/* Reading Hub — shared styles. Light + dark via [data-theme]. Mobile-first. */
:root{
  --bg:#ffffff; --surface:#f6f7f9; --surface-2:#eef1f5; --border:#e2e6ec;
  --text:#1a1f26; --muted:#5b6472; --brand:#2f6df6; --brand-ink:#1b52d6;
  --accent:#0ea5a4; --good:#16a34a; --warn:#d97706; --danger:#dc2626;
  --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.06),0 4px 16px rgba(16,24,40,.06);
  --maxw:960px; --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
}
[data-theme="dark"]{
  --bg:#0f141b; --surface:#161d27; --surface-2:#1e2733; --border:#28323f;
  --text:#e7ecf3; --muted:#9aa7b8; --brand:#5b8cff; --brand-ink:#8fb0ff;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 6px 20px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);
  line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}
a{color:var(--brand-ink);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
main{padding:28px 0 56px}
h1{font-size:2rem;line-height:1.2;margin:.2em 0 .3em}
h2{font-size:1.4rem;margin:1.6em 0 .4em}
h3{font-size:1.12rem;margin:1.3em 0 .3em}
p{margin:.6em 0}
small,.muted{color:var(--muted)}
.lead{font-size:1.12rem;color:var(--muted);margin-bottom:1.2em}

/* Header / nav (injected by site.js) */
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:10px 0}
.brand{font-weight:800;font-size:1.05rem;margin-right:auto;display:flex;align-items:center;gap:8px}
.brand .dot{width:12px;height:12px;border-radius:4px;background:linear-gradient(135deg,var(--brand),var(--accent))}
.nav a.navlink{padding:7px 11px;border-radius:9px;color:var(--text);font-size:.94rem;font-weight:600}
.nav a.navlink:hover{background:var(--surface-2);text-decoration:none}
.nav a.navlink.active{background:var(--brand);color:#fff}
.theme-btn{margin-left:6px;border:1px solid var(--border);background:var(--surface);
  color:var(--text);border-radius:9px;padding:7px 10px;cursor:pointer;font-size:.95rem}

/* Cards / panels */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:20px}
.tool{margin:18px 0}
textarea.rh-input{width:100%;min-height:180px;resize:vertical;padding:14px;border-radius:12px;
  border:1px solid var(--border);background:var(--bg);color:var(--text);font-family:var(--sans);
  font-size:1rem;line-height:1.55}
textarea.rh-input:focus{outline:2px solid var(--brand);border-color:var(--brand)}
.controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:14px 0}
label.ctl{display:flex;flex-direction:column;gap:4px;font-size:.82rem;color:var(--muted);font-weight:600}
select,input[type=number]{padding:8px 10px;border-radius:9px;border:1px solid var(--border);
  background:var(--bg);color:var(--text);font-size:.95rem}
.chipset{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:5px 10px;border-radius:999px;border:1px solid var(--border);background:var(--surface-2);
  font-size:.82rem;color:var(--muted)}
.chip.on{background:var(--good);color:#fff;border-color:transparent}
.chip.over{background:var(--danger);color:#fff;border-color:transparent}

/* Result readout */
.result{display:flex;flex-wrap:wrap;gap:22px;align-items:baseline;margin:8px 0 4px}
.result .big{font-size:2.6rem;font-weight:800;line-height:1;font-variant-numeric:tabular-nums}
.result .sub{color:var(--muted);font-size:.95rem}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-top:8px}
.stat{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:12px 14px}
.stat b{display:block;font-size:1.5rem;font-variant-numeric:tabular-nums}
.stat span{color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.03em}
.btn{border:1px solid var(--border);background:var(--surface-2);color:var(--text);border-radius:9px;
  padding:8px 12px;cursor:pointer;font-weight:600;font-size:.92rem}
.btn.primary{background:var(--brand);color:#fff;border-color:transparent}
.btn:hover{filter:brightness(1.03)}
.copied{color:var(--good);font-weight:600;font-size:.9rem}

/* Related tools + affiliate + FAQ */
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:14px}
.related a{display:block;padding:14px;border:1px solid var(--border);border-radius:12px;background:var(--surface);
  color:var(--text);font-weight:600}
.related a:hover{border-color:var(--brand);text-decoration:none}
.related a span{display:block;font-weight:400;color:var(--muted);font-size:.85rem;margin-top:3px}
.aff{border:1px dashed var(--border);border-radius:12px;background:var(--surface-2);padding:14px;margin:16px 0}
.aff small{display:block;margin-top:6px}
.faq details{border:1px solid var(--border);border-radius:10px;padding:10px 14px;margin:8px 0;background:var(--surface)}
.faq summary{cursor:pointer;font-weight:600}
.privacy-note{font-size:.85rem;color:var(--muted);margin-top:8px}

/* Home hero + grid */
.hero{text-align:center;padding:26px 0 8px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;margin:18px 0}
.grid .card h3{margin-top:0}
.grid .card a.cta{display:inline-block;margin-top:8px;font-weight:700}

/* Tables + article */
.article{max-width:760px}
.article table,table.data{border-collapse:collapse;width:100%;margin:14px 0;font-size:.94rem}
.article th,.article td,table.data th,table.data td{border:1px solid var(--border);padding:8px 10px;text-align:left}
.article th,table.data th{background:var(--surface-2)}
.byline{color:var(--muted);font-size:.9rem;margin-bottom:1.2em}

/* Footer */
.site-footer{border-top:1px solid var(--border);background:var(--surface);margin-top:30px}
.site-footer .wrap{padding:24px 20px;display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;
  color:var(--muted);font-size:.9rem}
.site-footer a{color:var(--muted)}
.site-footer .cols{display:flex;gap:26px;flex-wrap:wrap}
.disclosure{max-width:520px;font-size:.82rem}

/* Ad slots — reserve height so ads cause zero layout shift (CLS-safe). */
.ad-slot{
  margin:26px 0;padding:8px;border:1px solid var(--border);border-radius:12px;
  background:var(--surface);text-align:center;
  min-height:280px;                 /* reserves space for a 250px unit + label */
  display:flex;flex-direction:column;gap:6px;align-items:center;justify-content:center;
  overflow:hidden;max-width:100%;
}
.ad-slot .ad-label{font-size:.66rem;text-transform:uppercase;letter-spacing:.09em;color:var(--muted);align-self:center}
.ad-slot .ad-inner{width:100%;display:flex;align-items:center;justify-content:center}
.ad-slot .adsbygoogle{width:100%}
.ad-slot.ad-demo .ad-inner{
  min-height:250px;padding:16px;color:var(--muted);font-size:.9rem;max-width:520px;margin:0 auto;
  border:1px dashed var(--border);border-radius:10px;
  background:repeating-linear-gradient(45deg,transparent,transparent 10px,color-mix(in srgb,var(--muted) 8%,transparent) 10px,color-mix(in srgb,var(--muted) 8%,transparent) 20px);
}

@media (max-width:520px){
  body{font-size:16px}
  h1{font-size:1.6rem}
  .result .big{font-size:2rem}
  .ad-slot{min-height:260px}
}