:root{--ink:#0f172a;--muted:#475569;--line:#e2e8f0;--bg:#f8fafc;--card:#fff;--brand:#0d9488;--brand-d:#0f766e;--accent:#f59e0b;--danger:#dc2626;--radius:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
a{color:var(--brand-d)}img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}.narrow{max-width:760px}
header.site{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:62px;gap:12px}
.logo{font-weight:800;font-size:1.25rem;text-decoration:none;color:var(--ink);letter-spacing:-.02em;display:flex;align-items:center;gap:8px}
.logo span.dot{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--brand),#22c55e);display:inline-grid;place-items:center;color:#fff;font-size:.9rem}
nav a{margin-left:18px;text-decoration:none;color:var(--muted);font-weight:500;font-size:.95rem}nav a:hover{color:var(--ink)}
nav a.cta{background:var(--ink);color:#fff;padding:8px 14px;border-radius:999px}
@media(max-width:720px){nav a:not(.cta){display:none}}
.hero{padding:48px 0 24px;text-align:center}
.hero h1{font-size:clamp(2rem,5vw,3.1rem);line-height:1.1;letter-spacing:-.03em;margin:0 0 14px}
.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:640px;margin:0 auto}
.badge{display:inline-block;background:#ccfbf1;color:var(--brand-d);font-weight:700;font-size:.8rem;padding:4px 10px;border-radius:999px;margin-bottom:14px;letter-spacing:.03em;text-transform:uppercase}
.tool{display:grid;grid-template-columns:1fr 1.15fr;gap:22px;margin:28px 0 40px}
@media(max-width:860px){.tool{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 1px 2px rgba(0,0,0,.03),0 8px 24px rgba(15,23,42,.05)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
label{display:block;font-size:.85rem;font-weight:600;margin:0 0 4px;color:#334155}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:10px;font:inherit;font-size:.95rem;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid #99f6e4;border-color:var(--brand)}
.field{margin-bottom:12px}
.seg{display:flex;gap:6px;flex-wrap:wrap}.seg input{display:none}
.seg label{flex:1;text-align:center;border:1px solid #cbd5e1;border-radius:10px;padding:9px 6px;cursor:pointer;font-weight:600;margin:0;font-size:.88rem;background:#fff;min-width:80px}
.seg input:checked+label{background:var(--ink);color:#fff;border-color:var(--ink)}
.out-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;gap:8px;flex-wrap:wrap}
.out-head h2{font-size:1.05rem;margin:0}
#subjectRow{font-size:.92rem;background:#f1f5f9;border-radius:10px;padding:8px 12px;margin-bottom:8px}
#output{white-space:pre-wrap;min-height:300px;font-size:.96rem;line-height:1.55;background:#fff;border:1px dashed #cbd5e1;border-radius:10px;padding:14px}
.btn{display:inline-block;border:0;cursor:pointer;background:var(--brand);color:#fff;font-weight:700;padding:11px 18px;border-radius:10px;text-decoration:none;font-size:.95rem}
.btn:hover{background:var(--brand-d)}.btn.dark{background:var(--ink)}.btn.big{font-size:1.1rem;padding:15px 26px;border-radius:12px}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid #cbd5e1}
.meta{font-size:.82rem;color:var(--muted)}
.upsell{background:linear-gradient(135deg,#0f172a,#134e4a);color:#e2e8f0;border-radius:var(--radius);padding:28px;display:flex;gap:24px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:20px 0 48px}
.upsell h3{color:#fff;margin:0 0 6px;font-size:1.35rem}.upsell p{margin:0;max-width:560px}
.upsell .btn{background:var(--accent);color:#111}
section{padding:22px 0}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}@media(max-width:760px){.features{grid-template-columns:1fr}}
.features .card h3{margin:0 0 6px;font-size:1.05rem}.features .card p{margin:0;color:var(--muted);font-size:.95rem}
.articles{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.articles a{display:block;text-decoration:none;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;font-weight:600}
.articles a small{display:block;color:var(--muted);font-weight:400;margin-top:4px}
.articles a:hover{border-color:var(--brand)}
article.post{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;margin:28px auto}
@media(max-width:600px){article.post{padding:20px}}
article.post h1{font-size:clamp(1.8rem,4vw,2.4rem);line-height:1.15;letter-spacing:-.02em;margin-top:0}
article.post h2{margin-top:1.8em;font-size:1.4rem;letter-spacing:-.01em}article.post h3{margin-top:1.4em}
.tpl{background:#f8fafc;border-left:4px solid var(--brand);border-radius:8px;padding:14px 16px;white-space:pre-wrap;font-size:.95rem;margin:12px 0}
.callout{background:#fffbeb;border:1px solid #fde68a;border-radius:12px;padding:14px 16px;margin:18px 0}
.callout.tool-cta{background:#f0fdfa;border-color:#99f6e4}
table{border-collapse:collapse;width:100%;font-size:.93rem;margin:12px 0}th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}th{background:#f1f5f9}
.toc{background:#f8fafc;border-radius:12px;padding:12px 18px;font-size:.95rem}
.price-card{max-width:440px;margin:0 auto;text-align:center}
.price{font-size:3.2rem;font-weight:800;letter-spacing:-.03em}.price s{font-size:1.4rem;color:#94a3b8;font-weight:500}
.check{list-style:none;padding:0;text-align:left}.check li{padding:6px 0 6px 30px;position:relative}
.check li:before{content:"✓";position:absolute;left:0;top:6px;color:#fff;background:var(--brand);width:20px;height:20px;border-radius:50%;font-size:.75rem;display:grid;place-items:center;font-weight:800}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin-bottom:10px}.faq summary{font-weight:700;cursor:pointer}
.newsletter{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center;margin:30px 0}
.newsletter form{display:flex;gap:8px;max-width:460px;margin:12px auto 0}.newsletter input{flex:1}
@media(max-width:500px){.newsletter form{flex-direction:column}}
footer.site{border-top:1px solid var(--line);background:#fff;padding:26px 0;margin-top:40px;font-size:.88rem;color:var(--muted)}
footer.site a{color:var(--muted);margin-right:14px}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;transition:.25s;opacity:0;font-weight:600;z-index:50}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}
.crumb{font-size:.85rem;color:var(--muted);margin-top:18px}