:root{--bg:#0f1724;--card:#0b1220;--accent:#f59e0b;--muted:#94a3b8;--text:#e6eef8}
*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,'Helvetica Neue',Arial}
body{background:linear-gradient(180deg,#071026 0%, #071727 100%);color:var(--text);padding:20px}
header{display:flex;align-items:center;justify-content:space-between;gap:20px}
header h1{margin:0;font-size:1.1rem}
nav button{background:transparent;border:1px solid transparent;color:var(--muted);padding:8px 12px;border-radius:6px;cursor:pointer}
nav button.active{color:var(--text);border-color:rgba(255,255,255,0.06);background:rgba(255,255,255,0.02)}
main{max-width:820px;margin:28px auto;background:rgba(255,255,255,0.02);padding:20px;border-radius:10px}
label{display:block;margin-bottom:6px;color:var(--muted)}
textarea{width:100%;padding:12px;border-radius:8px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:var(--text);resize:vertical}
.row{display:flex;gap:10px;margin-top:10px}
button{background:var(--accent);border:none;padding:10px 14px;border-radius:8px;color:#08111a;cursor:pointer}
button.secondary{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--text)}
.hint{margin-top:10px;color:var(--muted);font-size:0.95rem}
.accelerator-list{margin-top:14px;padding:12px;border-radius:10px;background:rgba(245,158,11,0.08);color:var(--text)}
.accelerator-list ul{margin:10px 0 0 18px;padding:0}
.accelerator-list li{margin-bottom:8px}
.accelerator-list a{color:#ffde7d;text-decoration:underline}
.result{margin-top:16px;padding:12px;border-radius:8px;background:rgba(255,255,255,0.01);color:var(--muted)}
.hidden{display:none}
.donation-box{display:flex;gap:10px;align-items:center}
code{background:rgba(255,255,255,0.03);padding:8px;border-radius:6px}
footer{text-align:center;margin-top:18px;color:var(--muted)}

@media (max-width:600px){main{padding:14px}}