* { box-sizing: border-box; }
body { margin: 0; background: var(--calc-fond); color: var(--calc-texte); font: 16px/1.5 var(--calc-police); }
.express { max-width: 640px; margin: 0 auto; padding: 24px 16px; }
h1 { margin: 0 0 8px; font-size: 1.5rem; line-height: 1.25; color: var(--calc-marine); }
.intro { margin: 0 0 20px; color: var(--calc-gris); }
form, .resultat { background: var(--calc-carte); border: 1px solid var(--calc-bordure); border-radius: var(--calc-rayon); padding: 20px 16px; }
.resultat { margin-top: 16px; }
.champ { margin-bottom: 16px; }
label { display: block; margin-bottom: 4px; font-weight: 600; }
.facultatif { font-weight: 400; color: var(--calc-gris); }
input, select { width: 100%; min-height: 44px; padding: 8px 12px; font: inherit; color: inherit; background: #fff; border: 1px solid #8a96a3; border-radius: 8px; }
input:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid var(--calc-sarcelle); outline-offset: 2px; }
.aide { margin: 4px 0 0; font-size: .9rem; color: var(--calc-gris); }
.erreur { min-height: 1.5em; margin: 0 0 8px; color: var(--calc-alerte); font-weight: 600; }
.principal, .continuer { display: inline-block; min-height: 48px; padding: 12px 24px; font: inherit; font-weight: 600; text-decoration: none; text-align: center;
  color: var(--calc-bouton-texte); background: var(--calc-bouton); border: 0; border-radius: 8px; cursor: pointer; }
.principal:disabled { opacity: .6; cursor: wait; }
.resultat h2 { margin: 0 0 12px; font-size: 1.15rem; color: var(--calc-marine); }
.resultat dl { margin: 0 0 12px; }
.resultat dt { margin-top: 12px; color: var(--calc-gris); font-size: .95rem; }
.resultat dd { margin: 0; font-size: 1.25rem; font-weight: 700; color: var(--calc-marine); }
.resultat dd small { display: block; font-size: .95rem; font-weight: 400; color: var(--calc-texte); }
.note { padding: 10px 12px; margin: 12px 0; font-size: .95rem; background: var(--calc-ok-fond); border-radius: 8px; }
.invite { margin: 12px 0; color: var(--calc-attention); }
.suite { margin-top: 16px; }
@media (max-width: 480px) { .principal, .continuer { display: block; width: 100%; } h1 { font-size: 1.3rem; } }