* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Lato', 'Segoe UI', Tahoma, sans-serif;
        }

        body {
            background-color: #f4f5f7; /* Light gray-blue, neutral exam backdrop */
            color: #1e2a44; /* Deep navy for text, authoritative */
            transition: all 0.3s ease;
        }

        body.dark-mode {
            background-color: #1e2a44; /* Dark navy, focused exam vibe */
            color: #d8dee9; /* Light gray-blue for dark mode text */
        }

        .container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 20px;
        }

        .main-content {
            padding: 10px;
        }

        header {
            text-align: center;
            padding: 20px;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff 0%, #f8f9fb 100%); /* White to light gray, clean */
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        body.dark-mode header {
            background: linear-gradient(135deg, #2e3b55 0%, #3e4b66 100%); /* Dark navy gradient */
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        header h1 {
            font-size: 2.1rem;
            font-weight: 700;
            color: #b8860b; /* Dark gold, prestigious exam accent */
            margin-bottom: 15px;
        }

        body.dark-mode header h1 {
            color: #daa520; /* Lighter gold for dark mode */
        }

        .toggle-mode {
            display: inline-block;
            cursor: pointer;
            font-size: 0.9rem;
            font-weight: bold;
            padding: 15px 30px;
            background: #b8860b; /* Dark gold for button */
            color: #ffffff;
            border-radius: 20px;
            transition: background 0.3s, transform 0.2s;
        }

        body.dark-mode .toggle-mode {
            background: #daa520; /* Lighter gold */
        }

        .toggle-mode:hover {
            background: #8b6914; /* Darker gold on hover */
            transform: scale(1.05);
        }

        body.dark-mode .toggle-mode:hover {
            background: #f0c05a; /* Bright gold on hover */
        }

        .department-card {
            background: #ffffff;
            border-radius: 10px;
            margin-bottom: 20px;
            padding: 20px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            transition: box-shadow 0.3s ease;
        }

        body.dark-mode .department-card {
            background: #2e3b55; /* Dark navy for cards */
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        .department-card:hover {
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
        }

        body.dark-mode .department-card:hover {
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
        }

        .department-card h2 {
            font-size: 1.7rem;
            font-weight: 600;
            color: #1e2a44; /* Deep navy for card headings */
            margin-bottom: 10px;
        }

        body.dark-mode .department-card h2 {
            color: #d8dee9; /* Light gray-blue for dark mode */
        }

        .department-content {
            padding: 10px 0;
        }

        .department-content p {
            font-size: 0.9rem;
            color: #3e4b66; /* Medium navy for text */
            line-height: 1.6;
            margin-bottom: 12px;
        }

        body.dark-mode .department-content p {
            color: #a3b1c6; /* Lighter navy for dark mode */
        }

        .department-content h3 {
            font-size: 1.1rem;
            font-weight: 500;
            color: #b8860b; /* Dark gold for subheadings */
            margin-bottom: 8px;
        }

        body.dark-mode .department-content h3 {
            color: #daa520; /* Lighter gold for dark mode */
        }

        .department-content ul {
            list-style: none;
            padding-left: 0;
        }

        .department-content li {
            font-size: 0.9rem;
            color: #1e2a44; /* Deep navy for list items */
            margin: 6px 0;
            position: relative;
            padding-left: 18px;
        }

        body.dark-mode .department-content li {
            color: #d8dee9; /* Light gray-blue for dark mode */
        }

        .department-content li::before {
            content: '➔';
            position: absolute;
            left: 0;
            color: #b8860b; /* Dark gold for bullets */
            font-size: 0.9rem;
        }

        body.dark-mode .department-content li::before {
            color: #daa520; /* Lighter gold for dark mode */
        }

        @media (max-width: 768px) {
            .container {
                padding: 15px;
            }

            header {
                padding: 15px;
            }

            header h1 {
                font-size: 1.9rem;
            }

            .department-card {
                padding: 15px;
            }

            .department-card h2 {
                font-size: 1.5rem;
            }

            .department-content h3 {
                font-size: 1rem;
            }

            .department-content p,
            .department-content li {
                font-size: 0.85rem;
            }

            .toggle-mode {
                font-size: 0.85rem;
                padding: 15px 25px;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0px;
            }

            header {
                padding: 12px;
            }

            header h1 {
                font-size: 1.7rem;
                margin-bottom: 12px;
            }

            .department-card {
                margin-bottom: 15px;
                padding: 12px;
            }

            .department-card h2 {
                font-size: 1.4rem;
            }

            .department-content h3 {
                font-size: 0.95rem;
            }

            .toggle-mode {
                font-size: 0.8rem;
                padding: 10px 20px;
            }
        }