/* Wan-Coco Garden の仮画面（garden-preview.mjs が開く <dialog class="garden-preview">）。
   画像は縦横比を保ったまま画面に収め（切らない・拡大しすぎない）、余った所は同じ画像をぼかして敷く。
   開く時は、光の中からふわっと庭が現れる。看板のまわりだけ、やわらかい光と小さなきらめきが明滅する。
   位置は画像 941×1672 に対する割合（看板の中心 ≒ 49.7%, 56.5%） */
dialog.garden-preview {
  position: fixed; inset: 0; width: 100%; height: 100%; max-width: none; max-height: none;
  margin: 0; padding: 0; border: 0; border-radius: 0; overflow: hidden;
  background: #8fcf6a; color: inherit;
}
dialog.garden-preview::backdrop { background: #fffbe8; }
dialog.garden-preview::before {
  content: ''; position: absolute; inset: -40px;
  background: url('theme/garden/coming-soon.webp?v=1') center / cover no-repeat;
  filter: blur(18px) brightness(.9) saturate(1.05);
}
dialog.garden-preview[open] { display: grid; place-items: center; animation: garden-light .7s ease-out both; }
dialog.garden-preview[open] .garden-art { animation: garden-in 1.1s cubic-bezier(.2, .7, .2, 1) both; }
@keyframes garden-light { from { opacity: 0; } to { opacity: 1; } }
@keyframes garden-in { from { transform: scale(1.06); filter: brightness(1.6) saturate(.7); } to { transform: none; filter: none; } }
.garden-art {
  position: relative;
  width: min(100vw, calc(100vh * 941 / 1672));
  width: min(100vw, calc(100dvh * 941 / 1672));
  aspect-ratio: 941 / 1672; max-width: 100%;
}
.garden-art img { display: block; width: 100%; height: 100%; }
.garden-glow {
  position: absolute; left: 49.7%; top: 56.5%; width: 46%; aspect-ratio: 2 / 1; translate: -50% -50%;
  border-radius: 50%; pointer-events: none;
  background: radial-gradient(closest-side, rgba(255, 246, 196, .55), rgba(255, 246, 196, 0));
  mix-blend-mode: screen; animation: garden-breathe 2.8s ease-in-out 1.1s infinite both;
}
@keyframes garden-breathe { 0%, 100% { opacity: .15; } 50% { opacity: .85; } }
.garden-spark {
  position: absolute; width: 3.2%; aspect-ratio: 1; translate: -50% -50%; pointer-events: none; opacity: 0;
  background: radial-gradient(closest-side, #fff, rgba(255, 255, 255, 0)), conic-gradient(from 45deg, transparent 0 20%, #fff8d6 20% 30%, transparent 30% 45%, #fff8d6 45% 55%, transparent 55% 70%, #fff8d6 70% 80%, transparent 80%);
  border-radius: 50%; animation: garden-twinkle 2.8s ease-in-out infinite;
}
.garden-spark.s1 { left: 34%; top: 52.5%; animation-delay: 1.3s; }
.garden-spark.s2 { left: 65.5%; top: 54%; animation-delay: 2.2s; }
.garden-spark.s3 { left: 58%; top: 61.5%; animation-delay: 3.1s; }
@keyframes garden-twinkle { 0%, 100% { opacity: 0; scale: .4; } 45% { opacity: 1; scale: 1; } 70% { opacity: 0; scale: .6; } }
.garden-back {
  position: absolute; z-index: 1;
  top: max(12px, env(safe-area-inset-top)); right: max(12px, env(safe-area-inset-right));
  width: 44px; height: 44px; border-radius: 50%; padding: 0; cursor: pointer;
  font: 700 26px/1 system-ui, sans-serif; color: #5b4a2e;
  border: 2px solid #f3dcae; background: linear-gradient(#fffaf0, #f1dfbd);
  box-shadow: 0 3px 0 #b8925d, 0 6px 14px rgba(0, 0, 0, .25);
}
.garden-back:active { translate: 0 2px; box-shadow: 0 1px 0 #b8925d, 0 3px 8px rgba(0, 0, 0, .25); }
.garden-back:focus-visible { outline: 3px solid #fff; outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  dialog.garden-preview[open], dialog.garden-preview[open] .garden-art, .garden-glow, .garden-spark { animation: none; }
  .garden-glow { opacity: .4; }
}