:root {
  --bg: #070b14;
  --bg-2: #0d1424;
  --panel: rgba(19, 26, 44, 0.72);
  --panel-borde: rgba(124, 108, 255, 0.22);
  --texto: #e6eaf2;
  --texto-suave: #97a3ba;
  --acento: #7c6cff;
  --acento-2: #22d3ee;
  --gradiente: linear-gradient(135deg, #7c6cff 0%, #22d3ee 100%);
  --ok: #34d399;
  --error: #f87171;
  --radio: 16px;
  --sombra: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--texto);
  background: var(--bg);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.fondo {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(124, 108, 255, 0.22), transparent 60%),
    radial-gradient(800px 500px at 90% 10%, rgba(34, 211, 238, 0.16), transparent 60%),
    radial-gradient(700px 600px at 50% 110%, rgba(124, 108, 255, 0.12), transparent 60%),
    var(--bg-2);
}

.contenedor {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* Cabecera */
.cabecera {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

.marca { display: flex; align-items: center; gap: 12px; }

.logo {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: rgba(124, 108, 255, 0.12);
  border: 1px solid var(--panel-borde);
}

.marca-texto { display: flex; flex-direction: column; }
.marca-nombre { font-weight: 700; font-size: 15px; letter-spacing: 0.2px; }
.marca-sub { font-size: 12px; color: var(--texto-suave); }

.insignia {
  font-size: 12px;
  font-weight: 600;
  color: #34d399;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.3);
  padding: 6px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

/* Hero */
.hero { margin-bottom: 28px; }

.titulo {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 800;
  margin: 0 0 8px;
  background: var(--gradiente);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.5px;
}

.subtitulo {
  margin: 0;
  font-size: 16px;
  color: var(--texto-suave);
  max-width: 560px;
}

.meta-evento {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--texto-suave);
  background: var(--panel);
  border: 1px solid var(--panel-borde);
  padding: 7px 12px;
  border-radius: 999px;
}

.meta-item svg { color: var(--acento-2); }

/* Patrocinantes */
.patrocinantes { margin: 0 0 30px; }

.patrocinantes-fila {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

.patrocinante {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.patrocinante-factorceo {
  background: #ffffff;
  border-radius: 14px;
  padding: 10px;
}

.patrocinante img {
  display: block;
  height: 46px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
}

/* Formulario */
form {
  background: var(--panel);
  border: 1px solid var(--panel-borde);
  border-radius: 20px;
  padding: 28px;
  backdrop-filter: blur(14px);
  box-shadow: var(--sombra);
}

/* Progreso */
.progreso {
  list-style: none;
  display: flex;
  margin: 0 0 16px;
  padding: 0;
  gap: 6px;
}

.progreso-paso {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--texto-suave);
  text-align: center;
  transition: color 0.25s;
}

.progreso-paso span {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 2px solid rgba(151, 163, 186, 0.4);
  font-weight: 700;
  transition: all 0.25s;
}

.progreso-paso.activo { color: var(--texto); }
.progreso-paso.activo span {
  border-color: transparent;
  background: var(--gradiente);
  color: #fff;
  box-shadow: 0 0 0 4px rgba(124, 108, 255, 0.18);
}
.progreso-paso.completo span {
  border-color: transparent;
  background: var(--ok);
  color: #04251a;
}

.progreso-barra {
  height: 4px;
  background: rgba(151, 163, 186, 0.18);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 24px;
}

.progreso-relleno {
  height: 100%;
  width: 25%;
  background: var(--gradiente);
  border-radius: 99px;
  transition: width 0.35s ease;
}

/* Pasos */
.paso { display: none; border: none; margin: 0; padding: 0; }
.paso.activo { display: block; animation: entrada 0.35s ease; }

@keyframes entrada {
  from { opacity: 0; transform: translateX(18px); }
  to { opacity: 1; transform: translateX(0); }
}

legend {
  font-size: 20px;
  font-weight: 700;
  padding: 0;
  margin-bottom: 4px;
}

.paso-desc { margin: 0 0 20px; font-size: 14px; color: var(--texto-suave); }

/* Campos */
.campo { margin-bottom: 18px; }

.campo label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 7px;
}

.campo label em, .checkbox em { color: var(--error); font-style: normal; }
.opcional { color: var(--texto-suave); font-weight: 400; }

.campo input,
.campo select,
.campo textarea {
  width: 100%;
  font: inherit;
  font-size: 15px;
  color: var(--texto);
  background: rgba(9, 13, 24, 0.6);
  border: 1px solid rgba(151, 163, 186, 0.28);
  border-radius: 12px;
  padding: 12px 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.campo textarea { resize: vertical; min-height: 88px; }

.campo select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  cursor: pointer;
}

.telefono-grupo { display: flex; gap: 10px; }

.telefono-grupo select {
  flex: 0 0 auto;
  width: 104px;
  font-size: 14px;
  padding-right: 30px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2397a3ba' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.telefono-grupo input { flex: 1; min-width: 0; }

.campo input::placeholder,
.campo textarea::placeholder { color: #5c6780; }

.campo input:focus,
.campo select:focus,
.campo textarea:focus {
  outline: none;
  border-color: var(--acento);
  box-shadow: 0 0 0 4px rgba(124, 108, 255, 0.18);
}

.campo.invalido input,
.campo.invalido select,
.campo.invalido textarea {
  border-color: var(--error);
  box-shadow: 0 0 0 4px rgba(248, 113, 113, 0.15);
}

.error {
  display: block;
  min-height: 0;
  font-size: 12px;
  color: var(--error);
  margin-top: 5px;
}

/* Checkboxes */
.campo-check { margin-bottom: 16px; }
.campo-check .error { display: block; }

.checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  font-size: 13px;
  color: var(--texto-suave);
}

.checkbox input { position: absolute; opacity: 0; pointer-events: none; }

.caja {
  flex: 0 0 20px;
  width: 20px; height: 20px;
  margin-top: 1px;
  border: 2px solid rgba(151, 163, 186, 0.5);
  border-radius: 6px;
  display: grid; place-items: center;
  transition: all 0.2s;
  background: rgba(9, 13, 24, 0.6);
}

.checkbox input:checked + .caja {
  background: var(--gradiente);
  border-color: transparent;
}
.checkbox input:checked + .caja::after {
  content: "";
  width: 5px; height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translateY(-1px);
}

.checkbox input:focus-visible + .caja {
  box-shadow: 0 0 0 4px rgba(124, 108, 255, 0.25);
}

.enlace { color: var(--acento-2); text-decoration: none; }
.enlace:hover { text-decoration: underline; }

/* Resumen */
.resumen {
  margin: 0 0 20px;
  background: rgba(9, 13, 24, 0.5);
  border: 1px solid rgba(151, 163, 186, 0.2);
  border-radius: 12px;
  padding: 16px 18px;
  display: grid;
  gap: 10px;
}

.resumen div { display: flex; justify-content: space-between; gap: 16px; font-size: 13px; }

.resumen dt { color: var(--texto-suave); flex: 0 0 42%; }
.resumen dd { margin: 0; text-align: right; color: var(--texto); word-break: break-word; }

/* Navegación */
.navegacion {
  display: flex;
  gap: 12px;
  margin-top: 26px;
}

.btn {
  font: inherit;
  font-weight: 600;
  font-size: 15px;
  border-radius: 12px;
  padding: 13px 22px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s, opacity 0.2s, box-shadow 0.2s;
}

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-sec {
  background: transparent;
  border-color: rgba(151, 163, 186, 0.35);
  color: var(--texto-suave);
}

.btn-sec:hover:not(:disabled) { color: var(--texto); border-color: var(--texto-suave); }

.btn-pri {
  margin-left: auto;
  background: var(--gradiente);
  color: #fff;
  box-shadow: 0 8px 24px rgba(124, 108, 255, 0.35);
}

.btn-pri:hover { box-shadow: 0 10px 30px rgba(124, 108, 255, 0.5); }

.btn-enviar {
  margin-left: auto;
  width: 100%;
  background: var(--gradiente);
  color: #fff;
  box-shadow: 0 8px 24px rgba(52, 211, 153, 0.28);
}

.aviso { margin: 18px 0 0; font-size: 12px; color: var(--texto-suave); text-align: center; }
.aviso em { color: var(--error); font-style: normal; }

/* Mensaje de éxito */
.exito {
  text-align: center;
  padding: 20px 0;
}

.exito-icono {
  width: 68px; height: 68px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: rgba(52, 211, 153, 0.15);
  border: 1px solid rgba(52, 211, 153, 0.4);
  display: grid; place-items: center;
  font-size: 34px;
  color: var(--ok);
}

.exito h2 { margin: 0 0 8px; font-size: 24px; }
.exito p { margin: 0; color: var(--texto-suave); font-size: 14px; }

/* Spinner */
.spinner {
  width: 18px; height: 18px;
  border: 3px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: girar 0.7s linear infinite;
  margin: 0 auto;
}

@keyframes girar { to { transform: rotate(360deg); } }

/* Alerta global */
.alerta {
  display: none;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  margin-bottom: 18px;
}

.alerta.error {
  display: block;
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: var(--error);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 14, 0.7);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 50;
}

.modal[hidden] { display: none; }

.modal-caja {
  background: #0d1424;
  border: 1px solid var(--panel-borde);
  border-radius: 16px;
  max-width: 520px;
  width: 100%;
  padding: 26px;
  position: relative;
  max-height: 80vh;
  overflow: auto;
}

.modal-caja h2 { margin: 0 0 12px; font-size: 20px; }
.modal-cuerpo p { color: var(--texto-suave); font-size: 14px; margin: 0 0 12px; }
.modal-cuerpo p:last-child { margin-bottom: 0; }

.modal-cerrar {
  position: absolute;
  top: 12px; right: 16px;
  background: none;
  border: none;
  color: var(--texto-suave);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
}

.modal-cerrar:hover { color: var(--texto); }

@media (max-width: 520px) {
  form { padding: 20px 18px; }
  .progreso-paso { font-size: 10px; }
  .resumen dt { flex-basis: 50%; }
  .patrocinantes-fila { flex-wrap: nowrap; align-items: center; gap: 14px; }
  .patrocinante { flex: 1 1 0; min-width: 0; }
  .patrocinante img { height: auto; max-width: 100%; }
  .logo-s24 { max-height: 44px; }
  .logo-istmad { max-height: 64px; }
  .logo-factorceo { max-height: 92px; }
  .telefono-grupo { gap: 8px; }
  .telefono-grupo select {
    width: 96px;
    font-size: 13px;
    padding-left: 8px;
    padding-right: 22px;
    background-position: right 6px center;
  }
}