:root{--ink:#0f172a;--muted:#475569;--line:#e2e8f0;--bg:#f8fafc;--brand:#0ea5e9;--accent:#22c55e}
*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink)}
header{padding:16px 24px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:16px}
header .brand{display:flex;align-items:center;gap:12px}
header img#logo{width:48px;height:48px;object-fit:contain;border-radius:8px;background:rgba(255,255,255,.06)}
header nav a{color:#fff;text-decoration:none;padding:8px 10px;border-radius:8px}
header nav a:hover{background:rgba(255,255,255,.12)}
main{max-width:1100px;margin:0 auto;padding:24px;display:grid;gap:16px}
.panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
label{display:block;font-size:14px;color:var(--muted)}
select,input,textarea{width:100%;padding:10px;border:1px solid #cbd5e1;border-radius:8px;font-size:14px;color:var(--ink);background:#fff}
textarea#output{width:100%;min-height:180px}
.grid{display:grid;gap:12px}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.grid.three{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px}
button,a#openMeshy{background:var(--brand);color:#fff;border:0;padding:10px 14px;border-radius:10px;cursor:pointer;text-decoration:none}
button:hover,a#openMeshy:hover{filter:brightness(.95)}#downloadZip{background:var(--accent)}
footer{text-align:center;padding:16px;color:var(--muted)}