/* Back-end "engine room" ---------------------------------------------------------- */
body.backend{--amb-a:rgba(44,227,255,.2);--amb-b:rgba(91,59,255,.3)}
.be{max-width:1500px;margin:0 auto;padding:22px 20px 40px;display:flex;flex-direction:column;gap:16px}
.be-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:24px;align-items:end;padding:8px 2px 4px}
.be-intro h1{margin:14px 0 10px;font-size:clamp(28px,3.4vw,44px);line-height:1.1;letter-spacing:-.02em;text-wrap:balance}
.be-intro p{margin:0 0 12px;color:var(--ink2);font-size:15px;line-height:1.7;max-width:620px}
.be-intro p b{color:var(--ink);font-weight:600}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;border-radius:var(--r);overflow:hidden;background:var(--line);border:1px solid var(--line)}
.stat{background:rgba(10,16,30,.92);padding:13px 14px}
.stat span{display:block;font-size:11px;color:var(--ink3);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stat b{display:block;margin-top:5px;font:800 21px/1.1 var(--mono);white-space:nowrap}
.stat b small{font-size:11px;color:var(--ink3);font-weight:600;margin-left:3px}
.stat.ok b{color:var(--ok)} .stat.cy b{color:var(--cyan)} .stat.sp b{color:var(--spark)}

/* architecture */
.alg{display:inline-flex;align-items:center;gap:6px;font:600 11px/1 var(--mono);color:var(--ink3);margin-left:12px}
.alg i{width:8px;height:8px;border-radius:50%}
.k-http{background:#ffcf5c;box-shadow:0 0 8px #ffcf5c}.k-ws{background:var(--cyan);box-shadow:0 0 8px var(--cyan)}.k-ble{background:var(--nest2);box-shadow:0 0 8px var(--nest2)}
.arch-wrap{padding:6px 12px 0;overflow-x:auto}
#arch{width:100%;min-width:760px;height:auto}
#arch .node rect.box{fill:rgba(12,20,38,.95);stroke:rgba(122,162,255,.3);stroke-width:1.2}
#arch .node.hot rect.box{stroke:rgba(44,227,255,.7)}
#arch .node .ttl{font:700 16px var(--sans);fill:#e9eefb}
#arch .node .sub{font:500 11.5px var(--mono);fill:#8b98b4}
#arch .node .ico{color:#2ce3ff}
#arch .node .cnt{font:700 11px var(--mono);fill:#ffd21f}
#arch .edge{fill:none;stroke:rgba(122,162,255,.28);stroke-width:1.6}
#arch .edge.plan{stroke-dasharray:6 6;stroke:rgba(122,162,255,.22)}
#arch .elab{font:600 11px var(--mono);fill:#8b98b4}
#arch .erate{font:700 11px var(--mono);fill:#ffd21f}
#arch .pk{filter:drop-shadow(0 0 4px currentColor)}
.arch-foot{margin:0;padding:6px 18px 16px;font-size:12.5px;line-height:1.6}
.arch-foot b{color:var(--ink2);font-weight:600}

.be-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,1fr);gap:16px}

/* REST explorer */
.api-panel{display:flex;flex-direction:column;min-height:560px}
.api-body{flex:1;display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.25fr);min-height:0;margin-top:12px;border-top:1px solid var(--line)}
.eps{list-style:none;margin:0;padding:8px;border-right:1px solid var(--line);max-height:600px}
.ep{display:flex;flex-direction:column;gap:5px;width:100%;padding:9px 10px;border-radius:9px;text-align:left;border:1px solid transparent;transition:background .15s}
.ep:hover{background:rgba(255,255,255,.035)}
.ep.on{background:rgba(91,59,255,.14);border-color:rgba(142,124,255,.4)}
.ep .l1{display:flex;align-items:center;gap:8px;min-width:0}
.ep code{font:600 12px/1.2 var(--mono);color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ep small{font-size:11.5px;color:var(--ink3);line-height:1.35}
.ep .lock{width:12px;height:12px;color:var(--ink4);flex:none}
.req{display:flex;flex-direction:column;gap:10px;padding:12px 14px 14px;min-width:0}
.req-line{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:9px;background:rgba(0,0,0,.25);border:1px solid var(--line);min-width:0}
.rq-path{font-size:12.5px;white-space:nowrap;overflow-x:auto;scrollbar-width:none}
.rq-path .pv{color:var(--spark)}
.rq-params{display:flex;flex-wrap:wrap;gap:8px}
.rq-params label{display:flex;flex-direction:column;gap:4px;font-size:11px;color:var(--ink3);font-weight:600;min-width:120px;flex:1}
.rq-params select,.rq-params input{height:34px;padding:0 10px;border-radius:8px;border:1px solid var(--line2);background:#0b1222;font-size:12.5px;color:var(--ink)}
.rq-body span{display:block;font-size:11px;color:var(--ink3);font-weight:600;margin-bottom:4px}
.rq-body textarea{width:100%;padding:9px 10px;border-radius:8px;border:1px solid var(--line2);background:#0b1222;font:12px/1.5 var(--mono);color:#c9d4ec;resize:vertical}
.rq-params select:focus,.rq-params input:focus,.rq-body textarea:focus{outline:none;border-color:var(--nest2)}
.rq-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tog{display:inline-flex;align-items:center;gap:8px;cursor:pointer;min-width:0}
.tog input{position:absolute;opacity:0;pointer-events:none}
.tog span{flex:none;position:relative;width:32px;height:18px;border-radius:18px;background:rgba(255,255,255,.12);transition:background .2s}
.tog span::after{content:"";position:absolute;left:2px;top:2px;width:14px;height:14px;border-radius:50%;background:#fff;transition:transform .2s var(--ease)}
.tog input:checked+span{background:var(--ok)}
.tog input:checked+span::after{transform:translateX(14px)}
.tog input:focus-visible+span{outline:2px solid var(--cyan);outline-offset:2px}
.tog b{font-size:11.5px;font-weight:600;color:var(--ink2)}
.tog small{font-size:10.5px;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.res{display:flex;flex-direction:column;flex:1;min-height:220px;border-radius:10px;border:1px solid var(--line);background:rgba(0,0,0,.28);overflow:hidden}
.res-h{display:flex;align-items:center;gap:10px;padding:8px 10px;border-bottom:1px solid var(--line)}
.res .code{font:800 12px/1 var(--mono);padding:4px 8px;border-radius:6px;background:rgba(255,255,255,.06);color:var(--ink3)}
.res .code.c2{background:rgba(34,211,122,.14);color:#4be39a}.res .code.c4{background:rgba(255,194,61,.15);color:#ffcf5c}.res .code.c5{background:rgba(255,77,94,.15);color:#ff8a95}
#rs-meta{font-size:11px}
#rs-body{flex:1;margin:0;padding:10px 12px;max-height:300px;min-height:120px}
.curl{padding:8px 12px;border-top:1px solid var(--line);font-size:10.5px;color:var(--ink3);white-space:nowrap;overflow-x:auto;scrollbar-width:thin}
.icon-btn{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;border:1px solid var(--line);color:var(--ink2)}
.icon-btn:hover{border-color:var(--line3);color:var(--ink)}
.icon-btn svg{width:15px;height:15px}
.icon-btn.on{background:rgba(255,210,31,.14);border-color:rgba(255,210,31,.5);color:var(--spark)}

/* WS stream */
.ws-panel{display:flex;flex-direction:column;min-height:560px;min-width:0}
.ws-subs{display:flex;flex-wrap:wrap;gap:6px;padding:12px 16px 0}
.ws-subs .lbl{font-size:11px;color:var(--ink3);font-weight:600;align-self:center;margin-right:4px}
.sub-chip{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 9px;border-radius:7px;border:1px solid var(--line);font-size:11.5px;font-weight:600;color:var(--ink3)}
.sub-chip i{width:6px;height:6px;border-radius:50%;background:var(--ink4)}
.sub-chip.on{border-color:rgba(44,227,255,.5);color:var(--ink);background:rgba(44,227,255,.08)}
.sub-chip.on i{background:var(--cyan);box-shadow:0 0 6px var(--cyan)}
.sub-chip:disabled{opacity:.4}
.ws-bar{display:flex;align-items:center;gap:8px;padding:10px 16px}
.ws-filters{display:flex;flex-wrap:wrap;gap:5px}
.ws-filters button{height:26px;padding:0 9px;border-radius:7px;font:600 11px/1 var(--mono);color:var(--ink3);border:1px solid var(--line)}
.ws-filters button.on{color:var(--ink);background:rgba(255,255,255,.08);border-color:var(--line3)}
.ws-head,.fr .row{display:grid;grid-template-columns:92px 22px minmax(0,1fr) 88px 52px;gap:8px;align-items:center}
.ws-head{padding:6px 16px;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink4);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stream{list-style:none;margin:0;padding:4px 8px 10px;flex:1;min-height:0;max-height:520px}
.fr{border-radius:7px}
.fr .row{width:100%;padding:5px 8px;text-align:left;font:500 11.5px/1.3 var(--mono);color:var(--ink2);border-radius:7px}
.fr .row:hover{background:rgba(255,255,255,.035)}
.fr.new{animation:frIn .5s var(--ease)}
@keyframes frIn{from{background:rgba(44,227,255,.12)}}
.fr .dir{font-weight:800;text-align:center}
.fr .dir.up{color:#ffcf5c}.fr .dir.down{color:var(--cyan)}
.fr .ev{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--ink)}
.fr .ev em{font-style:normal;color:var(--ink3);margin-left:6px}
.fr .src{font-size:10px;padding:2px 6px;border-radius:5px;background:rgba(255,255,255,.05);color:var(--ink3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;text-align:center}
.fr .src.console{background:rgba(255,210,31,.12);color:var(--spark)}
.fr .src.ble{background:rgba(142,124,255,.16);color:var(--nest2)}
.fr .sz{text-align:right;color:var(--ink4)}
.fr .k-http{background:none;box-shadow:none;color:#ffcf5c}.fr .k-ble{background:none;box-shadow:none;color:var(--nest2)}
.fr pre{margin:2px 8px 8px 30px;padding:8px 10px;border-radius:8px;background:rgba(0,0,0,.3);border:1px solid var(--line);max-height:240px;overflow:auto}
.stream .empty{padding:30px 10px;text-align:center;color:var(--ink4);font-size:12.5px}

/* ER */
.pnote{margin:8px 16px 0;font-size:12.5px;color:var(--ink3);line-height:1.6}
.er{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;padding:14px 16px 16px}
.ent{border-radius:11px;border:1px solid var(--line2);background:rgba(10,16,30,.85);overflow:hidden;transition:border-color .2s,transform .2s var(--ease)}
.ent:hover,.ent.hl{border-color:rgba(44,227,255,.6);transform:translateY(-1px)}
.ent h4{margin:0;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 12px;font:700 13px/1 var(--mono);background:rgba(91,59,255,.14);border-bottom:1px solid var(--line)}
.ent h4 small{font:600 10px/1 var(--mono);color:var(--ink3)}
.ent ul{list-style:none;margin:0;padding:6px 0}
.ent li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;padding:3px 12px;font:500 11.5px/1.45 var(--mono)}
.ent li span{color:var(--ink2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ent li em{font-style:normal;color:var(--ink4);font-size:10.5px}
.ent li.pk span{color:var(--spark)} .ent li.fk span{color:var(--cyan)}
.ent .rel{display:flex;flex-wrap:wrap;gap:5px;padding:8px 12px 10px;border-top:1px solid var(--line)}
.ent .rel button{font:600 10.5px/1 var(--mono);padding:4px 7px;border-radius:5px;background:rgba(44,227,255,.08);color:var(--cyan)}
.ent.enum h4{background:rgba(255,210,31,.1)}
.ent.enum li span{color:var(--ink2)}

/* BLE lab */
.bl-body{padding:12px 16px 16px;display:flex;flex-direction:column;gap:14px}
.bl-sec h5{margin:0 0 8px;display:flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700}
.bl-sec h5 small{font:500 11px/1 var(--mono);color:var(--ink3)}
.ribbon{display:grid;gap:4px;grid-template-columns:repeat(var(--n),minmax(0,1fr))}
.byte{position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;padding:7px 0 6px;border-radius:7px;background:rgba(255,255,255,.03);border:1px solid var(--line);min-width:0}
.byte b{font:700 13px/1 var(--mono);color:var(--ink)}
.byte span{font:600 8.5px/1.1 var(--mono);color:var(--ink4);text-align:center;letter-spacing:-.01em;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding:0 2px}
.byte.hd{background:rgba(255,210,31,.08);border-color:rgba(255,210,31,.35)}.byte.hd b{color:var(--spark)}
.byte.fn{background:rgba(91,59,255,.2);border-color:rgba(142,124,255,.6)}.byte.fn b{color:#c4baff}
.byte.val{background:rgba(44,227,255,.08);border-color:rgba(44,227,255,.4)}.byte.val b{color:var(--cyan)}
.byte.crc b{color:var(--ink3)}
.byte.flash{animation:flash .6s var(--ease)}
@keyframes flash{from{background:rgba(255,255,255,.25)}}
.fn-btns{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.fn-btns button{height:28px;padding:0 9px;border-radius:7px;border:1px solid var(--line);font:600 11px/1 var(--mono);color:var(--ink2)}
.fn-btns button:hover{border-color:var(--line3);color:var(--ink)}
.fn-btns button.on{background:rgba(91,59,255,.28);border-color:rgba(142,124,255,.6);color:#fff}
.dec{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;margin-top:10px}
.dec div{padding:7px 9px;border-radius:8px;background:rgba(255,255,255,.03);border:1px solid var(--line);min-width:0}
.dec span{display:block;font-size:10.5px;color:var(--ink3)}
.dec b{display:block;margin-top:2px;font-size:12.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bl-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.bl-row .grow{flex:1}
.csv{font:13px/1.6 var(--mono);padding:10px 12px;border-radius:9px;background:rgba(0,0,0,.3);border:1px solid var(--line);word-break:break-all}
.csv i{font-style:normal;padding:1px 3px;border-radius:4px}
.formula{font:12px/1.7 var(--mono);color:var(--ink2);padding:10px 12px;border-radius:9px;border:1px dashed var(--line2)}
.formula b{color:var(--spark);font-weight:600}
.warnbtn.on{background:rgba(255,77,94,.15)!important;border-color:rgba(255,77,94,.55)!important;color:#ff8a95!important}

/* code map */
.cmap{padding:10px 16px 4px}
.cmap table{width:100%;border-collapse:collapse;font-size:13px;min-width:720px}
.cmap th{text-align:left;font:700 10.5px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink4);padding:10px 10px;border-bottom:1px solid var(--line)}
.cmap td{padding:11px 10px;border-bottom:1px solid rgba(122,162,255,.07);vertical-align:top;color:var(--ink2);line-height:1.5}
.cmap td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
.cmap td code{font:500 11.5px/1.5 var(--mono);color:var(--cyan);word-break:break-all}
.cmap td .same{color:var(--ok)} .cmap td .diff{color:var(--spark)}
.stack{display:flex;flex-wrap:wrap;gap:6px;padding:12px 16px 16px}
.foot{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:18px 4px 0;border-top:1px solid var(--line);color:var(--ink3);font-size:12.5px}
.foot img{height:22px;width:auto}
.foot .grow{flex:1}

@media (max-width:1180px){
  .be-hero{grid-template-columns:1fr}
  .be-grid{grid-template-columns:1fr}
}
@media (max-width:760px){
  .be{padding:14px 12px 30px;gap:12px}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .api-body{grid-template-columns:1fr}
  .eps{border-right:0;border-bottom:1px solid var(--line);max-height:230px}
  .ws-head,.fr .row{grid-template-columns:70px 16px minmax(0,1fr) 62px}
  .ws-head span:last-child,.fr .sz{display:none}
  .fr .row{font-size:11px}
  .fr pre{margin-left:8px}
  .dec{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ribbon{grid-template-columns:repeat(var(--m,6),minmax(0,1fr))}
  .alg{display:none}
  .arch-wrap{padding:6px 0 0}
}

.stats{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.1);box-shadow:var(--glass-hi),var(--glass-drop);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur)}
.stat{background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.01)),rgba(10,16,32,.5)}
.ent,.req-line,.res,.byte,.dec div,.fn-btns button,.sub-chip,.ws-filters button,.icon-btn,.rq-params select,.rq-params input,.rq-body textarea{background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.015));border-color:rgba(255,255,255,.1);box-shadow:inset 0 1px 0 rgba(255,255,255,.07)}
.rq-params select option{background:#0b1222}
.ent h4{background:linear-gradient(180deg,rgba(142,124,255,.26),rgba(91,59,255,.08))}
.ent.enum h4{background:linear-gradient(180deg,rgba(255,210,31,.18),rgba(255,210,31,.04))}