/**
 * SKT buttons — bottom-to-top hover fill (red → white + red border).
 * Inset box-shadow draws a uniform 1px frame over the fill (avoids border stacking).
 */

button.skt-btn {
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  text-transform: uppercase;
  line-height: inherit;
  cursor: pointer;
  margin: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.skt-btn {
  color: #fff;
  border: none;
  background-color: var(--skt-red);
  background-image: linear-gradient(to top, #fff 50%, var(--skt-red) 50%);
  background-size: 100% 200%;
  background-position: center top;
  background-repeat: no-repeat;
  background-origin: padding-box;
  background-clip: padding-box;
  box-shadow: inset 0 0 0 1px var(--skt-red);
  overflow: hidden;
  isolation: isolate;
  transition:
    color 0.4s cubic-bezier(0.33, 1, 0.68, 1),
    background-position 0.45s cubic-bezier(0.33, 1, 0.68, 1);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.skt-btn::before,
.skt-btn::after {
  content: none;
  display: none;
}

.skt-btn:hover,
.skt-btn:focus-visible {
  color: var(--skt-red);
  border: none;
  background-position: center bottom;
  box-shadow: inset 0 0 0 1px var(--skt-red);
  outline: none;
}

.skt-btn--white {
  color: var(--skt-red);
  background-color: #fff;
  background-image: linear-gradient(to top, var(--skt-red) 50%, #fff 50%);
  box-shadow: inset 0 0 0 1px #fff;
}

.skt-btn--white:hover,
.skt-btn--white:focus-visible {
  color: #fff;
  background-position: center bottom;
  box-shadow: inset 0 0 0 1px #fff;
}

.skt-btn span {
  position: relative;
  z-index: 1;
}

@media (prefers-reduced-motion: reduce) {
  .skt-btn {
    transition: color 0.15s ease;
  }

  .skt-btn:hover,
  .skt-btn:focus-visible {
    background-position: center bottom;
  }
}