/* Header / navbar atas */
.iku12-topbar {
    background: #fff;
    border-bottom: 1px solid var(--iku-border-color);
    box-shadow: 0 4px 24px 0 rgba(34, 41, 47, 0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.iku12-topbar-inner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.iku12-brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    text-decoration: none;
    color: inherit;
}

.iku12-brand-icon {
    width: 42px;
    height: 42px;
    border-radius: 0.428rem;
    background: var(--iku-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(var(--iku-primary-rgb), 0.4);
}

.iku12-brand-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--iku-heading-color);
    line-height: 1.2;
    margin: 0;
}

.iku12-brand-subtitle {
    font-size: 0.75rem;
    color: var(--iku-body-color);
    margin: 2px 0 0;
}

.iku12-nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.iku12-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: 0.358rem;
    font-size: 0.857rem;
    font-weight: 500;
    text-decoration: none;
    transition: 0.2s ease;
    border: 1px solid transparent;
}

.iku12-nav-btn--outline {
    background: #fff;
    border-color: var(--iku-border-color);
    color: var(--iku-body-color);
}

.iku12-nav-btn--outline:hover {
    border-color: var(--iku-primary);
    color: var(--iku-primary);
}

.iku12-nav-btn--outline.active {
    border-color: var(--nav-accent, var(--iku-primary));
    color: var(--nav-accent, var(--iku-primary));
    background: rgba(var(--iku-primary-rgb), 0.08);
}

.iku12-nav-btn__label {
    white-space: nowrap;
}

@media (max-width: 1199.98px) {
    .iku12-topbar-inner {
        flex-direction: column;
        align-items: stretch;
    }

    .iku12-nav-actions {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.25rem;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }

    .iku12-nav-btn {
        flex-shrink: 0;
        padding: 0.45rem 0.75rem;
        font-size: 0.8rem;
    }
}

.iku12-nav-btn--primary {
    background: var(--iku-primary);
    color: #fff;
    border-color: var(--iku-primary);
}

.iku12-nav-btn--primary:hover {
    color: #fff;
    background: var(--iku-primary-dark);
    border-color: var(--iku-primary-dark);
}