/* freightclass.co — shared stylesheet */
:root{
  --ink:#0F2430; --ink-2:#1D3D4C; --slate:#5B7482; --slate-lt:#8CA2AD;
  --bg:#E8ECEE; --card:#FFFFFF; --line:#CBD5DA; --line-lt:#E4EAED;
  --signal:#FFB800; --alert:#C0391B; --alert-bg:#FDF0EC;
  --tap:52px; --gutter:16px; --barh:68px; --anchor:0px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Barlow",system-ui,-apple-system,sans-serif;
  font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;padding-bottom:var(--anchor);
}
h1,h2,h3{font-family:"Barlow Condensed","Barlow",sans-serif;font-weight:700;line-height:1.05;margin:0}
a{color:var(--ink-2)}
.wrap{max-width:1180px;margin:0 auto;
  padding-left:max(var(--gutter),env(safe-area-inset-left));
  padding-right:max(var(--gutter),env(safe-area-inset-right))}
@media(min-width:760px){:root{--gutter:28px}}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;z-index:200;background:#fff;padding:10px 14px;border:2px solid var(--ink)}

/* ---------- masthead (inner pages) ---------- */
.mast{background:var(--ink);color:#fff;border-bottom:4px solid var(--signal);padding-top:env(safe-area-inset-top)}
.mast .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:62px;flex-wrap:wrap}
.brand{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:21px;letter-spacing:.01em;color:#fff;text-decoration:none;display:flex;align-items:center;gap:7px}
.brand b{background:var(--signal);color:var(--ink);padding:0 7px;font-weight:700}
.mast nav{display:flex;gap:16px;font-size:15px;flex-wrap:wrap}
.mast nav a{color:#C0D0D8;text-decoration:none}
.mast nav a:hover,.mast nav a[aria-current=page]{color:#fff;text-decoration:underline}

/* ---------- sticky live readout (calculator pages) ---------- */
.readout{position:sticky;top:0;z-index:60;background:var(--ink);color:#fff;border-bottom:4px solid var(--signal);padding-top:env(safe-area-inset-top)}
.readout .wrap{display:flex;align-items:center;gap:12px;min-height:var(--barh);padding-top:8px;padding-bottom:8px}
.classbox{display:flex;align-items:baseline;gap:8px;flex:0 0 auto;min-width:0}
.classbox .lbl{font-family:"Barlow Condensed",sans-serif;font-weight:600;font-size:13px;color:var(--signal);line-height:1.05;width:46px}
.classbox .val{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:52px;line-height:.88;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.classbox.idle{gap:0}
.classbox.idle .lbl{display:none}
.classbox.idle .val{font-size:17px;color:var(--slate-lt);font-weight:600;line-height:1.25;width:auto}
.metrics{display:flex;gap:20px;margin-left:auto;flex-wrap:nowrap;flex:0 0 auto}
.metric{text-align:right}
.metric .k{font-size:11.5px;color:var(--slate-lt);line-height:1.25;white-space:nowrap}
.metric .v{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:22px;font-variant-numeric:tabular-nums;line-height:1.15;white-space:nowrap}
.flag{background:var(--signal);color:var(--ink);font-size:14px;font-weight:600;padding:7px 0;display:none;line-height:1.35}
.flag.on{display:block}
.flag .wrap{display:flex;gap:8px;align-items:flex-start}
.flag svg{flex:0 0 auto;margin-top:3px}
@media(max-width:700px){
  :root{--barh:60px;--tap:50px}
  .classbox .val{font-size:40px}
  .classbox .lbl{font-size:11.5px;width:40px}
  .classbox.idle .val{font-size:15.5px}
  .metrics{gap:14px}.metric .v{font-size:19px}.metric .k{font-size:11px}
  .metric.hide-sm{display:none}
  .flag{font-size:13px;padding:6px 0}
}
@media(max-width:360px){.metrics{gap:10px}.metric .v{font-size:17px}.classbox .val{font-size:34px}}
@media(max-height:480px) and (orientation:landscape){
  :root{--barh:48px}.classbox .val{font-size:32px}.metric .v{font-size:17px}.flag{font-size:12.5px;padding:4px 0}
}

.crumbs{font-size:13.5px;color:var(--slate);padding:14px 0 0}
.crumbs a{color:var(--slate)}
.intro{padding:20px 0 2px}
h1{font-size:clamp(27px,6.4vw,40px)}
.intro p{color:var(--slate);margin:8px 0 0;max-width:60ch;font-size:16px}

/* ---------- calculator card ---------- */
.card{background:var(--card);border:1px solid var(--line);margin:18px 0}
.card-hd{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px var(--gutter);border-bottom:1px solid var(--line-lt)}
.card-hd h2{font-size:20px}
.units{display:flex;border:1px solid var(--line);flex:0 0 auto}
.units button{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:15.5px;background:#fff;color:var(--slate);border:0;padding:0 14px;height:42px;cursor:pointer;white-space:nowrap}
.units button[aria-pressed=true]{background:var(--ink);color:#fff}
.units button:focus-visible{outline:3px solid var(--signal);outline-offset:-3px}
.presets{padding:13px 0 0}
.presets .cap{font-size:13px;color:var(--slate);margin-bottom:8px;padding:0 var(--gutter)}
.chips{display:flex;gap:8px;overflow-x:auto;padding:0 var(--gutter) 2px;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{font-family:"Barlow Condensed",sans-serif;font-weight:600;font-size:16px;background:#F2F5F6;border:1px solid var(--line);color:var(--ink);padding:0 15px;height:42px;cursor:pointer;white-space:nowrap;flex:0 0 auto;scroll-snap-align:start}
.chip:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.chip:focus-visible{outline:3px solid var(--signal);outline-offset:2px}
@media(min-width:760px){.chips{flex-wrap:wrap;overflow:visible}}

.rows{padding:12px var(--gutter) 4px}
.rowhd{display:none;padding:0 0 6px;font-size:12.5px;color:var(--slate);font-weight:600;gap:10px}
.row{border:1px solid var(--line-lt);margin-bottom:10px}
.row-top{display:flex;align-items:center;justify-content:space-between;background:#F4F7F8;border-bottom:1px solid var(--line-lt);padding:0 4px 0 12px;height:38px}
.row-top .nm{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:15.5px;color:var(--slate)}
.rm{width:38px;height:34px;background:transparent;border:0;color:var(--slate);font-size:20px;line-height:1;cursor:pointer}
.rm:hover{color:var(--alert)}
.rm:focus-visible{outline:3px solid var(--signal);outline-offset:-2px}
.row-body{padding:4px 12px 10px}
.fld{display:flex;align-items:center;gap:10px;padding:6px 0;border-bottom:1px solid var(--line-lt)}
.fld:last-child{border-bottom:0}
.fld label{flex:0 0 68px;margin:0;font-size:14.5px;color:var(--ink);font-weight:600}
.fld .ip{flex:1 1 auto;min-width:0}
.fld .suf{flex:0 0 34px;font-size:14px;color:var(--slate);font-weight:600}
label{display:block;font-size:12px;color:var(--slate);margin-bottom:4px;font-weight:600}
input[type=number],input[type=text],input[type=email],textarea{
  width:100%;font-family:"Barlow",sans-serif;font-size:20px;font-weight:600;font-variant-numeric:tabular-nums;
  padding:0 8px;border:1.5px solid var(--line);border-radius:0;background:#FBFCFC;color:var(--ink);
}
input[type=number]{height:var(--tap);min-width:0;text-align:center;scroll-margin-top:calc(var(--barh) + 60px)}
input:focus{background:#fff}
input:focus-visible{outline:3px solid var(--signal);outline-offset:-1px;border-color:var(--ink)}
input::-webkit-outer-spin-button,input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
input[type=number]{-moz-appearance:textfield}
@media(min-width:760px){
  .rowhd{display:grid;grid-template-columns:1fr 1fr 1fr 1.2fr .8fr 44px}
  .row{border:0;border-top:1px solid var(--line-lt);margin-bottom:0}
  .rowhd + .row{border-top:0}
  .row-top{display:none}
  .row-body{display:grid;grid-template-columns:1fr 1fr 1fr 1.2fr .8fr 44px;gap:10px;align-items:end;padding:11px 0}
  .fld{display:block;padding:0;border:0}
  .fld label,.fld .suf{display:none}
  .rm-slot{display:block}
  .rm{width:44px;height:var(--tap);border:1.5px solid var(--line);background:#fff}
  input[type=number]{text-align:left;padding:0 10px;font-size:19px}
}
.rm-slot{display:none}

.card-ft{display:flex;gap:9px;flex-wrap:wrap;align-items:center;padding:12px var(--gutter) 16px;border-top:1px solid var(--line-lt);margin-top:6px}
.btn{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:16.5px;height:50px;padding:0 18px;cursor:pointer;border:1.5px solid var(--ink);background:#fff;color:var(--ink);flex:1 1 auto;min-width:0;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.btn:hover{background:var(--ink);color:#fff}
.btn-primary{background:var(--signal);border-color:var(--signal);color:var(--ink);flex:1 1 100%;order:-1;font-size:19px;height:54px}
.btn-primary:hover{background:#E8A800;border-color:#E8A800;color:var(--ink)}
.btn:focus-visible{outline:3px solid var(--ink);outline-offset:2px}
.btn:disabled{opacity:.4;cursor:default}
.btn:disabled:hover{background:#fff;color:var(--ink)}
.hint{font-size:13.5px;color:var(--slate);margin:2px 0 0;flex:1 1 100%}
@media(min-width:760px){
  .btn{flex:0 0 auto}
  .btn-primary{flex:0 0 auto;order:0}
  .hint{flex:1 1 auto;text-align:right;margin:0 0 0 auto;max-width:32ch}
}

/* ---------- results ---------- */
.results{background:var(--card);border:1px solid var(--line);margin:18px 0;scroll-margin-top:calc(var(--barh) + 12px)}
.results h2{padding:13px var(--gutter);font-size:20px;border-bottom:1px solid var(--line-lt)}
.res-list{padding:0 var(--gutter)}
.res{display:flex;align-items:baseline;gap:12px;padding:13px 0;border-bottom:1px solid var(--line-lt)}
.res:last-child{border-bottom:0}
.res .k{flex:1 1 auto;font-size:16px;color:var(--slate);font-weight:600}
.res .v{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:26px;font-variant-numeric:tabular-nums}
.res .u{flex:0 0 auto;font-size:14px;color:var(--slate);width:66px}
.res.hero{background:#FFF9E8;margin:0 calc(var(--gutter) * -1);padding:15px var(--gutter);border-bottom:1px solid var(--line-lt)}
.res.hero .k{font-size:17px;color:var(--ink)}
.res.hero .v{font-size:44px;line-height:.95;color:var(--ink)}
.res-note{padding:12px var(--gutter) 16px;font-size:14.5px;color:var(--slate);border-top:1px solid var(--line-lt)}
.res-note strong{color:var(--ink)}
.res-ft{padding:0 var(--gutter) 16px}
.res-ft .btn{width:100%;flex:none}
.results.empty .res-list,.results.empty .res-note,.results.empty .res-ft{display:none}
.res-empty{display:none;padding:20px var(--gutter);color:var(--slate);font-size:15.5px}
.results.empty .res-empty{display:block}

/* ---------- ads ---------- */
.ad{margin:22px 0;display:flex;flex-direction:column;align-items:center;background:#DFE5E8;border:1px solid var(--line);padding:10px}
.ad::before{content:"Advertisement";font-size:10.5px;letter-spacing:.06em;color:var(--slate-lt);margin-bottom:7px;text-transform:uppercase}
.ad-inner{width:100%;display:flex;align-items:center;justify-content:center;color:var(--slate-lt);font-size:12.5px;background:#D3DBDF}
.ad-result .ad-inner{min-height:280px}
.ad-article .ad-inner{min-height:250px}
.ad-rail .ad-inner{min-height:600px}
.anchor{position:fixed;left:0;right:0;bottom:0;z-index:70;background:#DFE5E8;border-top:1px solid var(--line);padding:4px 0 calc(4px + env(safe-area-inset-bottom));display:none}
.anchor.on{display:block}
.anchor .inner{height:50px;display:flex;align-items:center;justify-content:center;color:var(--slate-lt);font-size:12px;background:#D3DBDF;margin:0 44px 0 12px}
.anchor .x{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:34px;height:34px;border:1px solid var(--line);background:#fff;color:var(--slate);font-size:17px;line-height:1;cursor:pointer}
.anchor .x:focus-visible{outline:3px solid var(--signal);outline-offset:2px}
@media(min-width:1000px){.anchor{display:none !important}}

details.work{background:var(--card);border:1px solid var(--line);margin:18px 0}
details.work summary{cursor:pointer;padding:13px var(--gutter);font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:18px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:10px}
details.work summary::-webkit-details-marker{display:none}
details.work summary::after{content:"+";font-size:25px;color:var(--slate);line-height:1}
details.work[open] summary::after{content:"\2013"}
details.work summary:focus-visible{outline:3px solid var(--signal);outline-offset:-3px}
.work-body{padding:0 var(--gutter) 16px;border-top:1px solid var(--line-lt)}
.step{padding:11px 0;border-bottom:1px solid var(--line-lt);font-variant-numeric:tabular-nums}
.step:last-child{border-bottom:0}
.step .t{font-size:13px;color:var(--slate);font-weight:600;margin-bottom:2px}
.step .e{font-family:"Barlow Condensed",sans-serif;font-weight:600;font-size:19px;word-break:break-word}

.ladder{background:var(--card);border:1px solid var(--line);margin:18px 0}
.ladder h2{padding:13px var(--gutter);font-size:20px;border-bottom:1px solid var(--line-lt)}
.ladder-scroll{max-height:272px;overflow-y:auto;-webkit-overflow-scrolling:touch}
@media(min-width:760px){.ladder-scroll{max-height:none;overflow:visible}}
table{border-collapse:collapse;width:100%;table-layout:fixed}
th,td{text-align:left;padding:10px var(--gutter);font-size:16px;font-variant-numeric:tabular-nums}
th{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:14px;color:var(--slate);padding-top:11px;padding-bottom:7px;position:sticky;top:0;background:var(--card);z-index:1}
tbody tr{border-top:1px solid var(--line-lt)}
td.c,th.c{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:19px;width:84px}
th.c{font-size:14px}
tr.hit{background:var(--signal)}
tr.hit td{font-weight:700}
tr.near{background:#FFF6DC}
td a{color:var(--ink-2)}

.quote{background:var(--ink-2);color:#fff;padding:20px var(--gutter);margin:20px 0;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
.quote h2{font-size:22px}
.quote p{margin:5px 0 0;color:#B6C9D2;font-size:15px;max-width:44ch}
.quote a{background:var(--signal);color:var(--ink);text-decoration:none;font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:17px;padding:14px 22px;white-space:nowrap;flex:1 1 auto;text-align:center}
@media(min-width:600px){.quote a{flex:0 0 auto}}

.split{display:block}
.rail{display:none}
@media(min-width:1000px){
  .split{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:36px;align-items:start}
  .rail{display:block;position:sticky;top:calc(var(--barh) + 20px)}
  .rail .ad{margin-top:0}
}

.prose{max-width:68ch;padding-bottom:8px}
.prose h2{margin-top:32px;font-size:clamp(22px,4.6vw,28px)}
.prose h3{margin-top:20px;font-size:19px}
.prose p{margin:9px 0}
.prose ul,.prose ol{margin:9px 0;padding-left:19px}
.prose li{margin:5px 0}
.example{background:var(--card);border-left:5px solid var(--signal);padding:13px 16px;margin:15px 0;font-variant-numeric:tabular-nums}
.example p{margin:4px 0}
.disclaimer{border:1.5px solid var(--alert);background:var(--alert-bg);padding:13px 16px;margin:28px 0;font-size:15px}
.disclaimer strong{color:var(--alert)}
.callout{background:var(--card);border:1px solid var(--line);padding:16px;margin:20px 0}
.callout h3{font-size:19px;margin-bottom:6px}

.tiles{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(132px,1fr));margin:16px 0}
.tile{background:var(--card);border:1px solid var(--line);padding:12px;text-decoration:none;color:var(--ink);display:block}
.tile:hover{border-color:var(--ink)}
.tile .n{font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:24px;line-height:1}
.tile .d{font-size:13px;color:var(--slate);margin-top:3px}

.pager{display:flex;justify-content:space-between;gap:12px;margin:26px 0;font-size:15px;flex-wrap:wrap}
.pager a{background:var(--card);border:1px solid var(--line);padding:10px 14px;text-decoration:none;color:var(--ink)}
.pager a:hover{border-color:var(--ink)}

footer{background:var(--ink);color:#93AAB6;margin-top:36px;padding:26px 0;font-size:14px;padding-bottom:calc(26px + env(safe-area-inset-bottom))}
footer .wrap{display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between}
footer a{color:#BCCCD4}
footer nav{display:flex;gap:14px;flex-wrap:wrap}

@media print{
  .readout,.mast{position:static}
  .presets,.card-ft,.quote,footer,.units,.rm,.row-top,.ad,.anchor,.rail,.res-ft,.mast nav{display:none !important}
  body{background:#fff;font-size:12pt;padding-bottom:0}
  .ladder-scroll{max-height:none;overflow:visible}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* ---------- cookie consent ---------- */
#fc-consent{
  position:fixed;left:0;right:0;bottom:0;z-index:120;
  background:var(--ink);color:#E4EBEE;
  border-top:4px solid var(--signal);
  padding:14px 0 calc(14px + env(safe-area-inset-bottom));
}
.fc-c-inner{
  max-width:1180px;margin:0 auto;
  padding-left:max(var(--gutter),env(safe-area-inset-left));
  padding-right:max(var(--gutter),env(safe-area-inset-right));
  display:flex;gap:18px;align-items:center;flex-wrap:wrap;
}
.fc-c-txt{flex:1 1 340px;min-width:0}
.fc-c-txt strong{
  font-family:"Barlow Condensed",sans-serif;font-size:19px;font-weight:700;
  display:block;color:#fff;margin-bottom:2px;
}
.fc-c-txt p{margin:0;font-size:14.5px;line-height:1.45;color:#AFC2CB;max-width:70ch}
.fc-c-txt a{color:var(--signal)}
.fc-c-btns{display:flex;gap:9px;flex:0 0 auto;flex-wrap:wrap}
.fc-c-btns button{
  font-family:"Barlow Condensed",sans-serif;font-weight:700;font-size:16px;
  height:46px;padding:0 20px;cursor:pointer;border:1.5px solid #4A6472;
  background:transparent;color:#E4EBEE;
}
.fc-c-btns button:hover{border-color:#fff;color:#fff}
.fc-c-btns .fc-c-yes{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.fc-c-btns .fc-c-yes:hover{background:#E8A800;border-color:#E8A800;color:var(--ink)}
.fc-c-btns button:focus-visible{outline:3px solid #fff;outline-offset:2px}
@media(max-width:640px){
  .fc-c-inner{gap:12px}
  .fc-c-btns{width:100%}
  .fc-c-btns button{flex:1 1 auto}
  .fc-c-txt p{font-size:13.5px}
}
/* keep the mobile ad anchor clear of the consent bar */
#fc-consent ~ .anchor{bottom:var(--consent-h,0px)}
@media print{#fc-consent{display:none !important}}