.vault{font-family:system-ui,sans-serif;max-width:960px;margin:0 auto;padding:1.5rem}header h1{margin:0 0 .25rem}nav{display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0}nav button{padding:.4rem .75rem;cursor:pointer;border:1px solid #ccc;background:#f5f5f5;border-radius:4px}nav button.active{background:#1a1a2e;color:#fff;border-color:#1a1a2e}pre{background:#f0f0f0;padding:1rem;overflow:auto;font-size:.8rem;max-height:60vh}.error{color:#b00020}footer{margin-top:2rem;font-size:.9rem;color:#666}