diff --git a/404.php b/404.php
new file mode 100644
index 0000000..21d3cf2
--- /dev/null
+++ b/404.php
@@ -0,0 +1,164 @@
+<?php
+http_response_code(404);
+?>
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>404 – Seite nicht gefunden · Fabian Schieder</title>
+    <link rel="stylesheet" href="/style.css">
+    <style>
+        body {
+            justify-content: center;
+            align-items: center;
+            min-height: 100vh;
+            padding: 2rem 1rem;
+        }
+
+        .error-wrap {
+            display: flex;
+            flex-direction: column;
+            align-items: center;
+            text-align: center;
+            gap: 1.5rem;
+            max-width: 480px;
+            width: 100%;
+        }
+
+        .error-code {
+            font-size: clamp(6rem, 20vw, 10rem);
+            font-weight: 800;
+            line-height: 1;
+            background: linear-gradient(135deg, #6366f1 0%, #0ea5e9 60%, #a855f7 100%);
+            -webkit-background-clip: text;
+            -webkit-text-fill-color: transparent;
+            background-clip: text;
+            letter-spacing: -4px;
+            user-select: none;
+        }
+
+        .error-icon {
+            font-size: 3rem;
+            animation: float 3s ease-in-out infinite;
+        }
+
+        @keyframes float {
+            0%, 100% { transform: translateY(0); }
+            50%       { transform: translateY(-10px); }
+        }
+
+        .error-title {
+            font-size: 1.4rem;
+            font-weight: 700;
+            color: var(--text);
+            -webkit-text-fill-color: var(--text);
+            background: none;
+        }
+
+        .error-desc {
+            color: var(--text-muted);
+            font-size: 0.95rem;
+            line-height: 1.6;
+        }
+
+        .error-divider {
+            width: 48px;
+            height: 3px;
+            border-radius: 99px;
+            background: linear-gradient(90deg, #6366f1, #0ea5e9);
+            border: none;
+            margin: 0;
+        }
+
+        .error-actions {
+            display: flex;
+            gap: 0.75rem;
+            flex-wrap: wrap;
+            justify-content: center;
+        }
+
+        .btn {
+            display: inline-flex;
+            align-items: center;
+            gap: 0.5rem;
+            padding: 0.65rem 1.4rem;
+            border-radius: 10px;
+            font-size: 0.9rem;
+            font-weight: 600;
+            text-decoration: none;
+            transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
+            cursor: pointer;
+        }
+
+        .btn:hover {
+            transform: translateY(-2px);
+            box-shadow: 0 8px 24px rgba(0,0,0,0.35);
+        }
+
+        .btn:active {
+            transform: translateY(0);
+        }
+
+        .btn-primary {
+            background: linear-gradient(135deg, #6366f1, #0ea5e9);
+            color: #fff;
+        }
+
+        .btn-secondary {
+            background: var(--surface);
+            border: 1px solid var(--border);
+            color: var(--text);
+        }
+
+        .btn-secondary:hover {
+            border-color: rgba(255,255,255,0.2);
+        }
+
+        /* Glow hinter der 404 */
+        .glow {
+            position: fixed;
+            width: 500px;
+            height: 500px;
+            border-radius: 50%;
+            background: radial-gradient(circle, rgba(99,102,241,0.12) 0%, transparent 70%);
+            top: 50%;
+            left: 50%;
+            transform: translate(-50%, -60%);
+            pointer-events: none;
+            z-index: -1;
+        }
+    </style>
+</head>
+<body>
+
+<div class="background-blur"></div>
+<div class="glow"></div>
+
+<div class="error-wrap">
+    <div class="error-icon">🔍</div>
+
+    <div class="error-code">404</div>
+
+    <hr class="error-divider">
+
+    <h1 class="error-title">Seite nicht gefunden</h1>
+
+    <p class="error-desc">
+        Die Seite, die du suchst, existiert nicht (mehr)<br>
+        oder wurde vielleicht verschoben.
+    </p>
+
+    <div class="error-actions">
+        <a href="/" class="btn btn-primary">
+            ← Zurück zur Startseite
+        </a>
+        <a href="javascript:history.back()" class="btn btn-secondary">
+            Zurück
+        </a>
+    </div>
+</div>
+
+</body>
+</html>
+
diff --git a/index.php b/index.php
index 6af078e..dbe926f 100644
--- a/index.php
+++ b/index.php
@@ -54,7 +54,7 @@ $projects = [
         ],
     ],
 ];
-?>
+ ?>
 <!DOCTYPE html>
 <html lang="de">
 <head>
@@ -62,7 +62,6 @@ $projects = [
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Fabian Schieder</title>
     <link rel="stylesheet" href="/style.css">
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.0/css/all.min.css">
 </head>
 <body>
 
@@ -81,13 +80,13 @@ $projects = [
                 <?php
                 switch ($category) {
                     case "privat":
-                        echo '<i class="fas fa-lock"></i> Privat';
+                        echo '🔒 Privat';
                         break;
                     case "schule":
-                        echo '<i class="fas fa-graduation-cap"></i> Schule';
+                        echo '🎓 Schule';
                         break;
                     case "dienste":
-                        echo '<i class="fas fa-network-wired"></i> Dienste';
+                        echo '🔗 Verlinkungen';
                         break;
                 }
                 ?>
@@ -108,9 +107,11 @@ $projects = [
                                     src="<?= htmlspecialchars($project['logo'], ENT_QUOTES) ?>"
                                     alt="<?= htmlspecialchars($project['title'], ENT_QUOTES) ?> Logo"
                                     class="card-logo"
+                                    loading="lazy"
+                                    decoding="async"
                                 >
                             <?php else: ?>
-                                <i class="fas fa-folder"></i>
+                                <span aria-hidden="true">📁</span>
                             <?php endif; ?>
                         </div>
 
@@ -119,9 +120,7 @@ $projects = [
                             <p><?= htmlspecialchars($project['description'], ENT_QUOTES) ?></p>
                         </div>
 
-                        <div class="card-arrow">
-                            <i class="fas fa-arrow-right"></i>
-                        </div>
+                        <div class="card-arrow" aria-hidden="true">→</div>
                     </a>
                 <?php endforeach; ?>
             </div>
@@ -134,4 +133,5 @@ $projects = [
 </footer>
 
 </body>
-</html>
\ No newline at end of file
+</html>
+
