.navbar {
    background-color: #fff;
    transition: height 0.3s, padding 0.3s, background-color 0.3s;
}

.navbar-sticky {
    position: -webkit-sticky;
    position: sticky;
    top: 0;
    z-index: 1020;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-sticky .navbar-brand img {
    width: 250px !important;
}

.navbar-sticky.shrink {
    padding-top: 2px;
    padding-bottom: 2px;
    background-color: #ffffff;
}

.navbar-sticky.shrink .navbar-brand img {
    width: 170px !important;
}

.nav-link-letter {
    display: inline-flex;
    height: 2em;
    background-color: #3550a0;
    width: 2em;
    border-radius: 100%;
    justify-content: center;
    align-items: center;
    color: #fff;
    font-weight: bolder;
}