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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.dfr {
  position: relative;
  width: 100%;
  max-width: 240px;
  display: grid;
  gap: 12px;
}

.dfr__list {
  display: grid;
  gap: 8px;
}

.dfr__item {
  height: 32px;
  border-radius: 8px;
  background: #17141a;
  color: #fff7e6;
  display: flex;
  align-items: center;
  padding: 0 12px;
  font: 600 12px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  will-change: transform, opacity;
}

.dfr__zone {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  border: 2px dashed rgba(23, 20, 26, 0.35);
}

.dfr__zoneLabel {
  font: 700 11px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: #17141a;
}

.dfr__zoneSlot {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: #4cd4a6;
}

.dfr__btn {
  width: 100%;
  border: 0;
  border-radius: 12px;
  padding: 8px 16px;
  background: #17141a;
  color: #fff7e6;
  font: 700 12px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  cursor: pointer;
  transition: transform 140ms ease-out;
}
.dfr__btn:active {
  transform: scale(0.96);
}

@media (max-width: 340px) {
  .dfr {
    max-width: 195px;
  }
  .dfr__item {
    height: 28px;
    font-size: 11px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .dfr__btn {
    transition: none;
  }
}