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);
}

.sst {
  width: min(280px, 84vw);
  color: #17141a;
  text-align: center;
}

.sst__track {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.18);
  margin: 40px 0 16px;
}

.sst__fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 25%;
  background: #c93000;
  border-radius: 999px;
}

.sst__tick {
  position: absolute;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.35);
  transform: translate(-50%, -50%);
}

.sst__thumb {
  position: absolute;
  top: 50%;
  left: 25%;
  width: 18px;
  height: 18px;
  appearance: none;
  border: 0;
  border-radius: 50%;
  background: #17141a;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  cursor: grab;
  touch-action: none;
  padding: 0;
  transform: translate(-50%, -50%);
}

.sst__thumb:active {
  cursor: grabbing;
}

.sst__thumb:focus-visible {
  outline: 2px solid #17141a;
  outline-offset: 2px;
}

.sst__label {
  margin: 8px 0 0;
  font-weight: 700;
  font-size: 16px;
}

@media (max-width: 340px) {
  .sst {
    width: min(240px, 80vw);
  }
  .sst__label {
    font-size: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .sst__thumb {
    transition: none;
  }
}