Александр

body {
    font-size: 18px;
}

C:\Users\ИМЯ_ПОЛЬЗОВАТЕЛЯ\AppData\Roaming\Sublime Text 3\Packages\User

font-family: 'Assistant', 'Segoe UI', Arial, Helvetica, sans-serif;

const header = document.querySelector('.header');
const maxHeight = window.innerHeight;
const minHeight = 150;

window.addEventListener('scroll', () => {
    const height = Math.max(minHeight, maxHeight - window.scrollY);

    header.style.setProperty('height', `${height}px`);
});

.wrapper {
  display: flex;
  justify-content: center;
}

a::after {
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	content: '';
}