nav {
 margin: 27px auto 0;

 position: relative;
 width: 590px;
 height: 50px;
 background-color: #34495e;
 border-radius: 8px;
 font-size: 0;
}
nav a {
 line-height: 50px;
 height: 100%;
 font-size: 15px;
 display: inline-block;
 position: relative;
 z-index: 1;
 text-decoration: none;
 text-transform: uppercase;
 text-align: center;
 color: white;
 cursor: pointer;
}
nav .animation {
 position: absolute;
 height: 100%;
 top: 0;
 z-index: 0;
 transition: all .5s ease 0s;
 border-radius: 8px;
}
a:nth-child(1) {
 width: 100px;
}
a:nth-child(2) {
 width: 110px;
}
a:nth-child(3) {
 width: 100px;
}
a:nth-child(4) {
 width: 160px;
}
a:nth-child(5) {
 width: 120px;
}
nav .start-home, a:nth-child(1):hover~.animation {
 width: 100px;
 left: 0;
 background-color: #1abc9c;
}
nav .start-about, a:nth-child(2):hover~.animation {
 width: 110px;
 left: 100px;
 background-color: #e74c3c;
}
nav .start-blog, a:nth-child(3):hover~.animation {
 width: 100px;
 left: 210px;
 background-color: #3498db;
}
nav .start-portefolio, a:nth-child(4):hover~.animation {
 width: 160px;
 left: 310px;
 background-color: #9b59b6;
}
nav .start-contact, a:nth-child(5):hover~.animation {
 width: 120px;
 left: 470px;
 background-color: #e67e22;
}

body {
 font-size: 12px;
 font-family: sans-serif;
 background: #2c3e50;
}
h1 {
 text-align: center;
 margin: 40px 0 40px;
 text-align: center;
 font-size: 30px;
 color: #ecf0f1;
 text-shadow: 2px 2px 4px #000000;
 font-family: 'Cherry Swash', cursive;
}

p {
 position: absolute;
 bottom: 20px;
 width: 100%;
 text-align: center;
 color: #ecf0f1;
 font-family: 'Cherry Swash',cursive;
 font-size: 16px;
}

span {
 color: #2BD6B4;
}