:root{
  --bg:#ffffff; --fg:#1a1d24; --muted:#5b6472; --line:#e6e9ef;
  --card:#f7f9fc; --brand:#2563eb; --brand-fg:#ffffff; --accent:#0ea5a3;
  --ok:#15803d; --warn:#b45309; --danger:#b91c1c; --radius:14px;
  --maxw:820px; --shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.05);
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0f1420; --fg:#e7ebf3; --muted:#9aa4b5; --line:#232a38;
    --card:#161c2b; --brand:#4f83ff; --shadow:0 1px 2px rgba(0,0,0,.4); }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--fg);line-height:1.6;font-size:17px;-webkit-text-size-adjust:100%}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);position:sticky;top:0;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);z-index:20}
header.site .container{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:800;font-size:1.25rem;color:var(--fg);letter-spacing:-.02em}
.logo span{color:var(--brand)}
nav.top a{color:var(--muted);font-size:.95rem;margin-left:18px;font-weight:600}
main{padding:28px 0 8px}
h1{font-size:1.9rem;line-height:1.2;letter-spacing:-.02em;margin:.2em 0 .5em}
h2{font-size:1.35rem;margin:1.8em 0 .5em;letter-spacing:-.01em}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:6px}
.crumbs a{color:var(--muted)}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);margin:18px 0}
.field{margin:12px 0}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
.field input,.field select{width:100%;padding:12px 14px;font-size:1.05rem;border:1px solid var(--line);
  border-radius:10px;background:var(--bg);color:var(--fg)}
.field input:focus,.field select:focus{outline:2px solid var(--brand);border-color:var(--brand)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:520px){.row{grid-template-columns:1fr}}
.seg{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0 4px}
.seg button{flex:1;min-width:120px;padding:10px;border:1px solid var(--line);background:var(--bg);
  color:var(--fg);border-radius:10px;font-weight:600;cursor:pointer}
.seg button[aria-pressed=true]{background:var(--brand);color:var(--brand-fg);border-color:var(--brand)}
.result{margin-top:16px;padding:16px 18px;border-radius:12px;background:color-mix(in srgb,var(--brand) 10%,var(--bg));
  border:1px solid color-mix(in srgb,var(--brand) 30%,var(--line));font-size:1.1rem}
.result strong{font-size:1.5rem;display:block;margin-top:2px}
.result .sub{color:var(--muted);font-size:.95rem;margin-top:6px}
.hint{color:var(--muted);font-size:.9rem;margin-top:8px}
.intro{color:var(--fg)}
.faq details{border-bottom:1px solid var(--line);padding:14px 0}
.faq summary{font-weight:700;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+ ";color:var(--brand);font-weight:800}
.faq details[open] summary::before{content:"– "}
.faq p{color:var(--muted);margin:.6em 0 0}
.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin:14px 0}
.related a{display:block;padding:14px;border:1px solid var(--line);border-radius:12px;background:var(--card);
  color:var(--fg);font-weight:600}
.related a:hover{border-color:var(--brand);text-decoration:none}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin:20px 0}
.cat-card{padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}
.cat-card h3{margin:.2em 0}
.cat-card .icon{font-size:1.6rem}
.ad-slot{margin:22px 0;min-height:90px;display:flex;align-items:center;justify-content:center;
  border:1px dashed var(--line);border-radius:12px;color:var(--muted);font-size:.8rem;background:var(--card)}
.hero{padding:24px 0 8px}
.hero p{color:var(--muted);font-size:1.1rem;max-width:640px}
footer.site{border-top:1px solid var(--line);margin-top:40px;padding:26px 0;color:var(--muted);font-size:.9rem}
footer.site a{color:var(--muted)}
footer.site .frow{display:flex;gap:18px;flex-wrap:wrap}
.consent{position:fixed;left:0;right:0;bottom:0;background:var(--card);border-top:1px solid var(--line);
  padding:16px 20px;z-index:50;display:none}
.consent.show{display:block}
.consent .container{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.consent button{padding:10px 18px;border-radius:10px;border:1px solid var(--brand);background:var(--brand);
  color:var(--brand-fg);font-weight:700;cursor:pointer}
.consent button.ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.affiliate{margin:24px 0;padding:20px;border:1px solid color-mix(in srgb,var(--accent) 40%,var(--line));
  border-radius:var(--radius);background:color-mix(in srgb,var(--accent) 7%,var(--bg));position:relative}
.affiliate .tag{position:absolute;top:10px;right:14px;font-size:.72rem;color:var(--muted);
  text-transform:uppercase;letter-spacing:.06em}
.affiliate h2{margin:.1em 0 .4em;font-size:1.15rem}
.affiliate p{margin:.3em 0 .9em;color:var(--muted)}
.affiliate .btn{display:inline-block;padding:11px 18px;background:var(--accent);color:#fff;
  border-radius:10px;font-weight:700}
.affiliate .btn:hover{text-decoration:none;filter:brightness(1.08)}