/* Flight Club Saar · Bau deine Drohne (Werkbank) */
.bk-head{min-height:min(48svh,480px)}
.bk-head-mat{position:absolute;inset:0;background:
  linear-gradient(180deg,rgba(4,9,18,.2),var(--night) 92%),
  repeating-linear-gradient(0deg,rgba(63,224,255,.08) 0 1px,transparent 1px 24px),
  repeating-linear-gradient(90deg,rgba(63,224,255,.08) 0 1px,transparent 1px 24px),
  radial-gradient(120% 90% at 70% 10%,#0e2c55,#040912 70%)}
.bk-head-mat::after{content:"";position:absolute;inset:0;background:
  repeating-linear-gradient(0deg,rgba(63,224,255,.16) 0 1px,transparent 1px 96px),
  repeating-linear-gradient(90deg,rgba(63,224,255,.16) 0 1px,transparent 1px 96px);mask-image:radial-gradient(80% 70% at 60% 30%,#000,transparent)}
.bk-head-in{position:relative}
.bk-head .lede{max-width:62ch}

.bk{padding:12px 0 36px}
.bk-app{max-width:1680px;margin:0 auto;padding-inline:clamp(10px,2.4vw,40px);display:grid;grid-template-columns:minmax(0,1fr) 420px;grid-template-rows:auto auto;gap:14px}
.bk-stagecol{display:grid;grid-template-rows:auto minmax(0,1fr);gap:8px;min-width:0}
.bk-stage{position:relative;height:min(calc(100svh - 246px),720px);min-height:420px;border-radius:var(--r);border:1px solid var(--line-hi);background:radial-gradient(90% 80% at 50% 35%,#0c2244,#050c18 75%);overflow:hidden;touch-action:pan-y}
.bk-cv{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:grab}
.bk-cv:active{cursor:grabbing}
.bk-solder[hidden]{display:none}
.bk-solder{position:absolute;inset:0;width:100%;height:100%;background:radial-gradient(80% 80% at 50% 45%,#0b1d3a,#050c18 80%)}
.bk-tools{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.bk-tname{margin:0;display:flex;align-items:center;gap:10px;min-width:0;font:600 13px/1.2 var(--hud);letter-spacing:.08em;text-transform:uppercase;color:var(--osd)}
.bk-tname span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bk-tname b{flex:none;padding:5px 9px;border-radius:7px;background:rgba(255,176,32,.12);color:var(--amber);font-weight:600}
.bk-views{display:flex;flex:none;gap:4px;padding:4px;border-radius:999px;background:rgba(2,6,14,.7);border:1px solid var(--line)}
.bk-views button{min-height:36px;padding:0 14px;border-radius:999px;border:0;background:none;color:var(--mute);font:600 12px/1 var(--hud);letter-spacing:.1em;text-transform:uppercase;cursor:pointer}
.bk-views button.on{background:var(--sig);color:var(--night)}
.bk-views button:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.bk-hint{position:absolute;left:12px;bottom:12px;transition:opacity .5s;margin:0;display:flex;gap:8px;align-items:center;padding:7px 12px;border-radius:999px;background:rgba(2,6,14,.6);font:500 13px/1.2 var(--body);color:var(--osd);pointer-events:none;white-space:nowrap;max-width:calc(100% - 24px);overflow:hidden;text-overflow:ellipsis}
.bk-hint.gone{opacity:0}
.bk-hint .dot{width:7px;height:7px;border-radius:50%;background:var(--amber);flex:none;animation:bkPulse 1.6s ease-in-out infinite}
@keyframes bkPulse{50%{opacity:.3}}
.bk-fly{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);width:min(520px,calc(100% - 24px));padding:14px 16px;border-radius:16px;background:rgba(4,12,26,.82);border:1px solid var(--line-hi);text-align:center}
.bk-fly-t{margin:0 0 10px;font-size:15px}
.bk-fly .btns{justify-content:center}
.bk-nogl{pointer-events:none;position:absolute;inset:auto 16px 60px;margin:0;padding:12px 14px;border-radius:12px;background:rgba(4,12,26,.85);border:1px solid var(--line-hi)}

.bk-panel{display:flex;flex-direction:column;min-height:0;height:min(calc(100svh - 190px),770px);min-height:470px;border-radius:var(--r);border:1px solid var(--line-hi);background:linear-gradient(180deg,#0d1f3d,#071225)}
.bk-steps{display:flex;gap:4px;overflow-x:auto;padding:10px;border-bottom:1px solid var(--line);scrollbar-width:thin;scrollbar-color:var(--line-hi) transparent;flex:none}
.bk-steps button{flex:none;display:flex;align-items:center;gap:7px;min-height:38px;padding:0 11px 0 6px;border-radius:999px;border:1px solid transparent;background:none;color:var(--mute);font:600 12px/1 var(--hud);letter-spacing:.06em;cursor:pointer;white-space:nowrap}
.bk-steps b{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;border:1px solid var(--line-hi);font-size:11px}
.bk-steps .done b{background:rgba(62,224,138,.16);border-color:var(--green);color:var(--green)}
.bk-steps .now{border-color:var(--sig);color:var(--osd)}
.bk-steps .now b{background:var(--sig);border-color:var(--sig);color:var(--night)}
.bk-steps button:focus-visible{outline:2px solid var(--amber);outline-offset:1px}
.bk-body{flex:1;min-height:0;overflow-y:auto;padding:16px 16px 8px;scrollbar-width:thin;scrollbar-color:var(--line-hi) transparent}
.bk-h{font:400 clamp(30px,3vw,40px)/1 var(--big);letter-spacing:.02em;margin:0 0 8px}
.bk-h4{font:600 13px/1.2 var(--hud);letter-spacing:.1em;text-transform:uppercase;color:var(--mute);margin:18px 0 8px}
.bk-p{margin:0 0 14px;color:var(--mute);font-size:15px;line-height:1.5;max-width:60ch}
.bk-empty{margin:8px 0;padding:12px 14px;border-radius:12px;border:1px dashed var(--line-hi);color:var(--osd)}
.bk-nav{display:flex;justify-content:space-between;gap:8px;padding:10px 12px;border-top:1px solid var(--line);flex:none}
.bk-nav .btn{min-height:44px}

.bk-klassen{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.bk-kl{display:grid;gap:4px;justify-items:start;text-align:left;padding:12px;border-radius:14px;border:1px solid var(--line-hi);background:rgba(4,12,28,.5);color:var(--osd);cursor:pointer;transition:border-color .25s,background .25s,transform .25s}
.bk-kl svg{width:100%;height:auto;fill:none;stroke:var(--mute);stroke-width:1.6}
.bk-kl svg .p{stroke:var(--sig);stroke-dasharray:3 3}
.bk-kl b{font:600 15px/1.2 var(--hud)}
.bk-kl small{color:var(--mute);font-size:13px}
.bk-kl:hover{border-color:var(--sig)}
.bk-kl.on{border-color:var(--amber);background:rgba(255,176,32,.08)}
.bk-kl.on svg .p{stroke:var(--amber)}
.bk-kl:focus-visible,.bk-opt-b:focus-visible,.bk-q:focus-visible,.bk-set-b:focus-visible{outline:2px solid var(--amber);outline-offset:2px}

.bk-opts{display:grid;gap:6px}
.bk-opt{border-radius:12px;border:1px solid var(--line);background:rgba(4,12,28,.45);transition:border-color .2s,background .2s}
.bk-opt-b{display:grid;grid-template-columns:36px minmax(0,1fr) auto;align-items:center;gap:10px;width:100%;padding:10px;border:0;border-radius:12px;background:none;color:var(--osd);text-align:left;cursor:pointer;font:inherit}
.bk-opt:hover{border-color:var(--line-hi);background:rgba(16,36,74,.6)}
.bk-opt.on{border-color:var(--sig);background:rgba(63,224,255,.08);box-shadow:0 6px 20px -12px rgba(63,224,255,.6)}
.bk-opt-ic svg{width:32px;height:32px;fill:none;stroke:var(--sig);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.bk-opt-t{min-width:0;display:grid;gap:2px}
.bk-opt-t b{font:600 14.5px/1.25 var(--body)}
.bk-opt-t small{color:var(--mute);font-size:12.5px;line-height:1.35}
.bk-fit{display:inline-flex;align-items:center;gap:6px;font:600 11px/1 var(--hud);letter-spacing:.06em;text-transform:uppercase;color:var(--mute);white-space:nowrap}
.bk-fit i{width:8px;height:8px;border-radius:50%;background:var(--green)}
.f-warn .bk-fit i{background:var(--amber)} .f-warn .bk-fit{color:#ffd690}
.f-bad .bk-fit i{background:var(--red)} .f-bad .bk-fit{color:#ffb3bb}
.bk-opt.f-bad:not(.on){opacity:.8}
.bk-kv{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:12px 0 0}
.bk-kv>span{font:600 12px/1 var(--hud);letter-spacing:.1em;text-transform:uppercase;color:var(--mute);margin-right:4px}
.chip-b{min-height:36px;padding:0 13px;border-radius:999px;border:1px solid var(--line-hi);background:none;color:var(--osd);font:600 13px/1 var(--hud);cursor:pointer}
.chip-b.on{background:var(--sig);border-color:var(--sig);color:var(--night)}

.bk-uarts{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 12px}
.bk-uarts span{padding:6px 10px;border-radius:999px;border:1px solid var(--line-hi);font-size:13px}
.bk-uarts b{font:600 12px/1 var(--hud);color:var(--sig);margin-right:4px}
.bk-sol{list-style:none;margin:0 0 12px;padding:0;display:grid;gap:6px}
.bk-sol button{display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;align-items:start;width:100%;padding:10px;border-radius:12px;border:1px solid var(--line);background:rgba(4,12,28,.45);color:var(--osd);text-align:left;font-size:14px;line-height:1.45;cursor:pointer}
.bk-sol button>b{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;border:1px solid var(--line-hi);font:700 12px/1 var(--hud)}
.bk-sol button.on{border-color:var(--amber);background:rgba(255,176,32,.08)}
.bk-sol button.on>b{background:var(--amber);border-color:var(--amber);color:var(--night)}
.bk-sol code{font:600 12.5px/1 var(--hud);color:var(--amber);background:rgba(255,176,32,.1);padding:2px 5px;border-radius:5px}
.bk-share{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}

.bk-bar{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,minmax(0,1fr)) auto auto;gap:10px;align-items:center;padding:10px 12px;border-radius:var(--r);border:1px solid var(--line-hi);background:linear-gradient(180deg,#0b1a33,#071225)}
.bk-m{display:grid;gap:4px;min-width:0}
.bk-m span{font:600 11px/1.1 var(--hud);letter-spacing:.1em;text-transform:uppercase;color:var(--mute)}
.bk-m b{font:400 clamp(24px,2.4vw,34px)/1 var(--big);letter-spacing:.02em;font-variant-numeric:tabular-nums;white-space:nowrap}
.bk-check{display:flex;align-items:center;gap:8px;min-height:44px;padding:0 14px;border-radius:999px;border:1px solid var(--line-hi);background:none;color:var(--osd);font:600 13px/1 var(--hud);cursor:pointer;white-space:nowrap}
.bk-check i{width:12px;height:12px;border-radius:50%;background:var(--line-hi)}
.bk-check i.ok{background:var(--green);box-shadow:0 0 12px var(--green)} .bk-check i.warn{background:var(--amber);box-shadow:0 0 12px var(--amber)} .bk-check i.bad{background:var(--red);box-shadow:0 0 12px var(--red)}
.bk-go{min-height:44px;white-space:nowrap}
.bk-go:disabled{opacity:.55;cursor:not-allowed}
.bk-checks{grid-column:1/-1;padding:12px 14px;border-radius:var(--r);border:1px solid var(--line-hi);background:#071225}
.bk-cl{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.bk-cl li{display:grid;gap:3px;padding:10px 12px 10px 30px;border-radius:12px;background:rgba(4,12,28,.6);position:relative;font-size:14px;line-height:1.45}
.bk-cl li::before{content:"";position:absolute;left:12px;top:15px;width:9px;height:9px;border-radius:50%;background:var(--green)}
.bk-cl li.f-warn::before{background:var(--amber)} .bk-cl li.f-bad::before{background:var(--red)}
.bk-cl b{font-weight:600}
.bk-cl span{color:var(--mute)}

/* Lötplan */
.sv-pcb{fill:#0a1a33;stroke:#2a5a9a;stroke-width:3}
.sv-trace{fill:none;stroke:rgba(80,140,200,.28);stroke-width:3}
.sv-hole{fill:#050c18;stroke:#d9b44a;stroke-width:6}
.sv-mcu{fill:#05080e;stroke:#3a4558;stroke-width:2}
.sv-pad{fill:#b8963c;stroke:#e8c66a;stroke-width:1.5}
.sv-pad.on{fill:var(--amber);filter:drop-shadow(0 0 10px #ffb020)}
.sv-t{fill:var(--osd);font:600 22px/1 "Chakra Petch",monospace;letter-spacing:.04em}
.sv-t.sm{font-size:17px} .sv-t.big{font-size:30px} .sv-t.dim{fill:var(--mute)} .sv-t.amber{fill:var(--amber)}
.sv-t.pad{font-size:15px;fill:#e8d39a} .sv-t.pad.on{fill:#fff;font-weight:700}
.sv-box{fill:#0d1f3d;stroke:var(--line-hi);stroke-width:2}
.sv-part.on .sv-box{stroke:var(--amber);stroke-width:3}
.sv-w{fill:none;stroke-width:4;stroke-linecap:round;opacity:.28}
.sv-w.on{opacity:1;stroke-width:5}
.w-v{stroke:#ff4b5c} .w-g{stroke:#8a95a5} .w-tx{stroke:#ffb020} .w-rx{stroke:#3fe0ff} .w-vid{stroke:#f5f5f5} .w-plug{stroke:#3ee08a;stroke-dasharray:10 8}
.sv-dot{fill:none;stroke:#fff;stroke-width:3;animation:svDot 1.2s ease-out infinite;transform-box:fill-box;transform-origin:center}
@keyframes svDot{from{transform:scale(.6);opacity:1}to{transform:scale(2.2);opacity:0}}

.bk-more{padding-top:clamp(40px,6vw,80px)}
.bk-tips{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 40px;margin-top:18px;max-width:1100px}
.bk-tips p{margin:0;color:var(--mute);line-height:1.55}
.bk-tips b{color:var(--osd)}
.bk-tips a{color:var(--sig)}
.bk-src{margin-top:24px;max-width:80ch}
.bk-src a{color:var(--sig)}
.bk-srclist ul{columns:2 320px;font-size:13px;color:var(--mute);padding-left:18px}
.bk-srclist a{color:var(--sig);word-break:break-all}

@media (max-width:1100px){
  .bk-app{grid-template-columns:minmax(0,1fr)}
  .bk-stage{height:50svh;min-height:300px}
  .bk-panel{height:auto;min-height:0}
  .bk-body{overflow:visible}
  .bk-bar{grid-template-columns:repeat(2,minmax(0,1fr));position:sticky;bottom:8px;z-index:3}
  .bk-check,.bk-go{grid-column:span 1}
}
@media (max-width:560px){
  .bk-stage{height:44svh;min-height:280px}
  .bk-qs{grid-template-columns:minmax(0,1fr)}
  .bk-kvs{padding-left:10px}
  .bk-tname{font-size:11px}
  .bk-bar{grid-template-columns:repeat(3,minmax(0,1fr)) auto;gap:6px;padding:8px 10px}
  .bk-bar .bk-m-hov,.bk-bar .bk-go{display:none}
  .bk-check{min-height:44px;padding:4px 10px;font-size:11px;gap:6px;white-space:normal;max-width:118px;line-height:1.15;text-align:left}
  .bk-check i{width:14px;height:14px}
  .bk-panel button{scroll-margin-bottom:90px}
  .bk-klassen{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .bk-tips{grid-template-columns:minmax(0,1fr)}
  .bk-bar{gap:8px;padding:8px}
  .bk-m b{font-size:22px}
  .bk-m span{font-size:10px}
  .bk-hint{font-size:12px}
  .bk-views button{padding:0 10px;font-size:11px}
}
@media (prefers-reduced-motion:reduce){.bk-hint .dot,.sv-dot{animation:none}}

.bk-panel button{scroll-margin-bottom:24px}
.sv-plug{fill:#f2f2f2;stroke:#3ee08a;stroke-width:2}.sv-plug.on{filter:drop-shadow(0 0 10px #3ee08a)}
.bk-solder[hidden],.bk-nav [hidden],.bk-fly[hidden],.bk-nogl[hidden],.bk-checks[hidden],.bk-srclist[hidden]{display:none!important}
.bk-sol button>b{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;border:1px solid var(--line-hi);font:700 12px/1 var(--hud)}
.bk-sol button span b{display:inline;width:auto;height:auto;border:0;font:600 14px/1.45 var(--body);color:var(--osd)}
.bk-sol button.on>b{background:var(--amber);border-color:var(--amber);color:var(--night)}
.bk-opt,.bk-sol button,.bk-kl{scroll-margin-bottom:140px}
.sv-esc{fill:#0a1a33;stroke:#2a7a9a;stroke-width:3}
.sv-big{fill:#c8a14a;stroke:#f0d07a;stroke-width:2}
.sv-big.on{fill:var(--amber);filter:drop-shadow(0 0 12px #ffb020)}
.sv-conn{fill:#e8e8e8;stroke:#999;stroke-width:2}
.sv-conn.on{fill:var(--green);filter:drop-shadow(0 0 10px #3ee08a)}
/* Anschlussplan im Herstellerstil */
.bk-solder{transition:transform .9s cubic-bezier(.2,.7,.2,1);transform-origin:50% 60%}
.bk-solder.tilt{animation:plTilt 1.1s cubic-bezier(.2,.7,.2,1)}
@keyframes plTilt{from{transform:perspective(1400px) rotateX(18deg) scale(.96)}to{transform:none}}
.pl-pcb{stroke:#3a404c;stroke-width:3}
.pl-board.flip{animation:plFlip .8s ease-out;transform-box:fill-box;transform-origin:center}
@keyframes plFlip{0%{transform:scaleX(-1)}50%{transform:scaleX(0)}100%{transform:scaleX(1)}}
.pl-ring{fill:#c99a3a} .pl-hole{fill:#050c18}
.pl-usb{fill:#c8ced8;stroke:#8d95a3;stroke-width:2} .pl-usb-in{fill:#5c6370}
.pl-arrow{fill:#eaf4ff}
.pl-ant{fill:none;stroke:#c99a3a;stroke-width:6}
.pl-jmp{fill:#c99a3a;stroke:#0a0c10;stroke-width:2}
.pl-chip{fill:#07090d;stroke:#30353f;stroke-width:2}
.pl-pad{fill:#c9a23f;stroke:#f0d27a;stroke-width:1.2}
.pl-pad.done{fill:#e2bd55}
.pl-pad.on{fill:var(--amber);filter:url(#svg-glow)}
.pl-blob{fill:#dfe5ee;opacity:.9}
.pl-blob.fresh{animation:plBlob .7s .9s both cubic-bezier(.3,1.6,.5,1)}
@keyframes plBlob{from{r:0;opacity:0}to{opacity:.95}}
.pl-lab{fill:#e8eef6;font:700 14px/1 "Chakra Petch",monospace;letter-spacing:.03em}
.pl-lab.in{font-size:12px;fill:#b9c4d3}
.pl-lab.on{fill:var(--amber)}
.pl-sock{fill:#f2f2f2;stroke:#9aa1ac;stroke-width:2} .pl-sock.on{filter:url(#svg-glow)} .pl-pin{fill:#c9a23f}
.pl-comp{transition:opacity .4s} .pl-comp.wait{opacity:.35} .pl-comp.on .pl-cname{fill:var(--amber)}
.pl-cname{fill:#eaf4ff;font:700 15px/1 "Chakra Petch",monospace;letter-spacing:.04em}
.pl-pcb2{fill:#1b2029;stroke:#3a404c;stroke-width:2}
.pl-gold{fill:#c9a23f}
.pl-gpsb{fill:#d9dde3;stroke:#9aa1ac;stroke-width:2}
.pl-cam{fill:#ff8a1a;stroke:#b85a00;stroke-width:2} .pl-lens{fill:#111} .pl-glass{fill:#13385a}
.pl-shield{fill:#cfd5de}
.pl-lolli{fill:#3fe0ff;opacity:.85}
.pl-antw{fill:none;stroke:#111;stroke-width:5;stroke-linecap:round}
.pl-au{fill:#b8bec8;stroke:#7d8592;stroke-width:2} .pl-fin{fill:#9aa1ac}
.pl-led{fill:#3fe0ff;animation:plLed 2s linear infinite}
@keyframes plLed{0%{fill:#ff4b5c}33%{fill:#3ee08a}66%{fill:#3fe0ff}100%{fill:#ff4b5c}}
.pl-bz{fill:#15181f;stroke:#3a404c;stroke-width:3}
.pl-tag{stroke:rgba(0,0,0,.35);stroke-width:1}
.pl-tagt{fill:#0a0c10;font:700 11px/1 "Chakra Petch",monospace}
.pl-w{fill:none;stroke-width:3.2;stroke-linejoin:round;stroke-linecap:round;opacity:.85}
.pl-w.on{stroke-width:4.5;opacity:1;filter:url(#svg-glow)}
.bk-solder{background:radial-gradient(80% 80% at 50% 45%,#f4f7fb,#dfe6ef 85%)}
.bk-app.is-solder .bk-osd span,.bk-app.is-solder .bk-hint{background:rgba(4,12,26,.82)}
@media (prefers-reduced-motion:reduce){.bk-solder.tilt,.pl-board.flip,.pl-led,.pl-blob.fresh{animation:none}}
/* realistischer: Gold, Zinn, Kabel mit Isolierung */
.pl-pad{fill:url(#svg-gold);stroke:#6e4f12;stroke-width:1}
.pl-pad.done{fill:url(#svg-gold)}
.pl-blob{fill:url(#svg-tin);opacity:1}
.pl-ring{fill:url(#svg-gold);stroke:#6e4f12;stroke-width:1}
.pl-trace{fill:none;stroke:rgba(120,140,170,.16);stroke-width:2.2}
.pl-smd{fill:#a8865a}
.pl-chip{fill:#0b0d11;stroke:#454b57;stroke-width:1.5}
.pl-usb{fill:url(#svg-alu)}
.pl-pcb2{fill:url(#svg-pcb2);filter:url(#svg-sh2)}
.pl-gpsb{fill:#eef1f5;filter:url(#svg-sh2)} .pl-comp .pl-gold{fill:url(#svg-ceramic)}
.pl-cam{fill:url(#svg-orange);filter:url(#svg-sh2)} .pl-glass{fill:url(#svg-lens)}
.pl-au{fill:url(#svg-alu);filter:url(#svg-sh2)} .pl-fin{fill:#8d95a2}
.pl-bz{filter:url(#svg-sh2)}
.pl-wo{fill:none;stroke:rgba(10,14,22,.55);stroke-width:6.5;stroke-linejoin:round;stroke-linecap:round}
.pl-wo.on{stroke-width:8}
.pl-w{stroke-width:3.6;opacity:1}
.pl-lab{fill:#1a2230}
.pl-lab.in{fill:#e9edf2}
.pl-lab.on{fill:#d97a00}
.pl-cname{fill:#1a2230}
.sv-t.dim{fill:#5d6b80}
.bk-solder .sv-t.amber{fill:#c46a00}
.pl-stub{fill:none;stroke-width:3.6;stroke-linecap:round}

/* Umbau 28.10.2026: Fragen, Set, Tauschen mit Auswahl oben */
.bk-h4{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.bk-h4 small{font:400 13px/1.3 var(--body);letter-spacing:0;text-transform:none;color:var(--mute)}
.bk-qn{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--sig);color:var(--night);font:700 12px/1 var(--hud)}
.bk-qs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.bk-q{display:grid;gap:3px;text-align:left;padding:11px 12px;min-height:56px;border-radius:12px;border:1px solid var(--line-hi);background:rgba(4,12,28,.5);color:var(--osd);cursor:pointer;font:inherit}
.bk-q b{font:600 14.5px/1.2 var(--hud)} .bk-q small{color:var(--mute);font-size:12.5px;line-height:1.3}
.bk-q:hover{border-color:var(--sig)} .bk-q.on{border-color:var(--amber);background:rgba(255,176,32,.08)}
.bk-startgo{margin-top:18px}
.bk-startgo .btn[disabled]{opacity:.55;cursor:not-allowed}
.bk-verdict{display:flex;align-items:center;gap:9px;margin:0 0 12px;padding:10px 12px;border-radius:12px;background:rgba(62,224,138,.08);font-size:15px}
.bk-verdict i{width:10px;height:10px;border-radius:50%;background:var(--green);flex:none}
.bk-verdict.f-warn{background:rgba(255,176,32,.08)} .bk-verdict.f-warn i{background:var(--amber)}
.bk-verdict.f-bad{background:rgba(255,75,92,.1)} .bk-verdict.f-bad i{background:var(--red)}
.bk-flash{margin:0 0 12px;padding:9px 12px;border-radius:10px;border:1px solid rgba(63,224,255,.35);background:rgba(63,224,255,.07);font-size:14px;animation:bkFlash .5s ease-out}
@keyframes bkFlash{from{opacity:0;transform:translateY(-6px)}}
.bk-notes{margin:0 0 12px;padding-left:18px;color:#ffd690;font-size:14px}
.bk-set{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.bk-set-b{display:grid;grid-template-columns:36px minmax(0,1fr) auto;align-items:center;gap:10px;width:100%;padding:10px;border-radius:12px;border:1px solid var(--line);background:rgba(4,12,28,.45);color:var(--osd);text-align:left;cursor:pointer;font:inherit;transition:border-color .2s,background .2s}
.bk-set-b:hover{border-color:var(--sig);background:rgba(16,36,74,.6)}
.bk-set li.f-warn .bk-set-b{border-color:rgba(255,176,32,.45)} .bk-set li.f-bad .bk-set-b{border-color:rgba(255,75,92,.6)}
.bk-set-t{display:grid;gap:2px;min-width:0}
.bk-set-t small{font:600 11px/1.2 var(--hud);letter-spacing:.1em;text-transform:uppercase;color:var(--sig)}
.bk-set-t b{font:600 15px/1.25 var(--body)}
.bk-set-t span{color:var(--mute);font-size:13px;line-height:1.35}
.bk-set-go{font:600 12px/1 var(--hud);letter-spacing:.06em;color:var(--sig);white-space:nowrap}
.bk-why{display:block;font-style:normal;font-size:12.5px;line-height:1.35;color:#ffd690}
.f-bad .bk-why{color:#ffb3bb} .bk-why.ok{color:#9ff0c4}
.bk-fit .sel{background:var(--sig)}
.bk-opt.on .bk-fit{color:var(--sig)}
.bk-kvs{display:flex;flex-wrap:wrap;gap:6px;padding:0 10px 10px 56px}
.chip-b.rec:not(.on){border-color:rgba(62,224,138,.6);color:#9ff0c4}
.bk-filter{display:grid;gap:8px;margin:0 0 14px;padding:12px;border-radius:12px;border:1px solid var(--line-hi);background:rgba(63,224,255,.05)}
.bk-filter>span{font:600 12px/1 var(--hud);letter-spacing:.1em;text-transform:uppercase;color:var(--osd)}
.bk-chips{display:flex;flex-wrap:wrap;gap:6px}
.bk-chips .chip-b{min-height:40px}
.bk-moreopts{margin-top:12px;border-top:1px solid var(--line);padding-top:10px}
.bk-moreopts summary{cursor:pointer;min-height:40px;display:flex;align-items:center;color:var(--mute);font:600 13px/1.2 var(--hud);letter-spacing:.04em}
.bk-moreopts[open] summary{color:var(--osd);margin-bottom:8px}
.bk-fix{margin-top:6px;justify-self:start;min-height:36px;padding:0 12px;border-radius:999px;border:1px solid var(--line-hi);background:none;color:var(--sig);font:600 12px/1 var(--hud);cursor:pointer}
.bk-cl li .bk-fix{grid-column:1}

.bk-kl-tag{display:inline-block;vertical-align:middle;margin-left:6px;padding:4px 9px;border-radius:999px;background:rgba(255,176,32,.12);color:var(--amber);font:600 12px/1 var(--hud);letter-spacing:.06em;text-transform:none}

/* Anfänger-Test 28.10.: Leerzustand, Lötplan am Handy, Lesbarkeit */
.bk-zoom{display:none;min-height:36px;padding:0 12px;border-radius:999px;border:1px solid var(--line-hi);background:none;color:var(--osd);font:600 12px/1 var(--hud);letter-spacing:.06em;cursor:pointer;margin-left:auto}
.bk-app.is-solder .bk-zoom{display:inline-flex;align-items:center}
.bk-solder .sv-t.out,.bk-solder > text.sv-t:not(.pad){fill:#13202f}
.bk-solder .sv-t.out{font-weight:700}
.bk-verdict{flex-wrap:wrap}
.bk-verdict span{flex:1 1 220px;min-width:0;line-height:1.45}
.bk-verdict .bk-fix{margin-top:0}
.bk-back{display:inline-flex;align-items:center;min-height:40px;margin:0 0 8px;padding:0 12px 0 8px;border-radius:999px;border:1px solid var(--line-hi);background:none;color:var(--sig);font:600 13px/1 var(--hud);cursor:pointer}
.chip-b.dim:not(.on){opacity:.55}
@media (max-width:1100px){
  .bk-app.is-empty .bk-stagecol,.bk-app.is-empty .bk-bar{display:none}
  .bk-app.is-solder .bk-stagecol{position:sticky;top:66px;z-index:3;background:var(--night);padding:4px 0 6px}
  .bk-app.is-solder .bk-tname{display:none}
  .bk-app.is-solder .bk-stage{height:40svh;min-height:250px}
  body:has(.bk-app) .totop{bottom:92px}
}
@media (max-width:560px){
  .bk-steps button{padding:0 9px 0 5px;gap:5px;font-size:11px}
  .bk-nav .btn{padding-inline:14px;font-size:12px;letter-spacing:.06em;white-space:nowrap}
}

/* ===== Geführter Bau (Natan 28.10. 23:29): Schritte, Listen, Lötplan ohne Wackeln ===== */
.bk-steps button{flex-direction:row;align-items:center}
.bk-steps button span{display:grid;gap:3px;text-align:left}
.bk-steps button small{font:500 10.5px/1 var(--body);letter-spacing:0;text-transform:none;color:var(--mute);max-width:13ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bk-steps button:disabled{opacity:.38;cursor:not-allowed}
.bk-steps .done:not(.now) b{font-size:12px}
.bk-sh{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 6px}
.bk-kicker{margin:0;font:600 11.5px/1 var(--hud);letter-spacing:.16em;text-transform:uppercase;color:var(--sig)}
.bk-reset{background:none;border:1px solid var(--line-hi);border-radius:999px;color:var(--mute);font:600 11.5px/1 var(--hud);letter-spacing:.08em;padding:8px 12px;cursor:pointer}
.bk-reset:hover{color:var(--osd);border-color:var(--sig)}
.bk-info{display:flex;gap:10px;align-items:flex-start;margin:0 0 14px;padding:10px 12px;border-radius:12px;border:1px solid rgba(63,224,255,.3);background:rgba(63,224,255,.06);font-size:14px;line-height:1.45}
.bk-info i{flex:none;width:8px;height:8px;margin-top:6px;border-radius:50%;background:var(--sig)}
.bk-sub{margin:14px 0 8px;color:var(--mute);font-size:14px}
.bk-auto{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;margin:0 0 12px;padding:12px 14px;border-radius:12px;border:1px dashed rgba(62,224,138,.55);background:rgba(62,224,138,.06);color:var(--osd);cursor:pointer;text-align:left;font:600 13px/1.2 var(--hud);letter-spacing:.06em}
.bk-auto b{font:600 14px/1.2 var(--body);letter-spacing:0;color:#9ff0c4;text-align:right}
.bk-auto:hover{border-style:solid;background:rgba(62,224,138,.12)}
.bk-find{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,44%);gap:8px;margin:0 0 10px}
.bk-find input,.bk-find select{width:100%;min-height:44px;padding:0 12px;border-radius:10px;border:1px solid var(--line-hi);background:rgba(3,8,18,.7);color:var(--osd);font:400 15px var(--body)}
.bk-find select{appearance:auto}
.bk-list{list-style:none;margin:0 0 6px;padding:0;display:grid;gap:6px}
.bk-row[hidden]{display:none}
.bk-row{border-radius:12px;border:1px solid var(--line);background:rgba(4,12,28,.45);transition:border-color .2s,background .2s}
.bk-row:hover{border-color:var(--line-hi)}
.bk-row.on{border-color:var(--sig);background:rgba(63,224,255,.09);box-shadow:inset 0 0 0 1px rgba(63,224,255,.35)}
.bk-row.f-warn:not(.on){border-color:rgba(255,176,32,.35)}
.bk-row-b{display:grid;grid-template-columns:20px 34px minmax(0,1fr) auto;align-items:center;gap:10px;width:100%;padding:10px 12px;border:0;background:none;color:var(--osd);text-align:left;cursor:pointer;font:inherit}
.bk-row-b:focus-visible{outline:2px solid var(--amber);outline-offset:-2px;border-radius:12px}
.bk-radio,.bk-check{width:18px;height:18px;border-radius:50%;border:2px solid var(--line-hi);display:grid;place-items:center}
.bk-check{border-radius:5px}
.bk-row.on .bk-radio,.bk-row.on .bk-check{border-color:var(--sig);background:var(--sig);box-shadow:inset 0 0 0 3px var(--night)}
.bk-row.on .bk-check{box-shadow:none;background:var(--sig) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8l3 3 7-7' fill='none' stroke='%23040912' stroke-width='2.4'/%3E%3C/svg%3E") center/12px no-repeat}
.bk-row-t{display:grid;gap:3px;min-width:0}
.bk-row-t b{font:600 15px/1.25 var(--body)}
.bk-row-t small{color:var(--mute);font-size:12.5px;line-height:1.35}
.bk-row-t .bk-why{font-size:12.5px;color:#ffd08a}
.bk-tags{display:flex;flex-direction:column;align-items:flex-end;gap:4px}
.bk-tag{display:inline-flex;align-items:center;padding:4px 8px;border-radius:999px;font:600 10.5px/1 var(--hud);letter-spacing:.08em;text-transform:uppercase;white-space:nowrap;border:1px solid var(--line-hi);color:var(--mute)}
.bk-tag.rec{border-color:rgba(62,224,138,.6);color:#9ff0c4;background:rgba(62,224,138,.08)}
.bk-tag.warn{border-color:rgba(255,176,32,.6);color:#ffd08a}
.bk-tag.plan{border-color:rgba(63,224,255,.55);color:var(--sig)}
.bk-tag.dim{opacity:.7}
.bk-h4 .bk-tag{vertical-align:middle;margin-left:6px}
.bk-kvrow{display:grid;gap:6px;padding:0 12px 12px 76px}
.bk-kvrow>span:first-child{font:600 11px/1 var(--hud);letter-spacing:.1em;text-transform:uppercase;color:var(--mute)}
.bk-nolist{list-style:none;margin:8px 0 0;padding:0;display:grid;gap:6px}
.bk-nolist li{display:grid;gap:2px;padding:8px 10px;border-radius:10px;background:rgba(255,75,92,.06);border:1px solid rgba(255,75,92,.22);font-size:13px}
.bk-nolist span{color:var(--mute)}
.bk-sum{list-style:none;margin:0 0 12px;padding:0;display:grid;gap:4px}
.bk-sum li{display:grid;grid-template-columns:110px minmax(0,1fr) auto;gap:8px;align-items:baseline;padding:6px 0;border-bottom:1px solid var(--line);font-size:14px}
.bk-sum span{color:var(--mute);font:600 11px/1.2 var(--hud);letter-spacing:.08em;text-transform:uppercase}
.bk-solcard{padding:14px;border-radius:14px;border:1px solid rgba(63,224,255,.4);background:linear-gradient(180deg,rgba(63,224,255,.08),rgba(63,224,255,.02));margin:0 0 10px}
.bk-solcard .bk-kicker{margin-bottom:8px}
.bk-soltext{font-size:15.5px;line-height:1.55}
.bk-soltext code{font:600 13px var(--hud);padding:1px 6px;border-radius:5px;background:rgba(255,255,255,.08)}
.bk-solnav{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;margin:0 0 12px}
.bk-solnav .btn{min-height:44px}
.bk-solnav .btn:disabled{opacity:.4;cursor:not-allowed}
.bk-dots{display:flex;justify-content:center;flex-wrap:wrap;gap:5px}
.bk-dots i{width:8px;height:8px;border-radius:50%;background:var(--line-hi)}
.bk-dots i.done{background:rgba(62,224,138,.7)}
.bk-dots i.on{background:var(--sig);box-shadow:0 0 0 3px rgba(63,224,255,.25)}
.bk-nav .btn.ready:not(:disabled){animation:bkReady 1.6s ease-out 1}
.bk-nav .btn:disabled{opacity:.5;cursor:not-allowed}
@keyframes bkReady{0%{box-shadow:0 0 0 0 rgba(63,224,255,.6)}100%{box-shadow:0 0 0 14px rgba(63,224,255,0)}}
/* Lötplan: kein Kippen, kein Hin-und-her-Drehen mehr */
.bk-solder,.bk-solder.tilt{animation:none;transform:none}
.bk-solder.fade{animation:plFade .35s ease-out}
@keyframes plFade{from{opacity:.25}to{opacity:1}}
.pl-board.flip{animation:none}
.bk-vlabel{position:absolute;left:12px;top:12px;z-index:3;display:flex;align-items:center;gap:10px;flex-wrap:wrap;max-width:calc(100% - 24px);margin:0;padding:8px 12px;border-radius:12px;background:rgba(4,9,18,.82);border:1px solid var(--line-hi);color:var(--osd);font-size:13.5px;pointer-events:none}
.bk-vlabel[hidden]{display:none}
.bk-vlabel small{width:100%;color:var(--mute);font:600 10.5px/1 var(--hud);letter-spacing:.1em;text-transform:uppercase}
.bk-stk{display:grid;gap:3px;width:26px}
.bk-stk i{display:block;height:6px;border-radius:2px;background:rgba(255,255,255,.18)}
.bk-stk.top i:first-child,.bk-stk.bottom i:last-child,.bk-stk.aio i{background:var(--sig)}
.bk-stk.aio i:last-child{display:none}
.pl-iron{animation:plIron 2.4s .6s both cubic-bezier(.3,.7,.2,1)}
@keyframes plIron{0%{transform:translate(130px,-130px);opacity:0}20%{opacity:1}42%{transform:translate(0,0)}72%{transform:translate(0,0);opacity:1}100%{transform:translate(90px,-90px);opacity:0}}
.pl-iron-tip{stroke:#b9c0ca;stroke-width:5;stroke-linecap:round;fill:none}
.pl-iron-col{stroke:#6f7682;stroke-width:9;stroke-linecap:round;fill:none}
.pl-iron-grip{stroke:#f07c12;stroke-width:16;stroke-linecap:round;fill:none}
.pl-spark{fill:#ffcf5a;opacity:0;animation:plSpark 2.4s .6s both}
@keyframes plSpark{0%,40%{opacity:0;r:2}46%{opacity:.95;r:15}72%{opacity:.4;r:9}100%{opacity:0;r:3}}
.pl-blob.fresh{animation-delay:1.7s}
@media (prefers-reduced-motion:reduce){.pl-iron,.pl-spark{animation:none;display:none}}
@media (max-width:620px){
  .bk-row-b{grid-template-columns:18px 28px minmax(0,1fr);gap:8px;padding:10px}
  .bk-tags{grid-column:2/-1;flex-direction:row;flex-wrap:wrap;align-items:center}
  .bk-kvrow{padding:0 10px 10px 10px}
  .bk-find{grid-template-columns:minmax(0,1fr)}
  .bk-solnav{grid-template-columns:1fr 1fr}
  .bk-dots{grid-column:1/-1;order:-1}
  .bk-sum li{grid-template-columns:90px minmax(0,1fr) auto}
  .bk-vlabel{font-size:12.5px;padding:6px 10px}
}

/* Kein verstecktes Scrollen mehr im Bedienfeld (Natan 28.10. 23:42: „man sieht nicht, dass man runterscrollen kann“):
   Das Feld wächst mit, die Seite scrollt; Schrittleiste oben und Zurück/Weiter unten bleiben immer sichtbar. */
.bk-panel{height:auto;min-height:0;overflow:visible}
.bk-body{overflow:visible;padding-bottom:16px}
.bk-steps{flex-wrap:wrap;overflow:visible;gap:5px;padding:10px;position:sticky;top:72px;z-index:4;background:#0c1d39;border-radius:var(--r) var(--r) 0 0}
.bk-steps button{min-height:34px;padding:0 10px 0 5px;gap:6px;border-color:var(--line)}
.bk-steps button:not(:disabled):hover{border-color:var(--sig);color:var(--osd)}
.bk-nav{position:sticky;bottom:0;z-index:4;background:linear-gradient(180deg,rgba(7,18,37,.92),#071225 40%);border-radius:0 0 var(--r) var(--r);box-shadow:0 -14px 22px -10px rgba(2,6,14,.9);backdrop-filter:blur(6px)}
.bk-nav .btn{min-height:50px}
.bk-nav [data-bk-next]{flex:1;justify-content:center;font-size:14px}
@media (min-width:1101px){
  .bk-app{align-items:start}
  .bk-stagecol{position:sticky;top:84px;align-self:start}
  .bk-stage{height:min(calc(100svh - 250px),700px)}
}
@media (max-width:1100px){
  .bk-steps{top:62px}
  .bk-nav{bottom:76px}
}
@media (max-width:560px){
  .bk-steps button span small{display:none}
  .bk-steps button{min-height:32px;padding:0 8px 0 4px;font-size:10.5px}
  .bk-steps b{width:22px;height:22px}
  .bk-nav{bottom:70px}
}
.bk-vlabel{top:auto;bottom:12px}
.bk-solnav{grid-template-columns:1fr 1fr}
.bk-solnav .bk-dots{grid-column:1/-1;order:-1;justify-content:flex-start;margin:0 0 2px}
.bk-solnav .btn{justify-content:center}
.bk-nav [data-bk-next]{font-size:13px;letter-spacing:.08em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media (max-width:1100px){.bk-steps{position:static;border-radius:var(--r) var(--r) 0 0}}