.app-logo {
    font-size: 2.1rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-align: center;
    margin-bottom: 18px;
}

.navbar-nav .nav-link, .navbar-nav .dropdown-toggle {
    padding-top: 0.45rem;
    padding-bottom: 0.45rem;
    padding-left: 1.1rem;
    padding-right: 1.1rem;
    line-height: 1.5;
    border-radius: 6px;
    font-weight: 500;
    transition: background 0.12s;
}
.navbar-nav .nav-link.active, .navbar-nav .nav-link:focus, .navbar-nav .nav-link:hover,
.navbar-nav .dropdown-toggle:focus, .navbar-nav .dropdown-toggle:hover {
    background: #343a40;
    color: #fff !important;
}
.dropdown-menu-dark {
    background-color: #23272b;
    border-radius: 6px;
    border: none;
    box-shadow: 0 4px 24px rgba(0,0,0,0.25);
}
.dropdown-menu-dark .dropdown-item {
    color: #ddd;
    padding: 0.55rem 1.3rem;
    font-weight: 500;
}
.dropdown-menu-dark .dropdown-item.active,
.dropdown-menu-dark .dropdown-item:active,
.dropdown-menu-dark .dropdown-item:hover {
    background: #0d6efd !important;
    color: #fff !important;
}
.navbar .btn-sm, .navbar .btn-outline-primary, .navbar .btn-outline-light {
    padding-top: 0.45rem;
    padding-bottom: 0.45rem;
    border-radius: 6px;
    font-weight: 500;
    min-width: 70px;
}