.nav-menu {
    background: #2c3e50;
    padding: 0;
    margin: 20px 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.nav-item {
    display: inline-block;
    margin: 0;
}

.nav-link {
    display: block;
    color: #ecf0f1;
    text-decoration: none;
    padding: 15px 20px;
    transition: all 0.3s ease;
    position: relative;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 16px;
}

.nav-link:hover {
    background-color: #34495e;
    color: #3498db;
}

.nav-link:focus {
    background-color: #34495e;
    outline: 2px solid #3498db;
    outline-offset: -2px;
}

.nav-link:active {
    background-color: #2c3e50;
    color: #2980b9;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: #3498db;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::before {
    width: 80%;
}