.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: white;
    z-index: 1000;
    padding: 15px 0;
    transition: 0.3s;
}

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

.logo img {
    height: 45px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav a {
    font-size: 15px;
    transition: 0.3s;
}

.nav a:hover {
    color: #6f8fa8;
}

.burger {
    display: none;
    font-size: 28px;
    cursor: pointer;
}

#themeToggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
}

/* MOBILE */

@media(max-width: 900px){

    .burger {
        display: block;
    }

    .nav {
        position: absolute;
        top: 70px;
        right: 0;
        background: white;
        flex-direction: column;
        width: 200px;
        padding: 20px;
        display: none;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    }

    .nav.active {
        display: flex;
    }
}