styleFinal.css

body {
  margin: 0;
  padding: 0;
  font-family: Verdana;
  background-color: #F6F2F2;
}

.flex_wrap_center_center {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

header {
  background-color: black;
  min-height: 89px;
}

.header-nav a {
  color: white;
  text-decoration: none;
  /* background-color: green; */
  padding: 0 15px;
  height: 89px;
  line-height: 89px;
  /* trick height = line-height */
  text-transform: uppercase;
  font-size: 14px;
  display: inline-block;
  min-width: 92px;
  /* это можно сделать когда навигация стэком */
  text-align: center;
}

.header-nav-ul {
  list-style: none;
  margin: 0;
  padding-inline-start: 0;
  /* height: 89px; */
  /* background-color: grey; */
}

.header-nav-ul-li {
  display: flex;
  /* flex: 1 0 160px; */
  /* min-width: 92px; */
  /* justify-content: center; */
  /* width: 92px; */
  /* height: 89px; */
  /* поднимает вверх меню */
  /* border: 4px solid blue; */
  /* background-color: aquamarine; */
}

.header-nav a:hover {
  background-color: tomato;
}

/* .header-nav li:hover {background-color: tomato;} */
/* cf. */

.intro {
  /* flex-wrap: nowrap;
  flex-shrink: 1;
  flex-grow: 0;
  flex-basis: 500px; */
}

.intro-box, .intro>a {
  width: 50%;
  /* min-width: 400px; */
}

.intro-box {
  padding: 0 15px;
  /* background-color: green; */
}

.intro>a {
  text-align: center;
}

.button {
  text-decoration: none;
  background-color: tomato;
  color: white;
  padding: 12px;
  display: inline-block;
  margin-top: 15px;
}

img {
  max-width: 100%;
}

footer {
  background-color: black;
  color: rgba(255, 255, 255, 0.5);
  max-width: 1586px;
  margin: 0 auto;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0 3vw;
}


.invert {
  filter: invert(1);
}

/* http://dimox.name/press_footer_bottom_with_css/ */
/* https://stackoverflow.com/questions/8133877/proportionally-resize-image-based-on-parent-div-size */