+
+/* Tooltip support. */
+
+h1.Sh, h2.Ss { position: relative; }
+.An, .Ar, .Cd, .Cm, .Dv, .Em, .Er, .Ev, .Fa, .Fd, .Fl, .Fn, .Ft,
+.Ic, code.In, .Lb, .Lk, .Ms, .Mt, .Nd, code.Nm, .Pa, .Rs,
+.St, .Sx, .Sy, .Va, .Vt, .Xr {
+ display: inline-block;
+ position: relative; }
+
+.An::before { content: "An"; }
+.Ar::before { content: "Ar"; }
+.Cd::before { content: "Cd"; }
+.Cm::before { content: "Cm"; }
+.Dv::before { content: "Dv"; }
+.Em::before { content: "Em"; }
+.Er::before { content: "Er"; }
+.Ev::before { content: "Ev"; }
+.Fa::before { content: "Fa"; }
+.Fd::before { content: "Fd"; }
+.Fl::before { content: "Fl"; }
+.Fn::before { content: "Fn"; }
+.Ft::before { content: "Ft"; }
+.Ic::before { content: "Ic"; }
+code.In::before { content: "In"; }
+.Lb::before { content: "Lb"; }
+.Lk::before { content: "Lk"; }
+.Ms::before { content: "Ms"; }
+.Mt::before { content: "Mt"; }
+.Nd::before { content: "Nd"; }
+code.Nm::before { content: "Nm"; }
+.Pa::before { content: "Pa"; }
+.Rs::before { content: "Rs"; }
+h1.Sh::before { content: "Sh"; }
+h2.Ss::before { content: "Ss"; }
+.St::before { content: "St"; }
+.Sx::before { content: "Sx"; }
+.Sy::before { content: "Sy"; }
+.Va::before { content: "Va"; }
+.Vt::before { content: "Vt"; }
+.Xr::before { content: "Xr"; }
+
+.An::before, .Ar::before, .Cd::before, .Cm::before,
+.Dv::before, .Em::before, .Er::before, .Ev::before,
+.Fa::before, .Fd::before, .Fl::before, .Fn::before, .Ft::before,
+.Ic::before, code.In::before, .Lb::before, .Lk::before,
+.Ms::before, .Mt::before, .Nd::before, code.Nm::before,
+.Pa::before, .Rs::before,
+h1.Sh::before, h2.Ss::before, .St::before, .Sx::before, .Sy::before,
+.Va::before, .Vt::before, .Xr::before {
+ opacity: 0;
+ transition: .15s ease opacity;
+ pointer-events: none;
+ position: absolute;
+ bottom: 100%;
+ box-shadow: 0 0 .35em var(--fg);
+ padding: .15em .25em;
+ white-space: nowrap;
+ font-family: Helvetica,Arial,sans-serif;
+ font-style: normal;
+ font-weight: bold;
+ background: var(--bg);
+ color: var(--fg); }
+.An:hover::before, .Ar:hover::before, .Cd:hover::before, .Cm:hover::before,
+.Dv:hover::before, .Em:hover::before, .Er:hover::before, .Ev:hover::before,
+.Fa:hover::before, .Fd:hover::before, .Fl:hover::before, .Fn:hover::before,
+.Ft:hover::before, .Ic:hover::before, code.In:hover::before,
+.Lb:hover::before, .Lk:hover::before, .Ms:hover::before, .Mt:hover::before,
+.Nd:hover::before, code.Nm:hover::before, .Pa:hover::before,
+.Rs:hover::before, h1.Sh:hover::before, h2.Ss:hover::before, .St:hover::before,
+.Sx:hover::before, .Sy:hover::before, .Va:hover::before, .Vt:hover::before,
+.Xr:hover::before {
+ opacity: 1;
+ pointer-events: inherit; }
+
+/* Overrides to avoid excessive margins on small devices. */
+
+@media (max-width: 37.5em) {
+.manual-text {
+ margin-left: 0.5em; }
+h1.Sh, h2.Ss { margin-left: 0em; }
+.Bd-indent { margin-left: 2em; }
+.Bl-hang > dd {
+ margin-left: 2em; }
+.Bl-tag { margin-left: 2em; }
+.Bl-tag > dt {
+ margin-left: -2em; }
+.HP { margin-left: 2em;
+ text-indent: -2em; }
+}
+
+/* Overrides for a dark color scheme for accessibility. */
+
+@media (prefers-color-scheme: dark) {
+html { --bg: #1E1F21;
+ --fg: #EEEFF1; }
+:link { color: #BAD7FF; }
+:visited { color: #F6BAFF; }
+}