:root {
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
    font-weight: 400;
    --bg: #f4f7fb;
    --card: #ffffff;
    --text: #172033;
    --muted: #667085;
    --line: #e3e8ef;
    --primary: #2457d6;
    --primary-dark: #1943aa;
    --danger: #b42318;
    --danger-bg: #fef3f2;
    --ok: #067647;
    --ok-bg: #ecfdf3;
    --warning: #b54708;
    --warning-bg: #fffaeb;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .45; }
.hidden { display: none !important; }

.shell { width: min(960px, calc(100% - 32px)); margin: 44px auto; }
.teacher-shell { width: min(1280px, calc(100% - 32px)); margin: 36px auto 80px; }
.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: 0 10px 34px rgba(16, 24, 40, .06);
    padding: 28px;
}
.narrow { width: min(560px, 100%); margin: 8vh auto 0; }
.eyebrow { color: var(--primary); text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; font-weight: 800; }
h1 { margin: 6px 0 10px; line-height: 1.15; }
h2, h3 { margin-top: 0; }
.muted { color: var(--muted); }
.tiny { font-size: .78rem; }
.error { color: var(--danger); background: var(--danger-bg); border-radius: 10px; padding: 10px 12px; }

form { display: grid; gap: 16px; margin-top: 22px; }
label { display: grid; gap: 7px; font-weight: 650; }
input, textarea {
    width: 100%;
    border: 1px solid #cdd5df;
    border-radius: 11px;
    padding: 12px 13px;
    background: #fff;
    color: var(--text);
    outline: none;
}
input:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(36, 87, 214, .12); }

button {
    border: 0;
    border-radius: 11px;
    padding: 11px 16px;
    font-weight: 750;
}
.primary { background: var(--primary); color: #fff; }
.primary:hover { background: var(--primary-dark); }
.secondary { background: #eef2f7; color: var(--text); }
.danger { background: var(--danger); color: #fff; }
.big { padding: 14px 20px; font-size: 1.05rem; }
.notice { background: #f0f4ff; border: 1px solid #d9e2ff; border-radius: 12px; padding: 14px 16px; margin: 22px 0; }

.exam-header, .dashboard-header, .detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}
.timer-box {
    min-width: 150px;
    text-align: right;
    background: #111827;
    color: white;
    border-radius: 14px;
    padding: 10px 16px;
}
.timer-box span { display: block; opacity: .72; font-size: .75rem; }
.timer-box strong { font-size: 1.6rem; font-variant-numeric: tabular-nums; }

.progress-wrap { margin: 24px 0 14px; }
.progress-meta { display: flex; justify-content: space-between; font-size: .88rem; color: var(--muted); margin-bottom: 7px; }
.progress-bar { height: 8px; background: #e8edf3; border-radius: 999px; overflow: hidden; }
.progress-bar > div { height: 100%; background: var(--primary); transition: width .2s ease; }

.question-card { min-height: 330px; }
.question-number { color: var(--primary); font-weight: 800; margin-bottom: 12px; }
.question-prompt { font-size: 1.28rem; font-weight: 650; white-space: pre-wrap; margin-bottom: 26px; }
.answer-input { max-width: 460px; font-size: 1.06rem; }
.answer-textarea { min-height: 140px; resize: vertical; }
.options { display: grid; gap: 12px; }
.option {
    display: flex; grid-template-columns: auto 1fr; align-items: center;
    gap: 12px; border: 1px solid var(--line); border-radius: 12px; padding: 13px 15px;
    font-weight: 500; cursor: pointer;
}
.option:hover { background: #f8fafc; }
.option input { width: auto; margin: 0; }

.exam-nav { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 16px; }
.question-dots { display: flex; justify-content: center; flex-wrap: wrap; gap: 7px; }
.q-dot {
    width: 34px; height: 34px; padding: 0; background: #e8edf3; border-radius: 50%;
}
.q-dot.answered { background: #d1fadf; color: #05603a; }
.q-dot.current { outline: 3px solid rgba(36, 87, 214, .22); background: var(--primary); color: white; }
.submit-row { display: flex; justify-content: flex-end; margin-top: 28px; }

.warning-overlay {
    position: fixed; inset: 0; background: rgba(127, 29, 29, .94);
    display: grid; place-items: center; z-index: 99999; padding: 20px;
}
.warning-box {
    width: min(560px, 100%); background: white; border-radius: 20px; padding: 38px;
    text-align: center; box-shadow: 0 30px 90px rgba(0,0,0,.3);
}
.warning-icon { font-size: 4rem; }

.dashboard-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}
.pill { padding: 8px 12px; border-radius: 999px; background: #eef2f7; font-weight: 700; font-size: .84rem; }
.pill.live { background: var(--ok-bg); color: var(--ok); }
.stats-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 22px 0;
}
.stat-card {
    background: white; border: 1px solid var(--line); border-radius: 15px; padding: 18px;
}
.stat-card span { color: var(--muted); font-size: .82rem; }
.stat-card strong { display: block; font-size: 2rem; margin-top: 4px; }
.table-card { padding: 0; overflow: hidden; }
.table-head { padding: 22px 24px 10px; }
.table-head h2 { margin-bottom: 2px; }
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 14px 18px; border-top: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .04em; background: #fafbfc; }
.clickable-row { cursor: pointer; }
.clickable-row:hover { background: #f8fafc; }

.status { display: inline-block; padding: 6px 9px; border-radius: 999px; font-size: .78rem; font-weight: 800; }
.status-ok { background: var(--ok-bg); color: var(--ok); }
.status-alert { background: var(--danger-bg); color: var(--danger); }
.status-offline { background: #f2f4f7; color: #475467; }
.status-submitted { background: #eef4ff; color: #3538cd; }
.status-waiting { background: var(--warning-bg); color: var(--warning); }
.alert-count { display: inline-grid; place-items: center; min-width: 28px; height: 28px; border-radius: 50%; background: var(--danger-bg); color: var(--danger); font-weight: 850; }

.detail-card { margin-top: 18px; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; margin-top: 24px; }
.detail-question { display: flex; gap: 11px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.answer-yes { color: var(--ok); font-weight: 900; }
.answer-no { color: #98a2b3; font-weight: 900; }
.event-list { max-height: 390px; overflow: auto; }
.event-item { display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: .86rem; }

@media (max-width: 760px) {
    .exam-header, .dashboard-header, .detail-header { align-items: flex-start; flex-direction: column; }
    .timer-box { text-align: left; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .detail-grid { grid-template-columns: 1fr; }
    .exam-nav { flex-wrap: wrap; }
    .question-dots { order: 3; width: 100%; }
    .dashboard-actions { width: 100%; justify-content: flex-start; }
    .dashboard-actions > * { max-width: 100%; }
}

/* V2: diàleg d'entrega, correcció i incidències agrupades */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 100000;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgba(17, 24, 39, .72);
    backdrop-filter: blur(3px);
}
.modal-box {
    width: min(580px, 100%);
    background: #fff;
    border-radius: 20px;
    padding: 32px;
    box-shadow: 0 30px 90px rgba(0, 0, 0, .28);
}
.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 24px;
    flex-wrap: wrap;
}
.score-summary { margin: 22px 0 4px; }
.score-box {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3px 18px;
    align-items: center;
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fafbfc;
}
.score-box span { color: var(--muted); font-size: .86rem; }
.score-box strong { font-size: 1.45rem; }
.score-box small { grid-column: 1 / -1; color: var(--muted); }
.result-note {
    padding: 13px 15px;
    border-radius: 12px;
    background: #f5f7fa;
    color: var(--muted);
}
.question-small { margin: 3px 0 5px; }
.result-question {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 16px;
    margin-bottom: 12px;
    background: #fff;
}
.result-question.correct { border-left: 4px solid var(--ok); }
.result-question.incorrect { border-left: 4px solid var(--danger); }
.result-question.manual { border-left: 4px solid var(--warning); }
.result-question.unanswered { border-left: 4px solid #98a2b3; }
.result-question-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}
.result-prompt { font-weight: 650; margin-bottom: 12px; }
.result-answer, .result-correct {
    display: grid;
    gap: 3px;
    padding: 9px 11px;
    border-radius: 10px;
    background: #f8fafc;
    margin-top: 7px;
}
.result-answer span, .result-correct span { color: var(--muted); font-size: .76rem; }
.result-answer strong, .result-correct strong { white-space: pre-wrap; overflow-wrap: anywhere; }
.grade-badge {
    display: inline-block;
    padding: 5px 8px;
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 800;
    white-space: nowrap;
}
.grade-correct { background: var(--ok-bg); color: var(--ok); }
.grade-incorrect { background: var(--danger-bg); color: var(--danger); }
.grade-manual { background: var(--warning-bg); color: var(--warning); }
.grade-unanswered { background: #f2f4f7; color: #475467; }
.incident-list { display: grid; gap: 9px; }
.incident-item {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    padding: 13px 14px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #fff;
}
.incident-item.incident-open { border-color: #fda29b; background: var(--danger-bg); }
.incident-time { text-align: right; }
.incident-time strong, .incident-time span { display: block; }
.incident-time span { color: var(--muted); font-size: .76rem; }

@media (max-width: 620px) {
    .modal-actions { flex-direction: column-reverse; }
    .modal-actions button { width: 100%; }
    .result-question-head, .incident-item { align-items: flex-start; flex-direction: column; }
    .incident-time { text-align: left; }
}

/* --- v3: sales, exàmens i reconnexió --- */
.section-block { margin-top: 32px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 14px; }
.section-heading.compact { margin-bottom: 6px; }
.section-heading h2 { margin: 4px 0 0; }
.home-grid { display: grid; grid-template-columns: 1fr; gap: 18px; margin: 22px 0; }
.inline-form { grid-template-columns: minmax(220px, 2fr) minmax(110px, .7fr) minmax(110px, .7fr) auto; align-items: end; }
.inline-form button { height: 46px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(285px, 1fr)); gap: 14px; }
.item-card { display: flex; flex-direction: column; gap: 10px; min-height: 190px; }
.item-card h3 { margin: 2px 0; }
.item-card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.card-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; }
.room-code { font-size: 2rem; font-weight: 900; letter-spacing: .12em; line-height: 1; margin-top: 6px; }
.room-open { border-top: 4px solid #067647; }
.room-closed { opacity: .78; }
.empty-card { color: var(--muted); border-style: dashed; box-shadow: none; }
.text-button { padding: 0; background: transparent; color: var(--primary); margin-bottom: 10px; }
.danger-outline { background: transparent; color: var(--danger); border: 1px solid #f3b5b0; }
.danger-outline:hover { background: var(--danger-bg); }
.button-link { display: inline-block; text-decoration: none; border-radius: 11px; padding: 11px 16px; font-weight: 750; margin-top: 10px; }
.resume-list { display: grid; gap: 10px; margin-bottom: 22px; }
.resume-card { background: white; border: 1px solid var(--line); border-radius: 14px; padding: 15px 16px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.resume-card div { display: grid; gap: 3px; }
.resume-card span { color: var(--muted); font-size: .88rem; }
.connection-pill { display: inline-block; margin-top: 5px; border-radius: 999px; padding: 4px 9px; font-size: .76rem; font-weight: 800; }
.connection-pill.connected { background: var(--ok-bg); color: var(--ok); }
.connection-pill.disconnected { background: var(--danger-bg); color: var(--danger); }

@media (max-width: 820px) {
    .inline-form { grid-template-columns: 1fr 1fr; }
    .inline-form label:first-child { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
    .inline-form { grid-template-columns: 1fr; }
    .inline-form label:first-child { grid-column: auto; }
    .resume-card { align-items: stretch; flex-direction: column; }
    .resume-card button { width: 100%; }
}
.score-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 15px 17px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fafbfc;
}
.score-card span { color: var(--muted); font-size: .86rem; }
.graded-question {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 15px;
    margin-bottom: 12px;
    background: #fff;
}
.graded-head { display: flex; justify-content: space-between; gap: 12px; align-items: center; margin-bottom: 9px; }
.prompt-small { font-weight: 650; margin-bottom: 12px; }
.answer-box { margin-top: 4px; padding: 9px 11px; background: #f8fafc; border-radius: 10px; white-space: pre-wrap; overflow-wrap: anywhere; }
.correct-answer { background: #f0fdf4; }
@media (max-width: 620px) {
    .score-card, .graded-head { align-items: flex-start; flex-direction: column; }
}


/* --- v3.1: recuperació autoritzada pel professor --- */
.recovery-panel { margin-bottom: 18px; border-left: 4px solid var(--warning); }
.recovery-request-list { display: grid; gap: 10px; padding: 0 22px 22px; }
.recovery-request-item {
    display: flex; justify-content: space-between; align-items: center; gap: 16px;
    border: 1px solid #fedf89; background: var(--warning-bg); border-radius: 12px; padding: 13px 14px;
}
.recovery-actions { display: flex; gap: 8px; flex-wrap: wrap; }
@media (max-width: 620px) {
    .recovery-request-item { align-items: stretch; flex-direction: column; }
    .recovery-actions button { flex: 1; }
}

/* --- v4: banc de preguntes i importador LaTeX --- */
.bank-counter {
    min-width: 145px;
    padding: 12px 16px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: white;
    text-align: right;
}
.bank-counter strong { display: block; font-size: 1.8rem; line-height: 1; }
.bank-counter span { color: var(--muted); font-size: .78rem; }
.editor-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    margin-top: 24px;
}
.source-panel, .preview-panel { min-height: 650px; }
.editor-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.source-editor {
    min-height: 500px;
    resize: vertical;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: .92rem;
    line-height: 1.48;
    tab-size: 4;
    white-space: pre;
}
.parse-status { margin-top: 12px; font-weight: 700; }
.parse-status.parse-ok { color: var(--ok); }
.parse-status.parse-bad { color: var(--danger); }
.parse-messages { display: grid; gap: 8px; margin-top: 10px; }
.parse-message { padding: 9px 11px; border-radius: 10px; }
.import-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 14px; }
.question-preview { display: grid; gap: 14px; }
.empty-preview {
    min-height: 260px;
    border: 1px dashed var(--line);
    border-radius: 14px;
    display: grid;
    place-items: center;
    color: var(--muted);
    text-align: center;
    padding: 20px;
}
.preview-question {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px;
    background: #fff;
}
.preview-question.preview-invalid { border-color: #fda29b; background: var(--danger-bg); }
.preview-meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.preview-meta > span:last-child { margin-left: auto; color: var(--muted); font-size: .82rem; }
.pill.subtle { background: #f2f4f7; color: #475467; }
.preview-prompt, .bank-prompt { font-size: 1.03rem; line-height: 1.65; }
.preview-options, .bank-options { display: grid; gap: 8px; margin: 14px 0; }
.preview-option {
    display: grid;
    grid-template-columns: 30px 1fr;
    gap: 8px;
    padding: 9px 11px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fafbfc;
}
.preview-option.correct-option { border-color: #abefc6; background: var(--ok-bg); }
.preview-answer, .bank-answer {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
}
.preview-answer span, .bank-answer span { color: var(--muted); font-size: .78rem; margin-right: 6px; }
.bank-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 14px; }
.bank-question-card { display: flex; flex-direction: column; gap: 10px; }
.bank-question-head { display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.bank-question-head > div { display: flex; gap: 7px; flex-wrap: wrap; }
.bank-question-card .card-actions { margin-top: auto; }
.math-content mjx-container { overflow-x: auto; overflow-y: hidden; max-width: 100%; }
code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    background: #f2f4f7;
    border-radius: 5px;
    padding: 1px 5px;
}

@media (max-width: 980px) {
    .editor-grid { grid-template-columns: 1fr; }
    .source-panel, .preview-panel { min-height: auto; }
}

@media (max-width: 620px) {
    .bank-counter { text-align: left; width: 100%; }
    .source-editor { min-height: 380px; }
    .bank-list { grid-template-columns: 1fr; }
}


/* --- v4.2: correcció, qualificació i exportació --- */
.monitor-actions { flex-wrap: wrap; justify-content: flex-end; }
.grade-score { font-weight: 850; color: var(--ok); font-variant-numeric: tabular-nums; }
.score-card-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px 18px;
    align-items: center;
}
.score-card-grid > span { display: grid; gap: 2px; color: var(--muted); font-size: .82rem; }
.score-card-grid > span strong { color: var(--text); font-size: 1rem; }
.final-score { color: var(--ok) !important; font-size: 1.2rem !important; }
.pending-score { color: var(--warning) !important; }
.grading-tools { margin-top: 14px; }
.grade-editor {
    margin-top: 10px;
    padding: 14px;
    border: 1px solid #d0d5dd;
    border-radius: 12px;
    background: #fafbfc;
}
.grade-fields { display: grid; grid-template-columns: minmax(150px, .35fr) minmax(260px, 1fr); gap: 14px; align-items: start; }
.points-input-row { display: flex; align-items: center; gap: 8px; }
.points-input-row input { width: 100px; }
.points-input-row span { color: var(--muted); white-space: nowrap; }
.grade-comment { min-height: 78px; resize: vertical; }
.grade-editor-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 10px; }
.small-button { padding: 7px 10px; font-size: .82rem; }
@media (max-width: 900px) {
    .score-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grade-fields { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
    .score-card-grid { grid-template-columns: 1fr; }
    .monitor-actions { justify-content: flex-start; }
}

/* --- v5: dissenyador d'exàmens --- */
.exam-designer-callout {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}
.exam-total-box {
    min-width: 128px;
    text-align: center;
    background: #111827;
    color: #fff;
    border-radius: 16px;
    padding: 12px 18px;
}
.exam-total-box span, .exam-total-box small { display: block; opacity: .7; font-size: .75rem; }
.exam-total-box strong { display: block; font-size: 2rem; line-height: 1.05; margin: 3px 0; }
.editor-config-card { margin: 22px 0; }
.exam-config-grid {
    display: grid;
    grid-template-columns: minmax(260px, 1.2fr) minmax(150px, .45fr) minmax(300px, 1fr);
    gap: 18px;
    align-items: end;
}
.toggle-label {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 11px;
    align-items: start;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 12px 14px;
    cursor: pointer;
    background: #fafbfc;
}
.toggle-label input { width: auto; margin-top: 4px; }
.toggle-label span { display: grid; gap: 2px; }
.toggle-label small { color: var(--muted); font-weight: 400; }
.editor-selection-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(340px, .75fr);
    gap: 18px;
    align-items: start;
}
.exam-bank-filters {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(180px, .38fr);
    gap: 10px;
    margin-bottom: 14px;
}
.exam-bank-filters select {
    width: 100%;
    border: 1px solid #cdd5df;
    border-radius: 11px;
    padding: 12px 13px;
    background: #fff;
    color: var(--text);
}
.exam-question-selector {
    display: grid;
    gap: 9px;
    max-height: 660px;
    overflow: auto;
    padding-right: 4px;
}
.exam-select-question {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 12px;
    align-items: start;
    border: 1px solid var(--line);
    border-radius: 13px;
    padding: 13px;
    cursor: pointer;
    background: #fff;
    font-weight: 400;
}
.exam-select-question:hover { background: #f8fafc; }
.exam-select-question.selected { border-color: #84adff; background: #f0f4ff; }
.exam-select-question > input { width: auto; margin-top: 5px; }
.exam-select-body { min-width: 0; display: grid; gap: 7px; }
.exam-select-meta { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.exam-select-meta strong { margin-left: auto; font-size: .82rem; }
.exam-select-prompt { font-size: .9rem; color: #344054; max-height: 92px; overflow: hidden; }
.selector-empty { padding: 24px; text-align: center; }
.random-topic-list { display: grid; gap: 10px; }
.random-topic-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 120px;
    gap: 14px;
    align-items: center;
    border-bottom: 1px solid var(--line);
    padding: 10px 0;
}
.random-count-label { font-size: .76rem; color: var(--muted); gap: 4px; }
.random-count-label input { padding: 8px 9px; }
.exam-editor-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 22px 0 14px;
}
.exam-editor-summary > div {
    background: #f8fafc;
    border: 1px solid var(--line);
    border-radius: 11px;
    padding: 11px;
    text-align: center;
}
.exam-editor-summary span { display: block; color: var(--muted); font-size: .72rem; }
.exam-editor-summary strong { font-size: 1.25rem; }
.full-width { width: 100%; }

@media (max-width: 980px) {
    .editor-selection-grid { grid-template-columns: 1fr; }
    .exam-config-grid { grid-template-columns: 1fr; align-items: stretch; }
}
@media (max-width: 620px) {
    .exam-designer-callout { align-items: stretch; flex-direction: column; }
    .exam-bank-filters { grid-template-columns: 1fr; }
    .random-topic-row { grid-template-columns: 1fr; }
    .exam-total-box { width: 100%; }
}


.archive-toggle { display:flex; align-items:center; gap:.55rem; margin:.5rem 0 1rem; color:var(--muted); font-weight:600; }
.archive-toggle input { width:auto; }
.archived-card { opacity:.78; border-style:dashed; }
.inline-action { margin-left:.6rem; padding:.45rem .7rem; }
.modal-overlay { position:fixed; inset:0; z-index:10000; background:rgba(15,23,42,.55); display:grid; place-items:center; padding:20px; }
.share-modal-card { width:min(520px,100%); }
.share-modal-card select { width:100%; padding:12px; border:1px solid #cdd5df; border-radius:11px; background:white; }
.account-card { margin-top:2rem; }
.admin-create-grid { display:grid; grid-template-columns:1fr 1fr auto; gap:14px; align-items:end; }
.admin-table-card { margin-top:18px; }
@media (max-width:760px){ .admin-create-grid { grid-template-columns:1fr; } }

/* v6.1 — recursos HTML/CSS/JavaScript aïllats dins dels enunciats */
.rich-prompt { display: grid; gap: 14px; }
.htmljs-text:empty { display: none; }
.htmljs-wrap {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
}
.htmljs-frame {
    display: block;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    height: 120px;
    border: 0;
    background: #fff;
}
.htmljs-missing {
    border: 1px dashed #cbd5e1;
    border-radius: 10px;
    padding: 12px 14px;
    color: var(--muted);
    background: #f8fafc;
    font-size: .9rem;
}
.question-prompt.rich-prompt { gap: 16px; }
@media (max-width: 620px) {
    .rich-prompt { gap: 10px; }
    .question-prompt.rich-prompt { gap: 12px; }
    .htmljs-wrap { border-radius: 8px; }
    .htmljs-frame { min-height: 80px; }
}


/* v6.2 — classificació per dificultat */
.difficulty-pill { font-weight: 700; }
.difficulty-easy { background: #ecfdf3; border-color: #abefc6; color: #067647; }
.difficulty-medium { background: #fffaeb; border-color: #fedf89; color: #b54708; }
.difficulty-hard { background: #fef3f2; border-color: #fecdca; color: #b42318; }
.difficulty-unclassified { background: #f2f4f7; border-color: #d0d5dd; color: #475467; }
.difficulty-any { background: #eef4ff; border-color: #c7d7fe; color: #3538cd; }
.bank-library-filters { display:grid; grid-template-columns:minmax(220px,2fr) minmax(150px,1fr) minmax(170px,1fr); gap:10px; margin-bottom:16px; }
.bank-difficulty-editor { margin-top:12px; max-width:240px; }
.bank-difficulty-editor label { font-size:.78rem; color:var(--muted); }
.bank-difficulty-editor select { margin-top:4px; }
.exam-bank-filters { grid-template-columns:minmax(220px,2fr) minmax(150px,1fr) minmax(170px,1fr); }
.random-topic-group { border:1px solid var(--line); border-radius:12px; overflow:hidden; background:#fff; }
.random-topic-heading { padding:11px 13px; background:#f8fafc; border-bottom:1px solid var(--line); }
.random-topic-group .random-topic-row { padding:10px 13px; }
.random-topic-group .random-topic-row:last-child { border-bottom:0; }
@media (max-width:760px){
  .bank-library-filters, .exam-bank-filters { grid-template-columns:1fr; }
}

/* v6.3 — plantilla guiada, penalització i multiresposta */
.template-field-help {
    margin-top: 10px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #f8fafc;
    color: var(--muted);
    font-size: .78rem;
    display: grid;
    gap: 4px;
}
.template-field-help > div { display:grid; grid-template-columns:110px 1fr; gap:10px; align-items:baseline; }
.template-field-help code { color:#667085; background:transparent; padding:0; }
.penalty-pill { background:#fff4e5; border-color:#fed7aa; color:#9a3412; font-weight:700; }
.penalty-note {
    margin: 0 0 12px;
    padding: 9px 11px;
    border-radius: 9px;
    border: 1px solid #fed7aa;
    background: #fff7ed;
    color: #9a3412;
    font-size: .9rem;
}
.option input[type="checkbox"] { accent-color: currentColor; }
@media (max-width:620px) {
    .template-field-help > div { grid-template-columns:1fr; gap:1px; }
}

/* v6.4 — edició, selecció massiva, pools manuals i permutació de preguntes */
.bank-library-filters,
.exam-bank-filters {
    grid-template-columns: minmax(220px,2fr) minmax(145px,1fr) minmax(165px,1fr) minmax(160px,1fr);
}
.bank-bulk-toolbar {
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:12px;
    flex-wrap:wrap;
    padding:10px 12px;
    margin-bottom:12px;
    border:1px solid var(--line);
    border-radius:10px;
    background:#f8fafc;
}
.bank-question-card.bulk-selected {
    outline:2px solid #84adff;
    outline-offset:-1px;
}
.bank-select-head { display:flex; gap:12px; align-items:flex-start; flex-wrap:wrap; }
.bulk-check { display:inline-flex; gap:6px; align-items:center; font-size:.78rem; color:var(--muted); }
.bulk-check input { width:auto; margin:0; }
.tag-pill { background:#f4f3ff; border-color:#d9d6fe; color:#5925dc; }
.exam-selection-target-row {
    display:flex;
    gap:10px;
    align-items:end;
    justify-content:space-between;
    flex-wrap:wrap;
    margin-bottom:10px;
}
.exam-selection-target-row label { min-width:min(100%,280px); }
.manual-pool-list { display:grid; gap:10px; margin-bottom:16px; }
.manual-pool-empty { padding:12px; border:1px dashed var(--line); border-radius:10px; }
.manual-pool-card {
    border:1px solid var(--line);
    border-radius:12px;
    padding:12px;
    background:#fff;
}
.manual-pool-card.active-pool { border-color:#84adff; box-shadow:0 0 0 2px rgba(47,105,255,.08); }
.manual-pool-main {
    display:grid;
    grid-template-columns:minmax(170px,1fr) minmax(120px,150px) auto;
    gap:10px;
    align-items:end;
}
.manual-pool-stats { color:var(--muted); font-size:.82rem; padding-bottom:10px; }
.section-subheading { margin:16px 0 8px; color:var(--muted); font-size:.86rem; }
.exam-composition-summary {
    margin-top:14px;
    padding:11px 13px;
    border:1px solid var(--line);
    border-radius:10px;
    background:#f8fafc;
    font-size:.84rem;
}
.exam-composition-summary ul { margin:6px 0 0 18px; padding:0; }
.exam-editor-summary { grid-template-columns:repeat(4,minmax(0,1fr)); }
@media (max-width:760px) {
    .bank-library-filters, .exam-bank-filters { grid-template-columns:1fr; }
    .manual-pool-main { grid-template-columns:1fr; }
    .manual-pool-stats { padding-bottom:0; }
    .exam-editor-summary { grid-template-columns:repeat(2,minmax(0,1fr)); }
}

/* v6.5 — navegació seqüencial, resposta en blanc i temps extra */
.clear-answer-button {
    margin-top: 12px;
    width: fit-content;
}
.sequential-warning {
    border-color: #f7c873;
    background: #fff8e8;
    color: #7a4b00;
}
.sequential-nav-note {
    margin-top: 10px;
    text-align: center;
    color: #7a4b00;
    font-size: .88rem;
    font-weight: 650;
}
.q-dot:disabled {
    cursor: default;
    opacity: .65;
}
.q-dot.locked {
    background: #edf0f4;
    color: #667085;
}
.q-dot.future {
    background: #f5f7fa;
    color: #98a2b3;
}
.student-time-cell {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    white-space: nowrap;
}
.extra-time-badge {
    display: inline-flex;
    padding: 2px 7px;
    border-radius: 999px;
    background: #ecfdf3;
    color: #027a48;
    font-size: .72rem;
    font-weight: 800;
}
button.compact {
    padding: 5px 8px;
    font-size: .78rem;
}
.extra-time-button {
    margin-top: 2px;
}
@media (max-width: 700px) {
    .student-time-cell { min-width: 92px; }
}


/* v6.5.1 — Markdown bàsic segur dins dels enunciats i opcions */
.markdown-content strong { font-weight: 850; }
.markdown-content em { font-style: italic; }
.markdown-content code {
    font-size: .92em;
    white-space: break-spaces;
}
.markdown-content .md-line { min-width: 0; }
.markdown-content .md-gap { height: .65em; }
.markdown-content ul,
.markdown-content ol {
    margin: .35em 0 .55em 1.6em;
    padding: 0;
}
.markdown-content li { margin: .18em 0; }

/* v7.0.1 · previsualització fidel de l'alumne */
.preview-professor-notice { margin-bottom: 18px; }
.preview-feedback-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--card);
    font-size: .9rem;
    cursor: pointer;
}
.preview-feedback-toggle input { width: auto; margin: 0; }
.preview-student-card { margin-bottom: 18px; }
.preview-correction {
    margin-top: 18px;
    padding: 13px 15px;
    border-radius: 12px;
    display: flex;
    gap: 10px 18px;
    align-items: center;
    flex-wrap: wrap;
    border: 1px solid var(--line);
}
.preview-correction.correct { background: var(--ok-bg); color: var(--ok); border-color: #abefc6; }
.preview-correction.incorrect { background: var(--danger-bg); color: var(--danger); border-color: #fda29b; }
.preview-correction.partial { background: #fffaeb; color: #b54708; border-color: #fedf89; }
.preview-correction.manual, .preview-correction.unanswered { background: #f8fafc; color: var(--muted); }
.preview-check-button { margin-top: 12px; }
.q-dot.preview-correct-dot:not(.current) { background: #d1fadf; color: #05603a; }
.q-dot.preview-wrong-dot:not(.current) { background: #fee4e2; color: #b42318; }