/* mosaic-reset: uiverse 컴포넌트 공통 전제 (box-sizing + 기본 sans-serif) */
*, *::before, *::after { box-sizing: border-box; }
:where(body) { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }

/* 단독 동작용 무대 — 밝은 배경 + 중앙 정렬 */
html, body { margin: 0; height: 100%; }
body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #f0f0f0;
}

/* ---- 컴포넌트 본체 (uiverse: plastic-moth-91) ---- */
.heart-container {
  --heart-color: rgb(255, 91, 137);
  position: relative;
  width: 50px;
  height: 50px;
  transition: .3s;
}

.heart-container .checkbox {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  z-index: 20;
  cursor: pointer;
}

.heart-container .svg-container {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.heart-container .svg-outline,
.heart-container .svg-filled {
  fill: var(--heart-color);
  position: absolute;
}

.heart-container .svg-filled {
  animation: keyframes-svg-filled 1s;
  display: none;
}

.heart-container .svg-celebrate {
  position: absolute;
  animation: keyframes-svg-celebrate .5s;
  animation-fill-mode: forwards;
  display: none;
  stroke: var(--heart-color);
  fill: var(--heart-color);
  stroke-width: 2px;
}

.heart-container .checkbox:checked~.svg-container .svg-filled {
  display: block;
}

.heart-container .checkbox:checked~.svg-container .svg-celebrate {
  display: block;
}

@keyframes keyframes-svg-filled {
  0% { transform: scale(0); }
  25% { transform: scale(1.2); }
  50% { transform: scale(1); filter: brightness(1.5); }
}

@keyframes keyframes-svg-celebrate {
  0% { transform: scale(0); }
  50% { opacity: 1; filter: brightness(1.5); }
  100% { transform: scale(1.4); opacity: 0; display: none; }
}