added template and some styles for header elem

luckydiamond/src/assets/css/ElementsStyles/header.css

@@ -0,0 +1,26 @@
+.header {
+    margin-top: 4px;
+}
+
+.header__content {
+    display: flex;
+    align-items: center;
+    text-align: center;
+    justify-content: space-between;
+}
+
+.header__logo {
+    padding: 22px 0px 18px 36px;
+}
+
+.header__nav nav a {
+    margin-right: 75px;
+    text-decoration: none;
+}
+
+.header__nav--now {
+    color: #EF4444;
+    text-shadow: 0px 4px 4px rgba(0, 0, 0, 0.25);
+    font-size: 18px;
+    font-weight: 700;
+}