html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.copyBtn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  border-radius: 999px;
  padding: 12px 20px;
  background: #c2361a;
  color: #fff7e6;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 600;
  font-size: 14px;
  line-height: 1.3;
  cursor: pointer;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

.icon {
  width: 18px;
  height: 18px;
  flex: none;
}

.label {
  white-space: nowrap;
}

.hint {
  margin: 0;
  color: rgba(255, 247, 230, 0.72);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-size: 12px;
  line-height: 1.4;
}

.hint.is-ok {
  color: #4cd4a6;
}

@media (max-width: 340px) {
  .copyBtn {
    padding: 8px 16px;
    font-size: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .copyBtn {
    transition: none;
  }
}