:root{
  --bg:#0f1220; --surface:#171a2b; --surface2:#1e2236; --ink:#eef0f7; --muted:#9aa0b8;
  --line:#2a2f48; --accent:#5b8cff; --accent2:#3ad29f; --warn:#ffb020; --bad:#ff6b6b;
  --radius:14px;
}
@media (prefers-color-scheme: light){
  :root{ --bg:#f6f7fb; --surface:#ffffff; --surface2:#f0f2f8; --ink:#161a2b; --muted:#5b6178; --line:#e3e6f0; }
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC",sans-serif;}
a{color:var(--accent);text-decoration:none}
.wrap{max-width:920px;margin:0 auto;padding:24px}
header.nav{display:flex;align-items:center;gap:20px;max-width:920px;margin:0 auto;padding:18px 24px}
header.nav .brand{font-weight:700;letter-spacing:.02em}
header.nav .brand span{color:var(--accent)}
header.nav nav{margin-left:auto;display:flex;flex-wrap:wrap;justify-content:flex-end;gap:18px;font-size:14px}
h1{font-size:2rem;line-height:1.15;margin:.2em 0;text-wrap:balance}
h2{font-size:1.25rem;margin:1.4em 0 .4em}
.lead{color:var(--muted);font-size:1.08rem}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:26px}
@media(max-width:680px){.grid{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{margin:.1em 0 .3em;font-size:1.15rem}
.card .tag{display:inline-block;font-size:12px;color:var(--accent2);border:1px solid var(--line);
  padding:2px 8px;border-radius:999px;margin-bottom:10px}
.btn{display:inline-block;background:var(--accent);color:#fff;border:0;border-radius:10px;
  padding:11px 18px;font-size:15px;font-weight:600;cursor:pointer}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
label{display:block;font-size:14px;color:var(--muted);margin:14px 0 6px}
input,select,textarea{width:100%;background:var(--surface2);color:var(--ink);border:1px solid var(--line);
  border-radius:10px;padding:11px 12px;font:inherit}
textarea{min-height:120px;resize:vertical}
.row{display:flex;gap:14px}.row>*{flex:1}
.row-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 14px}
.form-grid>div{min-width:0}
.result-card{margin-top:22px}
.purchase-gate{margin-top:22px;padding:20px;background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px}
.purchase-gate h2{margin-top:0}
.purchase-gate .order-form{justify-content:flex-start}
.purchase-gate .order-form input{flex:1 1 220px}
.paid-details{margin-top:22px}
.flag-list{padding-left:1.2em;margin:.5em 0 1em}
.flag-list li{margin:.25em 0}
.print-sheet{display:none}
@media(max-width:680px){.form-grid{grid-template-columns:1fr}}
@media print{
  body>*{display:none!important}
  body>.print-sheet{display:block!important;color:#111;background:#fff;padding:28px;white-space:pre-wrap;font:12pt/1.5 Arial,sans-serif}
}
pre.out{white-space:pre-wrap;background:var(--surface2);border:1px solid var(--line);border-radius:12px;
  padding:16px;margin-top:16px}
table{width:100%;border-collapse:collapse;font-size:14px;margin-top:12px;display:block;overflow-x:auto}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
th{color:var(--muted);font-weight:600}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}
.kpi{background:var(--surface2);border:1px solid var(--line);border-radius:12px;padding:14px}
.kpi .n{font-size:1.5rem;font-weight:700}.kpi .l{color:var(--muted);font-size:13px}
.pos{color:var(--accent2)}.neg{color:var(--bad)}
/* paywall gate */
.gate{position:relative}
.gate.locked .gated{filter:blur(6px);pointer-events:none;user-select:none;max-height:340px;overflow:hidden}
.gate .lockcta{display:none}
.gate.locked .lockcta{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:8px;
  position:absolute;left:0;right:0;top:40px;margin:auto;max-width:420px;padding:22px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.35)}
.lockcta .price{font-size:1.4rem;font-weight:800}
.order-form{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;width:100%;margin-top:6px}
.order-form input{min-width:0;flex:1 1 220px}
.order-form button{flex:0 0 auto}
.order-instructions,.order-status{width:100%;min-height:1.4em}
textarea.neglist{width:100%;min-height:150px;font-family:ui-monospace,Menlo,monospace;font-size:13px}
.muted{color:var(--muted)}.small{font-size:13px}
/* article / SEO guide pages */
.article{max-width:720px}
.article h1{font-size:2rem;margin:.2em 0 .3em}
.article .meta{color:var(--muted);font-size:14px;margin-bottom:1.6em}
.article h2{font-size:1.3rem;margin:1.8em 0 .4em}
.article h3{font-size:1.08rem;margin:1.3em 0 .3em}
.article p,.article li{font-size:1.02rem;line-height:1.7}
.article ul,.article ol{padding-left:1.3em}
.article li{margin:.4em 0}
.cta-box{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:12px;padding:18px 20px;margin:26px 0}
.cta-box h3{margin:.1em 0 .3em}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:10px}
.related{margin-top:8px}
.related a{display:block;padding:6px 0}
footer{color:var(--muted);font-size:13px;border-top:1px solid var(--line);margin-top:40px;padding:20px 0}
.notice{background:var(--surface2);border:1px solid var(--line);border-left:3px solid var(--warn);
  border-radius:8px;padding:10px 14px;font-size:13px;color:var(--muted);margin-top:14px}