*{
  margin:0;
  padding: 0;
  box-sizing: border-box;
}
body{
  font-family:system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif ;
  background-color: black;
  color: lightgray;
  min-height: 100vh;
  line-height: 1.5;
}
/* GRADIENT AND LATER BLUR EFFECT */
.image-gradient{
  position:absolute;
  top: 0;
  right: 0;
  opacity: 0.5;
  z-index: -1;
}
.layer-blur{
  height: 0;
  width:30rem;
  position:absolute;
  top: 20%;
  right: 0;
  box-shadow: 0 0 700px 15px white;
  rotate: -30deg;
  z-index: -1;
}
/*CONTAINER*/
.container{
  width: 100%;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  overflow: hidden;
}
/* HEADER */
header{
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 5rem;
}
header h1{
  margin: 0;
  font-size: 3rem;
  font-weight:300 ;
}
nav{
  display: flex;
  align-items: center;
  gap: 3rem;
  margin-left: -5%;
}
nav a {
  font-size: 1rem;
  letter-spacing: 0.1rem;
  transition:color 0.2s ease;
  text-decoration: none;
  color: inherit;
  z-index:999;
}
nav a:hover{
  color: #a7a7a7; ;
}
.btn-signing{
  background-color: #a7a7a7;
  color: black;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  border: none;
  font-size: 1rem;
  font-weight: 500;
  transition: background-color 0.2s ease;
  cursor:pointer;
  z-index:999;
}
.btn-signing:hover{
  background-color: white;
}

/* MAIN CONTENT */
main{
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(90vh - 6rem);
}
.content{
  max-width: 40rem;
  margin-left: 10%;
  z-index: 999;
}
.tag-box{
  position: relative;
  width: 18rem;
  height: 2.5rem;
  border-radius:50px ;
  background: linear-gradient(to right, #656565,#7f42a7,#6600c5,#5300a0,#757575,#656565);
  background-size: 200%;
  animation: animationGradient 2.5s linear infinite;
  box-shadow: 0 0 15px rgba(255,255,255,0.3);
}
@keyframes animationGradient {
  to{
    background-position: 200%;
  }
}
.tag-box .tag{
  position: absolute;
  inset: 3px 3px 3px 3px;
  background-color: black;
  border-radius: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.5s ease;
  cursor: pointer;
}
.tag-box .tag:hover{
  color: #5300a0;
}
.content h1{
  font-size: 4rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin: 2rem 0;
  line-height: 1.2;
  text-shadow: 0 0 10px gray;
}
.description{
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  max-width: 35rem;
  color: gray;
}
.buttons{
  display: flex;
  gap:1rem;
  margin-top: 3rem;
}
.btn-get-started{
  text-decoration: none;
  border: 1px solid #2a2a2a;
  padding: 0.7rem 1.2rem;
  border-radius: 50px;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  transition: background-color 0.2s ease;
}
.btn-signing:hover{
  background-color: #1a1a1a;
}
.btn-signing-main{
  text-decoration: none;
  background-color: lightgray;
  color: black;
  padding: 0.6rem 2.5rem;
  border-radius: 50px;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  transition: background-color 0.2s ease;
}
.btn-signing-main:hover{
  background-color: gray;
}
.robot-3d{
  position: absolute;
  top: 0;
  right: -20%;
 }
 /* MOBILE RESPONSIVE */
@media(max-width:768px){
  .container{
    padding: 0 1rem;
  }
  header{
    padding: 1rem 0;
    flex-direction: column;
    gap: 1rem;
  }
  nav{
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-left: 0;
  }
  nav a{
    font-size: 0.85rem;
  }
  header h1{
    font-size: 1.8rem;
  }
  .btn-signing{
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
  }
  main{
    min-height: calc(100vh - 10rem);
  }
  .content{
    margin-left: 0;
    padding: 0 1rem;
    max-width: 100%;
  }
  .robot-3d{
    scale:0.5;
    top: -25%;
    right: 0;
  }
  .tag-box{
    width: 100%;
    max-width: 16rem;
  }
  .content h1{
    font-size: 2.5rem;
    margin: 1.5rem 0;
  }
  .description{
    font-size: 1rem;
    max-width: 100%;
  }
  .buttons{
    flex-direction: column;
    align-items: stretch;
    gap: 0.8rem;
    margin-top: 2rem;
  }
  .btn-get-started{
    font-size: 0.9rem;
    padding: 0.8rem 1rem;
    text-align: center;
  }
  .btn-signing-main{
    font-size: 0.9rem;
    padding: 0.8rem 1rem;
    text-align: center;
  }
  .image-gradient{
    max-width: 100%;
    height: auto;
  }
  .layer-blur{
    width: 20rem;
    box-shadow: 0 0 400px 10px white;
  }
}

@media(max-width:480px){
  header h1{
    font-size: 1.5rem;
  }
  .content h1{
    font-size: 2rem;
  }
  .tag-box{
    max-width: 14rem;
    height: 2rem;
  }
  .tag-box .tag{
    font-size: 0.85rem;
  }
  .description{
    font-size: 0.9rem;
  }
}