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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.wrap {
  position: relative;
  width: 240px;
  height: 150px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.backdrop {
  position: absolute;
  inset: 0;
  border-radius: 16px;
  background: radial-gradient(circle at 20% 30%, rgba(255, 158, 187, 0.9), transparent 55%), radial-gradient(circle at 80% 70%, rgba(110, 200, 255, 0.9), transparent 55%), radial-gradient(circle at 50% 50%, rgba(185, 160, 255, 0.85), transparent 60%);
}

.openBtn {
  position: relative;
  z-index: 2;
  appearance: none;
  border: none;
  border-radius: 999px;
  background: #17141a;
  color: #fff7e6;
  padding: 4px 16px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 140ms ease-out;
}
.openBtn:hover {
  transform: translateY(-1px);
}
.openBtn:active {
  transform: scale(0.95);
}
.openBtn:focus-visible {
  outline: 2px solid #5b8cf8;
  outline-offset: 2px;
}

.card {
  position: relative;
  z-index: 2;
  width: 160px;
  padding: 12px 16px;
  border-radius: 16px;
  opacity: 0;
  transform: scale(0.86);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), opacity 220ms ease-out;
  background: rgba(23, 20, 26, var(--fallback-alpha, 0.6));
}

@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
  .wrap:not(.force-fallback) .card {
    background: rgba(23, 20, 26, 0.28);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }
}
.card.is-open {
  opacity: 1;
  transform: scale(1);
}

.cardText {
  margin: 0;
  color: #fff7e6;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
}

.foot {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
}

.modeLabel {
  color: #17141a;
  font-size: 10px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.82);
  padding: 4px 8px;
  border-radius: 4px;
}

.simToggle {
  appearance: none;
  border: none;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.82);
  color: #fff7e6;
  padding: 4px 12px;
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 140ms ease-out;
}
.simToggle:active {
  transform: scale(0.96);
}
.simToggle[aria-pressed=true] {
  background: #c93000;
}
.simToggle:focus-visible {
  outline: 2px solid #5b8cf8;
  outline-offset: 2px;
}

@media (max-width: 340px) {
  .wrap {
    width: 200px;
    height: 130px;
  }
  .card {
    width: 140px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .card {
    transition: none;
  }
  .openBtn, .simToggle {
    transition: none;
  }
}