* { box-sizing: border-box; }
body {
  font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  margin: 0;
  color: #1a1a1a;
  background: #f4f4f4;
}

/* Login */
.tela-login { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.caixa-login {
  background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 1px 6px rgba(0,0,0,.12);
  width: 100%; max-width: 320px; display: flex; flex-direction: column; gap: .5rem;
}
.caixa-login h1 { font-size: 1.1rem; margin: 0 0 .5rem; }
.caixa-login input { padding: .5rem; border: 1px solid #ccc; border-radius: 4px; font-size: 1rem; }
.caixa-login button { margin-top: .5rem; padding: .6rem; border: 0; border-radius: 4px; background: #2b6cb0; color: #fff; font-size: 1rem; cursor: pointer; }
.erro { color: #c53030; font-size: .85rem; margin: 0; }

/* App principal */
.topo {
  display: flex; align-items: center; justify-content: space-between;
  background: #2b6cb0; color: #fff; padding: .75rem 1rem;
}
.topo h1 { font-size: 1.1rem; margin: 0; }
.topo button { background: transparent; border: 1px solid #fff; color: #fff; padding: .35rem .75rem; border-radius: 4px; cursor: pointer; }

.layout { display: flex; height: calc(100vh - 52px); }
.coluna-conversas { width: 320px; background: #fff; border-right: 1px solid #ddd; overflow-y: auto; }
#lista-conversas { list-style: none; margin: 0; padding: 0; }
#lista-conversas li { padding: .75rem 1rem; border-bottom: 1px solid #eee; cursor: pointer; }
#lista-conversas li:hover { background: #f0f6fc; }
#lista-conversas li.selecionada { background: #dbeafe; }
.item-nome { font-weight: 600; display: block; }
.item-meta { font-size: .78rem; color: #666; display: flex; justify-content: space-between; margin-top: .2rem; }

.coluna-mensagens { flex: 1; display: flex; flex-direction: column; }
.vazio { margin: auto; color: #888; }
#painel-conversa { display: flex; flex-direction: column; height: 100%; }
.cabecalho-conversa { display: flex; justify-content: space-between; align-items: center; padding: .75rem 1rem; background: #fff; border-bottom: 1px solid #ddd; }
.secundario { color: #666; font-size: .85rem; margin-left: .5rem; }
.acoes { display: flex; gap: .5rem; align-items: center; }
.acoes button { padding: .35rem .6rem; border-radius: 4px; border: 1px solid #bbb; background: #fff; cursor: pointer; }
.badge { padding: .2rem .5rem; border-radius: 10px; font-size: .75rem; font-weight: 600; }
.badge.iara { background: #e6fffa; color: #234e52; }
.badge.humano { background: #fff5f5; color: #822727; }

.aviso { background: #fff5cc; color: #665200; padding: .5rem 1rem; font-size: .85rem; }

.historico { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: .5rem; }
.msg { max-width: 65%; padding: .5rem .75rem; border-radius: 8px; font-size: .92rem; white-space: pre-wrap; }
.msg.entrada { align-self: flex-start; background: #fff; border: 1px solid #ddd; }
.msg.saida { align-self: flex-end; background: #dbeafe; }
.msg .meta { display: block; font-size: .7rem; color: #888; margin-top: .25rem; }
.msg.status-erro { border: 1px solid #f00; }
.msg.status-pendente { opacity: .6; border: 1px dashed #999; }
.msg.status-enviada { border: 1px solid transparent; }

.form-enviar { display: flex; gap: .5rem; padding: .75rem; background: #fff; border-top: 1px solid #ddd; }
.form-enviar textarea { flex: 1; resize: none; padding: .5rem; border: 1px solid #ccc; border-radius: 4px; font-family: inherit; font-size: .95rem; }
.form-enviar button { padding: 0 1rem; border: 0; border-radius: 4px; background: #2b6cb0; color: #fff; cursor: pointer; }