:root{
    --bg:#0f1724;--card:#0b1220;--accent:#7dd3fc;--muted:#94a3b8;--glass: rgba(255,255,255,0.04);
  }
  html,body{height:100%;margin:0;font-family:Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;color: #4e5259; background:#e9eeff;}
  .app{display:grid;grid-template-columns: 1fr 340px;gap:20px;max-width:1200px;margin:28px auto;padding:20px;align-items:start}
  header{grid-column:1/-1;display:flex;gap:12px;align-items:center}
  h1{margin:0;font-size:20px}
  p.lead{margin:0;color:#33517b;font-size:13px}

  .canvas{background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent);padding:18px;border-radius:14px;box-shadow:0px 0px 4px 0px rgba(2, 2, 8);display:flex;gap:20px;align-items:center;justify-content:center;position:relative}
  .wheel-wrap{width:100%;max-width:700px;aspect-ratio:1/1;position:relative}
  svg{width:100%;height:100%;display:block}
  .center-card{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:35%;height:35%;border-radius:50%;background:#ebecff;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 8px 30px rgba(2,6,23,0.6);backdrop-filter: blur(4px);text-align:center;padding:10px;transition: all 0.3s ease;}
  .center-card h2{margin:6px 0 2px;font-size:clamp(12px,1.6vw,18px)}
  .center-card p{margin:2px 0;padding:0 8px;color:#60497c;font-size:clamp(11px,1.2vw,14px)}
  .legend{position:absolute;right:12px;bottom:12px;background:var(--glass);padding:6px 8px;border-radius:8px;font-size:12px;color:var(--muted)}

  .sidebar{background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent);padding:16px;border-radius:12px;min-height:450px}
  .sidebar h3{margin:0 0 8px}
  label{display:block;font-size:13px;color: black;margin-top:10px;font-weight: 600;}
  input, textarea{font-weight:600; width:100%;height: max-content; padding:8px;border-radius:8px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:inherit;font-size:16px}
  .btn{display:inline-block;padding:8px 12px;border-radius:8px;background:var(--accent);color:#022032;border:none;cursor:pointer;margin-top:10px;transition:0.3s}
  .btn:hover{opacity:0.85}
  .virt-list{display: none; max-height:180px;overflow:auto;margin-top:10px;border-top:1px dashed rgba(255,255,255,0.03);padding-top:8px}
  .virt-item{display:flex;align-items:center;justify-content:space-between;padding:6px 0;border-bottom:1px solid rgba(255,255,255,0.02);transition:0.3s}
  .virt-item:hover{background:rgba(125,211,252,0.1);border-radius:6px}
  .muted{color:var(--muted);font-size:13px}
  .slice-label{font-size:clamp(19px,1vw,11px);fill:#fff;font-weight:600;pointer-events:none}
  footer{grid-column:1/-1;color:var(--muted);font-size:12px;margin-top:6px}

  @media (max-width:980px){.app{grid-template-columns:1fr;padding:12px} .canvas{order:1} .sidebar{order:2} .center-card{width:45%;height:45%;}}