* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            background: linear-gradient(135deg, #1a2a6c, #2a3a7c);
            color: white;
            padding: 30px 0;
            text-align: center;
            border-radius: 0 0 10px 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
        }
        
        .logo {
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
        }
        
        .logo-icon {
            font-size: 2.5rem;
            margin-right: 15px;
        }
        
        /* Navigation Menu Styles */
        .main-nav {
            background: #fff;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .nav-menu li {
            margin: 0;
        }
        
        .nav-menu a {
            display: block;
            padding: 15px 25px;
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: all 0.3s ease;
            border-bottom: 3px solid transparent;
        }
        
        .nav-menu a:hover {
            background-color: #f0f5ff;
            color: #1a2a6c;
            border-bottom: 3px solid #1a2a6c;
        }
        
        .nav-menu .current a {
            color: #1a2a6c;
            border-bottom: 3px solid #1a2a6c;
            background-color: #f0f5ff;
        }
        
        /* Responsive navigation */
        @media (max-width: 768px) {
            .nav-menu {
                flex-direction: column;
            }
            
            .nav-menu li {
                width: 100%;
                text-align: center;
            }
        }
        
        .professor-info {
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            margin-bottom: 30px;
            display: flex;
            align-items: center;
            gap: 20px;
        }
        
        .professor-avatar {
            font-size: 4rem;
        }
        
        .dashboard-section {
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            margin-bottom: 30px;
        }
        
        .section-title {
            font-size: 1.5rem;
            color: #1a2a6c;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e0e7ff;
        }

        /* Services Grid Layout */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
            margin-top: 20px;
        }

        .service-column {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 25px;
            border-left: 4px solid #007bff;
            transition: all 0.3s ease;
        }

        .service-column:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }

        .service-column h3 {
            color: #1a2a6c;
            margin-bottom: 20px;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .service-column h3 i {
            color: #007bff;
        }

        .resource-list {
            list-style-type: none;
        }

        .resource-list li {
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px solid #e9ecef;
        }

        .resource-list li:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .resource-title {
            font-weight: 600;
            color: #2c3e50;
            margin-bottom: 8px;
            font-size: 1.1rem;
        }

        .resource-title a {
            color: #1a2a6c;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .resource-title a:hover {
            color: #007bff;
            text-decoration: underline;
        }

        .resource-description {
            color: #666;
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .more-content {
            display: none;
            margin-top: 10px;
            color: #555;
            line-height: 1.5;
        }

        .btn-read-more {
            background: #007bff;
            color: white;
            border: none;
            padding: 5px 12px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 0.85rem;
            transition: all 0.3s ease;
            margin-top: 5px;
        }

        .btn-read-more:hover {
            background: #0056b3;
            transform: translateY(-1px);
        }

        .notes-list {
            list-style-type: none;
        }

        .notes-list li {
            margin-bottom: 15px;
            padding: 15px;
            background: white;
            border-radius: 6px;
            border-left: 3px solid #28a745;
            transition: all 0.3s ease;
        }

        .notes-list li:hover {
            transform: translateX(5px);
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
        }

        .notes-list a {
            color: #1a2a6c;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .notes-list a:hover {
            color: #007bff;
            text-decoration: underline;
        }

        .latex {
            font-family: "Latin Modern Roman", serif;
            font-style: italic;
            font-weight: bold;
        }

        footer {
            text-align: center;
            padding: 20px 0;
            margin-top: 40px;
            border-top: 1px solid #e0e7ff;
            color: #666;
            font-size: 0.9rem;
        }
        
        footer a {
            color: #1a2a6c;
            text-decoration: none;
            margin: 0 5px;
        }
        
        footer a:hover {
            text-decoration: underline;
        }

        /* Responsive adjustments */
        @media (max-width: 768px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
            
            .service-column {
                padding: 20px;
            }
        }