/* SideGig Math — "invoice" look: plain sheets, right-aligned figures, double-ruled totals */
@font-face{font-family:"Public Sans";src:url(/fonts/public-sans.woff2) format("woff2");font-weight:100 900;font-display:swap}

:root{
  --paper:#eef1f4;      /* page background: cool desk grey */
  --sheet:#ffffff;      /* calculator / invoice sheet */
  --ink:#14213d;        /* navy ink: text, rules, header */
  --ink-soft:#4b5567;   /* secondary text */
  --rule:#cfd6df;       /* light lines */
  --mark:#ffe066;       /* highlighter on the answer */
  --link:#1f4fa8;
  --r:6px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.65 "Public Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--link);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--ink);outline-offset:2px;border-radius:2px}
.skip{position:absolute;left:-999px;top:8px;background:var(--sheet);padding:8px 12px;z-index:9}
.skip:focus{left:8px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.narrow{max-width:760px}

/* header */
.site-head{background:var(--ink);color:#fff}
.head-row{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;flex-wrap:wrap}
.mark{color:#fff;text-decoration:none;font-weight:750;font-size:19px;letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
.mark-sym{display:inline-grid;place-items:center;width:30px;height:30px;border:2px solid #fff;border-radius:5px;font-size:13px;font-weight:800;font-variant-numeric:tabular-nums}
.site-head nav a{color:#dfe5ef;text-decoration:none;margin-left:22px;font-size:15px}
.site-head nav a:hover{color:#fff;text-decoration:underline}

/* type */
h1{font-size:clamp(30px,4.2vw,44px);line-height:1.12;letter-spacing:-.025em;font-weight:780;margin:10px 0 12px;max-width:22ch}
h2{font-size:23px;line-height:1.25;letter-spacing:-.01em;font-weight:720;margin:44px 0 10px}
h3{font-size:18px;margin:24px 0 6px}
p,li{max-width:68ch}
.lead{font-size:19px;color:var(--ink-soft);margin:0 0 6px;max-width:58ch}
.lead-sub{color:var(--ink-soft);font-size:15px;margin:10px 0 0}
.stamp{font-size:14px;color:var(--ink-soft);margin:6px 0 22px}
.crumbs{font-size:14px;color:var(--ink-soft);padding-top:22px}
.crumbs a{color:var(--ink-soft)}
.hint{font-size:13px;color:var(--ink-soft);font-weight:400}

/* tool page layout: article + right column */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:64px;align-items:start}
.article{min-width:0;padding-bottom:40px}
.rail{padding-top:96px}
.rail-in{position:sticky;top:24px}
.rail h2{font-size:14px;font-weight:700;margin:0 0 8px;color:var(--ink-soft)}
.rail ul{list-style:none;margin:0 0 28px;padding:0;border-left:2px solid var(--rule)}
.rail li a{display:block;padding:5px 0 5px 14px;font-size:14px;line-height:1.4;color:var(--ink);text-decoration:none}
.rail li a:hover{color:var(--link);text-decoration:underline}
@media (max-width:960px){
  .layout{grid-template-columns:1fr;gap:0}
  .rail{padding-top:0}
  .rail-in{position:static}
  .rail nav{display:none}
}

/* calculator sheet */
.card{background:var(--sheet);border:1px solid var(--rule);border-radius:var(--r);padding:24px;margin:22px 0;box-shadow:0 1px 0 var(--rule)}
.card h2{margin-top:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px 18px}
label{display:block;font-size:14px;font-weight:650;margin-bottom:5px;line-height:1.35}
label .hint{display:block}
input,select{width:100%;padding:10px 12px;font:inherit;font-size:17px;font-variant-numeric:tabular-nums;color:var(--ink);background:#fbfcfd;border:1px solid #b8c2cf;border-radius:4px}
input:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 3px rgba(20,33,61,.15);background:#fff}
.affix{position:relative;display:block}
.affix::before,.affix::after{position:absolute;top:50%;transform:translateY(-50%);color:var(--ink-soft);font-size:16px;pointer-events:none}
.affix-pre::before{content:attr(data-unit);left:12px}
.affix-pre input{padding-left:26px}
.affix-post::after{content:attr(data-unit);right:12px}
.affix-post input{padding-right:30px}

/* the answer: an invoice total */
.result{margin-top:22px;border-top:2px solid var(--ink);padding-top:14px}
.result>div:first-child{font-size:14px;font-weight:650;color:var(--ink-soft)}
.big{display:inline-block;font-size:clamp(30px,4.6vw,42px);font-weight:800;letter-spacing:-.02em;line-height:1.15;margin:4px 0 14px;font-variant-numeric:tabular-nums;
  background:linear-gradient(transparent 58%,var(--mark) 58%,var(--mark) 92%,transparent 92%);border-bottom:4px double var(--ink);padding:0 2px}
.rows div{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:7px 0;border-bottom:1px dotted #aab4c2;font-size:15px}
.rows div:last-child{border-bottom:0}
.rows strong{font-variant-numeric:tabular-nums;white-space:nowrap}
.calc-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.calc-actions button{font:inherit;font-size:14px;font-weight:600;padding:8px 14px;border-radius:4px;border:1px solid var(--ink);background:var(--sheet);color:var(--ink);cursor:pointer}
.calc-actions button:first-child{background:var(--ink);color:#fff}
.calc-actions button:hover{filter:brightness(1.12)}

/* article content */
.article table{border-collapse:collapse;width:100%;max-width:420px;background:var(--sheet);font-variant-numeric:tabular-nums}
.article td,.article th{border-bottom:1px solid var(--rule);padding:8px 12px;text-align:left}
.article th{border-bottom:2px solid var(--ink)}
.article ul{padding-left:22px}
.article li{margin:6px 0}
details{border-bottom:1px solid var(--rule);padding:12px 0}
details:first-of-type{border-top:1px solid var(--rule)}
summary{font-weight:650;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-weight:400;font-size:22px;line-height:1;color:var(--ink-soft)}
details[open] summary::after{content:"−"}
details p{margin:8px 0 0;color:var(--ink-soft)}

/* home */
.hero{background:var(--sheet);border-bottom:1px solid var(--rule)}
.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center;padding-top:56px;padding-bottom:56px}
.hero h1{margin-top:0}
.quick{margin:0;background:var(--paper);box-shadow:none}
.quick h2{font-size:19px;margin-bottom:14px}
.quick .hint{margin:0}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr;gap:28px;padding-top:36px;padding-bottom:36px}}
.cat h2{margin-top:48px;padding-bottom:8px;border-bottom:2px solid var(--ink)}
.tool-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));column-gap:40px}
.tool-list li{max-width:none;margin:0;border-bottom:1px solid var(--rule)}
.tool-list a{display:block;padding:14px 0;text-decoration:none;color:var(--ink)}
.tool-list strong{display:block;font-size:17px}
.tool-list span{display:block;font-size:15px;color:var(--ink-soft);line-height:1.45;margin-top:2px}
.tool-list a:hover strong{color:var(--link);text-decoration:underline}

/* ads (only rendered once AdSense is configured) */
.ad{margin:28px 0;min-height:280px}
.ad-sidebar{min-height:600px}
.ad-label{font-size:12px;color:var(--ink-soft);margin:0 0 4px}
@media (max-width:960px){.ad-sidebar{display:none}}

/* footer */
.site-foot{background:var(--ink);color:#c9d2e0;margin-top:64px;padding:44px 0 28px;font-size:15px}
.foot-dir{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:28px}
.site-foot h2{color:#fff;font-size:15px;margin:0 0 10px}
.site-foot ul{list-style:none;margin:0;padding:0}
.site-foot li{margin:6px 0}
.site-foot a{color:#c9d2e0;text-decoration:none}
.site-foot a:hover{color:#fff;text-decoration:underline}
.fine{font-size:13px;margin:36px 0 0;color:#9aa6b8}

@media (max-width:560px){
  body{font-size:16px}
  .site-head nav a{margin-left:0;margin-right:18px}
  .card{padding:18px}
}
@media print{.site-head,.site-foot,.rail,.ad,.calc-actions{display:none}body{background:#fff}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
html{scroll-behavior:smooth}