/* Layout: two-column workbench — construction inputs left, live verdict + section drawing right (sticky); stacks on phones */
:root{
  --bg:#f3f5f8; --surface:#ffffff; --sunk:#eaeef3; --ink:#152029; --muted:#5a6876; --line:#d9dfe6;
  --cold:#2b68cf; --warm:#dc5a24; --accent:#2b68cf;
  --ok:#1d8048; --ok-bg:#e3f4ea; --bad:#be3427; --bad-bg:#fbe7e4; --warn:#9a6411; --warn-bg:#fbf0dc;
  --m-conc:#a7adb4; --m-brick:#c9775a; --m-ac:#d9d2c4; --m-wood:#c99a5b; --m-ins:#f0c94a; --m-fin:#d8dde2; --m-film:#6b7f96; --m-air:#e9f0f8;
  --f-display:"Unbounded","IBM Plex Sans",system-ui,sans-serif;
  --f-body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --r:10px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0e1318; --surface:#161d25; --sunk:#1c252f; --ink:#e4eaf0; --muted:#94a2b1; --line:#2b3642;
  --cold:#6d9ff5; --warm:#ff8b57; --accent:#6d9ff5;
  --ok:#4cc781; --ok-bg:#163423; --bad:#ff7466; --bad-bg:#3a1c19; --warn:#e6aa48; --warn-bg:#3a2c14;
  --m-conc:#6c737b; --m-brick:#9c5741; --m-ac:#8f897c; --m-wood:#91703f; --m-ins:#b8952c; --m-fin:#59626c; --m-film:#8ea3bb; --m-air:#1f2b38;
  color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0e1318; --surface:#161d25; --sunk:#1c252f; --ink:#e4eaf0; --muted:#94a2b1; --line:#2b3642;
  --cold:#6d9ff5; --warm:#ff8b57; --accent:#6d9ff5;
  --ok:#4cc781; --ok-bg:#163423; --bad:#ff7466; --bad-bg:#3a1c19; --warn:#e6aa48; --warn-bg:#3a2c14;
  --m-conc:#6c737b; --m-brick:#9c5741; --m-ac:#8f897c; --m-wood:#91703f; --m-ins:#b8952c; --m-fin:#59626c; --m-film:#8ea3bb; --m-air:#1f2b38;
  color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.5;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:20px 48px}
.wrap{max-width:1240px;margin:0 auto;display:flex;flex-direction:column;gap:20px}
header.top{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px}
h1,.calc-h{font-family:var(--f-display);font-weight:600;font-size:clamp(22px,3.2vw,32px);line-height:1.15;margin:0;text-wrap:balance;letter-spacing:-.01em}
h1 .grad{background:linear-gradient(90deg,var(--cold),var(--warm));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--muted);margin:6px 0 0;max-width:62ch}
.seg{display:inline-flex;background:var(--sunk);border:1px solid var(--line);border-radius:999px;padding:3px}
.seg button{border:0;background:transparent;color:var(--muted);font:500 14px var(--f-body);padding:7px 16px;border-radius:999px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:20px;align-items:start}
@media (max-width:900px){.grid{grid-template-columns:minmax(0,1fr)}}
.col{display:flex;flex-direction:column;gap:16px;min-width:0}
.sticky{position:sticky;top:calc(env(safe-area-inset-top,0px) + 12px)}
@media (max-width:900px){.sticky{position:static}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;display:flex;flex-direction:column;gap:14px;min-width:0}
.panel h2{font:600 13px var(--f-body);text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:0;display:flex;align-items:center;gap:8px}
.panel h2 .n{font-family:var(--f-mono);color:var(--accent)}
label.f{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--muted);min-width:0}
input,select{font:inherit;font-size:15px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:8px 10px;min-width:0;width:100%}
input:focus-visible,select:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
input[type=number]{font-family:var(--f-mono)}
.row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.hint{font-size:12.5px;color:var(--muted);margin:0}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:var(--sunk);border-radius:8px;padding:6px 10px;font-size:12.5px;color:var(--muted);display:flex;flex-direction:column;gap:1px;min-width:0}
.chip b{font:600 15px var(--f-mono);color:var(--ink)}
/* city search */
.combo{position:relative}
.combo ul{position:absolute;z-index:20;left:0;right:0;top:calc(100% + 4px);max-height:300px;overflow:auto;margin:0;padding:4px;list-style:none;background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.combo li{padding:7px 10px;border-radius:6px;cursor:pointer;display:flex;justify-content:space-between;gap:12px}
.combo li small{color:var(--muted);text-align:right}
.combo li[aria-selected="true"],.combo li:hover{background:var(--sunk)}
/* layers */
.layers{display:flex;flex-direction:column;gap:8px}
.side-tag{font:600 11px var(--f-body);letter-spacing:.08em;text-transform:uppercase;display:flex;align-items:center;gap:8px}
.side-tag.in{color:var(--warm)} .side-tag.out{color:var(--cold)}
.side-tag::after{content:"";flex:1;height:1px;background:var(--line)}
.layer{position:relative;display:grid;grid-template-columns:20px minmax(0,1fr) 92px auto;gap:8px;align-items:center;background:var(--sunk);border-radius:8px;padding:8px}
.layer.pro{grid-template-columns:20px minmax(0,1fr) 84px 84px auto}
.layer.off{opacity:.5}
@media (max-width:560px){
  .layer{grid-template-columns:20px minmax(0,1fr) auto}
  .layer.pro{grid-template-columns:20px minmax(0,1fr) minmax(0,1fr) auto}
  .layer select{grid-column:2 / -1}
  .layer .sw{grid-row:span 2;height:100%}
}
.sw{width:14px;height:34px;border-radius:3px;border:1px solid var(--line)}
.sw.grip{width:20px;cursor:grab;touch-action:none;position:relative;user-select:none}
.sw.grip::after{content:"";position:absolute;inset:0;margin:auto;width:6px;height:14px;background:radial-gradient(circle,rgba(255,255,255,.95) 1.3px,transparent 1.6px) 0 0/3px 4.6px;filter:drop-shadow(0 0 1px rgba(0,0,0,.6))}
.sw.grip:hover{outline:2px solid var(--accent);outline-offset:1px}
.layers.is-dragging{user-select:none}
.layers.is-dragging .layer:not(.dragging){transition:transform .15s ease}
.layer.dragging{z-index:2;box-shadow:0 8px 24px rgba(0,0,0,.18);cursor:grabbing;opacity:.97}
.layer.dragging .sw.grip{cursor:grabbing}
.layer select{padding:6px 8px;font-size:14px}
.layer input{padding:6px 8px;font-size:14px}
.layer .mm{position:relative}
.layer .mm::after{content:attr(data-u);position:absolute;right:8px;top:50%;transform:translateY(-50%);font-size:11px;color:var(--muted);pointer-events:none}
.layer .mm input{padding-right:30px}
.ib{border:1px solid transparent;background:transparent;color:var(--muted);width:30px;height:30px;border-radius:6px;cursor:pointer;font-size:16px;line-height:1;display:grid;place-items:center}
.ib:hover{background:var(--surface);color:var(--ink);border-color:var(--line)}
.ib:disabled{opacity:.3;cursor:default}
.lact{display:flex;gap:2px}
.btn{font:500 14px var(--f-body);border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:8px;padding:8px 14px;cursor:pointer}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btnrow{display:flex;flex-wrap:wrap;gap:8px}
.note{font-size:12.5px;color:var(--muted);background:var(--sunk);border-radius:8px;padding:8px 10px;margin:0}
/* verdict */
.verdict{border-radius:var(--r);padding:18px;display:flex;flex-direction:column;gap:12px;border:1px solid var(--line);background:var(--surface)}
.vhead{display:flex;flex-wrap:wrap;align-items:center;gap:10px;justify-content:space-between}
.pill{font:600 13px var(--f-body);border-radius:999px;padding:5px 12px;display:inline-flex;align-items:center;gap:6px}
.pill.ok{background:var(--ok-bg);color:var(--ok)} .pill.bad{background:var(--bad-bg);color:var(--bad)} .pill.warn{background:var(--warn-bg);color:var(--warn)}
.vtitle{font:600 18px var(--f-display);margin:0;line-height:1.3;text-wrap:balance}
.big{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
@media (max-width:480px){.big{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}
.stat{background:var(--sunk);border-radius:8px;padding:10px 12px;display:flex;flex-direction:column;gap:2px;min-width:0}
.stat span{font-size:12px;color:var(--muted)}
.stat b{font:600 22px var(--f-mono);font-variant-numeric:tabular-nums;white-space:nowrap}
.stat small{font-size:11.5px;color:var(--muted)}
.meter{position:relative;height:12px;background:var(--sunk);border-radius:999px;overflow:visible}
.meter i{position:absolute;left:0;top:0;bottom:0;border-radius:999px}
.meter .tick{position:absolute;top:-5px;bottom:-5px;width:2px;background:var(--ink)}
.meterlab{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);font-family:var(--f-mono)}
.fix{border-top:1px dashed var(--line);padding-top:12px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between}
.fix p{margin:0;max-width:52ch}
/* drawing */
.drawing{overflow-x:auto}
.drawing svg{display:block;width:100%;height:auto;min-width:460px}
.legend{display:flex;flex-wrap:wrap;gap:14px;font-size:12px;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{display:inline-block;width:18px;height:3px;border-radius:2px}
.checks{display:flex;flex-direction:column;gap:8px;margin:0;padding:0;list-style:none}
.checks li{display:grid;grid-template-columns:22px minmax(0,1fr) auto;gap:10px;align-items:start;padding:8px 0;border-bottom:1px solid var(--line)}
.checks li:last-child{border-bottom:0}
.checks .ic{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:700}
.ic.ok{background:var(--ok-bg);color:var(--ok)} .ic.bad{background:var(--bad-bg);color:var(--bad)} .ic.warn{background:var(--warn-bg);color:var(--warn)}
.checks b{font-weight:600}
.checks .v{font-family:var(--f-mono);font-size:13px;white-space:nowrap;text-align:right}
.checks p{margin:2px 0 0;font-size:12.5px;color:var(--muted)}
table{border-collapse:collapse;width:100%;font-size:13.5px}
th,td{text-align:left;padding:7px 8px;border-bottom:1px solid var(--line)}
th{font-weight:500;color:var(--muted);font-size:12px}
td.num,th.num{text-align:right;font-family:var(--f-mono);font-variant-numeric:tabular-nums}
tr.cur td{background:var(--sunk)}
.tablewrap{overflow-x:auto}
.brbody{display:flex;flex-direction:column;gap:14px;min-width:0}
.stack{display:flex;height:14px;border-radius:999px;overflow:hidden;background:var(--sunk)}
.stack i{display:block;height:100%}
.blist{display:flex;flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;font-size:13px}
.blist li{display:grid;grid-template-columns:12px minmax(0,1fr) auto auto;gap:8px;align-items:center}
.blist li i{width:10px;height:10px;border-radius:3px}
.blist .v{font-family:var(--f-mono);font-size:12.5px;color:var(--muted);text-align:right;white-space:nowrap}
.brsec{display:flex;flex-direction:column;gap:8px}
.brsec h3{margin:0;font:600 13px var(--f-body)}
.brrow{display:grid;grid-template-columns:minmax(0,1fr) 92px 92px 30px;gap:8px;align-items:end;background:var(--sunk);border-radius:8px;padding:8px}
.brrow label.f{font-size:11.5px}
.brrow select,.brrow input{padding:6px 8px;font-size:14px}
@media (max-width:560px){.brrow{grid-template-columns:minmax(0,1fr) minmax(0,1fr) 30px}.brrow>label:first-child{grid-column:1 / -1}}
.src{font-size:11.5px;color:var(--muted);grid-column:1 / -1;margin-top:-2px}
.chk{display:flex;gap:8px;align-items:center;font-size:14px}
.chk input{width:auto}
.tip{display:inline;position:static;vertical-align:middle}
.tip summary{list-style:none;cursor:pointer;display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;background:var(--sunk);border:1px solid var(--line);font:600 11px var(--f-body);color:var(--muted);text-transform:none;letter-spacing:0;vertical-align:middle;margin-left:4px}
.tip summary::-webkit-details-marker{display:none}
.tip[open] summary{background:var(--accent);color:#fff;border-color:var(--accent)}
.tip>span{display:block;margin-top:6px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:9px 11px;font:400 12.5px/1.45 var(--f-body);color:var(--ink);text-transform:none;letter-spacing:0;max-width:340px}
.cost{display:flex;flex-wrap:wrap;gap:10px}
.cost .stat{flex:1 1 140px}
table.cmp td,table.cmp th{white-space:nowrap}
table.cmp td.name{white-space:normal;min-width:150px}
table.cmp tr.now td{background:var(--sunk)}
.best{color:var(--ok);font-weight:600}
.prices{display:flex;flex-wrap:wrap;gap:8px}
.prices label.f{flex:1 1 200px}
.opts{grid-column:1 / -1;display:flex;flex-wrap:wrap;gap:8px}
.opts label.f{flex:1 1 150px;font-size:11.5px}
pre.proto{margin:0;font:12.5px/1.55 var(--f-mono);white-space:pre-wrap;background:var(--sunk);border-radius:8px;padding:12px;max-height:420px;overflow:auto}
.pro-only{display:none}
body.pro .pro-only{display:flex}
body.pro tr.pro-only{display:table-row}
footer{color:var(--muted);font-size:12.5px;max-width:90ch}
footer p{margin:0 0 6px}
@media (prefers-reduced-motion:no-preference){.meter i{transition:width .35s ease}}
/* ---------- страница сайта ---------- */
.site-head{width:100%;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;max-width:1240px;margin:0 auto 8px}
.site-head a{color:var(--ink);text-decoration:none;font-weight:600}
.site-head nav{display:flex;gap:16px;font-size:14px}
.site-head nav a{color:var(--muted);font-weight:500}
.crumbs{width:100%;font-size:13px;color:var(--muted);max-width:1240px;margin:0 auto 10px}
.crumbs a{color:var(--muted)}
.page-h1{font-family:var(--f-display);font-weight:600;font-size:clamp(22px,3.4vw,34px);line-height:1.15;margin:0 0 8px;text-wrap:balance}
.lead{max-width:75ch;color:var(--ink);margin:0}
.lead b{font-family:var(--f-mono)}
.calc-h{font-size:clamp(18px,2.4vw,24px)}
.toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.ad-slot{min-height:120px;display:flex;align-items:center;justify-content:center}
.ad-slot[hidden]{display:none}
.ad-slot.ph{border:2px dashed var(--line);border-radius:12px;color:var(--muted);font-size:14px;text-align:center;padding:12px;background:repeating-linear-gradient(135deg,transparent 0 12px,var(--sunk) 12px 24px)}
.ad-side{min-height:250px}
.ad-slot.ph small{font-size:12px;opacity:.8}
.seo{max-width:1240px;margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr);gap:20px}
.seo article{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;max-width:none}
.seo h2{font-family:var(--f-display);font-weight:600;font-size:20px;margin:0 0 10px;text-wrap:balance}
.seo h3{font-size:16px;margin:16px 0 6px}
.seo p,.seo li{max-width:75ch}
.seo details{border-bottom:1px solid var(--line);padding:10px 0}
.seo summary{cursor:pointer;font-weight:600}
.cities{columns:3 220px;column-gap:24px;font-size:14px;padding:0;list-style:none}
.cities li{break-inside:avoid;padding:2px 0}
.cities a{color:var(--accent);text-decoration:none}
.region h3{margin:18px 0 6px;font-size:15px}
.site-foot{max-width:1240px;margin:24px auto 0;color:var(--muted);font-size:12.5px}
.print-only{display:none}
@media print{
  :root{--bg:#fff;--surface:#fff;--sunk:#f2f4f6;--ink:#000;--muted:#333;--line:#bbb}
  body{padding:0;font-size:12px}
  .site-head,.crumbs,.ad-slot,.seo,.site-foot,.toolbar,header.top,.grid>.col:first-child,.seg,.btnrow,#cmp,.fix .btn,section[aria-labelledby=h-cost]{display:none!important}
  .print-only{display:block}
  .grid{grid-template-columns:1fr!important}
  .sticky{position:static}
  .pro-only{display:flex!important}
  pre.proto{max-height:none;overflow:visible;white-space:pre-wrap}
  .panel,.verdict{break-inside:avoid;border-color:#bbb}
  .drawing svg{min-width:0}
  #printHead h2{font-size:18px;margin:0 0 4px}
}
.drawbar{display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between}
.drawing{position:relative}
.drawing svg{touch-action:pan-y;cursor:crosshair}
.dtip{position:absolute;z-index:3;pointer-events:none;width:max-content;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:10px;box-shadow:0 6px 20px rgba(0,0,0,.16);padding:8px 10px;font-size:12.5px;line-height:1.45;max-width:min(250px,80vw)}
.dtip>b{display:block;margin-bottom:3px;font-size:13px}
.dtip div span{color:var(--muted);margin-right:6px}
.dnote{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.dnote li{display:flex;gap:10px;align-items:flex-start;font-size:14px;line-height:1.5;padding:10px 12px;border-radius:10px;background:var(--sunk)}
.dnote li>b{flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:12px;color:#fff;background:var(--muted);margin-top:1px}
.dnote li.ok>b{background:var(--ok)} .dnote li.bad>b{background:var(--bad)} .dnote li.warn>b{background:var(--warn)} .dnote li.info>b{background:var(--accent)}
.dnote li.bad{background:var(--bad-bg)}
.legend .hint{flex-basis:100%;font-size:12px}
@media print{.dtip,.drawbar .seg:last-child,.legend .hint{display:none!important}}
.dscale{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.dscale[hidden]{display:none}
.dscale .seg button{font-size:13px;padding:5px 10px}
.pdf-root{position:fixed;left:-12000px;top:0;width:760px;background:#fff;color:#111;font:13px/1.45 var(--f-body);padding:0}
.pdf-blk{padding:10px 4px;background:#fff}
.pdf-blk h3{font:600 12px var(--f-body);text-transform:uppercase;letter-spacing:.07em;color:#555;margin:0 0 8px;border-bottom:1px solid #ddd;padding-bottom:4px}
.pdf-top{display:flex;justify-content:space-between;gap:16px;align-items:flex-end;border-bottom:3px solid var(--accent);padding-bottom:10px}
.pdf-top h1{margin:2px 0;font:600 26px var(--f-display,var(--f-body))}
.pdf-top p{margin:0;color:#444}
.pdf-kicker{font-size:12px;color:var(--accent);font-weight:600}
.pdf-date{text-align:right;color:#555;font-size:12px}
.pdf-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.pdf-grid div{background:#f2f4f6;border-radius:6px;padding:6px 8px}
.pdf-grid span{display:block;font-size:11px;color:#666}
.pdf-t{width:100%;border-collapse:collapse;font-size:12px}
.pdf-t th,.pdf-t td{border-bottom:1px solid #e3e3e3;padding:4px 6px;text-align:left}
.pdf-t th{background:#f2f4f6;font-weight:600}
.pdf-t tr.off td{color:#999}
.pdf-t tfoot td{border-top:2px solid #bbb;border-bottom:0}
.pdf-blk img{display:block;width:100%;height:auto;margin-bottom:8px}
.pdf-blk .legend{margin:4px 0 8px}
.pdf-proto{white-space:pre-wrap;font:11px/1.45 var(--f-mono);margin:0}
.pdf-foot{font-size:11px;color:#666;margin:0;word-break:break-all}
.pdf-blk .verdict{border:1px solid #ddd}
.wsec{display:flex;flex-direction:column;gap:10px;padding:14px;border:1px solid var(--line);border-radius:12px}
.wsub{font-weight:600;font-size:14px;display:flex;flex-wrap:wrap;gap:4px 10px;align-items:baseline}
.wsub span{font-weight:400;font-size:12.5px;color:var(--muted)}
.wrow{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:12px;align-items:end}
.wrow label.f{white-space:nowrap}
.wrow select,.wrow input{width:100%;min-width:0;text-overflow:ellipsis}
.wneed{margin:0;font-size:13.5px;padding:8px 10px;border-radius:8px;background:var(--sunk)}
.wneed span{color:var(--muted);font-size:12.5px}
@media (max-width:480px){.wrow{grid-template-columns:minmax(0,1fr)}}
.csearch{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:8px 0 12px}
.csearch input{flex:1 1 280px;max-width:480px;padding:10px 12px;font-size:15px}
.regions{columns:3 280px;column-gap:16px}
.region{break-inside:avoid;border-bottom:1px solid var(--line);padding:2px 0}
.region summary{cursor:pointer;padding:8px 2px;font-weight:500;font-size:14.5px;list-style:none;display:flex;justify-content:space-between;gap:8px}
.region summary::-webkit-details-marker{display:none}
.region summary::before{content:"▸";color:var(--muted);margin-right:6px;transition:transform .15s}
.region[open] summary::before{transform:rotate(90deg)}
.region summary span{margin-left:auto;color:var(--muted);font:12px var(--f-mono);background:var(--sunk);border-radius:10px;padding:1px 8px}
.region .cities{columns:1;margin:0 0 10px 18px}
.region li[hidden],.region[hidden]{display:none}
.seo details.region{padding:0}
.seo .region summary{padding:6px 2px;font-weight:500;font-size:14px;align-items:center}
.region summary span{line-height:1.5}
.method{width:100%;box-sizing:border-box}
.method summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:8px;font:600 13px var(--f-body);text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}
.method summary::-webkit-details-marker{display:none}
.method summary::before{content:"▸";transition:transform .15s}
.method[open] summary::before{transform:rotate(90deg)}
.method .mbody{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px 24px;margin-top:4px}
.method .mbody p{margin:0;font-size:13.5px;line-height:1.55;color:var(--muted)}
.method .mbody b{display:block;color:var(--ink);font-size:14px;margin-bottom:4px}
@media print{.method{display:none!important}}
.seo,.site-foot{width:100%;box-sizing:border-box}
.steps{position:relative;border:1px solid var(--line);background:var(--surface);border-radius:var(--r);padding:12px 44px 12px 14px}
.steps[hidden]{display:none}
.steps ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.steps li{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;line-height:1.45;color:var(--muted)}
.steps li b{flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:#fff;font:600 12px var(--f-mono)}
.steps em{font-style:normal;font-weight:600;color:var(--ink)}
.steps-x{position:absolute;top:8px;right:8px;width:28px;height:28px;border:0;border-radius:50%;background:transparent;color:var(--muted);font-size:20px;line-height:1;cursor:pointer}
.steps-x:hover{background:var(--sunk);color:var(--ink)}
@media (max-width:900px){.steps ol{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:480px){.steps ol{grid-template-columns:minmax(0,1fr);gap:8px}}
@media print{.steps{display:none!important}}
.guide h3{font-size:16px;margin:18px 0 6px}
.guide ol,.guide ul{padding-left:20px;margin:6px 0}
.guide li{margin:4px 0}
.guide .ex{background:var(--sunk);border-radius:10px;padding:12px 14px;margin-top:10px}
.guide .ex p{margin:4px 0}
/* текстовые блоки внизу — колонка по центру карточки */
.seo article{padding:24px max(20px, calc((100% - 860px)/2))}
.seo p,.seo li{max-width:none}
.seo h2{text-align:center}
.mbar{position:fixed;left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom,0px));z-index:20;display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:14px;color:#fff;text-decoration:none;font-size:13.5px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.mbar[hidden]{display:none}
.mbar.ok{background:var(--ok)} .mbar.bad{background:var(--bad)}
.mbar b{flex:none;width:22px;height:22px;border-radius:50%;background:rgba(255,255,255,.25);display:grid;place-items:center;font-size:12px}
.mbar span{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500}
.mbar i{font-style:normal;font-weight:600;white-space:nowrap}
@media (min-width:901px){.mbar{display:none!important}}
@media print{.mbar{display:none!important}}
.seo a{color:var(--accent);text-underline-offset:3px}
.seo summary{list-style:none;display:flex;gap:8px;align-items:baseline}
.seo summary::-webkit-details-marker{display:none}
.seo details:not(.region) summary::before{content:"+";flex:none;width:18px;color:var(--accent);font:600 16px var(--f-mono)}
.seo details[open]:not(.region) summary::before{content:"−"}
.seo details:not(.region) p{margin:8px 0 4px 26px;color:var(--muted)}
.fb{width:100%;box-sizing:border-box;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px max(20px, calc((100% - 860px)/2))}
.fb-head{text-align:center;margin-bottom:14px}
.fb-head h2{font-family:var(--f-display);font-weight:600;font-size:20px;margin:0 0 6px}
.fb-head p{margin:0;color:var(--muted)}
.fb-form{display:flex;flex-direction:column;gap:12px}
.fb-hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.fb-types{display:flex;flex-wrap:wrap;gap:8px}
.fb-types label{cursor:pointer}
.fb-types input{position:absolute;opacity:0;pointer-events:none}
.fb-types span{display:inline-block;padding:7px 12px;border:1px solid var(--line);border-radius:999px;font-size:13.5px;color:var(--muted);background:var(--sunk)}
.fb-types input:checked + span{background:var(--accent);border-color:var(--accent);color:#fff}
.fb-types input:focus-visible + span{outline:2px solid var(--accent);outline-offset:2px}
.fb-form textarea{width:100%;box-sizing:border-box;resize:vertical;min-height:96px;font:inherit;padding:10px 12px}
.fb-form label.f span{color:var(--muted);font-size:12px}
.fb-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:end}
.fb-att{display:flex;gap:8px;align-items:center;font-size:13.5px;color:var(--muted);padding-bottom:10px;white-space:nowrap}
.fb-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.fb-msg.ok{color:var(--ok);font-weight:600} .fb-msg.err{color:var(--bad)}
.fb-note{margin:0;font-size:12px}
@media (max-width:560px){.fb-row{grid-template-columns:minmax(0,1fr)}.fb-att{padding-bottom:0}}
@media print{.fb{display:none!important}}
.fb-form textarea{color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px}
.fb-form textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.fb-form .lbl{color:var(--muted)} .fb-form .lbl small{font-size:12px;opacity:.85}
.fb-form input[type=checkbox]{width:auto}

/* полоска шагов v2: ровные строки, стрелки между шагами */
.steps{padding:12px 48px 12px 16px}
.steps ol{display:flex;gap:0;align-items:center}
.steps li{flex:1 1 0;align-items:center;gap:10px;min-width:0;position:relative;padding-right:28px}
.steps li:not(:last-child)::after{content:"";position:absolute;right:10px;top:50%;width:8px;height:8px;border-top:2px solid var(--line);border-right:2px solid var(--line);transform:translateY(-50%) rotate(45deg)}
.steps li span{display:flex;flex-direction:column;line-height:1.35;font-size:13px}
.steps em{font-size:14px}
.steps-x{top:50%;transform:translateY(-50%)}
@media (max-width:900px){.steps ol{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 12px}.steps li{padding-right:0}.steps li::after{display:none}}
@media (max-width:480px){.steps{padding:12px 40px 12px 14px}.steps ol{grid-template-columns:minmax(0,1fr)}.steps-x{top:8px;transform:none}}

/* заголовки столбцов слоёв */
.layer.lhead{background:none;padding:0 8px;min-height:0;font-size:11.5px;color:var(--muted);font-weight:500;text-transform:none;letter-spacing:0}
.layer.lhead span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.layer.pro,.layer.lhead.pro{grid-template-columns:20px minmax(0,1fr) 84px 104px auto}
.layer .mm input[data-k=lam],.layer .mm input[data-k=lam0]{padding-right:24px}
.layer.lhead span:last-child{width:94px}
@media (max-width:560px){.layer.lhead{display:none}}

/* λ в простом режиме — только для чтения */
.layer{grid-template-columns:20px minmax(0,1fr) 92px 74px auto}
.layer.pro,.layer.lhead.pro{grid-template-columns:20px minmax(0,1fr) 84px 104px auto}
.lamro{font:13px var(--f-mono);color:var(--muted);text-align:right;padding-right:4px;white-space:nowrap}
.lamro sub{font-size:9px}
@media (max-width:560px){
  .layer{grid-template-columns:20px minmax(0,1fr) auto auto}
  .layer.pro{grid-template-columns:20px minmax(0,1fr) minmax(0,1fr) auto}
  .lamro.isl::before{content:"λ ";opacity:.7}
}

/* строка условий в помещении: ровная сетка */
.crow{grid-template-columns:repeat(6,minmax(0,1fr));align-items:end}
.crow .c-room,.crow .c-zone{grid-column:span 3}
.crow .c-num{grid-column:span 2}
.crow:not(:has(#tbWrap:not([hidden]))) .c-num{grid-column:span 3}
.crow label.f{white-space:nowrap}
.crow label.f small{color:var(--muted);opacity:.8}
.crow select{text-overflow:ellipsis}
@media (max-width:420px){.crow .c-room,.crow .c-zone{grid-column:1/-1}}
body.pro .row.pro-only{display:grid}
[hidden]{display:none!important}
.crow .c-room{grid-column:1/4;grid-row:1}
.crow .c-zone{grid-column:4/7;grid-row:1}
@media (max-width:420px){.crow .c-room,.crow .c-zone{grid-column:1/-1;grid-row:auto}.crow .c-zone{order:5}}
/* λ можно менять в обоих режимах */
.layer,.layer.pro,.layer.lhead,.layer.lhead.pro{grid-template-columns:20px minmax(0,1fr) 84px 104px auto}
.layer .mm.own input{border-color:var(--accent);box-shadow:inset 3px 0 0 var(--accent)}
@media (max-width:560px){.layer,.layer.pro{grid-template-columns:20px minmax(0,1fr) minmax(0,1fr) auto}}
@media (max-width:560px){
  .layer,.layer.pro{grid-template-columns:20px minmax(0,1fr) minmax(0,1fr) auto;row-gap:6px}
  .layer select{grid-column:2/4;grid-row:1}
  .layer .lact{grid-column:4;grid-row:1}
  .layer > span.mm[data-u="мм"]{grid-column:2;grid-row:2}
  .layer > span.mm:not([data-u="мм"]),.layer > .lamro{grid-column:3/5;grid-row:2}
  .layer .sw{grid-row:1/3}
}
@media (max-width:560px){
  .layer,.layer.pro{grid-template-columns:20px minmax(0,1.25fr) minmax(0,.75fr) auto}
  .layer .mm input{padding-left:8px;padding-right:26px}
}
.layer .mm input[type=text]{font-family:var(--f-mono)}