body {
  margin: 0;
  color: #333;
  font-size: 16px;
}
h1 {
  padding: 16px;
}

.header {
  position: relative;
  overflow: hidden;
}
.header::before {
  content: '';
  position: absolute;
  top: -10px;
  right: -10px;
  bottom: -10px;
  left: -10px;
  -webkit-filter: blur(10px);
  filter: blur(10px);
  z-index: -1;
  background: url('https://avatars0.githubusercontent.com/u/8262896?v=3&s=100') no-repeat bottom/cover;
}

.header__main {
  height: 50vw;
  padding: 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.1);
  font-size: 24px;
  text-decoration: none;
  color: #fff;
  text-shadow: 1px 1px 3px #000, -1px -1px 3px #000;
}
.header__avatars {
  border-radius: 50%;
  margin-right: 16px;
  box-shadow: 0 0 20px #000;
}

.block {
  height: 20vh;
  display: flex;
  justify-content: space-around;
  align-items: center;
}
.block a {
  color: #666;
  padding: 16px;
  transition: all 0.2s;
}
.block a:hover {
  background: #f0f0f0;
}
.block:nth-child(1) {
  background: rgba(255, 255, 255, 0.5);
}
.block:nth-child(2) {
  background: #ccc;
}
.block:nth-child(3) {
  background: #999;
}
.block:nth-child(4) {
  background: #666;
}
.block:nth-child(5) {
  background: #333;
}
.block:nth-child(6) {
  background: #000;
}