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);
}

.feature-list {
  margin: 0;
  padding: 0;
  list-style: none;
  width: min(340px, 88vw);
}
.feature-list__row {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 16px;
  padding: 12px 0;
  animation: row-shift 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}
.feature-list__row:nth-child(1) {
  animation-delay: 0s;
}
.feature-list__row:nth-child(2) {
  animation-delay: -0.25s;
}
.feature-list__row:nth-child(3) {
  animation-delay: -0.5s;
}
.feature-list__index {
  color: #2f6df6;
  font-weight: 800;
  font-size: clamp(20px, 6vw, 32px);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.feature-list__label {
  position: relative;
  display: inline-block;
  color: #17141a;
  font-weight: 700;
  font-size: clamp(14px, 4vw, 20px);
  line-height: 1.2;
}
.feature-list__label::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: #2f6df6;
  transform-origin: left center;
  transform: scaleX(0);
  animation: underline-grow 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}
.feature-list__row:nth-child(1) .feature-list__label::after {
  animation-delay: 0s;
}
.feature-list__row:nth-child(2) .feature-list__label::after {
  animation-delay: -0.25s;
}
.feature-list__row:nth-child(3) .feature-list__label::after {
  animation-delay: -0.5s;
}

.char {
  display: inline-block;
  animation: char-flow 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.char--space {
  width: 0.28em;
}

@keyframes char-flow {
  0%, 4% {
    transform: translate(var(--nx0, 0), var(--ny0, 10px)) rotate(var(--nr0, 0deg)) scale(0.55);
    opacity: 0;
  }
  16% {
    transform: translate(var(--wx, 0), var(--wy, 3px)) rotate(var(--wr, 0deg)) scale(1.08);
    opacity: 1;
  }
  30%, 78% {
    transform: translate(0, 0) rotate(0deg) scale(1);
    opacity: 1;
  }
  96%, 100% {
    transform: translate(var(--nx0, 0), var(--ny0, 10px)) rotate(var(--nr0, 0deg)) scale(0.55);
    opacity: 0;
  }
}
@keyframes row-shift {
  0%, 10% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(10px);
  }
  90%, 100% {
    transform: translateX(0);
  }
}
@keyframes underline-grow {
  0%, 10% {
    transform: scaleX(0);
  }
  50% {
    transform: scaleX(1);
  }
  90%, 100% {
    transform: scaleX(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .feature-list__row {
    animation: none;
    transform: none;
  }
  .feature-list__label::after {
    animation: none;
    transform: scaleX(0);
  }
  .char {
    animation: none;
    transform: none;
    opacity: 1;
  }
}