The page about the project has been revived.

app/application/resources/site/js/_choose-language.js

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+let blockLanguage = document.querySelector('#language');
+blockLanguage.querySelector('.language__button').addEventListener('click', (e) => {
+    if (blockLanguage.classList.contains('active')) {
+        blockLanguage.classList.remove('active');
+    } else {
+        blockLanguage.classList.add('active');
+    }
+});

app/application/resources/site/js/_menu.js

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+let body = document.querySelector('body');
+document.querySelector('#mobile-menu').addEventListener('click', (e) => {
+    if (body.classList.contains('mobile-menu-open')) {
+        body.classList.remove('mobile-menu-open');
+    } else {
+        body.classList.add('mobile-menu-open');
+    }
+});

app/application/resources/site/js/app.js

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+import './_menu.js';
+import './_choose-language.js';

app/application/resources/site/scss/app.scss

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+@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,400;0,700;1,400;1,700&display=swap');
+@import "reset";
+
+html,
+body {
+    height: 100%;
+}
+
+body {
+    font-family: "Roboto", sans-serif;
+    margin: 0;
+}
+
+.wrapper {
+    display: flex;
+    flex-direction: column;
+    min-height: 100%;
+
+    .main-container {
+        flex: 1 0 auto;
+    }
+
+    .section-container {
+        display: flex;
+        flex: 1 0 auto;
+        min-height: 100%;
+        flex-direction: column;
+
+        .content {
+            flex: 1 0 auto;
+        }
+
+        .footer {
+            flex: 0 0 auto;
+        }
+    }
+}
+
+.header {
+    display: grid;
+    grid-template-rows: 1fr;
+    grid-template-columns: 1fr 1fr;
+    grid-template-areas:
+        "logo menu"
+        "language language";
+    padding: 8px;
+    box-shadow: 0 3px 9px rgba(0,0,0,0.48);
+    background: #eee;
+}
+.header_logo {
+    grid-area: logo;
+    max-height: 50px;
+
+    a {
+        text-decoration: none;
+    }
+
+    img {
+        max-height: 100%;
+    }
+
+    strong {
+        color: #0a0e17;
+        font-size: 20px;
+        display: inline-block;
+        vertical-align: middle;
+        padding: 5px 10px;
+        border: 1px solid #0a0e17;
+        border-radius: 4px;
+    }
+}
+#mobile-menu {
+    grid-area: menu;
+    border: 0;
+    background: none;
+    color: #FF2D20;
+    margin-left: auto;
+    cursor: pointer;
+    position: relative;
+    z-index: 10;
+
+    .open {
+        display: block;
+    }
+
+    .close {
+        display: none;
+        margin-top: -5px;
+    }
+}
+#menu {
+    display: none;
+
+    ul {
+        padding: 10px 0 0 20px;
+        margin: 0;
+        list-style: none;
+    }
+
+    a {
+        display: block;
+        text-decoration: none;
+        font-size: 16px;
+        padding-top: 10px;
+        padding-bottom: 10px;
+        color: #0a0e17;
+    }
+
+    a.active {
+        font-weight: bold;
+    }
+}
+.menu__title {
+    background: #ccc;
+    font-size: 24px;
+    font-weight: bold;
+    padding: 12px 0 12px 20px;
+    box-shadow: 0 3px 9px rgba(0,0,0,0.48);
+}
+body.mobile-menu-open {
+    #mobile-menu {
+        .open {
+            display: none;
+        }
+
+        .close {
+            display: block;
+        }
+    }
+    #menu {
+        background: #ddd;
+        display: block;
+        position: fixed;
+        left: 0;
+        top: 0;
+        overflow: auto;
+        width: 100%;
+        height: 100%;
+    }
+}
+#language {
+    grid-area: language;
+    margin-top: 10px;
+}
+.language__block {
+    position: relative;
+}
+.language__button {
+    border: 0;
+    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.48);
+    background: #ccc;
+    width: 100%;
+    cursor: pointer;
+    font-size: 18px;
+    position: relative;
+    padding: 10px;
+    border-radius: 5px;
+    color: #000;
+}
+.language__button__str {
+    position: absolute;
+    top: calc(50% - 8px);
+    right: 10px;
+}
+.language__list {
+    background: #ddd;
+    display: none;
+    position: absolute;
+    top: 100%;
+    left: 0;
+    width: 100%;
+    list-style: none;
+    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.48);
+    padding: 10px 0;
+    margin: 0;
+    border-radius: 0 0 5px 5px;
+
+    a {
+        text-decoration: none;
+        color: #000;
+        font-size: 16px;
+        display: block;
+        padding: 10px 20px;
+    }
+}
+#language.active {
+    .language__list {
+        display: block;
+    }
+    .language__button {
+        border-radius: 5px 5px 0 0;
+    }
+}
+.main-container {
+    display: flex;
+    flex-direction: column;
+}
+.content {
+    padding-left: 20px;
+    padding-right: 20px;
+    margin-bottom: 20px;
+
+    h1 {
+        font-size: 24px;
+        font-weight: bold;
+        padding-bottom: 10px;
+        margin-bottom: 10px;
+        border-bottom: 1px solid #eee;
+    }
+}
+
+.footer {
+    background-color: #eee;
+    padding: 15px 0 15px 15px;
+    box-shadow: 5px 0px 5px rgba(0,0,0,0.48);
+
+    a {
+        text-decoration: none;
+        color: #0a0e17;
+        font-size: 18px;
+        font-weight: bold;
+    }
+}
+
+@media (min-width: 1000px) {
+    body {
+        max-width: 1400px;
+        margin: 0 auto;
+    }
+    .header {
+        grid-template-areas: "logo language";
+        grid-template-columns: 1fr 200px;
+    }
+    #mobile-menu {
+        display: none;
+    }
+    .main-container {
+        flex-direction: row;
+    }
+    .language__button {
+        padding: 7px 10px 7px 0;
+    }
+    #menu {
+        background: #eee;
+        display: block;
+        width: 175px;
+        box-shadow: 0px 7px 8px rgba(0,0,0,0.48);
+    }
+    .menu__title {
+        display: none;
+    }
+}

app/application/resources/site/scss/reset.scss

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+/* Box sizing rules */
+*,
+*::before,
+*::after {
+    box-sizing: border-box;
+}
+
+/* Prevent font size inflation */
+html {
+    -moz-text-size-adjust: none;
+    -webkit-text-size-adjust: none;
+    text-size-adjust: none;
+}
+
+/* Remove default margin in favour of better control in authored CSS */
+body, h1, h2, h3, h4, p,
+figure, blockquote, dl, dd {
+    margin-block-end: 0;
+}
+
+/* Remove list styles on ul, ol elements with a list role, which suggests default styling will be removed */
+ul[role='list'],
+ol[role='list'] {
+    list-style: none;
+}
+
+/* Set core body defaults */
+body {
+    min-height: 100vh;
+    line-height: 1.5;
+}
+
+/* Set shorter line heights on headings and interactive elements */
+h1, h2, h3, h4,
+button, input, label {
+    line-height: 1.1;
+}
+
+/* Balance text wrapping on headings */
+h1, h2,
+h3, h4 {
+    text-wrap: balance;
+}
+
+/* A elements that don't have a class get default styles */
+a:not([class]) {
+    text-decoration-skip-ink: auto;
+    color: currentColor;
+}
+
+/* Make images easier to work with */
+img,
+picture {
+    max-width: 100%;
+    display: block;
+}
+
+/* Inherit fonts for inputs and buttons */
+input, button,
+textarea, select {
+    font-family: inherit;
+    font-size: inherit;
+}
+
+/* Make sure textareas without a rows attribute are not tiny */
+textarea:not([rows]) {
+    min-height: 10em;
+}
+
+/* Anything that has been anchored to should have extra scroll margin */
+:target {
+    scroll-margin-block: 5ex;
+}