tr.muted td { color: var(--text-faint); }
.mcq-row { cursor: pointer; }
.mcq-row:hover td { background: var(--card-hover); }
.mcq-pill { display: inline-block; padding: 1px 8px; border-radius: var(--radius-pill); font-size: 0.8em; font-weight: 600; white-space: nowrap; }
.mcq-pill.ok { background: var(--success-bg); color: var(--success); }
.mcq-pill.warn { background: var(--warning-bg); color: var(--warning); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

/* Form */
.mcq-form { display: grid; gap: 14px; max-width: 860px; }
.mcq-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.mcq-field { display: grid; gap: 4px; font-weight: 600; font-size: 0.9em; }
.mcq-field small, .mcq-check small { font-weight: 400; color: var(--text-muted); }
.mcq-field small.mcq-field-error { color: var(--danger); }
.mcq-field small.mcq-field-error:empty { display: none; }
.mcq-field input, .mcq-field select, .mcq-key, .mcq-toolbar select, .mcq-toolbar input {
  width: 100%; min-height: 38px; padding: 7px 10px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--card); color: var(--text);
}
.mcq-fieldset { border: 1px solid var(--border); border-radius: var(--radius-md); padding: 10px 12px; margin: 0; min-width: 0; }
.mcq-fieldset legend { font-weight: 600; font-size: 0.9em; padding: 0 4px; }
.mcq-checks { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.mcq-radios { display: grid; gap: 6px; }
.mcq-check { display: inline-flex; align-items: flex-start; gap: 8px; cursor: pointer; min-height: 32px; padding-top: 4px; }
.mcq-check input { margin-top: 3px; width: 18px; height: 18px; }
.mcq-key { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: 0.05em; resize: vertical; }
.mcq-key-tools { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; margin-top: 6px; }
.mcq-key-note { color: var(--text-muted); }
.mcq-key-note.ok { color: var(--success); font-weight: 600; }
.mcq-key-preview { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.mcq-key-preview span { display: inline-grid; place-items: center; min-width: 30px; padding: 2px 4px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-weight: 700; font-size: 0.9em; }
.mcq-key-preview span b { font-weight: 400; font-size: 0.7em; color: var(--text-muted); }
.mcq-key-preview span.bad { border-color: var(--danger); color: var(--danger); background: var(--danger-bg); }
.mcq-actions { display: flex; flex-wrap: wrap; gap: 8px; }

/* Detail */
.mcq-title-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 8px; }
.mcq-facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 6px 0 0; }
.mcq-facts dt { color: var(--text-muted); font-size: 0.9em; }
.mcq-facts dd { margin: 0; overflow-wrap: anywhere; }
.mcq-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 10px 0; }
.mcq-toolbar select { width: auto; }
.mcq-toolbar input[type="search"] { width: auto; flex: 1 1 180px; }

@media (max-width: 640px) {
  .mcq-card { padding: 12px; }
  .mcq-facts { grid-template-columns: 1fr; gap: 2px; }
  .mcq-facts dd { margin-bottom: 6px; }
  .mcq-head-actions, .mcq-tabs { width: 100%; }
  .mcq-tabs button { flex: 1; }
  .mcq-toolbar > * { flex: 1 1 100%; }
}

/* Scanned sheets (public/js/mcq-scan.js) and the comparison (mcq-compare.js) */
.mcq-pill.info { background: var(--primary-light, var(--card-hover)); color: var(--primary); }
.mcq-pill.bad { background: var(--danger-bg); color: var(--danger); }
.mcq-pill.muted { background: var(--card-hover); color: var(--text-muted); }
.mcq-chips { display: flex; flex-wrap: wrap; gap: 6px; flex: 1 1 auto; }
.mcq-chip { border: 1px solid var(--border); background: var(--card); color: var(--text); border-radius: var(--radius-pill); padding: 5px 12px; min-height: 34px; cursor: pointer; font-size: 0.88em; }
.mcq-chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.mcq-chip:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.mcq-scan-upload .mcq-btn.busy { opacity: 0.6; pointer-events: none; }
.mcq-scan-log { margin: 8px 0; padding: 8px 8px 8px 28px; max-height: 240px; overflow-y: auto; border: 1px solid var(--border-light); border-radius: var(--radius-md); font-size: 0.86em; background: var(--bg, var(--card)); }
.mcq-scan-log li { padding: 2px 0; overflow-wrap: anywhere; }
.mcq-scan-log li.ok { color: var(--success); }
.mcq-scan-log li.warn { color: var(--warning); }
.mcq-scan-log li.bad { color: var(--danger); }
.mcq-details summary { cursor: pointer; font-weight: 600; padding: 4px 0; }
.mcq-review { max-width: none; }
.mcq-review-student p { margin: 0; }
.mcq-review-body { display: grid; grid-template-columns: minmax(0, 420px) minmax(0, 1fr); gap: 16px; align-items: start; }
.mcq-review-page { display: block; position: sticky; top: 8px; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; background: #fff; color: #111; }
.mcq-review-page img { display: block; width: 100%; height: auto; }
.mcq-review-answers { display: grid; gap: 8px; min-width: 0; }
.mcq-review-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 8px; }
.mcq-q { display: grid; gap: 6px; padding: 8px; border: 1px solid var(--border); border-radius: var(--radius-md); border-left-width: 4px; background: var(--card); }
.mcq-q.unclear { border-left-color: var(--warning); background: var(--warning-bg); }
.mcq-q.multiple { border-left-color: var(--danger); }
.mcq-q.blank { border-left-color: var(--text-faint); }
.mcq-q.corrected { border-left-color: var(--primary); }
.mcq-q-head { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.mcq-q-crop { width: 100%; max-width: 260px; height: auto; border: 1px solid var(--border-light); border-radius: var(--radius-sm); background: #fff; color: #111; }
.mcq-q-choices { display: flex; flex-wrap: wrap; gap: 4px; }
.mcq-q-choice { min-width: 40px; min-height: 36px; padding: 4px 8px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--card); color: var(--text); font-weight: 700; cursor: pointer; }
.mcq-q-choice.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.mcq-q-choice:disabled { cursor: default; opacity: 0.75; }
.mcq-q-choice:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.mcq-compare-filters { align-items: end; }
.mcq-compare-table td.diff { font-weight: 700; }
.mcq-compare-table td.diff.neg { color: var(--danger); }
.mcq-compare-table td.diff.pos { color: var(--success); }
.mcq-compare-table th.num { text-align: right; }
.mcq-caveat { margin: 0; padding: 10px 12px; border-left: 4px solid var(--warning); background: var(--warning-bg); border-radius: var(--radius-md); font-size: 0.9em; }
.mcq-pre { white-space: pre-wrap; overflow-wrap: anywhere; min-width: 180px; max-width: 320px; }
.mcq-notes { margin-top: 16px; }
.mcq-dialog { border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px; width: min(560px, calc(100vw - 32px)); background: var(--card); color: var(--text); }
.mcq-dialog::backdrop { background: rgba(0, 0, 0, 0.45); }
.mcq-dialog textarea { width: 100%; padding: 7px 10px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--card); color: var(--text); font: inherit; }

@media (max-width: 860px) {
  .mcq-review-body { grid-template-columns: 1fr; }
  .mcq-review-page { position: static; max-width: 420px; }
}
@media (max-width: 640px) {
  .mcq-review-list { grid-template-columns: 1fr; }
  .mcq-chips { width: 100%; }
}

/* Step bar, what's missing, sections, grouped form, help */
.mcq-steps { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; counter-reset: none; }
.mcq-step { flex: 1 1 130px; min-width: 0; }
.mcq-step button { width: 100%; display: flex; align-items: center; gap: 8px; text-align: left; padding: 8px 10px; min-height: 44px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--card); color: var(--text-muted); cursor: pointer; }
.mcq-step-n { flex: none; display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--border); font-weight: 700; font-size: 0.85em; }
.mcq-step-t { display: grid; font-weight: 600; font-size: 0.9em; }
.mcq-step-t small { font-weight: 400; color: var(--text-muted); font-size: 0.8em; }
.mcq-step.done button { color: var(--text); }
.mcq-step.done .mcq-step-n { background: var(--success); border-color: var(--success); color: #fff; }
.mcq-step.current button { border-color: var(--primary); color: var(--text); box-shadow: 0 0 0 1px var(--primary); }
.mcq-step.current .mcq-step-n { background: var(--primary); border-color: var(--primary); color: #fff; }
.mcq-step button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.mcq-missing { padding: 10px 14px; border-radius: var(--radius-md); background: var(--warning-bg); border-left: 4px solid var(--warning); }
.mcq-missing ul { list-style: none; margin: 6px 0 0; padding: 0; display: grid; gap: 6px; }
.mcq-missing li { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.mcq-section-tabs { display: flex; width: 100%; overflow-x: auto; }
.mcq-section-tabs button { flex: 1 1 auto; white-space: nowrap; }
.mcq-panel { display: grid; gap: 14px; min-width: 0; }
.mcq-panel[hidden], .mcq-help[hidden] { display: none; }
.mcq-help ol { list-style: none; margin: 0 0 10px; padding-left: 0; display: grid; gap: 8px; }
.mcq-group legend { font-size: 1em; }
.mcq-group { display: grid; gap: 12px; }
.mcq-group-sub { display: grid; gap: 6px; margin-top: 4px; }
.mcq-need { font-weight: 500; font-size: 0.8em; padding: 1px 8px; border-radius: var(--radius-pill); background: var(--warning-bg); color: var(--warning); }
@media (max-width: 640px) { .mcq-step { flex: 1 1 100%; } .mcq-missing li { align-items: stretch; } }
.mcq-scan-big { font-size: 1.25rem; padding: 0.9rem 2rem; font-weight: 700; }
.mcq-scan-big.busy { opacity: 0.6; pointer-events: none; }
.mcq-helper { margin: 0.5rem 0; }
.mcq-helper ol { margin: 0.4rem 0 0.4rem 1.2rem; padding: 0; }
.mcq-summary { margin: 0.75rem 0; }
.mcq-summary-line { font-size: 1.1rem; font-weight: 700; margin: 0 0 0.25rem; }
.mcq-scan-all { border-width: 2px; }
.mcq-summary-exams { margin: 0.4rem 0 0; padding-left: 1.2rem; }
.mcq-unassigned-row { display: flex; gap: 12px; align-items: flex-start; padding: 10px 0; border-top: 1px solid var(--border); }
.mcq-unassigned-row.done { opacity: 0.6; }
.mcq-thumb { width: 110px; border: 1px solid var(--border); border-radius: 4px; flex: none; }
.mcq-unassigned-row select { max-width: 100%; }