/* 4 Link Lab 0.6 — dark "C · track-side high contrast" by default, light "Pit board".
 * Colors live in tokens only. Link colors are used for strokes >= 4 px; text uses the *T variants. */
:root,.theme-dark{
 color-scheme:dark;
 --bg:#060606;--panel:#111;--panel2:#191919;--line:#2c2c2c;--rule:#2c2c2c;--ruleW:1px;
 --text:#fff;--muted:#a0a0a0;--faint:#5a5a5a;
 --up:#ffd400;--upT:#ffd400;--lo:#00c2ff;--loT:#00c2ff;--ic:#ff3d6e;--icText:#060606;--neu:#7dff8a;--neuT:#7dff8a;
 --body:#5a5a5a;--glass:#000;--grid:#141414;--grid2:#0e0e0e;--ds:#c9c9c9;
 --acc:#ffd400;--accText:#000;--bad:#ff5a6e;--cad:#a99bff;--good:#7dff8a;
 --topbar:#111;--topText:#fff;--topMuted:#a0a0a0;--topPanel:#191919;--topLine:#2c2c2c;
 --asCell:transparent;--asLabel:var(--muted);--asText:var(--acc);
 --shadow:0 18px 50px #000c;
 --num:ui-monospace,"SF Mono","Cascadia Mono",Menlo,Consolas,monospace;
 --ui:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]){
 color-scheme:light;
 --bg:#f3f3f1;--panel:#fff;--panel2:#fff;--line:#0a0a0a22;--rule:#0a0a0a;--ruleW:2px;
 --text:#0a0a0a;--muted:#4a4d50;--faint:#9a9ea1;
 --up:#0a0a0a;--upT:#0a0a0a;--lo:#0088cc;--loT:#006da3;--ic:#e5004c;--icText:#fff;--neu:#13a14b;--neuT:#0d7a37;
 --body:#9a9ea1;--glass:#e6e9eb;--grid:#e7e7e4;--grid2:#efefec;--ds:#7a7f83;
 --acc:#ffd400;--accText:#000;--bad:#c4001f;--cad:#5a48d8;--good:#0d7a37;
 --topbar:#0a0a0a;--topText:#fff;--topMuted:#bdbdbd;--topPanel:#1a1a1a;--topLine:#333;
 --asCell:#ffd400;--asLabel:#000;--asText:#000;--shadow:0 18px 50px #0003;
}}
:root[data-theme="light"],.theme-light{
 color-scheme:light;
 --bg:#f3f3f1;--panel:#fff;--panel2:#fff;--line:#0a0a0a22;--rule:#0a0a0a;--ruleW:2px;
 --text:#0a0a0a;--muted:#4a4d50;--faint:#9a9ea1;
 --up:#0a0a0a;--upT:#0a0a0a;--lo:#0088cc;--loT:#006da3;--ic:#e5004c;--icText:#fff;--neu:#13a14b;--neuT:#0d7a37;
 --body:#9a9ea1;--glass:#e6e9eb;--grid:#e7e7e4;--grid2:#efefec;--ds:#7a7f83;
 --acc:#ffd400;--accText:#000;--bad:#c4001f;--cad:#5a48d8;--good:#0d7a37;
 --topbar:#0a0a0a;--topText:#fff;--topMuted:#bdbdbd;--topPanel:#1a1a1a;--topLine:#333;
 --asCell:#ffd400;--asLabel:#000;--asText:#000;--shadow:0 18px 50px #0003;
}
*{box-sizing:border-box}
html,body{margin:0}
body{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;background:var(--bg);color:var(--text);font:13px/1.35 var(--ui);-webkit-font-smoothing:antialiased}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
svg{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
[hidden]{display:none!important}
.skip{position:absolute;left:8px;top:-60px;z-index:50;background:var(--acc);color:var(--accText);padding:8px 12px;border-radius:6px;font-weight:700}
.skip:focus{top:8px}
.spacer{flex:1}
.noscript{padding:24px}

/* Top bar */
.topbar{flex:none;height:48px;display:flex;align-items:center;gap:10px;padding:0 14px;background:var(--topbar);color:var(--topText);border-bottom:var(--ruleW) solid var(--rule);position:relative;z-index:20}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:15px;letter-spacing:-.01em;margin-right:6px;white-space:nowrap}
.logo i{width:18px;height:18px;border-radius:5px;background:var(--acc);display:inline-block}
.menus{display:flex;gap:2px}
.menu{position:relative}
.menu-btn{background:none;border:0;padding:6px 10px;border-radius:6px;color:var(--topMuted)}
.menu-btn:hover,.menu-btn[aria-expanded="true"]{background:var(--topPanel);color:var(--topText)}
.menu-panel{position:absolute;left:0;top:calc(100% + 6px);min-width:220px;padding:6px;background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.menu-panel button{display:flex;justify-content:space-between;gap:16px;text-align:left;background:none;border:0;padding:8px 10px;border-radius:6px;white-space:nowrap}
.menu-panel button:hover,.menu-panel button:focus-visible{background:var(--bg)}
.menu-panel kbd{font:11px var(--num);color:var(--muted)}
.menu-panel hr{border:0;border-top:1px solid var(--line);margin:4px 2px}
.setup-name{display:flex;align-items:center;gap:8px;max-width:280px;padding:5px 10px;border:1px solid var(--topLine);border-radius:7px;background:var(--topPanel);color:var(--topText);white-space:nowrap;overflow:hidden}
.setup-name span:last-child{overflow:hidden;text-overflow:ellipsis}
.dot{flex:none;width:7px;height:7px;border-radius:50%;background:var(--lo)}
.seg{display:flex;border:1px solid var(--topLine);border-radius:7px;overflow:hidden}
.seg button{border:0;background:var(--topPanel);color:var(--topMuted);padding:5px 9px;font-size:12px}
.seg button[aria-pressed="true"]{background:var(--acc);color:var(--accText);font-weight:700}
.icon-btn{width:30px;height:30px;display:grid;place-items:center;border:1px solid var(--topLine);border-radius:7px;background:var(--topPanel);color:var(--topText);padding:0}
.icon-btn svg{width:17px;height:17px}
.icon-btn:disabled{opacity:.35;cursor:default}
#themeBtn .sun{display:none}
:root[data-theme="light"] #themeBtn .sun{display:inline}:root[data-theme="light"] #themeBtn .moon{display:none}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]) #themeBtn .sun{display:inline}:root:not([data-theme="dark"]) #themeBtn .moon{display:none}}
.narrow-only{display:none}

/* Main column */
.app{flex:1 0 auto;display:flex;flex-direction:column}
.strip{display:grid;background:var(--panel);border-bottom:var(--ruleW) solid var(--rule)}
.results{grid-template-columns:1.25fr 1fr 1fr 1.6fr}
.cell{padding:10px 16px 11px;border-right:1px solid var(--line);min-width:0}
.cell:last-child{border-right:0}
.k{font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.v{font:700 30px/1.1 var(--num);letter-spacing:-.02em;margin-top:3px;font-variant-numeric:tabular-nums;white-space:nowrap}
.v small{font-size:15px;color:var(--muted);margin-left:2px;font-weight:500}
.ref{font:12px var(--num);color:var(--muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ref b{color:var(--loT);font-weight:600}
.cell.as{background:var(--asCell)}
.cell.as .k{color:var(--asLabel)}
.cell.as .v,.cell.as .v small{color:var(--asText)}
.cell.as .ref{color:var(--asLabel)}
.cell.as .ref b{color:var(--asText)}
.gauge{height:6px;border-radius:3px;background:var(--panel2);border:1px solid var(--line);position:relative;margin-top:9px}
.gauge i{position:absolute;left:0;top:0;bottom:0;border-radius:3px;background:var(--acc)}
:root[data-theme="light"] .cell.as .gauge{background:#fff6;border-color:#000}:root[data-theme="light"] .cell.as .gauge i{background:#000}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]) .cell.as .gauge{background:#fff6;border-color:#000}:root:not([data-theme="dark"]) .cell.as .gauge i{background:#000}}
.gauge b{position:absolute;left:50%;top:-4px;bottom:-4px;width:1px;background:var(--text)}
.cell.as .gauge b{background:var(--asText)}
.ctx{display:flex;flex-direction:column;justify-content:center;gap:5px;font-size:12px;color:var(--muted)}
.ctx div{display:flex;justify-content:space-between;gap:12px}
.ctx b{font:600 12px var(--num);color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ctx b.bad{color:var(--bad)}
.dt{grid-template-columns:repeat(4,1fr);border-top:var(--ruleW) solid var(--rule)}
.dt.tri{grid-template-columns:repeat(6,1fr)}
.dt .cell{padding:8px 16px}
.dt .v{font-size:19px}

/* Stage */
.stage{position:relative;flex:1 1 auto;min-height:360px;background:var(--bg);overflow:hidden}
#drawing{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;user-select:none;-webkit-user-select:none}
.chips{position:absolute;top:10px;right:12px;display:flex;flex-wrap:wrap;justify-content:flex-end;gap:6px;max-width:calc(100% - 24px)}
.chip{font-size:11px;padding:4px 10px;border-radius:20px;border:1px solid var(--line);background:var(--panel);color:var(--muted)}
.chip[aria-pressed="true"]{color:var(--text);border-color:var(--faint);font-weight:600}
.chip.play{background:var(--acc);border-color:var(--acc);color:var(--accText);font-weight:800;min-width:30px}
.tooltip{position:absolute;pointer-events:none;padding:6px 9px;border-radius:6px;background:var(--panel2);border:1px solid var(--line);box-shadow:var(--shadow);font:11px var(--num);color:var(--muted);white-space:nowrap;z-index:5}
.tooltip b{display:block;color:var(--text);font-weight:700}
.tooltip b.upper{color:var(--upT)}.tooltip b.lower{color:var(--loT)}
.badge{position:absolute;left:14px;top:12px;max-width:min(520px,calc(100% - 28px));padding:6px 10px;border-radius:6px;border:1.5px solid var(--bad);background:var(--panel);color:var(--text);font-size:12px}

/* Dock */
.dock{display:grid;grid-template-columns:1.55fr 1fr;background:var(--panel);border-top:var(--ruleW) solid var(--rule)}
.dock>section{padding:12px 16px;min-width:0}
.dock>section+section{border-left:1px solid var(--line)}
.dh{display:flex;align-items:center;justify-content:space-between;margin-bottom:9px;gap:8px}
.dh h3{margin:0;font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);font-weight:700}
.link{background:none;border:0;padding:2px 4px;color:var(--muted);font-size:12px;text-decoration:underline;text-underline-offset:2px}
.hg{display:grid;grid-template-columns:auto 1fr 1fr;gap:7px 10px;align-items:center}
.hg .col{font-size:11px;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}
.rowl{font-size:12px;font-weight:700;display:flex;align-items:center;gap:7px;white-space:nowrap}
.rowl i{width:14px;height:4px;border-radius:2px;display:inline-block}
.rowl.upper i{background:var(--up);box-shadow:0 0 0 1px var(--line)}.rowl.lower i{background:var(--lo)}
.stp{display:flex;align-items:center;border:1px solid var(--line);border-radius:8px;background:var(--panel2);height:36px;overflow:hidden;min-width:0}
.stp button{flex:none;width:30px;height:100%;border:0;background:none;color:var(--muted);font-size:16px}
.stp button:disabled{opacity:.3;cursor:default}
.stp select{flex:1;min-width:0;height:100%;border:0;border-left:1px solid var(--line);border-right:1px solid var(--line);background:var(--panel2);font:600 12px var(--num);padding:0 10px;appearance:none;-webkit-appearance:none;text-overflow:ellipsis;cursor:pointer}
.stp .c{flex:1;min-width:0;font:12px var(--num);color:var(--muted);padding:0 10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stp .edit{width:auto;padding:0 10px;font-size:12px}
.dyn{display:grid;grid-template-columns:1fr auto;gap:2px 10px;align-items:center;margin-bottom:8px}
.dyn label{font-size:12px}
.dyn input[type=text]{width:78px;text-align:right;background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:3px 6px;font:600 12px var(--num)}
.dyn input[aria-invalid="true"]{border-color:var(--bad)}
.dyn input[type=range]{grid-column:1/3;width:100%;margin:4px 0 0;accent-color:var(--acc);height:18px}

/* Footer, dialog, toast */
.foot{flex:none;display:flex;gap:14px;padding:6px 16px;font-size:11px;color:var(--muted);border-top:1px solid var(--line);background:var(--bg)}
.foot .bad{color:var(--bad)}
dialog{border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text);padding:0;width:min(560px,calc(100vw - 32px));max-height:calc(100dvh - 48px);box-shadow:var(--shadow)}
dialog::backdrop{background:#0008}
.dlg{display:flex;flex-direction:column;max-height:calc(100dvh - 48px)}
.dlg-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line)}
.dlg-head h2{margin:0;font-size:16px}
.dlg-head .icon-btn{background:var(--panel2);border-color:var(--line);color:var(--text)}
.dlg-body{padding:14px 16px;overflow:auto}
.dlg-body p{margin:0 0 12px;color:var(--muted)}
.dlg-actions{display:flex;justify-content:flex-end;gap:8px;padding:12px 16px;border-top:1px solid var(--line)}
.dlg-actions:empty{display:none}
.btn{border:1px solid var(--line);border-radius:7px;padding:7px 14px;background:var(--panel2);font-weight:600}
.btn.primary{background:var(--acc);border-color:var(--acc);color:var(--accText)}
.choices{display:grid;gap:6px}
.choice{display:flex;justify-content:space-between;gap:12px;align-items:center;text-align:left;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--panel2)}
.choice:hover{border-color:var(--faint)}
.choice small{color:var(--muted)}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);max-width:min(560px,calc(100vw - 32px));padding:10px 14px;border-radius:8px;background:var(--panel2);border:1px solid var(--line);box-shadow:var(--shadow);z-index:60}
.toast.bad{border-color:var(--bad)}

/* Narrow screens: stacked, no horizontal scroll */
@media (max-width:899px){
 .narrow-only{display:grid}
 .topbar{gap:8px;padding:0 10px}
 .logo{font-size:14px;margin-right:0}
 .menus{display:none;position:absolute;left:8px;right:8px;top:52px;flex-direction:column;padding:6px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow)}
 .menus.open{display:flex}
 .menu-btn{color:var(--muted);text-align:left;width:100%}
 .menu-panel{position:static;box-shadow:none;border:0;padding:0 0 0 10px;min-width:0}
 .setup-name{display:none}
 .results{grid-template-columns:repeat(3,1fr)}
 .results .ctx{grid-column:1/-1;border-top:1px solid var(--line);flex-direction:row;flex-wrap:wrap;gap:4px 14px;padding:6px 12px}
 .results .ctx div{gap:6px}
 .cell{padding:8px 10px}
 .v{font-size:22px}.v small{font-size:12px}
 .ref{font-size:11px}
 .stage{min-height:300px;height:52vh;flex:none}
 .chips{left:8px;right:8px;top:8px;justify-content:flex-start}
 .dt,.dt.tri{grid-template-columns:repeat(2,1fr)}
 .dt .cell{border-bottom:1px solid var(--line)}
 .dock{grid-template-columns:1fr}
 .dock>section+section{border-left:0;border-top:1px solid var(--line)}
 .hg{gap:6px 8px}
 .foot{flex-wrap:wrap}
}
@media (max-width:560px){.stp select{padding:0 6px;font-size:11px}}
@media (max-width:380px){.seg button{padding:5px 6px}.v{font-size:19px}}
.text-input{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:7px;background:var(--bg);font-size:14px}

/* Side view (SVG). Base svg rule sets stroke; text and fills are explicit here. */
.drawing text{stroke:none;font:11px var(--num)}
.drawing .grid line{stroke:var(--grid);stroke-width:1}
.drawing .ground{stroke:var(--faint);stroke-width:1.5}
.drawing .body-shell{fill:var(--body);fill-opacity:.13;stroke:var(--body);stroke-width:1.5}
.drawing .body-glass{fill:var(--glass);fill-opacity:.55;stroke:var(--body);stroke-width:1}
.drawing .body-line{stroke:var(--body);stroke-opacity:.5;stroke-width:1}
.drawing .body-tube{stroke:var(--body);stroke-width:3}
.drawing .tire{fill:var(--bg);fill-opacity:.4;stroke:var(--faint);stroke-width:2.5}
.drawing .wheel{stroke:var(--faint);stroke-opacity:.6;stroke-width:1}
.drawing .hub{fill:var(--faint);stroke:none}
.drawing .housing{fill:var(--panel2);stroke:var(--muted);stroke-width:1.4}
.drawing .ghost{stroke:var(--muted);stroke-width:3;stroke-dasharray:6 5;opacity:.55}
.drawing .neutral{stroke:var(--neu);stroke-width:1.4;stroke-dasharray:7 6}
.drawing .neutral-label{fill:var(--neuT);letter-spacing:.04em}
.drawing .ext{stroke:var(--text);stroke-opacity:.5;stroke-width:1;stroke-dasharray:3 4}
.drawing .shaft{stroke:var(--ds);stroke-width:5;stroke-opacity:.55}
.drawing .trans{fill:var(--panel2);stroke:var(--ds);stroke-opacity:.7;stroke-width:1}
.drawing .plate{stroke-width:1}
.drawing .plate.upper{fill:var(--up);fill-opacity:.12;stroke:var(--up);stroke-opacity:.5}
.drawing .plate.lower{fill:var(--lo);fill-opacity:.12;stroke:var(--lo);stroke-opacity:.5}
.drawing .link{stroke-width:6;stroke-linecap:round}
.drawing .link.upper{stroke:var(--up)}.drawing .link.lower{stroke:var(--lo)}
.drawing .rod{fill:var(--bg);stroke-width:2.4}
.drawing .rod.upper{stroke:var(--up)}.drawing .rod.lower{stroke:var(--lo)}
.drawing .hole{fill:var(--bg);stroke-width:1.5}
.drawing .hole.upper{stroke:var(--up)}.drawing .hole.lower{stroke:var(--lo)}
.drawing .hole.excluded{stroke-dasharray:2 2;opacity:.55}
.drawing .hole-g.hot .hole{stroke-width:3}
.drawing .hole-g.hot .hole.upper{fill:var(--up)}.drawing .hole-g.hot .hole.lower{fill:var(--lo)}
#drawing.picking{cursor:pointer}
.drawing .lbl.upper{fill:var(--upT)}.drawing .lbl.lower{fill:var(--loT)}
.drawing .lbl.muted{fill:var(--muted)}.drawing .lbl.faint{fill:var(--muted);letter-spacing:.06em;font-size:10px}
.drawing .cg circle{fill:var(--panel2);stroke:var(--text);stroke-width:1.4}.drawing .cg path{fill:var(--text);stroke:none}
.drawing .ic-ring{stroke:var(--ic);stroke-width:1.8}.drawing .ic-dot{fill:var(--ic);stroke:none}
.drawing .ic-tag{fill:var(--ic);stroke:none}.drawing .ic-text{fill:var(--icText);font-weight:700}
.drawing .dim{stroke:var(--faint);stroke-width:1}.drawing .dim-bg{fill:var(--bg);stroke:none}
#drawing.unsolved .link,#drawing.unsolved .rod{opacity:.35}
#drawing{cursor:grab}#drawing:active{cursor:grabbing}

/* Dialog forms */
dialog.wide{width:min(900px,calc(100vw - 32px))}
.dlg-form{display:flex;flex-direction:column;gap:14px}
.form-section h3{margin:0 0 8px;font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}
.form-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px 16px}
.field{display:flex;flex-direction:column;gap:4px;min-width:0}
.field label,.field-label{font-size:12px;color:var(--text)}
.field input[type=text],.field select{width:100%;padding:7px 9px;border:1px solid var(--line);border-radius:7px;background:var(--bg);font:600 13px var(--num);min-width:0}
.field input[aria-invalid="true"]{border-color:var(--bad)}
.field-hint{font-size:11px;color:var(--muted)}
.field-msg{font-size:11px;color:var(--bad);min-height:0}
.field-msg:empty{display:none}
.note{margin:0;font-size:12px;color:var(--muted)}
.dlg-error{margin:0;color:var(--bad);font-size:12px;min-height:1em}
.dlg-error:empty{display:none}
.seg-choice{display:flex;flex-wrap:wrap;border:1px solid var(--line);border-radius:7px;overflow:hidden;width:max-content;max-width:100%}
.seg-choice label{position:relative;cursor:pointer}
.seg-choice input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.seg-choice span{display:block;padding:6px 10px;font-size:12px;color:var(--muted);background:var(--panel2)}
.seg-choice input:checked+span{background:var(--acc);color:var(--accText);font-weight:700}
.seg-choice input:focus-visible+span{outline:2px solid var(--acc);outline-offset:-2px}
.btn:disabled{opacity:.45;cursor:default}

/* Bracket editor */
.tabs{display:flex;flex-wrap:wrap;gap:4px;border-bottom:1px solid var(--line);margin-bottom:10px}
.tab{border:0;border-bottom:3px solid transparent;background:none;padding:8px 12px;color:var(--muted);font-weight:600}
.tab[aria-selected="true"]{color:var(--text);border-bottom-color:var(--acc)}
.be-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:18px;margin-top:8px}
.be-table{overflow:auto;max-height:46vh;border:1px solid var(--line);border-radius:8px}
.be-table table{border-collapse:collapse;width:100%;font-size:12px}
.be-table th{position:sticky;top:0;background:var(--panel2);text-align:left;font-weight:600;color:var(--muted);padding:6px 8px;border-bottom:1px solid var(--line);white-space:nowrap}
.be-table td{padding:4px 8px;border-bottom:1px solid var(--line)}
.be-table td.num{font:700 12px var(--num)}.be-table td.c{text-align:center}
.be-table tr.used td{background:color-mix(in srgb,var(--acc) 14%,transparent)}
.be-table input[type=text]{width:76px;padding:5px 7px;border:1px solid var(--line);border-radius:6px;background:var(--bg);font:600 12px var(--num)}
.be-table input[aria-invalid="true"]{border-color:var(--bad)}
.icon-btn.small{width:24px;height:24px;background:var(--panel2);border-color:var(--line);color:var(--text);font-size:15px}
.be-tools{display:flex;flex-direction:column;gap:10px;margin-top:10px}
.be-row{display:flex;gap:8px;flex-wrap:wrap}
.be-move{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto;gap:8px;align-items:end}
.be-preview svg{width:100%;height:auto;background:var(--bg);border:1px solid var(--line);border-radius:8px}
.be-preview .be-axle{fill:var(--panel2);stroke:var(--muted);stroke-width:1.2}
.be-preview .be-link{stroke-width:5;stroke-linecap:round;opacity:.55}
.be-preview .be-link.upper{stroke:var(--up)}.be-preview .be-link.lower{stroke:var(--lo)}
.be-preview .be-hole{fill:var(--bg);stroke-width:1.6}
.be-preview .be-hole.upper{stroke:var(--up)}.be-preview .be-hole.lower{stroke:var(--lo)}
.be-preview .be-hole.used.upper{fill:var(--up)}.be-preview .be-hole.used.lower{fill:var(--lo)}
.be-preview .be-hole.excluded{stroke-dasharray:2 2;opacity:.6}
.be-preview .be-hole.pending{stroke:var(--neu);stroke-dasharray:3 2}
.be-preview .be-num{fill:var(--muted);stroke:none;font:11px var(--num)}
.be-gen{margin-top:12px}.be-gen h3{margin:0 0 8px;font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}
@media (max-width:760px){.be-grid{grid-template-columns:minmax(0,1fr)}.be-move{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.be-move .btn{grid-column:1/-1}}

/* Adjust bars */
.adj-table table{width:100%;border-collapse:collapse;font-size:12px}
.adj-table th,.adj-table td{padding:6px 8px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.adj-table thead th{color:var(--muted);font-weight:600}
.adj-table tbody th{text-align:left;font-weight:600}
.adj-table td{font:600 12px var(--num)}.adj-table td.chg{color:var(--loT)}
#drawing.can-adjust .link{cursor:pointer}

/* IC cloud, preview ghost, combinations panel */
#cloud,#cad{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.drawing.cad-pick{cursor:crosshair}
.drawing .preview{stroke:var(--acc);stroke-width:3;stroke-dasharray:8 5;opacity:.9}
:root[data-theme="light"] .drawing .preview{stroke:var(--ic)}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]) .drawing .preview{stroke:var(--ic)}}
.drawing .preview-ic{fill:none;stroke:var(--acc);stroke-width:2}
.combos{background:var(--panel);border-top:var(--ruleW) solid var(--rule);padding:12px 16px;display:flex;flex-direction:column;gap:10px}
.combos .dh{margin:0}.cstat{font-size:12px;color:var(--muted)}
.lims{display:flex;flex-wrap:wrap;gap:8px 18px}
.lim{display:flex;align-items:center;gap:6px;font-size:12px}
.lim-label{color:var(--muted)}
.lim input{width:72px;padding:5px 7px;border:1px solid var(--line);border-radius:6px;background:var(--bg);font:600 12px var(--num);text-align:right}
.lim input[aria-invalid="true"]{border-color:var(--bad)}
.ctable{overflow:auto;max-height:320px;border:1px solid var(--line);border-radius:8px}
.ctable table{border-collapse:collapse;width:100%;font:12px var(--num)}
.ctable th{position:sticky;top:0;background:var(--panel2);color:var(--muted);font:600 11px var(--ui);text-align:right;padding:6px 8px;border-bottom:1px solid var(--line);white-space:nowrap}
.ctable th button.sort{background:none;border:0;color:inherit;font:inherit;padding:0}
.ctable td{padding:5px 8px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.ctable td.num,.ctable th.num{font-weight:700;text-align:center}.ctable td.chg{color:var(--loT)}.ctable td.st{text-align:left;color:var(--muted)}
.ctable tbody tr{cursor:pointer}.ctable tbody tr:hover td{background:var(--bg)}
.ctable tr.current td{background:color-mix(in srgb,var(--acc) 12%,transparent)}
.ctable tr.sel td{background:color-mix(in srgb,var(--lo) 18%,transparent)}
.tag{font:600 10px var(--ui);text-transform:uppercase;letter-spacing:.05em;padding:2px 6px;border-radius:4px;background:var(--acc);color:var(--accText)}
.btn.small{padding:3px 10px;font-size:12px}

/* Field readability */
.drawing .body-ghost{fill:none;stroke:var(--muted);stroke-width:1;stroke-dasharray:4 4;opacity:.7}
.drawing .ride{stroke:var(--muted);stroke-width:1.2;stroke-dasharray:2 5}
.drawing .hole-num{fill:var(--muted);font:600 10px var(--num);stroke:none}
.drawing .ride-text{fill:var(--text);font:600 12px var(--num)}
.drawing .ic-off{cursor:pointer}.drawing .ic-arrow{fill:var(--ic);stroke:none}
.drawing .ic-off-text{fill:var(--ic);font:700 11px var(--num)}

/* Measuring guide */
.guide-svg{width:100%;height:auto;background:var(--bg);border:1px solid var(--line);border-radius:8px}
.guide-svg text{stroke:none;fill:var(--text);font:11px var(--ui)}.guide-svg .g-n{fill:var(--muted);font:10px var(--num)}
.guide-svg .g-ground{stroke:var(--faint);stroke-width:1.5}.guide-svg .g-tire{fill:none;stroke:var(--faint);stroke-width:2}
.guide-svg .g-dot{fill:var(--text);stroke:none}.guide-svg .g-axis{stroke:var(--acc);stroke-width:2;fill:none}
.guide-svg .g-plate{fill:var(--panel2);stroke:var(--muted)}.guide-svg .g-hole{fill:var(--bg);stroke:var(--text);stroke-width:1.4}
.guide-svg .g-link{stroke:var(--up);stroke-width:5;stroke-linecap:round}.guide-svg .g-frame{stroke:var(--muted);stroke-width:3}
.guide-svg .g-dim{stroke:var(--muted);stroke-dasharray:3 3;fill:none}
.guide-steps{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:6px;color:var(--text)}

/* Library and import */
.lib-row{display:flex;gap:8px}.lib-row .text-input{flex:1}
.lib-h{margin:6px 0 0;font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}
.lib-table{overflow:auto;max-height:40vh;border:1px solid var(--line);border-radius:8px}
.lib-table table{width:100%;border-collapse:collapse;font-size:12px}
.lib-table th,.lib-table td{padding:7px 10px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
.lib-table th{color:var(--muted);font-weight:600;background:var(--panel2);position:sticky;top:0}
.lib-name{font-weight:700;white-space:normal!important;overflow-wrap:anywhere;unicode-bidi:isolate}
.lib-act{display:flex;gap:6px;justify-content:flex-end}
.note.warn{color:var(--text);border-left:3px solid var(--acc);padding-left:8px}
.imp-csv{display:flex;flex-direction:column;gap:8px}

/* Travel graphs and compare */
.graph-svg{width:100%;height:auto;background:var(--bg);border:1px solid var(--line);border-radius:8px;touch-action:none}
.graph-svg text{stroke:none}.graph-svg .g-tick{fill:var(--muted);font:10px var(--num)}.graph-svg .g-axis{fill:var(--muted);font:11px var(--ui)}
.graph-svg .g-grid{stroke:var(--line);stroke-width:1}.graph-svg .g-zero{stroke:var(--muted);stroke-dasharray:3 3}
.graph-svg .g-cur{fill:none;stroke:var(--acc);stroke-width:2.5}.graph-svg .g-base{fill:none;stroke:var(--lo);stroke-width:2;stroke-dasharray:6 4}
:root[data-theme="light"] .graph-svg .g-cur{stroke:var(--text)}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]) .graph-svg .g-cur{stroke:var(--text)}}
.graph-svg .g-cursor{stroke:var(--text);stroke-width:1}
.graph-legend{display:flex;gap:16px;font-size:12px;color:var(--muted);margin-top:6px}
.graph-legend .lg::before{content:'';display:inline-block;width:18px;height:3px;margin-right:6px;vertical-align:middle;background:var(--acc)}
:root[data-theme="light"] .graph-legend .lg.cur::before{background:var(--text)}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]) .graph-legend .lg.cur::before{background:var(--text)}}
.graph-legend .lg.base::before{background:var(--lo)}
.adj-table tr.diff td,.adj-table tr.diff th{background:color-mix(in srgb,var(--acc) 12%,transparent)}
.be-table td:last-child{padding-right:10px}

/* Report preview */
.report-frame{width:100%;height:56vh;border:1px solid var(--line);border-radius:8px;background:#fff}
.field.wide{grid-column:1/-1}
textarea.text-input{resize:vertical;font:13px var(--ui)}

/* Workshop helpers */
.check{display:flex;gap:10px;align-items:flex-start;font-size:13px;line-height:1.4}
.check input{margin-top:3px;flex:none;width:16px;height:16px;accent-color:var(--acc)}
.wk-result{border:1px solid var(--line);border-radius:8px;padding:10px 12px;background:var(--panel2)}
.wk-result p{margin:2px 0}.wk-big{font:600 20px var(--num)}
.wk-tol summary{cursor:pointer;font-weight:600;font-size:13px;padding:4px 0}
.chip.pick[aria-pressed="true"]{background:var(--cad);border-color:var(--cad);color:#000}

/* Start screen */
.start{position:fixed;inset:0;z-index:50;overflow:auto;background:var(--bg);color:var(--text)}
.start[hidden]{display:none}
.start-inner{max-width:1240px;margin:0 auto;padding:28px 24px 0}
.start-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 16px;padding-bottom:18px;border-bottom:var(--ruleW) solid var(--rule);margin-bottom:22px}
.start-head .logo{font-size:17px}
.start-head h1{margin:0;font-size:26px;letter-spacing:-.02em}
.start-head .note{flex-basis:100%;font-size:13px}
.start-grid{display:grid;grid-template-columns:340px minmax(0,1fr);gap:28px;align-items:start}
.start h2{margin:0 0 10px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.start-side{display:flex;flex-direction:column;gap:14px}
.start-side h2{margin-top:10px}
.start-continue{display:flex;flex-direction:column;align-items:flex-start;gap:4px;text-align:left;padding:18px 18px 16px;border:0;border-radius:10px;background:var(--acc);color:var(--accText);cursor:pointer}
.start-continue .k{font:700 11px var(--ui);text-transform:uppercase;letter-spacing:.08em;color:inherit;opacity:.72}
.start-continue b{font-size:20px;line-height:1.2;overflow-wrap:anywhere}
.start-continue .meta{font:600 12px var(--num)}
.start-continue:hover{filter:brightness(1.05)}
.start-actions{display:flex;flex-wrap:wrap;gap:8px}
.start-actions .btn{flex:1 1 140px}
.start-list{display:flex;flex-direction:column;gap:6px;max-height:42vh;overflow:auto}
.start-item{display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--panel);cursor:pointer}
.start-item b{font-size:14px;overflow-wrap:anywhere}
.start-item .meta,.tpl .meta{font:12px var(--num);color:var(--muted)}
.start-item:hover,.tpl:hover{border-color:var(--acc)}
.start-main .note{margin:-4px 0 12px}
.tpl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.tpl{display:flex;flex-direction:column;align-items:stretch;gap:4px;text-align:left;padding:10px 12px 12px;border:1px solid var(--line);border-radius:10px;background:var(--panel);cursor:pointer;min-width:0}
.tpl[aria-pressed="true"]{border-color:var(--acc);box-shadow:inset 0 0 0 1px var(--acc);background:var(--panel2)}
.tpl-name{display:flex;flex-wrap:wrap;align-items:center;gap:4px 8px;font-size:14px}
.tpl-name b{overflow-wrap:anywhere}
.drawing.thumb{width:100%;height:auto;display:block;margin-bottom:4px}
.drawing.thumb .tire{stroke-width:1.5}
.drawing.thumb .body-shell{stroke-width:1.2;fill-opacity:.18}
.drawing.thumb .thumb-ground{stroke:var(--faint);stroke-width:1}
.start button:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
@media (max-width:760px){
 .start-inner{padding:18px 16px 32px}
 .start-grid{grid-template-columns:minmax(0,1fr);gap:20px}
 .tpl-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
}

.start-bar{position:sticky;bottom:0;margin-top:24px;background:var(--panel);border-top:var(--ruleW) solid var(--rule);box-shadow:0 -8px 24px rgba(0,0,0,.18)}
.start-bar-inner{max-width:1240px;margin:0 auto;padding:14px 24px 16px;display:flex;align-items:center;gap:16px}
.start-bar-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.start-bar-info b{font-size:16px}
.start-bar-info .meta{font:12px var(--num);color:var(--muted)}
.start-bar-info .note{margin-top:2px}
.start-bar .btn.primary{flex:none;padding:10px 18px;font-size:14px}
@media (max-width:760px){
 .start-inner{padding:18px 16px 0}
 .start-bar-inner{padding:12px 16px 14px;flex-direction:column;align-items:stretch;gap:10px}
 .start-bar-info .note{display:none}
}