:root{
  --ink:#14161a;--ink-2:#3b4048;--muted:#6b7280;--line:#e3e1db;--paper:#faf9f6;--card:#ffffff;
  --accent:#1f6f5c;--accent-ink:#ffffff;--accent-soft:#e6f1ed;--warn:#9a3412;--warn-soft:#fff3ec;
  --radius:10px;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.6;font-size:17px}
a{color:var(--accent)}
a:hover{text-decoration-thickness:2px}
img,svg{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}

/* header */
.site-head{border-bottom:1px solid var(--line);background:var(--card)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);text-decoration:none;font-size:18px;letter-spacing:-.01em}
.brand-mark{display:inline-flex;gap:2px;height:22px;align-items:stretch}
.brand-mark i{display:block;background:var(--ink);border-radius:1px}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{color:var(--ink-2);text-decoration:none;font-size:15px;padding:6px 10px;border-radius:6px}
.nav a:hover,.nav a[aria-current=page]{background:var(--accent-soft);color:var(--accent)}

/* hero */
.hero{padding:40px 0 8px}
.hero h1{font-size:clamp(28px,4.2vw,42px);line-height:1.15;margin:0 0 10px;letter-spacing:-.02em}
.hero p{margin:0;color:var(--ink-2);max-width:680px;font-size:18px}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:10px}
.crumbs a{color:var(--muted)}

/* tool */
.tool{display:grid;grid-template-columns:minmax(0,380px) minmax(0,1fr);gap:24px;margin:28px 0 40px;align-items:start}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.field{margin-bottom:14px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:5px}
.field .hint{font-size:13px;color:var(--muted);margin-top:4px}
input[type=text],select,textarea,input[type=number]{width:100%;font:inherit;font-size:16px;padding:10px 12px;border:1px solid #cfccc4;border-radius:8px;background:#fff;color:var(--ink)}
input[type=text].code,textarea.code{font-family:var(--mono)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.check{display:flex;align-items:center;gap:8px;font-size:15px;margin:6px 0 14px}
.check input{width:18px;height:18px;accent-color:var(--accent)}
input[type=color]{width:100%;height:42px;padding:3px;border:1px solid #cfccc4;border-radius:8px;background:#fff}
details.more summary{cursor:pointer;font-size:14px;font-weight:600;color:var(--ink-2);margin:4px 0 12px}

.preview{min-height:320px;display:flex;flex-direction:column}
.stage{flex:1;display:flex;align-items:center;justify-content:center;padding:24px;border-radius:8px;
  background-image:linear-gradient(45deg,#f1efe9 25%,transparent 25%),linear-gradient(-45deg,#f1efe9 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#f1efe9 75%),linear-gradient(-45deg,transparent 75%,#f1efe9 75%);
  background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0;overflow:auto}
.stage svg{display:block;max-width:100%;height:auto;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.msg{margin:12px 0 0;padding:10px 12px;border-radius:8px;font-size:15px;display:none}
.msg.err{display:block;background:var(--warn-soft);color:var(--warn)}
.msg.ok{display:block;background:var(--accent-soft);color:var(--accent)}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.btn{font:inherit;font-size:15px;font-weight:600;border-radius:8px;padding:10px 16px;border:1px solid var(--ink);background:var(--card);color:var(--ink);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px}
.btn:hover{background:#f3f2ee}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{background:#185a4a}
.btn:disabled{opacity:.45;cursor:not-allowed}

/* bulk */
.bulk-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-top:16px}
.bulk-grid figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:8px;padding:12px;text-align:center}
.bulk-grid figure.bad{border-color:#f0b9a0;background:var(--warn-soft);font-size:14px;color:var(--warn);font-family:var(--mono)}
.bulk-grid svg{max-width:100%;height:auto}

/* content */
.content{padding:8px 0 40px}
.content h2{font-size:26px;letter-spacing:-.01em;margin:40px 0 10px;line-height:1.25}
.content h3{font-size:19px;margin:26px 0 6px}
.content p,.content li{color:#262a31}
.content code{font-family:var(--mono);font-size:.92em;background:#efede7;padding:1px 5px;border-radius:4px}
.callout{border-left:4px solid var(--accent);background:var(--accent-soft);padding:14px 18px;border-radius:0 8px 8px 0;margin:20px 0}
.callout.warn{border-color:var(--warn);background:var(--warn-soft)}
.callout p{margin:0}
table{width:100%;border-collapse:collapse;margin:16px 0;font-size:15px;background:var(--card)}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#f3f2ee;font-weight:600}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px}
.tablewrap table{margin:0}
.faq details{border-bottom:1px solid var(--line);padding:14px 0}
.faq summary{font-weight:600;cursor:pointer}
.faq details p{margin:8px 0 0}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin:18px 0}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-decoration:none;color:var(--ink)}
.card:hover{border-color:var(--accent)}
.card strong{display:block;margin-bottom:4px}
.card span{font-size:14px;color:var(--muted)}

/* footer */
.site-foot{border-top:1px solid var(--line);background:var(--card);padding:28px 0;font-size:14px;color:var(--muted);margin-top:20px}
.site-foot .cols{display:flex;flex-wrap:wrap;gap:28px;justify-content:space-between}
.site-foot a{color:var(--ink-2);text-decoration:none;display:block;margin:3px 0}
.site-foot a:hover{color:var(--accent)}
.site-foot h4{color:var(--ink);font-size:14px;margin:0 0 6px}

@media (max-width:820px){
  .tool{grid-template-columns:1fr}
  .preview{min-height:220px;order:-1}
  body{font-size:16px}
}
@media print{
  .site-head,.site-foot,.hero,.panel.controls,.actions,.content,.crumbs,.msg,.no-print{display:none!important}
  body{background:#fff}
  .tool{display:block;margin:0}
  .panel{border:none;padding:0}
  .stage{background:none;padding:0}
  .stage svg{box-shadow:none}
  .bulk-grid{grid-template-columns:repeat(3,1fr);gap:8px}
  .bulk-grid figure{border:1px dashed #bbb;break-inside:avoid}
}

/* ad spaces: collapsed until AdSense is live; ?ads=preview shows placements */
.ad{display:none;margin:28px auto;text-align:center}
.ad .ad-label{display:block;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.ad.on{display:block;min-height:120px}
.ads-preview .ad:not(.on){display:flex;align-items:center;justify-content:center;min-height:250px;border:2px dashed #c9c5ba;border-radius:8px;background:#f3f2ee}
.ads-preview .ad:not(.on) .ad-label{font-size:13px;margin:0}
@media print{.ad{display:none!important}}