.error-page {
  --error-panel-start: var(--color-hero-gradient-mid);
  --error-panel-end: var(--color-hero-gradient-end);

  min-height: 100vh;
  min-height: 100svh;
  background: var(--color-page);
}

.error-page--400 {
  --error-panel-start: var(--case-blue-bg);
  --error-panel-end: var(--color-hero-gradient-end);
}

.error-page--403 {
  --error-panel-start: #303038;
  --error-panel-end: var(--case-dark-bg);
}

.error-page--404 {
  --error-panel-start: var(--color-hero-gradient-mid);
  --error-panel-end: var(--color-hero-gradient-end);
}

.error-page--410 {
  --error-panel-start: #5f4a98;
  --error-panel-end: #231b47;
}

.error-page--500 {
  --error-panel-start: #4a1899;
  --error-panel-end: #17072f;
}

.error-page--503 {
  --error-panel-start: #35468d;
  --error-panel-end: #111936;
}

.error-skip-link {
  position: fixed;
  top: 12px;
  left: 50%;
  z-index: 200;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-strong);
  color: var(--color-white);
  line-height: var(--line-height-compact);
  transform: translate(-50%, calc(-100% - 24px));
  transition: transform 160ms ease;
}

.error-skip-link:focus {
  transform: translate(-50%, 0);
}

.error-shell {
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
}

.error-header,
.error-main,
.error-footer {
  width: min(100%, calc(var(--container-max) + var(--container-padding) + var(--container-padding)));
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.error-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--header-padding-block);
}

.error-brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  border-radius: var(--radius-sm);
}

.error-brand img {
  width: auto;
  height: var(--brand-logo-height);
}

.error-header__label {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding-inline: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface-soft);
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  line-height: var(--line-height-compact);
  white-space: nowrap;
}

.error-main {
  display: grid;
  align-items: center;
  padding-block: clamp(20px, 3vw, 56px);
}

.error-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  width: 100%;
  min-height: clamp(520px, 62vh, 720px);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: 0 28px 72px rgba(21, 8, 99, 0.08);
}

.error-card__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: clamp(34px, 5vw, 92px);
}

.error-card__status {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 10px;
  min-height: var(--chip-height);
  padding-inline: var(--chip-padding-x);
  border-radius: var(--chip-radius);
  background: var(--color-border);
  color: var(--color-text);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-compact);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.error-card__status::before {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-strong);
  box-shadow: 0 0 0 5px rgba(76, 57, 252, 0.12);
  content: "";
}

.error-card__title {
  max-width: 880px;
  margin-top: clamp(24px, 2.2vw, 38px);
  color: var(--color-text);
  font-size: clamp(2.5rem, 4.8vw, 5.25rem);
  font-weight: var(--font-weight-medium);
  line-height: 0.98;
  letter-spacing: -0.035em;
  overflow-wrap: break-word;
}

.error-card__copy {
  max-width: 680px;
  margin-top: clamp(24px, 2vw, 36px);
  color: var(--color-text-muted);
  font-size: var(--font-size-content-copy);
  line-height: var(--line-height-loose);
}

.error-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(30px, 2.7vw, 48px);
}

.error-card__action {
  min-width: min(100%, 210px);
  min-height: 56px;
  padding-inline: clamp(20px, 1.7vw, 32px);
  font-size: var(--type-text-lg);
}

.error-card__visual {
  position: relative;
  display: grid;
  place-items: center;
  min-width: 0;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 24% 18%, var(--color-hero-radial-core) 0, rgba(48, 12, 255, 0.2) 26%, transparent 48%),
    linear-gradient(145deg, var(--error-panel-start), var(--error-panel-end));
}

.error-card__visual::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0 2px, transparent 2.5px);
  background-position: center;
  background-size: 26px 26px;
  opacity: 0.48;
  content: "";
  -webkit-mask-image: linear-gradient(to bottom, transparent 4%, #000 34%, #000 66%, transparent 96%);
  mask-image: linear-gradient(to bottom, transparent 4%, #000 34%, #000 66%, transparent 96%);
}

.error-card__visual::after {
  position: absolute;
  width: min(70%, 430px);
  aspect-ratio: 1;
  z-index: -1;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 42% 58% 62% 38% / 56% 42% 58% 44%;
  box-shadow:
    0 0 0 44px rgba(255, 255, 255, 0.035),
    0 0 0 88px rgba(255, 255, 255, 0.022);
  transform: rotate(-12deg);
  content: "";
}

.error-card__code {
  position: relative;
  z-index: 1;
  color: var(--color-white);
  font-size: clamp(7rem, 16vw, 18rem);
  font-weight: var(--font-weight-semibold);
  line-height: 0.78;
  letter-spacing: -0.09em;
  text-shadow: 0 18px 48px rgba(7, 5, 45, 0.3);
  transform: translateX(-0.04em);
}

.error-card__code::after {
  position: absolute;
  right: -0.08em;
  bottom: -0.18em;
  width: 0.16em;
  height: 0.16em;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 0.045em rgba(255, 255, 255, 0.16);
  content: "";
}

.error-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: 22px 28px;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.error-footer p:last-child {
  text-align: right;
}

@media (max-width: 1024px) {
  .error-card {
    grid-template-columns: 1fr;
  }

  .error-card__content {
    min-height: 500px;
  }

  .error-card__visual {
    min-height: clamp(250px, 42vw, 390px);
  }

  .error-card__code {
    font-size: clamp(8rem, 29vw, 15rem);
  }
}

@media (max-width: 767.98px) {
  .error-header,
  .error-main,
  .error-footer {
    padding-inline: 20px;
  }

  .error-header {
    padding-block: 14px 24px;
  }

  .error-brand img {
    height: var(--brand-logo-mobile-height);
  }

  .error-header__label {
    min-height: 34px;
    padding-inline: 11px;
  }

  .error-main {
    align-items: start;
    padding-block: 0 28px;
  }

  .error-card {
    min-height: 0;
    border-radius: 24px;
  }

  .error-card__content {
    min-height: 0;
    padding: clamp(28px, 8vw, 48px) 20px;
  }

  .error-card__title {
    font-size: clamp(2.5625rem, 12vw, 4.25rem);
  }

  .error-card__actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .error-card__action {
    width: 100%;
    min-width: 0;
    min-height: 52px;
  }

  .error-card__visual {
    min-height: clamp(220px, 66vw, 330px);
  }

  .error-footer {
    align-items: flex-start;
    padding-block: 18px 24px;
  }
}

@media (max-width: 520px) {
  .error-header__label {
    max-width: 46vw;
    min-width: 0;
    padding-block: var(--space-2);
    white-space: normal;
    text-align: center;
  }

  .error-footer {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .error-footer p:last-child {
    text-align: left;
  }
}

@media (max-width: 360px) {
  .error-header,
  .error-main,
  .error-footer {
    padding-inline: 14px;
  }

  .error-card__content {
    padding-inline: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .error-page *,
  .error-page *::before,
  .error-page *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}