:root {
  --primary-color: #5b4bc9;
  --secondary-color: #3178c6;
  --background: #f3f6fb;
  --text-color: #1e1e2f;
  --section-bg-1: #f6f9fe;   /* bardzo jasny niebieski */
  --section-bg-2: #f4f2fd;   /* bardzo jasny fiolet */
  --section-bg-3: #ffffffdd; /* delikatny biały */
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background: var(--background);
  color: var(--text-color);
  line-height: 1.6;
  scroll-behavior: smooth;
}

header {
  background: #f4f2fd;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.logo-container {
  display: flex;
  align-items: center;
}

.logo {
  height: 40px;
  margin-right: 10px;
}

.brand {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  opacity: 0;
  animation: slideIn 1.2s ease-in forwards;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-links li a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links li a:hover {
  color: var(--primary-color);
}

main {
  padding: 2rem 1rem;
  max-width: 1000px;
  margin: auto;
}

/* Kolory tła sekcji naprzemiennie */
#o-nas {
  background-color: var(--section-bg-3);
}

#co-robimy {
  background-color: var(--section-bg-3);
}

#dlaczego {
  background-color: var(--section-bg-3);
}

#srodowisko {
  background-color: var(--section-bg-3);
}

#misja {
  background-color: var(--section-bg-3);
}

.content-section {
  border-radius: 10px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 0 15px rgba(0,0,0,0.03);
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-in-out;
  text-align: justify;
}

.content-section.visible {
  opacity: 1;
  transform: translateY(0);
}

h2 {
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

ul {
  padding-left: 1.5rem;
}

footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.9rem;
  background-color: #8465ffa4;
  margin-top: 2rem;
}

@keyframes slideIn {
  from {
    transform: translateX(-40px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}