* {
  margin: 0;
  box-sizing: border-box;
}
body {
  background-color: #ffc857;
  font-family: "Raleway", sans-serif;
}
header {
  position: sticky;
  top: 0px;
  font-size: 1.2rem;
  padding: 15px;
  display: flex;
  transition: background-color 0.3s ease;
  z-index: 1;
}
h1 {
  width: 80vw;
  color: white;
  transition: color 0.3s ease;
}
h1 a {
  color: #253cb0;
  transition: color 0.3s ease;
}
nav {
  position: relative;
  display: flex;
  width: 20vw;
}
nav .hamburger {
  position: absolute;
  width: 35px;
  height: 5px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background-color: #253cb0;
}
nav .hamburger::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  left: 50%;
  top: -200%;
  transform: translate(-50%, -50%);
  background-color: inherit;
}
nav .hamburger::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  left: 50%;
  top: +300%;
  transform: translate(-50%, -50%);
  background-color: inherit;
}
.welcome {
  display: flex;
  width: 100vw;
  height: 85vh;
}
.welcome .portrait {
  position: absolute;
  left: 10%;
  top: 25%;
  width: 175px;
  height: 250px;
  background-image: url("zdjecie.jpeg");
  background-position: center;
  background-size: cover;
  border: 3px solid #253cb0;
  border-radius: 50%;
}
.welcome .introduction {
  position: absolute;
  left: 50%;
  top: 75%;
  width: 50vw;
  padding: 15px;
  background-color: #253cb0;
  color: white;
  border-radius: 10px;
}
.construction {
  display: flex;
  width: 100%;
  height: 25vh;
  color: #253cb0;
  align-items: center;
  justify-content: center;
  padding: 15px;
  font-size: 1.5rem;
}
.construction i {
  font-size: 3rem;
  padding: 15px;
}
@media screen and (min-width: 768px) {
  header {
    font-size: 1rem;
  }
}