.header-center h1 {
  font-size: clamp(1.2rem, 2.133vw + 0.933rem, 2rem);
}

.header-center h2 {
  font-size: clamp(1.0rem, 1.333vw + 0.833rem, 1.5rem);
}

/*
https://spirokovac.com/css-clamp-calculator/
max_width = 800px; 
min_width = 200px; 
*/