:root {
  --verde: #008069; --verde-osc: #005c4b; --fondo-chat: #efeae2; --burbuja-yo: #d9fdd3; --burbuja-otro: #ffffff;
  --texto: #111b21; --suave: #667781; --borde: #d1d7db; --panel: #f0f2f5; --alerta: #fff3c4;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; color: var(--texto); background: #d1d7db; }
.contacto { margin-left: 8px; font-weight: 600; color: inherit; white-space: nowrap; }
.aviso-demo { position: sticky; top: 0; z-index: 10; background: var(--alerta); text-align: center; font-size: 13px; padding: 6px 16px; }
.disposicion { display: grid; grid-template-columns: minmax(320px, 440px) minmax(280px, 1fr); gap: 16px; max-width: 1200px; margin: 16px auto; padding: 0 16px; }
.telefono { display: flex; flex-direction: column; height: calc(100vh - 80px); min-height: 520px; background: var(--fondo-chat); border-radius: 12px; overflow: hidden; box-shadow: 0 2px 10px #0002; }
.cabecera { display: flex; align-items: center; gap: 10px; background: var(--verde); color: #fff; padding: 10px 12px; }
.avatar { width: 38px; height: 38px; border-radius: 50%; background: #fff; color: var(--verde); display: grid; place-items: center; font-weight: 700; }
.nombre { font-weight: 600; }
.sub { font-size: 12px; opacity: .85; }
.boton-cabecera { margin-left: auto; background: transparent; color: #fff; border: 1px solid #fff8; border-radius: 16px; padding: 4px 10px; cursor: pointer; }
.mensajes { flex: 1; overflow-y: auto; padding: 12px 10px; display: flex; flex-direction: column; gap: 6px; }
.burbuja { max-width: 82%; padding: 6px 9px 4px; border-radius: 8px; box-shadow: 0 1px 1px #0001; white-space: pre-wrap; word-wrap: break-word; }
.burbuja .hora { display: block; text-align: right; font-size: 11px; color: var(--suave); margin-top: 2px; }
.cliente { align-self: flex-end; background: var(--burbuja-yo); border-top-right-radius: 2px; }
.agente { align-self: flex-start; background: var(--burbuja-otro); border-top-left-radius: 2px; }
.persona { align-self: flex-start; background: #e7f3ff; border-top-left-radius: 2px; }
.persona::before { content: "Persona del equipo"; display: block; font-size: 12px; font-weight: 600; color: #1d4ed8; }
.sistema { align-self: center; background: #ffeecd; color: #54656f; font-size: 12.5px; border-radius: 8px; padding: 4px 10px; text-align: center; max-width: 92%; }
.foto { align-self: flex-start; background: #fff; border-radius: 8px; padding: 4px; width: 220px; }
.foto .marco { height: 120px; border-radius: 6px; background: repeating-linear-gradient(45deg, #e9edef, #e9edef 10px, #dfe5e7 10px, #dfe5e7 20px); display: grid; place-items: center; color: var(--suave); font-size: 12px; text-align: center; padding: 8px; }
.escribiendo { align-self: flex-start; color: var(--suave); font-size: 13px; padding: 4px 8px; }
.barra { display: flex; gap: 8px; padding: 8px; background: var(--panel); }
.barra input { flex: 1; border: 0; border-radius: 20px; padding: 10px 14px; font: inherit; }
.enviar { width: 42px; height: 42px; border-radius: 50%; border: 0; background: var(--verde); color: #fff; font-size: 18px; cursor: pointer; }
.enviar:disabled { opacity: .5; }
.panel { background: var(--panel); border-radius: 12px; padding: 12px; overflow-y: auto; height: calc(100vh - 80px); min-height: 520px; }
.panel h2 { margin: 4px 0 10px; font-size: 17px; }
.panel h3 { margin: 10px 0 6px; font-size: 14px; color: var(--verde-osc); }
.tarjeta { background: #fff; border-radius: 10px; padding: 10px 12px; margin-bottom: 10px; }
.fila { display: flex; justify-content: space-between; gap: 8px; padding: 3px 0; }
.acciones { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
button { font: inherit; }
.acciones button, .responder button, .reloj button { border: 1px solid var(--borde); background: #fff; border-radius: 8px; padding: 5px 10px; cursor: pointer; }
.responder, .reloj { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.responder input, .reloj input { flex: 1; min-width: 140px; border: 1px solid var(--borde); border-radius: 8px; padding: 6px 8px; font: inherit; }
.lista { font-size: 13.5px; }
.lista div { padding: 2px 0; }
.decisiones { margin: 0; padding-left: 20px; font: 12.5px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }
.ayuda { color: var(--suave); font-size: 12.5px; margin: 4px 0; }
@media (max-width: 800px) {
  .disposicion { grid-template-columns: 1fr; }
  .telefono { height: 75vh; }
  .panel { height: auto; }
}