:root{ --bg:#0f172a; --panel:#0b1324; --accent:#22d3ee; --text:#e5e7eb; --muted:#9ca3af; --danger:#ef4444; }
*{box-sizing:border-box}
html,body{height:100%}
body{ margin:0; font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial; background: radial-gradient(1200px 600px at 10% -10%, #0b1324 20%, #0f172a 60%), var(--bg); color:var(--text); display:grid; place-items:center; }
.wrap{width:100%; max-width:820px; padding:24px}
.topbar{display:flex; align-items:center; gap:12px; margin-bottom:14px}
.logo{width:36px; height:36px}
.title{font-size:1.2rem; letter-spacing:.2px}
.subtitle{color:var(--muted); margin-top:-6px}
.card{ background:linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)); border:1px solid rgba(255,255,255,0.08); border-radius:16px; padding:22px; box-shadow:0 10px 30px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.05); backdrop-filter: blur(8px); }
.form{display:grid; gap:16px}
.field{display:grid; gap:8px}
label{color:var(--muted); font-size:.9rem}
input[type="file"], select, input[type="number"]{ width:100%; background:#0b1324; color:var(--text); border:1px solid rgba(255,255,255,.12); border-radius:10px; padding:12px 14px; outline:none; }
.row{display:grid; grid-template-columns:1fr 1fr; gap:12px}
.btn{ background:linear-gradient(135deg, #22d3ee, #06b6d4); color:#001219; border:none; border-radius:12px; padding:12px 16px; font-weight:600; cursor:pointer; box-shadow:0 8px 20px rgba(6,182,212,.35); transition:transform .05s ease-in-out; }
.btn:active{transform:translateY(1px)}
.hint{color:var(--muted); font-size:.85rem}
.msg{ margin-top:6px; padding:10px 12px; border-radius:10px; display:none; }
.msg.error{ color:#fecaca; background:rgba(239,68,68,.12); border:1px solid rgba(239,68,68,.35); display:block; }
.result{ margin-top:10px; padding:12px; border:1px dashed rgba(255,255,255,.18); border-radius:10px; display:none; word-break:break-all; }
.result a{color:#67e8f9; text-decoration:none}
.result a:hover{text-decoration:underline}
.footer{margin-top:16px; color:var(--muted); font-size:.9rem; text-align:center}
@media (max-width:640px){ .row{grid-template-columns:1fr} }