div#container
{
   width: 1000px;
   position: relative;
   margin: 0 auto 0 auto;
   text-align: left;
}
body
{
   background-color: #FFFFFF;
   color: #000000;
   font-family: Arial;
   font-weight: normal;
   font-size: 16px;
   line-height: 1.1875;
   margin: 0;
   text-align: center;
}
        :root {
            --primary-color: #2a6b5d;
            --secondary-color: #6da89c;
            --accent-color: #d4e8e3;
            --text-color: #333;
            --light-text: #666;
            --background: #2a6b5d;
            --dark-green: #1a4b3f;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: var(--background);
            color: var(--text-color);
            line-height: 1.6;
        }
        
        header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 3rem 0;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            position: relative;
            overflow: hidden;
        }
        
        header::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="100" height="100" opacity="0.05"><circle cx="50" cy="50" r="40" stroke="white" stroke-width="2" fill="none" /><path d="M50,10 A40,40 0 1,1 50,90 A40,40 0 1,1 50,10 Z" fill="none" stroke="white" stroke-width="1"/></svg>');
            background-repeat: repeat;
            opacity: 0.1;
        }
        
        nav {
            background-color: var(--primary-color);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        
        nav ul {
            display: flex;
            justify-content: center;
            list-style: none;
            flex-wrap: wrap;
        }
        
        nav ul li {
            margin: 0 1.5rem;
        }
        
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
        }
        
        nav ul li a i {
            margin-right: 0.5rem;
        }
        
        nav ul li a:hover {
            color: var(--accent-color);
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }
        
        section {
            margin-bottom: 4rem;
            padding: 2.5rem;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease;
        }
        
        section:hover {
            transform: translateY(-5px);
        }
        
        h1, h2, h3 {
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        h1 {
            font-size: 2.8rem;
            margin-bottom: 0.5rem;
        }
        
        h2 {
            font-size: 2rem;
            border-bottom: 2px solid var(--accent-color);
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
        }
        
        h2 i {
            margin-right: 0.8rem;
        }
        
        h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin-top: 1.5rem;
            display: flex;
            align-items: center;
        }
        
        h3 i {
            margin-right: 0.8rem;
        }
        
        p {
            margin-bottom: 1rem;
        }
        
        .intro {
            text-align: center;
            margin-bottom: 3rem;
        }
        
        .card-container {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin-top: 2rem;
        }
        
        .card {
            flex: 1 1 300px;
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }
        
        .card:hover {
            transform: translateY(-5px);
        }
        
        .card-img {
            height: 200px;
            background-color: var(--secondary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
        }
        
        .card-content {
            padding: 1.5rem;
        }
        
        .card h3 {
            color: var(--primary-color);
            margin-top: 0;
        }
        
        .example-box {
            background-color: var(--accent-color);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            border-left: 4px solid var(--primary-color);
        }
        
        .example-box h4 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
        }
        
        .example-box h4 i {
            margin-right: 0.5rem;
        }
        
        .technique-list {
            list-style-type: none;
        }
        
        .technique-list li {
            margin-bottom: 1rem;
            padding-left: 1.5rem;
            position: relative;
        }
        
        .technique-list li:before {
            content: "•";
            color: var(--primary-color);
            font-weight: bold;
            position: absolute;
            left: 0;
        }
        
        .pendulum-types {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 2rem;
        }
        
        .pendulum-type {
            flex: 1 1 250px;
            background-color: var(--accent-color);
            padding: 1.5rem;
            border-radius: 8px;
        }
        
        .pendulum-type h4 {
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        
        .application-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        
        .application-item {
            background-color: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }
        
        .application-item:hover {
            transform: translateY(-5px);
        }
        
        .application-item h4 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
        }
        
        .application-item h4 i {
            margin-right: 0.5rem;
        }
        
        footer {
            background-color: var(--dark-green);
            color: white;
            text-align: center;
            padding: 2rem 0;
            margin-top: 3rem;
        }
        
        @media (max-width: 768px) {
            nav ul {
                flex-direction: column;
                align-items: center;
            }
            
            nav ul li {
                margin: 0.5rem 0;
            }
            
            .card-container {
                flex-direction: column;
            }
            
            .application-grid {
                grid-template-columns: 1fr;
            }
        }