/* RepairPath — plain CSS, no build step */
:root{
  --acc:#0B5F8A; --acc2:#5FA8D3; --acc-soft:#EEF5FA;
  --grn:#2E8B57; --grn-soft:#E8F5EE; --red:#C0392B; --red-soft:#FBE9E7;
  --org:#C0661A; --org-soft:#FDF2E6; --pur:#7D3C98; --pur-soft:#F4ECF7;
  --bg:#ffffff; --bg2:#f6f8fa; --card:#ffffff; --text:#1f2328; --muted:#5b6570; --line:#dfe3e8;
  --radius:12px; --shadow:0 1px 2px rgba(0,0,0,.05),0 4px 14px rgba(0,0,0,.05);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  color-scheme: light;
}
html[data-theme="dark"]{
  --acc:#5FB3E4; --acc2:#8fd0f5; --acc-soft:#12283a;
  --grn:#5cc98d; --grn-soft:#11291c; --red:#ff7b6b; --red-soft:#32160f;
  --org:#f0a35e; --org-soft:#33220f; --pur:#c79be0; --pur-soft:#26182e;
  --bg:#0f1419; --bg2:#151b22; --card:#171e26; --text:#e6edf3; --muted:#9aa7b4; --line:#2a333d;
  --shadow:0 1px 2px rgba(0,0,0,.4);
  color-scheme: dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:17px;line-height:1.65;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--acc)} a:hover{text-decoration-thickness:2px}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--acc2);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-999px;top:0;background:var(--acc);color:#fff;padding:8px 14px;z-index:100}
.skip:focus{left:8px}

/* header */
.top{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{max-width:1240px;margin:0 auto;display:flex;align-items:center;gap:14px;padding:10px 18px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.12rem;color:var(--text);text-decoration:none;white-space:nowrap}
.brand svg{width:30px;height:30px}
/* main navigation: 6 primary links + "More" menu; drawer on small screens */
.nav{display:flex;align-items:center;gap:2px;margin-left:10px}
.nav-main{display:flex;gap:2px}
.nav a,.more-btn{color:var(--muted);text-decoration:none;padding:8px 12px;border-radius:9px;font-size:.93rem;font-weight:600;white-space:nowrap;line-height:1.2}
.nav-main a{position:relative}
.nav a:hover,.more-btn:hover{color:var(--text);background:var(--bg2)}
.nav-main a[aria-current="page"],.more-btn.is-current{color:var(--acc)}
.nav-main a[aria-current="page"]::after,.more-btn.is-current::after{content:"";position:absolute;left:12px;right:12px;bottom:-11px;height:3px;border-radius:3px 3px 0 0;background:var(--acc)}
.nav-main .ni{display:none}
.nav-more{position:relative}
.more-btn{position:relative;border:0;background:none;font-family:inherit;cursor:pointer;display:flex;align-items:center;gap:5px}
.more-btn .chev{font-size:.7rem;transition:transform .15s}
.more-btn[aria-expanded="true"]{color:var(--text);background:var(--bg2)}
.more-btn[aria-expanded="true"] .chev{transform:rotate(180deg)}
.more-menu{display:none;position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);width:min(620px,92vw);background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 40px rgba(15,30,45,.16);padding:16px;grid-template-columns:repeat(3,1fr);gap:6px 14px;z-index:60}
.more-menu.open{display:grid}
.mm-h{font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:4px 10px 6px}
.more-menu a{display:flex;gap:10px;align-items:flex-start;padding:9px 10px;white-space:normal;color:var(--text)}
.more-menu a .ni{font-size:1.15rem;line-height:1.2}
.more-menu a strong{display:block;font-size:.92rem}
.more-menu a small{display:block;color:var(--muted);font-weight:500;font-size:.8rem;margin-top:2px}
.more-menu a[aria-current="page"]{background:var(--acc-soft)}
.nav-search{display:none}
.top-tools{margin-left:auto;display:flex;gap:8px;align-items:center}
.search-mini{display:flex}
.search-mini input{width:180px;padding:8px 13px;border:1px solid var(--line);border-radius:999px;background:var(--bg2);color:var(--text);font:inherit;font-size:.9rem}
.icon-btn{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:999px;width:38px;height:38px;display:grid;place-items:center;cursor:pointer;font-size:1.05rem}
.menu-btn{display:none}
.menu-btn .mb-t{font-size:.88rem;font-weight:700}
@media (max-width:1240px){.search-mini input{width:130px}}
@media (max-width:1120px){
  .menu-btn{display:flex;width:auto;padding:0 14px;gap:7px;border-radius:999px}
  .nav{display:none;position:fixed;top:59px;left:0;right:0;bottom:0;margin:0;overflow-y:auto;background:var(--bg);flex-direction:column;align-items:stretch;gap:14px;padding:16px 18px 40px;border-top:1px solid var(--line)}
  .nav.open{display:flex}
  body.nav-open{overflow:hidden}
  body.nav-open .top{backdrop-filter:none;background:var(--bg)}
  .nav-search{display:block;order:-1}
  .nav-search input{width:100%;padding:12px 15px;border:1px solid var(--line);border-radius:12px;background:var(--bg2);color:var(--text);font:inherit;font-size:1rem}
  .nav-main{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
  .nav-main a{display:flex;align-items:center;gap:10px;padding:14px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--text);font-size:1rem}
  .nav-main a[aria-current="page"]{border-color:var(--acc);background:var(--acc-soft)}
  .nav-main a[aria-current="page"]::after{display:none}
  .nav-main .ni{display:inline;font-size:1.25rem}
  .more-btn{display:none}
  .more-menu{display:grid;position:static;transform:none;width:auto;box-shadow:none;border:0;padding:0;background:none;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:4px 14px}
  .more-menu a{padding:11px 10px}
}
@media (max-width:620px){.search-mini{display:none}.brand span{font-size:1.05rem}}

/* layout */
.wrap{max-width:1240px;margin:0 auto;padding:26px 18px 60px}
.narrow{max-width:860px}
.layout{display:grid;grid-template-columns:260px minmax(0,1fr) 210px;gap:34px}
@media (max-width:1180px){.layout{grid-template-columns:240px minmax(0,1fr)}.toc{display:none}}
@media (max-width:860px){.layout{grid-template-columns:minmax(0,1fr)}.side{display:none}.side.open{display:block}}
.side{position:sticky;top:76px;align-self:start;max-height:calc(100vh - 90px);overflow:auto;font-size:.9rem;padding-right:6px}
.side h3{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:18px 0 6px}
.side a{display:flex;gap:8px;align-items:flex-start;padding:5px 8px;border-radius:7px;color:var(--text);text-decoration:none;line-height:1.35}
.side a:hover{background:var(--bg2)} .side a.cur{background:var(--acc-soft);color:var(--acc);font-weight:700}
.side .dot{flex:0 0 16px;height:16px;border-radius:50%;border:2px solid var(--line);margin-top:1px}
.side a.done .dot{background:var(--grn);border-color:var(--grn)}
.toc{position:sticky;top:76px;align-self:start;font-size:.85rem;max-height:calc(100vh - 90px);overflow:auto}
.toc h4{margin:0 0 8px;font-size:.75rem;text-transform:uppercase;color:var(--muted);letter-spacing:.06em}
.toc a{display:block;color:var(--muted);text-decoration:none;padding:3px 0 3px 10px;border-left:2px solid var(--line)}
.toc a.on{color:var(--acc);border-color:var(--acc)}
.side-toggle{display:none;margin-bottom:12px}
@media (max-width:860px){.side-toggle{display:inline-flex}}

/* typography & content */
h1{font-size:2.1rem;line-height:1.2;margin:.2em 0 .4em;letter-spacing:-.01em}
h2{font-size:1.45rem;margin:1.8em 0 .6em;line-height:1.3;scroll-margin-top:80px}
h3{font-size:1.15rem;margin:1.4em 0 .5em;scroll-margin-top:80px}
.kicker{color:var(--acc);font-weight:800;text-transform:uppercase;font-size:.78rem;letter-spacing:.08em}
.lead{font-size:1.15rem;color:var(--muted)}
.content table{border-collapse:collapse;width:100%;font-size:.92rem;margin:0}
.tscroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1em 0;max-width:100%}
.tscroll table{min-width:520px}
.content th,.content td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.content th{background:var(--bg2);font-weight:700;white-space:nowrap}
.content figure{margin:1.4em 0;padding:12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.content figure img{display:block;margin:0 auto;cursor:zoom-in}
.content figcaption{font-size:.88rem;color:#444;margin-top:8px;text-align:center}
html[data-theme="dark"] .content figure{border-color:#3a4450}
code{font-family:var(--mono);font-size:.88em;background:var(--bg2);padding:.1em .35em;border-radius:5px}
pre{background:var(--bg2);padding:14px;border-radius:10px;overflow:auto}
blockquote{margin:1.2em 0;padding:12px 16px;border-left:4px solid var(--acc);background:var(--acc-soft);border-radius:0 10px 10px 0}
blockquote p{margin:.3em 0}
math{font-size:1.1em}

/* callouts */
.plain,.safety,.tip,.mistake,.watch{border-radius:0 12px 12px 0;padding:12px 16px;margin:1.2em 0;border-left:5px solid}
.plain::before,.safety::before,.tip::before,.mistake::before,.watch::before{display:block;font-weight:800;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}
.plain{background:var(--grn-soft);border-color:var(--grn)} .plain::before{content:"✓ In plain words";color:var(--grn)}
.safety{background:var(--red-soft);border-color:var(--red)} .safety::before{content:"⚠ Safety";color:var(--red)}
.tip{background:var(--acc-soft);border-color:var(--acc)} .tip::before{content:"★ Tip from the bench";color:var(--acc)}
.mistake{background:var(--org-soft);border-color:var(--org)} .mistake::before{content:"✗ Common mistake";color:var(--org)}
.watch{background:var(--pur-soft);border-color:var(--pur)} .watch::before{content:"▶ Watch and read";color:var(--pur)}
.plain p,.safety p,.tip p,.mistake p,.watch p{margin:.3em 0}

/* buttons, cards, forms */
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--card);color:var(--text);padding:9px 16px;border-radius:10px;font:inherit;font-weight:700;font-size:.95rem;cursor:pointer;text-decoration:none}
.btn:hover{border-color:var(--acc);color:var(--acc)}
.btn.primary{background:var(--acc);border-color:var(--acc);color:#fff} .btn.primary:hover{filter:brightness(1.08);color:#fff}
.btn.done{background:var(--grn);border-color:var(--grn);color:#fff}
.btn.sm{padding:5px 10px;font-size:.85rem}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(min(250px,100%),1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);text-decoration:none;color:var(--text);display:block;transition:transform .12s,border-color .12s}
a.card:hover{transform:translateY(-2px);border-color:var(--acc)}
.card h3{margin:.2em 0 .3em;font-size:1.08rem} .card p{margin:0;color:var(--muted);font-size:.93rem}
.card .ico{font-size:1.7rem}
.pill{display:inline-block;font-size:.75rem;font-weight:700;padding:2px 9px;border-radius:999px;background:var(--bg2);color:var(--muted);border:1px solid var(--line)}
.pill.easy{background:var(--grn-soft);color:var(--grn);border-color:transparent}
.pill.medium{background:var(--org-soft);color:var(--org);border-color:transparent}
.pill.advanced{background:var(--red-soft);color:var(--red);border-color:transparent}
input,select,textarea{font:inherit;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:9px;padding:8px 11px}
label{font-weight:600;font-size:.92rem}
.field{display:flex;flex-direction:column;gap:4px;margin-bottom:10px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end}
.out{font-size:1.25rem;font-weight:800;color:var(--acc);margin-top:6px}
.muted{color:var(--muted)} .small{font-size:.87rem}

/* hero */
.hero{background:linear-gradient(135deg,var(--acc) 0%,#0a3f5c 100%);color:#fff;border-radius:20px;padding:46px 36px;margin-bottom:30px;position:relative;overflow:hidden}
.hero h1{font-size:2.5rem;margin:0 0 10px;max-width:720px}
.hero p{font-size:1.15rem;max-width:640px;opacity:.93}
.hero .search-big{display:flex;gap:8px;max-width:560px;margin-top:20px}
.hero .search-big input{flex:1;min-width:0;padding:13px 16px;border-radius:12px;border:0;font-size:1.02rem;color:#111;background:#fff}
.hero .btn{border-color:rgba(255,255,255,.35)}
@media (max-width:600px){.hero{padding:30px 20px}.hero h1{font-size:1.8rem}}

/* progress */
.bar{height:10px;background:var(--bg2);border-radius:999px;overflow:hidden;border:1px solid var(--line)}
.bar>span{display:block;height:100%;background:var(--grn);width:0;transition:width .3s}
#readbar{position:fixed;top:0;left:0;height:3px;background:var(--acc);width:0;z-index:60}

/* lesson nav */
.lesson-foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:40px;padding-top:20px;border-top:1px solid var(--line)}
.complete-box{display:flex;align-items:center;gap:12px;margin:28px 0;padding:16px;border:1px dashed var(--line);border-radius:12px;background:var(--bg2)}

/* job cards */
.job{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);margin-bottom:16px;box-shadow:var(--shadow)}
.job summary{cursor:pointer;padding:16px 18px;display:flex;gap:12px;align-items:center;list-style:none;font-weight:700}
.job summary::-webkit-details-marker{display:none}
.job summary .num{background:var(--acc);color:#fff;border-radius:10px;min-width:36px;height:36px;display:grid;place-items:center;font-weight:800}
.job .body{padding:0 18px 18px}
.job .meta{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.steps{list-style:none;padding:0;counter-reset:s}
.steps li{display:flex;gap:10px;padding:8px 10px;border-radius:8px;align-items:flex-start}
.steps li:hover{background:var(--bg2)}
.steps input{margin-top:5px;width:18px;height:18px;flex:0 0 18px;accent-color:var(--grn)}
.steps li.checked span{text-decoration:line-through;color:var(--muted)}
.jprog{font-size:.85rem;color:var(--muted);margin-left:auto;font-weight:600}

/* troubleshooter */
.choices{display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 22px}
.choice{border:2px solid var(--line);background:var(--card);border-radius:12px;padding:12px 16px;cursor:pointer;font:inherit;font-weight:700;color:var(--text);text-align:left}
.choice:hover,.choice.on{border-color:var(--acc);background:var(--acc-soft);color:var(--acc)}
.result{border:2px solid var(--acc);border-radius:16px;padding:20px;background:var(--card)}
.result ol{padding-left:22px}
.step-label{font-size:.78rem;text-transform:uppercase;font-weight:800;color:var(--muted);letter-spacing:.06em}

/* quiz */
.q{border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:14px;background:var(--card)}
.q .opts{display:grid;gap:8px;margin-top:8px}
.q .opt{text-align:left;border:1px solid var(--line);background:var(--bg2);padding:9px 12px;border-radius:9px;cursor:pointer;font:inherit;color:var(--text)}
.q .opt.right{background:var(--grn-soft);border-color:var(--grn)} .q .opt.wrong{background:var(--red-soft);border-color:var(--red)}
.q .exp{margin-top:10px;font-size:.92rem;display:none} .q.answered .exp{display:block}

/* tables generic */
table.data{border-collapse:collapse;width:100%;font-size:.92rem}
table.data th,table.data td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
table.data th{background:var(--bg2)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}

/* glossary */
.az{display:flex;flex-wrap:wrap;gap:4px;margin:10px 0 20px}
.az button{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:7px;padding:4px 9px;cursor:pointer;font-weight:700}
.az button.on{background:var(--acc);color:#fff;border-color:var(--acc)}
dl.gloss dt{font-weight:800;margin-top:14px} dl.gloss dd{margin:2px 0 0 0;color:var(--muted)}

/* search */
.hit{padding:14px 0;border-bottom:1px solid var(--line)} .hit a{font-weight:700;font-size:1.05rem}
.hit .where{font-size:.8rem;color:var(--muted)} mark{background:#ffe58a;color:#111;border-radius:3px;padding:0 2px}

/* lightbox */
#lb{position:fixed;inset:0;background:rgba(0,0,0,.82);display:none;place-items:center;z-index:200;padding:20px;cursor:zoom-out}
#lb.on{display:grid} #lb img{max-width:96vw;max-height:92vh;background:#fff;border-radius:10px;padding:10px}

footer{border-top:1px solid var(--line);background:var(--bg2);color:var(--muted);font-size:.88rem}
footer .wrap{padding:26px 18px;display:grid;gap:18px;grid-template-columns:2fr 1fr 1fr}
footer a{color:var(--muted)}
@media (max-width:700px){footer .wrap{grid-template-columns:1fr}}

.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--text);color:var(--bg);padding:10px 18px;border-radius:10px;font-weight:700;opacity:0;transition:opacity .25s;z-index:300;pointer-events:none}
.toast.on{opacity:1}

@media print{
  .top,.side,.toc,footer,.lesson-foot,.complete-box,.no-print,#readbar,ins.adsbygoogle,.google-auto-placed,.adsbygoogle{display:none!important}
  .layout{display:block} body{font-size:12pt;background:#fff;color:#000}
  .job{break-inside:avoid;box-shadow:none} .job .body{display:block!important}
  a{color:#000;text-decoration:none}
}

/* ===== Shop tools ===== */
.kpis{display:flex;gap:12px;flex-wrap:wrap;margin:12px 0}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px;min-width:150px;box-shadow:var(--shadow)}
.kpi b{display:block;font-size:1.35rem;color:var(--acc)} .kpi span{font-size:.82rem;color:var(--muted)}
.jobform fieldset{border:1px solid var(--line);border-radius:12px;padding:12px 16px 4px;margin:0 0 14px;background:var(--card)}
.jobform legend{font-weight:800;color:var(--acc);padding:0 6px}
.fgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(220px,100%),1fr));gap:0 14px}
.fgrid .wide{grid-column:1/-1}
.jobform textarea,.jobform input,.jobform select{width:100%}
table.data input{width:100%;min-width:70px;padding:5px 8px}
.qcgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(360px,1fr));gap:2px 18px}
.qcrow{display:flex;justify-content:space-between;gap:10px;padding:7px 4px;border-bottom:1px solid var(--line);align-items:center}
.qcbtns{display:flex;gap:10px;white-space:nowrap;font-size:.88rem}
.qcbtns label{font-weight:600;display:flex;gap:4px;align-items:center}
tr.lowrow td{background:var(--red-soft)}
.totals{margin-top:6px;font-size:.95rem}
.lang button{border:1px solid var(--line);background:var(--card);color:var(--text);padding:6px 12px;cursor:pointer;font-weight:700}
.lang button:first-child{border-radius:9px 0 0 9px} .lang button:last-child{border-radius:0 9px 9px 0}
.lang button.on{background:var(--acc);color:#fff;border-color:var(--acc)}
#msgOut{width:100%;min-height:150px;font-size:1rem;line-height:1.5}
.nag{background:var(--org-soft);border:1px solid var(--org);border-radius:12px;padding:10px 14px;margin-bottom:14px}
#printArea{display:none}

/* printable documents */
.doc{font-family:Arial,Helvetica,sans-serif;color:#000;background:#fff;font-size:10.5pt;line-height:1.35}
.doc-head{display:flex;justify-content:space-between;gap:20px;border-bottom:2px solid #000;padding-bottom:8px;margin-bottom:8px}
.doc-shop{font-weight:800;font-size:1.35rem}
.doc-title{font-size:1.25rem;margin:8px 0;letter-spacing:.04em} .doc-title span{float:right;font-family:monospace}
.doc-t{width:100%;border-collapse:collapse;margin:6px 0}
.doc-t th,.doc-t td{border:1px solid #999;padding:4px 7px;text-align:left;vertical-align:top}
.doc-t th{width:28%;background:#f2f2f2}
.doc-t.lines th{width:auto}
.doc-terms{font-size:8.5pt;margin:4px 0 0 0;padding-left:18px}
.sig{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:34px}
.sig div{border-top:1px solid #000;padding-top:4px;font-size:9pt}
.cut{margin:22px 0 10px;color:#666;text-align:center;letter-spacing:2px}
.stub{display:grid;grid-template-columns:1fr 1.3fr 1fr;gap:14px;border:2px dashed #000;padding:10px;font-size:10pt}
.doc-qc{columns:2;font-size:9pt} .doc-qc span{display:block}
.doc-note{font-size:8pt;color:#444;margin-top:16px;border-top:1px solid #ccc;padding-top:6px}
.poster{font-size:12pt} .poster-head{text-align:center;border-bottom:3px solid #000;margin-bottom:10px;padding-bottom:8px}
.poster h2{font-size:1.6rem;margin:8px 0 0;letter-spacing:.1em} .poster h3{margin:14px 0 4px;font-size:1.2rem;border-bottom:1px solid #000}
.cert{display:flex;align-items:center;justify-content:center;min-height:92vh}
.cert-in{border:6px double #0B5F8A;padding:50px 60px;text-align:center;width:100%}
.cert h1{font-size:2.4rem;margin:10px 0 20px;color:#0B5F8A} .cert-name{font-size:2rem;font-weight:800;border-bottom:2px solid #000;display:inline-block;padding:0 30px 4px;margin:6px 0 16px}
@media print{
  body.printing > *:not(#printArea){display:none!important}
  body.printing #printArea{display:block!important}
  @page{margin:12mm}
}

.poster .doc-t{table-layout:fixed}.poster .doc-t td:nth-child(2),.poster .doc-t td:nth-child(3){width:14%}.poster .doc-t td:last-child{width:17%}
.tags{display:grid;grid-template-columns:1fr 1fr;gap:10mm}
.tag{border:2px solid #000;border-radius:6px;padding:4mm;font-size:10pt;width:80mm}
.tag-no{font-family:monospace;font-size:16pt;font-weight:800}
.poster-fig{text-align:center} .poster-fig h1{font-size:22pt;margin:0 0 6mm} .poster-fig img{width:100%;max-height:240mm;object-fit:contain}

/* ===== Exam ===== */
body.exam-mode{user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
body.exam-mode .top,body.exam-mode footer{display:none}
.exbar{position:sticky;top:0;z-index:40;display:flex;justify-content:space-between;align-items:center;gap:10px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 14px;box-shadow:var(--shadow);flex-wrap:wrap}
.exbar-r{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.extimer{font-family:var(--mono);font-size:1.4rem;font-weight:800;color:var(--acc)} .extimer.low{color:var(--red)}
.exwrap{max-width:860px;margin:16px auto}
.exq{min-height:260px} .exq canvas{display:block;max-width:100%;pointer-events:none}
.exq-head{margin-bottom:8px}
.exopts{display:grid;gap:8px;margin-top:14px}
.exopt{display:flex;gap:12px;align-items:center;text-align:left;border:2px solid var(--line);background:var(--bg2);border-radius:10px;padding:8px 10px;cursor:pointer;color:var(--text)}
.exopt:hover{border-color:var(--acc2)} .exopt.on{border-color:var(--acc);background:var(--acc-soft)}
.exmark{flex:0 0 30px;height:30px;display:grid;place-items:center;font-weight:800;border:2px solid var(--line);background:var(--card)}
.exmark.ci{border-radius:50%} .exmark.sq{border-radius:6px}
.exopt.on .exmark{background:var(--acc);color:#fff;border-color:var(--acc)}
.exorder{padding-left:26px;margin-top:14px} .exorder li{display:flex;justify-content:space-between;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;padding:6px 8px;margin-bottom:6px;background:var(--bg2)}
.ordbtns{display:flex;gap:4px}
.exnav{display:flex;flex-wrap:wrap;gap:5px;margin-top:18px}
.qn{width:38px;height:34px;border:1px solid var(--line);background:var(--card);border-radius:7px;cursor:pointer;font-weight:700;color:var(--text)}
.qn.ans{background:var(--grn-soft);border-color:var(--grn)} .qn.flag{box-shadow:inset 0 -4px 0 var(--org)} .qn.cur{outline:3px solid var(--acc)}
.violbox{position:fixed;inset:0;background:rgba(0,0,0,.75);z-index:500;place-items:center;padding:20px}
.viol-in{background:var(--card);color:var(--text);max-width:520px;border-radius:16px;padding:26px;text-align:center;border:3px solid var(--red)}
@media print{ body.exam-mode #examApp{display:none!important} }
.certx{display:flex;align-items:center;justify-content:center;min-height:180mm}
.certx-in{border:8px double #0B5F8A;padding:16mm 18mm;text-align:center;width:100%;font-size:12pt}
.certx-brand{font-weight:800;color:#0B5F8A;letter-spacing:.2em;text-transform:uppercase}
.certx-k{font-size:24pt;font-weight:800;letter-spacing:.08em;margin:6mm 0}
.certx-name{font-size:26pt;font-weight:800;border-bottom:2px solid #000;display:inline-block;padding:0 12mm 2mm;margin:2mm 0 4mm}
.certx-title{font-size:17pt;font-weight:800;color:#0B5F8A;margin:2mm 0 4mm}
.certx-meta{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6mm;margin-top:8mm;font-size:10pt}
.certx-foot{font-size:8pt;color:#444;margin-top:8mm;word-break:break-all}
@media print{ body.printing:has(.certx){} }

/* auto-placed Google ads: keep them tidy and out of printouts */
.google-auto-placed{margin:22px auto!important;clear:both}
body.printing ins.adsbygoogle,body.printing .google-auto-placed{display:none!important}

/* lesson checklist tables */
.checklist-table td:first-child{text-align:center;width:56px}
.checklist-table input[type=checkbox]{width:20px;height:20px;accent-color:var(--acc);cursor:pointer}
.checklist-table tr.got td:not(:first-child){color:var(--muted);text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--muted) 60%,transparent)}

/* small screens: form rows stack instead of pushing the page sideways */
@media (max-width:620px){.row .field{flex:1 1 100%;min-width:0}.row .field input,.row .field select,.row .field textarea{width:100%;max-width:100%}select,input,textarea{max-width:100%}}
/* formulas never push the page sideways */
.content math{max-width:100%;overflow-x:auto;overflow-y:hidden;vertical-align:middle}
.content math[display=block]{display:block;padding:4px 0}
.field{min-width:0}
select{max-width:100%}
/* two-column tool layouts (inline grid styles) stack on phones */
@media (max-width:760px){.grid[style*="grid-template-columns"]{grid-template-columns:minmax(0,1fr)!important}}
.content p,.content li,.content td,.content blockquote{overflow-wrap:break-word}
.content a,.content code{overflow-wrap:anywhere}
/* shop tool tabs: one swipeable row on phones */
@media (max-width:760px){
  nav.choices[aria-label="Shop tools"]{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;margin-left:-18px!important;margin-right:-18px!important;padding:0 18px 4px;gap:8px;mask-image:linear-gradient(90deg,#000 88%,transparent)}
  nav.choices[aria-label="Shop tools"]::-webkit-scrollbar{display:none}
  nav.choices[aria-label="Shop tools"] .choice{flex:0 0 auto;white-space:nowrap}
}