.nva {
    background: linear-gradient(to right, #8e9eab, #eef2f3);
    padding: 15px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nvalink {
    display: flex;
    justify-content: center;
    list-style: none;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btli {
    margin: 0 15px;
}

.btli a {
    color: #2c3e50;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 30px;
    transition: all 0.3s ease;
    position: relative;
}

.btli a:hover {
    background: rgba(255, 255, 255, 0.3);
    color: #e74c3c;
}

.btli a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 3px;
    background: #e74c3c;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.btli a:hover::after {
    width: 70%;
}