.iuh__tamnhin {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.d-none {
    display: none !important;
}

.iuh__tamnhin-title {
    text-align: center;
    color: #012a6c;
    font-size: 1.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.iuh__tamnhin-grid {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 2rem;
}

.iuh__tamnhin-sidebar {
    background: #f9fafb;
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.iuh__tamnhin-sidebar-title {
    font-weight: 600;
    color: #0a3161;
    margin-bottom: 1rem;
}

.iuh__tamnhin-menu {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.iuh__tamnhin-btn {
    background: #ffffff;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    padding: 0.6rem 1rem;
    font-weight: 600;
    text-align: left;
    color: #0a3161;
    transition: all 0.3s ease;
}

    .iuh__tamnhin-btn:hover,
    .iuh__tamnhin-btn.active {
        background: #fde68a;
        color: #012a6c;
        border-color: #facc15;
    }

.iuh__tamnhin-content {
    background: #ffffff;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.08);
}

.iuh__tamnhin-heading {
    color: #0a3161;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    border-bottom: 2px solid #facc15;
    display: inline-block;
}

.iuh__tamnhin-image img {
    max-width: 250px;
    height: auto;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.iuh__tamnhin-section ul {
    margin-left: 1.25rem;
    line-height: 1.7;
}

.iuh__tamnhin-section li {
    margin-bottom: 0.4rem;
}

@media (max-width: 768px) {
    .iuh__tamnhin-grid {
        grid-template-columns: 1fr;
    }

    .iuh__tamnhin-sidebar {
        order: 1;
    }

    .iuh__tamnhin-content {
        order: 2;
    }

    .iuh__tamnhin-btn {
        font-size: 0.9rem;
    }

    .iuh__tamnhin-heading {
        font-size: 1.25rem;
    }
}