.page-header {
    margin: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.lesson-grid {
    margin: 40px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 25px;
}

button {
    padding: 8px 14px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
}