/* The Side Nerd Blog (sidenerdapps.com/mainnerd): a 1996 home page in Side Nerd's colors. One stylesheet. */
:root{
  --midnight:#0d1419; --navy:#192933; --slate:#2d3748; --aqua:#34b1e8; --aqua-light:#5bc4f0; --aqua-ink:#0b6795;
  --paper:#ffffff; --canvas:#f6f7f8; --ink:#16181d; --muted:#6b7280; --rule:#d8dadf; --text-on-dark:#e2e8f0;
  --exact:#176b70; --meas:#2f5f9e; --pub:#5a5a5a; --ours:#9a5b00; --claim:#8a2d5a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--text-on-dark);font-family:"Times New Roman",Times,serif;font-size:18px;line-height:1.55;
  background-color:var(--midnight);
  background-image:radial-gradient(1px 1px at 12px 18px,#5bc4f0 50%,transparent 51%),
    radial-gradient(1px 1px at 70px 96px,#e2e8f0 50%,transparent 51%),
    radial-gradient(1.5px 1.5px at 140px 40px,#94a3b8 50%,transparent 51%),
    radial-gradient(1px 1px at 190px 150px,#34b1e8 50%,transparent 51%),
    radial-gradient(1px 1px at 40px 170px,#e2e8f0 50%,transparent 51%);
  background-size:220px 200px}
a{color:var(--aqua-ink)}
.masthead a,.foot a,.side a{color:var(--aqua-light)}
a:visited{color:#5a4a9a}
.side a:visited,.foot a:visited{color:#b9a6ee}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;color:#000;padding:6px;z-index:9}

/* ticker: the marquee, done politely */
.ticker{overflow:hidden;white-space:nowrap;background:var(--navy);border-bottom:2px ridge var(--aqua);
  font-family:"Space Mono","Courier New",monospace;font-size:13px;color:var(--aqua-light);padding:4px 0}
.ticker-run{display:inline-block;padding-left:100%;animation:run 60s linear infinite}
.ticker:hover .ticker-run{animation-play-state:paused}
@keyframes run{to{transform:translateX(-100%)}}
@media (prefers-reduced-motion:reduce){.ticker-run{animation:none;padding-left:8px}}

.masthead{max-width:1180px;margin:18px auto 10px;padding:14px 18px;display:flex;gap:22px;align-items:center;
  border:4px ridge var(--aqua);background:var(--navy)}
.mast-text{flex:1;min-width:0;text-align:center}
.welcome{margin:0;font-family:"Comic Sans MS","Comic Sans",cursive;color:var(--aqua-light);font-size:17px}
.masthead h1{margin:6px 0 4px;font-size:clamp(34px,6vw,62px);line-height:1.05;color:#fff;letter-spacing:.5px;
  text-shadow:3px 3px 0 var(--aqua-ink),-1px -1px 0 var(--aqua)}
.subtitle{margin:0 0 8px;font-style:italic;font-size:21px;color:var(--text-on-dark)}
.byline{margin:0 0 10px;font-size:16px;color:#cbd5e1}
.jump{margin:0}
.bevel{display:inline-block;margin:3px;padding:3px 12px;background:#c9d3da;color:#0d1419 !important;
  border:2px outset #f1f5f9;font-family:Arial,Helvetica,sans-serif;font-size:14px;font-weight:bold;text-decoration:none;cursor:pointer}
.bevel:active{border-style:inset}
.mascot{margin:0;flex:0 0 170px;text-align:center}
.mascot img{width:170px;height:auto;background:#fff;border:3px inset #c9d3da}
.mascot figcaption{font-size:12px;line-height:1.3;color:#cbd5e1;margin-top:4px}

.frame{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:230px minmax(0,1fr);gap:16px;padding:0 10px}
.index-frame{grid-template-columns:minmax(0,1fr);max-width:900px}
.post-card{border:3px ridge var(--aqua);background:var(--canvas);padding:14px 18px;margin:1em 0}
.post-card h3{margin:.2em 0;font-size:28px}
.side{align-self:start;position:sticky;top:8px;max-height:calc(100vh - 16px);overflow:auto;
  background:var(--navy);border:3px ridge var(--aqua);padding:10px 12px;font-family:Arial,Helvetica,sans-serif;font-size:14px}
.side-head{margin:8px 0 4px;font-family:"Space Mono","Courier New",monospace;font-size:12px;letter-spacing:.08em;color:var(--aqua)}
.side ol,.side ul{margin:0 0 8px;padding-left:22px}
.side ol.roman{list-style:none;padding-left:4px}
.side li{margin:3px 0;line-height:1.3}

.paper{background:var(--paper);color:var(--ink);border:4px ridge #c9d3da;padding:26px clamp(16px,4vw,46px) 34px;min-width:0}
.paper h2{font-family:Arial,Helvetica,sans-serif;font-size:30px;line-height:1.15;margin:.3em 0 .5em;color:#0d1419}
.paper h3{font-family:Arial,Helvetica,sans-serif;font-size:21px;margin:1.5em 0 .3em;color:#0d1419}
.paper p{margin:.7em 0}
.chapter{border-top:6px double var(--aqua);margin-top:2.6em;padding-top:1.1em}
.kicker{margin:0;font-family:"Space Mono","Courier New",monospace;font-size:13px;letter-spacing:.08em;color:var(--aqua-ink);font-weight:bold}
.ask{margin:.2em 0 .9em;padding:8px 14px;background:var(--canvas);border-left:6px solid var(--aqua-ink)}
.ask h3{margin:0;font-size:18px;font-style:italic;color:var(--aqua-ink)}
.ask h3::before{content:"People ask: ";font-style:normal;font-weight:normal;color:var(--muted);font-size:14px}
.ask p{margin:.25em 0 0;font-size:16.5px}
.xlink{font-family:Arial,Helvetica,sans-serif;font-size:14px;background:var(--canvas);border:1px dashed var(--aqua-ink);padding:5px 10px}
.takeaway{background:#e8f6fc;border-left:6px solid var(--aqua);padding:10px 14px;margin:1.3em 0}
.why{font-size:16px;color:#374151;border-left:3px dotted var(--aqua-ink);padding-left:12px}
.pull{text-align:center;font-family:Arial,Helvetica,sans-serif;font-weight:bold;font-size:25px;line-height:1.25;margin:1.2em 0;color:#0d1419}
.m{white-space:nowrap}
.m i,.paper i.v{font-family:"Times New Roman",Times,serif}
.tag{display:inline-block;font-family:Arial,Helvetica,sans-serif;font-size:10.5px;font-weight:bold;letter-spacing:.04em;
  color:#fff;padding:1px 5px;vertical-align:1px;white-space:nowrap}
.tag-exact{background:var(--exact)}.tag-meas{background:var(--meas)}.tag-pub{background:var(--pub)}
.tag-ours{background:var(--ours)}.tag-claim{background:var(--claim)}
.fig{margin:1.5em 0;text-align:center}
.fig img{max-width:100%;height:auto;background:#fff}
.fig figcaption{font-size:15.5px;line-height:1.4;text-align:left;color:#374151;margin-top:6px}
.tablewrap{overflow-x:auto;margin:1.2em 0}
table{border-collapse:collapse;margin:0 auto;min-width:min(100%,560px);font-family:Arial,Helvetica,sans-serif;font-size:14.5px;line-height:1.35}
caption{caption-side:top;text-align:left;font-family:"Times New Roman",Times,serif;font-size:15.5px;color:#374151;padding-bottom:6px}
th,td{border:1px solid var(--rule);padding:5px 9px;text-align:left;vertical-align:top}
th{background:#dbeef8}
tr:nth-child(even) td{background:var(--canvas)}
table.glossary td:first-child{font-weight:bold;white-space:nowrap}
.eq{display:block;overflow-x:auto;margin:.4em 0}
.runin{font-style:italic;font-weight:bold}
.cite{text-decoration:none}
sup.fn a{text-decoration:none}
.sources,.notes ol{font-size:16px}
.sources li{margin:.45em 0}
.abstract .full-title{font-size:27px}
.affil{font-family:Arial,Helvetica,sans-serif;font-size:14px;color:var(--muted)}
.faq h3{margin-top:1.1em}
.cite-box pre{background:var(--canvas);border:2px inset #c9d3da;padding:10px;overflow-x:auto;font-size:13px}
.terms p{font-size:16px;color:#374151}

/* the guestbook */
.guestbook{margin-top:2.4em;padding:14px 18px 18px;border:4px ridge var(--aqua);background:var(--canvas)}
.guestbook h2{margin-top:0}
.gb{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px 14px;align-items:end}
.gb label{display:block;font-family:Arial,Helvetica,sans-serif;font-size:13px;font-weight:bold}
.gb input:not([type=checkbox]),.gb textarea{display:block;width:100%;margin-top:3px;padding:5px 6px;border:2px inset #c9d3da;
  background:#fff;font-family:"Courier New",monospace;font-size:15px;color:var(--ink)}
.gb .wide,.gb .check{grid-column:1/-1}
.gb .check{font-weight:normal;font-size:14px}
.gb button{justify-self:start;font-size:15px;padding:5px 18px}
.small-ink{font-size:13.5px;color:var(--muted)}

/* the advertisements: few, labelled, and the only thing here set in the brand's own type */
.ad{font-family:"DM Sans",Arial,sans-serif;margin:16px auto;max-width:728px;text-align:center}
.ad-label{display:block;font-family:"Space Mono","Courier New",monospace;font-size:10.5px;letter-spacing:.12em;color:#94a3b8;margin-bottom:3px}
.paper .ad-label{color:var(--muted)}
.ad a{display:flex;align-items:center;gap:14px;text-decoration:none;color:#0d1419;background:var(--aqua);
  border:4px outset var(--aqua-light);padding:9px 14px;text-align:left}
.ad a:hover{border-style:inset}
.ad-logo{flex:0 0 auto;width:72px;height:72px;background:#fff;border:2px inset #c9d3da;padding:2px}
/* One phone cut out of the three-phone Ither picture (1000 x 500) and stood upright. Measured in that picture: each
   phone is 231 x 467 and leans 32 degrees to the left; the conversation's center is at (506, 249), the report's
   at (788, 249). The box is the phone's own outline; the picture is scaled, shifted and turned behind it. */
.ad-phone{flex:0 1 auto;display:block;position:relative;overflow:hidden;aspect-ratio:231/467;min-width:0;max-width:100%}
.ad-phone img{position:absolute;display:block;max-width:none;height:auto}
.ad-phone.talk img{width:432.3%;left:-168.7%;top:-3.2%;transform-origin:50.59% 49.72%;transform:rotate(31.62deg)}
.ad-phone.report img{width:432%;left:-290.4%;top:-3.1%;transform-origin:78.81% 49.72%;transform:rotate(32.2deg)}
.ad-tower .ad-phone{width:100%;max-width:176px}
.ad-pair{flex:0 1 auto;display:flex;align-items:center;justify-content:center;gap:6px;min-width:0;max-width:100%}
.ad-pair .ad-phone{width:118px}
.ad-arrow{flex:0 0 auto;font-weight:700;font-size:22px}
/* where the two phones and the words do not fit side by side, the words go underneath */
.ad-box a{flex-wrap:wrap;justify-content:center}
.ad-box .ad-copy{flex:1 1 200px}
.ad-copy{flex:1;min-width:0}
.ad-head{display:block;font-weight:700;font-size:20px;letter-spacing:.02em;line-height:1.2}
.ad-body{display:block;font-size:14.5px;line-height:1.35;margin:3px 0 6px}
.ad-btn{display:inline-block;background:#0d1419;color:#fff;font-weight:700;font-size:13px;padding:3px 12px;border:2px outset #94a3b8}
.ad-banner .ad-head{animation:blink 1.6s steps(2,start) 4}
@keyframes blink{50%{opacity:.25}}
@media (prefers-reduced-motion:reduce){.ad-banner .ad-head{animation:none}}
.ad-tower{margin:14px 0 4px}
.ad-tower a{flex-direction:column;text-align:center;padding:12px 8px;gap:8px}
.ad-tower .ad-head{font-size:17px}
.ad-box{max-width:560px;margin:2.2em auto}
.ad-wanted a{background:#fffbe6;border:4px dashed var(--aqua-ink);color:var(--ink);text-align:center}
.ad-wanted .ad-head{font-family:"Courier New",monospace;font-size:19px}
.ad-wanted .ad-btn{background:var(--aqua-ink)}
.paper .ad-wanted{margin:2.4em auto}

.foot{max-width:1180px;margin:20px auto 40px;padding:14px 18px;text-align:center;font-family:Arial,Helvetica,sans-serif;font-size:14px;
  border:4px ridge var(--aqua);background:var(--navy)}
.postnav{border:2px groove #94a3b8;padding:6px;margin-bottom:10px}
.sponsor{margin:8px 0 0;font-family:"Space Mono","Courier New",monospace;font-size:12.5px;letter-spacing:.06em;color:#cbd5e1}
.sponsor-foot{margin:4px 0 12px}
.sponsor-foot a{display:inline-flex;align-items:center;gap:10px;font-family:"DM Sans",Arial,sans-serif;font-weight:700;font-size:16px;
  color:#fff !important;text-decoration:none}
.sponsor-foot img{background:#fff;border:2px inset #c9d3da;padding:2px}
.small{font-size:12.5px;color:#cbd5e1}
.badges{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:12px 0}
.badge{font-size:10.5px;line-height:1.25;padding:4px 8px;border:2px outset #94a3b8;background:#c9d3da;color:#0d1419;min-width:88px}

@media (max-width:900px){
  body{font-size:17px}
  .frame{grid-template-columns:minmax(0,1fr)}
  .side{position:static;max-height:none}
  .side ol{columns:2}
  .masthead{flex-direction:column}
  .ad-tower{display:none}
  .gb{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:520px){.ad a{flex-direction:column;text-align:center}}
@media print{
  body{background:#fff;color:#000}.ticker,.ad,.side,.foot,.mascot,.jump,.xlink,.guestbook{display:none}
  .frame{display:block}.paper{border:0;padding:0}
}