:root {
  --km-bleu: #1a56db;
  --km-bleu-fonce: #1544ac;
  --km-blanc: #ffffff;
  --km-gris-clair: #f3f5f9;
  --km-gris-bordure: #e2e6ee;
  --km-texte: #1f2430;
  --km-texte-clair: #6b7280;
  --km-rouge: #e53e3e;
  --km-ombre: 0 2px 10px rgba(20, 30, 60, 0.08);
  --km-radius: 14px;
}

* { box-sizing: border-box; }

/* Garantit que l'attribut hidden l'emporte toujours, même sur des
   éléments dont une classe définit son propre "display" (flex,
   inline-block, etc.) — plusieurs classes du fichier (.sc-vue-admin,
   .sc-conversation-admin, .sc-etat-vide, .sc-btn...) font ça, et sans
   cette règle le contenu resterait visible malgré JS qui met
   hidden = true. */
[hidden] {
  display: none !important;
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, -apple-system, sans-serif;
  background: var(--km-gris-clair);
  color: var(--km-texte);
}

.sc-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  background: var(--km-blanc);
  border-bottom: 1px solid var(--km-gris-bordure);
  position: sticky;
  top: 0;
  z-index: 10;
}

.sc-retour {
  color: var(--km-bleu);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}
.sc-retour:hover { text-decoration: underline; }

.sc-titre-principal {
  font-size: 18px;
  margin: 0;
  color: var(--km-texte);
}

.sc-btn-espace-admin {
  margin-left: auto;
  flex-shrink: 0;
}

/* ---------- États vides / chargement ---------- */
.sc-etat-vide {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 20px;
}
.sc-etat-vide-interne { min-height: 300px; }

.sc-carte-message {
  background: var(--km-blanc);
  border-radius: var(--km-radius);
  box-shadow: var(--km-ombre);
  padding: 30px 24px;
  text-align: center;
  max-width: 360px;
}
.sc-carte-message p { color: var(--km-texte-clair); margin-bottom: 16px; }

.sc-spinner {
  width: 28px;
  height: 28px;
  margin: 0 auto 12px;
  border: 3px solid var(--km-gris-bordure);
  border-top-color: var(--km-bleu);
  border-radius: 50%;
  animation: sc-spin 0.8s linear infinite;
}
@keyframes sc-spin { to { transform: rotate(360deg); } }

/* ---------- Boutons ---------- */
.sc-btn {
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
.sc-btn-primaire {
  background: var(--km-bleu);
  color: var(--km-blanc);
}
.sc-btn-primaire:hover { background: var(--km-bleu-fonce); }
.sc-btn-primaire:disabled { opacity: 0.6; cursor: not-allowed; }

/* ---------- Carte générique ---------- */
.sc-carte {
  background: var(--km-blanc);
  border-radius: var(--km-radius);
  box-shadow: var(--km-ombre);
  overflow: hidden;
}

/* ---------- Vue client ---------- */
.sc-vue-client {
  max-width: 720px;
  margin: 20px auto;
  padding: 0 14px;
}

.sc-conversation-unique {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 120px);
  min-height: 420px;
}

.sc-intro {
  padding: 16px 18px;
  border-bottom: 1px solid var(--km-gris-bordure);
}
.sc-intro h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--km-texte);
}

.sc-banniere-invite {
  margin-top: 10px;
  padding: 10px 12px;
  background: #fff7e6;
  border: 1px solid #ffe1a8;
  border-radius: 10px;
  font-size: 13px;
  color: #7a5b12;
  line-height: 1.4;
}
.sc-banniere-invite a {
  color: var(--km-bleu);
  font-weight: 600;
}

/* ---------- Zone messages (commune client / admin) ---------- */
.sc-zone-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--km-gris-clair);
}

.sc-bulle {
  max-width: 78%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.4;
  word-wrap: break-word;
  position: relative;
}
.sc-bulle-heure {
  display: block;
  font-size: 11px;
  margin-top: 4px;
  opacity: 0.7;
}

.sc-bulle-client {
  align-self: flex-end;
  background: var(--km-bleu);
  color: var(--km-blanc);
  border-bottom-right-radius: 4px;
}
.sc-bulle-service {
  align-self: flex-start;
  background: var(--km-blanc);
  color: var(--km-texte);
  border: 1px solid var(--km-gris-bordure);
  border-bottom-left-radius: 4px;
}
.sc-bulle-label {
  font-size: 11px;
  font-weight: 700;
  opacity: 0.75;
  display: block;
  margin-bottom: 2px;
}

.sc-jour-separateur {
  align-self: center;
  font-size: 11px;
  color: var(--km-texte-clair);
  background: var(--km-gris-bordure);
  padding: 2px 10px;
  border-radius: 8px;
  margin: 6px 0;
}

.sc-vide-conversation {
  align-self: center;
  color: var(--km-texte-clair);
  font-size: 13px;
  margin-top: 20px;
}

/* ---------- Zone de saisie (commune) ---------- */
.sc-zone-saisie {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  padding: 12px 14px;
  border-top: 1px solid var(--km-gris-bordure);
  background: var(--km-blanc);
}
.sc-input {
  flex: 1;
  resize: none;
  border: 1px solid var(--km-gris-bordure);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  max-height: 120px;
  min-height: 42px;
}
.sc-input:focus {
  outline: none;
  border-color: var(--km-bleu);
}
.sc-btn-envoyer { flex-shrink: 0; }

.sc-erreur {
  margin: 0 14px 10px;
  padding: 8px 12px;
  background: #fdecec;
  color: var(--km-rouge);
  border-radius: 8px;
  font-size: 13px;
}

/* ---------- Vue admin ---------- */
.sc-vue-admin {
  display: flex;
  flex-direction: column;
  max-width: 1100px;
  margin: 20px auto;
  padding: 0 14px;
  gap: 14px;
  height: calc(100vh - 110px);
}

.sc-panneau-clients {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.sc-panneau-titre {
  padding: 14px 16px;
  border-bottom: 1px solid var(--km-gris-bordure);
}
.sc-panneau-titre h2 { margin: 0; font-size: 15px; }

.sc-liste-clients {
  overflow-y: auto;
  flex: 1;
}

.sc-item-client {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--km-gris-bordure);
}
.sc-item-client:hover { background: var(--km-gris-clair); }
.sc-item-client.sc-actif { background: #eaf1fd; }

.sc-item-client-infos { min-width: 0; }
.sc-item-client-nom {
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sc-item-client-apercu {
  font-size: 12px;
  color: var(--km-texte-clair);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.sc-badge-non-lu {
  background: var(--km-rouge);
  color: var(--km-blanc);
  font-size: 11px;
  font-weight: 700;
  border-radius: 999px;
  padding: 2px 8px;
  flex-shrink: 0;
  margin-left: 8px;
}

.sc-panneau-conversation {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.sc-btn-retour-liste {
  border: none;
  background: none;
  color: var(--km-bleu);
  font-weight: 600;
  font-size: 14px;
  text-align: left;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--km-gris-bordure);
}

.sc-conversation-admin {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.sc-admin-entete {
  padding: 14px 16px;
  border-bottom: 1px solid var(--km-gris-bordure);
}
.sc-admin-nom-client { font-weight: 700; font-size: 15px; }
.sc-admin-email-client { font-size: 12px; color: var(--km-texte-clair); }

/* ---------- Notifications ---------- */
.sc-toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--km-texte);
  color: var(--km-blanc);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 13px;
  box-shadow: var(--km-ombre);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.sc-toast.sc-toast-visible { opacity: 1; }

/* ---------- Bouton Help flottant (optionnel, voir doc) ---------- */
.km-btn-help {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--km-bleu);
  color: var(--km-blanc);
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  box-shadow: var(--km-ombre);
  z-index: 50;
}
.km-btn-help:hover { background: var(--km-bleu-fonce); }

/* =========================================================
   RESPONSIVE
   ========================================================= */

/* Ordinateur : admin en 2 colonnes côte à côte */
@media (min-width: 900px) {
  .sc-vue-admin {
    flex-direction: row;
  }
  .sc-panneau-clients {
    width: 300px;
    flex-shrink: 0;
  }
  .sc-btn-retour-liste { display: none !important; }
}

/* Téléphone : admin = liste OU conversation, jamais les deux */
@media (max-width: 899px) {
  .sc-vue-admin {
    height: calc(100vh - 100px);
  }
  .sc-panneau-clients.sc-cache-mobile,
  .sc-panneau-conversation.sc-cache-mobile {
    display: none;
  }
  .sc-item-client-apercu { max-width: 140px; }
}

@media (max-width: 480px) {
  .sc-header { padding: 12px 14px; flex-wrap: wrap; row-gap: 8px; }
  .sc-titre-principal { font-size: 16px; }
  .sc-btn-espace-admin { margin-left: 0; width: 100%; text-align: center; }
  .sc-bulle { max-width: 88%; }
  .sc-vue-client { padding: 0; margin: 0; }
  .sc-conversation-unique { height: calc(100vh - 100px); border-radius: 0; }
}