/* Skimmer build guide v2 (copied to guide/style.css by tools/guide_v2.py). Mobile first, tested at 390x844. */
:root{--fg:#1b1b1b;--muted:#555;--bg:#f6f5f0;--card:#fff;--line:#dcdcd4;--accent:#e86a00;--ok:#1d7a35;--warn:#fff4d6;--warnb:#e0a400;
--note:#eef5ff;--noteb:#6a9be0;--stop:#fdeceb;--stopb:#c0392b;--hdr:132px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--hdr) + 8px)}
body{margin:0;font:17px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--fg);background:var(--bg)}
img{max-width:100%;height:auto}
code{background:#efeee6;padding:1px 4px;border-radius:4px;font-size:.92em;word-break:break-word}
pre{background:#f3f3ee;border:1px solid #e3e3da;padding:10px;border-radius:8px;overflow-x:auto;font-size:14px;line-height:1.4}

/* header + sticky stage bar */
header{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line);padding:8px 12px 6px;
  padding-top:max(8px,env(safe-area-inset-top))}
.hrow{display:flex;align-items:center;gap:8px}
header h1{font-size:18px;margin:0;flex:1;line-height:1.2}
header h1 small{font-weight:400;color:#888;font-size:13px;white-space:nowrap}
.hbtn{min-width:44px;min-height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:22px;line-height:1}
.bar{height:10px;border-radius:5px;background:#ececec;overflow:hidden;margin-top:6px}
.bar>div{height:100%;width:0;background:var(--accent);transition:width .2s}
.ptext{margin:3px 0 4px;font-size:14px;color:var(--muted)}
.chips{display:flex;gap:6px;overflow-x:auto;padding:2px 0 4px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.chips::-webkit-scrollbar{display:none}
.chip{flex:0 0 auto;display:flex;align-items:center;justify-content:center;gap:3px;min-width:48px;min-height:44px;padding:0 9px;
  border-radius:12px;border:2px solid #ccc;background:#f2f2f2;color:#777;text-decoration:none;font-weight:700;font-size:16px}
.chip .ico::before{content:"\1F512";font-size:12px}
.chip.now{border-color:var(--accent);background:#fff1e3;color:#a14b00}.chip.now .ico::before{content:"\25B6";font-size:11px}
.chip.done{border-color:var(--ok);background:#e3f4e7;color:var(--ok)}.chip.done .ico::before{content:"\2713";font-size:14px}
.chip.open-ahead{border-style:dashed}
.chip.cur{box-shadow:0 0 0 3px rgba(232,106,0,.35)}
.menupanel{display:flex;gap:8px;flex-wrap:wrap;padding:6px 0 4px}
.menupanel[hidden]{display:none}

main{max-width:900px;margin:0 auto;padding:10px}
.banner{display:none;background:var(--warn);border:1px solid var(--warnb);padding:10px;border-radius:10px;margin-bottom:10px;font-size:16px}
section{background:var(--card);border:1px solid var(--line);border-radius:14px;margin:12px 0;overflow:hidden;scroll-margin-top:calc(var(--hdr) + 8px)}
.sh{display:flex;align-items:center;gap:10px;width:100%;text-align:left;background:none;border:0;padding:14px 12px;font:inherit;
  cursor:pointer;color:inherit;min-height:56px}
.sh h2{font-size:20px;margin:0;flex:1;line-height:1.25}
.badge{font-size:13px;padding:4px 9px;border-radius:10px;background:#eee;color:#333;white-space:nowrap}
.badge.done{background:#d9f2df;color:var(--ok)}.badge.locked{background:#eee;color:#777}.badge.now{background:#ffe7cc;color:#a14b00}
.chev{transition:transform .15s;font-size:14px;color:#888}.open .chev{transform:rotate(90deg)}
.sb{padding:0 12px 14px}
.js section:not(.open) .sb{display:none}
.intro ul{padding-left:20px}.intro li{margin:8px 0}
.lockmsg{display:none;margin:0 0 10px;padding:12px;border-radius:10px;background:#f1f1f1;color:#444;font-size:16px;font-weight:600}
section.locked .lockmsg{display:block}
section.locked .step,section.locked .stop,section.locked .card.part{opacity:.6}
.goal{font-weight:600}
h3.sub{font-size:18px;margin:18px 0 6px;padding-top:10px;border-top:2px solid #eee}

/* figures */
figure{margin:8px 0}
.fig img{display:block;width:100%;border-radius:10px;background:#fff;border:1px solid #e6e6de;cursor:zoom-in}
.fig.k-diagram img{max-width:560px}
.fig figcaption{font-size:13px;color:var(--muted);margin-top:4px;line-height:1.35}
.fig.k-vendor figcaption::before{content:"\1F4F7  ";}
.fig.wide img{max-width:100%}
.figs{display:grid;grid-template-columns:1fr;gap:6px;margin:6px 0 4px}
.figs.n2 .k-cad img,.figs.n2 .k-vendor img,.figs.n3 .k-cad img{max-height:340px;object-fit:contain}
.k-vendor img,.k-stock img,.k-cad img{object-fit:contain}

/* cards (parts + tools) */
.cards{display:grid;grid-template-columns:1fr;gap:10px}
.card{border:1px solid var(--line);border-radius:12px;background:#fff;padding:10px;display:grid;grid-template-columns:118px 1fr;gap:10px;
  scroll-margin-top:calc(var(--hdr) + 8px)}
.card .gallery{display:flex;flex-direction:column;gap:6px}
.card .gallery .fig{margin:0}
.card .gallery .fig img{aspect-ratio:1/1;object-fit:contain;padding:4px}
.card .gallery .k-svg img,.card .gallery .k-diagram img{aspect-ratio:auto;padding:0}
.card .gallery figcaption{font-size:11.5px}
.card h4{margin:0 0 4px;font-size:17px;line-height:1.3}
.card p{margin:4px 0}
.qty{font-weight:400;color:var(--muted);font-size:14px;white-space:nowrap}
.meta{font-size:15px;color:var(--muted);margin:2px 0 6px}
.v2note{background:#fff8e1;border-left:4px solid #f5a623;padding:6px 10px;border-radius:6px;font-size:15px}
.inv-ticks{display:flex;align-items:center;gap:6px;margin:6px 0 4px;font-size:15px;color:var(--muted)}
.inv-ticks span{margin-right:8px}
.check{grid-column:1/-1}
.card .check{margin-top:2px}
.card .cbody{min-width:0}
.card .cbody .check{grid-column:auto}

/* buttons */
.btn{font:inherit;font-size:16px;font-weight:600;min-height:48px;padding:10px 16px;border-radius:12px;border:2px solid var(--accent);
  background:var(--accent);color:#fff;cursor:pointer;display:inline-flex;align-items:center;gap:6px;touch-action:manipulation}
.btn.ghost{background:#fff;color:#333;border-color:#ccc}
.btn.danger{background:#fff;color:#a12;border-color:#e3b5b5}
.btn.send-btn{background:#1d5fbf;border-color:#1d5fbf}
.check-btn{background:#fff;color:#a14b00;margin-top:4px;width:100%;justify-content:center}
.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;padding:0;margin:-1px}
.cmp{margin-top:10px;border-top:1px dashed #ddd;padding-top:10px}
.cmp[hidden]{display:none}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.pair figure{margin:0}
.pair img{width:100%;aspect-ratio:1/1;object-fit:contain;background:#f7f7f7;border:1px solid #e3e3da;border-radius:10px}
.pair figcaption{font-size:13px;font-weight:600;text-align:center}
.ask{font-size:15px;background:#f4f8ff;border:1px solid #cfe0fb;border-radius:10px;padding:8px 10px}
.cmpbtns{display:flex;flex-wrap:wrap;gap:8px}
.fb{background:#fff8e1;border:1px solid #f5c26b;border-radius:10px;padding:10px;margin-top:8px;font-size:16px}
.fb[hidden]{display:none}

/* steps */
.step{padding:14px 0;border-top:1px solid #eee}
.shead{display:flex;gap:10px;align-items:flex-start}
.shead h4{margin:6px 0 2px;font-size:18px;line-height:1.3}
.num{color:var(--accent);font-weight:800;margin-right:2px}
.step p{margin:6px 0}
.tick{position:relative;flex:0 0 auto;width:48px;height:48px;display:block;cursor:pointer}
.tick input{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}
.tick .box{position:absolute;inset:3px;border:3px solid #888;border-radius:10px;background:#fff}
.tick input:checked+.box{background:var(--ok);border-color:var(--ok)}
.tick input:checked+.box::after{content:"";position:absolute;left:13px;top:4px;width:10px;height:20px;border:solid #fff;border-width:0 4px 4px 0;transform:rotate(45deg)}
.tick.miss input:checked+.box{background:#b33;border-color:#b33}
.tick.miss input:checked+.box::after{left:8px;top:16px;width:22px;height:0;border-width:0 0 4px 0;transform:none}
.tick input:disabled+.box{background:#f2f2f2;border-color:#ccc}
.tick input:focus-visible+.box{outline:3px solid #4a90e2;outline-offset:2px}
.ok{background:#eef8f0;border-left:4px solid var(--ok);padding:8px 10px;border-radius:6px}
.dont{background:var(--warn);border-left:4px solid var(--warnb);padding:8px 10px;border-radius:6px}
.warn{background:var(--warn);border:1px solid var(--warnb);padding:10px;border-radius:10px;margin:8px 0}
.note{background:var(--note);border:1px solid var(--noteb);padding:10px;border-radius:10px;margin:8px 0}
.stop{background:var(--stop);border:2px solid var(--stopb);border-radius:12px;padding:12px;margin-top:14px;display:flex;gap:10px}
.stop h4{margin:4px 0 6px;color:var(--stopb);font-size:18px}
.stop ul{margin:4px 0;padding-left:20px}
.stop .content{flex:1;min-width:0}
.stophint{font-size:15px;color:var(--muted)}
.missing{font-size:15px;color:#a12}
.tw{overflow-x:auto}
table.tbl{border-collapse:collapse;width:100%;font-size:15px;margin:8px 0}
.tbl th,.tbl td{border:1px solid #e1e1d8;padding:6px 8px;text-align:left;vertical-align:top}
.tbl th{background:#f4f4ee}
@media (max-width:640px){
 .tbl thead{display:none}
 .tbl tr{display:block;border:1px solid #e1e1d8;margin:8px 0;border-radius:8px;background:#fff}
 .tbl td{display:block;border:0;border-bottom:1px solid #f0f0ea}
 .tbl td::before{content:attr(data-h) ": ";font-weight:700}
}
@media (min-width:700px){
 .cards{grid-template-columns:1fr 1fr}
 .figs.n2,.figs.n3{grid-template-columns:1fr 1fr}
 .card{grid-template-columns:150px 1fr}
}
.foot{color:#888;font-size:14px;margin:20px 4px}

/* lightbox */
.lightbox{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.9);display:flex;flex-direction:column}
.lightbox[hidden]{display:none}
.lbinner{flex:1;overflow:auto;-webkit-overflow-scrolling:touch;display:flex;align-items:flex-start;justify-content:center;padding:56px 6px 6px}
.lbinner img{background:#fff;border-radius:8px;max-width:none;width:100%;height:auto}
.lbinner img.big{width:max(100%,900px)}
.lbclose{position:absolute;top:max(8px,env(safe-area-inset-top));right:8px;width:48px;height:48px;border-radius:24px;border:0;background:#fff;font-size:22px;z-index:2}
.lbcap{color:#ddd;font-size:14px;margin:6px 10px 12px}

@media print{
 header,.banner,.chev,.check,.lightbox{display:none!important}
 .js section .sb,section .sb{display:block!important}
 section.locked .step,section.locked .stop,section.locked .card.part{opacity:1}
 .lockmsg{display:none!important}
}

/* part cards: big reference picture on top (phone), side by side from 700 px */
.card.part{grid-template-columns:1fr}
.card.part .gallery{display:grid;grid-template-columns:1fr;gap:6px}
.card.part .gallery.multi{grid-template-columns:1fr 1fr}
.card.part .gallery .fig img{aspect-ratio:auto;max-height:260px;width:100%;object-fit:contain}
.card.part .gallery .k-svg img{max-height:none}
.card.part .gallery figcaption{font-size:13px}
@media (min-width:700px){ .card.part{grid-template-columns:200px 1fr} .card.part .gallery.multi{grid-template-columns:1fr} }