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Responsive |Active Tab Animation using CSS

Tutorial Description :

In this Tutorial I will create a Active Tab Animation Menu Bar using CSS only .

I will use font Font Awesome for the icons and google fonts with the font style of Roboto for the main font.

For the navigation I will use display flex so CSS3 flexbox.

I will also use pseudo element and pseudo classes as hover, after, before, and active in order to hide and make content visible .

Img:

Font Awesome
Google Fonts

HTML :

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link href="https://fonts.googleapis.com/css?family=Dancing+Script|Open+Sans&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="style.css">
    <title>Active Tab Animation</title>
  </head>
  <body>
    <header>
      <h1>Active Tab Animation</h1>
    </header>
    <nav class="nav">
      <ul class="nav_items">
        <li><a href="#">home</a></li>
        <li><a href="#">home</a></li>
        <li><a href="#">home</a></li>
        <li><a href="#">home</a></li>
        <li><a href="#">home</a></li>
        <div class="slide slide-start"></div>
      </ul>
    </nav>
  </body>
</html>

CSS:

* {
  margin: 0;
  padding: 0;
  list-style: none;
  text-decoration: none;
  font-size: 16px;
}

body {
  background-image: url(/img/road-landscape-nature-forest-39811.jpg);
  background-position: center/center;
  background-repeat: no-repeat;
  background-size: cover;
  font-family: "Open Sans";
}
@keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
header h1 {
  text-align: center;
  font-family: "Dancing Script";
  font-size: 12rem;
  color: #fff;
  position: relative;
  top: 20vh;
  text-shadow: 1px 1px 5px #111;
  animation: fade-in 5s ease-in;
}

.nav {
  position: relative;
  margin: 25% auto;
  height: 80px;
  width: 600px;
  background-color: red;
  border: 1px solid #333;
  box-shadow: 0 2px 3px 0 rgba(0, 0, 0, 0.5);
  border-radius: 5px;
  background-color: transparent;
  animation: fade-in 1.5s ease-in;
}
.nav_items {
  display: flex;
  justify-content: space-around;
  justify-items: center;
  align-items: center;
  height: 100%;
  position: relative;
}
.nav_items li {
  position: relative;
  height: 100%;
  width: 100%;
  margin: auto;
  padding-top: 1.5rem;
  text-align: center;
  display: block;
  cursor: pointer;
}
.nav_items li a {
  color: #fff;
  font-size: 1.3rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 2px 2px 5px #111;
  z-index: 1;
  height: 100%;
  width: 100%;
  position: relative;
}

.nav_items .slide {
  position: absolute;
  height: 100%;
  top: 0;
  left: 0;
  background-color: rgba(230, 170, 75, 0.8);
  z-index: 0;
  transition: all 0.4s ease;
}
.nav_items .slide-start,
li:nth-child(1):hover ~ .slide {
  width: 120px;
  left: 0;
  border-radius: 5px 0 0 5px;
}
li:nth-child(2):hover ~ .slide {
  width: 120px;
  left: 120px;
  border-radius: 0;
}
li:nth-child(3):hover ~ .slide {
  width: 120px;
  left: 240px;
  border-radius: 0;
}
li:nth-child(4):hover ~ .slide {
  width: 120px;
  left: 360px;
  border-radius: 0;
}
li:nth-child(5):hover ~ .slide {
  width: 120px;
  left: 480px;
  border-radius: 0 5px 5px 0;
}

My Course: Web Development HTML CSS & JS Beginner to Advance

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