/* Reset de base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: #ffffff;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Titre LÉO centré */
header {
  text-align: center;
  padding: 15px;
  font-size: 24px;
  font-weight: bold;
  background-color: #ffffff;
  border-bottom: 1px solid #ddd;
  position: sticky;
  top: 0;
  z-index: 999;
}

/* Zone messages */
#chat-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px 10px 90px 10px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Bulle utilisateur (à droite) */
.user-message {
  align-self: flex-end;
  background-color: #000000;
  color: #ffffff;
  padding: 12px 16px;
  border-radius: 18px;
  max-width: 75%;
  word-wrap: break-word;
}

/* Bulle LÉO (à gauche) */
.bot-message {
  align-self: flex-start;
  background-color: #f0f0f0;
  color: #000000;
  padding: 12px 16px;
  border-radius: 18px;
  max-width: 75%;
  word-wrap: break-word;
}

/* Barre de saisie fixée en bas */
footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: #ffffff;
  padding: 10px;
  display: flex;
  gap: 10px;
  border-top: 1px solid #ccc;
}

/* Champ de saisie */
#user-input {
  flex: 1;
  padding: 14px 16px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 999px;
  outline: none;
}

/* Bouton envoyer */
#send-button {
  background-color: #000000;
  color: #ffffff;
  border: none;
  border-radius: 999px;
  padding: 0 20px;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Désactive zoom automatique sur mobile */
input,
button,
textarea {
  font-size: 16px;
}