.error-page {
  display: grid;
  min-height: clamp(520px, 70vh, 760px);
  place-items: center;
  padding-block: var(--space-xl);
  background: radial-gradient(circle at 50% 20%, color-mix(in srgb, var(--color-gold) 12%, transparent), transparent 42%), var(--color-bg);
}
.error-page__container {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--space-xl);
  max-width: 980px;
}
.error-page__visual { position: relative; display: grid; place-items: center; min-height: 220px; }
.error-page__code {
  color: color-mix(in srgb, var(--color-gold) 16%, transparent);
  font-family: var(--font-heading);
  font-size: clamp(8rem, 28vw, 15rem);
  font-weight: 700;
  line-height: .75;
  letter-spacing: -.08em;
  user-select: none;
}
.error-page__icon {
  position: absolute;
  width: 88px;
  color: var(--color-gold-text);
  fill: var(--color-surface);
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.error-page__content { max-width: 560px; }
.error-page__eyebrow { margin-block-end: var(--space-xs); color: var(--color-gold-text); font-size: var(--fs-xs); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.error-page__title { margin-block-end: var(--space-sm); font-size: clamp(var(--fs-2xl), 6vw, var(--fs-3xl)); }
.error-page__description { color: var(--color-text-muted); font-size: var(--fs-md); line-height: var(--lh-relaxed); }
.error-page__lead { margin-block-end: var(--space-xs); color: var(--color-text); font-size: var(--fs-lg); font-weight: 600; }
.error-page__search { display: flex; gap: var(--space-xs); width: min(520px, 100%); margin-block-start: var(--space-lg); }
.error-page__search input {
  flex: 1; min-width: 0; min-height: 44px; padding-inline: var(--space-sm);
  border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface);
}
.error-page__search input:focus { outline: 2px solid var(--color-gold); outline-offset: 1px; }
.error-page__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-sm); margin-block-start: var(--space-lg); }
.error-page__retry { min-height: 42px; padding-inline: var(--space-md); border: 1px solid var(--color-border); border-radius: var(--radius-sm); color: var(--color-text); }
.error-page__retry:hover { border-color: var(--color-gold); color: var(--color-gold-text); }
.error-page__details { margin-block-start: var(--space-lg); color: var(--color-text-muted); font-size: var(--fs-xs); }
.error-page__details summary { width: fit-content; cursor: pointer; }
.error-page__details p { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-block-start: var(--space-xs); }
.error-page__details code { padding: var(--space-3xs) var(--space-2xs); border-radius: var(--radius-sm); background: var(--color-bg-raised); color: var(--color-text); }
@media (min-width: 768px) {
  .error-page__container { grid-template-columns: minmax(300px, .85fr) minmax(0, 1fr); }
}
@media (max-width: 767px) {
  .error-page__container { text-align: center; }
  .error-page__content { margin-inline: auto; }
  .error-page__actions { justify-content: center; }
  .error-page__search { margin-inline: auto; }
  .error-page__details summary { margin-inline: auto; }
  .error-page__details p { justify-content: center; }
}
@media (max-width: 480px) {
  .error-page__search { flex-direction: column; }
  .error-page__search .btn { width: 100%; }
}