:root {
            --primary-color: #ff6b35;
            --secondary-color: #1a1a2e;
            --accent-color: #ffd166;
            --text-light: #f8f9fa;
            --text-dark: #212529;
            --gradient-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #f8f9fa;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .hero-section {
            background: var(--gradient-bg);
            color: var(--text-light);
            padding: 4rem 0;
            margin-bottom: 2rem;
            border-bottom: 5px solid var(--primary-color);
        }
        .section-title {
            color: var(--primary-color);
            border-bottom: 2px solid var(--accent-color);
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        .content-card {
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            padding: 2rem;
            margin-bottom: 2rem;
            transition: transform 0.3s ease;
        }
        .content-card:hover {
            transform: translateY(-5px);
        }
        .highlight-text {
            background: linear-gradient(120deg, var(--accent-color) 0%, var(--accent-color) 100%);
            background-repeat: no-repeat;
            background-size: 100% 0.3em;
            background-position: 0 88%;
            font-weight: 700;
        }
        .feature-icon {
            color: var(--primary-color);
            font-size: 1.5rem;
            margin-right: 0.5rem;
        }
        .img-container {
            border-radius: 10px;
            overflow: hidden;
            margin: 1.5rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .img-container img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .img-container:hover img {
            transform: scale(1.03);
        }
        .table-of-contents {
            background: var(--secondary-color);
            color: var(--text-light);
            border-radius: 10px;
            padding: 1.5rem;
            margin-bottom: 2rem;
        }
        .table-of-contents ul {
            list-style-type: none;
            padding-left: 0;
        }
        .table-of-contents li {
            margin-bottom: 0.7rem;
            padding-left: 1rem;
            border-left: 3px solid var(--primary-color);
        }
        .table-of-contents a {
            color: var(--text-light);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .table-of-contents a:hover {
            color: var(--accent-color);
        }
        footer {
            background: var(--secondary-color);
            color: var(--text-light);
            padding: 2rem 0;
            margin-top: 3rem;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 2rem 0;
            }
            .content-card {
                padding: 1.5rem;
            }
        }