/* ==== style.css ==== */
body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  color: #333;
  text-align: center;
  background: linear-gradient(to bottom right, rgba(240, 248, 255, 0.65), rgba(215, 230, 255, 0.65)),
    url('kostka.png') center/cover fixed;
  background-blend-mode: lighten;
}

/* Przyciemniony baner główny */
header {
  background: rgba(0, 85, 165, 0.7);
  color: white;
  padding: 100px 20px;
}

/* Nagłówki i sekcje */
header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  letter-spacing: 1px;
}

main {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(3px);
  border-radius: 10px;
  padding: 40px 20px;
  max-width: 800px;
  margin: 50px auto;
  box-shadow: 0 0 10px rgba(0, 85, 165, 0.15);
}

h2 {
  color: #0055a5;
  border-bottom: 2px solid #0055a5;
  display: inline-block;
  padding-bottom: 5px;
  margin-bottom: 20px;
}

.contact a {
  color: #0055a5;
  text-decoration: none;
  font-weight: bold;
}

footer {
  background: #0055a5;
  color: white;
  padding: 15px 0;
  margin-top: 50px;
}