/*******************************************************************************
 * Base Button
 ******************************************************************************/
.base-button {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* button image */
.base-button__img {
  --image_width: 15.5em;
  --image_height: 2.75em;

  position: relative;
  width: var(--image_width);
  height: var(--image_height);

  z-index: 0;
  margin: 0;
  padding: 0;
  user-select: none;
  pointer-events: none;
  display: inline-block;
  vertical-align: middle;
  filter: brightness(0.92) contrast(1) saturate(1);
}

/* label over the image */
.base-button__label_gold,
.base-button__label_silver {
  --font-size: 0.92em;

  position: absolute;
  z-index: 1;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 0 1.125px; /* breathing room for long text */
  font-weight: 900;
  font-size: var(--font-size);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.base-button__label_gold {
  color: #161106;
  text-shadow:
    0 1px 0 rgba(225, 225, 225, 0.1),
    0 5px 10px rgba(0, 0, 0, 0.3);
}

.base-button__label_silver {
  color: hsl(45, 0%, 5%);
  text-shadow:
    0 1px 0 rgba(225, 225, 225, 0.1),
    0 5px 10px rgba(0, 0, 0, 0.3);
}

/*******************************************************************************
 * Effects
 ******************************************************************************/
/* subtle “lift” on hover */
.base-button:hover {
  opacity: 1.1;
  transform: translateY(-0.06em);
}
.base-button:hover .base-button__img {
  filter: brightness(1.05) contrast(1.05) saturate(1.1);
}

/* shimmering highlight */
.base-button::before {
  content: "";
  position: absolute;
  z-index: 3;
  pointer-events: none;

  top: 5%;
  bottom: 5%;
  left: -2.5em;
  width: 9.4em;

  border-radius: 2px;
  background: linear-gradient(
    115deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0) 38%,
    rgba(255, 255, 255, 0.55) 50%,
    rgba(255, 255, 255, 0) 62%,
    rgba(255, 255, 255, 0) 100%
  );

  filter: blur(0.06em);
  transform: translate3d(-50%, 0, 0) skewX(-18deg);
  inset: 5px;
  transition:
    transform 2000ms ease,
    opacity 200ms ease;
  opacity: 0.1;
  will-change: transform, opacity;
}

.base-button:hover::before {
  transform: translate3d(50%, 0, 0) skewX(-18deg);
}

/* pressed state */
.base-button:active {
  transform: translateY(0.06em) scale(0.992);
}

.base-button:active .base-button__img {
  filter: brightness(0.85) contrast(1.1) saturate(1.2);
}

.base-button:active::before {
  opacity: 0.25;
  transition: opacity 80ms ease;
}

/* focus for keyboard */
.base-button:focus-visible {
  outline: 2px solid rgba(255, 214, 102, 0.65);
  outline-offset: 4px;
}

/* disabled */
.base-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.base-button:disabled::before {
  display: none;
}