body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      margin: 0;
      padding: 0;
      background: #0f172a;
      color: #e5e7eb;
      display: flex;
      min-height: 100vh;
      align-items: center;
      justify-content: center;
    }

    .card {
      background: #020617;
      border-radius: 16px;
      padding: 2.5rem 3rem;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
      max-width: 480px;
      text-align: center;
    }

    h1 {
      margin-top: 0;
      font-size: 2.2rem;
      letter-spacing: 0.04em;
    }

    p {
      line-height: 1.6;
      color: #cbd5f5;
    }

    a.button {
      display: inline-block;
      margin-top: 1.5rem;
      padding: 0.75rem 1.5rem;
      border-radius: 999px;
      background: #22c55e;
      color: #022c22;
      text-decoration: none;
      font-weight: 600;
      letter-spacing: 0.03em;
      transition: transform 0.2s ease-out, box-shadow 0.2s ease, background 0.2s ease;
      box-shadow: 0 10px 25px rgba(34, 197, 94, 0.35);
      animation: glow 4s ease-in-out infinite;
      will-change: transform;
      position: relative;
    }

    a.button::before {
      content: "";
      position: absolute;
      inset: -6px;
      border-radius: inherit;
      background: rgba(34, 197, 94, 0.6);
      filter: blur(18px);
      opacity: 0.5;
      z-index: -1;
      animation: glow 4s ease-in-out infinite;
    }

    a.button:hover {
      transform: translateY(-3px) scale(1.1);
      background: #16a34a;
    }

    a.button:active {
      transform: translateY(0) scale(0.96);
      box-shadow: 0 6px 14px rgba(34, 197, 94, 0.3);
    }

    @keyframes glow {
      0% {
        opacity: 0.3;
      }
      50% {
        opacity: 0.8;
      }
      100% {
        opacity: 0.3;
      }
    }

    .tagline {
      font-size: 3rem;
      text-transform: uppercase;
      letter-spacing: 0.18em;
      color: #64748b;
      margin-bottom: 0.75rem;
    }