header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: rgba(0, 0, 0, 0.9); 
    padding: 5px 10px; 
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    height: 50px; 
}


.logo-container {
    display: flex;
    align-items: center;
    gap: 5px; 
}

.logo {
    height: 30px; 
}

.brand-name {
    font-size: 16px; 
    color: white;
    font-weight: bold;
}


.nav-menu ul {
    list-style-type: none;
    display: flex;
    gap: 1rem; 
    padding: 0;
    margin: 0;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-size: clamp(0.8rem, 2vw, 1rem); 
    font-weight: normal;
    transition: color 0.3s, font-weight 0.3s;
    padding: 2px 5px; 
}

.nav-menu a:hover {
    color: #3498db;
    font-weight: bold;
}

.nav-menu a.active {
    color: rgb(240, 247, 244);
    font-weight: bold;
}


.menu-toggle {
    display: none; 
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-menu ul {
        display: none; 
        flex-direction: column; 
        background-color: rgba(0, 0, 0, 0.95); 
        position: absolute;
        top: 50px; 
        left: 0;
        width: 100%; 
        padding: 10px 0;
    }

    .nav-menu.show ul {
        display: flex; 
    }

    .menu-toggle {
        display: block; 
    }
}

@media (max-width: 480px) {
    header {
        height: 40px; 
        padding: 5px;
    }

    .logo {
        height: 25px; 
    }

    .brand-name {
        font-size: 14px; 
    }

    .nav-menu a {
        font-size: 0.8rem; 
    }
}