:root {
  --fondo: #f3f4f6;
  --panel: #ffffff;
  --borde: #e5e7eb;
  --texto: #111827;
  --tenue: #6b7280;
  --acento: #128c7e;
  --acento-claro: #dcf8c6;
  --peligro: #dc2626;
  --aviso: #fef3c7;
  --radio: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--fondo);
  color: var(--texto);
  font-size: 14px;
}

button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; }

/* ------------------------------------------------------------------ login */
.login-body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: linear-gradient(160deg, #075e54, #128c7e);
}
.login-card {
  background: var(--panel);
  padding: 32px;
  border-radius: 14px;
  width: 320px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .25);
}
.login-card h1 { margin: 0; font-size: 20px; }
.login-card .sub { margin: 4px 0 20px; color: var(--tenue); }
.login-card label { display: block; margin-bottom: 14px; font-size: 13px; color: var(--tenue); }
.login-card input {
  width: 100%; margin-top: 5px; padding: 10px;
  border: 1px solid var(--borde); border-radius: 8px;
}
.login-card button {
  width: 100%; padding: 11px; border: 0; border-radius: 8px;
  background: var(--acento); color: #fff; font-weight: 600;
}
.error { color: var(--peligro); margin: 0 0 12px; font-size: 13px; }

/* ----------------------------------------------------------------- topbar */
.topbar {
  display: flex; align-items: center; gap: 24px;
  background: #075e54; color: #fff; padding: 0 18px; height: 54px;
}
.marca { display: flex; align-items: center; gap: 9px; }
.punto { width: 9px; height: 9px; border-radius: 50%; background: #25d366; }
.tabs { display: flex; gap: 4px; margin-left: auto; }
.tab {
  background: transparent; border: 0; color: #cfeae6;
  padding: 8px 14px; border-radius: 7px;
}
.tab.activo { background: rgba(255, 255, 255, .16); color: #fff; font-weight: 600; }
.salir { background: transparent; border: 1px solid rgba(255,255,255,.35); color: #fff; padding: 6px 12px; border-radius: 7px; }

/* ------------------------------------------------------------------ vistas */
.vista { display: none; height: calc(100vh - 54px); }
.vista.activa { display: flex; }
#vista-envios.activa, #vista-conocimiento.activa { display: block; overflow-y: auto; }

.oculto { display: none !important; }
.tenue { color: var(--tenue); }
.mini { font-size: 12px; }

/* ----------------------------------------------------------------- bandeja */
.bandeja {
  width: 320px; flex-shrink: 0; background: var(--panel);
  border-right: 1px solid var(--borde); display: flex; flex-direction: column;
}
.bandeja-cabecera { padding: 12px; border-bottom: 1px solid var(--borde); }
.bandeja-cabecera input {
  width: 100%; padding: 8px 10px; border: 1px solid var(--borde); border-radius: 20px;
}
.filtros { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 10px; }
.chip {
  border: 1px solid var(--borde); background: #fff; color: var(--tenue);
  padding: 4px 10px; border-radius: 14px; font-size: 12px;
}
.chip.activo { background: var(--acento); border-color: var(--acento); color: #fff; }

.lista-chats { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
.lista-chats li {
  padding: 11px 13px; border-bottom: 1px solid #f1f2f4; cursor: pointer;
}
.lista-chats li:hover { background: #fafafa; }
.lista-chats li.seleccionado { background: #e8f5f2; }
.chat-linea { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.chat-nombre { font-weight: 600; }
.chat-previo {
  color: var(--tenue); font-size: 12.5px; margin-top: 3px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.badge {
  background: #25d366; color: #fff; border-radius: 10px;
  padding: 1px 7px; font-size: 11px; font-weight: 600;
}
.alerta-humano { color: #b45309; font-size: 11px; font-weight: 600; }
.tags-mini { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 5px; }
.tag-mini {
  background: #eef2ff; color: #3730a3; border-radius: 4px;
  padding: 1px 6px; font-size: 11px;
}

/* -------------------------------------------------------------------- chat */
.chat { flex: 1; display: flex; flex-direction: column; min-width: 0; }
#chat-activo { display: flex; flex-direction: column; height: 100%; }
.vacio { margin: auto; color: var(--tenue); }
.chat-cabecera {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 18px; background: var(--panel); border-bottom: 1px solid var(--borde);
}
.chat-cabecera .tenue { margin-left: 8px; font-size: 12.5px; }

.mensajes {
  flex: 1; overflow-y: auto; padding: 18px;
  background: #efeae2;
  display: flex; flex-direction: column; gap: 7px;
}
.burbuja {
  max-width: 62%; padding: 8px 11px; border-radius: 8px;
  background: #fff; box-shadow: 0 1px 1px rgba(0,0,0,.08);
  white-space: pre-wrap; word-break: break-word;
}
.burbuja.saliente { align-self: flex-end; background: var(--acento-claro); }
.burbuja .meta { display: block; font-size: 10.5px; color: var(--tenue); margin-top: 4px; }
.burbuja.error-envio { background: #fee2e2; }

.redactor { display: flex; gap: 9px; padding: 12px; background: var(--panel); border-top: 1px solid var(--borde); }
.redactor textarea {
  flex: 1; resize: none; padding: 9px 12px;
  border: 1px solid var(--borde); border-radius: 18px;
}
.redactor button {
  background: var(--acento); color: #fff; border: 0;
  padding: 0 22px; border-radius: 18px; font-weight: 600;
}
.aviso { background: var(--aviso); color: #92400e; padding: 9px 18px; font-size: 12.5px; }

/* ----------------------------------------------------------------- lateral */
.lateral {
  width: 270px; flex-shrink: 0; background: var(--panel);
  border-left: 1px solid var(--borde); padding: 16px; overflow-y: auto;
}
.lateral h3 { font-size: 12px; text-transform: uppercase; color: var(--tenue); margin: 18px 0 8px; letter-spacing: .4px; }
.lateral h3:first-child { margin-top: 0; }
.etiquetas { display: flex; flex-wrap: wrap; gap: 6px; }
.etiqueta {
  border: 1px solid var(--borde); border-radius: 13px;
  padding: 3px 10px; font-size: 12px; cursor: pointer; background: #fff;
}
.etiqueta.puesta { color: #fff; border-color: transparent; }
.fila { display: flex; gap: 7px; align-items: center; flex-wrap: wrap; margin-top: 9px; }
.fila input[type=text], .fila input:not([type]), .fila input[type=search] {
  flex: 1; min-width: 90px; padding: 7px 9px; border: 1px solid var(--borde); border-radius: 7px;
}
.fila button { border: 1px solid var(--borde); background: #fff; padding: 7px 12px; border-radius: 7px; }
.fila button.principal { background: var(--acento); border-color: var(--acento); color: #fff; font-weight: 600; }
.notas { list-style: none; margin: 9px 0 0; padding: 0; }
.notas li {
  background: #fffbeb; border: 1px solid #fde68a; border-radius: 7px;
  padding: 8px; margin-bottom: 7px; font-size: 12.5px; position: relative;
}
.notas .borrar {
  position: absolute; top: 5px; right: 6px; border: 0; background: transparent;
  color: var(--tenue); font-size: 14px; line-height: 1;
}
.switch { display: flex; align-items: center; gap: 7px; font-size: 12.5px; cursor: pointer; }

/* --------------------------------------------------------- paginas anchas */
.panel-ancho { max-width: 900px; margin: 0 auto; padding: 26px 20px 60px; }
.panel-ancho h2 { margin-top: 0; }
.tarjeta {
  background: var(--panel); border: 1px solid var(--borde);
  border-radius: var(--radio); padding: 16px; margin-top: 16px;
}
.tarjeta h3 { margin: 0 0 10px; font-size: 14px; }
.tarjeta select, #nombre-envio {
  padding: 8px 10px; border: 1px solid var(--borde); border-radius: 7px; min-width: 260px;
}
.preview {
  background: #f9fafb; border: 1px solid var(--borde); border-radius: 7px;
  padding: 10px; margin: 10px 0 0; white-space: pre-wrap; font-size: 12.5px;
  font-family: inherit; color: var(--tenue);
}
.importar {
  border: 1px dashed var(--borde); border-radius: 7px;
  padding: 7px 14px; cursor: pointer; background: #fff;
}
.lista-contactos {
  max-height: 260px; overflow-y: auto; margin-top: 12px;
  border: 1px solid var(--borde); border-radius: 7px;
}
.lista-contactos label {
  display: flex; gap: 9px; align-items: center;
  padding: 7px 11px; border-bottom: 1px solid #f1f2f4;
}
.lista-contactos label:last-child { border-bottom: 0; }

.kb-layout { display: grid; grid-template-columns: 250px 1fr; gap: 16px; margin-top: 14px; }
.kb-archivos {
  background: var(--panel); border: 1px solid var(--borde);
  border-radius: var(--radio); padding: 10px;
}
.kb-archivos ul { list-style: none; margin: 0 0 8px; padding: 0; }
.kb-archivos li {
  padding: 7px 9px; border-radius: 6px; cursor: pointer; margin-bottom: 2px;
}
.kb-archivos li:hover { background: #f3f4f6; }
.kb-archivos li.seleccionado { background: #e8f5f2; }
.kb-file { display: block; font-size: 12.5px; font-weight: 600; }
.kb-archivos .mini { display: block; margin-top: 2px; line-height: 1.3; }
.kb-titulo { justify-content: space-between; margin-top: 0; }
@media (max-width: 820px) { .kb-layout { grid-template-columns: 1fr; } }

#conocimiento {
  width: 100%; min-height: 380px; padding: 14px;
  border: 1px solid var(--borde); border-radius: var(--radio);
  font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; line-height: 1.55;
}
.chat-prueba {
  margin-top: 12px; max-height: 380px; overflow-y: auto;
  background: #efeae2; border-radius: 8px; padding: 12px;
  display: flex; flex-direction: column; gap: 7px;
}
.burbuja-prueba {
  max-width: 78%; padding: 8px 11px; border-radius: 8px;
  background: #fff; box-shadow: 0 1px 1px rgba(0,0,0,.08);
  white-space: pre-wrap; word-break: break-word; align-self: flex-start;
}
.burbuja-prueba.mia { align-self: flex-end; background: var(--acento-claro); }
.burbuja-prueba.escalada { border-left: 4px solid #f59e0b; background: #fef9ec; }

.respuesta-prueba {
  margin-top: 12px; background: var(--acento-claro);
  border-radius: 8px; padding: 12px; white-space: pre-wrap;
}

.costo { margin-bottom: 12px; }
.costo strong { font-size: 17px; color: var(--acento); }

.tabla { width: 100%; border-collapse: collapse; font-size: 13px; }
.tabla th, .tabla td { text-align: left; padding: 7px 9px; border-bottom: 1px solid var(--borde); }
.tabla th { color: var(--tenue); font-weight: 600; font-size: 12px; }

.toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: #111827; color: #fff; padding: 11px 20px;
  border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,.25); z-index: 50;
}
.toast.error { background: var(--peligro); }

@media (max-width: 1100px) { .lateral { display: none !important; } }
@media (max-width: 760px) { .bandeja { width: 210px; } .burbuja { max-width: 85%; } }