:root{
  --bg:#f6faf7; --surface:#ffffff; --ink:#1c2420; --muted:#5a6660;
  --primary:#0e9f6e; --primary-dark:#047857; --line:#dcebe2;
  --soft:#e9f7f0; --radius:16px;
  --shadow:0 10px 30px rgba(4,120,87,.10);
}
*{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(--ink);line-height:1.6}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
a{color:var(--primary-dark)}
.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 20px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.3rem}
.logo svg{width:34px;height:34px}
.logo em{font-style:normal;color:var(--primary)}
.main-nav{display:flex;gap:22px}
.main-nav a{color:var(--ink);text-decoration:none;font-weight:600;font-size:.98rem}
.main-nav a:hover{color:var(--primary)}
.nav-toggle{display:none;background:none;border:0;font-size:1.5rem;cursor:pointer;color:var(--ink)}
.hero{background:linear-gradient(160deg,#fff 0%,var(--soft) 100%);border-bottom:1px solid var(--line);padding:52px 0 40px;text-align:center}
.hero h1{font-size:2.3rem;line-height:1.15;margin:0 0 12px}
.hero h1 .grad{color:var(--primary)}
.hero p.lede{color:var(--muted);font-size:1.1rem;max-width:640px;margin:0 auto 26px}
.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;max-width:760px;margin:0 auto;text-align:left}
.tabs{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap}
.tab{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 18px;font-weight:700;cursor:pointer;font-size:.95rem;color:var(--ink)}
.tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.field{margin-bottom:14px}
.field label{display:block;font-weight:700;font-size:.92rem;margin-bottom:5px}
.field .hint{font-weight:400;color:var(--muted);font-size:.85rem}
.field input{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:1.05rem;letter-spacing:.12em;text-transform:lowercase;background:#fff}
.field input:focus{outline:2px solid var(--primary);border-color:transparent}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.btn{display:inline-block;background:var(--primary);color:#fff;border:0;border-radius:12px;padding:12px 24px;font-size:1rem;font-weight:700;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--primary-dark)}
.btn.secondary{background:#fff;color:var(--primary-dark);border:1px solid var(--primary)}
.btn.small{padding:8px 16px;font-size:.9rem;border-radius:9px}
.tool-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px}
.status{margin-top:14px;font-size:.95rem;min-height:1.2em}
.status.error{color:#b3261e;background:#fdecea;border:1px solid #f5c6c2;border-radius:10px;padding:10px 14px}
.status.working{color:var(--muted)}
.total-note{font-weight:700;margin:18px 0 6px}
.group-h{margin:16px 0 6px;font-size:1.05rem;color:var(--primary-dark)}
.group-h span{color:var(--muted);font-weight:600;font-size:.9rem}
.word-cols{list-style:none;margin:0 0 6px;padding:0;columns:4;column-gap:22px}
.word-cols li{padding:3px 0;border-bottom:1px solid #eef4f0;break-inside:avoid;font-size:.98rem}
.privacy-note{margin-top:16px;font-size:.88rem;color:var(--muted);text-align:center}
section.block{padding:44px 0}
section.block h2{font-size:1.6rem;margin:0 0 10px}
section.block .sub{color:var(--muted);max-width:720px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.card h3{margin:0 0 6px;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.95rem}
.step-num{display:inline-flex;width:30px;height:30px;border-radius:50%;background:var(--primary);color:#fff;align-items:center;justify-content:center;font-weight:800;margin-bottom:8px}
details.faq{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-top:10px}
details.faq summary{font-weight:700;cursor:pointer}
details.faq p{color:var(--muted);margin:8px 0 2px}
article.page{padding:40px 0 56px;max-width:820px}
article.page h1{font-size:2rem;line-height:1.25}
article.page h2{margin-top:30px;font-size:1.3rem}
article.page p,article.page li{color:#333d37}
article.page ol,article.page ul{padding-left:22px}
.site-footer{background:#14201a;color:#c4d2c9;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px;padding:38px 20px 10px}
.footer-grid a{color:#c4d2c9;text-decoration:none;display:block;padding:3px 0;font-size:.94rem}
.footer-grid a:hover{color:#fff}
.footer-brand{color:#fff;font-weight:800;font-size:1.15rem;margin:0 0 6px}
.footer-h{color:#fff;font-weight:700;margin:0 0 8px}
.footer-bottom{border-top:1px solid #26362d;padding:14px 20px 22px;font-size:.85rem;color:#93a69a}
@media (max-width:820px){
  .grid,.footer-grid{grid-template-columns:1fr}
  .word-cols{columns:2}
  .field-row{grid-template-columns:1fr}
  .hero h1{font-size:1.8rem}
  .main-nav{display:none;position:absolute;top:60px;right:16px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);flex-direction:column;padding:14px 18px;gap:12px}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
}