* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: "Segoe UI", sans-serif;
    }

    body {
      height: 100vh;
      background: linear-gradient(135deg, #0f2027, #203a43, #1b5e20);
      display: flex;
      justify-content: center;
      align-items: center;
      color: white;
    }
    .card {
      background: rgba(255, 255, 255, 0.07);
      backdrop-filter: blur(18px);
      padding: 70px 90px;
      border-radius: 25px;
      text-align: center;
      box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.1);
      max-width: 600px;
      width: 90%;
    }

    /* Logo */
    .logo {
      display: flex;
      justify-content: center;
      align-items: center;
      margin-bottom: 25px;
    }

    .logo-icon {
      width: 45px;
      height: 45px;
      border-radius: 12px;
      background: linear-gradient(45deg, #00c853, #69f0ae);
      display: flex;
      justify-content: center;
      align-items: center;
      font-weight: bold;
      font-size: 22px;
      color: #0f172a;
      margin-right: 12px;
      box-shadow: 0 10px 20px rgba(0, 200, 83, 0.4);
    }

    .logo-text {
      font-size: 26px;
      font-weight: 600;
      letter-spacing: 1px;
    }

    h1 {
      font-size: 44px;
      margin-bottom: 20px;
    }

    p {
      font-size: 18px;
      margin-bottom: 40px;
      opacity: 0.85;
    }

    .start-btn {
      padding: 15px 55px;
      font-size: 18px;
      border: none;
      border-radius: 50px;
      cursor: pointer;
      font-weight: bold;
      background: linear-gradient(90deg, #00c853, #69f0ae);
      color: #0f172a;
      transition: all 0.3s ease;
    }

    .start-btn:hover {
      transform: translateY(-4px);
      box-shadow: 0 15px 35px rgba(0, 200, 83, 0.5);
    }

    .start-btn:active {
      transform: scale(0.97);
    }

    @media (max-width: 600px) {
      .card {
        padding: 40px 30px;
      }

      h1 {
        font-size: 30px;
      }

      p {
        font-size: 16px;
      }
    }