header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 120px;
    padding: 0 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(42, 44, 45, 0.95);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.logo {
    width: 110px;
    height: auto;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: #fafafa;
    font-weight: 300;
    transition: 0.3s;
}

nav ul li a:hover {
    color: #9e9e9e;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fafafa;
    font-size: 24px;
    cursor: pointer;
    z-index: 1001;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    nav ul {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        height: 100vh;
        background-color: #2A2C2D;
        flex-direction: column;
        padding: 80px 20px;
        transition: left 0.3s;
    }
    
    nav ul.active {
        left: 0;
    }
    
    nav ul li {
        margin: 15px 0;
    }
}