/* 404 page: fills the screen below the fixed header (header + this section = 100% of the viewport) */
.error-page-standalone {
  min-height: calc(100vh - var(--header-height));
  min-height: calc(100svh - var(--header-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background: var(--blue-light);
}
.error-content-card {
  max-width: 640px;
  text-align: center;
  background: #fff;
  border: 1px solid rgba(29, 78, 216, .08);
  border-radius: 24px;
  padding: 2.75rem 2rem;
  box-shadow:
    0 2px 6px rgba(7, 26, 77, .04),
    0 12px 28px rgba(7, 26, 77, .08),
    0 32px 64px rgba(7, 26, 77, .10);
}
.error-logo { display: block; width: 180px; max-width: 60%; height: auto; margin: 0 auto 1rem; }
.error-code { font-size: 4rem; font-weight: 700; color: var(--blue); line-height: 1; margin-bottom: 1rem; }
.error-title-modern { font-size: 1.8rem; font-weight: 700; }
.error-desc-modern { color: var(--muted); margin-bottom: 1.5rem; }