/* Navigation: brand, nav links, language switcher, back links, tabs, breadcrumbs.
   Positioning of the navbar itself is in layout.css. */
.app-brand {
    display: inline-flex;
    align-items: center;
    gap: var(--app-space-2);
    color: var(--app-text-strong);
    font-family: var(--app-font-display);
    font-size: var(--app-text-xl);
    font-weight: 800;
    letter-spacing: -0.01em;
    text-decoration: none;
    white-space: nowrap;
}

.app-brand:hover {
    color: var(--app-primary-soft);
}

.app-brand__mark {
    width: 1.75rem;
    height: 1.75rem;
    flex-shrink: 0;
}

.app-brand__tld {
    color: var(--app-primary);
}

.app-nav-link {
    display: flex;
    align-items: center;
    gap: var(--app-space-3);
    padding: 0.55rem 0.8rem;
    border-radius: var(--app-radius);
    color: var(--app-muted);
    font-weight: 500;
    font-size: var(--app-text-sm);
    text-decoration: none;
    white-space: nowrap;
    transition: color var(--app-transition), background var(--app-transition);
}

.app-nav-link .app-icon {
    width: 1.25rem;
    height: 1.25rem;
}

.app-nav-link:hover {
    color: var(--app-text-strong);
    background: rgba(214, 178, 120, 0.08);
}

.app-nav-link.is-active {
    color: var(--app-primary-soft);
    background: var(--app-primary-glow);
    box-shadow: inset 3px 0 0 var(--app-primary);
}

.app-nav-link--accent {
    color: var(--app-primary);
}

.app-nav-link--danger {
    color: var(--app-danger-soft);
}

/* Rail buttons: square icon buttons with a tooltip-ish title. */
.app-rail-button {
    display: inline-flex;
    width: 2.4rem;
    height: 2.4rem;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: var(--app-radius);
    color: var(--app-muted);
    text-decoration: none;
    background: transparent;
    transition: color var(--app-transition), background var(--app-transition), border-color var(--app-transition);
}

.app-rail-button .app-icon {
    width: 1.25rem;
    height: 1.25rem;
}

.app-rail-button:hover {
    color: var(--app-text-strong);
    border-color: var(--app-border);
    background: rgba(214, 178, 120, 0.08);
}

.app-rail-button--primary {
    color: var(--app-primary-contrast);
    background: var(--app-primary);
}

.app-rail-button--primary:hover {
    color: var(--app-primary-contrast);
    background: var(--app-primary-soft);
}

.app-rail-button.is-active {
    color: var(--app-primary-soft);
    background: var(--app-primary-glow);
}

.app-nav-user {
    color: var(--app-muted);
    font-size: var(--app-text-sm);
    padding-inline: var(--app-space-2);
}

/* Language switcher: a flag button per alternative language. */
.app-language-switcher {
    display: inline-flex;
    align-items: center;
}

.app-language-flag-button {
    display: inline-flex;
    width: 2.4rem;
    height: 2.4rem;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: var(--app-radius);
    background: transparent;
    transition: border-color var(--app-transition), background var(--app-transition);
}

.app-language-flag-button:hover {
    border-color: var(--app-border);
    background: rgba(214, 178, 120, 0.08);
}

.app-language-flag-image {
    display: block;
    width: 1.35rem;
    height: 0.9rem;
    object-fit: cover;
    border-radius: 0.15rem;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.2);
}

/* Back link above detail headers. */
.app-backlink {
    display: inline-flex;
    align-items: center;
    gap: var(--app-space-1);
    margin-bottom: var(--app-space-3);
    color: var(--app-muted);
    font-size: var(--app-text-sm);
    text-decoration: none;
}

.app-backlink:hover {
    color: var(--app-text-strong);
}

/* Tabs. */
.app-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--app-space-1);
    margin-bottom: var(--app-space-5);
    padding: 0;
    border-bottom: 1px solid var(--app-border);
    list-style: none;
}

.app-tabs a {
    display: inline-block;
    padding: 0.55rem 0.9rem;
    margin-bottom: -1px;
    border-bottom: 2px solid transparent;
    color: var(--app-muted);
    font-weight: 500;
    font-size: var(--app-text-sm);
    text-decoration: none;
}

.app-tabs a:hover {
    color: var(--app-text-strong);
}

.app-tabs a.is-active {
    color: var(--app-primary-soft);
    border-bottom-color: var(--app-primary);
}

/* Breadcrumbs. */
.app-breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--app-space-1);
    margin: 0 0 var(--app-space-3);
    padding: 0;
    list-style: none;
    color: var(--app-muted);
    font-size: var(--app-text-sm);
}

.app-breadcrumbs li + li::before {
    margin-inline: var(--app-space-1);
    content: "/";
    color: var(--app-faint);
}

.app-breadcrumbs a {
    color: var(--app-muted);
    text-decoration: none;
}

.app-breadcrumbs a:hover {
    color: var(--app-text-strong);
}