/* MosPC: PCB-inspired. Light = silkscreen paper, dark = solder mask. Copper accent. Layout: left-aligned editorial hero with live board; builder as two columns (parts | summary). */
:root{
  --bg:#EDF2EF;--surface:#FFFFFF;--surface2:#E3EBE7;--ink:#10231E;--mute:#5B6F68;--line:#CBD8D2;
  --accent:#A85F14;--on-accent:#FFFFFF;--ok:#12805A;--warn:#9A5B00;--err:#C23B2E;
  --cl:44%;
  --bd-bg:#0D2F28;--bd-node:#133D34;--bd-ink:#E9F3EE;--bd-mute:#8FB1A5;--cu:#E4A15C;--bd-ok:#5FD6A4;--bd-warn:#F0B65A;--bd-err:#FF7A6B;
  --f-display:'Unbounded','Trebuchet MS',system-ui,sans-serif;
  --f-body:'Onest',system-ui,-apple-system,'Segoe UI',sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0A1714;--surface:#11231F;--surface2:#17302A;--ink:#E6F0EB;--mute:#8CA69C;--line:#223D36;
  --accent:#E4A15C;--on-accent:#1A1206;--ok:#5FD6A4;--warn:#F0B65A;--err:#FF7A6B;--cl:62%;color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0A1714;--surface:#11231F;--surface2:#17302A;--ink:#E6F0EB;--mute:#8CA69C;--line:#223D36;
  --accent:#E4A15C;--on-accent:#1A1206;--ok:#5FD6A4;--warn:#F0B65A;--err:#FF7A6B;--cl:62%;color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.55 var(--f-body);-webkit-font-smoothing:antialiased}
.shell{width:min(1120px,100%);margin-inline:auto;padding-inline:20px}
a{color:inherit}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums}

/* header */
.hdr{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hdr .shell{display:flex;align-items:center;gap:16px;height:60px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;font:600 18px var(--f-display);letter-spacing:-.02em}
.logo svg{width:30px;height:30px;flex:none}
.nav{display:flex;gap:22px;margin-left:24px}
.nav a{text-decoration:none;color:var(--mute);font-size:15px}
.nav a:hover{color:var(--ink)}
.tools{margin-left:auto;display:flex;gap:8px;align-items:center;position:relative}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:10px;padding:3px;background:var(--surface)}
.seg button{border:0;background:none;padding:6px 12px;border-radius:7px;cursor:pointer;color:var(--mute);font-size:14px;font-weight:500}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.ib{width:38px;height:38px;border:1px solid var(--line);background:var(--surface);border-radius:10px;cursor:pointer;display:grid;place-items:center}
.ib svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.pop{position:absolute;right:0;top:48px;width:270px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px;box-shadow:0 12px 32px rgba(0,0,0,.18)}
.pop label{display:block;font-size:13px;color:var(--mute);margin:10px 0 4px}
.pop label:first-child{margin-top:0}
.pop input{width:100%}
.pop p{margin:10px 0 0;font-size:12px;color:var(--mute)}
input[type=number],input[type=text],input[type=search],select{background:var(--bg);border:1px solid var(--line);border-radius:9px;padding:9px 11px;min-width:0}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:10px 16px;font-weight:600;font-size:15px;cursor:pointer;text-decoration:none;line-height:1.2}
.btn.pri{background:var(--accent);color:var(--on-accent)}
.btn.pri:hover{filter:brightness(1.07)}
.btn.sec{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn.sec:hover{border-color:var(--mute)}
.btn.sm{padding:7px 12px;font-size:14px;border-radius:8px}
.btn.quiet{background:none;color:var(--mute);padding:7px 8px;font-weight:500}
.btn.quiet:hover{color:var(--ink)}
.btn[disabled]{opacity:.5;cursor:default}

/* hero */
.hero{padding-block:48px 56px}
.hero .shell{display:grid;gap:36px;grid-template-columns:minmax(0,1fr)}
.hero h1{font:600 clamp(30px,5.2vw,52px)/1.08 var(--f-display);letter-spacing:-.035em;margin:0 0 16px;text-wrap:balance}
.lead{font-size:18px;color:var(--mute);max-width:52ch;margin:0 0 28px}
.ctl{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px;max-width:520px}
.ctl-top{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin-bottom:6px}
.amt{font:600 clamp(26px,4vw,34px)/1.1 var(--f-display);letter-spacing:-.03em}
.amt-sub{color:var(--mute);font-size:14px;margin-top:4px}
.ctl .lab{font-size:13px;color:var(--mute)}
input[type=range]{width:100%;margin:14px 0 6px;accent-color:var(--accent);height:28px;background:none;border:0;padding:0}
.rng{display:flex;justify-content:space-between;font-size:12px;color:var(--mute)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.chip{border:1px solid var(--line);background:var(--bg);border-radius:99px;padding:7px 14px;font-size:14px;font-weight:500;cursor:pointer;color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.hero-cta{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}

/* board */
.board{background:var(--bd-bg);border-radius:18px;padding:16px;border:1px solid color-mix(in srgb,var(--bd-ink) 14%,transparent);min-width:0}
.board-h{display:flex;justify-content:space-between;align-items:center;gap:10px;color:var(--bd-ink);margin-bottom:6px;font-size:14px}
.board-h b{font-weight:600}
.stat{display:inline-flex;align-items:center;gap:7px;border-radius:99px;padding:4px 11px;font-size:13px;font-weight:600;background:color-mix(in srgb,var(--bd-ok) 18%,transparent);color:var(--bd-ok)}
.stat.warn{background:color-mix(in srgb,var(--bd-warn) 18%,transparent);color:var(--bd-warn)}
.stat.err{background:color-mix(in srgb,var(--bd-err) 20%,transparent);color:var(--bd-err)}
.stat i{width:8px;height:8px;border-radius:50%;background:currentColor}
.board svg{display:block;width:100%;height:auto}
.tr{fill:none;stroke:var(--cu);stroke-width:2.5;stroke-linejoin:round}
.tr.off{stroke:var(--bd-mute);stroke-dasharray:4 5;stroke-width:1.5;opacity:.6}
.tr.warn{stroke:var(--bd-warn)}
.tr.err{stroke:var(--bd-err);stroke-width:3}
.pad{fill:var(--cu)}.pad.off{fill:var(--bd-mute);opacity:.6}.pad.warn{fill:var(--bd-warn)}.pad.err{fill:var(--bd-err)}
.nd rect{fill:var(--bd-node);stroke:var(--cu);stroke-width:1.5}
.nd.empty rect{fill:none;stroke:var(--bd-mute);stroke-dasharray:4 4;opacity:.8}
.nd.mb rect{fill:color-mix(in srgb,var(--cu) 14%,var(--bd-node));stroke-width:2}
.nd{cursor:pointer}
.nd:hover rect{stroke:var(--bd-ink)}
.nd .k{fill:var(--bd-mute);font:500 10.5px var(--f-body)}
.nd .v{fill:var(--bd-ink);font:600 12.5px var(--f-body)}
.nd .p{fill:var(--cu);font:600 11px var(--f-body)}
.nd.empty .v{fill:var(--bd-mute);font-weight:500}
.board-f{color:var(--bd-mute);font-size:12.5px;margin-top:8px}

/* sections */
.sec{padding-block:56px}
.sec h2{font:600 clamp(24px,3.4vw,32px)/1.15 var(--f-display);letter-spacing:-.03em;margin:0 0 8px}
.sec .sub{color:var(--mute);margin:0 0 28px;max-width:60ch}
.build{display:grid;gap:24px;grid-template-columns:minmax(0,1fr);align-items:start}
.parts{display:flex;flex-direction:column;gap:10px;min-width:0}
.part{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px;display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:6px 14px;align-items:center}
.part.empty{background:none;border-style:dashed}
.ico{width:44px;height:44px;border-radius:11px;background:var(--surface2);display:grid;place-items:center;color:var(--accent)}
.ico svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.part .cat{font-size:13px;color:var(--mute)}
.part .nm{font-weight:600;font-size:16px;line-height:1.3;overflow-wrap:anywhere}
.part .sp{font-size:13px;color:var(--mute)}
.part .pr{text-align:right}
.price{font:600 18px var(--f-display);letter-spacing:-.02em;white-space:nowrap}
.price-sub{font-size:12.5px;color:var(--mute)}
.shop{font-size:12.5px;color:var(--mute)}
.part .acts{grid-column:1/-1;display:flex;gap:8px;flex-wrap:wrap;padding-top:10px;border-top:1px solid var(--line);margin-top:6px}
.part .acts .grow{margin-left:auto}
.part.empty .go{grid-column:3;grid-row:1}
.part.empty .hint{grid-column:2;font-size:13px;color:var(--mute)}
.part .bad{color:var(--err);font-size:13px;font-weight:500}

/* summary */
.sum{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:18px;min-width:0}
.tot-l{font-size:13px;color:var(--mute)}
.tot{font:600 clamp(26px,4vw,32px)/1.1 var(--f-display);letter-spacing:-.03em}
.meter{height:8px;border-radius:99px;background:var(--surface2);overflow:hidden;margin-top:8px}
.meter i{display:block;height:100%;border-radius:99px;background:var(--ok);transition:width .25s}
.meter i.warn{background:var(--warn)}.meter i.err{background:var(--err)}
.row2{display:flex;justify-content:space-between;gap:10px;font-size:14px}
.row2 span:first-child{color:var(--mute)}
.bk{display:flex;height:12px;border-radius:99px;overflow:hidden;background:var(--surface2);gap:2px;margin-top:8px}
.bk i{display:block;height:100%}
.lg{display:grid;grid-template-columns:1fr 1fr;gap:6px 14px;margin-top:10px;font-size:13px}
.lg span{display:flex;align-items:center;gap:7px;min-width:0}
.lg b{width:9px;height:9px;border-radius:3px;flex:none}
.lg em{font-style:normal;color:var(--mute);margin-left:auto}
.iss{display:flex;flex-direction:column;gap:6px;margin:0;padding:0;list-style:none}
.iss li{display:flex;gap:9px;font-size:14px;padding:9px 11px;border-radius:9px}
.iss li::before{content:"";flex:none;width:8px;height:8px;border-radius:50%;margin-top:7px;background:currentColor}
.iss .e{background:color-mix(in srgb,var(--err) 12%,transparent);color:var(--err)}
.iss .w{background:color-mix(in srgb,var(--warn) 13%,transparent);color:var(--warn)}
.iss .o{background:color-mix(in srgb,var(--ok) 13%,transparent);color:var(--ok)}
.iss li span{color:var(--ink)}
.sum h3{font:600 15px var(--f-body);margin:0}
.saved{display:flex;flex-direction:column;gap:6px;margin-top:8px}
.sv{display:flex;align-items:center;gap:8px;font-size:14px;border:1px solid var(--line);border-radius:9px;padding:7px 10px}
.sv .n{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sv .t{color:var(--mute);font-size:13px}
.savef{display:flex;gap:8px;margin-top:8px}
.savef input{flex:1}
.toast{font-size:13px;color:var(--ok);min-height:18px}
.dock{position:fixed;left:0;right:0;bottom:0;z-index:25;background:var(--surface);border-top:1px solid var(--line);padding:10px 20px calc(10px + env(safe-area-inset-bottom,0px));display:flex;align-items:center;justify-content:space-between;gap:12px}
.dock .tot{font-size:20px}
body{padding-bottom:70px}

/* checks */
.checks{display:grid;gap:0;border-top:1px solid var(--line)}
.ck{display:grid;gap:4px 24px;padding:16px 0;border-bottom:1px solid var(--line);grid-template-columns:minmax(0,1fr)}
.ck b{font-weight:600}
.ck span{color:var(--mute)}
.shopc{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px}
.shopc .n{font:600 18px var(--f-display);letter-spacing:-.02em}
.ftr{border-top:1px solid var(--line);padding-block:28px;color:var(--mute);font-size:14px}
.ftr .shell{display:grid;gap:8px}

/* picker */
.ov{position:fixed;inset:0;z-index:50;background:rgba(5,14,12,.62);display:flex;align-items:flex-end;justify-content:center}
.dlg{background:var(--bg);width:min(680px,100%);max-height:88vh;border-radius:18px 18px 0 0;display:flex;flex-direction:column;border:1px solid var(--line)}
.dlg-h{padding:16px 18px 12px;border-bottom:1px solid var(--line);display:grid;gap:10px}
.dlg-t{display:flex;justify-content:space-between;align-items:center}
.dlg-t b{font:600 18px var(--f-display);letter-spacing:-.02em}
.dlg-c{display:flex;gap:10px;flex-wrap:wrap;align-items:center;font-size:14px}
.dlg-c input[type=search]{flex:1 1 180px}
.dlg-c label{display:flex;gap:6px;align-items:center;color:var(--mute)}
.dlg-l{overflow:auto;padding:4px 18px 18px}
.opt{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 14px;padding:12px 0;border-bottom:1px solid var(--line);cursor:pointer;width:100%;text-align:left;background:none;border-left:0;border-right:0;border-top:0}
.opt:hover .nm{color:var(--accent)}
.opt .nm{font-weight:600;overflow-wrap:anywhere}
.opt .sp{font-size:13px;color:var(--mute)}
.opt .bad{font-size:13px;color:var(--err)}
.opt.cur{background:color-mix(in srgb,var(--accent) 8%,transparent)}
.none{color:var(--mute);padding:28px 0;text-align:center}

@media (min-width:720px){
  .ck{grid-template-columns:260px minmax(0,1fr)}
  .ov{align-items:center}
  .dlg{border-radius:18px}
}
@media (min-width:960px){
  .hero .shell{grid-template-columns:minmax(0,5fr) minmax(0,6fr);align-items:center;gap:48px}
  .build{grid-template-columns:minmax(0,1fr) 380px}
  .sum{position:sticky;top:76px}
  .dock{display:none}
  body{padding-bottom:0}
}
@media (max-width:719px){
  .nav{display:none}
  .seg button{padding:6px 10px}
  .hdr .shell{gap:10px}
  .part{grid-template-columns:44px minmax(0,1fr)}
  .part .pr{grid-column:1/-1;text-align:left;display:flex;justify-content:space-between;align-items:baseline}
  .part.empty .go{grid-column:1/-1;grid-row:auto}
  .part.empty .hint{grid-column:1/-1}
  .lg{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}