body { font-family: sans-serif; margin: 0; padding: 0; background: #f5f5f5; }
.container { max-width: 1000px; margin: 0 auto; padding: 20px; background: #fff; min-height: 100vh; }
h1 { color: #333; }
nav { margin: 10px 0; }
nav a { margin-right: 10px; }
table { width: 100%; border-collapse: collapse; margin: 10px 0; }
th, td { padding: 8px; text-align: left; border-bottom: 1px solid #ddd; }
th { background: #f0f0f0; }
.status-erkannt td { background: #fff9c4; }
.status-in_recherche td { background: #e3f2fd; }
.status-komplett td { background: #e8f5e9; }
.status-isbn_fehlt td { background: #fff3e0; }
.status-recherche_fehler td { background: #ffebee; }
.status-editiert td { background: #f3e5f5; }
.badge { padding: 2px 8px; border-radius: 4px; font-size: 0.85em; }
.error { color: red; }
button, .btn { padding: 6px 12px; cursor: pointer; }
input[type="file"] { margin: 10px 0; }