/* Exercices interactifs - Premiere STMG */
.exercise-page {
  --exercise: #246453;
  --exercise-dark: #19493c;
  --exercise-soft: #e8f3ee;
  --exercise-line: #cfe2d8;
  --success: #1e6d50;
  --success-soft: #edf8f3;
  --error: #a53c42;
  --error-soft: #fff2f2;
}

.exercise-page .eyebrow,
.exercise-page .title-dot,
.exercise-page .check summary,
.exercise-page .exercise-links a {
  color: var(--exercise);
}

.interactive-exercise-page {
  padding-block: 28px 64px;
}

.exercise-heading {
  max-width: 980px;
  margin-bottom: 26px;
}

.exercise-progress {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: white;
  padding: 18px 20px 16px;
  margin-bottom: 24px;
}

.exercise-progress-top {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 13px;
}

.score-chip {
  flex: 0 0 auto;
  border: 1px solid var(--exercise-line);
  background: var(--exercise-soft);
  color: var(--exercise-dark);
  border-radius: 999px;
  padding: 5px 10px;
  font-weight: 750;
}

.progress-track {
  height: 7px;
  overflow: hidden;
  border-radius: 999px;
  background: #ece9ef;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--exercise);
  transition: width .2s ease;
}

.exercise-stepper {
  display: grid;
  grid-template-columns: repeat(var(--exercise-steps, 9), minmax(42px, 1fr));
  gap: 8px;
  margin-top: 16px;
}

.exercise-stepper button {
  min-height: 44px;
  border: 1px solid #d7d3dd;
  border-radius: 10px;
  background: white;
  color: var(--ink);
  font-weight: 750;
  transition: background .15s, border-color .15s, color .15s;
}

.exercise-stepper button:hover {
  border-color: #9ebfaf;
}

.exercise-stepper button.is-active {
  background: var(--exercise);
  border-color: var(--exercise);
  color: white;
}

.exercise-stepper button.is-complete:not(.is-active) {
  background: var(--exercise-soft);
  border-color: #a8cdbb;
  color: var(--exercise-dark);
}

.exercise-stepper button.is-complete::after {
  content: " ✓";
  font-size: .85em;
}

.exercise-stage {
  min-height: 520px;
}

.exercise-block {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: white;
  overflow: hidden;
}

.exercise-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, .92fr);
  align-items: stretch;
}

.exercise-statement,
.exercise-form {
  min-width: 0;
  padding: clamp(24px, 3vw, 38px);
}

.exercise-statement {
  border-right: 1px solid var(--line);
  background: #fff;
  font-size: 16px;
  line-height: 1.78;
}

.exercise-form {
  background: #fafbf9;
}

.exercise-form > h3 {
  margin: 0 0 18px;
  font-size: 17px;
}

.exercise-head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 22px;
}

.exercise-number {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--exercise-soft);
  color: var(--exercise-dark);
  font-size: 12px;
  font-weight: 850;
}

.exercise-head h2 {
  margin: 2px 0 0 !important;
  font-size: clamp(23px, 2.7vw, 31px) !important;
  line-height: 1.2;
  letter-spacing: -.5px;
}

.exercise-kicker {
  margin: 0 !important;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: .7px;
  text-transform: uppercase;
}

.exercise-statement > p {
  margin: 12px 0;
}

.exercise-statement ol {
  padding-left: 22px;
  margin: 18px 0;
}

.exercise-statement li + li {
  margin-top: 8px;
}

.exercise-page .formula {
  border-left-color: var(--exercise);
  background: #f0f7f3;
}

.exercise-graph {
  margin: 18px 0 0;
}

.exercise-graph svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 330px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fcfdfc;
}

.hint {
  border: 1px dashed #bfb8ca;
  border-radius: 10px;
  padding: 0 15px;
  margin: 20px 0 0;
  background: #fbfafc;
}

.hint summary {
  cursor: pointer;
  padding: 12px 0;
  font-weight: 700;
  color: #595462;
}

.hint p {
  margin: 0 0 14px;
}

.answer-grid {
  display: grid;
  gap: 12px;
}

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

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

.answer-row {
  position: relative;
  display: grid;
  gap: 7px;
  min-width: 0;
  margin-bottom: 14px;
  padding: 12px;
  border: 1px solid #dad6df;
  border-radius: 11px;
  background: white;
  transition: border-color .15s, background .15s;
}

.answer-row > span:first-child {
  font-size: 12px;
  font-weight: 700;
  color: #575361;
}

.answer-row input,
.answer-row select {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  border: 1px solid #aaa5b2;
  border-radius: 8px;
  background: white;
  color: var(--ink);
  padding: 9px 10px;
  font: inherit;
  font-size: 16px;
}

.answer-row input:focus-visible,
.answer-row select:focus-visible {
  outline: 3px solid #a9d2bf;
  outline-offset: 2px;
  border-color: var(--exercise);
}

.answer-row.is-correct {
  border-color: #90c8ad;
  background: var(--success-soft);
}

.answer-row.is-wrong {
  border-color: #e1a6aa;
  background: var(--error-soft);
}

/* La couleur indique la justesse de la réponse AVANT la révélation.
   Les champs contiennent désormais les bonnes réponses du corrigé. */
.answer-row.is-revealed.was-correct {
  border-color: #79b99b;
  background: var(--success-soft);
}

.answer-row.is-revealed.was-wrong {
  border-color: #dda0a3;
  background: var(--error-soft);
}

.answer-row.is-revealed input.answer-was-correct,
.answer-row.is-revealed select.answer-was-correct {
  border: 2px solid var(--success);
  background: #e3f5ea;
  color: #13523a;
  font-weight: 800;
}

.answer-row.is-revealed input.answer-was-wrong,
.answer-row.is-revealed select.answer-was-wrong {
  border: 2px solid var(--error);
  background: #ffe5e5;
  color: #81262d;
  font-weight: 800;
}

.answer-row.is-revealed input[readonly],
.answer-row.is-revealed select:disabled {
  opacity: 1;
  cursor: default;
  -webkit-text-fill-color: currentColor;
}

.answer-row.is-revealed.was-correct .answer-status {
  color: var(--success);
}

.answer-row.is-revealed.was-wrong .answer-status {
  color: var(--error);
}

.correction-legend {
  margin: 13px 0 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 18px;
  color: var(--muted);
  font-size: 12px;
}

.correction-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.correction-legend .legend-dot {
  width: 10px;
  height: 10px;
  display: inline-block;
  border-radius: 50%;
  background: var(--success);
}

.correction-legend .legend-dot.wrong {
  background: var(--error);
}

.answer-status {
  min-height: 18px;
  font-size: 11px;
  font-weight: 750;
}

.answer-row.is-correct .answer-status {
  color: var(--success);
}

.answer-row.is-wrong .answer-status {
  color: var(--error);
}

.formula-builder,
.interval-builder {
  grid-template-columns: auto minmax(68px, 1fr) auto minmax(68px, 1fr) auto;
  align-items: center;
}

.formula-builder > span,
.interval-builder > span {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  color: var(--ink) !important;
}

.formula-builder .answer-status,
.interval-builder .answer-status {
  grid-column: 1 / -1;
}

.interval-builder {
  grid-template-columns: minmax(90px, 1fr) auto minmax(90px, 1fr);
}

.exercise-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.exercise-actions .button {
  min-height: 44px;
}

.exercise-page .button-primary {
  background: var(--exercise);
  border-color: var(--exercise);
  box-shadow: none;
}

.exercise-page .button-primary:hover {
  background: var(--exercise-dark);
}

.exercise-page .button-secondary {
  background: white;
  color: var(--ink);
  border: 1px solid #c7c2cc;
}

.exercise-page .button-secondary:hover {
  border-color: #9f99a8;
}

.exercise-page .button:disabled {
  cursor: not-allowed;
  opacity: .45;
}

.exercise-feedback {
  min-height: 23px;
  margin: 12px 0 0;
  color: var(--exercise-dark);
  font-size: 13px;
  font-weight: 700;
}

.exercise-page .check {
  border-color: var(--exercise-line);
  background: white;
  margin: 16px 0 0;
}

.exercise-page .check summary {
  font-weight: 750;
}

.exercise-linear-nav {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  margin: 20px 0 28px;
}

.nav-help {
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.exercise-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
  font-size: 13px;
  font-weight: 650;
}

.exercise-links a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.exercise-page .catalog-notice {
  margin: 18px 0;
}

@media (max-width: 900px) {
  .exercise-workspace {
    grid-template-columns: minmax(0, 1fr);
  }

  .exercise-statement {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .exercise-stage {
    min-height: 0;
  }
}

@media (max-width: 680px) {
  .interactive-exercise-page {
    padding-top: 20px;
  }

  .exercise-progress {
    padding: 15px;
  }

  .exercise-stepper {
    display: flex;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }

  .exercise-stepper button {
    flex: 0 0 48px;
  }

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

  .exercise-linear-nav {
    grid-template-columns: 1fr 1fr;
  }

  .exercise-linear-nav .button {
    width: 100%;
  }

  .nav-help {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

@media (max-width: 460px) {
  .exercise-statement,
  .exercise-form {
    padding: 22px 16px;
  }

  .exercise-progress-top {
    align-items: flex-start;
  }

  .formula-builder {
    grid-template-columns: auto minmax(58px, 1fr) auto minmax(58px, 1fr) auto;
  }

  .interval-builder {
    grid-template-columns: minmax(76px, 1fr) auto minmax(76px, 1fr);
  }

  .exercise-linear-nav {
    grid-template-columns: minmax(0, 1fr);
  }

  .nav-help {
    grid-column: auto;
    grid-row: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .progress-track span,
  .exercise-stepper button,
  .answer-row {
    transition: none;
  }
}

@media print {
  .exercise-progress,
  .exercise-linear-nav,
  .exercise-actions,
  .exercise-links,
  .hint,
  .site-header,
  .site-footer,
  .breadcrumb {
    display: none !important;
  }

  .exercise-block[hidden] {
    display: block !important;
  }

  .exercise-block {
    break-inside: avoid;
    margin-bottom: 18px;
  }

  .exercise-workspace {
    display: block;
  }

  .exercise-statement {
    border: 0;
  }

  .exercise-form {
    border-top: 1px solid #ccc;
  }
}
.exercise-category-nav { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 28px; }
.exercise-category-nav a { display: inline-flex; align-items: center; border: 1px solid #c5dcd0; padding: 10px 15px; min-height: 44px; border-radius: 999px; background: var(--exercise-soft); font-size: 12px; font-weight: 750; color: var(--exercise-dark); }
.exercise-category-nav a:hover { border-color: var(--exercise); }
.exercise-page .lesson-card:hover { border-color: var(--exercise); }
.exercise-page .lesson-card .course-code, .exercise-page .lesson-card .read-link { color: var(--exercise); }

/* Répétition procédurale : la validation reste visible jusqu'au nouveau tirage. */
.exercise-page .variant-refresh {
  min-height: 44px;
  border: 2px solid #1f7257;
  border-radius: 10px;
  background: #e4f4eb;
  color: #164c39;
  font-size: 13px;
  font-weight: 800;
  padding: 10px 16px;
}
.exercise-page .variant-refresh:hover,
.exercise-page .variant-refresh:focus-visible {
  background: #d3eede;
  border-color: #164c39;
}
.exercise-page .variant-graph {
  display: block;
  width: 100%;
  height: auto;
  max-height: 330px;
  margin-block: 18px 8px;
  border: 1px solid #d4e4dc;
  border-radius: 12px;
  background: #fbfdfc;
}
.exercise-page .exercise-feedback {
  min-height: 26px;
  line-height: 1.65;
}
@media print {
  .variant-refresh { display: none !important; }
}

/* Prototype pédagogique du chapitre Fonctions uniquement. */
.coaching-panel { margin-top: 20px; padding: 18px; border: 1px solid #b9d8cc; border-radius: 14px; background: #f1f8f4; }
.coaching-panel h3 { margin: 0 0 8px; color: #17543f; font-size: 17px; }
.coaching-panel > p { margin: 0 0 12px; line-height: 1.6; }
.coaching-hint, .coaching-bridge { margin: 9px 0; padding: 11px 13px; background: #fff; border: 1px solid #c4d9cf; border-radius: 10px; }
.coaching-hint summary, .coaching-bridge summary { cursor: pointer; font-weight: 750; color: #174e3b; }
.coaching-hint p, .coaching-bridge p { margin: 10px 0 0; line-height: 1.65; }
.coaching-diagnosis { padding: 11px; border-left: 4px solid #ae7022; background: #fff5e7; color: #71470d; }
.coaching-bridge-answer { display: block; width: 100%; min-height: 44px; margin: 10px 0; padding: 10px; border: 2px solid #769e8a; border-radius: 8px; font: inherit; }
.coaching-bridge-answer:focus-visible { outline: 3px solid #17543f; outline-offset: 2px; }
.coaching-bridge .is-success { color: #145c40; font-weight: 750; }
@media print { .coaching-panel { display: none !important; } }