/* ==========================================================================
   Light Fighter Reference — static, crawlable, TG-series design language.
   Generated pages link this. Edit here, not per page. (scripts/build-reference.py)
   ========================================================================== */
:root{
  --bg:#070707; --bg-2:#0d0f0e; --card:#0f1110; --elev:#151716;
  --t1:#e9e7e2; --t2:#9b9a95; --t3:#5e5d59; --t4:#3a3a37;
  --accent:#c92a2a; --red:#ff2b2b; --green:#39d98a; --amber:#e8a13a;
  --ln:rgba(255,255,255,.07); --ln2:rgba(255,255,255,.13);
  --fd:'Anton','Space Grotesk',sans-serif;        /* masthead */
  --fh:'Space Grotesk','Inter',sans-serif;         /* sub-heads */
  --fb:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --fl:'JetBrains Mono',ui-monospace,'SF Mono',Consolas,monospace;
  --fs:'Silkscreen','JetBrains Mono',monospace;
  --fp:'VT323',ui-monospace,monospace;             /* terminal numerals */
  --hd:54px; --side:288px; --col:74ch;
  --ease:cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;background:var(--bg);scroll-behavior:smooth}
body{background:var(--bg);color:var(--t1);font-family:var(--fb);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
svg{display:block}
.skip{position:fixed;left:12px;top:-48px;z-index:400;background:var(--accent);color:#fff;font-family:var(--fl);font-size:.72rem;letter-spacing:.06em;padding:9px 14px;transition:top .15s}
.skip:focus{top:12px}

/* atmosphere (behind content) */
.fx{position:fixed;inset:0;pointer-events:none;z-index:0}
.fx-grain{background:url('/tg/media/proto/grain.png') repeat;background-size:128px;opacity:.09;mix-blend-mode:overlay}
.fx-scan{opacity:.5;background:repeating-linear-gradient(0deg,rgba(0,0,0,0) 0 2px,rgba(0,0,0,.13) 2px 3px),radial-gradient(130% 100% at 50% 0%,transparent 60%,rgba(0,0,0,.5))}
@media(prefers-reduced-motion:reduce){.fx{opacity:.04}}

/* ============================ top bar ============================ */
.ref-top{position:fixed;top:0;left:0;right:0;z-index:60;height:var(--hd);display:flex;align-items:center;gap:14px;
  padding:0 clamp(14px,3vw,26px);background:rgba(7,7,7,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--ln);box-shadow:0 1px 0 rgba(201,42,42,.18)}
.ref-brand{font-family:var(--fl);font-size:.74rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#fff;display:flex;align-items:center;gap:9px;white-space:nowrap}
.ref-brand b{color:var(--accent);font-weight:700}
.ref-brand .bd{width:10px;height:10px;background:var(--accent);box-shadow:0 0 8px rgba(201,42,42,.7);flex:0 0 auto}
.ref-menu-btn{display:none;width:38px;height:38px;align-items:center;justify-content:center;background:none;border:1px solid var(--ln2);color:var(--t1);cursor:pointer}
.ref-search-btn{margin-left:auto;display:inline-flex;align-items:center;gap:9px;background:rgba(255,255,255,.04);border:1px solid var(--ln2);color:var(--t2);
  font-family:var(--fl);font-size:.72rem;letter-spacing:.04em;padding:8px 12px;cursor:pointer;transition:border-color .15s,color .15s}
.ref-search-btn:hover{border-color:var(--accent);color:#fff}
.ref-search-btn kbd{font-family:var(--fl);font-size:.62rem;color:var(--t3);border:1px solid var(--ln2);padding:1px 6px}
.ref-back{display:inline-flex;align-items:center;gap:7px;font-family:var(--fl);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--t2);
  border:1px solid var(--ln);padding:7px 11px;transition:color .15s,border-color .15s}
.ref-back:hover{color:#fff;border-color:var(--ln2)}

/* ============================ shell + sidebar ============================ */
.ref-shell{display:flex;padding-top:var(--hd);min-height:100vh;position:relative;z-index:1}
.ref-nav{position:fixed;top:var(--hd);bottom:0;left:0;width:var(--side);z-index:40;overflow-y:auto;
  background:var(--bg-2);border-right:1px solid var(--ln);padding:20px 0 50px}
.nav-cat{font-family:var(--fs);font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);padding:18px 22px 8px}
.nav-cat:first-child{padding-top:4px}
.nav-list{list-style:none}
.nav-link{display:flex;align-items:center;gap:11px;padding:9px 22px;font-family:var(--fl);font-size:.74rem;letter-spacing:.05em;text-transform:uppercase;
  color:var(--t2);border-left:2px solid transparent;transition:color .15s,background .15s,border-color .15s}
.nav-link .nav-ic{width:15px;height:15px;flex:0 0 auto;color:var(--t3)}
.nav-link .nav-ic svg{width:100%;height:100%}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.03)}
.nav-link.active{color:#fff;border-left-color:var(--accent);background:linear-gradient(90deg,rgba(201,42,42,.12),transparent 85%)}
.nav-link.active .nav-ic{color:var(--accent)}
.nav-sub{list-style:none;margin:2px 0 8px}
.nav-sub-link{display:block;padding:6px 22px 6px 48px;font-family:var(--fl);font-size:.7rem;letter-spacing:.01em;color:var(--t3);transition:color .15s,background .15s}
.nav-sub-link:hover{color:var(--t2);background:rgba(255,255,255,.02)}
.nav-sub-link.active{color:var(--accent)}
.nav-scrim{display:none;position:fixed;inset:var(--hd) 0 0 0;z-index:39;background:rgba(0,0,0,.6);backdrop-filter:blur(2px)}

/* ============================ main / doc ============================ */
.ref-main{flex:1;min-width:0;margin-left:var(--side);padding:clamp(26px,4vw,52px) clamp(20px,5vw,64px) 120px}
.ref-doc{max-width:1080px;margin:0 auto}
.ref-hero{margin-bottom:clamp(26px,4vw,40px)}
.kicker{font-family:var(--fs);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:18px;display:flex;align-items:center;gap:10px}
.kicker .kdot{width:7px;height:7px;background:var(--accent);box-shadow:0 0 7px var(--accent);flex:0 0 auto}
.ref-h1{font-family:var(--fd);font-weight:400;font-size:clamp(2.6rem,6vw,4.6rem);line-height:.9;letter-spacing:.01em;text-transform:uppercase;color:var(--t1)}
.ref-lead{font-family:var(--fl);font-size:.92rem;line-height:1.7;color:var(--t2);margin-top:18px;padding-top:16px;border-top:1px solid var(--ln);max-width:80ch}

/* two-column: sticky TOC + units */
.ref-cols{display:grid;grid-template-columns:200px minmax(0,1fr);gap:clamp(2rem,4vw,3.5rem);align-items:start}
.toc{position:sticky;top:calc(var(--hd) + 28px)}
.toc-k{font-family:var(--fl);font-size:.58rem;letter-spacing:.18em;text-transform:uppercase;color:var(--t3);margin-bottom:12px;padding-left:13px}
.toc-ol{list-style:none}
.toc-ol a{display:block;padding:7px 0 7px 13px;border-left:2px solid var(--ln);color:var(--t3);font-family:var(--fl);font-size:.7rem;letter-spacing:.01em;line-height:1.45;transition:color .15s,border-color .15s}
.toc-ol a:hover{color:var(--t1)}
.toc-ol a.active{color:var(--accent);border-left-color:var(--accent)}
.toc-ol a .num{color:var(--t3);margin-right:7px}
.toc-grp{font-family:var(--fs);font-size:.54rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);padding:16px 0 6px 13px;list-style:none}
.unit-grp{font-family:var(--fs);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-top:clamp(2.5rem,5vw,4rem);padding-bottom:12px;border-bottom:1px solid var(--accent)}
.unit-grp + .unit{border-top:none}
.toc-mobile{display:none}

/* units */
.ref-units{min-width:0}
.unit{padding-block:clamp(2rem,4vw,3rem);border-top:1px solid var(--ln);scroll-margin-top:calc(var(--hd) + 20px)}
.unit:first-child{border-top:none;padding-top:0}
.unit-head{display:flex;align-items:baseline;gap:.7rem;margin-bottom:1.2rem}
.unit-n{font-family:var(--fl);font-size:1.35rem;line-height:.8;color:var(--accent);flex:0 0 auto}
.unit-h{font-family:var(--fh);font-weight:700;font-size:clamp(1.5rem,2.6vw,2rem);line-height:1.1;letter-spacing:-.01em;color:var(--t1)}
.unit-body{max-width:var(--col)}
.unit-body>p{color:var(--t2);margin:0 0 1.15rem;line-height:1.72}
.unit-body strong,.unit-body b{color:var(--t1);font-weight:600}
.unit-body a:not(.tool-launch){color:var(--accent);border-bottom:1px solid rgba(201,42,42,.4)}
.unit-body a:not(.tool-launch):hover{border-color:var(--accent)}
.unit-body code{font-family:var(--fl);font-size:.86em;color:#e6a6a6;background:rgba(201,42,42,.1);padding:1px 6px}
.code-block{margin:1.2rem 0;padding:14px 16px;background:#0a0c0b;border:1px solid var(--ln2);border-left:2px solid var(--accent);overflow-x:auto;-webkit-overflow-scrolling:touch}
.code-block code{font-family:var(--fl);font-size:.84rem;line-height:1.65;color:var(--t1);background:none;padding:0;white-space:pre;display:block}
.u-h3{font-family:var(--fl);font-weight:700;font-size:.94rem;text-transform:uppercase;letter-spacing:.05em;color:var(--t1);margin:2rem 0 .9rem}
.u-h3.sources-h{color:var(--t3);font-size:.7rem;letter-spacing:.16em;margin-top:2.4rem}
.u-list{margin:0 0 1.2rem 1.3rem;color:var(--t2)}
.u-list li{margin:.5rem 0;line-height:1.6}
.u-list li::marker{color:var(--accent)}
.src-list{font-family:var(--fl);font-size:.8rem;line-height:1.7;color:var(--t3);max-width:78ch}
.src-list a{color:var(--accent)}
/* citations */
sup.cite{font-family:var(--fl);font-size:.6em;font-weight:700;color:var(--accent);vertical-align:super;line-height:0;padding-left:1px}
sup.cite a{color:var(--accent)}

/* tables */
.tbl-wrap{margin:1.4rem 0;border:1px solid var(--ln);overflow:hidden}
.tbl{width:100%;border-collapse:collapse;font-size:.9rem}
.tbl th{font-family:var(--fl);font-size:.64rem;letter-spacing:.07em;text-transform:uppercase;color:var(--t3);text-align:left;padding:11px 15px;background:rgba(255,255,255,.025);border-bottom:1px solid var(--ln2);white-space:nowrap}
.tbl td{padding:11px 15px;border-bottom:1px solid var(--ln);color:var(--t2);vertical-align:top;line-height:1.5}
.tbl tr:last-child td{border-bottom:none}
.tbl tbody tr:hover{background:rgba(255,255,255,.02)}
.tbl td:first-child{color:var(--t1);font-weight:500}

/* callouts */
.callout{margin:1.4rem 0;border:1px solid var(--ln);border-left-width:3px;padding:16px 19px}
.callout.info{background:rgba(57,217,138,.05);border-left-color:var(--green)}
.callout.warn{background:rgba(201,42,42,.06);border-left-color:var(--accent)}
.callout-t{font-family:var(--fl);font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:7px}
.callout.info .callout-t{color:var(--green)}
.callout.warn .callout-t{color:var(--accent)}
.callout p{color:var(--t2);margin:0;line-height:1.6}

/* checklists */
.ck{list-style:none;display:flex;flex-direction:column;gap:1px;margin:1.2rem 0}
.ck-item label{display:flex;align-items:flex-start;gap:12px;padding:10px 12px;cursor:pointer;min-height:44px;transition:background .12s}
.ck-item label:hover{background:rgba(255,255,255,.03)}
.ck-item input{appearance:none;-webkit-appearance:none;flex:0 0 auto;width:20px;height:20px;margin-top:1px;border:1.5px solid var(--ln2);background:transparent;cursor:pointer;position:relative}
.ck-item input:checked{background:var(--accent);border-color:var(--accent)}
.ck-item input:checked::after{content:'';position:absolute;left:6px;top:2px;width:5px;height:10px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}
.ck-item span{color:var(--t2);line-height:1.5}
.ck-item input:checked + span{color:var(--t3);text-decoration:line-through}

/* tool launch card */
.tool-launch{display:flex;align-items:center;gap:14px;margin:1.4rem 0;padding:16px 18px;background:var(--card);border:1px solid var(--ln2);transition:border-color .16s,transform .16s}
.tool-launch:hover{border-color:var(--accent);transform:translateY(-2px)}
.tool-launch .tl-k{font-family:var(--fs);font-size:.56rem;letter-spacing:.1em;color:var(--accent)}
.tool-launch .tl-n{font-family:var(--fl);font-weight:700;font-size:.95rem;color:#fff}
.tool-launch .tl-go{margin-left:auto;font-family:var(--fl);font-size:.6rem;letter-spacing:.14em;color:var(--t3)}
.tool-launch:hover .tl-go{color:var(--accent)}

/* ============================ hub ============================ */
.hub-main{margin-left:0;max-width:1180px;margin-inline:auto;padding-top:clamp(40px,8vw,90px)}
.hub-hero{margin-bottom:clamp(40px,7vw,72px);max-width:760px}
.hub-h1{font-family:var(--fd);font-weight:400;font-size:clamp(3.4rem,11vw,7rem);line-height:.82;letter-spacing:.01em;text-transform:uppercase;color:var(--t1)}
.hub-lead{font-family:var(--fl);font-size:clamp(.82rem,1.2vw,.95rem);line-height:1.75;color:var(--t2);margin-top:22px;max-width:62ch}
.hub-search-cta{margin:28px 0 0;padding:13px 18px;font-size:.8rem}
.hub-cat{font-family:var(--fs);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:36px 0 16px;padding-bottom:10px;border-bottom:1px solid var(--ln)}
.hub-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.hub-card{position:relative;display:flex;flex-direction:column;min-height:172px;background:var(--card);border:1px solid var(--ln2);padding:22px;transition:border-color .16s,transform .16s,box-shadow .16s}
.hub-card:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:0 16px 34px rgba(0,0,0,.5)}
.hc-ic{width:26px;height:26px;color:var(--accent);margin-bottom:14px}
.hc-ic svg{width:100%;height:100%}
.hc-n{position:absolute;top:18px;right:20px;font-family:var(--fp,'VT323',monospace);font-size:1.4rem;color:var(--t4)}
.hub-card:hover .hc-n{color:var(--accent)}
.hc-t{font-family:var(--fl);font-weight:700;font-size:1.02rem;color:#fff;letter-spacing:.01em;margin-bottom:7px}
.hc-d{font-size:.84rem;line-height:1.5;color:var(--t2);margin-bottom:14px}
.hc-go{margin-top:auto;font-family:var(--fl);font-size:.56rem;letter-spacing:.14em;color:var(--t3)}
.hub-card:hover .hc-go{color:var(--accent)}

/* ============================ tool pages (calculators) ============================ */
.tool-page .ref-main{margin-left:0;max-width:880px;margin-inline:auto}
.tool-wrap{max-width:760px}
.form-group,.calc-field{margin-bottom:1.1rem;display:flex;flex-direction:column}
.form-label,.calc-field label,.calc-grid label{font-family:var(--fl);font-size:.66rem;letter-spacing:.06em;text-transform:uppercase;color:var(--t3);margin-bottom:7px}
.form-input,.form-select,.form-textarea,.calc-field input,.calc-field select,.calc-grid input,.calc-grid select,input[type=text],input[type=number],select,textarea{
  width:100%;font-family:var(--fb);font-size:16px;color:var(--t1);background:rgba(255,255,255,.04);
  border:1px solid var(--ln2);border-radius:2px;padding:12px 14px;min-height:46px;transition:border-color .15s}
.form-textarea,textarea{min-height:120px;resize:vertical;font-family:var(--fl);font-size:.9rem;line-height:1.5}
.form-input:focus,.form-select:focus,.form-textarea:focus,input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent)}
.form-hint{font-family:var(--fl);font-size:.74rem;color:var(--t3);margin-top:6px}
.calc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.2rem}
.form-btn,.calc-button,button.calc-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:13px 24px;
  font-family:var(--fl);font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#fff;background:var(--accent);border:0;border-radius:2px;cursor:pointer;transition:filter .15s}
.form-btn:hover,.calc-button:hover{filter:brightness(1.12)}
.form-btn-secondary{background:none;color:var(--t1);border:1px solid var(--ln2)}
.output-display,.calc-result,.result-box,.range-result{font-family:var(--fl);font-size:.86rem;line-height:1.65;color:var(--t1);white-space:pre-wrap;word-break:break-word;
  background:#0a0c0b;border:1px solid var(--ln2);border-left:2px solid var(--accent);border-radius:2px;padding:16px;margin-top:1.2rem}
.result-label{color:var(--t2);font-size:.82rem;margin-bottom:4px}
.result-value{font-size:1.05rem;font-weight:700;color:var(--accent);margin-top:6px}
.tool-form-row{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1.2rem}
.tool-form-row .form-btn{flex:0 0 auto}
.line-label{font-family:var(--fl);font-size:.72rem;color:var(--accent);margin-bottom:4px}
.tool-back{display:inline-flex;align-items:center;gap:8px;font-family:var(--fl);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--t3);margin-top:2.4rem}
.tool-back:hover{color:var(--accent)}
@media(max-width:600px){.calc-grid{grid-template-columns:1fr}}

/* ============================ search overlay ============================ */
.ref-search{position:fixed;inset:0;z-index:200;background:rgba(5,5,5,.78);backdrop-filter:blur(6px);display:flex;justify-content:center;padding:14vh 16px 16px}
.ref-search[hidden]{display:none}
.rs-box{width:100%;max-width:680px;height:max-content;max-height:74vh;display:flex;flex-direction:column;background:var(--bg-2);border:1px solid var(--ln2);box-shadow:0 30px 80px rgba(0,0,0,.7)}
.rs-head{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:1px solid var(--ln);color:var(--t3)}
.rs-head input{flex:1;background:none;border:none;color:var(--t1);font-family:var(--fb);font-size:1.05rem;outline:none}
.rs-close{font-family:var(--fl);font-size:.62rem;color:var(--t3);border:1px solid var(--ln2);background:none;padding:3px 8px;cursor:pointer}
.rs-results{overflow-y:auto;padding:6px 0}
.rs-hit{display:block;padding:12px 18px;border-bottom:1px solid var(--ln);cursor:pointer}
.rs-hit:hover,.rs-hit.sel{background:rgba(201,42,42,.1)}
.rs-hit .rs-dom{font-family:var(--fl);font-size:.58rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:4px}
.rs-hit .rs-t{font-weight:600;color:var(--t1);font-size:.95rem;margin-bottom:3px}
.rs-hit .rs-x{font-size:.82rem;color:var(--t2);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rs-empty{padding:22px 18px;text-align:center;color:var(--t3);font-family:var(--fl);font-size:.82rem}

/* ============================ footer ============================ */
.ref-foot{position:relative;z-index:1;margin-left:var(--side);padding:26px;text-align:center;font-family:var(--fl);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:var(--t3);border-top:1px solid var(--ln);display:flex;justify-content:center;gap:12px}
.ref-foot .dot{color:var(--accent)}
.ref-hub .ref-foot,.hub-main ~ .ref-foot{margin-left:0}

/* ============================ responsive ============================ */
@media(max-width:1000px){
  .ref-cols{grid-template-columns:1fr}
  .toc{display:none}
  .toc-mobile{display:block;position:sticky;top:calc(var(--hd) + 6px);z-index:30;margin:0 0 24px;background:rgba(13,15,14,.95);backdrop-filter:blur(10px);border:1px solid var(--ln2)}
  .toc-mobile summary{list-style:none;cursor:pointer;padding:12px 15px;font-family:var(--fl);font-size:.64rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);display:flex;align-items:center;justify-content:space-between}
  .toc-mobile summary::-webkit-details-marker{display:none}
  .toc-mobile summary::after{content:'▾';color:var(--t3)}
  .toc-mobile[open] summary::after{content:'▴'}
  .toc-mobile nav{max-height:60vh;overflow-y:auto;border-top:1px solid var(--ln)}
  .toc-mobile .toc-ol a{padding:9px 16px;border-left:none;color:var(--t2)}
}
@media(max-width:860px){
  .ref-menu-btn{display:flex}
  .ref-nav{transform:translateX(-100%);transition:transform .26s var(--ease);width:min(82vw,300px)}
  .ref-nav.open{transform:translateX(0)}
  .ref-nav.open ~ .nav-scrim{display:block}
  .ref-main,.ref-foot{margin-left:0}
  .ref-search-btn span{display:none}
  .ref-back span{display:none}
}
@media(max-width:600px){
  .ref-main{padding:22px 18px 90px}
  .ref-lead{font-size:.86rem}
  /* table reflow */
  .tbl-wrap{border:none}
  .tbl.reflow,.tbl.reflow tbody,.tbl.reflow tr,.tbl.reflow td{display:block;width:100%}
  .tbl.reflow thead{display:none}
  .tbl.reflow tr{background:var(--card);border:1px solid var(--ln);margin-bottom:12px;padding:5px 4px}
  .tbl.reflow td{display:flex;justify-content:space-between;gap:16px;border-bottom:1px solid var(--ln);padding:9px 14px;white-space:normal}
  .tbl.reflow tr td:last-child{border-bottom:none}
  .tbl.reflow td::before{content:attr(data-label);font-family:var(--fl);font-size:.58rem;letter-spacing:.05em;text-transform:uppercase;color:var(--t3);flex:0 0 42%}
  .tbl.reflow td:first-child{color:var(--accent);font-weight:600}
}