body{
    background:
      radial-gradient(1100px 620px at 82% -8%, rgba(59,123,255,.14), transparent 60%),
      linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 46%, var(--navy-950) 100%);
    min-height:100vh;
    font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
    color:var(--ink-0);
    display:flex; align-items:center; justify-content:center;
    /*padding:40px 16px;*/
     overflow: hidden;
  }

  .stage{ width:100%; max-width:412px; }
 .frame{
    position:relative;
    background:linear-gradient(180deg, var(--navy-800) 0%, var(--navy-900) 100%);
    border:1px solid var(--line);
    /*border-radius:28px;*/
    box-shadow:0 40px 80px -30px rgba(0,0,0,.7), 0 0 0 1px rgba(255,255,255,.02) inset;
    overflow:hidden;
    display:flex; flex-direction:column;
    height: 100vh;
    min-height: 100dvh;
    
  }
  .topbar{ flex:none; display:flex; align-items:center; justify-content:space-between; padding:16px 18px 12px; }
  .topbar-left{ display:flex; align-items:center; gap:10px; }
  .icon-btn{ width:32px; height:32px; border-radius:10px; background:var(--surface); border:1px solid var(--line); display:flex; align-items:center; justify-content:center; color:var(--ink-1); cursor:pointer; flex:none; }
  .icon-btn svg{ width:15px; height:15px; }
  .topbar-title{ font-size:16px; font-weight:800; }
 .scroll{
    flex:1; overflow-y:scroll; padding:2px 18px 18px;
    scrollbar-width:none;
  }
  .scroll::-webkit-scrollbar{ display:none; }

  .brand-header{ display:flex; align-items:center; gap:12px; margin:6px 0 4px; }
  .brand-ico{ width:44px; height:44px; border-radius:13px; flex:none; display:flex; align-items:center; justify-content:center; background:rgba(240,185,11,.16); color:#f0b90b; }
  .brand-ico svg{ width:22px; height:22px; }
  .brand-header h1{ font-size:15px; font-weight:800; margin:0 0 3px; }
  .brand-header p{ font-size:11px; color:var(--ink-1); margin:0; line-height:1.5; }

  .steps{ display:flex; flex-direction:column; margin:20px 0 18px; }
  .step{ display:flex; gap:12px; }
  .step-rail{ display:flex; flex-direction:column; align-items:center; flex:none; }
  .step-num{ width:28px; height:28px; border-radius:100px; flex:none; background:rgba(59,123,255,.14); border:1.5px solid rgba(59,123,255,.4); color:var(--blue-400); display:flex; align-items:center; justify-content:center; font-size:11.5px; font-weight:800; }
  .step-num.critical{ background:rgba(232,184,75,.16); border-color:rgba(232,184,75,.5); color:var(--gold); }
  .step-vline{ width:2px; flex:1; background:var(--line-strong); margin:2px 0; min-height:20px; }
  .step-body{ padding-bottom:20px; flex:1; }
  .step-body b{ display:block; font-size:12.5px; font-weight:700; margin-bottom:3px; }
  .step-body p{ font-size:11px; color:var(--ink-1); margin:0 0 8px; line-height:1.5; }

  .ip-box{ display:flex; align-items:center; justify-content:space-between; gap:8px; background:rgba(255,255,255,.03); border:1px solid var(--line); border-radius:11px; padding:9px 11px; margin-top:6px; }
  .ip-box span{ font-size:10px; color:var(--blue-400); font-family:'IBM Plex Mono',monospace; line-height:1.6; }
  .ip-box svg{ width:14px; height:14px; color:var(--ink-1); flex:none; cursor:pointer; }

  .perm-check{ display:flex; align-items:center; gap:7px; font-size:11px; color:var(--ink-1); margin-top:5px; }
  .perm-check svg{ width:13px; height:13px; color:var(--green); flex:none; }

  .cta{ width:100%; border:0; border-radius:13px; padding:14px 18px; background:linear-gradient(135deg, var(--blue-500), var(--blue-600)); color:#fff; font-size:12px; font-weight:700; font-family:inherit; display:flex; align-items:center; justify-content:center; gap:8px; cursor:pointer; box-shadow:0 14px 28px -12px rgba(43,95,224,.65); }
  .cta svg{ width:16px; height:16px; }

  .note{ display:flex; align-items:center; justify-content:center; gap:6px; margin-top:14px; font-size:10.5px; color:var(--ink-2); text-align:center; }
  .note svg{ width:12px; height:12px; color:var(--green); flex:none; }

  .toast{
    position:absolute; left:50%; bottom:22px; transform:translateX(-50%) translateY(12px);
    background:var(--navy-700); border:1px solid var(--line-strong); color:var(--ink-0);
    font-size:12px; font-weight:600; padding:10px 16px; border-radius:100px;
    box-shadow:0 16px 32px -12px rgba(0,0,0,.6); opacity:0; visibility:hidden;
    transition:opacity .2s ease, transform .2s ease, visibility .2s; z-index:60; white-space:nowrap;
    display:flex; align-items:center; gap:7px;
  }
  .toast.show{ opacity:1; visibility:visible; transform:translateX(-50%) translateY(0); }
  .toast svg{ width:13px; height:13px; color:var(--blue-400); flex:none; }
  
  /* ---------- bottom nav ---------- */
  .bottom-nav{
    flex:none; display:flex; align-items:center; justify-content:space-around;
    padding:10px 8px 14px; border-top:1px solid var(--line);
    background:rgba(10,18,38,.9); backdrop-filter:blur(6px);
  }
  .nav-item{ display:flex; flex-direction:column; align-items:center; gap:4px; color:var(--ink-2); }
  .nav-item svg{ width:19px; height:19px; }
  .nav-item span{ font-size:9.5px; font-weight:600; }
  .nav-item.active{ color:var(--blue-400); }