/* Calculatrice de triangle : styles propres à l'outil. */
.o-triangle [hidden] { display: none !important; }
.o-triangle-haut { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 10px 16px; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--bord); }
.o-triangle-onglets { display: flex; flex-wrap: wrap; gap: 8px; flex: 1 1 420px; }
.o-triangle-onglets .btn { flex: 1 1 auto; min-height: 44px; font-size: 1rem; font-weight: 600; }
.atelier .o-triangle-onglets .btn[aria-selected="true"] { background: var(--marque); border-color: var(--marque); color: var(--sur-marque); }
.o-triangle-unite label { display: flex; flex-direction: column; gap: 4px; font-size: .88rem; color: var(--texte-2); }
.o-triangle-note { margin: 0 0 12px; color: var(--texte-2); font-size: .9rem; }

.o-triangle-champs { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px 16px; }
.o-triangle-six { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.o-triangle-champs label { display: flex; flex-direction: column; justify-content: flex-end; gap: 4px; font-size: .88rem; color: var(--texte-2); min-width: 0; }
.o-triangle input[type="text"] { font: 600 1.05rem var(--mono); min-width: 0; width: 100%; box-sizing: border-box; }
.o-triangle select { min-width: 8em; }
.o-triangle input[aria-invalid="true"] { border-color: var(--erreur-texte); outline: 1px solid var(--erreur-texte); }
.o-triangle input:focus-visible, .o-triangle select:focus-visible, .o-triangle .btn:focus-visible { outline: 3px solid var(--marque); outline-offset: 1px; }
.o-triangle-volet .prereglages { margin-top: 14px; }

.o-triangle .o-triangle-erreur { margin: 14px 0 0; color: var(--erreur-texte); font-size: 1rem; }
.o-triangle .o-triangle-erreur:empty { display: none; }
.o-triangle-grille { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 400px); gap: 16px; align-items: start; margin-top: 16px; }
.o-triangle-resultat { display: block; min-width: 0; }
.o-triangle-resultat dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 18px; margin: 0 0 12px; padding: 14px 16px; border-radius: var(--rayon-petit); background: var(--ok-fond); color: var(--ok-texte); }
.o-triangle-resultat dd { margin: 0; text-align: right; font: 600 1rem var(--mono); overflow-wrap: anywhere; }
.o-triangle-resultat .o-triangle-fort { font-weight: 700; }
.o-triangle-resultat dd.o-triangle-fort { font-size: 1.12rem; }
.o-triangle-sol { margin: 4px 0 6px; font-weight: 700; }
.o-triangle-avis { margin: 0 0 12px; padding: 8px 12px; border-left: 4px solid var(--marque); border-radius: var(--rayon-petit); background: var(--surface-2); font-size: .92rem; }

.o-triangle-schema { margin: 0; padding: 10px; border-radius: var(--rayon-petit); background: var(--surface-2); }
.o-triangle-schema svg { display: block; width: 100%; height: auto; }
.o-triangle-schema figcaption { margin-top: 6px; font-size: .82rem; color: var(--texte-2); }
.o-triangle-tri { fill: var(--surface); stroke: var(--marque); stroke-width: 2.5; stroke-linejoin: round; }
.o-triangle-tri2 { fill: none; stroke: var(--texte-2); stroke-dasharray: 6 5; stroke-width: 2; }
.o-triangle-droit { fill: none; stroke: var(--texte-2); stroke-width: 1.5; }
.o-triangle-som { font: 700 12px var(--police); fill: var(--marque-fort); }
.o-triangle-cote { font: 600 12px var(--police); fill: var(--texte); }
.o-triangle-vide { font: 14px var(--police); fill: var(--texte-2); text-anchor: middle; }

.o-triangle-calcul { margin-top: 14px; padding: 12px 14px; border-radius: var(--rayon-petit); background: var(--surface-2); }
.o-triangle-calcul strong { display: block; margin-bottom: 4px; font-size: .88rem; font-weight: 600; color: var(--texte-2); }
.o-triangle-formules { margin: 0; padding-left: 1.4em; font: 500 .9rem/1.7 var(--mono); overflow-wrap: anywhere; }
.o-triangle-formules:empty::after { content: "—"; }
.o-triangle-pied { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--bord); }
.o-triangle-pied .o-triangle-note { margin: 0; flex: 1 1 220px; }

@media (max-width: 820px) {
  .o-triangle-grille { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .o-triangle-onglets .btn { flex: 1 1 100%; font-size: .95rem; }
  .o-triangle-six { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .o-triangle-resultat dl { grid-template-columns: 1fr; gap: 2px; }
  .o-triangle-resultat dd { text-align: left; margin-bottom: 8px; }
}
@media (prefers-reduced-motion: reduce) { .o-triangle * { transition: none !important; } }