header {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    flex-shrink: 0;
}

.logo {
    max-width: 150px;
    height: auto;
}

.main-nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
}

.main-nav ul li {
    margin-left: 20px;
}

.main-nav ul li a {
    color: var(--secondary-color);
    text-decoration: none;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--secondary-color);
    margin: 5px 0;
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        display: none;
        padding: 20px;
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
    }

    .main-nav ul li {
        margin: 10px 0;
    }

    .main-nav ul li a {
        display: block;
        padding: 10px 0;
    }
}