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);
}

.navpaper {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  gap: 16px;
  width: clamp(268px, 82vw, 372px);
  padding: 12px 16px;
  border-radius: 999px;
  background: #fbf6ec;
  box-shadow: 0 6px 0 #e7dccb;
}

.navpaper__brand {
  flex: 0 0 auto;
  color: #2a2320;
  font-weight: 800;
  font-size: 14px;
  line-height: 1;
  font-family: inherit;
  white-space: nowrap;
}

.navpaper__tabs {
  position: relative;
  display: flex;
  gap: 4px;
  --step: 76px;
}

.navpaper__chip {
  position: absolute;
  left: 0;
  top: -4px;
  width: 72px;
  height: calc(100% + 8px);
  border-radius: 12px;
  background: #d6c9ab;
  box-shadow: 0 4px 0 rgba(42, 35, 32, 0.18);
  animation: chipHop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.navpaper__tab {
  position: relative;
  z-index: 1;
  flex: 0 0 72px;
  text-align: center;
  color: #2a2320;
  font-weight: 700;
  font-size: 13px;
  line-height: 1.6;
  font-family: inherit;
  white-space: nowrap;
}

@keyframes chipHop {
  0% {
    transform: translateX(0) translateY(0);
  }
  12% {
    transform: translateX(0) translateY(-5px);
  }
  25% {
    transform: translateX(var(--step)) translateY(0);
  }
  37% {
    transform: translateX(var(--step)) translateY(-5px);
  }
  50% {
    transform: translateX(calc(var(--step) * 2)) translateY(0);
  }
  62% {
    transform: translateX(calc(var(--step) * 2)) translateY(-5px);
  }
  75% {
    transform: translateX(var(--step)) translateY(0);
  }
  87% {
    transform: translateX(var(--step)) translateY(-5px);
  }
  100% {
    transform: translateX(0) translateY(0);
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .navpaper {
    width: 244px;
    gap: 8px;
    padding: 8px 12px;
  }
  .navpaper__brand {
    font-size: 12px;
  }
  .navpaper__tabs {
    --step: 56px;
  }
  .navpaper__chip {
    width: 52px;
  }
  .navpaper__tab {
    flex: 0 0 52px;
    font-size: 11px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .navpaper__chip {
    animation: none !important;
    transform: none;
  }
}