/*
 * Keep the Student navigation effects identical to the Lecturer portal.
 * This global layer intentionally loads after the scoped bundle so the
 * interaction styling remains stable even when Blazor CSS isolation changes.
 */
.portal-sidebar .portal-drawer__nav-scroll {
    padding: 2px 3px var(--space-3) 2px;
    margin-right: -2px;
    scrollbar-gutter: stable;
}

.portal-sidebar .portal-drawer__nav-scroll::-webkit-scrollbar {
    width: 5px;
}

.portal-sidebar .portal-drawer__nav-scroll::-webkit-scrollbar-thumb {
    border: 1px solid var(--color-surface);
    border-radius: var(--radius-pill);
    background: var(--color-border-strong);
}

.portal-sidebar .portal-drawer__nav-scroll::-webkit-scrollbar-thumb:hover {
    background: color-mix(in srgb, var(--color-brand-900) 26%, var(--color-border));
}

.portal-sidebar .portal-nav-group + .portal-nav-group {
    position: relative;
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 0;
}

.portal-sidebar .portal-nav-group + .portal-nav-group::before {
    content: "";
    position: absolute;
    top: 0;
    left: var(--space-2);
    right: var(--space-2);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-strong) 16%, var(--color-border-strong) 84%, transparent);
}

.portal-sidebar .portal-nav-group__label {
    margin: 0 var(--space-2) 6px;
    color: var(--color-text-muted);
    font-size: 0.62rem;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.portal-sidebar .portal-nav-group__items {
    gap: 3px;
}

/* Lecturer's subtle per-item separator — the missing visual effect in Student. */
.portal-sidebar .portal-nav-link + .portal-nav-link {
    margin-top: 0.16rem;
}

.portal-sidebar .portal-nav-link + .portal-nav-link::before {
    content: "";
    position: absolute;
    top: -0.16rem;
    left: 0.9rem;
    right: 0.9rem;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        hsla(var(--brand-h, 218), 79%, 42%, 0.12),
        hsla(var(--brand-accent-h, 37), 55%, 47%, 0.09),
        transparent
    );
    opacity: 0.95;
    pointer-events: none;
}

.portal-sidebar .portal-nav-link:hover::before,
.portal-sidebar .portal-nav-link.active::before {
    background: linear-gradient(
        90deg,
        transparent,
        hsla(var(--brand-h, 218), 79%, 42%, 0.18),
        hsla(var(--brand-accent-h, 37), 55%, 47%, 0.14),
        transparent
    );
    box-shadow: 0 0 10px hsla(var(--brand-h, 218), 79%, 42%, 0.08);
}

.portal-sidebar .portal-nav-link {
    min-height: 44px;
    grid-template-columns: 32px minmax(0, 1fr) auto;
    gap: var(--space-2);
    padding: 4px 8px;
    overflow: visible;
    border: 1px solid transparent;
    border-radius: 8px;
    color: var(--color-text-secondary) !important;
    background: transparent;
    box-shadow: none;
    transition:
        color var(--motion-fast),
        border-color var(--motion-fast),
        background-color var(--motion-fast),
        box-shadow var(--motion-fast),
        transform 0.18s ease;
}

.portal-sidebar .portal-nav-link:hover {
    transform: translateX(1px);
    border-color: var(--color-border);
    color: var(--color-text-primary) !important;
    background: var(--color-surface-hover);
    box-shadow: none;
}

.portal-sidebar .portal-nav-link.active,
.portal-sidebar .portal-nav-link.active:hover {
    border-color: var(--color-brand-100);
    color: var(--color-brand-900) !important;
    background: var(--color-brand-50);
    background-image: none;
    box-shadow: inset 3px 0 0 var(--color-brand-900);
}

.portal-sidebar .portal-nav-link__icon {
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    background: transparent;
    box-shadow: none;
    transition:
        color var(--motion-fast),
        border-color var(--motion-fast),
        background-color var(--motion-fast);
}

.portal-sidebar .portal-nav-link__icon .mud-icon-root {
    font-size: 1.02rem;
}

.portal-sidebar .portal-nav-link:hover .portal-nav-link__icon {
    color: var(--color-text-primary);
    background: var(--color-surface-subtle);
}

.portal-sidebar .portal-nav-link.active .portal-nav-link__icon {
    border: 0;
    color: var(--color-brand-900);
    background: color-mix(in srgb, var(--color-brand-100) 72%, var(--color-surface));
    box-shadow: none;
}

.portal-sidebar .portal-nav-link__title {
    min-width: 0;
    overflow: hidden;
    color: inherit;
    font-size: 0.77rem;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.005em;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.portal-sidebar .portal-nav-link.active .portal-nav-link__title {
    font-weight: 700;
}

.portal-sidebar .portal-nav-link__badge {
    min-width: 19px;
    height: 19px;
    padding-inline: 5px;
    border: 2px solid var(--color-surface);
    color: #fff;
    background: var(--color-danger);
    box-shadow: none;
    font-size: 0.6rem;
    font-weight: 750;
}

.portal-sidebar .portal-nav-link:focus-visible {
    outline: 2px solid var(--color-brand-700);
    outline-offset: 2px;
}

.portal-shell--drawer-collapsed .portal-sidebar .portal-nav-group + .portal-nav-group {
    margin-top: var(--space-2);
    padding-top: var(--space-2);
}

.portal-shell--drawer-collapsed .portal-sidebar .portal-nav-group + .portal-nav-group::before {
    left: 8px;
    right: 8px;
}

.portal-shell--drawer-collapsed .portal-sidebar .portal-nav-link {
    width: 40px;
    min-height: 40px;
    grid-template-columns: 1fr;
    justify-items: center;
    margin-inline: auto;
    padding: 4px;
}

.portal-shell--drawer-collapsed .portal-sidebar .portal-nav-link.active {
    box-shadow: inset 0 -3px 0 var(--color-brand-900);
}