body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f0f0f0;
        }

        .menu-bar {
            background-color: #333;
            overflow: hidden;
            width: 100%;
            position: fixed;
            top: 0;
            left: 0;
            z-index: 1000;
        }

        .menu-bar a {
            float: left;
            display: block;
            color: white;
            text-align: center;
            padding: 14px 16px;
            text-decoration: none;
        }

        .menu-bar a:hover {
            background-color: #ddd;
            color: black;
        }

        .menu-bar a.active {
            background-color: #4CAF50;
            color: white;
        }

        .top-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            //height: 80px;
            background-color: #2c3e50;
            color: white;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 5px 5px;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .titles {
            display: flex;
            flex-direction: column;
        }

        .general-title {
            font-size: 1.1em;
            font-weight: bold;
        }

        .lecture-title {
            font-size: 0.9em;
            color: #bdc3c7;
        }

        .menu-right {
            display: flex;
            gap: 10px;
            margin-right: 40px;
        }

        .menu-right a {
            color: white;
            text-decoration: none;
            padding: 8px 12px;
            font-size: 1.1em;
            border-radius: 0;
        }

        .menu-right a:hover {
            background-color: #34495e;
        }

        .slide {
            border: 1px solid #ccc;
            background-color: white;
            margin: 80px auto 20px auto;
            width: 90%;
            max-width: 1200px;
            box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
            display: flex;
            flex-direction: column;
        }

        .header {
            background-color: #007bff;
            color: white;
            padding: 10px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .slide-number,
        .slide-title {
            font-size: 1.2em;
            font-weight: bold;
        }

        .content {
            display: flex;
            flex-direction: row;
            padding: 20px;
            align-items: center;
        }

        .text {
            flex: 2;
            padding-right: 20px;
            text-align: justify;
        }

        .illustration {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .illustration img {
            //max-width: 100%;
            height: auto;
            border: 1px solid #ddd;
            cursor: pointer;
			
        }
	

        h3 {
            font-size: 1.5em;
            color: #333;
        }