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

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

.ko {
  display: grid;
  gap: 8px;
  width: 100%;
  max-width: 400px;
}

.ko__menu {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 8px 12px;
  border: 2px solid rgba(23, 20, 26, 0.14);
  border-radius: 12px;
  background: #ffffff;
  color: #17141a;
}

.ko__ico {
  width: clamp(16px, 4.4vw, 20px);
  height: clamp(16px, 4.4vw, 20px);
  flex: 0 0 auto;
}

.ko__name {
  flex: 1 1 auto;
  font-weight: 800;
  font-size: clamp(12px, 3.2vw, 15px);
}

.ko__price {
  font-weight: 800;
  font-size: clamp(12px, 3.2vw, 15px);
}

.ko__sheet {
  padding: 8px 12px 12px;
  border-radius: 16px;
  background: #fff7e6;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

.ko__steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
  margin-bottom: 8px;
}

.ko__seg {
  display: block;
  height: 6px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.16);
}

.ko__seg--1 {
  background: #17141a;
}

.ko.is-step2 .ko__seg--2 {
  background: #17141a;
}

.ko__panes {
  display: grid;
}

.ko__pane {
  grid-area: 1/1;
}

.ko:not(.is-step2) .ko__pane--2,
.ko.is-step2 .ko__pane--1 {
  visibility: hidden;
  opacity: 0;
}

.ko__title {
  margin: 0 0 8px;
  font-weight: 800;
  font-size: clamp(13px, 3.6vw, 16px);
  line-height: 1.2;
  color: #17141a;
}

.ko__opts {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 8px;
}

.ko__opt {
  width: 100%;
  padding: 8px 4px;
  cursor: pointer;
  border: 2px solid rgba(23, 20, 26, 0.18);
  border-radius: 12px;
  background: #ffffff;
  color: #17141a;
  font-family: inherit;
  font-weight: 700;
  font-size: clamp(11px, 3vw, 14px);
}

.ko__opt.is-on {
  border-color: #2f6df6;
  border-width: 3px;
  font-weight: 800;
}

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

.ko__nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-top: 12px;
}

.ko__back, .ko__next {
  width: 100%;
  padding: 8px;
  cursor: pointer;
  border-radius: 12px;
  font-family: inherit;
  font-weight: 800;
  font-size: clamp(11px, 3vw, 14px);
}

.ko__back {
  border: 2px solid rgba(23, 20, 26, 0.24);
  background: #ffffff;
  color: #17141a;
}

.ko__next {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: 0;
  background: #17141a;
  color: #fff7e6;
}

.ko__back:disabled, .ko__next:disabled {
  opacity: 0.38;
  cursor: default;
}

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

.ko__caret {
  width: clamp(13px, 3.4vw, 16px);
  height: clamp(13px, 3.4vw, 16px);
  flex: 0 0 auto;
}

.ko.is-demo .ko__pane--1,
.ko.is-demo .ko__pane--2 {
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

.ko.is-demo .ko__pane--1 {
  animation-name: koPane1;
}

.ko.is-demo .ko__pane--2 {
  animation-name: koPane2;
}

@keyframes koPane1 {
  0%, 46% {
    visibility: visible;
    opacity: 1;
  }
  50%, 82% {
    visibility: hidden;
    opacity: 0;
  }
  86%, 100% {
    visibility: visible;
    opacity: 1;
  }
}
@keyframes koPane2 {
  0%, 46% {
    visibility: hidden;
    opacity: 0;
  }
  50%, 82% {
    visibility: visible;
    opacity: 1;
  }
  86%, 100% {
    visibility: hidden;
    opacity: 0;
  }
}
.ko.is-demo .ko__seg--2 {
  animation-name: koSeg;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

@keyframes koSeg {
  0%, 46% {
    background: rgba(23, 20, 26, 0.16);
  }
  50%, 82% {
    background: #17141a;
  }
  86%, 100% {
    background: rgba(23, 20, 26, 0.16);
  }
}
.ko.is-demo .ko__back,
.ko.is-demo .ko__next {
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

.ko.is-demo .ko__back {
  animation-name: koBack;
}

.ko.is-demo .ko__next {
  animation-name: koNext;
}

@keyframes koBack {
  0%, 46% {
    opacity: 0.38;
  }
  50%, 82% {
    opacity: 1;
  }
  86%, 100% {
    opacity: 0.38;
  }
}
@keyframes koNext {
  0%, 46% {
    opacity: 1;
  }
  50%, 82% {
    opacity: 0.38;
  }
  86%, 100% {
    opacity: 1;
  }
}
.ko.is-demo .ko__caret {
  animation-name: koCaret;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

@keyframes koCaret {
  0%, 100% {
    transform: translateX(0);
  }
  22% {
    transform: translateX(4px);
  }
  44% {
    transform: translateX(0);
  }
  66% {
    transform: translateX(4px);
  }
  88% {
    transform: translateX(0);
  }
}
@media (max-width: 340px) {
  .ko__menu {
    padding: 4px 8px;
  }
  .ko__sheet {
    padding: 8px;
  }
  .ko__title {
    margin-bottom: 4px;
  }
  .ko__nav {
    margin-top: 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ko.is-demo .ko__pane--1,
  .ko.is-demo .ko__pane--2,
  .ko.is-demo .ko__seg--2,
  .ko.is-demo .ko__back,
  .ko.is-demo .ko__next,
  .ko.is-demo .ko__caret {
    animation: none !important;
  }
  .ko.is-demo .ko__back {
    opacity: 1 !important;
  }
  .ko.is-demo .ko__next {
    opacity: 0.38 !important;
  }
  .ko.is-demo .ko__pane--1 {
    visibility: hidden !important;
    opacity: 0 !important;
  }
  .ko.is-demo .ko__pane--2 {
    visibility: visible !important;
    opacity: 1 !important;
  }
  .ko.is-demo .ko__seg--2 {
    background: #17141a !important;
  }
}