body {
      margin: 0;
      font-family: system-ui;
      background: #f5f7fb;
      color: #1e293b;
      line-height: 1.6
    }

    .page-title {
      background: linear-gradient(135deg, #065f46, #047857);
      color: #fff;
      padding: 25px;
      text-align: center
    }

    .container {
      max-width: 900px;
      margin: auto;
      padding: 20px
    }

    .card {
      background: #fff;
      padding: 20px;
      border-radius: 14px;
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
      margin-bottom: 20px
    }

    h1,
    h2 {
      margin-top: 0
    }

    .highlight {
      background: #dcfce7;
      padding: 12px;
      border-left: 5px solid #16a34a;
      border-radius: 6px
    }

    .ad {
      background: #e5e7eb;
      padding: 25px;
      text-align: center;
      border-radius: 10px;
      margin: 20px 0
    }

    footer {
      background: #0f172a;
      color: #fff;
      text-align: center;
      padding: 20px
    }