:root {
  --bg: #050b14;
  --line: rgba(44, 240, 255, 0.28);
  --cyan: #2cf0ff;
  --ink: #eef7fb;
  --ink-2: #9fb7c3;
  --font: "Archivo", "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  font-family: var(--font);
  background: rgba(5, 11, 20, 0.96);
  color: var(--ink);
  line-height: 1.55;
}

.pagina-registro {
  width: min(640px, 100%);
  max-height: min(92vh, 900px);
  overflow: auto;
  position: relative;
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(10, 21, 34, 0.97), rgba(15, 28, 35, 0.98));
  padding: clamp(22px, 4vw, 36px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}

.corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  pointer-events: none;
}

.corner.tl {
  top: 8px;
  left: 8px;
  border-right: none;
  border-bottom: none;
}

.corner.tr {
  top: 8px;
  right: 8px;
  border-left: none;
  border-bottom: none;
}

.corner.bl {
  bottom: 8px;
  left: 8px;
  border-right: none;
  border-top: none;
}

.corner.br {
  bottom: 8px;
  right: 8px;
  border-left: none;
  border-top: none;
}

.hud {
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 8px;
}

.t-m {
  margin: 0;
  font-weight: 900;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.05;
}

.muted {
  color: var(--ink-2);
  margin: 8px 0 0;
}

.enlace-volver {
  display: inline-block;
  margin-top: 20px;
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
}

.enlace-volver:hover {
  text-decoration: underline;
}

.form-compra-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 16px;
  margin-top: 22px;
}

.form-compra-grid .ancho-completo {
  grid-column: 1 / -1;
}

.form-compra-grid label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 6px;
}

.form-compra-grid input,
.form-compra-grid select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: rgba(5, 11, 20, 0.6);
  color: var(--ink);
  font: inherit;
  border-radius: 2px;
}

.form-compra-grid input:focus-visible,
.form-compra-grid select:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  font: 900 15px/1 var(--font);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #04121a;
  border: 1px solid var(--cyan);
  background: var(--cyan);
  cursor: pointer;
  clip-path: polygon(
    12px 0,
    100% 0,
    100% calc(100% - 12px),
    calc(100% - 12px) 100%,
    0 100%,
    0 12px
  );
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn .tick {
  width: 8px;
  height: 8px;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.mensaje-error {
  color: #ff6b6b;
  font-size: 14px;
  margin: 12px 0 0;
}

.paso-confirmacion {
  margin-top: 22px;
}

.paso-confirmacion .lead {
  font-size: clamp(17px, 1.5vw, 20px);
  margin: 0;
}

#paso-datos[hidden],
.paso-confirmacion[hidden],
.mensaje-error[hidden],
.enlace-volver[hidden] {
  display: none !important;
}

@media (max-width: 640px) {
  .form-compra-grid {
    grid-template-columns: 1fr;
  }
}