:root {
            --primary-color: #6366F1;
            --primary-light: #818CF8;
            --primary-footer-color: #7669E2;
            --secondary-footer-color: #D9D6F6;
            --secondary-color: #F1F5F9;
            --text-color: #1E293B;
            --text-light: #64748B;
            --background-color: #FFFFFF;
            --surface-color: #F8FAFC;
            --border-color: #E2E8F0;
        }

        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            margin: 0;
            padding: 0;
            background-color: var(--background-color);
            color: var(--text-color);
            line-height: 1.7;
        }
        .hamburger-button {
            display: none;
            position: fixed;
            top: 20px;
            left: 20px;
            z-index: 1000;
            background: var(--primary-color);
            border: none;
            border-radius: 5px;
            padding: 10px;
            cursor: pointer;
            width: 45px;
            height: 45px;
            align-items: center;
            justify-content: center;
        }

        .hamburger-icon {
            display: block;
            position: relative;
            width: 25px;
            height: 2px;
            background: white;
            transition: all 0.3s;
            margin: 0;

        }

        .hamburger-icon::before,
        .hamburger-icon::after {
            content: '';
            position: absolute;
            width: 25px;
            height: 2px;
            background: white;
            transition: all 0.3s;
            left: 0;
        }

        .hamburger-icon::before {
            transform: translateY(-8px);
        }

        .hamburger-icon::after {
            transform: translateY(8px);
        }

        .hamburger-button.active .hamburger-icon {
            background: transparent;
        }

        .hamburger-button.active .hamburger-icon::before {
            transform: rotate(45deg);
        }

        .hamburger-button.active .hamburger-icon::after {
            transform: rotate(-45deg);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
        }
        header {
            background:  var(--primary-color);
            color: white;
            padding: 3rem 1rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            border: none;
        }

        header::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 40px;
            background: var(--background-color);
            clip-path: polygon(0 100%, 100% 100%, 100% 0);
             border: none;
        }

        header h1 {
            margin: 0;
            font-size: 2.5rem;
            font-weight: 700;
            letter-spacing: -0.5px;
        }

        .container {
            max-width: 900px;
            margin: 0 auto;
            padding: 2rem 1.5rem;
        }
        .content-wrapper {
            display: flex;
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 1.5rem;
            gap: 2rem;
        }
        .sidebar a:hover {
            background: var(--primary-light);
            color: white;
            transform: scale(1.05);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .contact-item:hover {
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(99, 102, 241, 0.1);
            transition: all 0.3s ease;
        }
        .contact-details a:hover {
            color: var(--primary-light);
            text-decoration: underline;
        }

        a:hover {
            color: var(--primary-light);
            text-decoration: underline;
        }

        .sidebar h3:hover {
             color: var(--primary-light);
        }

        button:hover {
            background: var(--primary-light);
            color: white;
            transform: scale(1.05);
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
        }

        header:hover h1 {
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
            transition: text-shadow 0.3s ease;
        }

        .sidebar {
            flex: 0 0 250px;
            background: var(--surface-color);
            padding: 1.5rem;
            border-radius: 0.75rem;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 1rem;
            height: fit-content;
             transition: transform 0.3s ease-in-out;
             
        }

        .sidebar h3 {
            margin-top: 0;
            color: var(--primary-color);
        }

        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 1rem 0;
        }

        .sidebar li {
            margin-bottom: 0.5rem;
        }

        .sidebar a {
            display: block;
            padding: 0.5rem;
            color: var(--text-color);
            text-decoration: none;
            border-radius: 0.5rem;
            transition: background 0.2s, color 0.2s;
        }

        .sidebar a:hover {
            background: var(--primary-light);
            color: white;
        }

        .main-content {
            flex: 1;
        }
         .main-content .card {
            margin-bottom: 2rem;
        }

        .card {
            background: var(--surface-color);
            border-radius: 1rem;
            padding: 2rem;
            margin: 1.5rem 0;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
        }

        h2 {
            color: var(--primary-color);
            font-size: 1.75rem;
            margin: 2rem 0 1rem;
            font-weight: 600;
        }

        .section-intro {
            color: var(--text-light);
            font-size: 1.1rem;
            margin-bottom: 1.5rem;
        }

        ul {
            padding-left: 1.5rem;
            margin: 1.5rem 0;
        }

        li {
            margin-bottom: 1rem;
            position: relative;
        }

        li::before {
            content: '•';
            color: var(--primary-color);
            font-weight: bold;
            position: absolute;
            left: -1.2rem;
        }

        .highlight-box {
            background: var(--secondary-color);
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0.5rem;
        }

        .contact-grid {
            display: grid;
            gap: 1.5rem;
            margin: 2rem 0;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            padding: 1.5rem;
            background: white;
            border-radius: 1rem;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .contact-item h3 {
            margin: 0 0 0.5rem 0;
            color: var(--text-color);
            font-size: 1.1rem;
            font-weight: 600;
        }
        .contact-details a {
            color: var(--primary-color);
            text-decoration: none;
            font-size: 1.1rem;
            font-weight: 500;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.2s;
        }

        a:hover {
            color: var(--primary-light);
        }

        footer {
            background: var(--surface-color);
            border-top: 1px solid var(--border-color);
            padding: 2rem;
            text-align: center;
            color: var(--text-light);
            margin-top: 4rem;
        }

        .toc {
            background: var(--surface-color);
            padding: 1.5rem;
            border-radius: 0.75rem;
            margin: 2rem 0;
        }

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

        .toc li {
            margin-bottom: 0.5rem;
        }

        .toc li::before {
            content: none;
        }

        .toc a {
            display: block;
            padding: 0.5rem 0;
            color: var(--text-color);
            transition: all 0.2s;
        }

        .toc a:hover {
            color: var(--primary-color);
            padding-left: 0.5rem;
        }
        footer {
            background-color: var(--secondary-footer-color);
            color: var(--primary-footer-color);
            text-align: center;
            padding: 10px 20px;
            margin-top: 40px;
            border-top: 2px solid var(--primary-footer-color);
        }
        /*footer p {*/
        /*    margin: 5px 0;*/
        /*    font-size: 14px;*/
        /*}*/

        @media (max-width: 768px) {
            .hamburger-button {
                display: flex;
            }

            .content-wrapper {
                position: relative;
            }
            header {
                padding: 2rem 1rem;
            }

            header h1 {
                font-size: 2rem;
            }

            .container {
                padding: 1rem;
            }

            .card {
                padding: 1.5rem;
            }
            .content-wrapper {
                flex-direction: column;
            }
            .sidebar {
                position: fixed;
                top: 0;
                left: 0;
                height: 100vh;
                transform: translateX(-100%);
                z-index: 999;
                background: var(--surface-color);
                padding-top: 80px;
            }

            .sidebar.active {
                transform: translateX(0);
            }

            .sidebar-overlay.active {
                display: block;
            }
        }