/* ========== 404-SEITE ========== */
.error-404-section {
  padding: 60px 20px 80px;
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  color: #333;
}

.error-404-code {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--indigo-200, #e3ebff);
  margin: 0 0 -0.5rem;
}

.error-404-section h1 {
  font-size: 2rem;
  color: #222;
  margin-bottom: 1rem;
}

.error-404-lead {
  font-size: 1.05rem;
  line-height: 1.6;
  color: #555;
  max-width: 460px;
  margin: 0 auto 2.5rem;
}

.error-404-cta {
  margin-bottom: 2.5rem;
}

.error-404-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.5rem;
  font-size: 0.95rem;
}

.error-404-links a {
  color: #0077cc;
  text-decoration: none;
}

.error-404-links a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  .error-404-section {
    padding: 40px 20px 60px;
  }

  .error-404-code {
    font-size: 2.75rem;
  }

  .error-404-section h1 {
    font-size: 1.5rem;
  }
}