/* Minimalny reset  */
html {
  font-size: 16px; /* bazowy rozmiar czcionki */
  font-family: system-ui, sans-serif; /* font systemowy */
  line-height: 1.5; /* lepsza czytelność */
}
body {
  margin: 1rem;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  background-attachment: fixed;
  background-size: cover;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  color: white;
  box-sizing: border-box;
}

.index_container {
  text-align: center;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.05);
  padding: 60px 100px;
  border-radius: 15px;
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}

.initials {
  font-size: 45px;
  letter-spacing: 1.6px;
  margin-bottom: 40px;
  color: #ffffff;
}

.index_navbar {
  display: flex;
  justify-content: center;
  gap: 40px;
}

.index_navbar a {
  color: #0066cc;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: 0.5px;
  position: relative;
  transition: color 0.3s ease;
}

.index_navbar a::after {
  content: '';
  position: absolute;
  width: 0%;
  height: 2px;
  bottom: -6px;
  left: 0;
  background: #ffcc00;
  transition: width 0.3s ease;
}

.index_navbar a:hover::after {
  width: 100%;
}