diff --git a/exercicio1/style.css b/exercicio1/style.css
index 35af80d..75012e2 100644
--- a/exercicio1/style.css
+++ b/exercicio1/style.css
@@ -1,17 +1,19 @@
 #texto-fonte-root{
-
+    font-size: 3rem;
 }
 
 #texto-paddings-verticais{
-
+    padding: 2rem 0;
 }
 
 #altura-porcentagem-comprimento{
-
+    height: 20vw;
+    background-color: aqua;
 }
 
 #comprimento-metade-altura{
-
+    width: 50vw;
+    background-color: lightcoral;
 }
 
 .container{
@@ -21,13 +23,15 @@
 }
 
 #fonte-setenta{
-
+    font-size: 70%;
 }
 
 #comprimento-pai{
-
+    width: 10%;
+    background-color: yellowgreen;
 }
 
 #altura-pai{
-
+    height: 10%;
+    background-color: aquamarine;
 }
\ No newline at end of file
diff --git a/exercicio2/style.css b/exercicio2/style.css
index e69de29..1faceea 100644
--- a/exercicio2/style.css
+++ b/exercicio2/style.css
@@ -0,0 +1,42 @@
+*{
+    padding: 0;
+    margin: 0;
+}
+
+main{
+    display: grid;
+    grid-template-columns: repeat(3, 1fr);
+    height: 100vh;
+}
+
+section{
+    border: 1px solid black;
+    font-size: 4rem;
+}
+
+/* tablets */
+@media  screen and (min-device-width: 481px) and (max-device-width: 800px){
+    main{
+        background-color: yellowgreen;
+        grid-template-columns: repeat(2, 1fr);
+    }
+
+    section{
+        font-size: 2rem;
+    }
+    
+}
+
+/* celulares */
+@media screen and (max-device-width: 480px){
+    main{
+        background-color: lightcoral;
+        grid-template-columns: 1fr;
+    } 
+
+    section{
+        border: 2px solid yellow;
+        font-size: 1rem;
+    }
+    
+}
\ No newline at end of file
diff --git a/fixacao/styles.css b/fixacao/styles.css
index cac900b..ae815da 100644
--- a/fixacao/styles.css
+++ b/fixacao/styles.css
@@ -1,48 +1,48 @@
 * {
-    padding: 0;
-    margin: 0;
-    font-family: Helvetica, sans-serif;
-  }
-  
-  header {
-    background-color: #4986b8;
-    color: white;
-    height: 40px;
-    padding: 20px;
-    width: 100%;
-  }
-  
-  main {
-    height: 77vh;
-    max-width: 800px;
-    display: flex;
-    flex-direction: row;
-    margin: 20px auto;
-    gap: 10px;
-  }
-  
-  main aside,
-  main section {
-    padding: 10px;
-  }
-  
-  .left {
-    background-color: moccasin;
-  }
-  
-  section {
-    background-color: aliceblue;
-  }
-  
-  .right {
-    background-color: mistyrose;
-  }
-  
-  footer {
-    position: absolute;
-    bottom: 0;
-    background-color: black;
-    color: white;
-    padding: 20px;
-    width: 100%;
-  }
\ No newline at end of file
+  padding: 0;
+  margin: 0;
+  font-family: Helvetica, sans-serif;
+}
+
+header {
+  background-color: #4986b8;
+  color: white;
+  height: 40px;
+  padding: 20px;
+  width: 100%;
+}
+
+main {
+  height: 77vh;
+  max-width: 800px;
+  display: flex;
+  flex-direction: row;
+  margin: 20px auto;
+  gap: 10px;
+}
+
+main aside,
+main section {
+  padding: 10px;
+}
+
+.left {
+  background-color: moccasin;
+}
+
+section {
+  background-color: aliceblue;
+}
+
+.right {
+  background-color: mistyrose;
+}
+
+footer {
+  position: absolute;
+  bottom: 0;
+  background-color: black;
+  color: white;
+  padding: 20px;
+  width: 100%;
+}
\ No newline at end of file