:root{--ink:#111827;--ink2:#374151;--muted:#6B7280;--blue:#1D4ED8;--red:#991B1B;--green:#15803D;--orange:#D97706;--purple:#6D28D9;--bg:#F3F4F6;--line:#E5E7EB;--line2:#D1D5DB;--panel:#ffffff;--accent:#1D4ED8;
  --font:Inter,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Liberation Sans","DejaVu Sans",sans-serif}
*{box-sizing:border-box}
html,body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);-webkit-text-size-adjust:100%;font-size:15px}
.top{display:flex;flex-wrap:wrap;gap:.5rem 1rem;align-items:center;justify-content:space-between;padding:.45rem .9rem;background:#111827;color:#fff;position:sticky;top:0;z-index:5}
.brand{font-weight:700;font-size:1.05rem;letter-spacing:.01em;display:flex;align-items:center;gap:.5rem}
.logo{display:inline-block;width:22px;height:22px;border-radius:50%;background:#fff;box-shadow:inset 0 0 0 2px #111827,0 0 0 2px #fff;position:relative}
.logo::after{content:"";position:absolute;left:5px;right:5px;top:10px;height:2px;background:#111827}
.ver{font-size:.68rem;background:#374151;color:#fff;border-radius:4px;padding:.08rem .35rem;font-weight:600}
.pickers{display:flex;flex-wrap:wrap;gap:.5rem}
.pickers label{display:flex;align-items:center;gap:.4rem;font-weight:600;font-size:.9rem;color:#D1D5DB}
select,button,input{font:inherit;color:inherit}
select{min-height:44px;padding:.3rem .5rem;border:1px solid var(--line2);border-radius:8px;background:#fff;max-width:70vw;color:var(--ink)}
.top select{background:#1F2937;color:#fff;border-color:#4B5563}
input[type=text],input:not([type]){min-height:44px;padding:.3rem .6rem;border:1px solid var(--line2);border-radius:8px;width:100%}
button{min-height:44px;min-width:44px;padding:.35rem .8rem;border:1px solid var(--line2);border-radius:8px;background:#fff;cursor:pointer;font-weight:600;touch-action:manipulation;color:var(--ink)}
button:hover{border-color:#9CA3AF;background:#F9FAFB}
button.primary{background:var(--accent);border-color:var(--accent);color:#fff}
button.primary:hover{background:#1E40AF}
button.danger{color:#B91C1C}
button.small{min-height:36px;padding:.2rem .55rem;font-size:.88rem}
button.armed{background:#FEF3C7;border-color:#D97706}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 370px;gap:.8rem;padding:.8rem;max-width:1700px;margin:0 auto}
.board{background:var(--panel);border-radius:10px;border:1px solid var(--line);box-shadow:0 1px 2px rgba(0,0,0,.05);padding:.5rem .6rem;display:flex;flex-direction:column;min-width:0}
.boardhead{border-bottom:1px solid var(--line)}
.titlebar{display:flex;flex-wrap:wrap;gap:.35rem .6rem;align-items:center;padding:.15rem .2rem .45rem;border-bottom:1px solid var(--line)}
.ptitle{font-size:1.45rem;font-weight:700;margin:0;letter-spacing:-.01em;line-height:1.2}
.chip{display:inline-flex;align-items:baseline;gap:.3rem;font-size:.92rem;padding:.18rem .55rem;border-radius:6px;background:#F3F4F6;border:1px solid var(--line);color:var(--ink2);white-space:nowrap}
.chip[hidden]{display:none}
.chip-k{font-size:.68rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:600}
.chip b{font-weight:700;color:var(--ink)}
.chip-def{white-space:normal}
.badge{font-size:.68rem;font-weight:700;padding:.18rem .5rem;border-radius:4px;letter-spacing:.04em;text-transform:uppercase}
.generic{background:#FFFBEB;color:#92400E;border:1px solid #FDE68A}
.editing-badge{display:none;background:#FEF2F2;color:#991B1B;border:1px solid #FECACA}
body.editing .editing-badge{display:inline-block}
.viewbar{display:flex;flex-wrap:wrap;gap:.4rem 1rem;align-items:center;justify-content:space-between;padding:.4rem .1rem}
.seg{display:inline-flex;align-items:center;gap:0;border:1px solid var(--line2);border-radius:8px;overflow:hidden;background:#fff}
.seg-k{font-size:.68rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:600;padding:0 .55rem;align-self:center}
.seg button{border:0;border-left:1px solid var(--line2);border-radius:0;min-height:38px;padding:.2rem .8rem;font-size:.9rem;background:#fff}
.seg button.on{background:#111827;color:#fff}
.svgwrap{border-radius:6px;overflow:hidden;border:1px solid var(--line);display:flex;justify-content:center}
#field{overflow:visible}
#field{width:100%;height:auto;display:block;max-height:calc(100vh - 235px);touch-action:manipulation;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}
body.editing #field{touch-action:none}
/* diagram emphasis */
#field .pl,#field .pt,#field .op,#field .dp{transition:opacity .18s ease}
#field.running #g-lines{opacity:.28}
#field .pl.dim,#field .pt.dim{opacity:.14}
#field .op.dim{opacity:.45}
#field .dp.dim{opacity:.5}
.controls{display:flex;flex-wrap:wrap;gap:.4rem;align-items:center;padding:.5rem .1rem .2rem}
#scrub{flex:1 1 180px;min-width:140px;height:36px;accent-color:var(--accent)}
.clock{font-variant-numeric:tabular-nums;font-weight:600;min-width:3.5em;text-align:right;color:var(--ink2)}
/* assignment table */
.assign-wrap{margin-top:.5rem;border-top:1px solid var(--line);padding-top:.4rem}
.assign-wrap[hidden]{display:none}
.assign-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:.2rem .8rem;padding:0 .2rem}
.assign-head h2{font-size:1rem;margin:.2rem 0;font-weight:700}
.atable{border-collapse:collapse;width:100%;font-size:.88rem;font-variant-numeric:tabular-nums}
.atable th{text-align:left;font-size:.68rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600;padding:.3rem .4rem;border-bottom:1px solid var(--line2)}
.atable td{padding:.28rem .4rem;border-bottom:1px solid var(--line);vertical-align:middle}
.atable tbody tr{cursor:pointer;transition:opacity .15s ease,background .15s ease}
.atable tbody tr:hover{background:#F9FAFB}
.atable tbody tr.sel{background:#FEF9C3}
.atable tbody tr.dim{opacity:.38}
.atable tbody tr.flag td.tgt{color:#92400E;font-weight:700}
.atable td.pos{font-weight:700;white-space:nowrap}
.atable td.sw,.atable th.sw{width:44px;padding-right:0}
.atable td.rl{color:var(--ink2)}
.atable td.src{white-space:nowrap}
.sw-badge{display:inline-flex;width:18px;height:18px;border-radius:50%;background:var(--orange);color:#fff;font-weight:800;font-size:.72rem;align-items:center;justify-content:center;margin-left:8px}
.sw-none{color:#9CA3AF;margin-left:12px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.tnote{margin:.35rem .2rem 0}
.side{display:flex;flex-direction:column;gap:.8rem;min-width:0}
.panel{background:var(--panel);border-radius:10px;border:1px solid var(--line);box-shadow:0 1px 2px rgba(0,0,0,.05);padding:.7rem .9rem}
.panel h3{margin:.1rem 0 .5rem;font-size:1rem;font-weight:700}
.panel h4{margin:.8rem 0 .3rem;font-size:.9rem;color:var(--muted)}
.hint{color:var(--muted);font-size:.9rem;margin:.2rem 0 .6rem}
.row{display:flex;flex-wrap:wrap;gap:.4rem;margin:.5rem 0}
.stack{display:flex;flex-direction:column;gap:.25rem;font-weight:600;margin:.4rem 0}
.check{display:flex;gap:.5rem;align-items:flex-start;font-size:.93rem;line-height:1.3}
.check input{width:22px;height:22px;flex:none;margin-top:1px}
.st{display:inline-block;font-size:.66rem;font-weight:700;padding:.14rem .45rem;border-radius:4px;margin-left:.3rem;vertical-align:middle;letter-spacing:.04em}
.atable .st{margin-left:0}
.st-ok{background:#DCFCE7;color:#166534}.st-flag{background:#FEF3C7;color:#92400E}.st-override{background:#DBEAFE;color:#1E40AF}.st-release{background:#F3F4F6;color:#374151}.st-job{background:#F3F4F6;color:#374151}.st-carry{background:#111827;color:#fff}
.assign{font-size:1.05rem;font-weight:700;margin:.3rem 0}
.rule{font-weight:700}
.ruletext{margin:.2rem 0 .4rem}
ol.clauses{margin:.3rem 0 .5rem;padding-left:1.4rem}
ol.clauses li{margin:.15rem 0;color:var(--muted)}
ol.clauses li.hit{color:var(--ink);font-weight:700}
ol.clauses li.hit::after{content:"  ◀ matched";color:var(--green);font-size:.8rem}
ol.clauses li.amb{color:#92400E;font-weight:700}
ol.clauses li.amb::after{content:"  ◀ ambiguous";font-size:.8rem}
ol.clauses li.coach{color:#92400E;font-weight:700}
ol.clauses li.coach::after{content:"  ◀ needs coach";font-size:.8rem}
.why{background:#F9FAFB;border-left:3px solid var(--line2);padding:.4rem .6rem;border-radius:4px;font-size:.9rem}
.why.flag{border-color:var(--orange);background:#FFFBEB}
.ovr{margin-top:.6rem;padding-top:.5rem;border-top:1px solid var(--line)}
.ovr select{width:100%;max-width:100%}
.muted{color:var(--muted);font-size:.86rem}
ul.flags{list-style:none;margin:0;padding:0;max-height:260px;overflow:auto}
ul.flags li{padding:.4rem .55rem;border-radius:6px;margin:.2rem 0;cursor:pointer;font-size:.9rem;line-height:1.3}
ul.flags li.flag{background:#FFFBEB;border-left:3px solid var(--orange)}
ul.flags li.warn{background:#FEFCE8;border-left:3px solid #CA8A04}
ul.flags li.info{background:#F9FAFB;border-left:3px solid #9CA3AF}
ul.flags li.ok{background:#F0FDF4;border-left:3px solid var(--green);cursor:default}
ul.customs{list-style:none;margin:0;padding:0}
ul.customs li{display:flex;flex-wrap:wrap;align-items:center;gap:.3rem;padding:.35rem 0;border-bottom:1px solid var(--line)}
ul.customs li .nm{flex:1 1 120px;font-weight:600;word-break:break-word}
.legend ul{margin:.6rem 0 0;padding-left:1.1rem;font-size:.86rem;line-height:1.5;color:var(--ink2)}
.lg-grid{display:grid;grid-template-columns:44px 1fr;gap:.3rem .5rem;align-items:center;font-size:.86rem;color:var(--ink2)}
.lg-sym{display:flex;align-items:center}
.lg-def{font-weight:800;color:var(--red);letter-spacing:.06em;font-size:.88rem;white-space:nowrap}
.c-def{color:var(--red)}
.toast{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);background:#111827;color:#fff;padding:.6rem 1rem;border-radius:8px;font-weight:600;z-index:20;max-width:90vw}
.toast.err{background:#991B1B}
/* svg */
.op{cursor:pointer}.dp{cursor:pointer}
body.editing .dp{cursor:grab}
body.picking .dp{cursor:crosshair}
body[data-theme=turf] .svgwrap{border-color:#1F4D29}
@media (max-width:1100px){.layout{grid-template-columns:minmax(0,1fr) 320px}}
@media (max-width:900px){
  .top{position:static}
  .layout{grid-template-columns:1fr;padding:.4rem;gap:.5rem}
  #field{max-height:none}
  .ptitle{font-size:1.25rem}
  .controls button{flex:1 1 auto}
  .brand{font-size:1rem}
  .pickers{width:100%}.pickers label{flex:1 1 100%}.pickers select{flex:1;max-width:none}
  .atable td.rl{display:none}.atable th:nth-child(4){display:none}
}
.rotate-hint{display:none;margin:.2rem .4rem 0;font-size:.85rem;color:var(--muted)}
@media (max-width:600px) and (orientation:portrait){.rotate-hint{display:block}}
@media print{
  .controls,.side,.top,.viewbar,.rotate-hint,.tnote{display:none}
  .layout{display:block;padding:0}
  .board{border:0;box-shadow:none}
  #field{max-height:none}
  .atable tbody tr.dim{opacity:1}
}
.mignote{background:#FFFBEB;border-left:3px solid var(--orange);padding:.4rem .6rem;border-radius:4px;font-size:.86rem;margin:.2rem 0 .5rem}
.ftab{border-collapse:collapse;width:100%;font-size:.86rem;margin:.3rem 0}
.ftab th,.ftab td{text-align:left;padding:.15rem .3rem;border-bottom:1px solid var(--line)}
@media (orientation:landscape) and (max-height:500px){.boardhead{display:flex;align-items:center;gap:.5rem;justify-content:space-between;border-bottom:0}.boardhead .titlebar{border-bottom:0;flex-wrap:nowrap;min-width:0;overflow:hidden}.boardhead .viewbar{flex-wrap:nowrap;gap:.4rem;flex:none}.seg-k,.generic,.chip-k{display:none}.chip-def{white-space:nowrap}.top{position:static;padding:.25rem .5rem;flex-wrap:nowrap}.brand{font-size:.95rem;white-space:nowrap}.pickers{flex-wrap:nowrap}.pickers label{font-size:.85rem}select{min-height:38px;max-width:34vw}.ptitle{font-size:1.1rem}.titlebar{padding:0 .2rem .2rem}.chip{font-size:.8rem}.viewbar{padding:.2rem 0}.seg button{min-height:34px;padding:.1rem .6rem}#field{max-height:calc(100vh - 16px)}.layout{padding:.4rem}}
/* v1.3: video plays – source line, tags, numbering, citations, teaching points */
.badge.generic.video{background:#EFF6FF;color:#1E3A8A;border:1px solid #BFDBFE}
.srcbar{display:flex;flex-wrap:wrap;gap:.3rem .7rem;align-items:center;padding:.3rem .2rem;font-size:.8rem;color:var(--ink2);border-bottom:1px solid var(--line)}
.srcbar[hidden]{display:none}
.src-line{font-style:italic}
.tagbar{display:inline-flex;gap:.35rem;align-items:center}
.tagbtn{border-radius:999px}
.tagbtn.on{background:#1E3A8A;color:#fff;border-color:#1E3A8A}
.atable .cite,.teach .cite,p .cite{display:block;font-size:.68rem;color:var(--muted);margin-top:.1rem;font-style:normal}
.teach .cite,p .cite{display:inline}
.st-verify{background:#FFEDD5;color:#9A3412}
.chip-book{display:inline-block;font-size:.64rem;line-height:1.35;padding:0 .32rem;border-radius:.3rem;border:1px solid #B45309;background:#FEF3C7;color:#78350F;font-weight:600;font-style:normal;white-space:nowrap;vertical-align:baseline}
.verify-note{font-size:.8rem;color:#9A3412;background:#FFF7ED;border:1px solid #FED7AA;border-radius:6px;padding:.3rem .45rem}
.cites,.srcnote{font-size:.76rem;color:var(--muted)}
.teach-wrap{margin-top:.6rem;border-top:1px solid var(--line);padding-top:.4rem}
.teach-wrap[hidden]{display:none}
.teach-wrap h2{font-size:1rem;margin:.2rem 0 .3rem}
.teach-wrap h3{font-size:.86rem;margin:.6rem 0 .2rem}
ul.teach{margin:.2rem 0 .4rem;padding-left:1.1rem;font-size:.84rem}
ul.teach li{margin:.15rem 0}
ul.teach.unsure li{color:#9A3412}
@media (orientation:landscape) and (max-height:500px){#numSeg,.srcbar{display:none}}