:root{
    --bg: #05060a;
    --surface: #0c1018;
    --line: #1c2331;
    --text: #eef0f6;
    --muted: #838ba0;
    --accent: #3ee6c4;
    --accent-2: #5b8cff;
    --amber: #ffb454;
  }
  *{ box-sizing: border-box; }
  body{
    margin:0; min-height:100vh;
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    display:flex; align-items:center; justify-content:center;
    padding: 24px;
    position: relative;
    overflow: hidden;
  }
  .grid-bg{
    position:fixed; inset:0;
    background-image:
      linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 36px 36px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 85%);
  }
  .glow{
    position:fixed; width:520px; height:520px;
    background: radial-gradient(circle, rgba(255,180,84,0.10), transparent 65%);
    top:-160px; left:50%; transform:translateX(-50%);
  }
  .card{
    position: relative; z-index: 2;
    width: 100%; max-width: 400px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 30px 60px -30px rgba(0,0,0,0.7);
  }
  .card-bar{
    display:flex; align-items:center; gap:8px;
    padding: 12px 14px;
    border-bottom: 1px solid var(--line);
    font-family:'JetBrains Mono', monospace;
    font-size: 11.5px; color: var(--muted);
  }
  .card-bar span.dot{ width:9px; height:9px; border-radius:50%; }
  .card-body{
    padding: 40px 28px 32px;
    text-align:center;
  }
  .icon-wrap{
    width: 68px; height:68px; margin: 0 auto 22px;
    border-radius: 50%;
    background: rgba(255,180,84,0.09);
    border: 1px solid rgba(255,180,84,0.25);
    display:flex; align-items:center; justify-content:center;
    font-size: 26px; color: var(--amber);
  }
  h1{
    font-size: 18px; margin: 0 0 10px;
    font-weight: 700;
  }
  p{
    font-size: 13.5px; color: var(--muted);
    line-height: 1.75; margin: 0 0 26px;
  }
  p b{ color: var(--text); }
  .back-btn{
    display:inline-flex; align-items:center; gap:8px;
    padding: 11px 20px;
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    color: #04070c; font-weight:700; font-size: 13px;
    border-radius: 10px; text-decoration:none;
  }
  .code-line{
    margin-top: 24px;
    font-family:'JetBrains Mono', monospace;
    font-size: 11px; color: #4a5062;
  }