:root {
    --primary-color: rgba(94, 104, 107, 0.75);
    --overlay-color: rgba(56, 62, 67, 0.85);
    --menu-speed: 1s;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.4;
  }
  
  .container {
    max-width: 960px;
    margin: auto;
    overflow: hidden;
    padding: 0 3rem;
  }
  #head{
    font-family:'Lucida Sans';
  }
  .showcase {
    background: var(--primary-color);
    color: rgb(37, 38, 41);
    height: 100vh;
    position: relative;
  }
  
  .showcase:before {
    content: '';
    background: url("engine.jpg") no-repeat center center/cover;
    position: absolute;
    top: 0;
    left: 0;
     width: 100%;
     height: 100%;  
    z-index: -1;
    animation:slider 20s infinite linear;
  }
    
  @keyframes slider {
    0%{ background-image: url('engine.jpg');}
    25%{ background-image: url('lib.jpeg');}
    50%{background-image: url('study.jpeg');}
    75%{background-image: url('lipton.jpeg');}
   
}

  
  .showcase .showcase-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    height: 100%;
  }
  
  .showcase h1 {
    font-size: 4rem;
  }
  
  .showcase p {
    font-size: 1.3rem;
  }
  
  .btn {
    display: inline-block;
    border: none;
    background: var(--primary-color);
    color: rgb(117, 58, 58);
    padding: 0.75rem 1.5rem;
    margin-top: 1rem;
    transition: opacity 1s ease-in-out;
    text-decoration: none;
  }
  
  .btn:hover {
    opacity: 0.7;
  }
  
  /* MENU STYLES */
  .menu-wrap {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
  }
  
  .menu-wrap .toggler {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    cursor: pointer;
    width: 50px;
    height: 50px;
    opacity: 0;
  }
  
  .menu-wrap .hamburger {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    width: 60px;
    height: 60px;
    padding: 1rem;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  /* Hamburger Line */
  .menu-wrap .hamburger > div {
    position: relative;
    flex: none;
    width: 100%;
    height: 2px;
    background: rgb(255, 255, 255);
    display: flex;
    align-items: center;
    justify-content: centre;
    transition: all 0.4s ease;
  }
  
  /* Hamburger Lines - Top & Bottom */
  .menu-wrap .hamburger > div::before,
  .menu-wrap .hamburger > div::after {
    content: '';
    position: absolute;
    z-index: 1;
    top: -10px;
    width: 100%;
    height: 2px;
    background: inherit;
  }
  
  /* Moves Line Down */
  .menu-wrap .hamburger > div::after {
    top: 10px;
  }
  
 
  .menu-wrap .toggler:checked ~ .menu {
    visibility: visible;
  }
  
  .menu-wrap .toggler:checked ~ .menu > div {
    transform: scale(1);
    transition-duration: var(--menu-speed);
  }
  
  .menu-wrap .toggler:checked ~ .menu > div > div {
    opacity: 1;
   
  }
  
  .menu-wrap .menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    visibility: hidden;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .menu-wrap .menu > div {
    background: var(--overlay-color);
    border-radius: 50%;
    width: 200vw;
    height: 200vw;
    display: flex;
    flex: none;
    align-items: center;
    justify-content: center;
    transform: scale(0);
    transition: all 0.4s ease;
  }
  .menu-wrap .menu .icons{
    height:100px;
    width:100px;
    position: absolute;
    /* bottom: 10px; */
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left:3.9%;
  }
  .menu-wrap .menu .icons a{
    margin: 0 5px;
    color:white;
    padding-inline: 10px;
  
  }

  .menu-wrap .menu li a i{
    margin-right: 20px;
  }

  
  .menu-wrap .menu > div > div {
    text-align: center;
    max-width: 90vw;
    max-height: 100vh;
    opacity: 0;
    transition: opacity 0.4s ease;
  }
  
  .menu-wrap .menu > div > div > ul > li {
    list-style: none;
    color: white;
    font-size: 2rem;
    padding: 1rem;
  }
  
  .menu-wrap .menu > div > div > ul > li > a {
    color: inherit;
    text-decoration: none;
    transition: color 0.4s ease;
  }

  .button {
    display: inline-block;
    border-radius: 4px;
    background-color:rgb(176, 238, 239);
    border: none;
    color:rgb(40, 40, 40);
    text-align: center;
    font-size: 26px;
    padding: 15px;
    width: 150px;
    transition: all 0.5s;
    cursor: pointer;
    margin: 20px 5px;
  }
  
  .button span {
    cursor: pointer;
    display: inline-block;
    position: relative;
    transition: 0.5s;
  }
  
  .button span:after {
    content: '\00bb';
    position: absolute;
    opacity: 0;
    top: 0;
    right: -20px;
    transition: 0.5s;
  }
  
  .button:hover span {
    padding-right: 25px;
  }
  
  .button:hover span:after {
    opacity: 1;
    right: 0;
  }