:root{
      --bg0:#0b0f14;
      --bg1:#0f1722;
      --panel:#0f172a88;
      --panel2:#0b1220cc;
      --stroke:#94a3b8;
      --muted:#94a3b8cc;
      --text:#e5e7eb;
      --accent:#22c55e;
      --accent2:#60a5fa;
      --warn:#f59e0b;
      --danger:#ef4444;
      --shadow: 0 18px 50px rgba(0,0,0,.45);
      --radius: 18px;
      --radius2: 14px;
    }
    *{box-sizing:border-box}
    html,body{height:100%}
    body{
      margin:0;
      font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
      color:var(--text);
      background: radial-gradient(1200px 800px at 25% 20%, #1b2a3a55, transparent 60%),
                  radial-gradient(900px 700px at 80% 30%, #0ea5e933, transparent 55%),
                  linear-gradient(180deg, var(--bg0), var(--bg1));
      overflow:hidden;
    }
    .app{
      height:100%;
      display:grid;
      grid-template-rows: 64px 1fr;
    }
    header{
      display:flex;
      align-items:center;
      gap:14px;
      padding: 14px 18px;
      border-bottom: 1px solid rgba(148,163,184,.12);
      background: linear-gradient(180deg, rgba(15,23,42,.55), rgba(15,23,42,.25));
      backdrop-filter: blur(10px);
    }
    .brand{
      display:flex; align-items:center; gap:12px; min-width: 280px;
    }
    .logo{
      width:34px;height:34px;border-radius:10px;
      background:
        radial-gradient(12px 12px at 30% 30%, rgba(34,197,94,.45), transparent 60%),
        radial-gradient(14px 14px at 70% 70%, rgba(96,165,250,.42), transparent 60%),
        linear-gradient(135deg, rgba(255,255,255,.10), rgba(255,255,255,.03));
      border:1px solid rgba(148,163,184,.22);
      box-shadow: var(--shadow);
    }
    .brand h1{
      font-size: 14px;
      margin:0;
      letter-spacing:.3px;
      font-weight: 750;
      line-height:1.1;
    }
    .brand p{
      margin:0;
      font-size:12px;
      color:var(--muted);
      line-height:1.2;
    }
    .spacer{flex:1}
    .chip{
      display:flex; align-items:center; gap:10px;
      padding: 8px 10px;
      border-radius: 999px;
      border:1px solid rgba(148,163,184,.18);
      background: rgba(2,6,23,.35);
    }
    .chip label{
      font-size:12px;
      color:var(--muted);
      user-select:none;
    }
    select, button, input[type="range"]{
      font: inherit;
    }
    select{
      background: rgba(15,23,42,.55);
      color: var(--text);
      border: 1px solid rgba(148,163,184,.22);
      padding: 7px 10px;
      border-radius: 10px;
      outline:none;
    }
    select:focus{border-color: rgba(96,165,250,.65)}
    button{
      background: rgba(15,23,42,.55);
      color: var(--text);
      border: 1px solid rgba(148,163,184,.22);
      padding: 8px 12px;
      border-radius: 12px;
      cursor:pointer;
      transition: transform .08s ease, border-color .15s ease, background .15s ease;
      user-select:none;
    }
    button:hover{border-color: rgba(96,165,250,.55)}
    button:active{transform: translateY(1px)}
    .btnAccent{
      border-color: rgba(34,197,94,.55);
      background: rgba(34,197,94,.12);
    }
    .btnAccent:hover{border-color: rgba(34,197,94,.85)}
    .btnGhost{
      background: rgba(2,6,23,.18);
    }
    .main{
      display:grid;
      grid-template-columns: 25% 1fr 20%;
      gap: 14px;
      padding: 14px;
      height: calc(100vh - 64px);
    }
    .card{
      border-radius: var(--radius);
      background: rgba(2,6,23,.22);
      border: 1px solid rgba(148,163,184,.14);
      box-shadow: var(--shadow);
      overflow:hidden;
      min-height: 0;
    }
    .viewer{
      display:grid;
      grid-template-rows: auto 1fr;
    }
    .viewerTop{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      align-items:center;
      padding: 12px;
      background: linear-gradient(180deg, rgba(2,6,23,.45), rgba(2,6,23,.15));
      border-bottom: 1px solid rgba(148,163,184,.12);
      backdrop-filter: blur(10px);
    }
    .viewerTop .mini{
      display:flex; align-items:center; gap:8px;
      padding: 8px 10px;
      border-radius: 14px;
      border: 1px solid rgba(148,163,184,.14);
      background: rgba(15,23,42,.28);
    }
    .viewerTop .mini b{font-size:12px}
    .viewerTop .mini span{font-size:12px;color:var(--muted)}
    canvas{
      width:100%;
      height:100%;
      display:block;
      background: radial-gradient(900px 700px at 40% 35%, rgba(96,165,250,.12), transparent 60%),
                  radial-gradient(900px 700px at 70% 65%, rgba(34,197,94,.10), transparent 60%),
                  linear-gradient(180deg, rgba(2,6,23,.25), rgba(2,6,23,.5));
    }
    .sidebar{
      display:grid;
      grid-template-rows: auto auto 1fr auto;
    }
        .sidebarLeft{
      grid-template-rows: auto 1fr auto;
    }
    .sidebarRight{
      grid-template-rows: auto 1fr;
    }
    .sidebarRight .controls{
      border-bottom: none;
      overflow:auto;
      min-height: 0;
    }
.sideTop{
      padding: 14px;
      background: linear-gradient(180deg, rgba(2,6,23,.55), rgba(2,6,23,.15));
      border-bottom: 1px solid rgba(148,163,184,.12);
    }
    .sideTop h2{
      margin:0 0 6px 0;
      font-size: 14px;
      letter-spacing:.2px;
    }
    .sideTop p{
      margin:0;
      font-size: 12.5px;
      color: var(--muted);
      line-height: 1.45;
    }
    .controls{
      padding: 12px 14px 10px;
      border-bottom: 1px solid rgba(148,163,184,.12);
      display:grid;
      gap:10px;
    }
    .row{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:10px;
    }
    .field{
      border: 1px solid rgba(148,163,184,.14);
      background: rgba(15,23,42,.22);
      border-radius: 14px;
      padding: 10px 10px 8px;
    }
    .field .label{
      display:flex; align-items:baseline; justify-content:space-between;
      gap:10px;
      margin-bottom: 6px;
    }
    .field .label b{font-size:12px}
    .field .label em{
      font-style: normal;
      font-size: 12px;
      color: var(--muted);
    }
    input[type="range"]{
      width:100%;
      accent-color: var(--accent2);
    }
    .toggles{
      display:flex; flex-wrap:wrap; gap:10px;
    }
    .toggle{
      display:flex; align-items:center; gap:8px;
      padding: 8px 10px;
      border-radius: 999px;
      border: 1px solid rgba(148,163,184,.14);
      background: rgba(15,23,42,.22);
      user-select:none;
      cursor:pointer;
    }
    .toggle input{transform: translateY(1px)}
    .content{
      padding: 12px 14px;
      overflow:auto;
    }
    .stepTitle{
      font-size: 15px;
      margin: 0 0 10px;
      font-weight: 800;
      letter-spacing:.2px;
    }
    .content p{
      margin: 0 0 10px;
      color: rgba(229,231,235,.92);
      line-height: 1.55;
      font-size: 13.2px;
    }
    .callout{
      border-radius: 14px;
      padding: 12px;
      border: 1px solid rgba(96,165,250,.25);
      background: rgba(96,165,250,.09);
      margin: 10px 0 12px;
    }
    .callout b{display:block; margin-bottom:6px; font-size:12px}
    .callout span{color: rgba(229,231,235,.92); font-size: 12.8px; line-height:1.5; display:block}
    .footerNav{
      padding: 12px 14px;
      border-top: 1px solid rgba(148,163,184,.12);
      display:flex;
      align-items:center;
      gap:10px;
      background: linear-gradient(180deg, rgba(2,6,23,.10), rgba(2,6,23,.40));
    }
    .progress{
      flex:1;
      height: 8px;
      border-radius: 999px;
      background: rgba(148,163,184,.14);
      overflow:hidden;
      border: 1px solid rgba(148,163,184,.10);
    }
    .bar{
      height:100%;
      width:40%;
      background: linear-gradient(90deg, rgba(34,197,94,.85), rgba(96,165,250,.85));
      border-radius: 999px;
    }
    .hint{
      font-size: 12px;
      color: var(--muted);
      user-select:none;
    }

    
    @media (max-width: 980px){
      body{overflow:auto}
      .app{height:auto; min-height:100%}
      .main{
        height:auto;
        grid-template-columns: 1fr;
      }
      .viewer{height: 60vh}
    }