.error-document-page .shell {
  display: grid;
  min-height: 100vh;
  min-height: 100dvh;
  place-items: center;
  padding-block: clamp(1.25rem, 5vw, 3.5rem);
}

.error-surface {
  width: min(100%, 42rem);
  align-content: start;
  gap: var(--space-5);
  min-width: 0;
  padding: clamp(1.35rem, 4vw, 2.25rem);
}

.error-surface-standalone {
  position: relative;
  width: min(100%, 68rem);
  overflow: hidden;
  border-color: color-mix(in srgb, var(--color-accent) 20%, var(--color-border));
  background:
    radial-gradient(circle at 85% 15%, rgb(75 141 255 / 13%), transparent 23rem),
    radial-gradient(circle at 8% 100%, rgb(118 92 255 / 11%), transparent 24rem),
    linear-gradient(145deg, rgb(255 255 255 / 3%), transparent 54%),
    var(--color-surface);
  box-shadow: 0 2rem 6rem rgb(0 0 0 / 30%);
}

.error-surface-header {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.error-surface-brand {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  font-size: var(--font-size-lg);
  font-weight: 850;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.error-surface-mark {
  display: grid;
  width: 2.45rem;
  height: 2.45rem;
  place-items: center;
  border-radius: var(--radius-control);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
  box-shadow:
    0 0.75rem 1.8rem rgb(83 76 255 / 24%),
    inset 0 0 0 1px rgb(255 255 255 / 16%);
  color: var(--color-on-accent);
  font-size: 1.05rem;
  font-weight: 900;
}

.error-surface-code {
  display: inline-flex;
  width: fit-content;
  min-height: 2.15rem;
  margin: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid color-mix(in srgb, var(--color-accent) 30%, var(--color-border));
  border-radius: var(--radius-pill);
  padding: 0.35rem 0.72rem;
  background: color-mix(in srgb, var(--color-accent) 11%, transparent);
  color: var(--color-accent-soft);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  line-height: 1;
}

.error-surface-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(18rem, 0.92fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
  min-width: 0;
}

.error-surface-copy {
  display: grid;
  min-width: 0;
  gap: var(--space-3);
}

.error-surface-copy h1,
.error-surface-copy h2,
.error-surface-copy p {
  margin: 0;
}

.error-surface-copy h1,
.error-surface-copy h2 {
  max-width: 12ch;
  font-size: clamp(2rem, 5vw, 3.65rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.navigation-error-surface .error-surface-copy h2 {
  max-width: 18ch;
  font-size: clamp(1.7rem, 6vw, 2.65rem);
  letter-spacing: -0.045em;
}

.error-surface-copy p {
  max-width: 35rem;
  color: var(--color-text-muted);
  font-size: clamp(0.96rem, 1.6vw, 1.05rem);
  line-height: 1.65;
}

.error-surface-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.error-surface-action {
  display: inline-flex;
  min-height: var(--control-min);
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  padding: 0.72rem 1rem;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
  box-shadow: var(--shadow-control);
  color: var(--color-on-accent);
  font-weight: 800;
  line-height: 1.15;
  text-align: center;
  text-decoration: none;
}

.error-surface-action[hidden] {
  display: none;
}

.error-surface-action.secondary {
  border-color: var(--color-border);
  background: rgb(255 255 255 / 4%);
  box-shadow: none;
  color: var(--color-text);
}

.error-surface-action:hover:not(:disabled) {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.error-surface-action.secondary:hover:not(:disabled) {
  border-color: var(--color-border-hover);
  background: rgb(255 255 255 / 7%);
  filter: none;
}

.error-surface-brand:focus-visible,
.error-surface-action:focus-visible {
  outline: 0.1875rem solid var(--color-accent-soft);
  outline-offset: 0.1875rem;
}

.error-surface-scene {
  position: relative;
  min-width: 0;
  min-height: 23rem;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--color-accent) 20%, var(--color-border));
  border-radius: 2rem;
  background:
    radial-gradient(circle at 72% 24%, rgb(75 141 255 / 18%), transparent 9rem),
    radial-gradient(circle at 28% 76%, rgb(118 92 255 / 22%), transparent 10rem),
    linear-gradient(145deg, rgb(255 255 255 / 3%), transparent 56%),
    color-mix(in srgb, var(--color-surface-soft) 88%, var(--color-canvas));
  box-shadow:
    inset 0 1px 0 rgb(255 255 255 / 5%),
    0 1.5rem 3.5rem rgb(0 0 0 / 22%);
  isolation: isolate;
}

.error-surface-scene::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgb(255 255 255 / 2.5%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 2.5%) 1px, transparent 1px);
  background-size: 2.75rem 2.75rem;
  content: "";
  mask-image: radial-gradient(circle at center, black, transparent 78%);
  opacity: 0.55;
}

.error-surface-board {
  position: absolute;
  top: 47%;
  left: 46%;
  width: min(13.5rem, 64%);
  aspect-ratio: 1;
  border: 1px solid color-mix(in srgb, var(--color-accent) 28%, var(--color-border));
  border-radius: 1.45rem;
  background:
    linear-gradient(
      90deg,
      transparent 32.8%,
      rgb(255 255 255 / 9%) 33%,
      rgb(255 255 255 / 9%) 33.7%,
      transparent 33.9%,
      transparent 66%,
      rgb(255 255 255 / 9%) 66.2%,
      rgb(255 255 255 / 9%) 66.9%,
      transparent 67.1%
    ),
    linear-gradient(
      transparent 32.8%,
      rgb(255 255 255 / 9%) 33%,
      rgb(255 255 255 / 9%) 33.7%,
      transparent 33.9%,
      transparent 66%,
      rgb(255 255 255 / 9%) 66.2%,
      rgb(255 255 255 / 9%) 66.9%,
      transparent 67.1%
    ),
    linear-gradient(145deg, #232a50, #151a34);
  box-shadow:
    0 1.75rem 3.5rem rgb(0 0 0 / 34%),
    inset 0 0 0 0.35rem rgb(255 255 255 / 2%);
  transform: translate(-50%, -50%) rotate(-9deg);
}

.error-surface-board-piece,
.error-surface-falling-piece {
  position: absolute;
  width: clamp(1.85rem, 5vw, 2.55rem);
  aspect-ratio: 1;
  border: 0.18rem solid rgb(255 255 255 / 18%);
  border-radius: 50%;
  background: linear-gradient(145deg, #8f79ff, #516fff);
  box-shadow:
    0 0.7rem 1.35rem rgb(0 0 0 / 30%),
    inset 0 0 0 0.2rem rgb(255 255 255 / 8%);
}

.error-surface-board-piece-one {
  top: 10%;
  left: 10%;
}

.error-surface-board-piece-two {
  top: 43%;
  left: 43%;
  background: linear-gradient(145deg, #6ca6ff, #5657db);
}

.error-surface-board-piece-three {
  right: 10%;
  bottom: 10%;
  background: linear-gradient(145deg, #c0b7ff, #7560ef);
}

.error-surface-falling-piece {
  z-index: 3;
  top: 46%;
  left: 57%;
  transform: translate3d(3.75rem, 5.35rem, 0) rotate(315deg);
}

.error-surface-not-found .error-surface-falling-piece {
  animation: error-piece-fall 4.4s cubic-bezier(0.22, 0.76, 0.24, 1) infinite;
}

.error-surface-piece-shadow {
  position: absolute;
  z-index: 2;
  top: 82%;
  left: 72%;
  width: 4.2rem;
  height: 1rem;
  border-radius: 50%;
  background: rgb(0 0 0 / 28%);
  filter: blur(0.35rem);
  transform: translate(-50%, -50%) scale(0.86);
}

.error-surface-not-found .error-surface-piece-shadow {
  animation: error-piece-shadow 4.4s ease-in-out infinite;
}

.error-surface-board-static {
  top: 50%;
  left: 50%;
  filter: saturate(0.58) brightness(0.82);
  transform: translate(-50%, -50%) rotate(5deg);
}

.error-surface-pause-mark {
  position: absolute;
  z-index: 4;
  top: 50%;
  left: 50%;
  display: grid;
  width: 5.3rem;
  height: 5.3rem;
  grid-template-columns: repeat(2, 0.72rem);
  place-content: center;
  gap: 0.6rem;
  border: 1px solid color-mix(in srgb, var(--color-accent) 30%, var(--color-border));
  border-radius: 1.55rem;
  background: rgb(7 9 24 / 80%);
  box-shadow:
    0 1.2rem 3rem rgb(0 0 0 / 34%),
    inset 0 0 0 1px rgb(255 255 255 / 4%);
  transform: translate(-50%, -50%);
}

.error-surface-pause-mark::before,
.error-surface-pause-mark::after {
  width: 0.72rem;
  height: 2.15rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--color-accent-soft), var(--color-accent-secondary));
  content: "";
}

.navigation-error-surface {
  margin-inline: auto;
  margin-top: clamp(1rem, 4vw, 3rem);
  background:
    linear-gradient(145deg, rgb(118 92 255 / 8%), transparent 52%),
    var(--color-surface);
}

@keyframes error-piece-fall {
  0%,
  12% {
    opacity: 0;
    transform: translate3d(-1rem, -7rem, 0) rotate(-28deg) scale(0.92);
  }

  18% {
    opacity: 1;
  }

  52% {
    transform: translate3d(0.3rem, -0.25rem, 0) rotate(88deg) scale(1);
  }

  68% {
    transform: translate3d(3.35rem, 5.4rem, 0) rotate(232deg) scale(0.98, 1.02);
  }

  77% {
    transform: translate3d(3.55rem, 4.78rem, 0) rotate(275deg) scale(1.03, 0.97);
  }

  86%,
  94% {
    opacity: 1;
    transform: translate3d(3.75rem, 5.35rem, 0) rotate(315deg) scale(1);
  }

  100% {
    opacity: 0;
    transform: translate3d(3.75rem, 5.35rem, 0) rotate(315deg) scale(1);
  }
}

@keyframes error-piece-shadow {
  0%,
  42% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.45);
  }

  68% {
    opacity: 0.7;
    transform: translate(-50%, -50%) scale(1);
  }

  77% {
    opacity: 0.42;
    transform: translate(-50%, -50%) scale(0.82);
  }

  86%,
  94% {
    opacity: 0.68;
    transform: translate(-50%, -50%) scale(0.95);
  }

  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.95);
  }
}

@media (max-width: 52rem) {
  .error-surface-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .error-surface-copy h1,
  .error-surface-copy h2 {
    max-width: 17ch;
  }

  .error-surface-scene {
    min-height: 17rem;
  }

  .error-surface-board {
    width: min(11.5rem, 56%);
  }
}

@media (max-width: 34rem) {
  .error-document-page .shell {
    width: min(100% - 1rem, var(--content-max));
    padding-block: 0.5rem;
  }

  .error-surface {
    gap: var(--space-4);
    padding: 1rem;
  }

  .error-surface-standalone {
    border-radius: 1.25rem;
  }

  .error-surface-layout {
    gap: var(--space-5);
  }

  .error-surface-copy h1,
  .error-surface-copy h2 {
    font-size: clamp(1.9rem, 10vw, 2.5rem);
  }

  .error-surface-copy p {
    font-size: 0.94rem;
    line-height: 1.55;
  }

  .error-surface-actions {
    display: grid;
    margin-top: 0.25rem;
  }

  .error-surface-action {
    width: 100%;
  }

  .error-surface-scene {
    min-height: 13.75rem;
    border-radius: 1.3rem;
  }

  .error-surface-board {
    width: 9.5rem;
    border-radius: 1.1rem;
  }

  .error-surface-board-piece,
  .error-surface-falling-piece {
    width: 1.8rem;
  }

  .error-surface-pause-mark {
    width: 4.4rem;
    height: 4.4rem;
    border-radius: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .error-surface-action {
    transition: none;
  }

  .error-surface-action:hover {
    transform: none;
  }

  .error-surface-not-found .error-surface-falling-piece,
  .error-surface-not-found .error-surface-piece-shadow {
    animation: none;
  }
}