:root{
  --bg:#f4f6fb; --card:#ffffff; --ink:#1c2230; --muted:#6b7385;
  --line:#e6e9f2; --accent:#4f46e5; --accent-2:#7c3aed; --warn:#d97706; --ok:#16a34a;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif}

.topbar{display:flex;justify-content:space-between;align-items:center;
  padding:18px 28px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:14px}
.logo{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-size:22px;font-weight:700}
h1{font-size:18px;margin:0}
.tagline{margin:2px 0 0;color:var(--muted);font-size:13px}
.badge{background:#fff7ed;color:var(--warn);border:1px solid #fed7aa;
  padding:6px 12px;border-radius:999px;font-size:12px;font-weight:600}
.badge-live{background:#ecfdf5;color:var(--ok);border-color:#a7f3d0}
.topnav{display:flex;gap:14px;align-items:center}
.topnav a{color:var(--accent);text-decoration:none;font-size:13px;font-weight:600}
.topnav a:hover{text-decoration:underline}

.grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:1000px;margin:26px auto;padding:0 20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px}
.card h2{font-size:14px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin:0 0 16px}

.field-label{display:block;font-size:12px;color:var(--muted);margin:14px 0 6px;font-weight:600}
.dropzone{display:flex;align-items:center;justify-content:center;height:96px;
  border:2px dashed var(--line);border-radius:12px;cursor:pointer;color:var(--muted);transition:.15s}
.dropzone:hover{border-color:var(--accent);color:var(--accent)}
textarea{width:100%;min-height:90px;border:1px solid var(--line);border-radius:12px;
  padding:12px;font:inherit;resize:vertical}
.row{display:flex;gap:12px}
.col{flex:1}
select{width:100%;padding:10px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff}

.actions{display:flex;gap:10px;margin-top:18px}
.btn{flex:1;padding:11px 14px;border:1px solid var(--line);background:#fff;border-radius:10px;
  font:inherit;font-weight:600;cursor:pointer;transition:.15s}
.btn:hover{border-color:var(--accent)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border:none}
.btn-primary:hover{opacity:.92}

.output{min-height:220px;border:1px solid var(--line);border-radius:12px;padding:14px;
  background:#0d1117;color:#c9d1d9;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:13px;white-space:pre-wrap;overflow:auto}
.output.placeholder{background:#fafbff;color:var(--muted);display:flex;align-items:center;
  justify-content:center;text-align:center;font-family:inherit}
.status{margin-top:12px;font-size:13px;color:var(--muted);min-height:18px}

.footer{max-width:1000px;margin:10px auto 40px;padding:0 20px;color:var(--muted);
  font-size:12px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.footer .dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--warn)}
.footer .dot.ok{background:var(--ok)}
.footer a{color:var(--accent);text-decoration:none}

.btn-block{width:100%;flex:none;margin-top:14px}
.dropzone.drag{border-color:var(--accent);color:var(--accent);background:#f5f6ff}
.divider{height:1px;background:var(--line);margin:22px 0}
.hint{margin:8px 0 0;font-size:12px;color:var(--muted)}
.soon{font-size:11px;color:var(--warn);background:#fff7ed;border:1px solid #fed7aa;
  padding:2px 8px;border-radius:999px;margin-left:8px;text-transform:none;
  letter-spacing:0;font-weight:600;vertical-align:middle}

@media(max-width:760px){.grid{grid-template-columns:1fr}}