/* ThinkTankPro — /brief/: технологии и производство */

/* ---------- Первый экран: образец под линзой ---------- */
.b-hero{padding-top:clamp(20px,min(5vw,5vh),64px);padding-bottom:clamp(64px,8vw,120px)}
.b-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,5vw,80px);align-items:center;min-height:calc(100svh - var(--header-h) - 80px)}
.b-crumb{color:inherit;text-decoration:none}
.b-crumb:hover{color:var(--ink)}
.b-hero-copy .kicker{margin-bottom:clamp(18px,3vh,30px)}
.b-title{font-weight:600;font-size:clamp(54px,min(7vw,10.8vh),118px);line-height:.9;letter-spacing:-.055em;margin-bottom:clamp(22px,3vh,34px)}
.b-title .outline-text{-webkit-text-stroke-width:1.5px}
.b-hero-copy .lead{margin-bottom:clamp(22px,3vh,32px);max-width:54ch}
.b-offer{display:flex;flex-wrap:wrap;gap:10px;margin-top:clamp(16px,2.2vh,26px)}
.b-offer li{animation:offerIn .9s var(--ease-out) .85s both}
.b-offer li:nth-child(2){animation-delay:.97s}
@keyframes offerIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.b-offer a{white-space:nowrap;display:inline-flex;align-items:center;gap:10px;min-height:44px;padding:6px 16px 6px 8px;border:1px solid var(--rule);border-radius:999px;background:var(--paper-hi);text-decoration:none;font-size:14.5px;color:var(--ink-2);transition:border-color .25s,transform .35s var(--ease-out),background-color .25s}
.b-offer a:hover,.b-offer a:focus-visible{border-color:var(--signal);transform:translateY(-2px);background:#fff}
.b-offer b{display:inline-flex;align-items:center;padding:6px 11px;border-radius:999px;background:var(--signal);color:#fff;font-size:11px;font-weight:700;letter-spacing:.06em}
.b-format .sec-head h2{grid-column:1/-1}
.b-format .sec-head p{grid-column:1/span 7;margin-top:-4px}
.fmt-cta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 14px;margin-top:clamp(30px,4vw,52px)}
.fmt-cta .link{margin-left:10px;color:var(--on-dark)}
.b-hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px 28px}

.lens{position:relative;margin:0}
.lens-frame{position:relative;aspect-ratio:5/4;border-radius:6px;cursor:none;touch-action:pan-y}
.lens-sample{position:absolute;inset:34px 30px 30px 34px;border-radius:4px;overflow:hidden;background:#D8D3C6;box-shadow:inset 0 0 0 1px rgba(18,18,17,.18),0 30px 60px -36px rgba(18,18,17,.55)}
.lens-noise{position:absolute;inset:0;width:100%;height:100%}
.lens-surface{position:absolute;inset:0;width:100%;height:100%}
.lens-micro{position:absolute;inset:34px 30px 30px 34px;width:calc(100% - 64px);height:calc(100% - 64px);border-radius:4px;clip-path:circle(var(--lr,0px) at var(--lx,50%) var(--ly,50%));pointer-events:none}
.lens-ring{position:absolute;left:0;top:0;width:calc(var(--lr,0px) * 2);height:calc(var(--lr,0px) * 2);border-radius:50%;border:2px solid var(--ink);box-shadow:0 0 0 6px rgba(241,239,232,.5),0 18px 40px -10px rgba(18,18,17,.45),inset 0 0 0 1px rgba(255,255,255,.4);transform:translate(calc(var(--lx,50%) + 34px - var(--lr,0px)),calc(var(--ly,50%) + 34px - var(--lr,0px)));pointer-events:none}
.lens-ring::before,.lens-ring::after{content:"";position:absolute;background:var(--signal)}
.lens-ring::before{left:50%;top:-12px;width:1.5px;height:10px}
.lens-ring::after{top:50%;right:-12px;height:1.5px;width:10px}
.lens-scale{position:absolute;right:-6px;bottom:-6px;padding:3px 7px;border-radius:999px;background:var(--ink);color:var(--paper);font-size:10.5px}
.lens-dim{position:absolute;color:var(--ink-2);font-size:11px}
.lens-dim::before{content:"";position:absolute;background:var(--ink-3)}
.lens-dim--w{left:34px;right:30px;top:6px;text-align:center}
.lens-dim--w::before{left:0;right:0;top:20px;height:1px;box-shadow:0 -4px 0 -0 transparent}
.lens-dim--h{top:34px;bottom:30px;left:0;width:24px;writing-mode:vertical-rl;transform:rotate(180deg);text-align:center}
.lens-dim--h::before{top:0;bottom:0;left:-4px;width:1px}
.lens-cap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px 16px;margin-top:12px;padding-left:34px;font-size:11px;color:var(--ink-3)}
.lens-cap span:first-child{color:var(--ink)}
html.is-blueprint .lens-sample{background:transparent;box-shadow:inset 0 0 0 1px var(--ink)}
html.is-blueprint .lens-noise{opacity:.15}

/* ---------- Путь продукта ---------- */
.path-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(32px,5vw,80px)}
.path-stage{position:sticky;top:calc(var(--header-h) + 20px);align-self:start}
.path-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--rule);margin-bottom:14px}
.path-tabs button{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:14px 8px 10px 0;border:0;background:none;text-align:left;font-size:15px;font-weight:600;letter-spacing:-.01em;color:var(--ink-3);transition:color .3s}
.path-tabs button b{font-family:var(--font-mono);font-weight:400;font-size:11px;letter-spacing:.06em}
.path-tabs button::before{content:"";position:absolute;left:0;right:0;top:-1px;height:2px;background:var(--signal);transform:scaleX(0);transform-origin:0 50%;transition:transform .6s var(--ease-out)}
.path-tabs button[aria-selected="true"]{color:var(--ink)}
.path-tabs button[aria-selected="true"] b{color:var(--signal-ink)}
.path-tabs button[aria-selected="true"]::before{transform:none}
.path-figure{margin:0;border:1px solid var(--rule);border-radius:16px;background:var(--paper-hi);overflow:hidden}
.path-svg{width:100%;height:auto}
.path-svg .pg{stroke:var(--grid-line);stroke-width:1}
.path-svg .pm{fill:var(--ink)}
.path-svg text{font-family:var(--font-mono);fill:var(--ink)}
.sv-k{font-size:11px;letter-spacing:.08em;fill:var(--ink-3)!important}
.sv-t{font-family:var(--font-sans)!important;font-size:14px;font-weight:600}
.sv-s{font-size:11px;fill:var(--ink-2)!important}
.sv-on,.sv-on-sig{fill:#fff!important}
.sv-on-sig{font-weight:700}
.sv-line.sv-onsig-line{stroke:#fff}
.sv-box{fill:var(--paper-hi);stroke:var(--ink);stroke-width:1.2}
.sv-ink{fill:var(--ink)}
.sv-ink+text{fill:var(--paper)}
.sv-sig{fill:var(--signal);stroke:var(--signal)}
.sv-line{fill:none;stroke:var(--ink);stroke-width:1.4}
.sv-thick{stroke-width:2.6}
.sv-dash{stroke-dasharray:4 6;stroke:var(--ink-3)}
.sv-sigline{stroke:var(--signal)}
.dots circle{fill:var(--ink-3)}
.dots .hit{fill:var(--signal)}
.b1{fill:var(--ink)}.b2{fill:var(--signal)}.b3{fill:var(--ink-3)}
.window{fill:var(--signal-soft);stroke:var(--signal);stroke-dasharray:4 4}
.probe{fill:var(--signal);stroke:var(--paper-hi);stroke-width:3}
.item{fill:var(--signal)}
.c-on{fill:var(--signal)}.c-mid{fill:var(--ink)}.c-off{fill:none;stroke:var(--ink-3);stroke-width:1.4}
.scene{opacity:0;transition:opacity .5s var(--ease)}
.scene.is-on{opacity:1}
.scene .draw{transition:stroke-dashoffset 1.2s var(--ease-out) .15s}
.scene .dots circle,.scene .cells circle,.scene .bars rect,.scene .line-boxes rect{transform-box:fill-box;transform-origin:center;transform:scale(.4);opacity:0;transition:transform .7s var(--ease-spring),opacity .4s}
.scene.is-on .dots circle,.scene.is-on .cells circle,.scene.is-on .bars rect,.scene.is-on .line-boxes rect{transform:none;opacity:1}
.scene .bars rect{transform-origin:left center;transform:scaleX(0)}
.scene .items{clip-path:inset(0 30px 0 30px)}
.scene.is-on .items rect{animation:belt 1.6s linear infinite}
@keyframes belt{from{transform:translateX(0)}to{transform:translateX(90px)}}
.path-steps{display:flex;flex-direction:column}
.path-step{min-height:72vh;display:flex;flex-direction:column;justify-content:center;gap:16px;padding:32px 0;border-top:1px solid var(--rule);opacity:.32;transition:opacity .5s var(--ease)}
.path-step:first-child{border-top:0}
.path-step.is-active{opacity:1}
.path-n{font-size:11.5px;color:var(--signal-ink)}
.path-step p{color:var(--ink-2);font-size:17px;max-width:44ch}
.path-out{margin-top:6px;padding-top:14px;border-top:1px dashed var(--rule);color:var(--ink)!important;font-weight:600}
.path-out .mono{display:block;font-weight:400;font-size:10.5px;color:var(--ink-3);margin-bottom:6px}

/* ---------- Лист услуг со штампом ---------- */
.b-services{background:var(--paper-lo)}
html.is-blueprint .b-services{background:transparent}
.sheet{position:relative;padding:10px 10px 10px clamp(18px,3vw,40px);border:1px solid var(--ink);background:var(--paper-hi);box-shadow:0 40px 80px -60px rgba(18,18,17,.5)}
.sheet-in{border:2px solid var(--ink);padding:clamp(22px,3vw,40px)}
.sheet-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0}
.svc-group{padding:0 clamp(16px,2vw,28px)}
.svc-group+.svc-group{border-left:1px solid var(--rule)}
.svc-group:first-child{padding-left:0}
.svc-group:last-child{padding-right:0}
.svc-k{font-size:10.5px;color:var(--ink-3);margin-bottom:10px}
.svc-group h3{margin-bottom:22px;min-height:2.3em}
.svc-list li{position:relative;display:grid;grid-template-columns:34px minmax(0,1fr);gap:4px;padding:13px 26px 13px 0;border-top:1px solid var(--rule-2);font-size:15.5px;line-height:1.4}
.svc-list li .mono{font-size:11px;color:var(--ink-3);padding-top:3px}
.svc-list li.is-coord::after{content:"◇";position:absolute;right:2px;top:12px;color:var(--signal-ink);font-size:14px}
.svc-list li{transition:background-color .25s,padding-left .3s var(--ease-out)}
.svc-list li:hover{background:var(--paper)}
.sheet-foot>*{min-width:0}
.sheet-foot{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,560px);gap:clamp(20px,3vw,40px);align-items:end;margin-top:clamp(28px,4vw,48px)}
.sheet-note{display:flex;gap:12px;font-size:14px;line-height:1.55;color:var(--ink-2)}
.sheet-note strong{color:var(--ink)}
.coord-mark{color:var(--signal-ink);font-size:16px;line-height:1.3}
.stamp{width:100%;border-collapse:collapse;font-family:var(--font-mono);font-size:11.5px;color:var(--ink)}
.stamp td{border:1.5px solid var(--ink);padding:6px 8px;height:30px;vertical-align:middle}
.stamp .st-l{font-size:10px;color:var(--ink-3);text-transform:uppercase;letter-spacing:.05em;white-space:nowrap}
.stamp .st-title{font-family:var(--font-sans);font-size:15px;font-weight:600;line-height:1.25;text-align:center;width:42%}
.stamp b{font-size:15px;color:var(--signal-ink)}
.stamp .st-org{font-size:10.5px;text-transform:uppercase;letter-spacing:.05em}

/* ---------- Формат ---------- */
.fmt{border-top:1px solid var(--rule-dark)}
.fmt-step{display:grid;grid-template-columns:120px minmax(0,1fr) auto;gap:clamp(16px,3vw,40px);align-items:center;padding:clamp(22px,3vw,36px) 0;border-bottom:1px solid var(--rule-dark);transition:background-color .3s,padding-left .5s var(--ease-out)}
.fmt-n{font-size:clamp(48px,6vw,92px);font-weight:600;letter-spacing:-.06em;line-height:.8;color:transparent;-webkit-text-stroke:1.2px var(--on-dark-2);transition:color .4s,-webkit-text-stroke-color .4s}
.fmt-step h3{color:var(--on-dark);margin-bottom:6px}
.fmt-step p{color:var(--on-dark-2);max-width:56ch}
.fmt-tag{padding:6px 12px;border:1px solid var(--rule-dark);border-radius:999px;font-size:11px;color:var(--on-dark);white-space:nowrap}
.fmt-step:hover{padding-left:14px}
.fmt-step:hover .fmt-n{color:var(--signal);-webkit-text-stroke-color:var(--signal)}

/* ---------- Опыт (4 бирки) ---------- */
.tags--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- Опросники ---------- */
.qmain{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;align-items:stretch}
.qexamples{padding:clamp(22px,3vw,36px);border:1px solid var(--rule);border-radius:22px;background:var(--paper-hi)}
.qexamples-k{display:block;margin-bottom:14px;font-size:11px;color:var(--signal-ink)}
.qcards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.qcard{position:relative;display:flex;flex-direction:column;gap:14px;padding:clamp(22px,3vw,36px);border:1px solid var(--rule);border-radius:22px;background:var(--paper-hi);text-decoration:none;overflow:hidden;transition:transform .6s var(--ease-out),box-shadow .5s,border-color .3s,opacity .9s var(--ease-out) var(--d,0s)}
.qcard:hover{transform:translateY(-6px);box-shadow:0 40px 70px -40px rgba(18,18,17,.45);border-color:var(--ink)}
.qcard-k{font-size:11px;color:var(--signal-ink)}
.qcard-art{width:100%;height:auto;margin:6px 0 4px;overflow:visible}
.qcard-title{font-size:clamp(30px,3.4vw,52px);font-weight:600;letter-spacing:-.045em;line-height:1}
.qcard-text{color:var(--ink-2);font-size:16px;max-width:46ch}
.qcard-go{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:18px;border-top:1px solid var(--rule);font-weight:600}
.qcard-go .arr{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--ink);color:var(--paper);transition:transform .4s var(--ease-out),background-color .3s}
.qcard:hover .qcard-go .arr{transform:rotate(-45deg);background:var(--signal)}
.brick-strip rect{fill:var(--paper-lo);stroke:var(--ink);stroke-width:1}
.brick-strip rect.alt{fill:var(--signal-soft)}
.brick-strip rect.hot{fill:var(--signal);stroke:var(--signal)}
.part .p-face{fill:var(--paper);stroke:var(--ink);stroke-width:1.4}
.part .p-top{fill:var(--paper-lo);stroke:var(--ink);stroke-width:1.4}
.part .p-edge{fill:none;stroke:var(--ink);stroke-width:1.4}
.part .p-hole{fill:var(--paper-hi);stroke:var(--signal);stroke-width:2}
.part .p-dim{fill:none;stroke:var(--signal);stroke-width:1;stroke-dasharray:3 3}
.part .p-txt{font:400 12px var(--font-mono);fill:var(--signal-ink)}
.part .p-lines{fill:none;stroke:var(--ink-3);stroke-width:6;stroke-linecap:round;stroke-dasharray:120;stroke-dashoffset:120;transition:stroke-dashoffset .9s var(--ease-out)}
.qcard:hover .part .p-lines,.qcard:focus-visible .part .p-lines,.qcard.is-in .part .p-lines{stroke-dashoffset:0}
.part{transform-box:fill-box;transform-origin:center;transition:transform .9s var(--ease-spring)}
.qcard:hover .part{transform:rotate(-3deg) translateY(-4px)}
.qrow-k{display:flex;align-items:center;gap:12px;margin:clamp(30px,4vw,48px) 0 14px;font-size:12px;color:var(--ink-2)}
.qrow-k::before{content:"";width:28px;height:1px;background:currentColor;opacity:.6}
.cat-head+.qrow-k{margin-top:0}
.web .w-win{fill:var(--paper);stroke:var(--ink);stroke-width:1.4}
.web .w-bar{fill:none;stroke:var(--ink);stroke-width:1.4}
.web .w-dot{fill:var(--ink-3)}
.web .w-dot.hot{fill:var(--signal)}
.web .w-block{fill:var(--paper-lo);stroke:var(--ink);stroke-width:1.2}
.web .w-block.alt{fill:var(--signal-soft)}
.web .w-line{fill:none;stroke:var(--ink-3);stroke-width:6;stroke-linecap:round;stroke-dasharray:170;stroke-dashoffset:170;transition:stroke-dashoffset .9s var(--ease-out)}
.web .w-flow{fill:none;stroke:var(--signal);stroke-width:1.6;stroke-dasharray:4 4}
.web .w-node{fill:var(--paper-hi);stroke:var(--ink);stroke-width:1.4}
.web .w-txt{font:400 12px var(--font-mono);fill:var(--ink-2)}
.qcard:hover .web .w-line,.qcard:focus-visible .web .w-line,.qcard.is-in .web .w-line{stroke-dashoffset:0}
.qcard .web{transition:transform .6s var(--ease-out)}
.qcard:hover .web{transform:translateY(-4px)}
.qnote{margin-top:28px;color:var(--ink-2);display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center}

/* ---------- Адаптив ---------- */
@media (max-width:1100px){
  .tags--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1000px){
  .b-hero-grid{grid-template-columns:1fr;min-height:0}
  .lens{max-width:640px}
  .path-grid{grid-template-columns:1fr}
  .path-stage{position:relative;top:0}
  .path-step{min-height:0;padding:22px 0 0;border-top:0;opacity:1}
  .path-step[hidden]{display:none}
  .sheet-cols{grid-template-columns:1fr}
  .svc-group{padding:0!important}
  .svc-group+.svc-group{border-left:0;margin-top:30px}
  .sheet-foot{grid-template-columns:1fr}
  .qcards,.qmain{grid-template-columns:1fr}
}
@media (max-width:620px){
  .lens-frame{aspect-ratio:1}
  .lens-sample,.lens-micro{inset:28px 6px 6px 28px}
  .lens-micro{width:calc(100% - 34px);height:calc(100% - 34px)}
  .lens-dim--w{left:28px;right:6px}
  .lens-dim--h{top:28px;bottom:6px}
  .lens-cap{padding-left:0}
  .path-tabs button{font-size:12.5px;padding-right:4px}
  .fmt-step{grid-template-columns:56px minmax(0,1fr);row-gap:12px}
  .fmt-tag{grid-column:2;justify-self:start}
  .tags--4{grid-template-columns:1fr}
  .stamp{font-size:10px;table-layout:fixed}
  .stamp td{padding:5px 5px;overflow-wrap:anywhere}
  .stamp .st-l{white-space:normal;font-size:8.5px;letter-spacing:0}
  .stamp .st-title{font-size:12.5px;width:36%}
  .stamp .st-org{font-size:9px}
}
@media (prefers-reduced-motion:reduce){
  .b-offer li{animation:none}
  .scene .draw{transition:none}
  .scene.is-on .items rect{animation:none}
}
@media (max-width:1000px){.b-format .sec-head p{grid-column:1/-1}}