/* actonnagecalc.com — shared stylesheet. Light default, dark via [data-theme=dark].
   Production note: replace Google Fonts with self-hosted JetBrains Mono woff2. */
:root{
  --bg:#f4f7fa; --bg-2:#eaf0f6; --panel:#ffffff; --panel-2:#f7fafc;
  --line:#d7e1ea; --line-soft:#e4ebf2;
  --text:#16222e; --text-dim:#48607a; --text-faint:#7e93a8;
  --accent:#0794c4; --accent-deep:#06769d; --accent-soft:rgba(7,148,196,.09);
  --warn:#c47a08; --ok:#0f9d63;
  --shadow:0 14px 40px rgba(22,42,60,.10); --r:10px;
}
[data-theme="dark"]{
  --bg:#0b0f14; --bg-2:#101720; --panel:#121a25; --panel-2:#0e151e;
  --line:#1f2c3a; --line-soft:#182332;
  --text:#dce7f2; --text-dim:#8aa0b6; --text-faint:#5a7088;
  --accent:#2dd4ff; --accent-deep:#0e9fc7; --accent-soft:rgba(45,212,255,.10);
  --warn:#ffb454; --ok:#5be39a;
  --shadow:0 18px 50px rgba(0,0,0,.45);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--bg);color:var(--text);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:44px 44px;opacity:.35;
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 0%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 0%,transparent 75%)}
.wrap{max-width:1100px;margin:0 auto;padding:0 22px;position:relative;z-index:1}
a{color:var(--accent)}

/* header */
header{border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(10px);position:sticky;top:0;z-index:50}
.hrow{display:flex;align-items:center;gap:14px;height:62px;flex-wrap:nowrap}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;letter-spacing:-.02em;white-space:nowrap}
.logo b{color:var(--accent)}
nav{margin-left:auto;display:flex;gap:2px;align-items:center}
nav a{color:var(--text-dim);text-decoration:none;font-size:13.5px;padding:7px 9px;border-radius:7px;white-space:nowrap}
nav a:hover{color:var(--text);background:var(--accent-soft)}
@media(max-width:760px){nav .hideS{display:none}}
@media(max-width:680px){
  .hrow{flex-wrap:wrap;height:auto;padding:8px 0;row-gap:6px}
  nav{order:3;width:100%;margin-left:0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  nav::-webkit-scrollbar{display:none}
  .market{margin-left:auto}
}
html,body{max-width:100%;overflow-x:clip}
.iconbtn{border:1px solid var(--line);background:var(--panel);color:var(--text-dim);width:36px;height:36px;border-radius:8px;cursor:pointer;display:grid;place-items:center;flex:none}
.iconbtn:hover{color:var(--accent);border-color:var(--accent)}
.market{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--panel);flex:none}
.market button{font-family:inherit;font-size:12px;font-weight:700;letter-spacing:.06em;padding:8px 12px;border:0;background:transparent;color:var(--text-faint);cursor:pointer}
.market button.on{background:var(--accent);color:#04222e}

/* hero + typography */
.hero{padding:48px 0 8px}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:11px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);border:1px solid var(--line);border-radius:99px;padding:6px 14px;background:var(--panel)}
.kicker .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
h1{font-size:clamp(26px,4.2vw,42px);font-weight:800;letter-spacing:-.035em;line-height:1.14;margin:16px 0 12px;max-width:800px}
h1 em{font-style:normal;color:var(--accent)}
.sub{color:var(--text-dim);max-width:700px;font-size:16px}
.sub strong{color:var(--text)}
h2{font-size:23px;font-weight:800;letter-spacing:-.02em;margin:0 0 6px}
h3{font-size:17px;font-weight:700;margin:22px 0 8px}
.lead{color:var(--text-dim);font-size:14.5px;margin-bottom:24px;max-width:680px}
section{padding:36px 0}
.crumbs{font-size:11.5px;color:var(--text-faint);padding:18px 0 0}
.crumbs a{color:var(--text-faint);text-decoration:none}
.crumbs a:hover{color:var(--accent)}

/* article / prose */
.prose{max-width:780px}
.prose p{margin:0 0 14px;color:var(--text-dim);font-size:15px}
.prose p strong,.prose li strong{color:var(--text)}
.prose ul,.prose ol{margin:0 0 14px 22px;color:var(--text-dim);font-size:15px}
.prose li{margin-bottom:6px}
.answer{border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px;background:var(--panel);padding:16px 18px;margin:18px 0 22px;font-size:15.5px}
.answer b{color:var(--accent)}

/* calculator shell */
.calc{display:grid;grid-template-columns:1.15fr .85fr;gap:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:34px 0 26px;box-shadow:var(--shadow)}
@media(max-width:880px){.calc{grid-template-columns:1fr}}
.calc-in{background:var(--panel);padding:26px 26px 22px}
.calc-out{background:var(--panel-2);border-left:1px solid var(--line);padding:26px;display:flex;flex-direction:column}
@media(max-width:880px){.calc-out{border-left:0;border-top:1px solid var(--line)}}
.sec-label{font-size:10.5px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--text-faint);margin-bottom:14px;display:flex;align-items:center;gap:10px}
.sec-label::after{content:"";height:1px;flex:1;background:var(--line)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
@media(max-width:560px){.grid3{grid-template-columns:1fr 1fr}}
.field{margin-bottom:14px}
label{display:block;font-size:12.5px;color:var(--text-dim);margin-bottom:6px;letter-spacing:.03em}
input[type=number],input[type=text],select{width:100%;font-family:inherit;font-size:15px;color:var(--text);background:var(--bg-2);border:1px solid var(--line);border-radius:8px;padding:10px 12px;outline:none;transition:border-color .15s,box-shadow .15s}
input:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
input.err{border-color:var(--warn)}
.checkrow{display:flex;gap:18px;flex-wrap:wrap;margin:4px 0 14px}
.check{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-dim);cursor:pointer;user-select:none}
.check input{accent-color:var(--accent);width:15px;height:15px;cursor:pointer}
.hint{font-size:11px;color:var(--text-faint);margin-top:4px}

/* result panel */
.r-size{display:flex;align-items:baseline;gap:10px;margin:6px 0 2px}
.r-size .num{font-size:58px;font-weight:800;letter-spacing:-.04em;color:var(--accent);line-height:1;text-shadow:0 0 34px var(--accent-soft)}
.r-size .unit{font-size:17px;font-weight:700;color:var(--text-dim)}
.r-snap{font-size:12.5px;color:var(--text-dim);margin-bottom:16px}
.r-snap b{color:var(--text)}
.r-table{width:100%;border-collapse:collapse;font-size:14px;margin-bottom:16px}
.r-table td{padding:8px 0;border-bottom:1px dashed var(--line)}
.r-table td:last-child{text-align:right;font-weight:700}
.r-table .lab{color:var(--text-dim);font-weight:400}
.bar{height:14px;border-radius:7px;overflow:hidden;display:flex;border:1px solid var(--line);margin:6px 0 8px}
.bar div{height:100%;transition:width .5s cubic-bezier(.2,.8,.2,1)}
.seg-base{background:var(--accent-deep)}.seg-env{background:var(--accent)}
.seg-ppl{background:#7ce7c0}.seg-win{background:#c9b6ff}
.legend{display:flex;flex-wrap:wrap;gap:12px;font-size:10.5px;color:var(--text-faint);margin-bottom:16px}
.legend span{display:flex;align-items:center;gap:5px}
.legend i{width:9px;height:9px;border-radius:2px;display:inline-block}
.notice{font-size:12px;border:1px solid var(--line);border-left:3px solid var(--warn);border-radius:6px;padding:10px 12px;color:var(--text-dim);background:var(--bg-2);margin-bottom:16px;display:none}
.notice.show{display:block}
.cost{border:1px solid var(--line);border-radius:10px;background:var(--bg-2);padding:14px 16px;margin-top:auto}
.cost .head{font-size:10.5px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--text-faint);margin-bottom:8px}
.cost .big{font-size:22px;font-weight:800;color:var(--ok)}
.cost .sml{font-size:11px;color:var(--text-faint)}
.btnrow{display:flex;gap:10px;margin-top:16px}
.btn{font-family:inherit;font-size:14px;font-weight:700;border-radius:8px;padding:11px 16px;cursor:pointer;border:1px solid var(--line);background:var(--panel);color:var(--text);flex:1;transition:transform .12s;text-align:center;text-decoration:none}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#04222e}
.btn.primary:hover{filter:brightness(1.08)}

/* tools grid + cards */
.tools{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:880px){.tools{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.tools{grid-template-columns:1fr}}
.tool{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:18px;text-decoration:none;color:var(--text);position:relative;overflow:hidden;transition:border-color .15s,transform .15s;display:block}
.tool:hover{border-color:var(--accent);transform:translateY(-2px)}
.tool .id{font-size:10px;color:var(--text-faint);letter-spacing:.15em}
.tool h3{font-size:15.5px;font-weight:700;margin:6px 0 6px}
.tool p{font-size:12px;color:var(--text-dim);line-height:1.55}
.tool .arrow{position:absolute;top:16px;right:16px;color:var(--accent);opacity:0;transition:opacity .15s}
.tool:hover .arrow{opacity:1}

/* tables */
.chartwrap{border:1px solid var(--line);border-radius:12px;overflow:auto;background:var(--panel);margin:18px 0}
table.qc{width:100%;border-collapse:collapse;font-size:12.5px;min-width:480px}
table.qc th{text-align:left;font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--text-faint);padding:12px 16px;border-bottom:1px solid var(--line);background:var(--panel-2);font-weight:700}
table.qc td{padding:10px 16px;border-bottom:1px solid var(--line-soft);color:var(--text-dim)}
table.qc td:first-child{color:var(--text);font-weight:500}
table.qc tr:last-child td{border-bottom:0}
table.qc td.t{color:var(--accent);font-weight:700}

/* faq */
details{border:1px solid var(--line);border-radius:10px;background:var(--panel);padding:0 18px;margin-bottom:10px}
summary{cursor:pointer;list-style:none;font-size:14.5px;font-weight:700;padding:15px 0;display:flex;justify-content:space-between;align-items:center;gap:14px}
summary::after{content:"+";color:var(--accent);font-size:18px;font-weight:400;transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{font-size:14px;color:var(--text-dim);padding:0 0 16px;max-width:760px}

/* converter widget */
.conv{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap;border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:20px;margin:22px 0;box-shadow:var(--shadow)}
.conv .field{margin:0;flex:1;min-width:150px}
.conv .eq{font-size:22px;color:var(--text-faint);padding-bottom:8px}
.conv output{font-size:22px;font-weight:800;color:var(--accent);display:block;padding:6px 0}

/* whole house rooms */
.roomrow{display:grid;grid-template-columns:1.3fr .65fr .65fr .65fr 1fr .85fr auto;gap:10px;align-items:end;border-bottom:1px dashed var(--line);padding:12px 0}
@media(max-width:760px){.roomrow{grid-template-columns:1fr 1fr;}}
.roomrow .del{border:1px solid var(--line);background:var(--panel);color:var(--warn);border-radius:8px;width:38px;height:38px;cursor:pointer}

/* footer */
footer{border-top:1px solid var(--line);padding:34px 0 44px;margin-top:30px;background:var(--panel-2)}
.frow{display:flex;flex-wrap:wrap;gap:30px;justify-content:space-between;font-size:12px;color:var(--text-faint)}
.frow a{color:var(--text-dim);text-decoration:none}
.frow a:hover{color:var(--accent)}
.fcols{display:flex;gap:46px;flex-wrap:wrap}
.fcols h4{font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-faint);margin-bottom:10px}
.fcols li{list-style:none;margin-bottom:6px}
.byline{margin-top:26px;font-size:11.5px;color:var(--text-faint)}
.adslot{border:1px dashed var(--line);border-radius:8px;color:var(--text-faint);font-size:10px;letter-spacing:.15em;text-transform:uppercase;display:grid;place-items:center;min-height:90px;margin:26px 0}

/* print report */
.printreport{display:none}
@media print{
  header,footer,nav,.market,.iconbtn,.btnrow,.adslot,.tools,#faq,#chart,body::before{display:none!important}
  body{background:#fff;color:#000}
  .calc{box-shadow:none;grid-template-columns:1fr;border-color:#999}
  .calc-out{border-top:1px solid #999}
  body.reportmode .calc,body.reportmode .hero,body.reportmode section,body.reportmode .crumbs{display:none!important}
  body.reportmode .printreport{display:block!important;color:#000}
  .printreport h2{font-size:20px;margin:0 0 4px}
  .printreport h3{font-size:14px;margin:16px 0 6px}
  .printreport .rmeta{font-size:10px;color:#555;margin:0 0 12px}
  .printreport .rbig{font-size:15px;font-weight:700}
  .printreport table{border-collapse:collapse;width:100%;font-size:11.5px;margin:6px 0}
  .printreport td{border:1px solid #999;padding:5px 8px}
  .printreport td:first-child{width:45%}
  .printreport p{font-size:11.5px;margin:6px 0}
  .printreport .rform{font-size:10.5px;background:#f2f2f2;padding:8px;border:1px solid #ccc}
  .printreport .rdisc{font-size:9.5px;color:#555;border-top:1px solid #999;padding-top:8px;margin-top:14px}
}