* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Segoe UI', sans-serif;
  line-height: 1.6;
  color: #333;
  scroll-behavior: smooth;
}
nav {
  background: #0057b8;
  color: white;
  display: flex;
  justify-content: space-between;
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}
nav ul {
  display: flex;
  list-style: none;
  gap: 1rem;
}
nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}
.hero {
  background: url('https://via.placeholder.com/1600x500?text=Wirtualne+Biuro') center/cover;
  color: white;
  padding: 100px 20px;
  text-align: center;
}
.btn {
  display: inline-block;
  margin-top: 1rem;
  background: #ffd700;
  color: black;
  padding: 10px 20px;
  text-decoration: none;
  font-weight: bold;
  border-radius: 4px;
}
section {
  padding: 60px 20px;
  max-width: 1100px;
  margin: auto;
  text-align: center;
}
.oferta-grid, .cennik-grid, .galeria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 2rem;
}
.oferta-box, .plan {
  background: #f9f9f9;
  padding: 20px;
  border-radius: 8px;
}
.plan.highlight {
  border: 2px solid #0057b8;
}
form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  max-width: 600px;
  margin: auto;
}
form input, form textarea {
  padding: 10px;
  font-size: 1rem;
}
form button {
  background: #0057b8;
  color: white;
  padding: 10px;
  border: none;
  cursor: pointer;
}
footer {
  background: #333;
  color: white;
  padding: 20px;
  text-align: center;
}