:root{
  --fg:#1b1f24; --muted:#5b6470; --bg:#ffffff; --card:#f7f9fc; --line:#e3e8ef;
  --accent:#2563eb; --accent-fg:#fff; --good:#0a7c3a; --shadow:0 1px 3px rgba(20,30,50,.08);
}
@media (prefers-color-scheme:dark){
  :root{--fg:#e6edf3;--muted:#9aa4b2;--bg:#0d1117;--card:#161b22;--line:#283040;--accent:#4493f8;}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--fg);background:var(--bg);
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:760px;margin:0 auto;padding:24px}
.muted{color:var(--muted);font-size:.9em}

/* header / footer */
header.site{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--line);z-index:10}
header .bar{max-width:760px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.brand{font-weight:800;font-size:1.1rem;color:var(--fg)}
header nav a{margin-left:14px;color:var(--muted);font-size:.92rem}
footer.site{border-top:1px solid var(--line);margin-top:48px;padding:8px 0;color:var(--muted);font-size:.9rem}

/* headings */
h1{font-size:1.7rem;line-height:1.25;margin:.2em 0 .4em}
h2{font-size:1.25rem;margin:1.6em 0 .5em}
.intro{color:var(--muted);font-size:1.05rem}
.crumb{font-size:.85rem;color:var(--muted);margin:4px 0 8px}
.crumb a{color:var(--muted)}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}
.tool.card{padding:20px;margin:14px 0}

/* tool form */
.inputs{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:520px){.inputs{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:600;font-size:.9rem}
.field .suffix{color:var(--muted);font-weight:400}
.field input,.field select{padding:10px 12px;border:1px solid var(--line);border-radius:10px;
  background:var(--bg);color:var(--fg);font-size:1rem;width:100%}
.field input:focus,.field select:focus{outline:2px solid var(--accent);border-color:var(--accent)}
.result{margin-top:18px;padding:16px;border-radius:10px;background:var(--bg);border:1px dashed var(--line);
  font-size:1.05rem;line-height:1.7}
.result b{color:var(--good);font-size:1.15em}

/* index grid */
.hero{padding:18px 0 6px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:10px 0 8px}
@media (max-width:520px){.grid{grid-template-columns:1fr}}
.tool-card{padding:16px;display:flex;flex-direction:column;gap:6px;color:var(--fg)}
.tool-card:hover{text-decoration:none;border-color:var(--accent)}
.tool-card b{font-size:1.02rem}

/* monetization blocks */
.btn{display:inline-block;background:var(--accent);color:var(--accent-fg);padding:10px 16px;border-radius:10px;font-weight:600}
.btn:hover{text-decoration:none;opacity:.92}
.affiliate,.premium{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:16px 0;
  padding:14px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
.ad-slot{min-height:90px;display:flex;align-items:center;justify-content:center;margin:18px 0;
  border:1px dashed var(--line);border-radius:10px;color:var(--muted);font-size:.75rem;
  letter-spacing:.12em;text-transform:uppercase;background:repeating-linear-gradient(
    45deg,transparent,transparent 10px,rgba(120,130,150,.05) 10px,rgba(120,130,150,.05) 20px)}

/* faq */
.faq details{border-bottom:1px solid var(--line);padding:12px 0}
.faq summary{cursor:pointer;font-weight:600}
.faq p{color:var(--muted);margin:.6em 0 0}
.related ul{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:8px}
@media (max-width:520px){.related ul{grid-template-columns:1fr}}

/* prose / methodology / trust pages */
.prose{max-width:720px}
.prose h2{font-size:1.2rem}
.prose p{margin:.8em 0}
.byline{color:var(--muted);font-size:.85rem;margin:.2em 0 .6em}
.sources ul{margin:.4em 0;padding-left:1.2em}
.sources a{font-size:.92rem}

/* invoice generator */
.lineitems{width:100%;border-collapse:collapse;margin:12px 0}
.lineitems th,.lineitems td{border-bottom:1px solid var(--line);padding:6px 8px;text-align:left;font-size:.92rem}
.lineitems input{width:100%;border:1px solid var(--line);border-radius:8px;padding:6px 8px;background:var(--bg);color:var(--fg)}
.lineitems .amt{white-space:nowrap}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}

/* Pro */
.pro-only{display:none}
body.pro .pro-only{display:block}
body.pro .ad-slot,body.pro .adsbygoogle{display:none!important}

/* homepage search */
#toolsearch{width:100%;max-width:440px;margin:14px 0 0;padding:10px 14px;border:1px solid var(--line);
  border-radius:10px;background:var(--card);color:var(--fg);font-size:1rem}
#toolsearch:focus{outline:2px solid var(--accent);border-color:var(--accent)}
.cat{margin:0 0 8px}

/* embed box */
.embed-box{margin:20px 0}
.embed-box pre{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px;overflow:auto;margin:.5em 0}
.embed-box code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.82rem;white-space:pre-wrap;word-break:break-all}