/* onlinemedicalcodingtraining.com - chart-room palette, system fonts, mobile first */
:root{
  --paper:#f5f3ee;--card:#ffffff;--ink:#14212b;--muted:#46555f;--line:#d6cfc0;--line2:#e9e4d8;
  --teal:#0b6b66;--teal-ink:#07504c;--teal-tint:#e1efec;--gold:#7d5200;--gold-tint:#fbf0d9;
  --red:#9b1c1c;--red-tint:#fdeaea;--focus:#e8912a;--head:#13202a;--head-link:#a8e3db;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--sans);overflow-wrap:break-word}
img,svg{max-width:100%;height:auto}
a{color:var(--teal-ink);text-underline-offset:2px}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--card);padding:8px 12px;z-index:10}
.skip:focus{left:8px;top:8px}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
/* header */
.site-head{background:var(--head);color:#fff}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700;letter-spacing:.01em;line-height:1.2;font-size:1rem}
.brand:hover{color:#fff}
.brand svg{width:30px;height:30px;flex:0 0 30px}
.brand small{display:block;font-weight:400;font-size:.72rem;color:#c9d6dc;letter-spacing:.02em}
@media (max-width:600px){.brand small{display:none}.brand svg{width:26px;height:26px;flex-basis:26px}}
.nav{position:relative}
.menu-btn{appearance:none;background:transparent;cursor:pointer;color:var(--head-link);border:1px solid #39505e;border-radius:6px;padding:6px 12px;font:inherit;font-size:.92rem;min-height:40px}
.nav ul{list-style:none;margin:0;padding:0}
.nav ul.menu{display:none;position:absolute;right:0;top:calc(100% + 8px);background:var(--head);border:1px solid #39505e;border-radius:8px;padding:6px;width:min(280px,calc(100vw - 32px));z-index:5;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.nav ul.menu.open{display:block}
.nav a{display:block;color:var(--head-link);text-decoration:none;padding:8px 10px;border-radius:6px;font-size:.95rem;white-space:nowrap}
.nav a:hover,.nav a[aria-current="page"]{background:#22343f;color:#fff}
@media (min-width:1100px){
  .menu-btn{display:none}
  .nav ul.menu{display:flex;position:static;background:none;border:0;padding:0;width:auto;box-shadow:none;gap:2px}
  .nav a{font-size:.86rem;padding:6px 8px}
}
/* breadcrumbs */
.crumbs{font-size:.85rem;color:var(--muted);margin:14px 0 0}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:4px}
.crumbs li+li::before{content:"/";margin-right:4px;color:#8a949b}
/* headings and text */
h1{font-size:1.55rem;line-height:1.22;margin:14px 0 10px;letter-spacing:-.01em}
h2{font-size:1.28rem;line-height:1.3;margin:34px 0 10px;letter-spacing:-.005em}
h3{font-size:1.06rem;margin:22px 0 6px}
p{margin:0 0 12px}
.lede{color:var(--muted);margin:0 0 14px;font-size:.98rem}
@media (min-width:720px){h1{font-size:2.05rem;margin-top:22px}h2{font-size:1.45rem}}
main{padding-bottom:24px}
.section{background:var(--card);border:1px solid var(--line2);border-radius:10px;padding:16px 16px 6px;margin:18px 0}
code,.code{font-family:var(--mono);font-size:.92em;background:var(--teal-tint);padding:1px 5px;border-radius:4px}
blockquote{margin:12px 0;padding:10px 14px;border-left:4px solid var(--teal);background:var(--teal-tint);border-radius:0 8px 8px 0}
blockquote p{margin:0 0 6px}
blockquote cite{display:block;font-style:normal;font-size:.85rem;color:var(--muted)}
.note{font-size:.88rem;color:var(--muted)}
.asof{display:inline-block;font-size:.85rem;background:var(--gold-tint);color:var(--gold);border-radius:999px;padding:3px 12px;margin:4px 0 12px}
/* tool card */
.tool{background:var(--card);border:1px solid var(--line);border-top:5px solid var(--teal);border-radius:12px;padding:14px 14px 16px;margin:4px 0 18px;box-shadow:0 1px 0 rgba(20,33,43,.04)}
.tool-title{display:flex;align-items:center;gap:8px;margin:0 0 10px;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--teal-ink);font-weight:700}
.tool-title::before{content:"";width:10px;height:10px;border-radius:2px;background:var(--teal)}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:10px 12px}
.field{display:flex;flex-direction:column;gap:4px;min-width:0}
.field.full{grid-column:1/-1}
.field label,.field .lbl{font-size:.86rem;font-weight:600;color:var(--ink)}
.field .hint{font-size:.78rem;color:var(--muted);line-height:1.35}
select,input[type="text"],input[type="number"],input[type="date"],input[type="search"]{width:100%;min-width:0;min-height:44px;border:1px solid #8d9aa3;border-radius:7px;background:#fff;color:var(--ink);font:inherit;font-size:16px;padding:8px 10px}
select{padding-right:28px}
.inline{display:flex;gap:8px;align-items:center}
.check{display:flex;gap:8px;align-items:flex-start;font-size:.9rem}
.check input{width:20px;height:20px;margin:2px 0 0;flex:0 0 20px}
.btns{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.btn{white-space:nowrap;appearance:none;border:0;border-radius:8px;background:var(--teal);color:#fff;font:inherit;font-weight:700;padding:11px 18px;min-height:44px;cursor:pointer}
.btn:hover{background:var(--teal-ink)}
.btn.ghost{background:transparent;color:var(--teal-ink);border:1px solid var(--teal)}
.btn.small{padding:6px 12px;min-height:36px;font-size:.88rem}
.err{display:none;margin:12px 0 0;padding:10px 12px;background:var(--red-tint);color:var(--red);border-radius:8px;font-size:.92rem}
.err.on{display:block}
.results{margin-top:14px;border-top:1px dashed var(--line);padding-top:12px}
.results[hidden]{display:none}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.stat{background:var(--paper);border:1px solid var(--line2);border-radius:9px;padding:10px 12px;min-width:0}
.stat .k{font-size:.76rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;line-height:1.3}
.stat .v{font-size:1.35rem;font-weight:750;font-variant-numeric:tabular-nums;line-height:1.25;margin-top:2px}
.stat .s{font-size:.78rem;color:var(--muted);line-height:1.35;margin-top:2px}
.stat.hl{background:var(--teal-tint);border-color:#b9d8d3}
.stat.hl .v{color:var(--teal-ink)}
.breakdown{width:100%;border-collapse:collapse;margin-top:12px;font-size:.9rem}
.breakdown td{padding:6px 4px;border-bottom:1px solid var(--line2);vertical-align:top}
.breakdown td:last-child{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.breakdown tr.total td{font-weight:700;border-bottom:0}
.breakdown.wrap td:last-child{white-space:normal;text-align:left}
.breakdown.wrap td:first-child{width:28%;color:var(--muted)}
.src{font-size:.8rem;color:var(--muted);margin-top:10px}
@media (max-width:420px){.fields{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.stat .v{font-size:1.15rem}}
@media (min-width:720px){.tool{padding:18px 20px 20px}.stats{grid-template-columns:repeat(4,1fr)}.stat .v{font-size:1.45rem}}
/* tables */
.table-wrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line2);border-radius:8px;background:var(--card);margin:10px 0 14px}
table.data{border-collapse:collapse;width:100%;font-size:.9rem}
table.data.wide{min-width:640px}
table.data caption{text-align:left;font-size:.85rem;color:var(--muted);padding:8px 10px;caption-side:top}
table.data th,table.data td{padding:8px 10px;border-bottom:1px solid var(--line2);text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
table.data th:first-child,table.data td:first-child{text-align:left;white-space:normal}
table.data thead th{background:#eef2f0;font-size:.8rem;color:var(--ink);position:relative}
table.data tbody tr:nth-child(even){background:#faf9f6}
table.data tbody tr.picked{background:var(--gold-tint)}
table.data td.l,table.data th.l{text-align:left;white-space:normal}
th button.sort{all:unset;cursor:pointer;display:inline-flex;gap:4px;align-items:center;font-weight:700}
th button.sort:focus-visible{outline:3px solid var(--focus)}
th button.sort::after{content:"";border:4px solid transparent;border-top-color:#8a949b;margin-top:4px}
th button.sort[data-dir="asc"]::after{border-top-color:transparent;border-bottom-color:var(--teal);margin-top:-4px}
th button.sort[data-dir="desc"]::after{border-top-color:var(--teal)}
.filter{display:flex;gap:8px;align-items:center;margin:8px 0}
.filter label{font-size:.86rem;font-weight:600;white-space:nowrap}
/* compare grid */
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
.cmp .col{background:var(--paper);border:1px solid var(--line2);border-radius:9px;padding:10px 12px;min-width:0}
.cmp h3{margin:0 0 6px;font-size:.98rem}
.cmp dl{margin:0;display:grid;grid-template-columns:1fr auto;gap:4px 10px;font-size:.88rem}
.cmp dt{color:var(--muted)}
.cmp dd{margin:0;text-align:right;font-variant-numeric:tabular-nums;font-weight:650}
@media (max-width:420px){.cmp dl{grid-template-columns:1fr}.cmp dd{text-align:left;margin-bottom:4px}}
/* ICD list */
.codes{list-style:none;margin:10px 0 0;padding:0;border:1px solid var(--line2);border-radius:8px;background:var(--card)}
.codes li{display:grid;grid-template-columns:92px 1fr;gap:8px;padding:7px 10px;border-bottom:1px solid var(--line2);font-size:.9rem}
.codes li:last-child{border-bottom:0}
.codes .cd{font-family:var(--mono);font-weight:700}
.codes .hdr .cd{color:var(--muted)}
.tag{display:inline-block;font-size:.72rem;font-weight:700;border-radius:999px;padding:1px 8px;margin-left:6px;vertical-align:1px}
.tag.ok{background:var(--teal-tint);color:var(--teal-ink)}
.tag.no{background:var(--gold-tint);color:var(--gold)}
.linkbtn{all:unset;cursor:pointer;color:var(--teal-ink);text-decoration:underline;text-underline-offset:2px}
.linkbtn:focus-visible{outline:3px solid var(--focus)}
/* faq */
.faq details{background:var(--card);border:1px solid var(--line2);border-radius:9px;margin:8px 0;padding:0 14px}
.faq summary{cursor:pointer;font-weight:650;padding:12px 0;list-style-position:outside}
.faq details[open] summary{border-bottom:1px solid var(--line2);margin-bottom:10px}
.faq details>div{padding-bottom:6px}
/* steps, lists */
.formula{font-family:var(--mono);font-size:.88rem;background:var(--paper);border:1px solid var(--line2);border-radius:8px;padding:10px 12px;overflow-x:auto;white-space:pre-wrap}
ol.sources{padding-left:20px;font-size:.88rem}
ol.sources li{margin:0 0 8px}
.cards{display:grid;grid-template-columns:1fr;gap:10px;margin:12px 0}
.cards a{display:block;background:var(--card);border:1px solid var(--line2);border-left:4px solid var(--teal);border-radius:8px;padding:10px 12px;text-decoration:none;color:var(--ink)}
.cards a strong{display:block;color:var(--teal-ink)}
.cards a span{font-size:.88rem;color:var(--muted)}
@media (min-width:720px){.cards{grid-template-columns:1fr 1fr 1fr}}
/* ad slots: reserved space, no layout shift */
.ad-slot{display:block;width:100%;margin:18px 0;overflow:hidden}
.ad-top{min-height:100px}
.ad-in{min-height:250px}
.ad-side{min-height:250px}
.ad-bottom{min-height:90px}
/* footer */
.site-foot{background:var(--head);color:#c9d6dc;margin-top:28px;padding:22px 0 30px;font-size:.88rem}
.site-foot a{color:var(--head-link)}
.site-foot ul{list-style:none;padding:0;margin:0 0 12px;display:flex;flex-wrap:wrap;gap:6px 16px}
.site-foot p{margin:0 0 8px}
@media print{.site-head,.site-foot,.ad-slot,.nav{display:none}}