#hero {
  background-image: url('../img/koshi_nage_hero.jpg');
  background-size: cover;
  background-position: center;
  height: 400px; /* lub inna wysokość, np. 100vh */
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
  text-align: center;
  padding: 2rem;
}

/* Dodaj margines górny lub padding pod #hero, jeśli chcesz przestrzeni */
header h1,
header nav {
  text-align: left;
  margin-top: 20px;
}
#hero .btn {
    background: #444;
    color: #fff;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 8px;
}

section {
    padding: 20px 40px;
}

footer {
    margin-top: 40px;
    text-align: center;
    padding: 20px;
    background: #222;
    color: white;
}