/* Site public de vente d'USDT contre mobile money — design orienté conversion, mobile-first,
   inspiré des produits fintech grand public (dégradé de marque, cartes, calculateur en avant). */

:root {
  --bg: #f5f7fb;
  --carte: #ffffff;
  --bordure: #e4e9f2;
  --texte: #131a29;
  --discret: #6b7688;
  --accent: #5b5bf6;
  --accent-fonce: #4444d1;
  --accent-clair: #eeeeff;
  --degrade-debut: #5b5bf6;
  --degrade-fin: #8f5bf6;
  --erreur: #d64545;
  --erreur-fond: #fdeeee;
  --ok: #1f9d55;
  --ok-fond: #eafbf1;
  --ombre: 0 8px 30px rgba(24, 24, 60, 0.08);
  --rayon: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f18;
    --carte: #161a26;
    --bordure: #262c3d;
    --texte: #eef1f8;
    --discret: #93a0b8;
    --accent: #7c7cff;
    --accent-fonce: #9a9aff;
    --accent-clair: #1e1e3a;
    --erreur-fond: #2a1618;
    --ok-fond: #122a1c;
    --ombre: 0 8px 30px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: "Inter", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--texte);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.fond-degrade {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 15% -10%, color-mix(in srgb, var(--degrade-debut) 22%, transparent), transparent 55%),
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--degrade-fin) 18%, transparent), transparent 50%);
}

/* En-tête */
.entete { padding: 18px 20px; }
.entete-contenu {
  max-width: 560px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.marque {
  display: flex; align-items: center; gap: 8px;
  font-weight: 800; font-size: 1.15em; letter-spacing: -0.01em;
  color: var(--texte); text-decoration: none;
}
.marque-icone {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--degrade-debut), var(--degrade-fin));
  color: #fff; font-size: 1em;
}
.accent-texte { color: var(--accent); }
.entete-info {
  font-size: 0.82em; color: var(--discret); font-weight: 500;
  white-space: nowrap;
}

main { max-width: 560px; margin: 0 auto; padding: 8px 20px 48px; }

/* Bandeaux flash */
.messages { margin-bottom: 16px; }
.bandeau {
  margin: 0 0 10px; padding: 12px 14px; border-radius: 10px; font-size: 0.92em; font-weight: 500;
}
.bandeau-erreur { background: var(--erreur-fond); color: var(--erreur); }
.bandeau-ok { background: var(--ok-fond); color: var(--ok); }

/* Titres */
.conteneur-etroit { padding-top: 8px; }
.titre-page {
  font-size: 1.9em; font-weight: 800; letter-spacing: -0.02em; line-height: 1.15;
  margin: 6px 0 10px;
}
.titre-page-petit { font-size: 1.4em; text-align: center; }
.sous-titre { color: var(--discret); font-size: 1.02em; margin: 0 0 26px; }

.fil-ariane { color: var(--discret); font-size: 0.88em; margin: 4px 0 16px; }
.fil-ariane strong { color: var(--texte); font-family: ui-monospace, monospace; }

/* Cartes */
.carte {
  background: var(--carte);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  box-shadow: var(--ombre);
  padding: 24px;
  margin-bottom: 18px;
}
.carte-indisponible { text-align: center; }

/* Calculateur bidirectionnel */
.carte-calculateur { padding: 22px; }
.champ-honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.bloc-montant {
  background: var(--bg);
  border: 1px solid var(--bordure);
  border-radius: 12px;
  padding: 14px 16px;
}
.bloc-montant label {
  display: block; font-size: 0.8em; color: var(--discret); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.03em; margin-bottom: 6px;
}
.ligne-montant { display: flex; align-items: center; gap: 10px; }
.ligne-montant input {
  flex: 1; min-width: 0; border: none; background: transparent; color: var(--texte);
  font-size: 1.6em; font-weight: 700; font-family: inherit; padding: 0;
}
.ligne-montant input:focus { outline: none; }
.ligne-montant input::placeholder { color: var(--discret); opacity: 0.5; }

.devise {
  flex-shrink: 0; padding: 5px 11px; border-radius: 20px; font-size: 0.82em; font-weight: 700;
}
.devise-crypto { background: var(--accent-clair); color: var(--accent-fonce); }
.devise-fiat { background: var(--ok-fond); color: var(--ok); }

.separateur-echange { display: flex; justify-content: center; margin: -6px 0; position: relative; z-index: 1; }
.separateur-icone {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--carte); border: 1px solid var(--bordure);
  color: var(--accent); font-weight: 700;
}

.ligne-taux {
  text-align: center; font-size: 0.85em; color: var(--discret);
  margin: 16px 0 4px;
}
.ligne-taux strong { color: var(--texte); }

.champ { margin: 16px 0 0; }
.champ label { display: block; margin-bottom: 6px; color: var(--discret); font-size: 0.85em; font-weight: 600; }
.champ input {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--bordure);
  background: var(--bg); color: var(--texte); font-size: 1em; font-family: inherit;
}
.champ input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

button, .bouton-principal {
  display: block; width: 100%; padding: 15px; border: none; border-radius: 12px;
  background: linear-gradient(135deg, var(--degrade-debut), var(--degrade-fin));
  color: #fff; font-weight: 700; font-size: 1.02em; font-family: inherit; cursor: pointer;
  margin-top: 20px; text-align: center; text-decoration: none;
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
button:hover, .bouton-principal:hover { transform: translateY(-1px); }
button:active, .bouton-principal:active { transform: translateY(0); }

.note-discrete { color: var(--discret); font-size: 0.8em; text-align: center; margin: 12px 0 0; }

/* Badges de confiance */
.grille-confiance {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 20px;
}
.badge-confiance {
  background: var(--carte); border: 1px solid var(--bordure); border-radius: 12px;
  padding: 12px 8px; text-align: center; font-size: 0.76em; font-weight: 600; color: var(--discret);
}
.badge-confiance span { display: block; font-size: 1.5em; margin-bottom: 4px; }

/* Page de commande */
.carte-depot { padding: 22px; }
.etape-numero {
  font-size: 0.8em; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em;
  color: var(--accent); margin: 22px 0 8px;
}
.etape-numero:first-child { margin-top: 0; }

.montant-a-copier {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--accent-clair); border-radius: 12px; padding: 14px 16px;
}
.montant-valeur { font-size: 1.5em; font-weight: 800; font-family: ui-monospace, "SF Mono", monospace; }

.adresse-a-copier {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg); border: 1px solid var(--bordure); border-radius: 12px; padding: 12px 14px;
}
.adresse-a-copier code {
  flex: 1; min-width: 0; background: none; padding: 0; font-size: 0.82em; word-break: break-all;
}

.bouton-copier {
  flex-shrink: 0; width: auto; margin: 0; padding: 8px 14px; font-size: 0.82em;
  background: var(--carte); color: var(--accent); border: 1px solid var(--bordure);
  box-shadow: none;
}
.bouton-copier:hover { transform: none; background: var(--accent-clair); }
.bouton-copier.copie { color: var(--ok); border-color: var(--ok); }

.avertissement {
  font-size: 0.82em; color: var(--erreur); background: var(--erreur-fond);
  border-radius: 10px; padding: 10px 12px; margin: 10px 0 0;
}

.bloc-qr {
  display: flex; justify-content: center; padding: 18px 0 4px;
}
.bloc-qr img, .bloc-qr canvas { border-radius: 10px; background: #fff; padding: 8px; }

.montant-a-recevoir { font-size: 1.7em; font-weight: 800; margin: 4px 0 2px; }

/* Statut */
.carte-statut { text-align: center; }
.statut-ligne {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  font-size: 1.05em; font-weight: 700; padding: 6px 0;
}
.statut-pictogramme { font-size: 1.4em; }
.statut-pictogramme-grand { font-size: 2.6em; margin: 0 0 6px; }
.statut-attente { color: var(--discret); }
.statut-progression { color: var(--accent); }
.statut-succes { color: var(--ok); }
.statut-expire { color: var(--discret); }
.statut-echec { color: var(--erreur); }

/* Pied de page */
.pied { text-align: center; padding: 24px 20px 40px; color: var(--discret); font-size: 0.78em; }

@media (max-width: 420px) {
  .titre-page { font-size: 1.6em; }
  .ligne-montant input { font-size: 1.35em; }
  .grille-confiance { gap: 8px; }
}