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);
}

.footer-c {
  position: relative;
  box-sizing: border-box;
  width: clamp(260px, 88vw, 400px);
  border-radius: 16px;
  padding: 24px;
  background: #17141a;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.footer-c::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, #2f6df6, #ffd23f, #ff4d1f, #fff7e6, #2f6df6);
  background-size: 260% 100%;
  animation: hairlineShift 2s linear infinite;
}

.footer-c__col {
  position: relative;
  z-index: 1;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-c__label {
  margin: 0;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 700;
  font-size: clamp(9.5px, 2.2vw, 10.5px);
  line-height: 1;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-c__link {
  margin: 0;
  color: #ffffff;
  font-weight: 600;
  font-size: clamp(11px, 2.6vw, 12px);
  line-height: 1.4;
  font-family: inherit;
}

@keyframes hairlineShift {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 260% 50%;
  }
}
@media (prefers-reduced-motion: reduce) {
  .footer-c::before {
    animation: none;
  }
}