/*  enlarge logo image in masthead to fit better. */
.ptx-masthead .logo-link {
width: 6em;
height: 6em;
}
/*  shrink gigantic ptx logo */
.ptx-toc::after {
  height: 4em;
}

/*  put subtitle on its own line */
.ptx-masthead .title-container .subtitle {display:block;}

:root {
  --navy: #072040;
  --gold: #CFB888;
  --harborblue: #78A1BB;
  --gray: #BCBEC0;
  --shipgray: #E2E2E2;
  --logoblue: #173863;
  }

:root:not(.dark-mode) {
     --doc-title-color: var(--logoblue);
     --tocitem-background: var(--harborblue);
     }