body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
margin:0;background:#f6f7fb;color:#222}
main{max-width:720px;margin:40px auto;padding:24px;background:#fff;border-radius:16px;
box-shadow:0 6px 24px rgba(0,0,0,.06)}
h2{margin-top:0}
.row{display:flex;flex-direction:column;margin:12px 0}
label{font-weight:600;margin-bottom:6px}
input[type="text"],input[type="file"]{padding:10px;border:1px solid #ddd;border-radius:8px;background:#fafafa}
button{margin-top:12px;margin-right:8px;padding:12px 16px;border:0;border-radius:10px;background:#222;color:#fff;font-weight:700;cursor:pointer}
button:hover{opacity:.9}
.hint{font-size:12px;color:#666;margin-top:8px}
#status{margin-top:16px;color:#0a7;word-break:break-all}