:root {
    --primary-color: #1f2123 /*1b385b*/;
    --primary-color-hello: #8c99a8;
    --white-color: #ffffff;
    --background-light: #f5f5f7 /*f7f9fa*/;
    --background-darker: #EDF0F2;
    --grey-muted: #888888;
    --grey-regular: #aaaaaa;
    --grey-very-light: #cccccc;
    --primary-black: #1f2123;
    --default-border-radius: 7px;
    --default-icon-size: 30px;

	--default-font-family: "Noto Sans", system-ui, Helvetica, Verdana, sans-serif;
}  

html, body {
    padding: 0;
    margin: 0;
}

html {
    font-size: 112.5%;
}

body {
    font-family: var(--default-font-family);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--primary-black);
    background-color: var(--background-light);
}

h1, h2, h3, h4, h5, h6 {
    padding: 0;
    margin: 0;
    font-weight: 600;
}

a,a:hover,a:visited,a:active {
    color: var(--primary-color);
}

img {
    max-width: 100%;
    height: auto;
}

figure {
    margin-left: 0;
    margin-right: 0;
}

figcaption {
    color: var(--grey-regular);
    font-size: 0.8rem;
    text-align: center;
}

.clear {
    clear: both;
}

hr {
    width: 100%;
    text-align: center;
    border: none;
    border-top: 1px solid var(--grey-very-light);
}

/* Sections */
.header_content,
.language_selector_content {
    max-width: 600px;
    margin: 0 auto;
}

.main_content,
.home_section_a_content,
.home_section_b_content,
.home_section_c_content {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.footer_content {
    max-width: 600px;
    margin: 0 auto;
    padding: 0rem 1rem;
}

header {
    background-color: var(--background-light);
    color: var(--primary-color);
    position: sticky;
    top: 0;
    box-shadow: 0 5px 5px -5px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid #dae2e7;
    padding: 1rem;
}

.header_content {
    display: flex;
    justify-content: space-between;
}

.header_left {
    display: flex;
    align-items: center;
}

.header_left a {
    margin-right: 0.8rem;
	display: block;
}

.header_right {
    display: flex;
    align-items: center;
}

header a,
header a:hover,
header a:visited,
header a:active {
    color: var(--primary-color);
    font-size: 1.1rem;
    text-decoration: none;
    display: block;
    line-height: 1rem;
    font-weight: 500;
}

header a img {
    width: var(--default-icon-size);
    height: auto;
    border-radius: 2px;
}

.language_selector {
    background-color: var(--background-darker);
    color: var(--primary-color);
    position: sticky;
    top: 0;
    box-shadow: 0 5px 5px -5px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid #dae2e7;
    padding: 0.5rem 1rem;
}

.language_selector_content {
    /*display: flex;*/
}

.language_selector_content a {
    display: block;
    text-align: right;
    text-decoration: none;
    margin: 0.75rem 0;
}

.language_selector_content a img {
    width: 1.2rem;
    height: auto;
    border: 1px solid var(--grey-very-light);
}

.header_language_switcher img {
    border: 1px solid var(--grey-very-light);
}

main {
    background-color: var(--white-color);
    color: var(--primary-color);
}

.main_content {
    
}

a.home_section_cta {
    background-color: var(--primary-color);
    color: var(--white-color);
    border-radius: var(--default-border-radius);
    max-width: 250px;
    display: block;
    margin: 4rem auto 2rem auto;
    padding: 1rem;
    text-decoration: none;
    font-size: 1.2rem;

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

a.home_section_cta img {
    width: 1rem;
    height: auto;
    margin-left: 0.3rem;
}

.home_section_a {
    background-color: var(--white-color);
    color: var(--primary-color);
}

.home_section_a h1 {
    font-size: 2.1rem;
}

.home_section_a_hello {
    color: var(--primary-color-hello);
}

a.home_about_me_link {
    color: var(--primary-color-hello);
}

ul.home_section_a_expertise {
    list-style-type: none;
    padding: 0;
    margin: 1rem 0 0rem 0;
    font-size: 1.25rem;
}

.home_section_b {
    background-color: var(--background-light);
}

.home_section_b h1, 
.home_section_b h2, 
.home_section_b h3, 
.home_section_b h4, 
.home_section_b h5, 
.home_section_b h6 {
    color: var(--primary-color);
}

.home_section_b_content {

}

.home_section_b_content h2 {
    font-size: 2.2rem;
}

.home_section_b_card {
    margin: 2rem 0 2rem 0;
}

.home_section_b_project_screenshot img {
    border-radius: var(--default-border-radius);
}

.home_section_b_project_title {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin: 0.5rem 0;
    font-weight: 500;
}

.home_section_b_project_description {
    font-size: 0.9rem;
}

.home_section_c {
    background-color: var(--white-color);
}

.home_section_c h1, 
.home_section_c h2, 
.home_section_c h3, 
.home_section_c h4, 
.home_section_c h5, 
.home_section_c h6 {
    color: var(--primary-color);
}

.home_section_c_content {

}

.home_section_c_content h2 {
    font-size: 2.2rem;
}

.home_section_c_card {
    margin: 2rem 0 2rem 0;
}

.home_section_c_article_image img {
    border-radius: var(--default-border-radius);
}

.home_section_c_title {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin: 0.5rem 0;
    font-weight: 500;
}

.home_section_c_title a {
	text-decoration: none;
}

.home_section_c_date {
    color: var(--grey-very-light);
    font-size: 0.7rem;
    margin-bottom: 0.3rem;
}

.home_section_c_summary {
    font-size: 0.9rem;
}

footer {
    background-color: var(--background-light);
    color: var(--primary-color);
	padding: 2rem 0;
}

.footer_content hr {
    margin: 0;
}

footer .social {
    display: flex;
    justify-content: center;
}

.social_title {
    text-align: center;
    padding: 2rem 0  1.5rem 0;
}

.social_box {
    margin: 0 1rem;
    text-align: center;
    font-size: 0.6rem;
}

footer .social img {
    width: 32px;
    text-decoration: none;
}

footer .social a {
    text-decoration: none;
}