body {
  margin: 0;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: "Segoe UI", sans-serif;
  overflow: hidden;

  background: linear-gradient( /* tło */
    to top,
    #8b5a2b 0%,      
    #8b5a2b 20%,     
    #87ceeb 20%,     
    #87ceeb 100%     
  );
}

body::before {
  content: ""; /* kreska odzielająca tło */
  position: absolute;
  bottom: 20%;
  left: 0;
  width: 100%;
  height: 5px;
  background: #4a2e17;
}

* {
  user-select: none;
}