diff --git a/tasks/1.html b/tasks/1.html
index 62be4d7..0775ab4 100755
--- a/tasks/1.html
+++ b/tasks/1.html
@@ -14,6 +14,18 @@ <h1 class="global-heading">&nbsp;</h1>
             <section class="global-result">
                 <style>
                     /* ваш код здесь... */
+                    div { 
+                        background: #6698ff;
+                    }
+                    .c1{
+                        background: #ff6698;
+                    }
+                    #id{
+                        background: #98ff66
+                    }
+                    aside{
+                        background: #6698ff;
+                    }
                 </style>
 
                 <article class="global-scope">
diff --git a/tasks/10.html b/tasks/10.html
index d4510fa..bcdaba5 100755
--- a/tasks/10.html
+++ b/tasks/10.html
@@ -13,6 +13,12 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                p[class="title"]::first-letter{
+                    color: #ff6698;
+                }
+                p[class="description"]::first-line{
+                    color: #6698ff;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/11.html b/tasks/11.html
index 7cbdc68..f3565a6 100755
--- a/tasks/11.html
+++ b/tasks/11.html
@@ -13,6 +13,15 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                input[value="invalid-email"]{
+                    border: 3px solid #ff6698;
+                }
+                input[value="invalid-email"]:focus{
+                    border: 3px solid #6698ff;
+                }
+                input[value="email@yandex.ru"]{
+                    border: 3px solid #98ff66;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/12.html b/tasks/12.html
index df47ce3..195201e 100755
--- a/tasks/12.html
+++ b/tasks/12.html
@@ -13,6 +13,15 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                div {
+                    background-color: #ffff66;
+                }
+                div:first-child,
+                div:nth-child(3),
+                div:nth-child(7),
+                div:last-child{
+                    background-color: #ffb366;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/13.html b/tasks/13.html
index d9e3f6e..a245d76 100755
--- a/tasks/13.html
+++ b/tasks/13.html
@@ -13,6 +13,9 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                div:nth-of-type(4n+1) > div:first-of-type{
+                    background: #ff6698;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/14.html b/tasks/14.html
index 980a2a5..29b14af 100755
--- a/tasks/14.html
+++ b/tasks/14.html
@@ -13,6 +13,12 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                li {
+                    list-style-type: none; 
+                }
+                li:before {
+                    content: "+ ";
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/15.html b/tasks/15.html
index 705eeee..4b68382 100755
--- a/tasks/15.html
+++ b/tasks/15.html
@@ -13,6 +13,9 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                ul > li a[href$=".zip"]:after{
+                    content: " \2193";
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/16.html b/tasks/16.html
index eb614cc..32610fa 100755
--- a/tasks/16.html
+++ b/tasks/16.html
@@ -13,6 +13,18 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                div{
+                    background: #ff6698 !important;
+                }
+                .c1{
+                    background: #6698ff !important;
+                }
+                #id1{
+                    background: #ffb366 !important;
+                }
+                .c7{
+                    background: #ffff66 !important;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/17.html b/tasks/17.html
index c973a48..3096eeb 100755
--- a/tasks/17.html
+++ b/tasks/17.html
@@ -13,6 +13,12 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                input[type="checkbox"] {
+                    outline: none;
+                }
+                input[type="checkbox"]:checked ~ input[type="checkbox"]{
+                    outline: 1px solid #ff6698;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/18.html b/tasks/18.html
index 2634da4..f016ad2 100755
--- a/tasks/18.html
+++ b/tasks/18.html
@@ -13,6 +13,9 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                div:not(:hover){
+                    opacity: 0.5;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/19.html b/tasks/19.html
index 3af53a6..34c99f8 100755
--- a/tasks/19.html
+++ b/tasks/19.html
@@ -13,6 +13,24 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                article > div{
+                    background: #ffb366;
+                }
+                div > div{
+                    background: white;
+                }
+                div:first-of-type > div:last-of-type{
+                    background: #98ff66;
+                }
+                div:nth-of-type(2) > div:nth-of-type(2n+2){
+                    background: #ff6698;
+                }
+                div:nth-of-type(3) > div:nth-of-type(2n+1){
+                    background: #6698ff;
+                }
+                div:last-of-type > div:first-of-type{
+                    background: #ffff66;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/2.html b/tasks/2.html
index 27ecc28..6194678 100755
--- a/tasks/2.html
+++ b/tasks/2.html
@@ -13,6 +13,17 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                .c1{
+                    background: #ff6698;
+                    border: 2px solid #000;
+                }
+                .c2{
+                    background: #ffb366;;
+                }
+                .c1.c2{
+                    background: #6698ff;
+                    border: 2px solid #000;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/20.html b/tasks/20.html
index 07a5869..5aef5ab 100755
--- a/tasks/20.html
+++ b/tasks/20.html
@@ -13,12 +13,18 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                .red-gt2 div:nth-last-child(n+3){
+                    background: #FF6698;
+                }
+                .red-gt2 div:nth-last-child(n+3) ~ div{
+                    background: #FF6698;
+                }
             </style>
 
             <section class="global-result">
                 <article class="global-scope">
                     <div class="red-gt2">
-                        <div></div>
+                        <div></div>                        
                     </div>
                     <div class="red-gt2">
                         <div></div>
diff --git a/tasks/3.html b/tasks/3.html
index c652179..176e5c9 100755
--- a/tasks/3.html
+++ b/tasks/3.html
@@ -13,6 +13,12 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                article > div{
+                    border: 2px solid #000;
+                }
+                div > div{
+                    background: #6698ff;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/4.html b/tasks/4.html
index b367da7..bdcc7ef 100755
--- a/tasks/4.html
+++ b/tasks/4.html
@@ -13,6 +13,9 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                article > article:nth-of-type(n+2){
+                    border-top: 1px solid #000;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/5.html b/tasks/5.html
index 98f61c4..cfc8ede 100755
--- a/tasks/5.html
+++ b/tasks/5.html
@@ -13,6 +13,10 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                .tab{
+                    background: black;
+                    color: white;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/6.html b/tasks/6.html
index 059db07..f830c09 100755
--- a/tasks/6.html
+++ b/tasks/6.html
@@ -13,6 +13,7 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                [href*="yandex.ru"] { color: #ff6698; }
             </style>
 
             <section class="global-result">
diff --git a/tasks/7.html b/tasks/7.html
index c3e1e50..22da08e 100755
--- a/tasks/7.html
+++ b/tasks/7.html
@@ -13,6 +13,9 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                img:not([alt]){
+                    opacity: 0.5;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/8.html b/tasks/8.html
index cd21aa6..294feb9 100755
--- a/tasks/8.html
+++ b/tasks/8.html
@@ -13,6 +13,9 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                a[target="_blank"]{
+                    color: #ff6698;
+                }
             </style>
 
             <section class="global-result">
diff --git a/tasks/9.html b/tasks/9.html
index 30ac7f8..944fd22 100755
--- a/tasks/9.html
+++ b/tasks/9.html
@@ -13,6 +13,24 @@ <h1 class="global-heading">&nbsp;</h1>
         <main class="global-results">
             <style>
                 /* ваш код здесь... */
+                a:visited[href]{
+                    color: #ffb366;
+                }
+                a:hover[href]{
+                    color: #ff6698;
+                }
+                a:active[href]{
+                    color: #98ff66;
+                }
+                a:visited:not([href]){
+                    color: black;
+                }
+                a:hover:not([href]){
+                    color: gray;
+                }
+                a:active:not([href]){
+                    color: black;
+                }
             </style>
 
             <section class="global-result">