diff --git a/css/style.css b/css/style.css
index 4a2ad24..8401097 100644
--- a/css/style.css
+++ b/css/style.css
@@ -32,7 +32,7 @@ header h1 {
 
 .navbar {
   box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.3);
-  border: 2px solid rgba(0, 0, 0, 0.3);
+  border: 1px solid rgba(0, 0, 0, 0.3);
   border-left: 0;
   border-right: 0; }
 
@@ -69,6 +69,7 @@ a.social-link:hover {
 
 /* ------------------ CARDS ------------------- */
 .card {
+  border-radius: 3px 3px 3px 3px;
   box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.3);
   border: none;
   margin-bottom: 1.2em; }
@@ -78,13 +79,20 @@ a.social-link:hover {
 
 /* header and titles */
 .card-header {
-  border-top-left-radius: 3px;
-  border-top-right-radius: 3px;
-  border: 2px solid rgba(0, 0, 0, 0.3);
+  border: 1px solid rgba(0, 0, 0, 0.3);
   font-size: 1.1em;
   box-shadow: inset 0px 2px 0px rgba(255, 255, 255, 0.1);
   text-shadow: 0px 1px 1px rgba(0, 0, 0, 0.3);
-  font-weight: 600; }
+  font-weight: 600;
+  border-radius: 0; }
+  .card-header:first-child {
+    border-radius: 3px 3px 3px 3px;
+    border-bottom-left-radius: 0;
+    border-bottom-right-radius: 0; }
+  .card-header:last-child {
+    border-radius: 3px 3px 3px 3px;
+    border-top-left-radius: 0;
+    border-top-right-radius: 0; }
 
 .card h1, .card h2, .card h3, .card h4, .card h5, .card h6, .card h7, .card h8, .card h9, .card h10 {
   color: #333;
@@ -101,7 +109,7 @@ h1.card-title, h2.card-title, h3.card-title, h4.card-title, h5.card-title, h6.ca
 /* meta */
 .card-meta {
   padding: 1em;
-  border-bottom: 2px solid rgba(0, 0, 0, 0.2); }
+  border-bottom: 1px solid rgba(0, 0, 0, 0.2); }
 
 .card-meta.media {
   -ms-flex-align: center !important;
@@ -134,7 +142,8 @@ a.list-group-item:hover {
 
 /* ------------------ BUTTONS ------------------- */
 .btn {
-  border: 2px solid rgba(0, 0, 0, 0.3);
+  border: 1px solid rgba(0, 0, 0, 0.3);
+  border-radius: 3px 3px 3px 3px;
   box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.3), inset 0px -2px 0px rgba(0, 0, 0, 0.2);
   text-shadow: 0px -1px 0px rgba(0, 0, 0, 0.3); }
 
@@ -142,19 +151,26 @@ a.list-group-item:hover {
   position: relative;
   box-shadow: 0px 2px 6px rgba(0, 0, 0, 0.3), inset 0px -2px 0px rgba(0, 0, 0, 0.2);
   top: 1px;
-  border: 2px solid rgba(0, 0, 0, 0.3); }
+  border: 1px solid rgba(0, 0, 0, 0.3); }
 
 .btn:active {
   position: relative;
   box-shadow: inset 0px 2px 0px rgba(0, 0, 0, 0.2);
   top: 2px;
-  border: 2px solid rgba(0, 0, 0, 0.3); }
+  border: 1px solid rgba(0, 0, 0, 0.3); }
 
 .btn-group {
   box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.3); }
 
 .btn-group .btn {
-  box-shadow: inset 0px -2px 0px rgba(0, 0, 0, 0.2); }
+  box-shadow: inset 0px -2px 0px rgba(0, 0, 0, 0.2);
+  border-radius: 3px 3px 3px 3px; }
+  .btn-group .btn:not(:first-child) {
+    border-top-left-radius: 0;
+    border-bottom-left-radius: 0; }
+  .btn-group .btn:not(:last-child) {
+    border-top-right-radius: 0;
+    border-bottom-right-radius: 0; }
 
 .btn-group .btn:hover {
   position: relative;
@@ -166,7 +182,7 @@ a.list-group-item:hover {
   position: relative;
   box-shadow: inset 0px 2px 0px rgba(0, 0, 0, 0.2) !important;
   top: 2px;
-  border: 2px solid rgba(0, 0, 0, 0.3); }
+  border: 1px solid rgba(0, 0, 0, 0.3); }
 
 .btn:focus, .btn-primary:focus, .btn-secondary:focus, .btn-danger:focus, .btn-warning:focus, .btn-success:focus, .btn-info:focus, .btn-dark:focus, .btn-light:focus {
   position: relative;
@@ -176,7 +192,8 @@ a.list-group-item:hover {
 
 /* ------------------ ALERTS ------------------- */
 .alert {
-  border: 2px solid rgba(0, 0, 0, 0.3);
+  border: 1px solid rgba(0, 0, 0, 0.3);
+  border-radius: 3px 3px 3px 3px;
   color: rgba(0, 0, 0, 0.7);
   box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.3); }
 
@@ -186,6 +203,7 @@ a.list-group-item:hover {
 
 /* ------------------ BREADCRUMB ------------------- */
 .breadcrumb {
+  border-radius: 3px 3px 3px 3px;
   box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.3), inset 0px -2px 0px rgba(0, 0, 0, 0.2);
   border: 0;
   background-color: #eeeeec;
@@ -218,6 +236,7 @@ a.list-group-item:hover {
     width: 25%; } }
 
 .card-preview {
+  border-radius: 3px 3px 3px 3px;
   width: 100%;
   margin: auto;
   box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.3), inset 0px -2px 0px rgba(0, 0, 0, 0.2); }
diff --git a/scss/style.scss b/scss/style.scss
index a0f508d..9119487 100644
--- a/scss/style.scss
+++ b/scss/style.scss
@@ -13,6 +13,10 @@ $border-size: 1px;
   border: $border-size solid rgba(0, 0, 0, 0.3)
 }
 
+@mixin border-radius {
+  border-radius: $border-radius $border-radius $border-radius $border-radius;
+}
+
 #wrapper {
   background: #64b5f6 url('../img/background.png') center bottom repeat-x;
 }
@@ -98,6 +102,7 @@ a.social-link:hover {
 /* ------------------ CARDS ------------------- */
 
 .card {
+  @include border-radius();
 	box-shadow: $large-shadow;
   border: none;
   margin-bottom:1.2em;
@@ -110,13 +115,24 @@ a.social-link:hover {
 /* header and titles */
 
 .card-header {
-	border-top-left-radius:3px;
-	border-top-right-radius:3px;
   @include borders();
   font-size:1.1em;
   box-shadow: $inset-relief;
 	text-shadow: 0px 1px 1px rgba(0,0,0,0.3);
   font-weight:600;
+  border-radius: 0;
+  
+  &:first-child {
+    @include border-radius();
+    border-bottom-left-radius: 0;
+    border-bottom-right-radius: 0;
+  }
+  
+  &:last-child {
+    @include border-radius();
+    border-top-left-radius: 0;
+    border-top-right-radius: 0;
+  }
 }
 
 .card h1,.card h2,.card h3,.card h4,.card h5,.card h6,.card h7,.card h8,.card h9,.card h10  {
@@ -181,6 +197,7 @@ a.list-group-item:hover {
 
 .btn {
 	@include borders();
+	@include border-radius();
 	box-shadow: $large-shadow, $inset-shadow;
 	text-shadow: 0px -1px 0px rgba(0,0,0,0.3);
 }
@@ -205,6 +222,15 @@ a.list-group-item:hover {
 
 .btn-group .btn {
 	box-shadow: $inset-shadow;
+	@include border-radius();
+	&:not(:first-child) {
+	  border-top-left-radius: 0;
+	  border-bottom-left-radius: 0;
+	}
+	&:not(:last-child) {
+	  border-top-right-radius: 0;
+	  border-bottom-right-radius: 0;
+	}
 }
 
 .btn-group .btn:hover {
@@ -232,6 +258,7 @@ a.list-group-item:hover {
 
 .alert {
   @include borders();
+  @include border-radius();
   color:rgba(0, 0, 0, 0.7);
   box-shadow: $large-shadow;
 }
@@ -244,6 +271,7 @@ a.list-group-item:hover {
 /* ------------------ BREADCRUMB ------------------- */
 
 .breadcrumb {
+  @include border-radius();
 	box-shadow: $large-shadow, $inset-shadow;
   border: 0;
   background-color:#eeeeec;
@@ -295,8 +323,8 @@ a.list-group-item:hover {
 }
 
 .card-preview {
-  width:100%;
-  
+  @include border-radius();
+  width:100%;  
   margin:auto;
   box-shadow: $large-shadow, $inset-shadow;
 }