html,
body {
  margin: 0;
  padding: 0;
  width: 100vw;
  min-height: 100vh;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  max-width: none;
}

/* iOS-style glassy outline button with hover/click light spot */
.pay-button {
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.15), 0 18px 45px rgba(0, 0, 0, 0.65);
}

.pay-button::before {
  content: "";
  position: absolute;
  inset: -40%;
  background:
    radial-gradient(circle at var(--spot-x, 30%) var(--spot-y, 0%), rgba(255, 255, 255, 0.45), transparent 55%),
    radial-gradient(circle at 15% 120%, rgba(96, 165, 250, 0.25), transparent 60%),
    radial-gradient(circle at 85% -20%, rgba(34, 211, 238, 0.2), transparent 55%);
  opacity: 0;
  transition: opacity 220ms ease-out, transform 220ms ease-out;
  pointer-events: none;
}

.pay-button:hover::before,
.pay-button:active::before,
.pay-button:focus-visible::before {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.pay-button span {
  position: relative;
  z-index: 1;
}