:root{--bg:#f6f8fb;--card:#fff;--accent:#2563eb}
body{font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:#0f172a;margin:0;padding:24px}
.container{max-width:900px;margin:0 auto}
.card{background:var(--card);padding:18px;border-radius:10px;box-shadow:0 6px 18px rgba(15,23,42,0.06);margin-bottom:18px}
h1{margin:0 0 12px}
label{display:block;margin-top:10px;font-weight:600}
input[type=text],input[type=password],.response,input[type=file]{width:100%;padding:8px;border:1px solid #e6eef8;border-radius:6px;margin-top:6px}
button{margin-top:12px;background:var(--accent);color:#fff;border:none;padding:10px 14px;border-radius:8px;cursor:pointer}
button:disabled{opacity:0.6;cursor:not-allowed}
.status{font-size:0.95rem;color:#334155;margin-bottom:6px}
.response{background:#0b1220;color:#e6eef8;padding:12px;border-radius:8px;min-height:180px;overflow:auto}
.hint{color:#b91c1c;margin-top:6px}
footer{font-size:0.85rem;color:#475569;margin-top:12px}