.header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;

    display: flex;
    justify-content: space-between;
    align-items: center;

    width: 100%;
    min-height: var(--header-height);

    padding-inline: var(--page-padding);

    background: transparent;

    transition:
        background var(--transition-normal),
        box-shadow var(--transition-normal);
}


.header.sticky {
    background: var(--bg-color);

    box-shadow:
        0 0.4rem 1.5rem rgba(0, 0, 0, 0.2);
}


.logo {
    position: relative;

    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-color);

    z-index: 101;
    flex-shrink: 0;
    white-space: nowrap;

}


.navbar {
    position: relative;

    display: flex;
    align-items: center;

    gap: var(--space-lg);
}


.navbar a {
    position: relative;

    font-size: 1.7rem;
    font-weight: 500;

    color: var(--text-color);

    transition:
        color var(--transition-normal);
}


.navbar a:hover,
.navbar a.active {
    color: var(--main-color);
}


#menu-icon {
    position: relative;
    z-index: 101;

    display: none;

    font-size: 3.6rem;
    color: var(--text-color);
}


/* Mobile navigation */

@media (max-width: 768px) {

    #menu-icon {
        display: inline-flex;

        justify-content: center;
        align-items: center;
    }


    .navbar {
        position: absolute;

        top: 100%;
        left: 0;

        display: flex;
        flex-direction: column;

        align-items: flex-start;

        gap: 0;

        width: 100%;

        padding:
            var(--space-sm)
            var(--page-padding)
            var(--space-md);

        background:
            var(--bg-color);

        box-shadow:
            0 1rem 2rem rgba(0, 0, 0, 0.2);

        transform:
            translateY(-1rem);

        opacity: 0;
        visibility: hidden;

        pointer-events: none;

        transition:
            transform var(--transition-normal),
            opacity var(--transition-normal),
            visibility var(--transition-normal);
    }


    .navbar.active {
        transform:
            translateY(0);

        opacity: 1;
        visibility: visible;

        pointer-events: auto;
    }


    .navbar a {
        width: 100%;

        padding-block:
            var(--space-sm);

        font-size: 2rem;
    }
}