/* Shared styles for every page. Tool-specific styles live in each page's own <style>. */
:root{
  --paper:#F2F5F9;
  --card:#FFFFFF;
  --ink:#0F1A2E;
  --muted:#55627A;
  --line:#D8DFEA;
  --profit:#0C8F63;
  --loss:#C2352B;
  --btn:#0F1A2E;
  --focus:#2563EB;
  --radius:10px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:16px/1.6 "Instrument Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
h1,h2,h3{font-family:"Bricolage Grotesque","Instrument Sans",system-ui,Arial,sans-serif;line-height:1.15;margin:0}
a{color:inherit}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}

.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

header.site{background:var(--card);border-bottom:1px solid var(--line);position:relative;z-index:20}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{font-family:"Bricolage Grotesque",system-ui,sans-serif;font-weight:700;font-size:1.15rem;text-decoration:none}
header.site nav{display:flex;align-items:center;gap:18px}
header.site nav > a{font-size:.95rem;color:var(--muted);text-decoration:none}
header.site nav > a:hover{color:var(--ink);text-decoration:underline}

/* Calculators dropdown */
details.menu{position:relative}
details.menu summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:8px;font-size:.95rem;font-weight:600;padding:7px 10px;border-radius:6px}
details.menu summary::-webkit-details-marker{display:none}
details.menu summary:hover,details.menu[open] summary{background:#EEF2F7}
details.menu summary::after{content:"";width:6px;height:6px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px)}
details.menu[open] summary::after{transform:rotate(225deg) translateY(-1px)}
.menu-panel{position:absolute;right:0;top:calc(100% + 6px);z-index:30;width:min(320px,calc(100vw - 40px));background:var(--card);border:1px solid var(--line);border-radius:10px;padding:8px;box-shadow:0 8px 24px rgba(15,26,46,.12)}
.menu-panel a{display:block;padding:9px 12px;border-radius:6px;text-decoration:none;color:var(--ink)}
.menu-panel a:hover{background:var(--paper)}
.menu-panel{max-height:min(78vh,680px);overflow-y:auto}
.menu-all{font-weight:600}
.menu-group{display:block;padding:8px 12px 2px;font-size:.82rem;color:var(--muted)}
.menu-panel .menu-head{font-weight:600;margin-top:6px}
.menu-panel .menu-sub{padding-left:26px;font-size:.95rem}

/* ad slots: hidden until ads are switched on (site.config.json -> adsense) */
.ad{display:none;margin:20px auto;text-align:center}
html.ads-on .ad,html.ads-preview .ad{display:block}
.ad::before{content:"Advertisement";display:block;font-size:.72rem;color:var(--muted);margin-bottom:4px}
.ad .slot{margin:0 auto}
html.ads-preview .ad .slot{
  background:repeating-linear-gradient(135deg,#E9EDF4 0 10px,#EEF1F7 10px 20px);
  border:1px dashed var(--line);border-radius:6px;
  display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:.8rem;
}
.ad-top .slot{width:100%;max-width:728px;min-height:90px}
.ad-mid .slot{width:100%;max-width:336px;min-height:280px}
.ad-bottom .slot{width:100%;max-width:728px;min-height:90px}
.ad-side .slot{width:300px;min-height:250px}
.ad-side-tall .slot{width:300px;min-height:600px}

/* layout */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px;align-items:start}
aside.rail{position:sticky;top:16px}
aside.rail .ad{margin-top:0}
html:not(.ads-on):not(.ads-preview) .layout{grid-template-columns:minmax(0,1fr);max-width:820px;margin:0 auto}
html:not(.ads-on):not(.ads-preview) aside.rail{display:none}

.intro{padding:28px 0 4px}
.intro h1{font-size:clamp(1.9rem,4.4vw,2.8rem);font-weight:700;letter-spacing:-.02em}
.intro p{max-width:64ch;color:var(--muted);margin:10px 0 0}
.intro p a{color:var(--ink)}

/* calculator card */
.calc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-top:18px}
fieldset{border:0;margin:0;padding:0}
.fields{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.field label{display:block;font-size:.9rem;font-weight:600;margin-bottom:5px}
.field .hint{font-weight:400;color:var(--muted)}
.field input,.field select{
  width:100%;font:inherit;font-size:1.05rem;padding:11px 12px;border:1px solid #B9C3D4;border-radius:8px;background:#fff;color:var(--ink);
}
.actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
button{font:inherit;font-weight:600;border-radius:8px;padding:10px 16px;cursor:pointer}
.btn-primary{background:var(--btn);color:#fff;border:1px solid var(--btn)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid #B9C3D4}

.results{margin-top:20px;border-top:1px solid var(--line);padding-top:20px}
.message{min-height:1.5em;color:var(--loss);font-size:.93rem;margin:0 0 8px}
.split{height:44px;border-radius:8px;overflow:hidden;display:flex;background:#E6EAF2}
.split-note{font-size:.85rem;color:var(--muted);margin:8px 0 0}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:16px}
.big{border:1px solid var(--line);border-radius:8px;padding:14px 16px;background:#FAFBFD}
.big .k{font-size:.88rem;color:var(--muted)}
.big .v{font-family:"Bricolage Grotesque",system-ui,sans-serif;font-size:clamp(1.8rem,5vw,2.5rem);font-weight:700;line-height:1.1;margin-top:2px;font-variant-numeric:tabular-nums}

/* article content */
article{margin-top:34px}
article h2{font-size:1.6rem;margin:30px 0 10px;letter-spacing:-.01em}
article h3{font-size:1.15rem;margin:22px 0 6px}
article p,article li{max-width:68ch}
.formula{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin:10px 0;font-variant-numeric:tabular-nums}
.formula b{font-weight:600}
table{border-collapse:collapse;width:100%;max-width:520px;background:var(--card);border:1px solid var(--line);border-radius:8px;overflow:hidden}
th,td{text-align:left;padding:9px 14px;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
th{background:#EAEFF6;font-weight:600;font-size:.92rem}
tr:last-child td{border-bottom:0}
details{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin:8px 0;max-width:720px}
summary{cursor:pointer;font-weight:600}
details p{margin:8px 0 2px}

/* plain text pages (privacy, about, contact) */
.page{max-width:720px;padding:32px 0 8px}
.page h1{font-size:clamp(1.9rem,4.4vw,2.6rem);letter-spacing:-.02em}
.page h2{font-size:1.3rem;margin:26px 0 8px}
.page p,.page li{max-width:68ch}

footer.site{margin-top:48px;border-top:1px solid var(--line);background:var(--card);padding:32px 0;font-size:.93rem;color:var(--muted)}
footer.site .wrap{display:grid;grid-template-columns:1fr 2fr 1fr;gap:28px}
footer.site b{color:var(--ink);font-weight:600}
footer.site p{margin:6px 0 0;max-width:34ch}
.foot-col{display:flex;flex-direction:column;gap:6px}
.foot-col a{text-decoration:none}
.foot-col a:hover{color:var(--ink);text-decoration:underline}
.foot-col .foot-sub{padding-left:14px}
.foot-calcs{display:block;columns:2;column-gap:28px}
.foot-calcs b{display:block;column-span:all;margin-bottom:8px}
.foot-calcs a{display:block;break-inside:avoid;margin-bottom:6px}

@media (max-width:900px){
  .layout{grid-template-columns:minmax(0,1fr)}
  aside.rail{display:none}   /* hides the 2 sidebar ads, leaving 3 on mobile */
}
@media (max-width:560px){
  .fields,.pair{grid-template-columns:1fr}
  header.site .wrap{position:relative}
  details.menu{position:static}
  .menu-panel{left:20px;right:20px;width:auto;top:calc(100% - 2px)}
  footer.site .wrap{grid-template-columns:1fr}
  .foot-calcs{columns:1}
}
@media (prefers-reduced-motion:reduce){.split div{transition:none}}