* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body,
button {
  font-family: "Poppins", sans-serif;
}
header {
  display: flex;
  width: 80%;
  margin: auto;
  height: 10vh;
  align-items: center;
}
.logo-container {
  flex: 1;
  display: flex;
  align-items: center;
}
nav {
  flex: 2;
}

.nav-links {
  display: flex;
  justify-content: space-around;
  list-style: none;
  font-size: 2rem;
}

.presentation {
  display: flex;
  width: 90%;
  margin: auto;
  min-height: 60vh;
  align-items: center;
}
.cover img {
  height: 20vh;
  animation: drop 2s ease;
}
.logo-container img {
  height: 10vh;
}
.logo {
  margin-left: 9px;
}
.introduction {
  flex: 1;
}
.intro-text h1 {
  font-size: 44px;
  background: linear-gradient(to right, rgb(195, 6, 6), rgb(235, 117, 70));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.intro-text p {
  font-size: 27px;
  margin-top: 5px;
}
.cover {
  flex: 1;
}
.cta {
  margin-top: 20px;
  padding: 50px 0px 0px 0px;
}
.cta-on {
  height: 50px;
  color: rgb(73, 13, 13);
  border: 2px solid rgb(73, 13, 13);
  background: transparent;
  font-size: 20px;
  font-weight: bold;
  padding: 0px 20px 0px 20px;
}

.cta-off {
  height: 50px;
  width: 150px;
  color: white;
  border: 2px solid rgb(189, 43, 43);
  background: rgb(189, 43, 43);
  font-size: 20px;
  margin-left: 30px;
}
.big-circle {
  position: absolute;
  top: 0;
  right: 0;
  z-index: -1;
  opacity: 0.3;
  height: 80%;
}
.medium-circle {
  position: absolute;
  top: 30%;
  right: 30%;
  z-index: -1;
  opacity: 0.5;
  height: 60%;
}
.small-circle {
  position: absolute;
  bottom: 0;
  left: 20%;
  z-index: -1;
}
.laptop-select {
  display: flex;
  justify-content: space-around;
  width: 15%;
  position: absolute;
  right: 25%;
  bottom: 30%;
}

@keyframes drop {
  0% {
    opacity: 0;
    transform: translateX(-80px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}
@media screen and (max-width: 930px) {
  header {
    flex-direction: column;
  }
  .presentation {
    flex-direction: column;
    margin-top: 30px;
  }
  .introduction {
    text-align: center;
    margin-top: 5vh;
  }
  .intro-text h1 {
    font-size: 40px;
  }
  .intro-text p {
    font-size: 25px;
  }
  .cover img {
    height: 15vh;
    margin-top: 50px;
  }
  .cta {
    margin-top: 20px;
    padding: 10px 0px 0px 0px;
  }
  .laptop-select {
    bottom: 15%;
    right: 50%;
    width: 50%;
    transform: translate(50%, 15%);
  }
  .nav-links {
    flex-direction: column;
    font-size: 1.5rem;
  }
}