body {
  min-height: 100vh;
  color: #1e293b;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  margin: 0;
}

.spinner-overlay {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(0, 0, 0, 0.4);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;

  z-index: 9999;
  color: white;
  font-size: 1.4rem;
  font-weight: 600;
}

.progress-step {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 4px solid white;
  border-top-color: transparent;
  animation: spin 1s linear infinite;
  margin-bottom: 0.5rem;
}

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

footer {
  margin-top: 3rem;
  text-align: center;
  color: #888;
  font-size: 0.9rem;
  user-select: none;
  padding: 1rem 0;
}
.keypay-logo {
  display: inline-block;
  font-weight: 900; /* super bold */
  font-size: 1rem;
  font-family: 'Segoe UI Black', 'Arial Black', Arial, sans-serif;
  background: linear-gradient(90deg, #fbbf24, #f59e0b); /* yellow-orange gradient */
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  user-select: none;
  cursor: default;
  transition: filter 0.3s ease;
}
.keypay-logo::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 0.2rem;
  opacity: 0.7;
  z-index: -1;
}
.keypay-logo:hover {
  filter: brightness(1.2);
}

.input-group-text {
  border-left: none;
  padding: 0.375rem 0.5rem;
  background-color: #fff;
  justify-content: center;
  align-items: center;
}
#cardBrandIcon img {
  max-height: 28px;
  max-width: 28px;
  object-fit: contain;
  display: block;
}
.spinner-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.8);
  z-index: 1050;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
.progress-step {
  width: 3rem;
  height: 3rem;
  border: 0.4rem solid #007bff;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spinner 1s linear infinite;
  margin-bottom: 1rem;
}
@keyframes spinner {
  to {
    transform: rotate(360deg);
  }
}