:root {
            --bg-color: #f5f7fa;
            --text-color: #2d3436;
            --primary-color: #0984e3;
            --secondary-color: #00b894;
            --accent-color: #e17055;
            --card-bg: #ffffff;
            --border-color: #dfe6e9;
        }

        .dark-mode {
            --bg-color: #1e272e;
            --text-color: #f5f6fa;
            --primary-color: #74b9ff;
            --secondary-color: #55efc4;
            --accent-color: #fab1a0;
            --card-bg: #2d3436;
            --border-color: #3d484d;
        }

        body {
            font-family: 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            background-color: var(--bg-color);
            color: var(--text-color);
            transition: all 0.4s ease;
        }

        .container {
            max-width: 900px;
            margin: 0 auto;
            padding: 20px;
        }

        .header {
            text-align: center;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 2px dashed var(--primary-color);
        }

        h1 {
            color: var(--primary-color);
            font-size: 2.4rem;
            margin-bottom: 10px;
            font-weight: 700;
        }

        .subtitle {
            color: var(--secondary-color);
            font-size: 1.1rem;
            font-weight: 500;
        }

        .department-card {
            background-color: var(--card-bg);
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border-left: 5px solid var(--accent-color);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .department-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
        }

        h2 {
            color: var(--secondary-color);
            font-size: 1.5rem;
            margin-top: 0;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }

        h2::before {
            content: "▹";
            color: var(--accent-color);
            margin-right: 10px;
            font-size: 1.8rem;
        }

        .department-info {
            margin-bottom: 20px;
            padding-left: 5px;
        }

        .post-container {
            background-color: rgba(0, 0, 0, 0.03);
            border-radius: 8px;
            padding: 15px;
            margin-top: 15px;
        }

        .dark-mode .post-container {
            background-color: rgba(255, 255, 255, 0.05);
        }

        .post-title {
            font-weight: 600;
            color: var(--accent-color);
            margin-bottom: 10px;
            display: inline-block;
            border-bottom: 2px dotted var(--accent-color);
            padding-bottom: 3px;
        }

        .post-list {
            list-style-type: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
        }

        .post-list li {
            padding: 8px 12px;
            background-color: rgba(0, 184, 148, 0.1);
            border-radius: 5px;
            font-weight: 500;
            position: relative;
            padding-left: 25px;
        }

        .dark-mode .post-list li {
            background-color: rgba(85, 239, 196, 0.1);
        }

        .post-list li::before {
            content: "✓";
            color: var(--secondary-color);
            position: absolute;
            left: 8px;
            font-weight: bold;
        }

        .mode-toggle {
            /* position: fixed;
            bottom: 20px;
            right: 20px; */
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 10px 15px;
            border-radius: 50px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 8px;
            z-index: 100;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
            transition: all 0.3s;
        }

        .mode-toggle:hover {
            background: var(--secondary-color);
            transform: translateY(-2px);
        }

        .right {
            display: flex;
            justify-content: flex-end;
            margin-bottom: 10px;
        }

        .category-tag {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 3px 10px;
            border-radius: 15px;
            font-size: 0.8rem;
            margin-left: 10px;
            vertical-align: middle;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }

            .department-card {
                padding: 20px;
            }

            .post-list {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 15px;
            }

            h1 {
                font-size: 1.7rem;
            }

            h2 {
                font-size: 1.3rem;
                flex-direction: column;
            }

            .category-tag {
                margin-left: 0px;
                margin-top: 10px;
            }

            h2::before {
                content: "▼";
            }

            .mode-toggle {
                /* bottom: 15px;
                right: 15px; */
                padding: 8px 12px;
                font-size: 0.9rem;
            }
        }