сделал footer

assets/css/gp-style-core.css

@@ -416,6 +416,11 @@ button{
 }
 .social-media__item{
   margin-left: 32px;
+
+  transition: opacity .2s ease-out;
+}
+.social-media__item:hover{
+  opacity: .8;
 }
 .social-media__item:first-child{
   margin-left: 0px;
@@ -571,6 +576,18 @@ button{
   background-repeat: no-repeat;
   background-size: contain;
 }
+.button--black{
+  padding: 7px 15px;
+
+  font-family: var(--font-family);
+  font-weight: 500;
+  font-size: 24px;
+  line-height: 133%;
+  color: var(--text-white);
+
+  background: var(--background-black);
+  border: 1px solid var(--text-white);
+}
 .to-know{
   width: 100%;
 

assets/css/gp-style-desktop.css

@@ -557,6 +557,102 @@
 }
 /* modal */
 
+/* footer */
+.footer{
+  padding: 40px 24px;
+
+  background: var(--background-black);
+}
+.footer__wrapper{
+  width: 100%;
+
+  display: flex;
+}
+.footer__content{
+  width: calc(100% - 364px);
+}
+.footer__logo{
+  width: 187px;
+  height: 43px;
+}
+.footer__address{
+  margin-top: 24px;
+
+  font-family: var(--font-family);
+  font-weight: 500;
+  font-size: 24px;
+  line-height: 133%;
+  color: var(--text-white);
+  font-style: normal;
+}
+.footer__list{
+  margin: 28px -12px -12px -12px;
+
+  display: flex;
+  justify-content: space-between;
+  flex-wrap: wrap;
+}
+.footer-list__item{
+  margin: 12px;
+
+  width: calc(50% - 24px);
+
+  display: flex;
+  flex-direction: column;
+}
+.footer-list__item:nth-child(even){
+  width: 322px;
+}
+.footer-list__title{
+  font-family: var(--font-family);
+  font-weight: 700;
+  font-size: 16px;
+  line-height: 125%;
+  color: var(--text-white);
+}
+.footer-list__link{
+  margin-top: 4px;
+
+  font-family: var(--font-family);
+  font-weight: 500;
+  font-size: 24px;
+  line-height: 133%;
+  color: var(--text-white);
+
+  text-decoration: none;
+}
+.footer__form{
+  margin-left: 48px;
+
+  width: 364px;
+}
+.footer__about{
+  margin-top: 16px;
+
+  padding-top: 15px;
+
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+
+  border-top: 1px solid var(--text-white);
+}
+.footer-about__text{
+  font-family: var(--font-family);
+  font-weight: 500;
+  font-size: 20px;
+  line-height: 120%;
+  text-align: right;
+  color: var(--text-white);
+  opacity: 0.6;
+
+  text-decoration: none;
+}
+.footer__social-media{
+  display: none;
+}
+/* footer */
+
 @media only screen and (max-width: 1600px) {
 
 .wrapper{

assets/css/gp-style-mobile.css

@@ -41,6 +41,31 @@
 }
 /* modal */
 
+/* footer */
+.footer__about{
+    display: none;
+}
+.footer__wrapper{
+    flex-direction: column;
+}
+.footer__content{
+    width: 100%;
+}
+.footer__form{
+    margin-top: 24px;
+    margin-left: 0;
+
+    width: 100%;
+}
+.footer__social-media{
+    display: block;
+
+    margin-top: 24px;
+}
+.footer__list{
+    margin-top: 20px;
+}
+/* footer */
 }
 
 @media only screen and (max-width: 576px) {

assets/css/gp-style-tablet.css

@@ -37,7 +37,15 @@
     top: 56px;
 }
 /* header */
-    
+
+/* footer */
+.footer__about{
+    justify-content: center;
+}
+.footer-about__text{
+    display: none;
+}
+/* footer */
 }
 
 @media only screen and (max-width: 980px) {