:root {
  --ink: #14171c;
  --paper: #ffffff;
  --muted: #667085;
  --line: #e4e7ec;
  --brick: #2f8fe0;
  --brick-dark: #1c5f9e;
  --bg: #f7f9fc;
  --gain: #2f8f4e;
  --loss: #c0392b;
  --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

a { color: var(--brick-dark); }

.conteneur {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

/* --- Page d'accueil --- */

.accueil-hero {
  text-align: center;
  padding: 64px 20px 40px;
}

.accueil-hero h1 {
  font-size: 2.1rem;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--ink);
}

.accueil-hero p.sous-titre {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto 32px;
}

.bouton {
  display: inline-block;
  background: var(--brick);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 16px 32px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease;
}
.bouton:hover { background: var(--brick-dark); }
.bouton:active { transform: translateY(1px); }
.bouton.secondaire {
  background: transparent;
  color: var(--brick-dark);
  border: 2px solid var(--brick);
}
.bouton.secondaire:hover { background: #eaf3fc; }
.bouton:disabled { background: #b9c2cd; cursor: not-allowed; }

.accueil-explication {
  max-width: 560px;
  margin: 40px auto 0;
  color: var(--muted);
  font-size: 0.98rem;
}
.accueil-explication ul { padding-left: 20px; margin-top: 8px; }
.accueil-explication li { margin-bottom: 6px; }

/* --- Barre de progression --- */

.progression {
  display: flex;
  gap: 6px;
  margin: 8px 0 32px;
}
.progression .etape-puce {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--line);
  transition: background 0.2s ease;
}
.progression .etape-puce.faite,
.progression .etape-puce.active { background: var(--brick); }

.etape-titre {
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.etape-titre .num { color: var(--brick-dark); font-weight: 700; }

/* --- Formulaire --- */

.carte {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-bottom: 20px;
}

.champ { margin-bottom: 20px; }
.champ:last-child { margin-bottom: 0; }

.champ label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 6px;
}
.champ .unite {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.85rem;
}
.champ .aide {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 4px;
}

.champ input[type="number"],
.champ input[type="text"],
.champ select {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
}
.champ input:focus, .champ select:focus {
  outline: none;
  border-color: var(--brick);
}

.champ .avertissement {
  color: #a86400;
  background: #fff6e6;
  border: 1px solid #ffe0a3;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.85rem;
  margin-top: 6px;
  display: none;
}
.champ .avertissement.visible { display: block; }

.choix-groupe {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.choix-btn {
  flex: 1;
  min-width: 120px;
  padding: 12px 14px;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  cursor: pointer;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 500;
}
.choix-btn.selectionne {
  border-color: var(--brick);
  background: #eaf3fc;
  color: var(--brick-dark);
  font-weight: 700;
}

.nav-etapes {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 24px;
}
.nav-etapes .bouton { flex: 1; text-align: center; }

.masque { display: none !important; }

/* --- Resultat --- */

.resultat-principal {
  text-align: center;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  padding: 36px 24px;
  margin-bottom: 20px;
}
.resultat-principal .accroche {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9db3cc;
  margin-bottom: 10px;
}
.resultat-principal .gros-chiffre {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.2;
}
.resultat-principal .gros-chiffre small {
  font-size: 1.1rem;
  font-weight: 400;
  color: #c7d5e6;
}
.resultat-principal .ligne-secondaire {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-top: 18px;
  font-size: 1.05rem;
  color: #e7edf5;
}
.resultat-principal .ligne-secondaire b { color: #fff; }

.tableau-detail { width: 100%; border-collapse: collapse; }
.tableau-detail th, .tableau-detail td {
  text-align: left;
  padding: 10px 4px;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}
.tableau-detail th:last-child, .tableau-detail td:last-child { text-align: right; }
.tableau-detail tr.total-ligne td { font-weight: 700; border-top: 2px solid var(--ink); border-bottom: none; }
.valeur-negative { color: var(--gain); }

.note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 10px;
  padding: 10px 12px;
  background: #f3f5f8;
  border-radius: 8px;
}

.graphique-conteneur { margin: 16px 0; }

.projection-grille {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 12px;
}
.projection-case {
  background: #f3f5f8;
  border-radius: 8px;
  padding: 14px;
  text-align: center;
}
.projection-case .label { font-size: 0.8rem; color: var(--muted); text-transform: uppercase; }
.projection-case .valeur { font-size: 1.3rem; font-weight: 700; margin-top: 4px; }

.pied-page {
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 40px;
}

@media (max-width: 480px) {
  .accueil-hero h1 { font-size: 1.6rem; }
  .resultat-principal .gros-chiffre { font-size: 2.1rem; }
  .resultat-principal .ligne-secondaire { flex-direction: column; gap: 8px; }
  .choix-btn { min-width: 100%; }
}