diff --git a/Trillo/starter/css/style.css b/Trillo/starter/css/style.css
index c580bac..4d0845d 100644
--- a/Trillo/starter/css/style.css
+++ b/Trillo/starter/css/style.css
@@ -126,6 +126,51 @@ body {
     border-radius: 50%;
     margin-right: 1rem; }
 
+.side-nav {
+  font-size: 1.4rem;
+  list-style: none;
+  margin-top: 3.5rem; }
+  .side-nav__item {
+    position: relative; }
+    .side-nav__item:not(:last-child) {
+      margin-bottom: 0.5rem; }
+  .side-nav__item::before {
+    content: "";
+    position: absolute;
+    top: 0;
+    left: 0;
+    height: 100%;
+    width: 3px;
+    background-color: var(--color-primary);
+    transform: scaleY(0);
+    transform-origin: center;
+    transition: transform 0.2s, width 0.4s cubic-bezier(1, 0, 0, 1) 0.2s, background-color 0.1s; }
+  .side-nav__item:hover::before, .side-nav__item--active::before {
+    transform: scaleY(1);
+    width: 100%; }
+  .side-nav__item:active::before {
+    background-color: var(--color-primary-light); }
+  .side-nav__link:link, .side-nav__link:visited {
+    color: var(--color-grey-light-1);
+    text-decoration: none;
+    text-transform: uppercase;
+    display: flex;
+    align-items: center;
+    padding: 1.5rem 3rem;
+    position: relative;
+    z-index: 10; }
+  .side-nav__icon {
+    width: 1.75rem;
+    height: 1.75rem;
+    margin-right: 2rem;
+    fill: currentColor; }
+
+.legal {
+  font-size: 1.2rem;
+  color: var(--color-grey-light-4);
+  text-align: center;
+  padding: 2.5rem; }
+
 .container {
   max-width: 120rem;
   min-height: 50rem;
@@ -147,8 +192,12 @@ body {
 
 .sidebar {
   background-color: var(--color-grey-dark-1);
-  flex: 0 0 18%; }
+  flex: 0 0 18%;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between; }
 
 .hotel-view {
   flex: 1;
-  background-color: #fff; }
+  background-color: #fff;
+  height: 80rem; }
diff --git a/Trillo/starter/index.html b/Trillo/starter/index.html
index f4bcc74..6a44267 100644
--- a/Trillo/starter/index.html
+++ b/Trillo/starter/index.html
@@ -54,7 +54,48 @@
         </nav>
       </header>
       <div class="content">
-        <nav class="sidebar">Navigation</nav>
+        <nav class="sidebar">
+          <ul class="side-nav">
+            <li class="side-nav__item">
+              <a href="#" class="side-nav__link">
+                <svg class="side-nav__icon">
+                  <use xlink:href="img/sprite.svg#icon-home"></use>
+                </svg>
+                <span>Home</span>
+              </a>
+            </li>
+
+            <li class="side-nav__item side-nav__item--active">
+              <a href="#" class="side-nav__link">
+                <svg class="side-nav__icon">
+                  <use xlink:href="img/sprite.svg#icon-aircraft-take-off"></use>
+                </svg>
+                <span>Flight</span>
+              </a>
+            </li>
+
+            <li class="side-nav__item">
+              <a href="#" class="side-nav__link">
+                <svg class="side-nav__icon">
+                  <use xlink:href="img/sprite.svg#icon-key"></use>
+                </svg>
+                <span>Car rental</span>
+              </a>
+            </li>
+
+            <li class="side-nav__item">
+              <a href="#" class="side-nav__link">
+                <svg class="side-nav__icon">
+                  <use xlink:href="img/sprite.svg#icon-map"></use>
+                </svg>
+                <span>Tours</span>
+              </a>
+            </li>
+          </ul>
+
+          <div class="legal">&copy; 2017 by trillo. Al rights reserved.</div>
+        </nav>
+
         <main class="hotel-view">Hotel view</main>
       </div>
     </div>
diff --git a/Trillo/starter/sass/_components.scss b/Trillo/starter/sass/_components.scss
index 661f7eb..9d7c38b 100644
--- a/Trillo/starter/sass/_components.scss
+++ b/Trillo/starter/sass/_components.scss
@@ -67,7 +67,7 @@
 .user-nav {
   display: flex;
   align-items: center;
-  align-self: stretch; //make it cover the entire height
+  align-self: stretch; //NOTE: make it cover the entire height
 
   & > * {
     height: 100%;
@@ -114,3 +114,74 @@
     margin-right: 1rem;
   }
 }
+
+// Side navigation
+.side-nav {
+  font-size: 1.4rem;
+  list-style: none;
+  margin-top: 3.5rem;
+
+  &__item {
+    position: relative;
+
+    &:not(:last-child) {
+      margin-bottom: 0.5rem;
+    }
+  }
+
+  &__item::before {
+    content: "";
+    position: absolute;
+    top: 0;
+    left: 0;
+    height: 100%;
+    width: 3px;
+    background-color: var(--color-primary);
+    transform: scaleY(0);
+
+    transform-origin: center; //NOTE: cool
+    transition:
+      transform 0.2s,
+      width 0.4s cubic-bezier(1, 0, 0, 1) 0.2s,
+      //NOTE: duration timing delay
+      background-color 0.1s;
+  }
+
+  &__item:hover::before,
+  &__item--active::before {
+    transform: scaleY(1);
+    width: 100%;
+  }
+
+  &__item:active::before {
+    background-color: var(--color-primary-light);
+  }
+
+  &__link:link,
+  &__link:visited {
+    color: var(--color-grey-light-1);
+    text-decoration: none;
+    text-transform: uppercase;
+    display: flex;
+    align-items: center;
+    padding: 1.5rem 3rem;
+
+    position: relative;
+    z-index: 10;
+  }
+
+  &__icon {
+    width: 1.75rem;
+    height: 1.75rem;
+    margin-right: 2rem;
+    fill: currentColor; //NOTE: color of current or parent element
+  }
+}
+
+// Legal
+.legal {
+  font-size: 1.2rem;
+  color: var(--color-grey-light-4);
+  text-align: center;
+  padding: 2.5rem;
+}
diff --git a/Trillo/starter/sass/_layout.scss b/Trillo/starter/sass/_layout.scss
index 37a127f..f619e9d 100644
--- a/Trillo/starter/sass/_layout.scss
+++ b/Trillo/starter/sass/_layout.scss
@@ -25,9 +25,14 @@
 .sidebar {
   background-color: var(--color-grey-dark-1);
   flex: 0 0 18%;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
 }
 
 .hotel-view {
   flex: 1;
   background-color: #fff;
+
+  height: 80rem; // temporary
 }