.page-content {
    background-color: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    max-width: 1200px;
    margin: 40px auto;
    line-height: 1.6;
}

.page-content h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    border-bottom: 2px solid #eee;
    padding-bottom: 15px;
    margin-bottom: 30px;
}

.page-content h3 {
    font-size: 1.8rem;
    color: #007bff;
    margin-top: 40px;
    margin-bottom: 15px;
}

.page-content p {
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.page-content ul {
    margin-bottom: 20px;
    margin-left: 25px;
}

.page-content li {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.key-concepts {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 30px;
    flex-wrap: wrap; 
}

.key-concepts > div {
    flex: 1;
    min-width: 300px; 
    padding: 20px;
    border: 1px solid #2c3e50;
    border-radius: 8px;
    background-color: #f0f4f7;
}

.key-concepts h3 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-top: 0;
    border-bottom: 1px dashed #2c3e50;
    padding-bottom: 5px;
}

.institutions li {
    font-weight: bold;
    color: #34495e;
}