/* LED ランタン — led-lantern.css
   @property は HTML 内 <style> だとエディタ表示を壊すため外部化 */
@property --uc-lantern-glow {
  syntax: "<color>";
  inherits: true;
  initial-value: #9aa3a8;
}

.uc-lantern-stage,
.uc-lantern-stage *,
.uc-lantern-stage *::before,
.uc-lantern-stage *::after {
  box-sizing: border-box;
}

.uc-lantern-stage {
  --uc-lantern-scale: max(
    0.38,
    min(
      1.25,
      (100vw - 32px) / 350px,
      (100dvh - 32px) / 598px
    )
  );
  position: relative;
  display: grid;
  place-items: center;
  width: 350px;
  height: 598px;
  padding: 0;
  overflow: visible;
  transform: scale(var(--uc-lantern-scale));
  transform-origin: center;
}

.uc-lantern-stage::after {
  content: "";
  position: absolute;
  z-index: 0;
  left: 50%;
  bottom: 0;
  width: 310px;
  height: 42px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(0, 0, 0, 0.38), transparent 70%);
  filter: blur(8px);
  pointer-events: none;
}

/* LP全体を照らす吊り下げ表示 */
.lantern-overlay .lantern-overlay__stage {
  --uc-lantern-scale: 0.52;
  position: absolute;
  top: clamp(3.5rem, 8vh, 5.5rem);
  left: 50%;
  transform: translate3d(-50%, -118%, 0) scale(var(--uc-lantern-scale));
  transform-origin: top center;
  transition: transform 0.82s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

html[data-lantern-mode="night"] .lantern-overlay__stage,
html:has(#lanternModeToggle:checked) .lantern-overlay__stage {
  transform: translate3d(-50%, 0, 0) scale(var(--uc-lantern-scale));
  animation: uc-lantern-drop 1.15s cubic-bezier(0.2, 0.72, 0.22, 1) both;
}

@keyframes uc-lantern-drop {
  0% {
    transform: translate3d(-50%, -118%, 0) scale(var(--uc-lantern-scale));
  }
  100% {
    transform: translate3d(-50%, 0, 0) scale(var(--uc-lantern-scale));
  }
}

html:has(#lanternModeToggle:checked) .lantern-overlay.is-closing .lantern-overlay__stage {
  animation: uc-lantern-lift 1.45s cubic-bezier(0.4, 0, 0.2, 1) both;
}

@keyframes uc-lantern-lift {
  0% {
    transform: translate3d(-50%, 0, 0) scale(var(--uc-lantern-scale));
  }
  100% {
    transform: translate3d(-50%, -118%, 0) scale(var(--uc-lantern-scale));
  }
}

.lantern-overlay__pendulum {
  position: relative;
  display: grid;
  place-items: center;
  width: 350px;
  height: 598px;
  transform: rotate(0deg);
  transform-origin: 50% -190px;
  backface-visibility: hidden;
  will-change: transform;
}

html[data-lantern-mode="night"] .lantern-overlay__pendulum,
html:has(#lanternModeToggle:checked) .lantern-overlay__pendulum {
  animation: uc-lantern-pendulum-swing 2.15s cubic-bezier(0.37, 0, 0.63, 1);
}

@keyframes uc-lantern-pendulum-swing {
  0% { transform: rotate(-10deg); }
  24% { transform: rotate(8deg); }
  46% { transform: rotate(-5.5deg); }
  65% { transform: rotate(3.5deg); }
  80% { transform: rotate(-2deg); }
  91% { transform: rotate(0.8deg); }
  100% { transform: rotate(0deg); }
}

.lantern-overlay .lantern-overlay__pendulum::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: -190px;
  left: 50%;
  width: 4px;
  height: 198px;
  transform: translateX(-50%);
  border-inline: 1px solid rgba(236, 232, 223, 0.15);
  background: linear-gradient(90deg, #080b0e, #303840 52%, #080b0e);
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.72);
}

.lantern-overlay .lantern-overlay__stage::after {
  display: none;
}

.lantern-overlay .uc-lantern {
  pointer-events: auto;
  cursor: pointer;
  outline: none;
}

.lantern-overlay .uc-lantern:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--uc-lantern-glow) 72%, white);
  outline-offset: 12px;
}

.uc-lantern {
  --uc-lantern-glow: #9aa3a8;
  position: relative;
  z-index: 1;
  width: 250px;
  height: 598px;
  filter: drop-shadow(0 18px 18px rgba(0, 0, 0, 0.28));
  animation: uc-lantern-chroma 14s ease-in-out infinite;
}

.uc-lantern__top-knob {
  position: absolute;
  z-index: 5;
  top: 0;
  left: 50%;
  width: 178px;
  height: 56px;
  transform: translateX(-50%);
  border-radius: 26px 26px 13px 13px;
  background: #151b21;
  box-shadow:
    inset 0 2px 2px rgba(255, 255, 255, 0.045),
    inset 0 -3px 5px rgba(0, 0, 0, 0.32);
}

.uc-lantern__top-knob::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 50%;
  width: 96px;
  height: 13px;
  transform: translateX(-50%);
  border-radius: 0 0 50% 50%;
  background: #090d11;
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.035);
}

.uc-lantern__top-cap {
  position: absolute;
  z-index: 6;
  top: 52px;
  left: 50%;
  width: 282px;
  height: 44px;
  transform: translateX(-50%);
  border-radius: 18px 18px 12px 12px;
  background: #151b20;
  box-shadow:
    inset 0 2px 2px rgba(255, 255, 255, 0.04),
    0 6px 10px rgba(0, 0, 0, 0.22);
}

.uc-lantern__light-body {
  position: absolute;
  z-index: 2;
  top: 88px;
  left: 50%;
  width: 250px;
  height: 468px;
  transform: translateX(-50%);
  overflow: hidden;
  border-left: 4px solid rgba(20, 28, 35, 0.55);
  border-right: 4px solid rgba(20, 28, 35, 0.55);
  background: linear-gradient(
    90deg,
    rgba(20, 28, 34, 0.44) 0%,
    color-mix(in srgb, var(--uc-lantern-glow) 58%, white) 14%,
    color-mix(in srgb, var(--uc-lantern-glow) 32%, white) 50%,
    color-mix(in srgb, var(--uc-lantern-glow) 55%, white) 84%,
    rgba(20, 28, 34, 0.44) 100%
  );
  box-shadow:
    inset 0 0 18px color-mix(in srgb, var(--uc-lantern-glow) 42%, transparent),
    inset 16px 0 20px rgba(0, 0, 0, 0.16),
    inset -16px 0 20px rgba(0, 0, 0, 0.16);
  animation: uc-lantern-flicker 4.6s ease-in-out infinite;
}

.uc-lantern__mark {
  position: absolute;
  z-index: 1;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.uc-lantern__mark::before {
  content: "";
  position: absolute;
  z-index: 0;
  width: 78%;
  height: 62%;
  border-radius: 50%;
  background: radial-gradient(
    ellipse at 50% 48%,
    color-mix(in srgb, var(--uc-lantern-glow) 38%, white) 0%,
    color-mix(in srgb, var(--uc-lantern-glow) 32%, transparent) 42%,
    transparent 72%
  );
  filter: blur(22px);
}

.uc-lantern__logo {
  position: relative;
  z-index: 1;
  width: 54%;
  height: auto;
  transform: translateY(-6%) scale(1.44);
  opacity: 0.62;
  mix-blend-mode: multiply;
  filter:
    brightness(1.08)
    contrast(0.8)
    blur(0.35px)
    drop-shadow(0 0 14px color-mix(in srgb, var(--uc-lantern-glow) 45%, transparent))
    drop-shadow(0 0 32px color-mix(in srgb, var(--uc-lantern-glow) 25%, transparent));
  mask-image: radial-gradient(
    ellipse 82% 72% at 50% 48%,
    #000 38%,
    rgba(0, 0, 0, 0.7) 62%,
    rgba(0, 0, 0, 0.28) 82%,
    transparent 100%
  );
  -webkit-mask-image: radial-gradient(
    ellipse 82% 72% at 50% 48%,
    #000 38%,
    rgba(0, 0, 0, 0.7) 62%,
    rgba(0, 0, 0, 0.28) 82%,
    transparent 100%
  );
  user-select: none;
}

.uc-lantern__mark::after {
  content: "";
  position: absolute;
  z-index: 2;
  inset: 6% 8%;
  background:
    radial-gradient(
      ellipse at 50% 42%,
      color-mix(in srgb, var(--uc-lantern-glow) 28%, white) 0%,
      color-mix(in srgb, var(--uc-lantern-glow) 24%, transparent) 36%,
      transparent 70%
    ),
    linear-gradient(
      90deg,
      transparent 6%,
      color-mix(in srgb, var(--uc-lantern-glow) 22%, white) 50%,
      transparent 94%
    );
  mix-blend-mode: soft-light;
  filter: blur(11px);
}

.uc-lantern__light-body::before {
  content: "";
  position: absolute;
  z-index: 3;
  inset: 0;
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0 11px,
      rgba(255, 255, 255, 0.04) 11px 12px,
      transparent 12px 24px
    ),
    linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.1),
      transparent 28%,
      rgba(255, 255, 255, 0.04) 68%,
      rgba(0, 0, 0, 0.1)
    );
  opacity: 0.85;
  pointer-events: none;
}

.uc-lantern__light-body::after {
  content: "";
  position: absolute;
  z-index: 3;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 46%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
  filter: blur(14px);
  pointer-events: none;
}

.uc-lantern__bottom-ring {
  position: absolute;
  z-index: 7;
  left: 50%;
  bottom: 42px;
  width: 282px;
  height: 48px;
  transform: translateX(-50%);
  border-radius: 10px 10px 20px 20px;
  background: #151b20;
  box-shadow:
    inset 0 2px 2px rgba(255, 255, 255, 0.035),
    0 -4px 8px rgba(0, 0, 0, 0.2);
}

.uc-lantern__bottom-base {
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: 0;
  width: 182px;
  height: 52px;
  transform: translateX(-50%);
  border-radius: 0 0 24px 24px;
  background: #13191e;
  box-shadow:
    inset 0 -5px 8px rgba(0, 0, 0, 0.34),
    inset 0 2px 2px rgba(255, 255, 255, 0.03);
}

.uc-lantern__bottom-base::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 6px;
  width: 36px;
  height: 16px;
  transform: translateX(-50%);
  clip-path: polygon(0 100%, 50% 0, 100% 100%);
  background: #070a0d;
  opacity: 0.9;
}

.uc-lantern__glow {
  position: absolute;
  z-index: 1;
  top: 90px;
  left: 50%;
  width: 350px;
  height: 413px;
  transform: translateX(-50%);
  overflow: hidden;
  pointer-events: none;
  animation: uc-lantern-glow-flicker 4.6s ease-in-out infinite;
}

.uc-lantern__glow::before {
  content: "";
  position: absolute;
  inset: 8px 0 0;
  border-radius: 46%;
  background: radial-gradient(
    ellipse at 50% 44%,
    color-mix(in srgb, var(--uc-lantern-glow) 28%, transparent),
    transparent 70%
  );
  filter: blur(16px);
}

@keyframes uc-lantern-chroma {
  0%,
  100% {
    --uc-lantern-glow: #9aa3a8;
  }
  25% {
    --uc-lantern-glow: #f0c93b;
  }
  50% {
    --uc-lantern-glow: var(--color-tiffany);
  }
  75% {
    --uc-lantern-glow: var(--color-purple);
  }
}

@keyframes uc-lantern-flicker {
  0%, 100% { filter: brightness(1); }
  3% { filter: brightness(0.9); }
  5% { filter: brightness(1.06); }
  7% { filter: brightness(0.84); }
  10% { filter: brightness(1.03); }
  22% { filter: brightness(0.97); }
  24% { filter: brightness(1.08); }
  26% { filter: brightness(0.88); }
  29% { filter: brightness(1.02); }
  54% { filter: brightness(1); }
  61% { filter: brightness(0.93); }
  63% { filter: brightness(1.05); }
  65% { filter: brightness(0.86); }
  68% { filter: brightness(1.01); }
  82% { filter: brightness(0.96); }
  84% { filter: brightness(1.04); }
}

@keyframes uc-lantern-glow-flicker {
  0%, 100% { opacity: 1; }
  3% { opacity: 0.55; }
  5% { opacity: 1; }
  7% { opacity: 0.35; }
  10% { opacity: 0.95; }
  22% { opacity: 0.75; }
  24% { opacity: 1; }
  26% { opacity: 0.42; }
  29% { opacity: 0.9; }
  54% { opacity: 1; }
  61% { opacity: 0.6; }
  63% { opacity: 1; }
  65% { opacity: 0.38; }
  68% { opacity: 0.92; }
  82% { opacity: 0.7; }
  84% { opacity: 1; }
}

@media (max-width: 639px) {
  .lantern-overlay .lantern-overlay__stage {
    --uc-lantern-scale: 0.21;
    top: 3.5rem;
  }

  .lantern-overlay .uc-lantern {
    --uc-lantern-glow: #f6c56f;
    filter: drop-shadow(0 10px 10px rgba(0, 0, 0, 0.24));
    animation: none;
  }

  .lantern-overlay .uc-lantern__light-body,
  .lantern-overlay .uc-lantern__glow {
    animation: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lantern-overlay .lantern-overlay__stage {
    transition: none;
  }

  html:has(#lanternModeToggle:checked) .lantern-overlay__stage {
    animation: none;
  }

  html:has(#lanternModeToggle:checked) .lantern-overlay.is-closing .lantern-overlay__stage {
    animation: none;
  }

  html:has(#lanternModeToggle:checked) .lantern-overlay__pendulum {
    animation: none;
  }

  .uc-lantern {
    --uc-lantern-glow: var(--color-tiffany);
    animation: none;
  }

  .uc-lantern__light-body,
  .uc-lantern__glow {
    animation: none;
  }
}