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);
}

.ab {
  box-sizing: border-box;
  width: min(100%, 400px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  border: 1px solid rgba(23, 20, 26, 0.16);
  border-radius: 16px;
  background: #fff7e6;
}

.ab__head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ab__face {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #0a4fe8;
  color: #fff7e6;
  font-size: 22px;
}

.ab__who {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.ab__name {
  color: #17141a;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.3;
}

.ab__role {
  color: rgba(23, 20, 26, 0.72);
  font-weight: 500;
  font-size: 11px;
  line-height: 1.3;
}

.ab__tabs {
  position: relative;
  display: flex;
  gap: 4px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(23, 20, 26, 0.16);
}

.ab__radio {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.ab__tab {
  flex: 0 0 auto;
  width: 72px;
  padding-top: 4px;
  padding-bottom: 4px;
  color: rgba(23, 20, 26, 0.72);
  font-weight: 500;
  font-size: 12px;
  line-height: 1.3;
  text-align: center;
  cursor: pointer;
}

.ab__radio:checked + .ab__tab {
  color: #17141a;
  font-weight: 700;
}

.ab__radio:focus-visible + .ab__tab {
  outline: 2px solid #0a4fe8;
  outline-offset: 2px;
  border-radius: 4px;
}

.ab__ink {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 72px;
  height: 3px;
  border-radius: 999px;
  background: #2f6df6;
  translate: 0 0;
  transition: translate 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.ab:has(#abT2:checked) .ab__ink {
  translate: 76px 0;
}

.ab:has(#abT3:checked) .ab__ink {
  translate: 152px 0;
}

.ab__body {
  display: grid;
  min-height: 72px;
}

.ab__body > * {
  grid-area: 1/1;
}

.ab__panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  opacity: 0;
  visibility: hidden;
}

.ab:has(#abT1:checked) .ab__panel--a,
.ab:has(#abT2:checked) .ab__panel--b,
.ab:has(#abT3:checked) .ab__panel--c {
  opacity: 1;
  visibility: visible;
}

.ab__line {
  margin: 0;
  color: #17141a;
  font-weight: 500;
  font-size: 12px;
  line-height: 1.5;
}

.ab__line--dim {
  color: rgba(23, 20, 26, 0.72);
}

.ab__row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
}

.ab__year {
  flex: 0 0 auto;
  color: #17141a;
  font-weight: 700;
  font-size: 11px;
  line-height: 1.5;
}

.ab__job {
  color: rgba(23, 20, 26, 0.72);
  font-weight: 500;
  font-size: 11px;
  line-height: 1.5;
}

.ab__mail {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #0a4fe8;
  color: #fff7e6;
  font-weight: 700;
  font-size: 12px;
  line-height: 1.2;
  text-decoration: none;
}

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

.ab__ico {
  display: grid;
  place-items: center;
  font-size: 14px;
}

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

.ab.is-demo .ab__panel,
.ab.is-demo .ab__tab {
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

.ab.is-demo .ab__panel--a {
  animation-name: abCutA;
}

.ab.is-demo .ab__panel--b {
  animation-name: abCutB;
}

.ab.is-demo .ab__panel--c {
  animation-name: abCutC;
}

.ab.is-demo .ab__tab[for=abT1] {
  animation-name: abTabA;
}

.ab.is-demo .ab__tab[for=abT2] {
  animation-name: abTabB;
}

.ab.is-demo .ab__tab[for=abT3] {
  animation-name: abTabC;
}

@keyframes abInk {
  0%, 25% {
    translate: 0 0;
  }
  33%, 58% {
    translate: 76px 0;
  }
  66%, 83% {
    translate: 152px 0;
  }
  91%, 100% {
    translate: 0 0;
  }
}
@keyframes abCutA {
  0% {
    opacity: 1;
    visibility: visible;
  }
  33% {
    opacity: 0;
    visibility: hidden;
  }
  66% {
    opacity: 0;
    visibility: hidden;
  }
  91% {
    opacity: 1;
    visibility: visible;
  }
  100% {
    opacity: 1;
    visibility: visible;
  }
}
@keyframes abCutB {
  0% {
    opacity: 0;
    visibility: hidden;
  }
  33% {
    opacity: 1;
    visibility: visible;
  }
  66% {
    opacity: 0;
    visibility: hidden;
  }
  100% {
    opacity: 0;
    visibility: hidden;
  }
}
@keyframes abCutC {
  0% {
    opacity: 0;
    visibility: hidden;
  }
  66% {
    opacity: 1;
    visibility: visible;
  }
  91% {
    opacity: 0;
    visibility: hidden;
  }
  100% {
    opacity: 0;
    visibility: hidden;
  }
}
@keyframes abTabA {
  0% {
    color: #17141a;
    font-weight: 700;
  }
  33% {
    color: rgba(23, 20, 26, 0.72);
    font-weight: 500;
  }
  91% {
    color: #17141a;
    font-weight: 700;
  }
  100% {
    color: #17141a;
    font-weight: 700;
  }
}
@keyframes abTabB {
  0% {
    color: rgba(23, 20, 26, 0.72);
    font-weight: 500;
  }
  33% {
    color: #17141a;
    font-weight: 700;
  }
  66% {
    color: rgba(23, 20, 26, 0.72);
    font-weight: 500;
  }
  100% {
    color: rgba(23, 20, 26, 0.72);
    font-weight: 500;
  }
}
@keyframes abTabC {
  0% {
    color: rgba(23, 20, 26, 0.72);
    font-weight: 500;
  }
  66% {
    color: #17141a;
    font-weight: 700;
  }
  91% {
    color: rgba(23, 20, 26, 0.72);
    font-weight: 500;
  }
  100% {
    color: rgba(23, 20, 26, 0.72);
    font-weight: 500;
  }
}
@media (max-width: 340px) {
  .ab {
    gap: 8px;
    padding: 8px;
  }
  .ab__head {
    gap: 8px;
  }
  .ab__face {
    width: 28px;
    height: 28px;
    font-size: 17px;
  }
  .ab__name {
    font-size: 13px;
  }
  .ab__role {
    font-size: 10px;
  }
  .ab__tabs {
    padding-bottom: 4px;
  }
  .ab__tab {
    padding-top: 0;
    padding-bottom: 0;
    font-size: 11px;
  }
  .ab__body {
    min-height: 56px;
  }
  .ab__panel {
    gap: 4px;
  }
  .ab__line {
    font-size: 11px;
  }
  .ab__year, .ab__job {
    font-size: 10px;
  }
  .ab__mail {
    padding: 4px 8px;
    font-size: 11px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ab.is-demo .ab__ink,
  .ab.is-demo .ab__panel,
  .ab.is-demo .ab__tab {
    animation: none !important;
    transition: none !important;
  }
}