body {
    margin: 0;
}

.main_image_container {
    width: 100%;
    height: 70vh;
    background-size: cover;
}

.theme_dropdown {
    position: absolute;

    width: 8vmin;
    height: 10vmin;
    top: 1vmin;
    left: 1vmin;
}

.theme_dropdown button {
    padding: 0;
    border: none;
    background-size: cover;
    background-color: transparent;
}

.theme_button {
    width: 8vmin;
    height: 8vmin;
}

.theme_dropdown_content {
    display: none;

    width: 6vmin;
    height: 15vmin;

    justify-self: center;
    justify-content: left;
    flex-direction: column;
    align-items: center;

    gap: 1vmin;
}

.theme_dropdown_content button {
    width: 6vmin;
    height: 6vmin;
    
    cursor: pointer;
}

/* Showing the theme dropdown */
.theme_dropdown:hover .theme_dropdown_content {
    display: flex;
}

.language_dropdown {
    position: absolute;

    width: 10vmin;
    height: 6vmin;
    top: 1vmin;
    right: 1vmin;
}

.language_dropdown button {
    padding: 0;
    border: 0;
    background-size: cover;
}

.language_button {
    width: 10vmin;
    height: 6vmin;

    margin-bottom: 1vmin;
}

.language_dropdown_content {
    display: none;

    width: 7.5vmin;
    height: 20vmin;

    justify-self: center;
    justify-content: left;
    flex-direction: column;
    align-items: center;
    gap: 1vmin;
}

.language_dropdown_content button {
    width: 7.5vmin;
    height: 4.5vmin;
    
    cursor: pointer;
}

/* Showing the language dropdown */
.language_dropdown:hover .language_dropdown_content {
    display: flex;
}

.section_nav {
    padding: 0 0 10rem 0;
    border-top: 3px solid black;
    border-bottom: 3px solid black;
}

.section_nav h1 {
    font-size: 7rem;
    justify-self: center;
    
    margin: 0;
    padding: 3rem 0;
}

.nav_block_parent {
    display: flex;
    width: 90%;
    padding: 2rem 0;

    flex-wrap: wrap;

    justify-self: center;
    justify-content: space-evenly;
    align-items: center;

    gap: 1rem;
}

.nav_block {
    display: inline-block;
    
    width: 30rem;
    height: 30rem;
    
    border: 5px solid black;
    background-color: white;

    overflow: hidden;
}

.nav_image_background {
    width: 100%;
    height: 50%;
    background-size: cover;
}

.nav_image_background img {
    width: 100%;
    height: 100%
}

.nav_block a {
    display: block;
    justify-self: center;
    margin: 0;

    text-decoration: none;

    font-size: 4rem; 
}

.nav_block p {
    display: block;
    justify-self: center;
    margin: 0;
    text-align: center;
    font-size: 2rem; 
}

.section_nav h1 {
    font-size: 5rem;
    justify-self: center;
    
    margin: 0;
    padding: 3rem 0;
}

.section_usefull {
    padding: 0 0 10rem 0;
    border-bottom: 3px solid black;
}

.section_usefull h1 {
    font-size: 3rem;
    justify-self: center;
    
    margin: 0;
    padding: 2rem 0;

    font-family: Arial, Helvetica, sans-serif
}