.tmp_playground { padding: 0px var(--main-gap); }
.tmp_playground_half { padding: 0px var(--main-gap-half); }


header { width: 100%; position: absolute; top: 50%;  transform: translateY(-50%); }
header img {  max-width: 420px; max-height: 80vh; margin-bottom: var(--main-gap);} 
header p { font-size: 2.2em;  color: #ccc; }