.topics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .topic-card {
            background: white;
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-top: 4px solid #2c5f41;
        }

        .topic-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        .topic-card h3 {
            color: #2c3e50;
            font-size: 1.8em;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .topic-icon {
            width: 40px;
            height: 40px;
            background: #2c5f41;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 1.2em;
        }

        .topic-list {
            list-style: none;
        }

        .topic-list li {
            padding: 12px 0;
            border-bottom: 1px solid #eee;
            color: #555;
            /* color: blue; */
            transition: all 0.2s ease;
            cursor: pointer;
            padding-left: 20px;
            position: relative;
        }

        .topic-list li:last-child {
            border-bottom: none;
        }

        .topic-list li:before {
            content: "→";
            position: absolute;
            left: 0;
            color: #2c5f41;
            font-weight: bold;
            opacity: 0;
            transition: opacity 0.2s ease;
        }

        .topic-list li:hover {
            color: #2c5f41;
            padding-left: 30px;
        }

        .topic-list li:hover:before {
            opacity: 1;
        }

        @media (max-width: 768px) {
            .topics-grid {
                grid-template-columns: 1fr;
            }

            .container {
                padding: 20px;
            }
        }