header {
    position: relative;
    z-index: 200;
}
.t-app-header {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: .25rem .75rem;
    background-color: var(--t-color-secondary);
    border-bottom: 1px solid var(--t-color-light_gray);
}
.t-user-menu {
    position: relative;
    overflow: visible !important;
    padding: 0;
}
.t-user-menu summary {
    list-style: none;
    display: flex;
    align-items: center;
    gap: .35rem;
    cursor: pointer;
    font-size: .875rem;
    color: var(--t-color);
    padding: .25rem .5rem;
    border-radius: .25rem;
    user-select: none;
}
.t-user-menu summary::-webkit-details-marker { display: none; }
.t-user-menu summary:hover { background-color: var(--t-color-primary-nav_hover); }
.t-user-menu_chevron {
    width: .75rem;
    height: .75rem;
    fill: currentColor;
    transition: transform 200ms ease;
}
.t-user-menu[open] .t-user-menu_chevron { transform: rotate(180deg); }
.t-user-menu_list {
    position: absolute;
    right: 0;
    top: calc(100% + .25rem);
    min-width: 10rem;
    margin: 0;
    padding: .25rem 0;
    list-style: none;
    background: white;
    border: 1px solid var(--t-color-light_gray);
    border-radius: .25rem;
    box-shadow: 0 2px 6px hsla(0,0%,0%,.12);
    z-index: 1000;
}
.t-user-menu_list a {
    display: block;
    padding: .4rem 1rem;
    font-size: .875rem;
    color: var(--t-color-primary);
    text-decoration: none;
}
.t-user-menu_list a:hover { background-color: var(--t-color-primary-nav_hover); }
.t-user-menu_list li + li { border-top: 1px solid var(--t-color-light_gray); }