/* skin-aware */
.pad {
  width: 100%;
  min-height: 300px;
  border: 0;
  border-radius: 22px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.5vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  color: #fff;
  cursor: pointer;
  transition: background 0.28s var(--ease), transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
  box-shadow: 0 18px 40px rgba(16, 24, 32, 0.18);
}

.pad:hover {
  transform: scale(1.015);
}

.pad:active {
  transform: scale(0.99);
}

.pad.is-idle {
  background:
    radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.14), transparent 40%),
    linear-gradient(145deg, #3f5160, #1c2730);
}

.pad.is-wait {
  background:
    radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.16), transparent 42%),
    linear-gradient(145deg, #e15a3c, #a33a26);
  animation: wait-pulse 1.1s var(--ease) infinite;
}

.pad.is-go {
  background:
    radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.22), transparent 42%),
    linear-gradient(145deg, #2dd4bf, #0a7a6f);
  animation: go-pop 0.35s var(--ease);
}

.pad.is-fail {
  background: linear-gradient(145deg, #7a2f24, #3f1712);
}

.pad.is-result {
  background: linear-gradient(145deg, #14212b, #24313b);
}

@keyframes wait-pulse {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.06); }
}

@keyframes go-pop {
  from { transform: scale(0.98); }
  to { transform: scale(1); }
}