<div class="error-container">
  <div class="error-code">404</div>
  <h1>Page Not Found</h1>
  <p>Sorry, we couldn&#39;t find the page you&#39;re looking for. It might have been moved or deleted.</p>
  <a href="/" class="home-link">Go Back Home</a>
</div>

.error-container {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  text-align: center;
  padding: 80px 20px;
  background: #ffffff;
  color: #1f2937;
}
.error-code {
  font-size: 8rem;
  font-weight: 900;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 20px;
}
.error-container h1 {
  font-size: 2rem;
  margin: 0 0 15px 0;
  color: #111827;
}
.error-container p {
  color: #6b7280;
  max-width: 400px;
  margin: 0 auto 40px auto;
  line-height: 1.6;
}
.home-link {
  display: inline-block;
  background: #111827;
  color: #fff;
  padding: 14px 30px;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}
.home-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}