body{font-family:system-ui,sans-serif;max-width:860px;margin:auto;padding:1rem;color:#222}header{display:flex;justify-content:space-between}.brand{font-weight:700;text-decoration:none}
.drop{display:block;border:2px dashed #888;padding:2rem;text-align:center;cursor:pointer}pre{background:#f5f5f5;padding:1rem;overflow:auto}button{padding:.7rem 1.2rem;font-size:1rem}footer{margin-top:3rem;font-size:.85rem;color:#666}