.specular-button {
  --sb-radius: 18px;
  --sb-tint: #ffffff;
  --sb-tint-opacity: 0;
  --sb-blur: 0px;
  --sb-text-color: #f5f5f5;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  margin: 0;
  font-family: inherit;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1;
  color: var(--sb-text-color);
  background: color-mix(in srgb, var(--sb-tint) calc(var(--sb-tint-opacity) * 100%), transparent);
  border-radius: var(--sb-radius);
  backdrop-filter: blur(var(--sb-blur));
  -webkit-backdrop-filter: blur(var(--sb-blur));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    0 8px 24px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  outline: none;
  transition: transform 0.15s ease;
}
.specular-button:active {
  transform: scale(0.97);
}
.specular-button:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--sb-text-color) 60%, transparent);
  outline-offset: 3px;
}
.specular-button:disabled {
  opacity: 0.55;
  cursor: default;
}
.specular-button:disabled:active {
  transform: none;
}
.specular-button--sm {
  font-size: 0.85rem;
  padding: 10px 22px;
}
.specular-button--md {
  font-size: 1rem;
  padding: 14px 30px;
}
.specular-button--lg {
  font-size: 1.15rem;
  padding: 18px 40px;
}
/* Canvas extends past the button so the rim glow can bleed outside the edge */
.specular-button__fx {
  position: absolute;
  inset: -20px;
  pointer-events: none;
  z-index: 1;
}
.specular-button__fx canvas {
  display: block;
  width: 100%;
  height: 100%;
}
.specular-button__label {
  position: relative;
  z-index: 2;
}