diff --git a/src/pages/app.scss b/src/pages/app.scss
index 1920419..bedd0a6 100644
--- a/src/pages/app.scss
+++ b/src/pages/app.scss
@@ -1,7 +1,163 @@
 body {
-    background-color: white;
-
+    background-color: $color-white;
     width: 100%;
-
     font-family: $font-family-Roboto;
 }
+
+.main {
+    padding: 29px 100px 70px 100px;
+
+    @media (max-width: 1024px) {
+        padding: 29px 16px 70px 16px;
+    }
+
+    .article-name {
+        display: flex;
+        gap: 8px;
+
+        @media (min-width: 2500px) {
+            gap: 8.75px;
+
+            img.icon-home {
+                width: 31.25px;
+            }
+
+            img.icon-arrow-right {
+                width: 15.62px;
+            }
+        }
+
+        h5.article-name-title {
+            font-family: $font-family-Roboto;
+            font-weight: 400;
+            font-size: 12px;
+            line-height: 14px;
+            text-transform: uppercase;
+            color: $color-gray-600;
+
+            @media (min-width: 2500px) {
+                font-size: 24px;
+                line-height: 28px;
+            }
+        }
+    }
+
+    h1.article-title {
+        font-family: $font-family-Roboto;
+        font-weight: 400;
+        font-size: 24px;
+        line-height: 28px;
+        letter-spacing: 0.1em;
+        text-transform: uppercase;
+        text-align: center;
+        color: $color-gray-200;
+        margin: 80px 0;
+
+        @media (max-width: 1024px) {
+            margin: 80px 0 40px 0;
+        }
+
+        @media (min-width: 2500px) {
+            font-size: 48px;
+            line-height: 56px;
+        }
+    }
+
+    article.article-container {
+        display: flex;
+        gap: 30px;
+
+        @media (max-width: 1024px) {
+            flex-direction: column;
+        }
+
+        ul.sections-list {
+            border-right: 1px solid $color-black;
+            width: 28.094%;
+
+            @media (max-width: 1024px) {
+                width: 100%;
+                border-right: none;
+            }
+
+            @media (min-width: 2500px) {
+                width: 25.6523%;
+            }
+
+            li {
+                font-family: $font-family-Roboto;
+                color: $color-gray-350;
+                font-weight: 400;
+                font-size: 16px;
+                line-height: 19px;
+                padding: 10px 0 10px 16px;
+
+                @media (min-width: 2500px) {
+                    font-size: 32px;
+                    line-height: 38px;
+                }
+            }
+
+            li.active {
+                color: $color-white;
+                background-color: $color-black;
+                font-weight: 700;
+            }
+        }
+
+        section {
+            display: none;
+        }
+
+        section.active {
+            display: block;
+            width: 69.26%;
+            margin-bottom: 11px;
+
+            @media (max-width: 1024px) {
+                width: 100%;
+            }
+
+            @media (min-width: 2500px) {
+                width: 73.044%;
+            }
+
+            h2.section-title {
+                font-family: $font-family-Roboto;
+                font-weight: 700;
+                font-size: 24px;
+                line-height: 28px;
+                margin-bottom: 12px;
+                color: $color-gray-200;
+
+                @media (max-width: 1024px) {
+                    text-align: center;
+                }
+
+                @media (min-width: 2500px) {
+                    font-size: 48px;
+                    line-height: 56px;
+                }
+            }
+
+            .section-description p {
+                font-family: $font-family-Roboto;
+                font-weight: 400;
+                font-size: 13px;
+                line-height: 15px;
+                color: $color-gray-350;
+
+                @media (max-width: 1024px) {
+                    font-size: 12px;
+                    line-height: 18px;
+                    text-align: justify;
+                }
+
+                @media (min-width: 2500px) {
+                    font-size: 26px;
+                    line-height: 30px;
+                }
+            }
+        }
+    }
+}