.collection-control-title {
    flex: 0 0 110px;
    width: 110px;
    text-align: left;
    align-self: center;
    padding-right: 8px;
}

.btn-outline-light:not(:disabled):not(.disabled).active, .btn-outline-light:not(:disabled):not(.disabled):active, .show>.btn-outline-light.dropdown-toggle, .btn-outline-light:hover {
    background: var(--color-pale-blue);
    border-color: var(--color-border);
}

.btn-outline-light {
    border-color: var(--color-border);
}

.btn-sm {
    padding: 2px 6px;
}

.header .btn-outline-light {
    border-color: var(--color-white);
}

/* menu button tweaks */
.collections-inner {
    display: flex;
    flex-wrap: wrap;
    row-gap: 4px;
}

@media screen and (max-width: 1200px) {
    .main-header-collections {
        display: flex;
        align-items: center;
        width: 100%;
    }

    .collection-control-title {
        align-self: center;
        padding-top: 0;
    }

    .collections-inner {
        flex: 1 1 auto;
    }

    .collection-group .btn-group {
        display: flex;
        flex-wrap: wrap;
    }

    .collection-group {
        margin: 0 6px 4px 0;
    }
}

.collection-group .btn {
    /* remove extra spacing so buttons sit flush; borders will join naturally */
    margin: 0;
}

/* collapse adjacent borders in a button group */
.collection-group .btn + .btn {
    margin-left: -1px;      /* overlap borders to avoid double-thick line */
}

.collection-group .btn:first-child {
    border-top-left-radius: .25rem;
    border-bottom-left-radius: .25rem;
}
.collection-group .btn:last-child {
    border-top-right-radius: .25rem;
    border-bottom-right-radius: .25rem;
}

/* ensure buttons in header have white text and highlight on hover/focus */
.main-header .btn-outline-light {
    color: var(--color-white);
}
.main-header .btn-outline-light:hover,
.main-header .btn-outline-light:focus {
    color: var(--color-white);
    background-color: var(--color-blue);
}

/* Mobile: stack collection title above the set buttons */
@media screen and (max-width: 600px) {
    .main-header-collections {
        flex-direction: column;
        align-items: center;
    }

    .collection-control-title {
        width: 100%;
        flex: 0 0 auto;
        padding-right: 0;
        padding-bottom: 4px;
        font-size: 11px;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        opacity: 0.75;
        text-align: center;
    }

    .collections-inner {
        width: 100%;
        justify-content: center;
    }

    .collection-group {
        align-items: center;
        margin: 0 6px 6px 6px;
    }

    .collection-group .btn-group {
        justify-content: center;
    }
}