:root {
  --cz-blue: #1a56db;
  --cz-blue-dark: #1245b5;
  --bg: #f4f5f7;
  --text: #1a1a2e;
  --muted: #5f6b7a;
  --card: #ffffff;
  --radius: 14px;
  --wa: #25d366;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--text);
}
header.top {
  background: var(--cz-blue); color: #fff;
  padding: 14px 20px;
}
header.top .brand { font-weight: 700; font-size: 1.15rem; letter-spacing: .5px; }
header.top .brand span { color: #a5c8ff; }
main { max-width: 720px; margin: 0 auto; padding: 24px 16px 60px; }
.card {
  background: var(--card); border-radius: var(--radius);
  padding: 24px; box-shadow: 0 2px 12px rgba(0,0,0,.07); margin-bottom: 20px;
}
.card.intro h1 { font-size: 1.5rem; margin: 0 0 6px; }
.card.center { text-align: center; }
.card.cta { border-left: 4px solid var(--cz-blue); }
.seccion-label {
  font-size: .75rem; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--cz-blue); margin-bottom: 18px;
}
.pregunta { margin-bottom: 22px; }
.pregunta label { font-weight: 600; display: block; margin-bottom: 6px; }
.pregunta input[type=text],
.pregunta input[type=email],
.pregunta input[type=tel],
.pregunta textarea {
  width: 100%; padding: 10px 12px; font-size: 1rem;
  border: 1.5px solid #d1d5db; border-radius: 8px;
  font-family: inherit; margin-top: 6px;
}
.pregunta textarea { resize: vertical; min-height: 80px; }
.muted { color: var(--muted); }
.muted.small { font-size: .85rem; }
.req { color: #e53e3e; }
.error { background: #fff5f5; border: 1px solid #fc8181; color: #c53030;
         padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; }
.icono { font-size: 3rem; margin-bottom: 12px; }
/* NPS */
.nps-row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.nps-opt input { display: none; }
.nps-opt span {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 8px; cursor: pointer;
  border: 2px solid #d1d5db; font-weight: 600; font-size: .95rem;
  transition: all .15s;
}
.nps-opt input:checked + span { background: var(--cz-blue); color: #fff; border-color: var(--cz-blue); }
/* Escala 1-5 */
.escala-row { display: flex; gap: 10px; margin: 10px 0 4px; }
.escala-opt input { display: none; }
.escala-opt span {
  display: flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 50%; cursor: pointer;
  border: 2px solid #d1d5db; font-weight: 700; font-size: 1.1rem;
  transition: all .15s;
}
.escala-opt input:checked + span { background: var(--cz-blue); color: #fff; border-color: var(--cz-blue); }
.escala-labels { display: flex; justify-content: space-between; font-size: .8rem; color: var(--muted); }
/* Opciones */
.opciones { display: flex; flex-direction: column; gap: 10px; }
.opcion { display: flex; align-items: center; gap: 10px; cursor: pointer;
          padding: 10px 14px; border: 1.5px solid #e5e7eb; border-radius: 8px; }
.opcion input { flex-shrink: 0; width: 18px; height: 18px; cursor: pointer; }
/* Multi-select */
.opciones-multi { display: flex; flex-direction: column; gap: 10px; }
.opcion-check { display: flex; align-items: flex-start; gap: 10px; cursor: pointer;
                padding: 10px 14px; border: 1.5px solid #e5e7eb; border-radius: 8px; }
.opcion-check input { flex-shrink: 0; width: 18px; height: 18px; margin-top: 2px; cursor: pointer; }
.consentimiento { background: #f0f7ff; border: 1px solid #bfdbfe; border-radius: 8px;
                  padding: 14px; margin-top: 10px; }
.consentimiento a { color: var(--cz-blue); }
/* Botones */
.submit-row { text-align: center; margin-top: 8px; }
.btn-enviar {
  background: var(--cz-blue); color: #fff; border: none;
  padding: 14px 36px; font-size: 1.05rem; font-weight: 600;
  border-radius: 10px; cursor: pointer; width: 100%; max-width: 400px;
  transition: background .15s;
}
.btn-enviar:hover { background: var(--cz-blue-dark); }
.btn-wa {
  display: inline-block; background: var(--wa); color: #fff;
  padding: 14px 28px; border-radius: 10px; text-decoration: none;
  font-weight: 700; font-size: 1.05rem; margin: 14px 0;
}
.btn-export {
  background: #f3f4f6; border: 1px solid #d1d5db; padding: 6px 14px;
  border-radius: 6px; text-decoration: none; font-size: .85rem; color: var(--text);
}
.stats-row { display: flex; gap: 20px; margin-top: 8px; font-size: .9rem; color: var(--muted); flex-wrap: wrap; }
.tabla-resp { width: 100%; border-collapse: collapse; font-size: .85rem; }
.tabla-resp th, .tabla-resp td { text-align: left; padding: 6px 10px; border-bottom: 1px solid #f0f0f0; }
.tabla-resp th { background: #f9fafb; font-weight: 600; }
.small { font-size: .8rem; }
@media (max-width: 480px) {
  .nps-row { gap: 4px; }
  .nps-opt span { width: 32px; height: 32px; font-size: .85rem; }
}