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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.kr {
  --cell: clamp(30px, 9.5vw, 52px);
  width: 100%;
  max-width: 420px;
  display: grid;
  grid-template-columns: minmax(88px, 38%) 1fr;
  gap: 12px;
  align-items: stretch;
}

.kr__rail {
  position: relative;
  align-self: end;
}

.kr__mark {
  position: absolute;
  left: -4px;
  right: -4px;
  top: -4px;
  height: calc(var(--cell) + 8px);
  border-radius: 16px;
  background: #17141a;
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.kr__tabs {
  position: relative;
  display: grid;
  grid-template-rows: repeat(4, var(--cell));
  gap: 8px;
}

.kr__tab {
  box-sizing: border-box;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  cursor: pointer;
  border: 2px solid rgba(23, 20, 26, 0.18);
  border-radius: 12px;
  background: #fff7e6;
  color: #17141a;
  font-family: inherit;
  font-weight: 800;
  font-size: clamp(11px, 3vw, 14px);
  line-height: 1.2;
  text-align: left;
}

.kr__tab:focus-visible {
  outline: 3px solid #2f6df6;
  outline-offset: 4px;
}

.kr__tab[aria-selected=true] {
  border-color: #17141a;
}

.kr__ico {
  width: clamp(14px, 4.4vw, 20px);
  height: clamp(14px, 4.4vw, 20px);
  flex: 0 0 auto;
}

.kr__panels {
  display: grid;
}

.kr__panel {
  grid-area: 1/1;
  box-sizing: border-box;
  padding: 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 2px solid rgba(23, 20, 26, 0.18);
  border-radius: 16px;
  background: #ffffff;
  color: #17141a;
  opacity: 0;
  visibility: hidden;
}

.kr__panel:focus-visible {
  outline: 3px solid #2f6df6;
  outline-offset: 2px;
}

.kr[data-sel="1"] .kr__panel--1,
.kr[data-sel="2"] .kr__panel--2,
.kr[data-sel="3"] .kr__panel--3,
.kr[data-sel="4"] .kr__panel--4 {
  opacity: 1;
  visibility: visible;
}

.kr[data-sel="2"] .kr__mark {
  transform: translateY(calc(var(--cell) + 8px));
}

.kr[data-sel="3"] .kr__mark {
  transform: translateY(calc((var(--cell) + 8px) * 2));
}

.kr[data-sel="4"] .kr__mark {
  transform: translateY(calc((var(--cell) + 8px) * 3));
}

.kr__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin: 0;
  padding: 4px 0;
  font-weight: 700;
  font-size: clamp(11px, 3vw, 14px);
  line-height: 1.3;
}

.kr__row + .kr__row {
  border-top: 1px solid rgba(23, 20, 26, 0.12);
}

.kr__price {
  font-weight: 800;
  font-style: normal;
  white-space: nowrap;
}

.kr.is-demo .kr__mark {
  animation-name: krMark;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

@keyframes krMark {
  0%, 25% {
    transform: translateY(0);
  }
  40%, 65% {
    transform: translateY(calc(var(--cell) + 8px));
  }
  80%, 100% {
    transform: translateY(0);
  }
}
.kr.is-demo .kr__panel--1 {
  animation-name: krPanelA;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

.kr.is-demo .kr__panel--2 {
  animation-name: krPanelB;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

@keyframes krPanelA {
  0% {
    opacity: 1;
    visibility: visible;
  }
  40% {
    opacity: 0;
    visibility: hidden;
  }
  80%, 100% {
    opacity: 1;
    visibility: visible;
  }
}
@keyframes krPanelB {
  0% {
    opacity: 0;
    visibility: hidden;
  }
  40% {
    opacity: 1;
    visibility: visible;
  }
  80%, 100% {
    opacity: 0;
    visibility: hidden;
  }
}
.kr.is-demo .kr__tab {
  animation-name: krTabEdge;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

.kr.is-demo .kr__tab:nth-child(2) {
  animation-name: krTabEdge2;
}

.kr.is-demo .kr__tab:nth-child(3),
.kr.is-demo .kr__tab:nth-child(4) {
  animation-name: none;
}

@keyframes krTabEdge {
  0% {
    border-color: #17141a;
  }
  40% {
    border-color: rgba(23, 20, 26, 0.18);
  }
  80%, 100% {
    border-color: #17141a;
  }
}
@keyframes krTabEdge2 {
  0% {
    border-color: rgba(23, 20, 26, 0.18);
  }
  40% {
    border-color: #17141a;
  }
  80%, 100% {
    border-color: rgba(23, 20, 26, 0.18);
  }
}
@media (max-width: 340px) {
  .kr {
    gap: 8px;
  }
  .kr__tabs {
    gap: 4px;
  }
  .kr[data-sel="2"] .kr__mark {
    transform: translateY(calc(var(--cell) + 4px));
  }
  .kr[data-sel="3"] .kr__mark {
    transform: translateY(calc((var(--cell) + 4px) * 2));
  }
  .kr[data-sel="4"] .kr__mark {
    transform: translateY(calc((var(--cell) + 4px) * 3));
  }
  @keyframes krMark {
    0%, 25% {
      transform: translateY(0);
    }
    40%, 65% {
      transform: translateY(calc(var(--cell) + 4px));
    }
    80%, 100% {
      transform: translateY(0);
    }
  }
}
@media (prefers-reduced-motion: reduce) {
  .kr.is-demo .kr__mark,
  .kr.is-demo .kr__panel--1,
  .kr.is-demo .kr__panel--2,
  .kr.is-demo .kr__tab {
    animation: none !important;
  }
  .kr.is-demo .kr__mark {
    transform: translateY(0) !important;
  }
  .kr.is-demo .kr__panel--1 {
    opacity: 1 !important;
    visibility: visible !important;
  }
  .kr.is-demo .kr__panel--2 {
    opacity: 0 !important;
    visibility: hidden !important;
  }
}