:root {
           --primary-color: #4a6fa5;
           --secondary-color: #166088;
           --light-bg: #f8f9fa;
           --dark-text: #333;
           --light-text: #f8f9fa;
           --dark-bg: #1a1a1a;
           --dark-card: #2d2d2d;
       }

       * {
           box-sizing: border-box;
           margin: 0;
           padding: 0;
           font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
       }

       body {
           background-color: var(--light-bg);
           color: var(--dark-text);
           line-height: 1.6;
           min-height: 100vh;
           display: flex;
           flex-direction: column;
       }

       header {
           background-color: var(--primary-color);
           color: white;
           padding: 1.5rem;
           text-align: center;
           box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
       }

       .container {
           max-width: 1000px;
           margin: 2rem auto;
           padding: 0 1.5rem;
           flex: 1;
       }

       .hero {
           text-align: center;
           padding: 2rem 1rem;
           margin-bottom: 2rem;
       }

       .hero h1 {
           font-size: 2.2rem;
           margin-bottom: 1rem;
           color: var(--primary-color);
       }

       .hero p {
           font-size: 1.2rem;
           max-width: 800px;
           margin: 0 auto;
       }

       .card {
           background: white;
           border-radius: 10px;
           box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
           padding: 2rem;
           margin-bottom: 2rem;
       }

       h2 {
           color: var(--primary-color);
           margin-bottom: 1.5rem;
           font-size: 1.8rem;
           border-bottom: 2px solid var(--primary-color);
           padding-bottom: 0.5rem;
       }

       h3 {
           color: var(--secondary-color);
           margin: 1.5rem 0 1rem;
           font-size: 1.4rem;
       }

       p {
           margin-bottom: 1rem;
           font-size: 1.1rem;
           line-height: 1.8;
       }

       ul,
       ol {
           padding-right: 1.5rem;
           margin-bottom: 1.5rem;
       }

       li {
           margin-bottom: 0.8rem;
           font-size: 1.1rem;
       }

       .feature-box {
           display: flex;
           align-items: center;
           background: #f0f8ff;
           border-radius: 8px;
           padding: 1.5rem;
           margin: 1.5rem 0;
       }

       .feature-icon {
           font-size: 2.5rem;
           margin-left: 1.5rem;
           color: var(--primary-color);
       }

       .feature-text {
           flex: 1;
       }

       .privacy-alert {
           background-color: #fff3e0;
           border-right: 5px solid #ff6b35;
           padding: 1.5rem;
           border-radius: 8px;
           margin: 2rem 0;
       }

       .privacy-alert h3 {
           color: #ff6b35;
       }

       .steps {
           counter-reset: step-counter;
       }

       .step {
           position: relative;
           padding-right: 3rem;
           margin-bottom: 2rem;
       }

       .step:before {
           counter-increment: step-counter;
           content: counter(step-counter);
           position: absolute;
           right: 0;
           top: 0;
           width: 2.5rem;
           height: 2.5rem;
           background-color: var(--primary-color);
           color: white;
           border-radius: 50%;
           display: flex;
           align-items: center;
           justify-content: center;
           font-weight: bold;
       }

       .screenshot {
           max-width: 100%;
           height: auto;
           border: 1px solid #ddd;
           border-radius: 8px;
           margin: 1.5rem 0;
           box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
       }

       footer {
           text-align: center;
           padding: 1.5rem;
           background-color: var(--primary-color);
           color: white;
           margin-top: auto;
       }

       @media (max-width: 768px) {
           .hero h1 {
               font-size: 1.8rem;
           }

           .hero p {
               font-size: 1rem;
           }

           .card {
               padding: 1.5rem;
           }

           .feature-box {
               flex-direction: column;
               text-align: center;
           }

           .feature-icon {
               margin: 0 0 1rem 0;
           }
       }

       nav {
           display: flex;
           justify-content: space-between;
           align-items: center;
           flex-wrap: wrap;
       }

       nav ul {
           display: flex;
           list-style: none;
           flex-wrap: wrap;
           justify-content: center;
       }

       nav ul li {
           margin: 0.5rem;
       }

       nav a {
           color: white;
           text-decoration: none;
           font-weight: 500;
           padding: 0.5rem;
           border-radius: 4px;
           transition: background-color 0.3s;
       }

       nav a:hover {
           background-color: rgba(255, 255, 255, 0.2);
       }