*{
  margin: 0;
  padding: 0;
  font-family: 'Poppins', sans-serif;
  box-sizing: border-box;
}

:root{
  --background-color: #fff;
  --text-color: #555;
  --title-color: #000;
}

.dark-theme{
  --background-color: #000;
  --text-color: #999;
  --title-color: #fff;
}


body{
  background: var(--background-color);
  color: var(--text-color);
  transition: background 0.8s, color 0.8s;
}

.header{
  width: 100%;
  min-height: 100vh;
  padding: 0 8%;
  position: relative;
  overflow: hidden;
}

nav{
  display: flex;
  align-items: center;
  pading: 10px 0;
}

.logo img{
  width: 160px;
}

.fornav{
  width:100px;
  text-align: right;
  list-style: none;
  margin-right: 50px;
}

nav ul li{
  display: inline-block;
  margin: 5x 15px;
}

nav ul li a{
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
}

.toggle-btn{
  background: #4864ff;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 150px;
  height: 40px;
  border-radius: 20px;
  cursor: pointer; 
}

.toggle-btn img{
  width: 25px;
  margin-left: 10px;
}

.content{
  margin-top: 10%;
  max-width: 600px;
}

.content h1{
  font-size: 80px;
  font-family: serif;
  color: var(--text-color);
  font-weight: 600;
}

.content a{
  background: #4864ff;
  color: #fff;
  padding: 15px 70px;
  border-radius: 30px;
  cursor: pointer;
  display: inline-block;
  margin-top: 30px;
  text-decoration: none;
}

.image-box{
  width: 500px;
  display: block;
}

.image-box{
  position: absolute;
  bottom: 0;
  right: 10%;
}

.pattern{
  position: absolute;
  top: 0;
  left: 50%;
  display: flex;
  transform: rotate(40deg);
  z-index: -1;
}

.pattern img{
  width: 400px;
  position: absolute;
  top: 0;
  left: 0;
  animation: move 1s linear infinite alternate-reverse;
}

.pattern img:nth-child(1){
  transform: rotate(-45deg) translate(-70px, -50px;);
  animation-delay: 0.5s;
}

.pattern img:nth-child(2){
  transform: rotate(65deg) translate(0px, -40px;) scale(.8);
  animation-delay: 1.5s;
}

@keyframes move{
  100%{
    margin-left: 40px;
    margin-top: 20px;
    opacity: 0.3; 
       }
}