*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #ffffff;
  color: #222222;
  margin: 0;
  padding: 0;
}

.logo-center {
  text-align: center;
  margin-bottom: 10px;
  background-color: rgba(0, 0, 0, 0.05);
  padding: 10px;
  border-radius: 8px;
}

.logo-img {
  width: 180px;
  height: auto;
  max-width: 100%;
}

header {
  background-color: #222;
  color: white;
  padding: 20px;
  text-align: center;
}

nav {
  background-color: #333;
  text-align: center;
}

nav a {
  color: white;
  display: inline-block;
  padding: 15px 20px;
  text-decoration: none;
}

nav a:hover {
  background-color: #555;
}

main {
  padding: 40px 20px;
  max-width: 1000px;
  margin: 0 auto;
}

h1, h2 {
  color: #FFFFFF;
  text-align: center;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.gallery img {
  width: 100%;
  height: auto;
  border: 2px solid #ccc;
  border-radius: 4px;
  transition: transform 0.3s;
  display: block;
  max-width: 100%;
}

.gallery img:hover {
  transform: scale(1.05);
}

footer {
  background-color: #111;
  color: white;
  padding: 20px;
  text-align: center;
}

/* ✅ RESPONSYWNOŚĆ: */

@media (max-width: 768px) {
  nav {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  nav a {
    padding: 12px 10px;
    width: 100%;
    border-top: 1px solid #444;
  }

  main {
    padding: 20px 10px;
  }

  .gallery {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .logo-img {
    width: 140px;
  }
}

@media (max-width: 480px) {
  h1, h2 {
    font-size: 1.4rem;
  }

  nav a {
    font-size: 1rem;
  }

  .gallery {
    grid-template-columns: 1fr;
  }

  .logo-img {
    width: 120px;
  }
}