:root {
  --fond: #f4f5f7;
  --surface: #ffffff;
  --texte: #1b1f24;
  --doux: #5b6470;
  --ligne: #d9dde3;
  --accent: #1f5fbf;
  --accent-doux: #e7eefb;
  --bon: #2e7d4f;
  --attention: #a86400;
  --attention-fond: #fff4e0;
  --danger: #b3261e;
  --danger-fond: #fdecea;
  --info-fond: #eef3fb;
  --rayon: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fond: #14171b;
    --surface: #1d2126;
    --texte: #e8eaed;
    --doux: #9aa3ad;
    --ligne: #333a42;
    --accent: #7aa7f0;
    --accent-doux: #22314a;
    --bon: #5cc189;
    --attention: #f0b14a;
    --attention-fond: #3a2c14;
    --danger: #f28b82;
    --danger-fond: #3d1f1d;
    --info-fond: #1f2a3a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--fond); color: var(--texte); line-height: 1.45; }

.bandeau {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .25rem 1rem;
  padding: .9rem 1rem; background: var(--surface); border-bottom: 1px solid var(--ligne);
}
.bandeau h1 { margin: 0; font-size: 1.35rem; letter-spacing: -.01em; }
.machine { margin: .15rem 0 0; color: var(--doux); font-size: .85rem; }
.rappel { margin: 0; font-size: .85rem; color: var(--attention); font-weight: 600; }

.page {
  display: grid; gap: 1rem; padding: 1rem; max-width: 1280px; margin: 0 auto;
  grid-template-columns: minmax(300px, 420px) 1fr; align-items: start;
}
@media (max-width: 820px) { .page { grid-template-columns: 1fr; } }

.saisie, .resultat {
  background: var(--surface); border: 1px solid var(--ligne); border-radius: var(--rayon); padding: .5rem 1rem 1rem;
}
.resultat { position: sticky; top: 1rem; min-height: 12rem; padding-top: 1rem; }
@media (max-width: 820px) { .resultat { position: static; } }

fieldset { border: 0; border-top: 1px solid var(--ligne); margin: .5rem 0 0; padding: .6rem 0 .2rem; }
fieldset:first-child { border-top: 0; }
fieldset[hidden], [hidden] { display: none !important; }
legend { font-weight: 700; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--doux); padding: 0; }

.champ { display: grid; gap: .25rem; margin: .5rem 0; font-size: .85rem; color: var(--doux); }
.champ > span { font-weight: 600; }
input[type=number], input[type=search], select {
  width: 100%; font: inherit; font-size: 1rem; color: var(--texte); background: var(--surface);
  border: 1px solid var(--ligne); border-radius: 8px; padding: .55rem .6rem; min-height: 2.6rem;
}
input:focus-visible, select:focus-visible, button:focus-visible, .choix input:focus-visible + span {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.grille { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 0 .75rem; }
.info-matiere, .aide { margin: .2rem 0 .4rem; font-size: .8rem; color: var(--doux); }

.choix { display: flex; flex-wrap: wrap; gap: .4rem; margin: .6rem 0; }
.choix label { flex: 1 1 auto; position: relative; }
.choix input { position: absolute; opacity: 0; pointer-events: none; }
.choix span {
  display: block; text-align: center; padding: .55rem .7rem; border: 1px solid var(--ligne); border-radius: 8px;
  cursor: pointer; font-size: .9rem; font-weight: 600; user-select: none; min-height: 2.6rem;
}
.choix input:checked + span { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .choix input:checked + span { color: #0d1420; } }

.lien { background: none; border: 0; padding: 0; color: var(--accent); font: inherit; font-size: .85rem; cursor: pointer; text-decoration: underline; }

.statut { border-radius: 8px; padding: .9rem 1rem; font-weight: 600; margin-bottom: 1rem; }
.statut.vide { background: var(--info-fond); }
.statut.info { background: var(--info-fond); }
.statut.danger { background: var(--danger-fond); color: var(--danger); }
.statut.erreur { background: var(--danger-fond); color: var(--danger); }

.chiffres { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: .75rem; }
.carte {
  display: grid; grid-template-columns: auto 1fr; grid-template-areas: "sym sym" "val unit" "lab lab";
  align-items: baseline; gap: 0 .4rem; padding: .75rem .9rem; border-radius: var(--rayon);
  background: var(--accent-doux);
}
.carte .sym { grid-area: sym; font-weight: 700; color: var(--accent); font-size: .9rem; }
.carte .val { grid-area: val; font-size: 2.1rem; font-weight: 750; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.carte .unit { grid-area: unit; color: var(--doux); font-size: .9rem; }
.carte .lab { grid-area: lab; color: var(--doux); font-size: .78rem; }
@media (max-width: 520px) {
  .chiffres { grid-template-columns: 1fr 1fr; gap: .5rem; }
  .carte { padding: .6rem .7rem; }
  .carte .val { font-size: 1.6rem; }
  .carte .unit { grid-column: 1 / -1; grid-row: 3; }
  .carte .lab { display: none; }
}

.alertes { display: grid; gap: .5rem; margin-top: 1rem; }
.alerte { border-left: 4px solid; border-radius: 6px; padding: .55rem .75rem; font-size: .9rem; }
.alerte.info { border-color: var(--accent); background: var(--info-fond); }
.alerte.attention { border-color: var(--attention); background: var(--attention-fond); }
.alerte.danger { border-color: var(--danger); background: var(--danger-fond); }

.secondaires { display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1rem; margin: 1rem 0 0; font-size: .92rem; }
.secondaires dt { color: var(--doux); }
.secondaires dd { margin: 0; font-variant-numeric: tabular-nums; }
.jauge { display: block; height: .45rem; margin-top: .3rem; background: var(--ligne); border-radius: 99px; overflow: hidden; max-width: 260px; }
.jauge > span { display: block; height: 100%; border-radius: 99px; }
.jauge .bon { background: var(--bon); }
.jauge .limite { background: var(--attention); }
.jauge .trop { background: var(--danger); }

.source { margin-top: 1rem; font-size: .82rem; color: var(--doux); }
.calcul { margin-top: .75rem; font-size: .85rem; }
.calcul summary { cursor: pointer; color: var(--accent); font-weight: 600; }
.calcul ul { margin: .5rem 0 0; padding-left: 1.1rem; color: var(--doux); }
.calcul li { margin: .25rem 0; }

.pied { max-width: 1280px; margin: 0 auto; padding: 0 1rem 1.5rem; font-size: .78rem; color: var(--doux); }
.pied p { margin: .3rem 0; }

/* --- Connexion ------------------------------------------------------------ */
input[type=text], input[type=password] {
  width: 100%; font: inherit; font-size: 1rem; color: var(--texte); background: var(--surface);
  border: 1px solid var(--ligne); border-radius: 8px; padding: .55rem .6rem; min-height: 2.6rem;
}
input[type=text]:focus-visible, input[type=password]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.page-connexion { min-height: 100vh; }
.connexion { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.connexion-carte {
  width: min(380px, 100%); background: var(--surface); border: 1px solid var(--ligne);
  border-radius: var(--rayon); padding: 1.5rem 1.25rem 1.25rem;
}
.connexion-titre { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; }
.connexion-titre img { border-radius: 9px; }
.connexion-titre h1 { margin: 0; font-size: 1.2rem; letter-spacing: -.01em; }
.connexion-titre p { margin: .1rem 0 0; color: var(--doux); font-size: .85rem; }
.connexion-erreur {
  margin: 0 0 .5rem; padding: .55rem .75rem; border-radius: 6px; border-left: 4px solid var(--danger);
  background: var(--danger-fond); color: var(--danger); font-size: .9rem; font-weight: 600;
}
.bouton {
  width: 100%; margin-top: .75rem; min-height: 2.8rem; border: 0; border-radius: 8px; cursor: pointer;
  background: var(--accent); color: #fff; font: inherit; font-weight: 700; font-size: 1rem;
}
.bouton:hover { filter: brightness(1.08); }
.bouton:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (prefers-color-scheme: dark) { .bouton { color: #0d1420; } }

.bandeau-droite { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; }
.deconnexion { font-size: .85rem; color: var(--doux); }
.deconnexion:hover { color: var(--accent); }