* {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      font-family: Arial, sans-serif;
      background: #0f172a;
      color: white;
      text-align: center;
      padding: 20px;
    }

    .container {
      width: 100%;
      max-width: 600px;
    }

    h1 {
      font-size: clamp(2rem, 5vw, 3.2rem);
      margin: 0;
      line-height: 1.2;
    }

    p {
      margin-top: 12px;
      font-size: clamp(1rem, 2.5vw, 1.2rem);
      opacity: 0.75;
      line-height: 1.6;
    }

    .buttons {
      margin-top: 25px;
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    a {
      padding: 10px 18px;
      background: #1e293b;
      color: white;
      text-decoration: none;
      border-radius: 6px;
      transition: background 0.3s ease;
      font-size: 0.95rem;
      min-width: 150px;
    }

    a:hover {
      background: #334155;
    }

    /* 📱 Small phones */
    @media (max-width: 480px) {
      .buttons {
        flex-direction: column;
        gap: 10px;
      }

      a {
        width: 100%;
      }
    }

    @media (min-width: 481px) and (max-width: 1024px) {
      .container {
        max-width: 500px;
      }
    }

    @media (min-width: 1025px) {
      .container {
        max-width: 650px;
      }
    }