body {
      margin: 0;
      font-family: Arial, sans-serif;
      background: #0d1117;
      color: #ffffff;
    }

    /* NAVBAR */
    nav {
      background: #161b22;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 40px;
    }

    nav .logo {
      font-size: 20px;
      font-weight: bold;
    }

    nav ul {
      list-style: none;
      display: flex;
      gap: 20px;
      margin: 0;
      padding: 0;
    }

    nav ul li a {
      color: #ffffff;
      text-decoration: none;
      font-size: 14px;
    }

    nav ul li a:hover {
      color: #1f6feb;
    }


    /* HERO */
    .hero {
      text-align: center;
      padding: 100px 20px;
      background:
        linear-gradient(rgba(13,17,23,0.8), rgba(13,17,23,0.9)),
        url('https://images.unsplash.com/photo-1558494949-ef010cbdcc31?auto=format&fit=crop&w=1600&q=80');
      background-size: cover;
      background-position: center;
    }

    .hero h1 {
      font-size: 44px;
      margin-bottom: 10px;
    }

    .hero p {
      font-size: 18px;
      margin-bottom: 30px;
      color: #c9d1d9;
    }

    .btn {
      background: #1f6feb;
      padding: 12px 25px;
      color: white;
      text-decoration: none;
      border-radius: 5px;
      font-weight: bold;
    }


    /* PRICING */
    .pricing {
      display: flex;
      justify-content: center;
      gap: 20px;
      padding: 60px 20px;
      flex-wrap: wrap;
    }

    .plan {
      background: #161b22;
      padding: 25px;
      border-radius: 10px;
      width: 260px;
      text-align: center;
      box-shadow: 0 0 15px rgba(0,0,0,0.5);
    }

    .plan h2 {
      margin-bottom: 10px;
    }

    .price {
      font-size: 30px;
      margin: 15px 0;
      color: #58a6ff;
    }

    .features {
      list-style: none;
      padding: 0;
      margin: 20px 0;
    }

    .features li {
      margin: 10px 0;
      color: #c9d1d9;
    }

    /* FOOTER */
    .footer {
      background: #161b22;
      padding: 40px 20px;
      margin-top: 40px;
    }

    .footer-container {
      max-width: 1100px;
      margin: auto;
      display: flex;
      flex-wrap: wrap;
      gap: 40px;
      justify-content: space-between;
    }

    .footer-col {
      flex: 1;
      min-width: 220px;
    }

    .footer h3 {
      margin-bottom: 15px;
      font-size: 16px;
    }

    .footer p {
      color: #8b949e;
      font-size: 14px;
      line-height: 1.6;
    }

    .footer ul {
      list-style: none;
      padding: 0;
    }

    .footer ul li {
      margin-bottom: 10px;
    }

    .footer ul li a {
      text-decoration: none;
      color: #c9d1d9;
      font-size: 14px;
    }

    .footer ul li a:hover {
      color: #58a6ff;
    }

    .footer-bottom {
      text-align: center;
      margin-top: 30px;
      padding-top: 20px;
      border-top: 1px solid #30363d;
      color: #8b949e;
      font-size: 13px;
    }

.section h3 {
    color: #2a6df4;
    margin-bottom: 15px;
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 50px 20px;
}

.card {
    background: #161B22;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}


<!-- sub menu -->

.menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    background: #1e3a5f;
}

.menu li {
    position: relative;
}

.menu a {
    display: block;
    padding: 15px 20px;
    color: white;
    text-decoration: none;
}


/* Submenu */
.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    list-style: none;
    padding: 0;
    margin: 0;
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
}

.submenu li a {
    color: #333;
    padding: 12px 15px;
}

.submenu li a:hover {
    background: #f5f7fa;
}

/* Show submenu on hover */
.has-submenu:hover .submenu {
    display: block;
}

<!-- end sub menu -->

.features {
      list-style: none;
      padding: 0;
      margin: 20px 0;
}

    .features li {
      margin: 10px 0;
      color: #c9d1d9;
    }