* {
  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: #e7e7e7;
  min-height: 100vh;
  line-height: 1.5;
}

/* GRADIENT AND LAYER 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: 0.5s;
  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 rgba(128, 128, 128, 0.418);
}

.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-get-started: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%;
}

/* TABLET RESPONSIVE */
@media (max-width: 1300px) {
  header {
    padding: 1rem 0.5rem;
  }

  .content {
    margin-top: 85%;
  }

  .robot-3d {
    scale: 0.6;
    top: -20%;
    right: 2%;
  }
}

/* MOBILE RESPONSIVE */
@media (max-width: 768px) {
  header {
    padding: 1rem 0.1rem;
  }

  nav {
    display: none;
  }

  header h1 {
    font-size: 2rem;
  }

  .btn-signing {
    padding: 0.6rem 1.5rem;
  }

  .content {
    margin-top: 25rem;
  }

  .robot-3d {
    scale: 1;
    top: -25%;
    right: 0;
  }

  .content {
    max-width: 30rem;
    margin-left: 10%;
  }

  .tag-box {
    width: 12rem;
  }

  .content h1 {
    font-size: 2.5rem;
  }

  .description {
    font-size: 1rem;
  }

  .btn-get-started {
    font-size: 0.8rem;
    padding: 0.8rem 1.2rem;
  }

  .btn-signing-main {
    font-size: 0.8rem;
    padding: 0.8rem 2rem;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1.5rem;
  }

  .btn-signing {
    padding: 0.4rem 1rem;
  }

  .robot-3d {
    top: -28%;
    right: 0;
  }

  .content {
    max-width: 32rem;
    margin-left: 10%;
    margin-top: 15rem;
  }

  .tag-box {
    width: 15rem;
    height: 2rem;
  }

  .content h1 {
    font-size: 2rem;
    margin: 1rem 0;
  }

  .btn-get-started {
    font-size: 0.6rem;
    padding: 0.5rem 1.5rem;
  }

  .btn-signing-main {
    font-size: 0.6rem;
    padding: 0.5rem 1.5rem;
  }
}