:root{
  --blue:#2563eb; --teal:#0d9488; --ink:#1a1a2e; --muted:#6b7280; --border:#e5e7eb;
  --bg:#f7f9fc; --card:#ffffff; --soft:#eef4ff;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
header.site{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
header.site .wrap{max-width:920px;margin:0 auto;padding:12px 16px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;color:var(--ink)}
.brand-name{font-size:1.1rem;letter-spacing:.2px}
.logo{border-radius:7px;flex:0 0 auto}
nav.site a{margin-left:14px;color:var(--muted);font-size:.92rem}
nav.site a:hover{color:var(--blue);text-decoration:none}
main{max-width:920px;margin:0 auto;padding:24px 16px 8px}
h1{font-size:1.85rem;margin:.2em 0 .1em;line-height:1.25}
.sub{color:var(--muted);margin:.2em 0 1em;font-size:1.02rem}
.local-badge{display:inline-block;background:var(--soft);color:var(--blue);font-size:.8rem;padding:4px 10px;border-radius:999px;margin-bottom:14px}
.tool-panel{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:0 1px 3px rgba(16,24,40,.05)}
form.calc{display:grid;grid-template-columns:1fr 1fr;gap:14px 18px}
.fld{display:flex;flex-direction:column;gap:5px}
.fld.hidden,.result.hidden{display:none}
label{font-size:.85rem;color:var(--muted);font-weight:600}
label.chk{font-weight:500;color:var(--ink);flex-direction:row;display:flex;align-items:center;gap:8px}
input[type=date],input[type=number]{padding:10px 11px;border:1px solid var(--border);border-radius:9px;font-size:1rem;width:100%;background:#fff;color:var(--ink)}
input:focus{outline:2px solid var(--blue);outline-offset:1px}
.result{margin-top:16px;border-top:1px dashed var(--border);padding-top:16px}
.big{font-size:2rem;font-weight:800;color:var(--blue)}
.note{color:var(--muted);font-size:.95rem;margin-top:4px}
.disclaimer{margin-top:16px;font-size:.8rem;color:var(--muted);border-top:1px solid var(--border);padding-top:12px}
section{margin:26px 0}
h2{font-size:1.3rem;margin:.2em 0 .5em}
h3{font-size:1.02rem;margin:1em 0 .2em}
.faq h3{margin-top:1.1em}
.ad-slot{margin:18px 0;min-height:10px}
.ad-slot:empty{display:none}
.grid-links{display:flex;flex-wrap:wrap;gap:10px}
.grid-links a{background:var(--soft);border:1px solid #dbe7ff;color:var(--blue);padding:8px 13px;border-radius:999px;font-size:.9rem}
.grid-links a:hover{background:#dbe7ff;text-decoration:none}
footer.site{border-top:1px solid var(--border);margin-top:32px;background:var(--card)}
footer.site .wrap{max-width:920px;margin:0 auto;padding:18px 16px;display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;font-size:.85rem;color:var(--muted)}
footer.site a{margin-left:12px;color:var(--muted)}
footer.site a:hover{color:var(--blue)}
@media(max-width:640px){
  form.calc{grid-template-columns:1fr}
  h1{font-size:1.5rem}
  .big{font-size:1.6rem}
  header.site .wrap,main,footer.site .wrap{padding-left:12px;padding-right:12px}
}