/* ---------- Base ---------- */

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

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #202124;              /* fondo general oscuro */
  color: #f5f5f5;                   /* texto principal claro */
}

/* ---------- Tipografía ---------- */

h1, h2, h3, h4, h5, h6 {
  color: #ffffff;
  font-weight: 600;
}

a {
  color: #f4a200;
  text-decoration: none;
}

a:hover {
  color: #ffbe3d;
  text-decoration: underline;
}

/* Texto secundario (ayudas, descripciones) con más contraste */
.text-secondary,
.form-text {
  color: #c7c9cf !important;       /* antes muy oscuro, ahora gris claro */
}

/* ---------- Cabecera / logo ---------- */

.delta-logo {
  height: 32px;
  width: auto;
  vertical-align: middle;
}

/* ---------- Tarjetas ---------- */

.delta-card {
  background: #2b2f33;             /* algo más claro que el fondo de página */
  border-radius: 18px;
  border: 1px solid #41454b;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

/* ---------- Formularios ---------- */

.form-label {
  font-weight: 500;
  color: #ffffff;
}

.form-control,
.form-select,
.form-control-color {
  background-color: #1f2226;
  border: 1px solid #3a3f45;
  color: #f5f5f5;
}

.form-control:focus,
.form-select:focus,
.form-control-color:focus {
  background-color: #1f2226;
  border-color: #f4a200;
  box-shadow: 0 0 0 0.15rem rgba(244, 162, 0, 0.35);
  color: #ffffff;
}

.form-control::placeholder {
  color: #9b9fa7;
}

/* Checkboxes / radios */
.form-check-label {
  color: #e4e6eb;
}

/* ---------- Botones ---------- */

.btn-delta {
  background: linear-gradient(90deg, #f4a200, #ffbe3d);
  border: none;
  color: #1b1b1b;
  font-weight: 600;
  border-radius: 999px;
}

.btn-delta:hover {
  filter: brightness(1.06);
  color: #000000;
}

.btn-outline-light {
  border-color: #d3d6dc;
  color: #d3d6dc;
}

.btn-outline-light:hover {
  background-color: #d3d6dc;
  color: #1b1b1b;
}

/* ---------- Zona de QR / preview ---------- */

.qr-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #151618;
  border-radius: 18px;
  padding: 18px;
  min-height: 260px;
}

#qrCanvas {
  max-width: 100%;
  height: auto;
}

/* Texto bajo el QR */
#resultInfo {
  font-size: 0.9rem;
}

/* Enlace de descarga */
.download-link {
  display: inline-block;
  margin-top: 0.25rem;
  font-weight: 500;
}

/* ---------- Layout responsive ---------- */

@media (max-width: 991.98px) {
  .delta-card {
    margin-bottom: 1rem;
  }

  body {
    padding-bottom: 2rem;
  }
}