.error-page {
  --error-bg: #07070d;
  --error-panel: rgba(16, 14, 25, 0.82);
  --error-panel-strong: rgba(23, 18, 35, 0.92);
  --error-border: rgba(255, 255, 255, 0.11);
  --error-muted: rgba(245, 245, 245, 0.72);
  --error-soft: rgba(245, 245, 245, 0.56);
  --error-violet: #a855f7;
  --error-magenta: #d946ef;
  --error-cyan: #22d3ee;
  --error-gold: #fbbf24;

  position: relative;
  isolation: isolate;
  min-height: calc(100vh - var(--header-height));
  overflow: hidden;
  padding: clamp(54px, 6vw, 88px) 0 clamp(64px, 7vw, 104px);
  color: #fffefa;
  background:
    radial-gradient(circle at 16% 14%, rgba(168, 85, 247, 0.2), transparent 26%),
    radial-gradient(circle at 86% 18%, rgba(34, 211, 238, 0.12), transparent 24%),
    radial-gradient(circle at 50% 110%, rgba(217, 70, 239, 0.17), transparent 30%),
    linear-gradient(180deg, #0a0812 0%, var(--error-bg) 48%, #050509 100%);
}

.error-page::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.026) 1px, transparent 1px);
  background-size: 78px 78px;
  mask-image: linear-gradient(180deg, transparent 0%, #000 18%, #000 82%, transparent 100%);
}

.error-page::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(circle at 9% 44%, rgba(168, 85, 247, 0.5) 0 1px, transparent 2px),
    radial-gradient(circle at 28% 20%, rgba(34, 211, 238, 0.56) 0 1px, transparent 2px),
    radial-gradient(circle at 43% 34%, rgba(251, 191, 36, 0.48) 0 1px, transparent 2px),
    radial-gradient(circle at 68% 22%, rgba(168, 85, 247, 0.52) 0 1px, transparent 2px),
    radial-gradient(circle at 88% 42%, rgba(217, 70, 239, 0.5) 0 1px, transparent 2px),
    radial-gradient(circle at 76% 74%, rgba(34, 211, 238, 0.42) 0 1px, transparent 2px);
  opacity: 0.9;
}

.error-background,
.error-background span {
  position: absolute;
  pointer-events: none;
}

.error-background {
  inset: 0;
  z-index: -1;
}

.error-star {
  width: 12px;
  height: 12px;
  background: var(--error-violet);
  clip-path: polygon(50% 0, 61% 38%, 100% 50%, 61% 62%, 50% 100%, 39% 62%, 0 50%, 39% 38%);
  filter: drop-shadow(0 0 12px rgba(168, 85, 247, 0.9));
}

.error-star--one {
  top: 13%;
  left: 12%;
}

.error-star--two {
  top: 20%;
  right: 15%;
  background: var(--error-cyan);
  filter: drop-shadow(0 0 12px rgba(34, 211, 238, 0.78));
  transform: scale(0.72);
}

.error-star--three {
  left: 7%;
  bottom: 27%;
  background: var(--error-magenta);
  transform: scale(0.9);
}

.error-star--four {
  right: 9%;
  bottom: 18%;
  background: var(--error-gold);
  filter: drop-shadow(0 0 12px rgba(251, 191, 36, 0.62));
  transform: scale(0.6);
}

.error-container {
  position: relative;
  z-index: 1;
  max-width: 1288px;
}

.error-hero {
  display: grid;
  grid-template-columns: minmax(470px, 1fr) minmax(500px, 0.85fr);
  align-items: center;
  gap: clamp(34px, 5vw, 72px);
}

.error-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: clamp(340px, 34vw, 460px);
  border: 1px solid var(--error-border);
  border-radius: 28px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 54%, rgba(168, 85, 247, 0.22), transparent 36%),
    radial-gradient(circle at 22% 20%, rgba(34, 211, 238, 0.09), transparent 24%),
    linear-gradient(145deg, rgba(21, 17, 34, 0.92), rgba(5, 5, 12, 0.96));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 30px 90px rgba(0, 0, 0, 0.38),
    0 0 58px rgba(168, 85, 247, 0.18);
}

.error-visual::before,
.error-visual::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.error-visual::before {
  width: min(84%, 480px);
  aspect-ratio: 1;
  border: 1px solid rgba(168, 85, 247, 0.24);
  border-radius: 50%;
  box-shadow:
    inset 0 0 40px rgba(168, 85, 247, 0.08),
    0 0 46px rgba(168, 85, 247, 0.08);
}

.error-visual::after {
  inset: auto 10% 13% 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(168, 85, 247, 0.8), rgba(34, 211, 238, 0.55), transparent);
  filter: blur(0.3px);
  opacity: 0.75;
}

.error-orbit {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.error-orbit--outer {
  width: min(74%, 430px);
  aspect-ratio: 1;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.error-orbit--inner {
  width: min(54%, 310px);
  aspect-ratio: 1;
  border: 1px dashed rgba(34, 211, 238, 0.28);
  transform: rotate(-18deg);
}

.error-planet {
  position: absolute;
  top: 18%;
  right: 18%;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.9), transparent 9%),
    linear-gradient(135deg, var(--error-cyan), #6d28d9 68%);
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.46);
}

.error-code {
  position: relative;
  z-index: 1;
  color: #fffefa;
  font-size: clamp(7rem, 15vw, 13.1rem);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: 0;
  text-shadow:
    0 0 18px rgba(168, 85, 247, 0.88),
    0 0 44px rgba(168, 85, 247, 0.48),
    0 10px 26px rgba(0, 0, 0, 0.58);
  background: linear-gradient(180deg, #ffffff 0%, #d8b4fe 42%, #8b5cf6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.error-scanline {
  position: absolute;
  left: 8%;
  right: 8%;
  top: 50%;
  height: 72px;
  transform: translateY(-50%);
  background: linear-gradient(180deg, transparent, rgba(168, 85, 247, 0.14), transparent);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  opacity: 0.78;
}

.error-copy {
  max-width: 640px;
}

.error-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  margin-bottom: 24px;
  padding: 10px 18px;
  border: 1px solid rgba(168, 85, 247, 0.32);
  border-radius: 999px;
  background: rgba(17, 14, 26, 0.78);
  color: #d8b4fe;
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 0 20px rgba(168, 85, 247, 0.1);
}

.error-kicker i {
  color: var(--error-cyan);
}

.error-copy h1 {
  max-width: 690px;
  margin: 0;
  color: #fffefa;
  font-size: clamp(2.65rem, 4.3vw, 4.45rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0;
}

.error-message {
  max-width: 610px;
  margin: 24px 0 36px;
  color: var(--error-muted);
  font-size: clamp(1.06rem, 1.45vw, 1.28rem);
  line-height: 1.65;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 58px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 14px;
  color: #fffefa;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.1;
  white-space: nowrap;
  box-shadow: none;
}

.error-btn:hover,
.error-btn:focus-visible {
  color: #fffefa;
  transform: translateY(-2px);
}

.error-btn:focus-visible,
.error-suggestion-card:focus-visible {
  outline: 2px solid transparent;
  box-shadow: var(--focus-ring);
}

.error-btn--primary {
  background: linear-gradient(135deg, #8b5cf6 0%, #c026d3 100%);
  box-shadow: 0 18px 34px rgba(168, 85, 247, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.error-btn--secondary {
  background: rgba(11, 10, 17, 0.62);
  border-color: rgba(255, 255, 255, 0.13);
}

.error-btn--secondary:hover,
.error-btn--secondary:focus-visible {
  border-color: rgba(34, 211, 238, 0.48);
  background: rgba(16, 15, 24, 0.84);
}

.error-suggestions {
  margin-top: clamp(42px, 5vw, 68px);
}

.error-suggestions h2 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin: 0 0 26px;
  color: #fffefa;
  font-size: clamp(1.35rem, 2.2vw, 1.9rem);
  font-weight: 800;
  line-height: 1.25;
  text-align: center;
}

.error-suggestions h2 span {
  display: block;
  width: 42px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(168, 85, 247, 0.84), transparent);
}

.error-suggestion-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.error-suggestion-card {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  min-height: 118px;
  padding: 22px;
  border: 1px solid var(--error-border);
  border-radius: 18px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018)),
    var(--error-panel);
  color: #fffefa;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.error-suggestion-card:hover,
.error-suggestion-card:focus-visible {
  color: #fffefa;
  border-color: rgba(168, 85, 247, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 22px 42px rgba(0, 0, 0, 0.28), 0 0 28px rgba(168, 85, 247, 0.13);
}

.error-suggestion-icon {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  border: 1px solid rgba(168, 85, 247, 0.24);
  border-radius: 16px;
  background: linear-gradient(145deg, rgba(168, 85, 247, 0.18), rgba(34, 211, 238, 0.08));
  color: #c084fc;
  font-size: 1.55rem;
}

.error-suggestion-text {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.error-suggestion-text strong {
  color: #fffefa;
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.24;
}

.error-suggestion-text small {
  color: var(--error-soft);
  font-size: 0.95rem;
  line-height: 1.45;
}

.error-suggestion-arrow {
  color: rgba(255, 255, 255, 0.45);
  font-size: 1rem;
}

[data-theme="light"] .error-page {
  --error-bg: #f6f7fb;
  --error-panel: rgba(255, 255, 255, 0.82);
  --error-panel-strong: rgba(255, 255, 255, 0.94);
  --error-border: rgba(15, 23, 42, 0.12);
  --error-muted: rgba(30, 41, 59, 0.76);
  --error-soft: rgba(51, 65, 85, 0.7);

  color: #111827;
  background:
    radial-gradient(circle at 16% 14%, rgba(168, 85, 247, 0.14), transparent 26%),
    radial-gradient(circle at 86% 18%, rgba(34, 211, 238, 0.13), transparent 24%),
    radial-gradient(circle at 50% 110%, rgba(251, 191, 36, 0.12), transparent 30%),
    linear-gradient(180deg, #fbfcff 0%, var(--error-bg) 48%, #edf2fa 100%);
}

[data-theme="light"] .error-visual,
[data-theme="light"] .error-suggestion-card,
[data-theme="light"] .error-kicker,
[data-theme="light"] .error-btn--secondary {
  background-color: rgba(255, 255, 255, 0.78);
}

[data-theme="light"] .error-copy h1,
[data-theme="light"] .error-suggestions h2,
[data-theme="light"] .error-suggestion-text strong,
[data-theme="light"] .error-suggestion-card {
  color: #111827;
}

[data-theme="light"] .error-btn--secondary {
  color: #111827;
}

[data-theme="light"] .error-btn--secondary:hover,
[data-theme="light"] .error-btn--secondary:focus-visible {
  color: #111827;
  background: rgba(255, 255, 255, 0.94);
}

@media (max-width: 1120px) {
  .error-hero {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .error-copy {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
  }

  .error-actions {
    justify-content: center;
  }

  .error-visual {
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
    min-height: clamp(300px, 47vw, 440px);
  }
}

@media (max-width: 860px) {
  .error-page {
    padding-top: 46px;
  }

  .error-suggestion-grid {
    grid-template-columns: 1fr;
    max-width: 620px;
    margin: 0 auto;
  }
}

@media (max-width: 560px) {
  .error-page {
    padding: 34px 0 56px;
  }

  .error-visual {
    min-height: 238px;
    border-radius: 22px;
  }

  .error-code {
    font-size: clamp(5.8rem, 28vw, 8.2rem);
  }

  .error-planet {
    top: 15%;
    right: 14%;
    width: 25px;
    height: 25px;
  }

  .error-copy h1 {
    font-size: clamp(2.15rem, 11vw, 3rem);
  }

  .error-message {
    margin: 18px 0 28px;
    font-size: 1rem;
  }

  .error-kicker {
    margin-bottom: 18px;
  }

  .error-actions {
    gap: 12px;
  }

  .error-btn {
    width: 100%;
    min-height: 56px;
    white-space: normal;
  }

  .error-suggestions {
    margin-top: 44px;
  }

  .error-suggestions h2 {
    gap: 12px;
  }

  .error-suggestions h2 span {
    width: 24px;
  }

  .error-suggestion-card {
    grid-template-columns: 52px minmax(0, 1fr) auto;
    min-height: 98px;
    padding: 16px;
    gap: 14px;
    border-radius: 15px;
  }

  .error-suggestion-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    font-size: 1.28rem;
  }

  .error-suggestion-text strong {
    font-size: 1rem;
  }

  .error-suggestion-text small {
    font-size: 0.86rem;
  }
}