/* Équation du second degré : styles propres à l'outil. */
.o-second-degre-modes { display: flex; flex-wrap: wrap; gap: 8px; }
.o-second-degre-modes .btn { min-height: 42px; border-radius: 999px; font-weight: 600; }
.atelier .o-second-degre-modes .btn[aria-pressed="true"] { background: var(--marque); border-color: var(--marque); color: var(--sur-marque); }
.o-second-degre-coefs { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: center; gap: 10px 10px; padding: 16px 0 4px; }
.o-second-degre-coef { display: flex; flex-direction: column; align-items: center; gap: 2px; font: 600 .95rem var(--mono); color: var(--texte-2); }
.o-second-degre-coef input { width: 104px; min-height: 48px; padding-inline: 6px; text-align: center; font: 600 1.25rem var(--mono); color: var(--texte); }
.o-second-degre-x { padding-bottom: 10px; font: 700 1.3rem var(--mono); white-space: nowrap; }
.o-second-degre-aide { margin: 10px 0; color: var(--texte-2); font-size: .92rem; }
.o-second-degre-champ { display: flex; flex-direction: column; gap: 4px; margin-top: 14px; font-size: .88rem; color: var(--texte-2); }
.o-second-degre-champ input { min-height: 48px; font: 600 1.25rem var(--mono); color: var(--texte); }
.o-second-degre-case { display: inline-flex; align-items: center; gap: 8px; min-height: 42px; cursor: pointer; }
.o-second-degre-case input { width: 20px; height: 20px; accent-color: var(--marque); }
.o-second-degre input[aria-invalid="true"] { border-color: var(--erreur-texte); outline: 1px solid var(--erreur-texte); }
.o-second-degre input[type="text"]:focus-visible { outline: 3px solid var(--marque); outline-offset: 0; }
.o-second-degre .o-second-degre-erreur { margin: 10px 0 0; color: var(--erreur-texte); font-size: 1rem; }
.o-second-degre .o-second-degre-erreur:empty { display: none; }

/* Écriture mathématique */
.o-second-degre-expr { display: inline-flex; flex-wrap: wrap; align-items: center; gap: .3em .4em; max-width: 100%; vertical-align: middle; }
.o-second-degre-expr > span { overflow-wrap: anywhere; }
.o-second-degre-nb { display: inline-flex; align-items: center; white-space: nowrap; }
.o-second-degre-f { display: inline-flex; flex-direction: column; align-items: center; line-height: 1.15; font-size: .92em; text-align: center; }
.o-second-degre-f > span { padding: 0 .2em; }
.o-second-degre-f > .o-second-degre-den { align-self: stretch; border-top: 2px solid currentColor; }
.o-second-degre-op { font-weight: 700; }

.o-second-degre-resultat { display: flex; flex-direction: column; gap: 6px; margin-top: 12px; padding: 12px 14px; border-radius: var(--rayon-petit); background: var(--ok-fond); color: var(--ok-texte); }
.o-second-degre-resultat > span { font-size: .85rem; font-weight: 600; }
.o-second-degre-resultat > .o-second-degre-mention { font-size: 1rem; }
.o-second-degre-resultat > .o-second-degre-mention:empty { display: none; }
.o-second-degre-resultat output { font: 700 1.4rem/1.4 var(--mono); overflow-wrap: anywhere; }
.o-second-degre-resultat dl { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px 18px; margin: 6px 0 0; }
.o-second-degre-resultat dl:empty { display: none; }
.o-second-degre-resultat dt { font-size: .8rem; font-weight: 600; }
.o-second-degre-resultat dd { margin: 2px 0 0; font: 600 1.05rem var(--mono); overflow-wrap: anywhere; }

.o-second-degre-graphe { margin: 12px 0 0; padding: 10px; border: 1px solid var(--bord); border-radius: var(--rayon-petit); background: var(--surface); }
.o-second-degre-graphe figcaption { margin-bottom: 6px; font-size: .88rem; font-weight: 600; color: var(--texte-2); }
.o-second-degre-graphe [data-graphe] { width: 100%; }
.o-second-degre-svg { display: block; max-width: 100%; height: auto; margin-inline: auto; font: 12px var(--police); }
.o-second-degre-grille line { stroke: var(--bord); stroke-width: 1; }
.o-second-degre-etiq text { fill: var(--texte-2); }
.o-second-degre-axes line { stroke: var(--texte-2); stroke-width: 1.5; }
.o-second-degre-courbe { fill: none; stroke: var(--marque); stroke-width: 3; stroke-linejoin: round; }
.o-second-degre-racine { fill: var(--erreur-texte); stroke: var(--surface); stroke-width: 2; }
.o-second-degre-sommet { fill: var(--ok-texte); stroke: var(--surface); stroke-width: 2; }
.o-second-degre-lib { fill: var(--texte); font-weight: 700; paint-order: stroke; stroke: var(--surface); stroke-width: 3px; }

.o-second-degre-calcul { margin-top: 12px; padding: 12px 14px; border-radius: var(--rayon-petit); background: var(--surface-2); }
.o-second-degre-calcul > strong { display: block; margin-bottom: 6px; font-size: .88rem; font-weight: 600; color: var(--texte-2); }
.o-second-degre-calcul ol { margin: 0; padding-left: 1.5em; }
.o-second-degre-calcul li { margin-bottom: 10px; }
.o-second-degre-calcul li p { margin: 0 0 4px; font-size: .95rem; }
.o-second-degre-calcul li .o-second-degre-expr { display: flex; margin: 2px 0 6px; font: 600 1.05rem/1.4 var(--mono); }
.o-second-degre-defile { overflow-x: auto; }
.o-second-degre-signes { border-collapse: collapse; font: 600 1rem var(--mono); background: var(--surface); }
.o-second-degre-signes th, .o-second-degre-signes td { padding: 6px 10px; border: 1px solid var(--bord); text-align: center; white-space: nowrap; }
.o-second-degre-signes th { font-family: var(--police); font-size: .9rem; text-align: left; }
.o-second-degre-signes td.intervalle { min-width: 3em; }
.o-second-degre-signes td.zero { color: var(--erreur-texte); }
.o-second-degre-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 14px 0; }
.o-second-degre-actions .btn-outline { min-height: 42px; }
.o-second-degre .prereglages .btn { font-family: var(--mono); }
.o-second-degre .o-second-degre-prive { display: block; margin-top: 16px; }
@media (max-width: 640px) {
  .o-second-degre-modes .btn { flex: 1 1 auto; padding-inline: 12px; }
  .o-second-degre-coef input { width: 76px; font-size: 1.1rem; }
  .o-second-degre-x { font-size: 1.1rem; }
  .o-second-degre-resultat output { font-size: 1.2rem; }
  .o-second-degre-resultat dl { grid-template-columns: 1fr; }
}