:root{--bg:#fafaf7;--fg:#1d1d1b;--mut:#4f4f49;--acc:#1f5f4a;--accfg:#fff;--line:#c9c9bf;--card:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#161614;--fg:#eeeee8;--mut:#b5b5ac;--acc:#5fc2a0;--accfg:#10201a;--line:#44443e;--card:#1f1f1c}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.w{max-width:760px;margin:0 auto;padding:0 20px}
a{color:var(--acc)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--acc);outline-offset:2px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--card);padding:8px;z-index:9}
nav.top{padding:14px 0;border-bottom:1px solid var(--line);font-size:.95rem}
nav.top a{margin-right:16px}
header.hero{padding:32px 0 8px}
h1{font-size:2rem;line-height:1.2;margin:0 0 10px}
h2{margin-top:40px;font-size:1.35rem}
.lead{font-size:1.1rem;color:var(--mut)}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin:14px 0}
form#opts{display:grid;grid-template-columns:1fr 1fr;gap:14px}
form#opts .full{grid-column:1/-1}
label{display:block;font-weight:600;font-size:.95rem;margin-bottom:4px}
input[type=text],input[type=number],select{width:100%;padding:10px;font:inherit;color:var(--fg);background:var(--bg);border:2px solid var(--line);border-radius:8px}
.chk label{display:flex;gap:8px;align-items:center;font-weight:600}
.chk input{width:22px;height:22px}
.hint{color:var(--mut);font-size:.9rem;margin:4px 0 0}
.btn{padding:12px 20px;border-radius:8px;border:2px solid var(--acc);background:transparent;color:var(--acc);font:inherit;font-weight:700;cursor:pointer}
.btn.pri{background:var(--acc);color:var(--accfg)}
.btn:disabled{opacity:.55;cursor:wait}
.actions{display:flex;gap:10px;flex-wrap:wrap}
#status{color:var(--mut);min-height:1.6em}
ul{padding-left:22px}li{margin:6px 0}
details{border-bottom:1px solid var(--line);padding:10px 0}summary{cursor:pointer;font-weight:600}
footer{margin:60px 0 40px;border-top:1px solid var(--line);padding-top:20px;color:var(--mut);font-size:.95rem}
.note{color:var(--mut);font-size:.92rem}
@media (max-width:560px){form#opts{grid-template-columns:1fr}}

/* preview: pages shown scaled on screen, real size when printing */
#preview{margin:18px 0;display:flex;flex-direction:column;gap:14px;align-items:center;overflow-x:auto}
.page{background:#fff;color:#000;box-shadow:0 1px 6px rgba(0,0,0,.35);overflow:hidden;position:relative;page-break-after:always;break-after:page;font-family:Arial,Helvetica,sans-serif}
.page:last-child{page-break-after:auto;break-after:auto}
.page svg{display:block;width:100%;height:auto}
.phead{display:flex;justify-content:space-between;font-weight:700;font-size:14pt;margin-bottom:.3in}
.big{width:100%;max-width:5in;margin:0 auto}
.cover{height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center}
.cover h2{font-size:30pt;margin:0 0 .2in}.cover.small h2{font-size:26pt}.cover p{font-size:14pt;margin:0}
.sols{display:grid;gap:.18in;align-content:start}
.sols.cols2{grid-template-columns:1fr 1fr}.sols.cols3{grid-template-columns:1fr 1fr 1fr}
.sols figure{margin:0}.sols figcaption{font-size:9pt;font-weight:700;margin-bottom:2pt}
@media screen and (max-width:900px){#preview .page{zoom:.55}}
@media print{
  html,body{background:#fff}
  body>*:not(#preview){display:none!important}
  #preview{display:block;margin:0;overflow:visible}
  .page{box-shadow:none;zoom:1!important}
}