header {
    position: sticky;
    top: 0;
    z-index: 10;
    transition: var(--time-5);
}

header[data-is-displayed-when-scrolling] {
    transition: var(--time-5);
}

header[data-is-displayed-when-scrolling="false"] {
    transform: translateY(-100%);
}

header[data-is-displayed-when-scrolling="true"] {
    transform: translateY(0%);
    box-shadow: 0 0 var(--size-2) 0 var(--black-opacity-20);
}

#informational-header {
    position: sticky;
    top: 0;
    z-index: 3;
    width: var(--size-full);
    height: calc(var(--size-half) * 1.5);
    padding: 0 var(--space-6);
    background-color: var(--white-opacity-90);
    border-bottom: 1px solid var(--neutral-2);
    box-shadow: 0 0 var(--size-4) 0 var(--black-opacity-5);
    backdrop-filter: blur(var(--size-10));
}

#header-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--size-3);
    height: auto;
    padding: var(--space-1);
}

#header-logo img {
    width: 100%;
    transition: var(--time-3);
}

#header-logo:hover img {
    scale: 0.95;
}

#contact-container {
    gap: var(--space-2);
    font-style: italic;
}

.contact-item {
    gap: var(--space-1);
    font-size: var(--font-size-2);
}

.contact-label {
    gap: var(--space-2);
}

#informational-menu {
    width: var(--size-fit);
}

#informational-menu > a {
    position: relative;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-3);
    text-decoration: none;
    color: inherit;
    display: inline-block;
    transition: var(--time-3);
}

#informational-menu > a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    height: 2px;
    width: 0;
    background-color: var(--accent-1);
    transition: var(--time-3);
}

#informational-menu > a:hover::after {
    left: 0;
    width: 100%;
}

#language-selection {
    gap: var(--space-2);
    color: var(--neutral-5);
}

.switch-language-button {
    cursor: pointer;
    transition: var(--time-3);
}

[data-selected-language="true"] {
    color: var(--neutral-4);
}

[data-selected-language="false"] {
    color: var(--neutral-3);
    transition: var(--time-3);
}

[data-selected-language="false"]:hover {
    color: var(--neutral-4);
}

#catalog-header {
    width: 100%;
    height: calc(var(--size-half));
    color: var(--neutral-0);
    background-color: var(--white-opacity-80);
    border-bottom: 1px solid var(--neutral-2);
    backdrop-filter: blur(var(--size-8));
}

#catalog-menu {
    position: relative;
    justify-content: space-evenly;
    width: 100%;
    height: 100%;
}

.category-link {
    display: flex;
    align-items: center;
    position: relative;
    width: var(--size-full);
    height: 100%;
    padding: 0 var(--space-4);
    font-size: var(--font-size-3);
    font-weight: 500;
    text-wrap: nowrap;
    text-align: center;
    color: var(--neutral-5);
    transition: var(--time-3);
    justify-content: center;
}

.category-link[href*="/all/"] {
    color: var(--accent-2);
}

.category-link[href*="/all/"]::after {
    background-color: var(--accent-2);
}

.category-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    height: 2px;
    width: 0;
    background-color: var(--accent-1);
    transition: var(--time-3);
}

.category-link:hover::after {
    left: 0;
    width: 100%;
}

#mobile-menu-opener {
    display: none;
}

#mobile-menu {
    display: none;
}

@media (max-width: 1024px) {
    header {
        height: calc(var(--size-3) * 1.5);
    }

    #informational-header {
        height: var(--size-full);
    }

    #informational-menu,
    #language-selection,
    #catalog-header {
        display: none;
    }

    #mobile-menu-opener {
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 45px;
        height: 45px;
    }

    #line-container {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        display: flex;
        flex-direction: column;
        gap: 4px;
        width: 100%;
        height: fit-content;
        padding: var(--space-1);
    }

    .line {
        display: flex;
        width: 100%;
        height: 2px;
        background-color: var(--neutral-5);
        transition: var(--time-4);
    }

    #mobile-menu-opener[data-open] #line-1 {
        transform: rotate(45deg) translateY(4px);
    }

    #mobile-menu-opener[data-open] #line-2 {
        transform: rotate(-45deg) translateY(-4px);
    }

    #mobile-language-selection {
        gap: var(--space-2);
        padding: calc(var(--size-2) * 1.5);
        border-top: 1px solid var(--neutral-2);
    }

    .switch-language-button {
        cursor: pointer;
    }

    #mobile-menu {
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%);
        z-index: 100;
        width: 100vw;
        display: none;
        justify-content: space-between;
        overflow: auto;
        height: calc(100vh - var(--size-3) * 1.5);
        background-color: var(--neutral-0);
        box-shadow: 0 0 var(--size-4) 0 var(--black-opacity-5);
    }

    #mobile-menu[data-open] {
        display: flex;
        justify-content: space-between;
        animation: slideFadeIn calc(var(--time-3) * 2);
    }

    #mobile-menu[data-closing] {
        display: flex;
        animation: slideFadeOut calc(var(--time-3) * 2);    
    }

    #mobile-navigation {
        gap: var(--space-5);
        overflow: auto;
        padding: var(--space-5);
    }

    #mobile-navigation .separator {
        background-color: var(--neutral-2);
    }

    #mobile-navigation nav a {
        padding: var(--space-3);
        font-size: var(--font-size-5);
        border-radius: var(--rounding-1);
        transition: var(--time-3);
    }

    #mobile-navigation nav a:hover {
        background-color: var(--neutral-1);
        padding-left: var(--space-4);
    }

    @keyframes slideFadeIn {
        from {
            opacity: 0;
            transform: translate(-125%, 10%) rotate(-10deg);
        }
        to {
            opacity: 1;
            transform: translate(-50%, 0%) rotate(0deg);
        }
    }

    @keyframes slideFadeOut {
        from {
            opacity: 1;
            transform: translate(-50%, 0%) rotate(0deg);
        }
        to {
            opacity: 0;
            transform: translate(-125%, 10%) rotate(-10deg);
        }
    }
}

@media (max-width: 425px) {
    header {
        height: calc(var(--size-3) * 1.8);
    }

    #mobile-menu-opener {
        width: 35px;
        height: 35px;
    }

    #mobile-menu {
        height: calc(100vh - var(--size-3) * 1.8);
    }

    #mobile-navigation nav a {
        font-size: var(--font-size-6);
    }

    #mobile-language-selection {
        gap: var(--space-3);
    }

    #mobile-language-selection .separator.vertical {
        min-height: calc(var(--size-1) * 1.5);
    }

    .switch-language-button {
        font-size: var(--font-size-5);
    }
}