/* ============================================
   Component: App Header (Navigation Chrome)
   ============================================ */

.app-header {
    height: 56px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

/* --- Desktop layout --- */

.app-header__desktop {
    display: none;
    align-items: center;
    height: 100%;
    padding-inline: var(--space-5);
    gap: var(--space-4);
}

@media (min-width: 768px) {
    .app-header__desktop {
        display: flex;
    }
}

.app-header__logo {
    font-family: var(--font-ui);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
    transition: color 150ms ease;
}

.app-header__logo:hover {
    color: var(--accent);
}

.app-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-left: auto;
    flex-shrink: 0;
}

.app-header__link {
    font-family: var(--font-ui);
    font-size: var(--text-sm);
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.15s ease;
}

.app-header__link:hover {
    color: var(--text-primary);
}

/* --- Breadcrumb (app-header scoped) --- */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    overflow: hidden;
    flex: 1;
    min-width: 0;
}

.breadcrumb__item {
    font-family: var(--font-ui);
    font-size: var(--text-sm);
    color: var(--text-muted);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
    transition: color 0.15s ease;
}

a.breadcrumb__item:hover {
    color: var(--text-primary);
}

.breadcrumb__item--current {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb__sep {
    color: var(--text-disabled);
    font-size: var(--text-sm);
    user-select: none;
    flex-shrink: 0;
}

/* --- Mobile layout --- */

.app-header__mobile {
    display: none;
    align-items: center;
    height: 100%;
    padding-inline: var(--space-4);
    position: relative;
}

@media (max-width: 767px) {
    .app-header__mobile {
        display: flex;
    }
}

.app-header__world-name {
    font-family: var(--font-ui);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: calc(100% - 48px);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.app-header__mobile .app-header__link {
    margin-left: auto;
    font-size: var(--text-base);
}