step 9.3: done

public/404.html

@@ -0,0 +1,95 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Emberfall — Page Not Found</title>
+  <link rel="stylesheet" href="/css/main.css">
+  <style>
+    .error-page {
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+      justify-content: center;
+      min-height: 60vh;
+      text-align: center;
+      padding: 2rem;
+    }
+
+    .error-code {
+      font-size: 6rem;
+      font-weight: bold;
+      color: var(--accent, #e2822b);
+      line-height: 1;
+      margin-bottom: 0.5rem;
+    }
+
+    .error-title {
+      font-size: 1.5rem;
+      color: var(--text, #eadfce);
+      margin-bottom: 1rem;
+    }
+
+    .error-message {
+      font-size: 1rem;
+      color: var(--muted, #a59a8a);
+      margin-bottom: 2rem;
+      max-width: 400px;
+    }
+
+    .error-actions {
+      display: flex;
+      gap: 1rem;
+      flex-wrap: wrap;
+      justify-content: center;
+    }
+
+    .error-actions a {
+      display: inline-block;
+      padding: 0.5rem 1.25rem;
+      border-radius: 4px;
+      text-decoration: none;
+      font-size: 0.875rem;
+      font-weight: 600;
+      transition: opacity 0.2s;
+    }
+
+    .error-actions a:hover {
+      opacity: 0.85;
+    }
+
+    .btn-home {
+      background: var(--accent, #e2822b);
+      color: #fff;
+    }
+
+    .btn-back {
+      background: transparent;
+      color: var(--accent, #e2822b);
+      border: 1px solid var(--accent, #e2822b);
+    }
+
+    /* Server-only error (500) */
+    .error-code.server {
+      color: var(--danger, #c0392b);
+    }
+
+    .error-message.server {
+      color: var(--muted, #a59a8a);
+    }
+  </style>
+</head>
+<body>
+  <div class="error-page">
+    <div class="error-code" id="error-code">404</div>
+    <h1 class="error-title" id="error-title">Page Not Found</h1>
+    <p class="error-message" id="error-message">
+      The page you're looking for has gone dark. Perhaps it was never here, or has been consumed by the shadows.
+    </p>
+    <div class="error-actions">
+      <a href="/" class="btn-home">Return to Emberfall</a>
+      <a href="javascript:history.back()" class="btn-back">Go Back</a>
+    </div>
+  </div>
+</body>
+</html>