/* RESET & BAZOWE STYLOWANIE */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: 'Open Sans', sans-serif;
  background: #f5f7fa;
  color: #222;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: auto;
  padding: 0 20px;
}

/* NAGŁÓWEK */
header {
  position: sticky;
  top: 0;
  background: #003366;
  color: white;
  z-index: 1000;
}
.header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}
.logo {
  font-size: 26px;
  font-weight: 700;
}
nav {
  display: flex;
  gap: 20px;
  align-items: center;
}
nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 8px 12px;
  transition: background 0.2s ease;
}
nav a:hover {
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
}
.lang-switcher button {
  background: #fff;
  color: #003366;
  border: none;
  padding: 5px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
}
.lang-switcher button:hover {
  background: #ddeaff;
}

/* MENU MOBILNE */
.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 28px;
  color: white;
  cursor: pointer;
}

/* HERO SECTION */
.hero {
  position: relative;
  background: linear-gradient(to bottom, rgba(0,0,0,0.6), rgba(0,0,0,0.6)),
              url('./hero.png') no-repeat center center / cover;
  height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-align: center;
}
.hero .overlay {
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.407), rgba(255, 255, 255, 0.416));
  padding: 40px 20px;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero h2 {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 15px;
}
.hero p {
  font-size: 20px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
}

/* SEKCJE GŁÓWNE */
section {
  padding: 70px 0;
}
section:nth-of-type(even) {
  background: #eef2f5;
}
section .container {
  max-width: 900px;
}
section h2 {
  font-size: 28px;
  margin-bottom: 20px;
  color: #003366;
}
section p,
section li {
  font-size: 16px;
  margin-bottom: 10px;
}

/* STOPKA */
footer {
  background: #003366;
  color: white;
  text-align: center;
  padding: 20px 0;
  font-size: 14px;
}

/* RESPONSYWNOŚĆ */
@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  nav {
    display: none;
    flex-direction: column;
    background: #003366;
    width: 100%;
  }

  #nav-menu.active {
    display: flex;
    padding-top: 10px;
    padding-bottom: 10px;
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  nav a {
    text-align: center;
    padding: 12px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 18px;
  }

  .lang-switcher {
    justify-content: center;
    padding: 10px 0;
  }
}