diff --git a/public/css/common.css b/public/css/common.css
index edd6198..699f8c8 100644
--- a/public/css/common.css
+++ b/public/css/common.css
@@ -12,7 +12,7 @@
   --color-text: #e8e8e4;
   --color-text-light: #c7c7c2;
   --color-border: #3a3f3c;
-  --color-bg-overlay: rgba(46, 47, 66, 0.4);
+  --color-bg-overlay: rgba(6, 6, 27, 0.4);
 }
 
 .theme-light {
diff --git a/public/css/components.css b/public/css/components.css
index d73a96e..410d986 100644
--- a/public/css/components.css
+++ b/public/css/components.css
@@ -1,3 +1,333 @@
+/* #region header */
+
+header {
+  border-bottom: 1px solid var(--color-border);
+}
+
+header .container {
+  padding: 15px 0;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.header-nav {
+  display: none;
+}
+
+.header-buttons-container {
+  display: flex;
+  gap: 10px;
+}
+
+.header-logo img {
+  width: 60px;
+  height: 55px;
+}
+
+.header-btn-menu {
+  display: flex;
+  align-items: center;
+  border: transparent;
+  background: transparent;
+  padding: 0;
+}
+
+.header-icon-menu {
+  stroke: var(--color-primary-light);
+  stroke-width: 2px;
+  transition: stroke var(--transition);
+}
+
+.header-icon-menu:focus,
+.header-icon-menu:active,
+.header-icon-menu:hover {
+  stroke: var(--color-primary);
+}
+/* #endregion */
+
+/* #region toggle mode */
+.mode-btn {
+  width: 48px;
+  height: 28px;
+  border-radius: 50px;
+  background: var(--color-border);
+  position: relative;
+  cursor: pointer;
+  border: none;
+  transition: background var(--transition);
+}
+
+.mode-btn::after {
+  content: '';
+  position: absolute;
+  top: 3px;
+  left: 3px;
+  width: 22px;
+  height: 22px;
+  border-radius: 50%;
+  background: var(--color-primary);
+  transition:
+    transform var(--transition),
+    background var(--transition);
+}
+
+.theme-light .mode-btn {
+  background: var(--color-border);
+}
+
+.theme-light .mode-btn::after {
+  transform: translateX(20px);
+}
+/* #endregion */
+
+/* #region mobile menu */
+.mob-menu {
+  position: fixed;
+  top: 0;
+  width: 100vw;
+  height: 100%;
+  min-width: 375px;
+  padding: 20px;
+  background: var(--color-surface);
+  z-index: 999999;
+  transition:
+    opacity var(--transition),
+    visibility var(--transition);
+
+  opacity: 0;
+  pointer-events: none;
+  visibility: hidden;
+}
+
+.mob-menu-container {
+  position: relative;
+  height: 100vh;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+
+.close-btn-menu,
+.close-btn {
+  border: transparent;
+  background: transparent;
+  position: absolute;
+  stroke: var(--color-text-light);
+  display: block;
+  top: 20px;
+  right: 20px;
+  transition: stroke var(--transition);
+}
+
+.close-btn-menu:focus,
+.close-btn-menu:active,
+.close-btn-menu:hover,
+.close-btn:focus,
+.close-btn:active,
+.close-btn:hover {
+  stroke: var(--color-primary);
+}
+
+.mob-menu-nav {
+  margin: 0 auto;
+}
+
+.mob-nav-list-item:not(:last-child) {
+  margin-bottom: 24px;
+}
+
+.mob-nav-list-link {
+  line-height: 1.14;
+  letter-spacing: -0.02em;
+  color: var(--color-primary-light);
+  transition: color var(--transition);
+}
+
+.mob-nav-list-link:focus,
+.mob-nav-list-link:active,
+.mob-nav-list-link:hover {
+  color: var(--color-primary);
+}
+
+.is-open-menu {
+  opacity: 1;
+  visibility: visible;
+  pointer-events: auto;
+}
+/* #endregion */
+
+/* #region sections paddings, h2 */
+.hero,
+.cohort,
+.discover,
+.favorites {
+  padding-top: 20px;
+  padding-bottom: 20px;
+}
+
+h2 {
+  font-size: 24px;
+  font-weight: 600;
+  text-align: center;
+  margin: 0 auto;
+  color: var(--color-primary);
+  margin-bottom: 20px;
+}
+/* #endregion */
+
+/* #region section hero */
+
+.hero h1 {
+  color: var(--color-primary);
+  text-align: center;
+  font-weight: bold;
+  font-size: 28px;
+  margin-bottom: 20px;
+}
+
+.hero img {
+  margin: 0 auto;
+  margin-bottom: 20px;
+  border-radius: 15px;
+  width: 300px;
+}
+
+.hero p {
+  font-size: 18px;
+  line-height: 1.6;
+  letter-spacing: 0.3px;
+  text-align: justify;
+  font-style: italic;
+}
+/* #endregion */
+
+/* #region universal styles for dynamic list and items with recipes */
+.cohort-list,
+.discover-list,
+.favorites-list {
+  display: grid;
+  gap: 20px;
+  grid-template-columns: 1fr;
+  margin-top: 20px;
+}
+
+.recipe-list-card {
+  background: var(--color-surface);
+  border-radius: 12px;
+  padding: 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  transition:
+    transform var(--transition),
+    box-shadow var(--transition);
+  cursor: pointer;
+  border: 1px solid var(--color-border);
+}
+
+.recipe-list-card:hover,
+.recipe-list-card:focus {
+  transform: translateY(-4px);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+}
+
+.recipe-list-img {
+  width: 100%;
+  height: 180px;
+  object-fit: cover;
+  border-radius: 10px;
+  margin-top: auto;
+}
+
+.recipe-list-card h3 {
+  font-size: 18px;
+  color: var(--color-text);
+  font-family: var(--font-header);
+  margin: 0;
+  max-width: 280px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+/* #endregion */
+
+/* #region common styles for inputs and search buttons */
+/* container for input and button */
+.discover-search-form,
+.chat-form {
+  background: var(--color-surface);
+  padding: 20px;
+  border-radius: 12px;
+  border: 1px solid var(--color-border);
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  margin: 0 auto;
+}
+
+/* labels and inputs */
+.discover-search-form label {
+  font-size: 16px;
+  color: var(--color-text-light);
+  display: block;
+}
+
+.discover-dish-input,
+.chat-input {
+  width: 100%;
+  padding: 10px 14px;
+  border-radius: 8px;
+  border: 1px solid var(--color-border);
+  background: var(--color-bg);
+  color: var(--color-text);
+  font-size: 16px;
+  transition:
+    border-color var(--transition),
+    background var(--transition);
+}
+
+.discover-dish-input:focus,
+.chat-input:focus,
+.discover-dish-input:hover,
+.chat-input:hover,
+.discover-dish-input:active,
+.chat-input:active {
+  border-color: var(--color-primary);
+  outline: none;
+  background: var(--color-surface);
+}
+
+/* search button */
+
+.discover-dish-btn,
+.chat-btn {
+  margin: 0 auto;
+  display: block;
+  padding: 12px 40px;
+  font-size: 16px;
+  font-weight: 600;
+  border: transparent;
+  background: var(--color-primary);
+  color: var(--color-bg);
+  border-radius: 15px;
+
+  transition:
+    background var(--transition),
+    box-shadow var(--transition),
+    transform var(--transition);
+}
+
+.discover-dish-btn:hover,
+.chat-btn:hover {
+  background: var(--color-primary-light);
+  transform: scale(1.1);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
+}
+/* #endregion */
+
+/* #region modal-window */
+
 .modal-overlay {
   position: fixed;
   top: 0;
@@ -19,6 +349,7 @@
 
 .no-scroll {
   height: 100vh;
+  overflow: hidden;
 }
 
 .modal {
@@ -26,27 +357,394 @@
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
-  border-radius: 15px;
-  width: 400px;
-  min-height: 600px;
-  max-height: 90vh;
+  border-radius: 16px;
+  width: 335px;
+  height: 90%;
   overflow-y: auto;
-  padding: 32px 24px;
+  padding: 60px 20px 20px;
   background: var(--color-bg);
+  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
+  scrollbar-width: thin;
+  scrollbar-color: var(--color-primary) var(--color-surface);
+}
+
+/* modal scroll settings */
+
+.modal::-webkit-scrollbar {
+  width: 6px;
+}
+
+.modal::-webkit-scrollbar-track {
+  background: var(--color-surface);
+  border-radius: 10px;
+}
+
+.modal::-webkit-scrollbar-thumb {
+  background: var(--color-primary);
+  border-radius: 10px;
+}
+
+.modal::-webkit-scrollbar-thumb:hover {
+  background: var(--color-primary-light);
 }
 
 .close-btn {
   position: absolute;
-  top: 24px;
-  right: 24px;
+  top: 15px;
+  right: 15px;
   padding: 0;
   border: none;
   background: transparent;
+  color: var(--color-text-light);
+  cursor: pointer;
+  transition: color var(--transition);
 }
 
+.close-btn:hover {
+  color: var(--color-primary);
+}
+
+/* ===== Dynamic content modal ===== */
+.recipe-card-container {
+  text-align: center;
+  margin: 0 auto;
+}
+
+/* category, country, author */
+.recipe-card-category,
+.recipe-card-area,
+.recipe-card-author {
+  display: inline-block;
+  background: var(--color-primary-light);
+  color: var(--color-bg);
+  padding: 4px 10px;
+  border-radius: 8px;
+  font-size: 14px;
+  font-weight: 500;
+  text-align: center;
+  margin-right: 10px;
+  margin-bottom: 10px;
+}
+
+/* image */
+.recipe-card-img {
+  width: 100%;
+  height: auto;
+  border-radius: 12px;
+  object-fit: cover;
+  margin-bottom: 15px;
+  margin-top: 5px;
+}
+
+/* tags */
+.recipe-card-tags {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  padding: 0;
+  list-style: none;
+  margin-bottom: 15px;
+}
+
+.recipe-card-tag {
+  background: var(--color-text-light);
+  color: var(--color-bg);
+  padding: 4px 10px;
+  border-radius: 8px;
+  font-size: 14px;
+}
+
+/* ingredients */
+.recipe-card-ingredients {
+  padding: 0;
+  display: grid;
+  grid-template-columns: 1fr;
+  gap: 8px;
+  margin-bottom: 15px;
+}
+
+.container-ingredient {
+  display: flex;
+  justify-content: space-between;
+  background: var(--color-border);
+  padding: 6px 10px;
+  border-radius: 6px;
+  font-size: 15px;
+}
+
+/* instructions */
+.recipe-card-instructions {
+  line-height: 1.6;
+  font-size: 16px;
+  white-space: pre-line;
+  text-align: justify;
+  margin-bottom: 15px;
+}
+
+/* video */
 .recipe-card-video {
   width: 100%;
-  height: 250px;
+  aspect-ratio: 16 / 9;
   border: none;
   border-radius: 10px;
+  margin-bottom: 15px;
+}
+
+/* save-btn */
+.recipe-save-btn {
+  margin: 0 auto;
+  display: block;
+  max-width: max-content;
+  padding: 12px 20px;
+  font-size: 16px;
+  font-weight: 600;
+  border: transparent;
+  background: var(--color-primary);
+  color: var(--color-bg);
+  border-radius: 15px;
+
+  transition:
+    background var(--transition),
+    box-shadow var(--transition),
+    transform var(--transition);
+}
+
+.recipe-save-btn:focus,
+.recipe-save-btn:active,
+.recipe-save-btn:hover {
+  background: var(--color-primary-light);
+  transform: scale(1.1);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
+}
+
+/* #endregion */
+
+/* #region footer */
+footer {
+  border-top: 1px solid var(--color-border);
+  padding: 30px 0;
+  font-size: 16px;
+}
+
+.footer-text {
+  color: var(--color-text-light);
+  margin: 0;
+  margin-bottom: 10px;
+}
+.footer-address {
+  color: var(--color-primary);
+  text-decoration: none;
+  transition: color var(--transition);
+}
+
+.footer-address:hover {
+  color: var(--color-primary-light);
+}
+
+/* #endregion */
+
+@media screen and (min-width: 768px) {
+  h2 {
+    font-size: 30px;
+    margin-bottom: 30px;
+  }
+
+  /* sections paddings */
+  .hero,
+  .cohort,
+  .discover,
+  .favorites {
+    padding-top: 30px;
+    padding-bottom: 30px;
+  }
+
+  /* universal styles for dynamic list and items with recipes */
+  .cohort-list,
+  .discover-list,
+  .favorites-list {
+    grid-template-columns: repeat(2, 1fr);
+  }
+
+  /* common styles for inputs and search buttons  */
+  .discover-search-form,
+  .chat-form {
+    width: 400px;
+    padding: 30px;
+  }
+
+  /* #region header*/
+  .header-nav {
+    display: flex;
+  }
+
+  .nav-list {
+    display: flex;
+    flex-direction: row;
+    align-items: center;
+    gap: 20px;
+    font-size: 20px;
+    font-weight: 500;
+    line-height: 1.14;
+    letter-spacing: -0.02em;
+  }
+
+  .nav-list li {
+    color: var(--color-text-light);
+    transition: color var(--transition);
+  }
+
+  .nav-list li:hover,
+  .nav-list li:focus,
+  .nav-list li:active {
+    color: var(--color-primary);
+  }
+
+  .header-logo img {
+    width: 80px;
+    height: 75px;
+  }
+
+  .header-btn-menu {
+    display: none;
+  }
+  /* #endregion */
+
+  /* #region section hero */
+  .hero {
+    padding-top: 30px;
+    padding-bottom: 30px;
+  }
+
+  .hero h1 {
+    font-size: 36px;
+  }
+
+  .hero-info {
+    margin-top: 30px;
+    display: flex;
+    gap: 30px;
+    align-items: center;
+  }
+
+  .hero img {
+    margin-bottom: 0px;
+  }
+
+  .hero p {
+    font-size: 18px;
+    line-height: 1.8;
+    letter-spacing: 0.4px;
+  }
+  /* #endregion */
+
+  /* #region modal-window */
+
+  .modal {
+    width: 650px;
+    padding: 60px 30px 30px;
+  }
+
+  .close-btn {
+    top: 30px;
+    right: 30px;
+  }
+
+  /* ===== Dynamic content modal ===== */
+  /* category, country, author */
+  .recipe-card-category,
+  .recipe-card-area,
+  .recipe-card-author {
+    padding: 6px 12px;
+    border-radius: 10px;
+    font-size: 16px;
+    margin-right: 15px;
+    margin-bottom: 15px;
+  }
+
+  /* image */
+  .recipe-card-img {
+    width: 100%;
+    aspect-ratio: 4 / 3;
+    margin-bottom: 20px;
+  }
+
+  /* tags */
+  .recipe-card-tags {
+    gap: 15px;
+    padding: 0;
+    list-style: none;
+    margin-bottom: 20px;
+  }
+
+  .recipe-card-tag {
+    padding: 6px 12px;
+    font-size: 16px;
+  }
+
+  /* ingredients */
+  .recipe-card-ingredients {
+    grid-template-columns: 2fr 2fr;
+    gap: 8px 16px;
+    margin-bottom: 20px;
+  }
+
+  .container-ingredient {
+    padding: 6px 16px;
+    border-radius: 6px;
+    font-size: 16px;
+  }
+
+  /* instructions */
+  .recipe-card-instructions {
+    margin-bottom: 20px;
+  }
+
+  /* video */
+  .recipe-card-video {
+    margin-bottom: 20px;
+  }
+
+  /* save btn */
+  .recipe-save-btn {
+    padding: 14px 28px;
+  }
+
+  /* #endregion */
+}
+
+/* Styles for desktop  */
+@media screen and (min-width: 1168px) {
+  .cohort-list,
+  .discover-list,
+  .favorites-list {
+    grid-template-columns: repeat(3, 1fr);
+  }
+
+  /* header */
+  .nav-list {
+    gap: 30px;
+    font-size: 24px;
+    font-weight: 500;
+    line-height: 1.14;
+    letter-spacing: -0.02em;
+  }
+
+  /* section hero */
+  .hero h1 {
+    font-size: 46px;
+  }
+
+  .hero-info {
+    margin: 40px 80px;
+    gap: 60px;
+  }
+
+  .hero img {
+    width: 400px;
+  }
+
+  .hero p {
+    font-size: 20px;
+  }
+  /* #endregion */
 }
diff --git a/public/css/layout.css b/public/css/layout.css
index 54659fd..0aadeaf 100644
--- a/public/css/layout.css
+++ b/public/css/layout.css
@@ -1,6 +1,6 @@
 /* Styles for mobile  */
 .container {
-  max-width: 360px;
+  width: 375px;
   padding: 0 20px;
   margin: 0 auto;
 }
@@ -8,15 +8,15 @@
 /* Styles for tablet  */
 @media screen and (min-width: 768px) {
   .container {
-    max-width: 768px;
-    padding: 0 30px;
+    width: 768px;
+    padding: 0 32px;
   }
 }
 
 /* Styles for desktop  */
-@media screen and (min-width: 1280px) {
+@media screen and (min-width: 1168px) {
   .container {
-    max-width: 1280px;
-    padding: 0 60px;
+    min-width: 1168px;
+    padding: 0 15px;
   }
 }
diff --git a/public/img/hero.png b/public/img/hero.png
index 835adf0..9ffbc85 100644
Binary files a/public/img/hero.png and b/public/img/hero.png differ
diff --git a/public/img/hero_.png b/public/img/hero_.png
new file mode 100644
index 0000000..835adf0
Binary files /dev/null and b/public/img/hero_.png differ
diff --git a/public/img/logo.png b/public/img/logo.png
index 9abcbc5..ae6dc6c 100644
Binary files a/public/img/logo.png and b/public/img/logo.png differ
diff --git a/public/img/symbol-defs.svg b/public/img/symbol-defs.svg
new file mode 100644
index 0000000..8b85516
--- /dev/null
+++ b/public/img/symbol-defs.svg
@@ -0,0 +1,13 @@
+<svg aria-hidden="true" style="position: absolute; width: 0; height: 0; overflow: hidden;" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<defs>
+<symbol id="icon-menu" viewBox="0 0 32 32">
+<path stroke-linejoin="round" stroke-linecap="round" stroke-miterlimit="4" stroke-width="2.5" d="M4 16h24M4 8h24M4 24h24"></path>
+</symbol>
+<symbol id="icon-wrong" viewBox="0 0 32 32">
+<path fill="#e74a3b" style="fill: var(--color8, #e74a3b)" d="M14.4 20.8h3.2v3.2h-3.2v-3.2zM14.4 8h3.2v9.6h-3.2v-9.6zM15.984 0c-8.832 0-15.984 7.168-15.984 16s7.152 16 15.984 16c8.848 0 16.016-7.168 16.016-16s-7.168-16-16.016-16zM16 28.8c-7.072 0-12.8-5.728-12.8-12.8s5.728-12.8 12.8-12.8c7.072 0 12.8 5.728 12.8 12.8s-5.728 12.8-12.8 12.8z"></path>
+</symbol>
+<symbol id="icon-x-close" viewBox="0 0 32 32">
+<path stroke-linejoin="round" stroke-linecap="round" stroke-miterlimit="4" stroke-width="2.2857" d="M24 8l-16 16"></path>
+<path stroke-linejoin="round" stroke-linecap="round" stroke-miterlimit="4" stroke-width="2.2857" d="M8 8l16 16"></path>
+</symbol>
+</defs>
\ No newline at end of file
diff --git a/public/index.html b/public/index.html
index 0e5d365..77afa02 100644
--- a/public/index.html
+++ b/public/index.html
@@ -29,14 +29,9 @@
     <header>
       <div class="container">
         <a class="header-logo" href="/">
-          <img
-            src="./img/logo.png"
-            alt="Cohort 55 Recipes logo"
-            width="120"
-            height="120"
-          />
+          <img src="./img/logo.png" alt="Cohort 55 Recipes logo" />
         </a>
-        <nav>
+        <nav class="header-nav">
           <ul class="nav-list">
             <li class="nav-list-item">
               <a class="nav-list-link" href="#cohort">C55 Recipes</a>
@@ -47,27 +42,68 @@
             <li class="nav-list-item">
               <a class="nav-list-link" href="#favorites">Favorites</a>
             </li>
+            <li class="nav-list-item">
+              <a class="nav-list-link" href="#chat">Ask AI</a>
+            </li>
           </ul>
         </nav>
-        <button class="mode-btn" type="button"></button>
+        <div class="header-buttons-container">
+          <button class="mode-btn" type="button"></button>
+          <button class="header-btn-menu" type="button">
+            <svg class="header-icon-menu" width="28" height="28">
+              <use href="./img/symbol-defs.svg#icon-menu"></use>
+            </svg>
+          </button>
+        </div>
+      </div>
+
+      <div class="mob-menu">
+        <div class="mob-menu-container">
+          <button class="close-btn-menu" type="button">
+            <svg
+              class="close-icon-menu"
+              width="28"
+              height="28"
+              aria-label="menu close button icon"
+            >
+              <use href="./img/symbol-defs.svg#icon-x-close"></use>
+            </svg>
+          </button>
+          <nav class="mob-menu-nav">
+            <ul class="mob-nav-list">
+              <li class="mob-nav-list-item">
+                <a class="mob-nav-list-link" href="#cohort">C55 Recipes</a>
+              </li>
+              <li class="mob-nav-list-item">
+                <a class="mob-nav-list-link" href="#discover">Discover</a>
+              </li>
+              <li class="mob-nav-list-item">
+                <a class="mob-nav-list-link" href="#favorites">Favorites</a>
+              </li>
+              <li class="mob-nav-list-item">
+                <a class="mob-nav-list-link" href="#chat">Ask AI</a>
+              </li>
+            </ul>
+          </nav>
+        </div>
       </div>
     </header>
     <main>
       <section class="hero container">
         <h1>Taste the World With Cohort 55</h1>
-        <img
-          src="./img/hero.png"
-          alt="Hero illustration for Cohort 55 Recipe App — Taste the World Together"
-          width="260"
-          height="380"
-        />
-        <p>
-          We’re Cohort 55 — 19 people from different corners of the world who
-          met in the Netherlands to learn IT and ended up sharing much more than
-          code. This app brings together our personal recipes and thousands more
-          from MealDB. Explore global flavors, discover new dishes, and save the
-          ones you love. Welcome to our digital kitchen.
-        </p>
+        <div class="hero-info">
+          <img
+            src="./img/hero.png"
+            alt="Hero illustration for Cohort 55 Recipe App — Taste the World Together"
+          />
+          <p>
+            We’re Cohort 55 — 19 people from different corners of the world who
+            met in the Netherlands to learn IT and ended up sharing much more
+            than code. This app brings together our personal recipes and
+            thousands more from MealDB. Explore global flavors, discover new
+            dishes, and save the ones you love. Welcome to our digital kitchen.
+          </p>
+        </div>
       </section>
       <section id="cohort" class="cohort container">
         <h2>Recipes from our cohort</h2>
@@ -152,29 +188,29 @@ <h2>Your favorites</h2>
         <ul class="favorites-list"></ul>
       </section>
       <section id="chat" class="chat container">
-  <h2>Ask AI for a Recipe 🍳</h2>
-  <p class="chat-description">
-    Not sure what to cook? Just tell me — spicy, quick, comfort food... I'll handle the rest! 🍽️
-  </p>
-  <div class="chat-form">
-    <input
-      id="chat-input"
-      type="text"
-      class="chat-input"
-      placeholder="e.g. something spicy, quick pasta, Ukrainian soup..."
-    />
-    <button id="chat-btn" class="chat-btn" type="button">Ask AI</button>
-  </div>
-  <div id="chat-result" class="chat-result"></div>
-</section>
+        <h2>Ask AI for a Recipe 🍳</h2>
+        <p class="chat-description">
+          Not sure what to cook? Just tell me — spicy, quick, comfort food...
+          I'll handle the rest! 🍽️
+        </p>
+        <div class="chat-form">
+          <input
+            id="chat-input"
+            type="text"
+            class="chat-input"
+            placeholder="e.g. something spicy, quick pasta, Ukrainian soup..."
+          />
+          <button id="chat-btn" class="chat-btn" type="button">Ask AI</button>
+        </div>
+        <div id="chat-result" class="chat-result"></div>
+      </section>
     </main>
     <footer>
       <div class="container">
-        <p class="footer-text">
-          HackYourFuture · Cohort 55 · Project Group 4 · 2026
-        </p>
+        <p class="footer-text">HackYourFuture · Cohort 55</p>
+        <p class="footer-text">Project Group 4 · 2026</p>
         <a
-          class="footer-adress"
+          class="footer-address"
           href="https://maps.app.goo.gl/68oWnU8zhf1WEieC7"
           target="_blank"
           rel="noopener noreferrer"
@@ -185,7 +221,16 @@ <h2>Ask AI for a Recipe 🍳</h2>
 
     <div class="modal-overlay">
       <div class="modal">
-        <button class="close-btn" type="button">Х</button>
+        <button class="close-btn" type="button">
+          <svg
+            class="close-icon-modal"
+            width="28"
+            height="28"
+            aria-label="menu close button icon"
+          >
+            <use href="./img/symbol-defs.svg#icon-x-close"></use>
+          </svg>
+        </button>
         <div class="recipe-card-container"></div>
       </div>
     </div>
diff --git a/public/js/components/createRecipeInfoCard.js b/public/js/components/createRecipeInfoCard.js
index 5a355fb..79d08fd 100644
--- a/public/js/components/createRecipeInfoCard.js
+++ b/public/js/components/createRecipeInfoCard.js
@@ -39,7 +39,6 @@ const createImage = (recipe) =>
         className: 'recipe-card-img',
         src: recipe.image,
         alt: recipe.title,
-        width: '120',
       })
     : null;
 
diff --git a/public/js/components/createRecipeListCard.js b/public/js/components/createRecipeListCard.js
index e67bb58..a16bb44 100644
--- a/public/js/components/createRecipeListCard.js
+++ b/public/js/components/createRecipeListCard.js
@@ -15,7 +15,6 @@ const createImage = (recipe) =>
         className: 'recipe-list-img',
         src: recipe.image,
         alt: recipe.title,
-        width: '40',
       })
     : null;
 
diff --git a/public/js/events/handlerMobileMenu.js b/public/js/events/handlerMobileMenu.js
new file mode 100644
index 0000000..a0ce022
--- /dev/null
+++ b/public/js/events/handlerMobileMenu.js
@@ -0,0 +1,28 @@
+export const initMobileMenu = () => {
+  const mobMenu = document.querySelector('.mob-menu');
+  const closeMenuBtn = document.querySelector('.close-btn-menu');
+  const openMenuBtn = document.querySelector('.header-btn-menu');
+  const linkMobMenu = document.querySelectorAll('.mob-nav-list-item');
+
+  const openMobMenu = () => {
+    mobMenu.classList.add('is-open-menu');
+    document.body.classList.add('no-scroll');
+  };
+  const closeMobMenu = () => {
+    mobMenu.classList.remove('is-open-menu');
+    document.body.classList.remove('no-scroll');
+    openMenuBtn.blur();
+  };
+
+  openMenuBtn.addEventListener('click', openMobMenu);
+  closeMenuBtn.addEventListener('click', closeMobMenu);
+  linkMobMenu.forEach((link) => {
+    link.addEventListener('click', closeMobMenu);
+  });
+
+  document.addEventListener('keydown', (e) => {
+    if (e.key === 'Escape') {
+      closeMobMenu();
+    }
+  });
+};
diff --git a/public/js/events/handlerThemeToggle.js b/public/js/events/handlerThemeToggle.js
new file mode 100644
index 0000000..e857d90
--- /dev/null
+++ b/public/js/events/handlerThemeToggle.js
@@ -0,0 +1,18 @@
+export const initThemeToggle = () => {
+  const toggleBtn = document.querySelector('.mode-btn');
+  const root = document.documentElement;
+
+  // Check the saved theme
+  const savedTheme = localStorage.getItem('theme');
+  if (savedTheme === 'light') {
+    root.classList.add('theme-light');
+  }
+
+  // Toggle theme
+  toggleBtn.addEventListener('click', () => {
+    const isLight = root.classList.toggle('theme-light');
+
+    // Save the selection
+    localStorage.setItem('theme', isLight ? 'light' : 'dark');
+  });
+};
diff --git a/public/js/features/renderModeBtn.js b/public/js/features/renderModeBtn.js
deleted file mode 100644
index e69de29..0000000
diff --git a/public/main.js b/public/main.js
index c065c83..005ccf4 100644
--- a/public/main.js
+++ b/public/main.js
@@ -8,8 +8,10 @@ import {
   initCountryFilters,
   initIngredientFilters,
 } from './js/events/handlerFiltersMealDB.js';
+import { initMobileMenu } from './js/events/handlerMobileMenu.js';
 import { initRandomRecipe } from './js/events/handlerRandomRecipe.js';
 import { initSearchByDishName } from './js/events/handlerSearchByDishName.js';
+import { initThemeToggle } from './js/events/handlerThemeToggle.js';
 import {
   renderAddedByCohort,
   renderByDishNameCohort,
@@ -33,6 +35,8 @@ document.addEventListener('DOMContentLoaded', async () => {
   await renderCountryOptionMealDB();
   await renderIngredientsOptionMealDB();
 
+  initThemeToggle();
+  initMobileMenu();
   initRecipeModal();
   initFavorites();