Add HSE design coursework and Wikimedium assignment

Flex_tiles/index.html

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+<!DOCTYPE html>
+<html lang="ru">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Flexbox</title>
+    <link rel="stylesheet" href="styles.css">
+</head>
+<body>
+    <div class="container row">
+        <div class="left column">
+            <div class="top row">
+                <div class="left-column column">
+                    <div class="box tall"></div>
+                    <div class="box"></div>
+                </div>
+
+                <div class="middle column">
+                    <div class="middle-top row">
+                        <div class="box"></div>
+                        <div class="box"></div>
+                    </div>
+                    <div class="box"></div>
+                </div>
+            </div>
+
+            <div class="bottom row">
+                <div class="box wide"></div>
+                <div class="box"></div>
+            </div>
+        </div>
+
+        <div class="right column">
+            <div class="box tall"></div>
+            <div class="box"></div>
+        </div>
+    </div>
+</body>
+</html>

Flex_tiles/styles.css

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+* {
+    box-sizing: border-box;
+}
+
+body {
+    margin: 0;
+    background-color: #222;
+}
+
+.row, .column {
+    display: flex;
+    gap: 10px;
+}
+
+.column {
+    flex-direction: column;
+}
+
+.container {
+    width: 850px;
+    height: 630px;
+    margin: 40px auto 0;
+    padding: 10px 20px;
+    background-color: black;
+}
+
+.left, .middle, .top {
+    flex: 1;
+}
+
+.left-column, .right {
+    width: 190px;
+}
+
+.middle-top, .bottom {
+    height: 170px;
+}
+
+.box {
+    flex: 1;
+    background-color: white;
+    border-radius: 10px;
+}
+
+.tall {
+    flex: none;
+    height: 280px;
+}
+
+.right .tall {
+    height: 310px;
+}
+
+.wide {
+    flex: 2;
+}