:root{--bg:#f4f6f8;--card:#fff;--fg:#1a1d21;--muted:#6b7480;--line:#e3e7ec;--accent:#0b5cff;--accent2:#eaf1ff;--ok:#0b7d3e;--warn:#fffbe6;--warnline:#f0e0a8}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--fg);background:var(--bg)}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%}
/* header */
.site-head{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.site-head .inner{max-width:1100px;margin:0 auto;padding:12px 18px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.brand{font-weight:800;font-size:20px;color:var(--fg)}
.brand span{color:var(--accent)}
.site-head nav{display:flex;gap:18px;flex-wrap:wrap;font-size:14px}
main{max-width:820px;margin:0 auto;padding:22px 18px 70px}
main.wide{max-width:1100px}
/* breadcrumbs */
.crumbs{font-size:13px;color:var(--muted);margin:0 0 14px}
.crumbs a{color:var(--muted)}
/* typography */
h1{font-size:30px;line-height:1.2;margin:.1em 0 .45em}
h2{font-size:22px;margin:1.7em 0 .4em}
h3{font-size:17px;margin:1.3em 0 .3em}
.lede{font-size:18px;color:var(--muted);margin:0 0 8px}
.note{color:var(--muted);font-size:14px}
/* answer / callout */
.answer{background:var(--accent2);border:1px solid var(--accent);border-radius:12px;padding:16px 18px;font-size:17px;margin:6px 0 12px}
.answer strong{color:var(--accent)}
/* tables */
table.data{width:100%;border-collapse:collapse;margin:14px 0;font-size:14px;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
table.data th{background:#f0f3f7;text-align:left;padding:10px;font-size:12px;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
table.data td{padding:10px;border-top:1px solid var(--line)}
table.data td.num,table.data th.num{text-align:right}
/* cta */
.cta{display:block;background:var(--accent);color:#fff;text-decoration:none;text-align:center;padding:15px;border-radius:11px;font-weight:700;margin:24px 0}
.cta:hover{text-decoration:none;opacity:.94}
.cta small{display:block;font-weight:400;opacity:.85;font-size:13px;margin-top:2px}
/* faq */
.faq{background:#fff;border:1px solid var(--line);border-radius:9px;padding:12px 15px;margin:9px 0}
.faq summary{font-weight:600;cursor:pointer}
.faq summary::-webkit-details-marker{color:var(--accent)}
/* cards / grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:18px 0}
.card{display:block;border:1px solid var(--line);border-radius:12px;padding:16px;background:#fff;color:var(--fg)}
.card:hover{border-color:var(--accent);text-decoration:none}
.card h3{margin:0 0 5px;font-size:16px}
.card p{margin:0;font-size:13px;color:var(--muted)}
.card .price{color:var(--ok);font-weight:700;font-size:14px;margin-top:6px;display:block}
.related ul{padding-left:18px}.related li{margin:4px 0}
/* hero */
.hero{text-align:center;padding:14px 0 6px}
.hero .lede{max-width:640px;margin:0 auto 16px}
/* disclaimer / footer */
.disclaimer{background:var(--warn);border:1px solid var(--warnline);border-radius:9px;padding:10px 13px;color:#6b5900;font-size:14px;margin:18px 0}
.site-foot{border-top:1px solid var(--line);background:#fff}
.site-foot .inner{max-width:1100px;margin:0 auto;padding:22px 18px;color:var(--muted);font-size:13px}
.site-foot nav{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:8px}
.ad-slot{margin:22px 0;min-height:1px}.ad-slot:empty{display:none}

/* ===== interactive tool ===== */
.tool-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;margin:14px 0}
@media(max-width:900px){.tool-wrap{grid-template-columns:1fr}}
.panel{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
.tool-wrap label{display:block;font-size:12px;color:var(--muted);margin:10px 0 3px}
.tool-wrap input,.tool-wrap select,.tool-wrap textarea{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:7px;font-size:14px;font-family:inherit}
.trow{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.seg{display:flex;gap:6px;margin-bottom:6px}
.seg button{flex:1;padding:9px;border:1px solid var(--line);background:#fff;border-radius:8px;font-weight:600;cursor:pointer;font-size:14px}
.seg button.on{background:var(--accent2);border-color:var(--accent);color:var(--accent)}
table.items{width:100%;border-collapse:collapse;margin-top:8px;font-size:13px}
table.items th{text-align:left;color:var(--muted);font-weight:600;font-size:11px;padding:4px}
table.items td{padding:3px}
table.items input{padding:6px 8px}
.x{background:none;border:none;color:#c00;cursor:pointer;font-size:16px;width:28px}
.addbtn{margin-top:8px;background:var(--accent2);color:var(--accent);border:1px solid var(--accent);border-radius:8px;padding:8px 12px;font-weight:600;cursor:pointer}
.presets{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.presets button{font-size:12px;padding:5px 9px;border:1px dashed var(--line);background:#fff;border-radius:14px;cursor:pointer;color:var(--muted)}
.doc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:30px;position:relative;overflow:hidden}
.doc .wm{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;transform:rotate(-30deg);font-size:56px;font-weight:800;color:rgba(11,92,255,.07);pointer-events:none;letter-spacing:4px}
.doc-head{display:flex;justify-content:space-between;align-items:flex-start;gap:20px}
.doc-title{font-size:28px;font-weight:800;letter-spacing:1px;text-transform:uppercase;color:var(--accent)}
.doc h4{font-size:15px;margin:0}
.doc .biz{font-size:13px;color:#333;white-space:pre-line}
.meta{font-size:13px;text-align:right;color:#333}
.parties{display:flex;justify-content:space-between;margin:20px 0 8px;font-size:13px;gap:20px}
.parties .lbl{font-size:10px;text-transform:uppercase;color:var(--muted);letter-spacing:.05em}
table.render{width:100%;border-collapse:collapse;margin-top:8px;font-size:13px}
table.render th{background:var(--accent);color:#fff;text-align:left;padding:8px;font-size:11px;text-transform:uppercase}
table.render th.num,table.render td.num{text-align:right}
table.render td{padding:8px;border-bottom:1px solid var(--line)}
.totals{margin-top:12px;margin-left:auto;width:250px;font-size:13px}
.totals div{display:flex;justify-content:space-between;padding:4px 0}
.totals .grand{border-top:2px solid var(--fg);margin-top:4px;padding-top:8px;font-size:17px;font-weight:800}
.docnotes{margin-top:20px;font-size:12px;color:#444;white-space:pre-line;border-top:1px solid var(--line);padding-top:12px}
.bar{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.btn{padding:11px 16px;border-radius:9px;border:none;font-weight:700;font-size:14px;cursor:pointer}
.btn.primary{background:var(--accent);color:#fff}
.btn.ghost{background:#fff;border:1px solid var(--line)}
.unlock{background:var(--warn);border:1px solid var(--warnline);border-radius:9px;padding:10px 12px;font-size:12px;color:#6b5900;margin-top:10px}
.unlock b{color:#1a1d21}
@media print{
  .site-head,.site-foot,.editor,.bar,.unlock,.crumbs,.ad-slot{display:none!important}
  body{background:#fff}
  main{max-width:none;padding:0}
  .tool-wrap{display:block}
  .doc{border:none;border-radius:0;padding:0}
  .doc .wm{display:var(--wm-print,flex)}
}