/* =========================================================
   Cover - Shell and background layers
   ========================================================= */

#cover {
  position: fixed;
  inset: 0;

  width: auto;
  height: auto;
  min-height: 0;

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 20px;
  padding: calc(env(safe-area-inset-top, 0px) + 16px) 16px calc(env(safe-area-inset-bottom, 0px) + 76px);
  overscroll-behavior: none;
  touch-action: pan-y;
  opacity: 0;
  overflow: hidden;
  background: #06080f;
  transition: opacity 1.5s ease-in-out;
  z-index: 100;
  isolation: isolate;

  --cover-overscan: 36px;
  --cover-bg-x: 0px;
  --cover-bg-y: 0px;
  --cover-fg-x: 0px;
  --cover-fg-y: 0px;
  --cover-avatar-x: var(--cover-fg-x);
  --cover-avatar-y: var(--cover-fg-y);
  --cover-name-x: var(--cover-fg-x);
  --cover-name-y: var(--cover-fg-y);
  --cover-slogan-x: var(--cover-fg-x);
  --cover-slogan-y: var(--cover-fg-y);
  --cover-cue-x: 0px;
  --cover-cue-y: 0px;
  --cover-light-x: 50%;
  --cover-light-y: 44%;
}

/* =========================================================
   Cover - Cinematic visual toggle
   Star-eye 3.0: arc-dust closing eye
   ========================================================= */

#cover-visual-toggle {
  position: absolute;
  top: calc(env(safe-area-inset-top, 0px) + 17px);
  right: calc(env(safe-area-inset-right, 0px) + 18px);
  width: 74px;
  height: 62px;
  z-index: 82;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 0;
  border: none;
  outline: none;
  background: transparent;
  color: rgba(247, 250, 255, 0.88);
  cursor: pointer;

  -webkit-tap-highlight-color: transparent;
  user-select: none;

  opacity: 0.75;
  visibility: visible;
  transform: translateY(0) scale(1);

  filter:
    drop-shadow(0 1px 3px rgba(0,0,0,0.56))
    drop-shadow(0 0 7px rgba(255,255,255,0.13))
    drop-shadow(0 0 15px rgba(140,190,255,0.08));

  transition:
    opacity 0.36s ease,
    transform 0.36s cubic-bezier(0.16, 1, 0.3, 1),
    color 0.36s ease,
    filter 0.36s ease;
}

#cover-visual-toggle::before {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  top: 8px;
  bottom: 8px;
  pointer-events: none;
  opacity: 0.38;
  background:
    radial-gradient(circle at 50% 50%,
      rgba(225,238,255,0.18) 0%,
      rgba(170,205,255,0.06) 38%,
      rgba(0,0,0,0) 72%);
  filter: blur(9px);
  transform: scale(0.92);
  transition:
    opacity 0.36s ease,
    transform 0.36s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.36s ease;
}

#cover-visual-toggle::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  top: 6px;
  bottom: 6px;
  pointer-events: none;
  opacity: 0;
  background:
    radial-gradient(circle at 50% 50%,
      rgba(255,255,255,0.23) 0%,
      rgba(210,230,255,0.08) 28%,
      rgba(0,0,0,0) 66%);
  filter: blur(12px);
  transform: scale(0.92);
  transition:
    opacity 0.36s ease,
    transform 0.36s cubic-bezier(0.16, 1, 0.3, 1);
}

#cover-visual-toggle:hover {
  opacity: 1;
  transform: translateY(-1px) scale(1.035);
  color: rgba(255,255,255,0.98);
  filter:
    drop-shadow(0 1px 3px rgba(0,0,0,0.56))
    drop-shadow(0 0 9px rgba(235,245,255,0.30))
    drop-shadow(0 0 19px rgba(145,200,255,0.22));
}

#cover-visual-toggle:hover::before {
  opacity: 0.76;
  transform: scale(1.08);
  filter: blur(10px);
}

#cover-visual-toggle:hover::after {
  opacity: 1;
  transform: scale(1.10);
}

#cover-visual-toggle:active {
  transform: translateY(0) scale(0.975);
  opacity: 0.9;
}

#cover-visual-toggle:focus-visible {
  filter:
    drop-shadow(0 0 10px rgba(255,255,255,0.30))
    drop-shadow(0 0 22px rgba(145,200,255,0.20))
    drop-shadow(0 1px 3px rgba(0,0,0,0.56));
}

#cover-visual-toggle svg {
  width: 60px;
  height: 50px;
  display: block;
  overflow: visible;
}

#cover-visual-toggle path,
#cover-visual-toggle circle {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
  transform-box: fill-box;
  transform-origin: center;
  transition:
    opacity 0.34s ease,
    transform 0.34s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.34s ease;
}

#cover-visual-toggle .star-eye-arc {
  stroke-width: 2.12;
}

#cover-visual-toggle .arc-top {
  opacity: 0.98;
}

#cover-visual-toggle .arc-bottom {
  opacity: 0.88;
}

#cover-visual-toggle .star-eye-inner {
  stroke-width: 1.02;
  opacity: 0.42;
}

#cover-visual-toggle .star-eye-tail,
#cover-visual-toggle .star-eye-closing-tail {
  stroke-width: 1.18;
  stroke-dasharray: 1.4 5.2;
  stroke-dashoffset: 0;
  opacity: 0.42;
  filter: drop-shadow(0 0 2px rgba(230,242,255,0.18));
}

#cover-visual-toggle .tail-left-top,
#cover-visual-toggle .tail-right-top {
  opacity: 0.52;
}

#cover-visual-toggle .tail-left-bottom,
#cover-visual-toggle .tail-right-bottom {
  opacity: 0.34;
}

#cover-visual-toggle .star-tail-spark {
  fill: currentColor;
  stroke: none;
  opacity: 0.70;
  transform-box: fill-box;
  transform-origin: center;
}

#cover-visual-toggle .star-eye-upper-lash {
  stroke-width: 1.12;
  opacity: 0.34;
}

#cover-visual-toggle .star-eye-spark,
#cover-visual-toggle .star-eye-fading-star {
  fill: currentColor;
  stroke: currentColor;
  stroke-width: 0.66;
  opacity: 0.96;
}

#cover-visual-toggle .star-eye-core,
#cover-visual-toggle .star-eye-fading-core {
  fill: currentColor;
  stroke: none;
  opacity: 0.98;
}

#cover-visual-toggle .star-eye-lid,
#cover-visual-toggle .star-eye-lash {
  stroke-width: 2.06;
}

.cover-visual-icon {
  position: absolute;
  inset: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    opacity 0.24s ease,
    transform 0.38s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.38s ease;
}

.cover-visual-eye-open {
  opacity: 1;
  transform: scale(1);
  filter: blur(0);
}

.cover-visual-eye-open svg {
  animation: cover-star-eye-breathe 5.2s ease-in-out infinite;
}

.cover-visual-eye-open .star-eye-spark {
  animation: cover-star-eye-sparkle 3.6s ease-in-out infinite;
}

.cover-visual-eye-open .star-eye-core {
  animation: cover-star-eye-core 3.6s ease-in-out infinite;
}

.cover-visual-eye-open .tail-left-top,
.cover-visual-eye-open .tail-right-top {
  animation: cover-star-tail-flow-main 4.8s ease-in-out infinite;
}

.cover-visual-eye-open .tail-left-bottom,
.cover-visual-eye-open .tail-right-bottom {
  animation: cover-star-tail-flow-sub 5.6s ease-in-out infinite 0.36s;
}

.cover-visual-eye-open .star-tail-spark {
  animation: cover-star-tail-spark 4.4s ease-in-out infinite;
}

.cover-visual-eye-open .s2,
.cover-visual-eye-open .s6 {
  animation-delay: 0.25s;
}

.cover-visual-eye-open .s3,
.cover-visual-eye-open .s7 {
  animation-delay: 0.5s;
}

.cover-visual-eye-open .s4,
.cover-visual-eye-open .s8 {
  animation-delay: 0.75s;
}

.cover-visual-eye-open .star-eye-upper-lash {
  animation: cover-star-upper-lash 5.4s ease-in-out infinite;
}

.cover-visual-eye-open .l2,
.cover-visual-eye-open .l4 {
  animation-delay: 0.18s;
}

.cover-visual-eye-open .l3 {
  animation-delay: 0.34s;
}

#cover-visual-toggle:hover .arc-top {
  transform: translateY(-0.8px);
}

#cover-visual-toggle:hover .arc-bottom {
  transform: translateY(0.8px);
}

#cover-visual-toggle:hover .tail-left-top {
  transform: translate(-1.3px, -0.7px);
  opacity: 0.82;
}

#cover-visual-toggle:hover .tail-left-bottom {
  transform: translate(-1.1px, 0.7px);
  opacity: 0.64;
}

#cover-visual-toggle:hover .tail-right-top {
  transform: translate(1.3px, -0.7px);
  opacity: 0.82;
}

#cover-visual-toggle:hover .tail-right-bottom {
  transform: translate(1.1px, 0.7px);
  opacity: 0.64;
}

#cover-visual-toggle:hover .star-tail-spark {
  opacity: 1;
  transform: scale(1.22);
  filter: drop-shadow(0 0 4px rgba(245,250,255,0.42));
}

#cover-visual-toggle:hover .star-eye-upper-lash {
  opacity: 0.68;
  transform: translateY(-0.7px);
  filter: drop-shadow(0 0 3px rgba(245,250,255,0.22));
}

#cover-visual-toggle:hover .star-eye-spark,
#cover-visual-toggle:hover .star-eye-core {
  opacity: 1;
  filter: drop-shadow(0 0 5px rgba(245,250,255,0.40));
}

.cover-visual-eye-closed {
  opacity: 0;
  transform: scale(0.92);
  filter: blur(2px);
}

#cover-visual-toggle.is-closed .cover-visual-eye-open {
  opacity: 0;
  transform: scale(1.04);
  filter: blur(3px);
}

#cover-visual-toggle.is-closed .cover-visual-eye-closed {
  opacity: 1;
  transform: scale(1);
  filter: blur(0);
}

#cover-visual-toggle.is-closed .cover-visual-eye-closed svg {
  animation: cover-star-eye-closed-settle 0.62s cubic-bezier(0.16, 1, 0.3, 1);
}

#cover-visual-toggle.is-closed .star-eye-lid {
  stroke-dasharray: 62;
  stroke-dashoffset: 62;
  animation: cover-star-eye-lid-draw 0.52s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

#cover-visual-toggle.is-closed .star-eye-lash {
  opacity: 0;
  transform: translateY(-1px) scale(0.92);
  animation: cover-star-eye-lash-appear 0.42s ease forwards;
}

#cover-visual-toggle.is-closed .l1 {
  animation-delay: 0.10s;
}

#cover-visual-toggle.is-closed .l2 {
  animation-delay: 0.16s;
}

#cover-visual-toggle.is-closed .l3 {
  animation-delay: 0.22s;
}

#cover-visual-toggle.is-closed .star-eye-closing-tail {
  stroke-dasharray: 1.2 4.8;
  animation: cover-star-tail-gather 0.58s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

#cover-visual-toggle.is-closed .star-eye-fading-star {
  animation: cover-star-fading-star 0.62s ease forwards;
}

#cover-visual-toggle.is-closed .star-eye-fading-core {
  animation: cover-star-fading-core 0.62s ease forwards;
}

#cover-visual-toggle.is-closed .star-tail-spark {
  animation: cover-star-spark-gather 0.58s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes cover-star-eye-breathe {
  0%, 100% {
    transform: scale(1) translateY(0);
    opacity: 0.98;
  }
  50% {
    transform: scale(1.018) translateY(-0.35px);
    opacity: 1;
  }
}

@keyframes cover-star-eye-sparkle {
  0%, 100% {
    transform: scale(1) rotate(0deg);
    opacity: 0.88;
    filter: drop-shadow(0 0 0 rgba(255,255,255,0));
  }
  42% {
    transform: scale(1.10) rotate(8deg);
    opacity: 1;
    filter: drop-shadow(0 0 4px rgba(235,245,255,0.30));
  }
  70% {
    transform: scale(0.98) rotate(-4deg);
    opacity: 0.94;
  }
}

@keyframes cover-star-eye-core {
  0%, 100% {
    transform: scale(1);
    opacity: 0.72;
  }
  48% {
    transform: scale(1.22);
    opacity: 1;
  }
}

@keyframes cover-star-tail-flow-main {
  0%, 100% {
    stroke-dashoffset: 0;
    opacity: 0.40;
  }
  50% {
    stroke-dashoffset: -7;
    opacity: 0.78;
  }
}

@keyframes cover-star-tail-flow-sub {
  0%, 100% {
    stroke-dashoffset: 0;
    opacity: 0.25;
  }
  50% {
    stroke-dashoffset: 6;
    opacity: 0.54;
  }
}

@keyframes cover-star-tail-spark {
  0%, 100% {
    opacity: 0.42;
    transform: scale(0.92);
  }
  45% {
    opacity: 0.95;
    transform: scale(1.18);
  }
}

@keyframes cover-star-upper-lash {
  0%, 100% {
    opacity: 0.26;
    transform: translateY(0);
  }
  48% {
    opacity: 0.58;
    transform: translateY(-0.4px);
  }
}

@keyframes cover-star-eye-closed-settle {
  0% {
    transform: scale(0.94) translateY(-1px);
    opacity: 0.68;
    filter: blur(1.2px);
  }
  100% {
    transform: scale(1) translateY(0);
    opacity: 1;
    filter: blur(0);
  }
}

@keyframes cover-star-eye-lid-draw {
  0% {
    stroke-dashoffset: 62;
    opacity: 0.30;
  }
  100% {
    stroke-dashoffset: 0;
    opacity: 0.98;
  }
}

@keyframes cover-star-eye-lash-appear {
  0% {
    opacity: 0;
    transform: translateY(-1px) scale(0.88);
  }
  100% {
    opacity: 0.72;
    transform: translateY(0) scale(1);
  }
}

@keyframes cover-star-tail-gather {
  0% {
    opacity: 0.72;
    stroke-dashoffset: 0;
    transform: translateX(0);
  }
  100% {
    opacity: 0.36;
    stroke-dashoffset: -9;
    transform: translateX(0);
  }
}

@keyframes cover-star-fading-star {
  0% {
    opacity: 1;
    transform: scale(1.18) rotate(10deg);
    filter: drop-shadow(0 0 6px rgba(245,250,255,0.40));
  }
  55% {
    opacity: 0.86;
    transform: scale(0.96) rotate(-4deg);
  }
  100% {
    opacity: 0.32;
    transform: scale(0.72) rotate(0deg);
    filter: drop-shadow(0 0 0 rgba(245,250,255,0));
  }
}

@keyframes cover-star-fading-core {
  0% {
    opacity: 1;
    transform: scale(1.5);
  }
  100% {
    opacity: 0.28;
    transform: scale(0.72);
  }
}

@keyframes cover-star-spark-gather {
  0% {
    opacity: 0.92;
    transform: scale(1.12);
  }
  100% {
    opacity: 0.30;
    transform: scale(0.76);
  }
}

/* =========================================================
   Cover - Cinematic clean view
   ========================================================= */

#cover.cover-visual-clean {
  cursor: default;
}

#cover.cover-visual-clean #avatar-frame {
  opacity: 0 !important;
  transform: translateY(0) scale(0.985) !important;
  filter:
    blur(8px)
    drop-shadow(0 0 0.8px rgba(255,255,255,0.45))
    drop-shadow(0 6px 18px rgba(0,0,0,0.12)) !important;
  pointer-events: none !important;
  transition:
    opacity 0.58s ease,
    transform 0.62s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.62s ease !important;
  transition-delay: 0.14s !important;
}

#cover.cover-visual-clean #name {
  opacity: 0 !important;
  transform: translateY(0) scale(0.992) !important;
  filter: blur(7px) brightness(0.9) !important;
  pointer-events: none !important;
  transition:
    opacity 0.50s ease,
    transform 0.56s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.56s ease,
    letter-spacing 0.56s ease !important;
  transition-delay: 0.08s !important;
}

#cover.cover-visual-clean #slogan {
  opacity: 0 !important;
  transform: translateY(0) scale(0.992) !important;
  filter: blur(8px) brightness(0.88) !important;
  pointer-events: none !important;
  transition:
    opacity 0.56s ease,
    transform 0.60s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.60s ease,
    letter-spacing 0.60s ease !important;
  transition-delay: 0.04s !important;
}

#cover.cover-visual-clean #cover-scroll {
  opacity: 0 !important;
  transform: translateX(-50%) translateY(0) scale(0.985) !important;
  filter: blur(6px) brightness(0.9) !important;
  pointer-events: none !important;
  transition:
    opacity 0.42s ease,
    transform 0.50s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.50s ease !important;
  transition-delay: 0s !important;
}

#cover.cover-visual-clean #cover-scroll.cover-hint-bounce,
#cover.cover-visual-clean .cover-hint-particle {
  animation: none !important;
  opacity: 0 !important;
}

#cover.cover-visual-clean #cover-visual-toggle {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
  transform: translateY(-2px) scale(0.96);
  transition:
    opacity 0.38s ease 0.18s,
    visibility 0s linear 0.58s,
    transform 0.44s cubic-bezier(0.16, 1, 0.3, 1) 0.12s !important;
}

#cover.cover-visual-clean::before,
#cover.cover-visual-clean::after,
#cover.cover-visual-clean .cover-bg-reveal::after {
  opacity: 0 !important;
  transition: opacity 0.52s ease !important;
}

/* =========================================================
   Cover - Fullscreen hint
   ========================================================= */

#cover-fullscreen-hint {
  position: absolute;
  left: 50%;
  top: calc(env(safe-area-inset-top, 0px) + 34px);
  z-index: 84;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;

  width: max-content;
  max-width: min(86vw, 620px);

  color: rgba(247, 250, 255, 0.78);

  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  pointer-events: none;

  transition:
    opacity 0.48s ease,
    visibility 0s linear 0.48s,
    transform 0.48s cubic-bezier(0.16, 1, 0.3, 1);
}

#cover-fullscreen-hint.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);

  transition:
    opacity 0.48s ease,
    visibility 0s linear 0s,
    transform 0.48s cubic-bezier(0.16, 1, 0.3, 1);
}

.cover-fullscreen-hint-main {
  font-size: 13px;
  line-height: 1.45;
  font-weight: 400;
  letter-spacing: 0.075em;
  text-align: center;
  color: rgba(247, 250, 255, 0.80);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.32);
  white-space: normal;
}

.cover-fullscreen-hint-shortcut {
  font-size: 11.5px;
  line-height: 1.55;
  font-weight: 400;
  letter-spacing: 0.055em;
  text-align: center;
  color: rgba(224, 234, 248, 0.58);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.28);
  white-space: normal;
}

#cover-fullscreen-hint:not(.has-shortcut) .cover-fullscreen-hint-shortcut {
  display: none;
}

.cover-fullscreen-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-width: 1.45em;
  padding: 0 4px;
  margin: 0 1px;

  font-family:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Monaco,
    Consolas,
    "Liberation Mono",
    monospace;

  font-size: 0.88em;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0.01em;

  color: rgba(255, 255, 255, 0.78);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 4px;

  box-shadow: none;
  vertical-align: 0.03em;
}

@media (max-width: 640px) {
  #cover-fullscreen-hint {
    top: calc(env(safe-area-inset-top, 0px) + 26px);
    max-width: min(88vw, 420px);
  }

  .cover-fullscreen-hint-main {
    font-size: 12px;
    letter-spacing: 0.055em;
  }

  .cover-fullscreen-hint-shortcut {
    font-size: 10.8px;
  }
}

/* =========================================================
   Cover - Background and video layers
   ========================================================= */

.cover-bg {
  position: absolute;
  inset: calc(-1 * var(--cover-overscan));
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  pointer-events: none;
  will-change: opacity, transform, filter, translate;
  translate: var(--cover-bg-x) var(--cover-bg-y);
  transform-origin: center center;
  backface-visibility: hidden;
}

.cover-bg-base {
  z-index: 0;
  opacity: 0.34;
  transform: scale(1.065);
  filter: blur(5px) brightness(0.72) saturate(0.92);
  transition:
    opacity 1.35s ease,
    transform 3.0s ease,
    filter 1.35s ease;
}

.cover-bg-reveal {
  z-index: 1;
  opacity: 0;
  transform: scale(1.12);
  filter: blur(7px) brightness(0.82) saturate(0.96);
  transition:
    opacity 1.45s ease,
    transform 6.2s cubic-bezier(0.16, 1, 0.3, 1),
    filter 1.65s ease;
}

.cover-bg-reveal::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background:
    radial-gradient(
      circle at var(--cover-light-x) var(--cover-light-y),
      rgba(255,255,255,0.105) 0%,
      rgba(210,225,255,0.055) 24%,
      rgba(0,0,0,0.0) 52%
    );
  mix-blend-mode: screen;
  transition: opacity 1.15s ease;
}

#cover.background-ready:not(.leaving) .cover-bg-reveal {
  opacity: 1;
  transform: scale(1);
  filter: none;
}

#cover.background-ready:not(.leaving) .cover-bg-reveal::after {
  opacity: 0.72;
}

#cover.background-ready:not(.leaving) .cover-bg-base {
  opacity: 0;
  transform: scale(1);
  filter: none;
}

.cover-video-layer {
  position: absolute;
  inset: 0;
  z-index: 2;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
  contain: paint;
  will-change: opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
  transition: opacity 0.9s ease;
}

.cover-video-layer::after {
  content: none;
  display: none;
}

.cover-video-media {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  pointer-events: none;
  transform: translateZ(0);
  backface-visibility: hidden;
}

#cover.video-ready:not(.leaving) .cover-video-layer {
  opacity: 1;
}

#cover.video-ready:not(.leaving) .cover-bg-base,
#cover.video-ready:not(.leaving) .cover-bg-reveal {
  opacity: 0;
  transform: scale(1);
  filter: none;
}

#cover.video-ready:not(.leaving) .cover-bg-reveal::after {
  opacity: 0;
}

#cover::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  opacity: 1;
  background:
    radial-gradient(circle at center, rgba(0,0,0,0.08), rgba(0,0,0,0.30)),
    linear-gradient(180deg, rgba(0,0,0,0.14), rgba(0,0,0,0.30));
  transition: opacity 1.2s ease;
}

#cover.background-ready:not(.leaving)::before {
  opacity: 0;
}

#cover::after {
  content: "";
  position: absolute;
  inset: -2px 0;
  z-index: 70;
  pointer-events: none;
  opacity: 0;
  transform: translateY(18px);
  background:
    linear-gradient(
      180deg,
      rgba(5, 7, 12, 0.08) 0%,
      rgba(5, 7, 12, 0.70) 58%,
      rgba(5, 7, 12, 0.96) 100%
    );
  transition:
    opacity 1.05s ease,
    transform 1.05s cubic-bezier(0.16, 1, 0.3, 1);
}

#cover.leaving {
  pointer-events: none;
}

#cover.leaving::before {
  opacity: 1;
}

#cover.leaving::after {
  opacity: 1;
  transform: translateY(0);
}

#cover.leaving .cover-bg-base {
  opacity: 0.08;
  transform: scale(1.055);
  filter: blur(7px) brightness(0.48) saturate(1);
}

#cover.leaving .cover-bg-reveal {
  opacity: 1;
  transform: scale(1.065);
  filter: blur(2px) brightness(0.62) saturate(1.03);
}

#cover.leaving .cover-video-layer {
  opacity: 0.72;
}

#cover.visible {
  opacity: 1;
}

#cover.hidden {
  opacity: 0;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  #cover-fullscreen-hint,
  .cover-fullscreen-key,
  .cover-fullscreen-hint-main,
  .cover-fullscreen-hint-shortcut,
  #cover-visual-toggle,
  #cover-visual-toggle::before,
  #cover-visual-toggle::after,
  .cover-visual-icon,
  .cover-visual-eye-open svg,
  .cover-visual-eye-open .star-eye-spark,
  .cover-visual-eye-open .star-eye-core,
  .cover-visual-eye-open .star-eye-tail,
  .cover-visual-eye-open .star-tail-spark,
  .cover-visual-eye-open .star-eye-upper-lash,
  #cover-visual-toggle.is-closed .cover-visual-eye-closed svg,
  #cover-visual-toggle.is-closed .star-eye-lid,
  #cover-visual-toggle.is-closed .star-eye-lash,
  #cover-visual-toggle.is-closed .star-eye-closing-tail,
  #cover-visual-toggle.is-closed .star-eye-fading-star,
  #cover-visual-toggle.is-closed .star-eye-fading-core,
  #cover-visual-toggle.is-closed .star-tail-spark {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}