:root {
  --error-bg: #f4f7fb;
  --error-card-bg: linear-gradient(145deg, #ffffff 0%, #f8fbff 100%);
  --error-card-border: #dfe7f2;
  --error-text: #10213a;
  --error-muted: #61708a;
  --error-primary: #2563eb;
}

.error-body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: var(--error-bg);
  color: var(--error-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.error-header {
  background: white;
  border-bottom: 1px solid var(--error-card-border);
  padding: 1rem 0;
}

.error-brand {
  color: var(--error-text);
  text-decoration: none;
  font-weight: 800;
  font-size: 1.2rem;
}

.error-footer {
  background: white;
  border-top: 1px solid var(--error-card-border);
  padding: 1.5rem 0;
  margin-top: auto;
}

.error-footer p {
  margin: 0 0 0.5rem;
  color: var(--error-muted);
}

.error-footer-links {
  display: flex;
  gap: 1rem;
}

.error-footer-links a {
  color: var(--error-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.error-footer-links a:hover {
  color: var(--error-primary);
}

.error-page {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 2rem 0 3rem;
}

.error-card {
  width: min(600px, 100%);
  background: var(--error-card-bg);
  border: 1px solid var(--error-card-border);
  border-radius: 28px;
  box-shadow: 0 24px 60px rgba(16, 33, 58, 0.12);
  padding: 2.4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.error-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 45%);
  pointer-events: none;
}

.error-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 78px;
  height: 78px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.1);
  color: var(--error-primary);
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
  border: 1px solid rgba(37, 99, 235, 0.12);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.45);
}

.error-accent {
  width: 72px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--error-primary), #60a5fa);
  margin: 0 auto 1rem;
}

.error-title {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin: 0 0 .6rem;
  color: var(--error-text);
}

.error-message {
  color: var(--error-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0 auto 1.6rem;
  max-width: 480px;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: .8rem;
  flex-wrap: wrap;
}

.error-actions .btn {
  min-width: 160px;
}

@media (max-width: 800px) {
  .error-card {
    padding: 1.6rem;
  }

  .error-actions {
    flex-direction: column;
    align-items: center;
  }

  .error-actions .btn {
    width: 100%;
  }
}