/* Full-width ZLW workspace. The header takes its real height in normal flow. */
.has-app-shell:is(.teacher-zlw-area, .teacher-administration-area) {
    --sidebar-width: 0px;
    --content-gutter: .6rem;
    padding-top: 0;
}

:is(.teacher-zlw-area, .teacher-administration-area) .site-header {
    position: sticky;
    top: 0;
    min-height: 0;
    flex: 0 0 auto;
}

:is(.teacher-zlw-area, .teacher-administration-area) .site-header-inner {
    min-height: 54px;
    padding: .3rem var(--content-gutter);
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: none;
    gap: .5rem;
}

:is(.teacher-zlw-area, .teacher-administration-area) .topbar-workspace {
    grid-area: auto;
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: .25rem .4rem;
    min-width: 0;
}

:is(.teacher-zlw-area, .teacher-administration-area) .topbar-workspace > .portal-area-switcher {
    white-space: nowrap;
}

:is(.teacher-zlw-area, .teacher-administration-area) :is(.main-lzk-classes, .student-results-classes, .teacher-classes) {
    display: flex;
    flex: 0 1 auto;
    flex-wrap: nowrap;
    align-items: center;
    gap: .4rem;
    min-width: 0;
    max-width: 100%;
    max-height: none;
    padding: 0;
    overflow-x: auto;
    overscroll-behavior: contain;
    user-select: none;
}

:is(.teacher-zlw-area, .teacher-administration-area) :is(.main-lzk-class-group, .student-results-class-group, .teacher-class-group) {
    flex: 0 0 auto;
    flex-wrap: nowrap;
    overflow: hidden;
    max-width: none;
}

:is(.teacher-zlw-area, .teacher-administration-area) .site-header a[aria-disabled="true"] {
    opacity: .5;
    cursor: default;
}

:is(.teacher-zlw-area, .teacher-administration-area) .account-area {
    grid-area: auto;
    gap: .45rem;
    font-size: .76rem;
}

:is(.teacher-zlw-area, .teacher-administration-area) .account-area .button {
    min-height: 30px;
    padding: .3rem .5rem;
}

:is(.teacher-zlw-area, .teacher-administration-area) .account-summary small {
    display: none;
}

.teacher-navigation {
    display: flex;
    max-width: 100%;
    flex: 0 0 auto;
    flex-wrap: nowrap;
    align-items: center;
    gap: .15rem;
    min-width: 0;
    font-size: .76rem;
    user-select: none;
}

.teacher-navigation :is(a, summary) {
    display: block;
    padding: .35rem .4rem;
    border-radius: 3px;
    color: var(--navy-deep);
    text-decoration: none;
    line-height: 1.15;
    cursor: pointer;
}

.teacher-navigation > a,
.teacher-navigation summary {
    white-space: nowrap;
}

.teacher-navigation :is(a, summary):hover {
    background: var(--teal-light);
}

:is(.teacher-zlw-area, .teacher-administration-area) .site-header :is(a, summary):focus-visible {
    outline: 2px solid var(--navy);
    outline-offset: -2px;
}

.teacher-navigation :is([aria-current="page"], .is-active) {
    color: white;
    background: var(--navy);
}

.teacher-navigation :is([aria-current="page"], .is-active):hover {
    color: white;
    background: var(--navy-strong);
}

.teacher-navigation-menu {
    position: relative;
}

.teacher-navigation-menu > summary {
    list-style: none;
}

.teacher-navigation-menu > summary::-webkit-details-marker {
    display: none;
}

.teacher-navigation-menu > summary::after {
    content: " ▾";
}

.teacher-navigation-panel {
    position: absolute;
    z-index: 2;
    top: calc(100% + .2rem);
    left: 0;
    width: 330px;
    max-width: calc(100vw - 1.2rem);
    max-height: min(65dvh, 560px);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: .3rem;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: white;
    box-shadow: var(--shadow);
}

.teacher-navigation-menu:last-child .teacher-navigation-panel {
    left: auto;
    right: 0;
}

@media (max-width: 1800px) {
    :is(.teacher-zlw-area, .teacher-administration-area) .account-summary,
    :is(.teacher-zlw-area, .teacher-administration-area) .topbar-student-view {
        display: none;
    }
}

@media (max-width: 1150px) {
    :is(.teacher-zlw-area, .teacher-administration-area) .topbar-workspace { flex-wrap: wrap; }
    .teacher-navigation { flex-wrap: wrap; }
}

@media (max-width: 760px) {
    :is(.teacher-zlw-area, .teacher-administration-area) .site-header-inner {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    :is(.teacher-zlw-area, .teacher-administration-area) .account-area {
        align-self: start;
    }

    .teacher-navigation :is(a, summary) {
        padding: .4rem .45rem;
    }

    .teacher-navigation-panel,
    .teacher-navigation-menu:last-child .teacher-navigation-panel {
        position: fixed;
        right: auto;
        top: var(--topbar-height);
        left: var(--content-gutter);
        width: calc(100vw - 1.2rem);
        max-height: calc(100dvh - var(--topbar-height) - .5rem);
    }
}

@media (max-width: 540px) {
    :is(.teacher-zlw-area, .teacher-administration-area) .site-header-inner { grid-template-columns: minmax(0, 1fr); }
    :is(.teacher-zlw-area, .teacher-administration-area) .account-area { justify-self: end; }
}

@media print {
    :is(.teacher-zlw-area, .teacher-administration-area) .site-header { display: none; }
}

:is(.teacher-zlw-area, .teacher-administration-area) .teacher-classes {
    font-size: .76rem;
}

:is(.teacher-zlw-area, .teacher-administration-area) .teacher-class-group {
    display: inline-flex;
    align-items: center;
}

:is(.teacher-zlw-area, .teacher-administration-area) .teacher-class-group a {
    text-align: center;
    text-decoration: none;
}

/* A shared minimum height prevents a jump when switching portal areas. */
.has-app-shell .site-header,
.has-app-shell .site-header-inner { min-height: 54px; }

/* Keep topic names on one line; clamp the popup to the viewport after opening. */
.teacher-navigation-panel.teacher-task-menu {
    width: max-content; min-width: 330px; max-width: calc(100vw - 1.2rem);
    overflow: auto;
}
.teacher-task-menu a { white-space: nowrap; }
@media (max-width: 760px) {
    .teacher-navigation-panel.teacher-task-menu { min-width: 0; }
}

/* Compact class and learning-unit controls share their complete metrics. */
:root body.has-app-shell :is(.main-lzk-class-group, .student-results-class-group, .teacher-class-group, .kor-class-switcher, .main-lzk-unit-group) a {
    min-width: 29px;
    padding: .35rem .3rem;
    font-size: .69rem;
    line-height: 1.15;
    letter-spacing: 0;
    font-variant-numeric: tabular-nums;
}

.portal-area-separator {
    flex: 0 0 1px;
    width: 1px;
    height: 2rem;
    background: rgba(20, 32, 51, .1);
}