:root {
  --fond: #f6f5f1;
  --carte: #ffffff;
  --texte: #1f2328;
  --discret: #5f6670;
  --bord: #dcd9d0;
  --accent: #1d5fa8;
  --erreur: #a8321d;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  padding: 0 16px 32px;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--fond);
  color: var(--texte);
  line-height: 1.5;
}

header, form, #etat, #historique, main, footer { max-width: 1200px; margin-left: auto; margin-right: auto; }
header h1 { margin: 24px 0 4px; font-size: 1.6rem; }
header p { margin: 0 0 20px; color: var(--discret); }

form {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end;
  background: var(--carte); border: 1px solid var(--bord); border-radius: 8px; padding: 16px;
}
label { display: flex; flex-direction: column; gap: 4px; font-size: .9rem; color: var(--discret); flex: 1 1 180px; }
input { font: inherit; padding: 8px 10px; border: 1px solid var(--bord); border-radius: 6px; color: var(--texte); }
label:nth-child(3) { flex: 0 1 110px; }
button {
  font: inherit; font-weight: 600; padding: 9px 18px; border: 0; border-radius: 6px;
  background: var(--accent); color: #fff; cursor: pointer;
}
button:disabled { opacity: .6; cursor: wait; }

#etat { min-height: 1.5em; margin-top: 12px; color: var(--discret); }
#etat.erreur { color: var(--erreur); font-weight: 600; }

section, #carte { background: var(--carte); border: 1px solid var(--bord); border-radius: 8px; }
section { padding: 16px; margin-top: 16px; }
#resume p { margin: 4px 0; }

.grille { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; margin-top: 16px; }
.grille section { margin-top: 0; }
#carte { height: 520px; }

#chiffres h3 { margin: 12px 0 6px; font-size: 1rem; }
#chiffres h3:first-child { margin-top: 0; }
.ligne { display: grid; grid-template-columns: 1fr auto; gap: 8px; font-size: .92rem; }
.barre { height: 6px; background: #e8e5dc; border-radius: 3px; margin: 2px 0 6px; }
.barre span { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
.gros { font-size: 1.8rem; font-weight: 700; }

.legende { display: flex; flex-wrap: wrap; gap: 10px; font-size: .85rem; color: var(--discret); margin-top: 8px; }
.pastille { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 4px; }

#rapport h3 { margin: 18px 0 6px; }
#rapport h3:first-child { margin-top: 0; }
.avertissement { color: var(--erreur); }

#historique h2 { margin: 0 0 10px; font-size: 1.15rem; }
#historique form { border: 0; padding: 0; background: none; max-width: 420px; margin: 0; }
#historique-etat { margin: 8px 0 0; color: var(--discret); }
#historique-etat:empty { display: none; }
#historique-etat.erreur { color: var(--erreur); font-weight: 600; }
#historique-liste { list-style: none; margin: 0; padding: 0; }
#historique-liste li { border-top: 1px solid var(--bord); padding: 8px 0; }
#historique-liste li:first-child { border-top: 0; }
.etude-ligne { display: flex; flex-wrap: wrap; gap: 4px 12px; align-items: baseline; }
.etude-date { color: var(--discret); font-size: .85rem; }
.etude-nb { margin-left: auto; font-weight: 600; }
#historique-liste summary { cursor: pointer; color: var(--accent); font-size: .9rem; margin-top: 2px; }
.etude-rapport { padding: 8px 12px; margin-top: 6px; background: var(--fond); border-radius: 6px; }

footer { margin-top: 24px; font-size: .8rem; color: var(--discret); }

@media (max-width: 800px) {
  .grille { grid-template-columns: 1fr; }
  #carte { height: 380px; }
}