/* Robotsforthat Build: tokens from the Robotsforthat Build design system. Everything is scoped under .bld */
.bld{
  --b-ground:var(--bg);--b-surface:var(--panel);--b-ph:var(--bg-2);--b-line:var(--line);--b-line2:var(--line-strong);
  --b-ink:var(--ink);--b-ink2:var(--ink-2);--b-muted:var(--muted);
  --b-brand:var(--accent);--b-on-brand:var(--accent-ink);--b-soft:var(--accent);--b-tint:var(--accent-soft);--b-tint-ink:var(--accent);
  --b-teal:var(--accent);--b-ok:var(--accent-soft);--b-ok-ink:var(--accent);--b-night:var(--panel);--b-on-night:var(--ink);--b-on-night2:var(--ink-2);
  --b-display:var(--display);--b-body:var(--body);
  background:var(--b-ground);color:var(--b-ink);font:16px/1.55 var(--b-body);padding:8px 0 64px;
}
.bld *{box-sizing:border-box}
.bld h1,.bld h2,.bld h3{font-family:var(--b-display);color:var(--b-ink);text-wrap:balance;margin:0}
.bld h1{font-weight:700;font-size:clamp(36px,5.4vw,64px);line-height:1.02;letter-spacing:-.01em;text-transform:uppercase}
.bld h2{font-weight:700;font-size:clamp(24px,3vw,34px);line-height:1.1;text-transform:uppercase}
.bld h3{font-weight:700;font-size:20px;line-height:1.25}
.bld a{color:var(--b-teal)}
.bld p{margin:0}
.b-wrap{max-width:1180px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:20px}
.b-muted{color:var(--b-muted)}
.b-lead{font-size:clamp(17px,2vw,20px);color:var(--b-ink2);max-width:38ch}
.b-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.b-eyebrow{display:block;font:700 12.5px var(--b-body);letter-spacing:.07em;text-transform:uppercase;color:var(--b-tint-ink)}
.b-eyebrow.on-night{color:var(--b-soft)}
.b-badge{display:inline-flex;align-items:center;align-self:flex-start;padding:6px 12px;border-radius:999px;font:700 13px var(--b-body)}
.b-friendly{background:var(--b-tint);color:var(--b-tint-ink)}
.b-ok{background:var(--b-ok);color:var(--b-ok-ink)}
.b-meta{background:var(--b-surface);color:var(--b-muted);border:1px solid var(--b-line);font-weight:600}
.b-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:14px;font:700 16px var(--b-body);text-decoration:none;border:0;cursor:pointer;white-space:nowrap}
.bld .b-btn-p{background:var(--b-brand);color:var(--b-on-brand)}
.bld .b-btn-s{background:transparent;color:var(--b-ink);border:1px solid var(--b-line2)}
.bld .b-btn-g{background:transparent;color:var(--b-ink);padding:0 8px;font-weight:600}
.bld .b-btn-club{background:var(--b-soft);color:var(--accent-ink)}
.b-btn:focus-visible,.bld a:focus-visible,.bld input:focus-visible,.bld summary:focus-visible{outline:2px solid var(--b-brand);outline-offset:2px}
.b-btn[disabled]{opacity:.45;cursor:default}
.b-center{margin:18px auto 0;display:flex;width:max-content;max-width:100%}
.b-crumbs{font-size:14px;color:var(--b-muted)}.b-crumbs a{color:var(--b-muted)}.b-crumbs b{color:var(--b-ink);font-weight:600}.b-crumbs span{margin:0 4px}
/* hero */
.b-hero{display:flex;flex-wrap:wrap;gap:36px;align-items:center;padding-top:32px}
.b-hero-text{flex:1 1 440px;min-width:0;display:flex;flex-direction:column;gap:18px}
.b-proof{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 22px;color:var(--b-muted);font-size:14px}.b-proof b{color:var(--b-ink)}
.b-steps-card,.b-path-card{flex:1 1 380px;min-width:0;background:var(--b-surface);border:1px solid var(--b-line);border-radius:24px;padding:22px}
.b-steps-card ol,.b-path-card ol{list-style:none;margin:0;padding:0;display:grid;gap:10px;counter-reset:s}
.b-steps-card li,.b-path-card li{counter-increment:s;display:grid;grid-template-columns:36px minmax(0,1fr);gap:2px 12px;align-items:start;padding:10px;border-radius:14px}
.b-steps-card li::before,.b-path-card li::before{content:counter(s);grid-row:span 2;width:32px;height:32px;border-radius:10px;display:grid;place-items:center;font:800 16px var(--b-display);background:var(--b-tint);color:var(--b-tint-ink)}
.b-path-card li::before{content:counter(s)}
.b-path-card li.b-0::before{content:"0"}
.b-steps-card li span,.b-path-card li span{color:var(--b-muted);font-size:14px}
.b-steps-card .b-night-li{background:var(--b-night)}.b-steps-card .b-night-li b{color:var(--b-on-night)}.b-steps-card .b-night-li span{color:var(--b-on-night2)}.b-steps-card .b-night-li::before{background:var(--b-soft);color:var(--accent-ink)}
.b-path-card .b-eyebrow{margin-bottom:10px}
.b-photo{flex:1 1 420px;min-width:0;margin:0;border-radius:28px;overflow:hidden;background:var(--b-ph);border:1px solid var(--b-line)}.b-photo img{display:block;width:100%;height:auto}
.b-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.b-facts div{background:var(--b-surface);border:1px solid var(--b-line);border-radius:14px;padding:12px 14px}.b-facts span{display:block;font-size:13px;color:var(--b-muted)}.b-facts b{font-size:18px}
.b-age{font-size:14px}
/* sections */
.b-sec-h{display:flex;flex-wrap:wrap;gap:6px 18px;align-items:baseline;justify-content:space-between;margin-bottom:14px}
.b-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.b-card{background:var(--b-surface);border:1px solid var(--b-line);border-radius:18px;padding:18px;display:flex;flex-direction:column;gap:6px}.b-card b{font-size:17px}.b-card p{color:var(--b-muted);font-size:15px}
.b-dash{background:transparent;border-style:dashed;border-color:var(--b-line2)}
.b-buy{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:12px;background:var(--b-surface);border:1px solid var(--b-line);border-radius:18px;padding:16px 18px}.b-buy b{display:block}.b-buy span{color:var(--b-muted);font-size:14px}
.b-kits{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.b-kit{display:flex;flex-direction:column;gap:6px;background:var(--b-surface);border:1px solid var(--b-line);border-radius:18px;padding:18px;text-decoration:none;color:var(--b-ink)}
.bld .b-kit{color:var(--b-ink)}.b-kit:hover{border-color:var(--b-line2)}.b-kit b{font-size:18px;line-height:1.25}
.b-kit-line{color:var(--b-muted);font-size:14.5px}.b-kit-meta{color:var(--b-teal);font-size:13px;font-weight:700}.b-kit-go{margin-top:auto;padding-top:6px;font-weight:700;font-size:14px;color:var(--b-tint-ink)}
.b-guides{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px}
.b-guide{display:flex;flex-direction:column;gap:4px;background:var(--b-surface);border:1px solid var(--b-line);border-radius:16px;padding:16px;text-decoration:none}.bld .b-guide b{color:var(--b-ink)}.b-guide span{color:var(--b-muted);font-size:14px}
.b-phases{display:grid;gap:10px}
.b-phase{background:var(--b-surface);border:1px solid var(--b-line);border-radius:16px;padding:4px 16px}
.b-phase summary{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center;padding:12px 0;cursor:pointer;list-style:none}.b-phase summary::-webkit-details-marker{display:none}
.b-ph-n{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:var(--b-tint);color:var(--b-tint-ink);font:800 14px var(--b-display)}
.b-phase ol{margin:0 0 14px;padding-left:22px;color:var(--b-ink2);display:grid;gap:4px}
/* night panels */
.b-night{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;background:var(--b-night);border-radius:24px;padding:30px}
.b-night>div{flex:1 1 460px;min-width:0;display:flex;flex-direction:column;gap:8px}
.bld .b-night h2{color:var(--b-on-night)}.b-night p,.b-night li span{color:var(--b-on-night2)}.b-night li b{color:var(--b-on-night)}
.b-night ul{margin:6px 0 0;padding-left:18px;display:grid;gap:6px}
.b-mail{font-size:17px}.b-mail b{color:var(--b-on-night)}
.b-small-band p{color:var(--b-muted);text-align:center}
.b-own{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;background:var(--b-tint);border-radius:22px;padding:22px 24px}.b-own>div{flex:1 1 380px}.b-own b{font:800 22px var(--b-display)}.b-own p{color:var(--b-ink2)}
.b-form{display:flex;flex-wrap:wrap;gap:8px;flex:1 1 320px;max-width:480px}
.b-form input{flex:1 1 200px;min-width:0;min-height:48px;border-radius:12px;border:1px solid var(--b-line2);background:var(--b-surface);color:var(--b-ink);padding:0 14px;font:inherit}
.b-form-done{font-weight:700;color:var(--b-ok-ink)}
.b-src{color:var(--b-muted);font-size:14.5px}.b-src h2{font-size:20px;margin-bottom:6px}.b-src ul{padding-left:18px}.b-credit{margin-top:8px;font-size:13.5px}
/* finder */
.b-finder{display:flex;flex-wrap:wrap;gap:20px;align-items:flex-start;background:var(--b-surface);border:1px solid var(--b-line);border-radius:24px;padding:24px}
.b-finder-q{flex:999 1 520px;min-width:0;display:flex;flex-direction:column;gap:16px}
.b-finder-r{flex:1 1 320px;min-width:0;display:flex;flex-direction:column;gap:10px}
.b-q{border:0;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.b-q legend{display:flex;gap:10px;align-items:center;font-weight:700;font-size:17px;margin-bottom:8px;padding:0}
.b-q legend span{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;background:var(--b-tint);color:var(--b-tint-ink);font:800 13px var(--b-display)}
.b-opts{display:flex;flex-wrap:wrap;gap:8px}
.b-opt{position:relative;cursor:pointer}.b-opt input{position:absolute;opacity:0;pointer-events:none}
.b-opt span{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border-radius:999px;border:1px solid var(--b-line2);background:var(--b-ground);font-weight:600;font-size:15px}
.b-opt input:checked+span{background:var(--b-brand);border-color:var(--b-brand);color:var(--b-on-brand)}
.b-opt input:focus-visible+span{outline:2px solid var(--b-brand);outline-offset:2px}
.b-res{display:flex;flex-direction:column;gap:6px;border:1px solid var(--b-line);border-radius:16px;padding:14px;text-decoration:none;color:var(--b-ink);background:var(--b-ground)}
.bld .b-res{color:var(--b-ink)}.b-res.top{border:2px solid var(--b-brand)}
/* guides */
.b-article{max-width:780px;display:flex;flex-direction:column;gap:14px}
.b-article p{font-size:17px;color:var(--b-ink2)}.b-article h2{margin-top:22px}.b-article h3{margin-top:10px}
.b-article>.b-btn{align-self:flex-start}
.b-glist{display:grid;gap:10px}
.b-gkit{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;background:var(--b-surface);border:1px solid var(--b-line);border-radius:16px;padding:14px 16px}.b-gkit>div{flex:1 1 300px;min-width:0;display:flex;flex-direction:column;gap:2px}.b-gkit p{font-size:15px}
/* club */
.b-club-hero{display:flex;flex-direction:column;gap:14px;align-items:flex-start;padding-top:36px}
.b-plans{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.b-plan{background:var(--b-surface);border:1px solid var(--b-line);border-radius:24px;padding:26px;display:flex;flex-direction:column;gap:12px}
.b-plan ul{margin:0;padding-left:20px;color:var(--b-ink2);display:grid;gap:6px}
.b-plan-club{background:var(--b-night);border-color:var(--b-night)}.bld .b-plan-club h2{color:var(--b-on-night)}.b-plan-club ul{color:var(--b-on-night2)}.b-plan-club .b-price{color:var(--b-on-night)}
.b-plan-h{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.b-club-badge{background:var(--b-soft);color:var(--accent-ink)}
.b-price{font:800 36px var(--b-display)}.b-price span{font:500 15px var(--b-body);color:var(--b-muted);margin-left:6px}.b-plan-club .b-price span{color:var(--b-on-night2)}
.b-plan .b-btn{align-self:flex-start}
.b-plan-club .b-form input{background:#22252D;border-color:#4B5060;color:#fff}
.b-fine{font-size:13px;color:var(--b-on-night2)}
.b-faq{display:flex;flex-direction:column;gap:8px;max-width:780px}.b-faq p{color:var(--b-ink2)}
/* build app */
.b-app{padding:0}
.b-top{position:sticky;top:0;z-index:5;background:var(--b-surface);border-bottom:1px solid var(--b-line)}
.b-top .b-wrap{display:flex;flex-direction:column;gap:8px;padding-block:10px}
.b-top-row{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:14px}
.b-top-row a{color:var(--b-muted);text-decoration:none}
.b-who{display:inline-flex;align-items:center;gap:6px;background:var(--b-ground);border:1px solid var(--b-line);border-radius:999px;padding:4px 10px;font:600 13.5px var(--b-body);color:var(--b-ink);cursor:pointer;min-height:36px}
.b-bars{display:flex;gap:4px}.b-bars i{display:block;height:6px;border-radius:6px;background:var(--b-line);flex:1 1 0;overflow:hidden}.b-bars i.cur{flex:4 1 0}.b-bars i b{display:block;height:100%;background:var(--b-teal)}.b-bars i.cur b{background:var(--b-brand)}
.b-phase-l{font:700 12.5px var(--b-body);letter-spacing:.06em;text-transform:uppercase;color:var(--b-brand)}
.b-screen{display:flex;flex-wrap:wrap;gap:24px;align-items:flex-start;padding-top:22px}
.b-shot{flex:999 1 460px;min-width:0;display:flex;flex-direction:column;gap:12px}
.b-img-empty{height:min(34vh,300px);width:100%;border-radius:20px;border:2px dashed var(--b-line);background:var(--b-ph);display:flex;align-items:center;justify-content:center;color:var(--b-muted,#78716c);font-size:15px;font-weight:600}
.b-shot img{display:block;width:100%;height:auto;border-radius:20px;border:1px solid var(--b-line);background:var(--b-ph)}
.b-ref{background:var(--b-surface);border:2px solid var(--b-soft);border-radius:20px;padding:22px;display:flex;flex-direction:column;gap:6px}
.b-ref span{font:700 12.5px var(--b-body);letter-spacing:.06em;text-transform:uppercase;color:var(--b-tint-ink)}.b-ref b{font:800 clamp(26px,4vw,40px)/1.05 var(--b-display)}.b-ref p{color:var(--b-muted);font-size:15px}
.b-uses{display:flex;flex-wrap:wrap;gap:6px}.b-uses span{background:var(--b-surface);border:1px solid var(--b-line);border-radius:999px;padding:4px 11px;font-size:13.5px;color:var(--b-ink2)}
.b-side{flex:1 1 360px;min-width:0;display:flex;flex-direction:column;gap:14px;padding-bottom:110px}
.bld .b-title{font-weight:800;font-size:clamp(28px,4vw,40px);line-height:1.05}.b-win .b-title{font-size:clamp(36px,5vw,56px)}
.b-d{font-size:18px;color:var(--b-ink2)}
.b-tip{background:var(--b-tint);color:var(--b-tint-ink);border-radius:14px;padding:12px 14px;font-size:15px}
.b-see{margin:0;border:1px solid var(--b-ok-ink);background:var(--b-ok);border-radius:16px;padding:12px 16px;display:flex;flex-direction:column;gap:10px}
.b-see legend{padding:0 6px;font:700 12.5px var(--b-body);letter-spacing:.06em;text-transform:uppercase;color:var(--b-ok-ink)}
.b-see label{display:flex;gap:12px;align-items:center;font-size:16.5px;min-height:32px;cursor:pointer;color:var(--b-ink)}
.b-see input{width:22px;height:22px;accent-color:var(--accent);flex:none}
.b-nosee{align-self:flex-start;background:none;border:0;padding:4px 0;color:var(--b-tint-ink);font:700 15px var(--b-body);text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.b-help{border:1px solid var(--b-soft);background:var(--b-surface);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:10px}
.b-help h2{font-size:20px}.b-help ul{margin:0;padding-left:20px;color:var(--b-ink2);display:grid;gap:4px}
.b-coach{display:flex;flex-direction:column;gap:8px;border-top:1px solid var(--b-line);padding-top:12px}
.b-coach textarea{min-height:70px;border-radius:12px;border:1px solid var(--b-line2);background:var(--b-ground);color:var(--b-ink);padding:10px 12px;font:inherit;resize:vertical}
.b-file{display:inline-flex;align-items:center;gap:10px;flex-wrap:wrap}.b-file input{max-width:100%}
.b-preview{max-width:180px;border-radius:12px;border:1px solid var(--b-line)}
.b-ans{white-space:pre-wrap;background:var(--b-ok);color:var(--b-ink);border-radius:12px;padding:12px;font-size:15.5px}
.b-nav{position:fixed;left:0;right:0;bottom:0;z-index:20;background:var(--b-surface);border-top:1px solid var(--b-line);padding:12px max(16px,env(safe-area-inset-right,0px)) max(14px,env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px))}
.b-nav>div{max-width:1180px;margin:0 auto;display:flex;gap:10px;align-items:center}
.b-nav .b-btn{min-height:50px}.b-nav .b-next{flex:1;max-width:420px;margin-left:auto}
.b-nav .b-stuck{color:var(--b-tint-ink);border-color:var(--b-soft)}
.b-win{display:flex;flex-direction:column;gap:16px;padding-top:28px;padding-bottom:120px}
.b-win .b-night{margin-top:6px}
.b-profiles{display:flex;flex-direction:column;gap:10px;background:var(--b-surface);border:1px solid var(--b-line);border-radius:16px;padding:16px;margin-top:10px}
.b-profiles .b-row{gap:8px}
.b-pchip{min-height:40px;padding:0 14px;border-radius:999px;border:1px solid var(--b-line2);background:var(--b-ground);color:var(--b-ink);font:600 14px var(--b-body);cursor:pointer}.b-pchip[aria-pressed="true"]{background:var(--b-brand);border-color:var(--b-brand);color:var(--b-on-brand)}
@media (max-width:860px){.b-3{grid-template-columns:1fr}.b-plans{grid-template-columns:1fr}.b-facts b{font-size:15px}.b-hero{padding-top:12px}.b-nav .b-btn{padding:0 14px}}
@media (prefers-reduced-motion:reduce){.bld *{transition:none!important;animation:none!important}}
.b-path-card li.b-0{counter-increment:none}

/* coach thread, fix library, badges, projects, family */
.b-input{min-height:44px;border-radius:10px;border:1px solid var(--b-line2);padding:0 12px;font:inherit;background:var(--b-ground);color:var(--b-ink);flex:1 1 180px;min-width:0}
.b-thread{display:flex;flex-direction:column;gap:8px}
.b-msg{max-width:92%;padding:10px 12px;border-radius:14px;font-size:15.5px;white-space:pre-wrap;display:flex;flex-direction:column;gap:8px}
.b-msg.you{align-self:flex-end;background:var(--b-ground);border:1px solid var(--b-line)}
.b-msg.you img{max-width:200px;border-radius:10px}
.b-msg.coach{align-self:flex-start;background:var(--b-ok);color:var(--b-ink)}
.b-verdict{align-self:flex-start;font:700 12.5px var(--b-body);letter-spacing:.05em;text-transform:uppercase;padding:4px 10px;border-radius:999px;white-space:normal}
.b-verdict.ok{background:var(--b-ok-ink);color:var(--b-ok)}.b-verdict.fix{background:var(--b-brand);color:var(--b-on-brand)}.b-verdict.unk{background:var(--b-line2);color:var(--b-ink)}
.b-worked{align-self:flex-start;min-height:40px;border-radius:10px;border:1px solid var(--b-ok-ink);background:var(--b-surface);color:var(--b-ok-ink);font:700 14px var(--b-body);padding:0 12px;cursor:pointer;white-space:normal}
.b-saved{font:700 13.5px var(--b-body);color:var(--b-ok-ink);white-space:normal}
.b-lib{background:var(--b-ok);border-radius:12px;padding:12px 14px}.b-lib ul{margin:6px 0 0}
.b-medal-big{display:flex;flex-direction:column;gap:10px;align-items:flex-start;background:var(--b-night);border-radius:22px;padding:24px;max-width:560px}
.b-medal-big span{font:700 12.5px var(--b-body);letter-spacing:.07em;text-transform:uppercase;color:var(--b-soft)}.b-medal-big b{font:800 clamp(26px,4vw,36px)/1.1 var(--b-display);color:var(--b-on-night)}
.b-medal-big.pop{animation:b-pop .5s cubic-bezier(.2,.8,.2,1)}@keyframes b-pop{from{transform:scale(.92);opacity:.4}}
.b-projects{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.b-project{display:flex;flex-direction:column;gap:4px;background:var(--b-surface);border:1px solid var(--b-line);border-radius:16px;padding:16px;text-decoration:none}.bld .b-project b{color:var(--b-ink);font-size:17px}.b-project:hover{border-color:var(--b-line2)}
.b-fams{display:grid;gap:16px}
.b-fam{background:var(--b-surface);border:1px solid var(--b-line);border-radius:20px;padding:20px;display:flex;flex-direction:column;gap:12px}
.b-badges{display:flex;flex-wrap:wrap;gap:8px}
.b-medal{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border-radius:999px;background:var(--b-night);color:var(--b-soft);font:700 13.5px var(--b-body)}.b-medal::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--b-soft)}
.b-fam-kit{display:flex;flex-direction:column;gap:8px;border-top:1px solid var(--b-line);padding-top:12px}.b-fam-kit .b-btn{align-self:flex-start;min-height:42px}
@media (prefers-reduced-motion:reduce){.b-medal-big.pop{animation:none}}
/* buy, wait, unbox */
.b-flow{display:flex;flex-direction:column;gap:16px;max-width:760px}
.b-flow h1{font-size:clamp(30px,4.6vw,48px)}
.b-store{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;background:var(--b-surface);border:2px solid var(--b-brand);border-radius:18px;padding:18px}.b-store div{display:flex;flex-direction:column;gap:2px}.b-store b{font-size:18px}.b-store span{color:var(--b-muted);font-size:15px}
.b-count h1{color:var(--b-on-night)}.b-count p{color:var(--b-on-night2)}
.b-checks{display:flex;flex-direction:column;gap:8px}
.b-check{display:flex;gap:12px;align-items:center;min-height:52px;background:var(--b-surface);border:1px solid var(--b-line);border-radius:14px;padding:10px 14px;font-weight:600;cursor:pointer}.b-check input{width:22px;height:22px;accent-color:var(--b-brand);flex:none}
.b-quiz summary{cursor:pointer;font-weight:600;min-height:28px}.b-quiz[open] summary{margin-bottom:6px}
.b-parts{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.b-part{display:flex;flex-direction:column;gap:4px;align-items:flex-start;text-align:left;background:var(--b-surface);border:1px solid var(--b-line);border-radius:14px;padding:14px;font:inherit;color:var(--b-ink);cursor:pointer;min-height:96px}
.b-part[aria-pressed="true"]{border:2px solid var(--b-teal);background:var(--b-ok)}
.b-part-ok{display:none;font-weight:700;font-size:13px;color:var(--b-ok-ink)}.b-part[aria-pressed="true"] .b-part-ok{display:block}
/* club */
.b-join{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;align-items:start}
.b-table-wrap{overflow-x:auto;background:var(--b-surface);border:1px solid var(--b-line);border-radius:24px;padding:10px 18px}
.b-compare{width:100%;border-collapse:collapse;font-size:15px}.b-compare th,.b-compare td{text-align:left;padding:12px 8px;border-bottom:1px solid var(--b-line)}.b-compare tr:last-child th,.b-compare tr:last-child td{border-bottom:0}.b-compare thead th{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--b-muted)}.b-compare td:last-child{font-weight:700;color:var(--b-tint-ink)}
.b-lock{display:flex;flex-direction:column;gap:8px;align-items:flex-start;background:var(--b-tint);border-radius:18px;padding:18px;margin-top:12px}.b-lock b{font-size:17px}.b-lock p{color:var(--b-ink2)}
.b-project.b-locked{opacity:.8;border-style:dashed}.b-lock-t{font-weight:700;font-size:13px;color:var(--b-muted)}
/* my robots */
.b-me{display:flex;flex-direction:column;gap:18px}
.b-me-top{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.b-me-top .b-pchip{margin-left:auto}
.b-who-pick{display:flex;flex-direction:column;gap:10px}.b-who-pick h2{font-size:22px}
.b-resume h2{color:var(--b-on-night)}.b-resume p{color:var(--b-on-night2)}.b-resume .b-bars{min-width:220px;margin-top:8px}
.b-project.b-new{border:2px solid var(--b-soft)}
.b-me-links{display:flex;flex-wrap:wrap;gap:10px}
.b-search{width:100%;margin-bottom:14px}
.b-fixlist{display:flex;flex-direction:column;gap:10px}
.b-fix{background:var(--b-surface);border:1px solid var(--b-line);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:6px}.b-fix p{color:var(--b-ink2)}
.b-ok-t{font-weight:700;font-size:13px;color:var(--b-ok-ink)}
.b-card .b-form,.b-plan .b-form,.b-me .b-form,.b-club-hero .b-form{flex:0 0 auto;width:100%}
.b-plan-club .b-muted{color:#D6D8DD}.b-plan-club h2{color:#fff}
/* robot kit guides */
.b-guide-hero{display:flex;flex-direction:column;gap:14px;max-width:900px}
.b-guide-hero h1{font-size:clamp(32px,5vw,56px)}
.b-answer{background:var(--b-surface);border:1px solid var(--b-line);border-left-width:1px;border-radius:18px;padding:18px;display:flex;flex-direction:column;gap:6px}.b-answer p{font-size:17px}
.b-top3{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;counter-reset:t}
.b-top3 li{counter-increment:t}.b-top3 a{display:flex;flex-direction:column;gap:2px;background:var(--b-surface);border:1px solid var(--b-line);border-radius:14px;padding:14px;text-decoration:none;color:var(--b-ink)}.b-top3 a::before{content:"#" counter(t);font-weight:800;color:var(--b-tint-ink);font-size:13px}.b-top3 span{color:var(--b-muted);font-size:14px}
.b-picks{display:flex;flex-direction:column;gap:14px}
.b-pick{background:var(--b-surface);border:1px solid var(--b-line);border-radius:20px;padding:20px;display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.b-pick-h{display:flex;gap:12px;align-items:flex-start}.b-pick-n{width:36px;height:36px;border-radius:999px;background:var(--b-brand);color:var(--b-on-brand);display:flex;align-items:center;justify-content:center;font-weight:800;flex:none}.b-pick h3{font-size:21px}
.b-learns{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.b-learns span{font-size:13px;font-weight:700;color:var(--b-muted);margin-right:4px}.b-learns b{font-size:13px;font-weight:600;background:var(--b-tint);color:var(--b-tint-ink);border-radius:999px;padding:4px 10px}
.b-skip{font-size:14px}
.b-learn{align-items:flex-start}.b-learn h2{color:var(--b-on-night)}.b-learn p,.b-learn li{color:var(--b-on-night2)}.b-learn ul{margin:10px 0 0;padding-left:20px;display:flex;flex-direction:column;gap:4px}
.b-learn .b-form input{background:#22252D;border-color:#4B5060;color:#fff}
.b-alert{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;background:var(--b-tint);border-radius:20px;padding:20px}.b-alert b{font-size:18px}
.b-matches{margin-top:12px;flex:0 0 auto;width:100%}
.b-article{max-width:780px;display:flex;flex-direction:column;gap:12px}.b-article ul{margin:0;padding-left:20px}
.b-card-img{width:100%;height:auto;border-radius:18px;display:block}.b-by{font-size:14px}

.b-zoom{position:relative;display:block;width:100%;padding:0;border:1px solid var(--b-line);border-radius:20px;background:#fff;cursor:zoom-in;overflow:hidden}
.b-shot .b-zoom img{width:100%;height:min(34vh,300px);object-fit:contain;border:0;border-radius:0;background:#fff}
.b-zoom-i{position:absolute;right:10px;bottom:10px;width:36px;height:36px;border-radius:10px;background:rgba(28,25,23,.75);color:#fff;font-size:20px;line-height:36px;text-align:center}
.b-lightbox{position:fixed;inset:0;z-index:1000;background:#fff;display:flex;align-items:center;justify-content:center;cursor:zoom-out;padding:12px}
.b-lightbox img{max-width:100%;max-height:100%;object-fit:contain}
.b-lb-x{position:absolute;top:12px;right:12px;width:48px;height:48px;border-radius:12px;border:1px solid #d6d3ce;background:#fff;color:#1c1917;font-size:28px;cursor:pointer}
.b-zoom,.b-img-empty{max-width:440px}
@media (min-width:900px){.b-shot .b-zoom img,.b-img-empty{height:260px}.b-shot{flex:0 1 440px}.b-screen{justify-content:flex-start;gap:40px}}

.b-toc{max-width:780px}.b-toc ol{padding-left:22px;display:flex;flex-direction:column;gap:6px;margin:8px 0}.b-toc h2{font-size:22px}
.b-steps-all{display:flex;flex-direction:column;gap:18px;max-width:1000px}.b-steps-all>h2{margin-top:26px}
.b-stepcard{display:grid;grid-template-columns:minmax(0,260px) 1fr;gap:20px;align-items:start;background:var(--b-surface);border:1px solid var(--b-line);border-radius:18px;padding:16px;scroll-margin-top:90px}
.b-stepimg{display:block;border-radius:12px;overflow:hidden;background:#fff;border:1px solid var(--b-line)}.b-stepimg img{display:block;width:100%;height:auto}
.b-stepcard .b-img-empty{height:auto;aspect-ratio:1/1;font-size:13px}
.b-stepbody{display:flex;flex-direction:column;gap:8px}.b-stepbody h3{font-size:21px}.b-stepbody p{color:var(--b-ink2)}
.b-tipline,.b-checkline,.b-mistake{font-size:15px}.b-mistake{background:rgba(194,65,12,.08);border-radius:10px;padding:8px 12px}
.b-mid{margin:8px 0}
@media (max-width:640px){.b-stepcard{grid-template-columns:110px 1fr;gap:12px;padding:12px}.b-stepbody h3{font-size:18px}}
.b-shot .b-mistake{margin:0}

.b-goal{display:inline-flex;align-items:center;gap:6px;padding:3px 10px 3px 3px;border:1px solid var(--b-line);border-radius:999px;background:var(--b-surface);color:inherit;font:inherit;font-size:13px;font-weight:600;cursor:zoom-in}.b-goal img{width:30px;height:30px;border-radius:999px;background:#fff;object-fit:contain}
.b-goal-fig{margin:0;max-width:420px;background:#fff;border:1px solid var(--b-line);border-radius:18px;overflow:hidden}.b-goal-fig img{display:block;width:100%;height:auto}.b-goal-fig figcaption{padding:8px 14px;font-size:14px;font-weight:600;color:#1c1917;border-top:1px solid var(--b-line)}

/* build mode: the steps app hides the site menu and footer so builders stay focused */
body:has(.b-app) .site-h{position:static}
body:has(.b-app) .site-h .nav,body:has(.b-app) .site-h .live,body:has(.b-app) .site-h .menu-btn,body:has(.b-app) .site-f{display:none!important}
body:has(.b-app) main{padding-bottom:110px}
.b-app .b-top{top:0;z-index:30}
.b-top-r{display:flex;align-items:center;gap:10px;margin-left:auto}
.b-top-r>span{color:var(--b-muted);white-space:nowrap}
@media (max-width:520px){.b-top-r>span{display:none}}
/* one callout style: same box, only the label color changes */
.b-call{display:flex;flex-direction:column;gap:2px;background:var(--b-surface);border:1px solid var(--b-line);border-left:4px solid var(--b-line);border-radius:12px;padding:10px 14px;font-size:15px;color:var(--b-ink2,var(--b-ink))}
.b-call b{font-size:12.5px;letter-spacing:.06em;text-transform:uppercase}
.b-call-tip{border-left-color:var(--accent)}.b-call-tip b{color:var(--b-tint-ink)}
.b-call-warn{border-left-color:var(--warm)}.b-call-warn b{color:var(--warm)}
[data-theme="dark"] .b-call-warn b{color:var(--warm)}
.b-nav .b-btn{min-height:52px}
body:has(.b-app) .b-app{min-height:calc(100vh - 64px)}
/* laptop: fill the screen instead of leaving a gap above the button bar */
@media (min-width:900px){body:has(.b-app) .b-screen{min-height:calc(100vh - 64px - 96px - 90px);align-content:center;padding-bottom:24px}.b-shot{flex:0 1 520px}.b-shot .b-zoom img,.b-img-empty{height:min(46vh,420px)}}
@media (min-width:900px){.b-zoom,.b-img-empty{max-width:none}}

/* builder picker: a small dropdown under the You button, not a full width panel */
.b-top .b-wrap{position:relative}
.b-top .b-profiles{position:absolute;right:max(16px,calc((100% - 1148px)/2));top:52px;width:min(320px,calc(100vw - 32px));margin:0;z-index:40;box-shadow:0 12px 32px rgba(0,0,0,.28);padding:14px}
.b-profiles h2,.b-profiles b{font-size:15px}
a.b-pchip{display:inline-flex;align-items:center;text-decoration:none}

/* live camera mode */
.b-live-btn{display:inline-flex;align-items:center;gap:6px}
@media (max-width:420px){.b-live-btn span{display:none}}
.lv{position:fixed;inset:0;z-index:1000;background:#000;color:#fff;font-family:var(--b-body)}
.lv-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.lv-top{position:absolute;left:0;right:0;top:0;display:flex;justify-content:space-between;gap:12px;padding:max(14px,env(safe-area-inset-top)) 16px 30px;background:linear-gradient(rgba(0,0,0,.7),transparent)}
.lv-step{display:flex;flex-direction:column;gap:2px}.lv-step span{font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;opacity:.8}.lv-step b{font-size:18px;line-height:1.25}
.lv-x{width:44px;height:44px;flex:none;border-radius:12px;border:0;background:rgba(255,255,255,.18);color:#fff;font-size:26px;cursor:pointer}
.lv-thumb{position:absolute;right:16px;top:calc(max(14px,env(safe-area-inset-top)) + 70px);width:min(30vw,150px);aspect-ratio:1;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,.4)}.lv-thumb img{width:100%;height:100%;object-fit:contain}
.lv-bottom{position:absolute;left:0;right:0;bottom:0;display:flex;flex-direction:column;gap:10px;padding:40px 16px max(16px,env(safe-area-inset-bottom));background:linear-gradient(transparent,rgba(0,0,0,.85) 30%)}
.lv-msg{background:rgba(20,20,20,.85);border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:12px 14px;font-size:16px;line-height:1.45}.lv-msg p{margin:0}.lv-msg.good{border-color:#8CE6D7}.lv-msg.bad{border-color:#F6C7A1}.lv-msg .b-verdict{margin-bottom:6px;display:inline-block}
.lv-row{display:flex;gap:10px;align-items:center;justify-content:space-between}.lv-row .b-btn{flex:1;min-height:54px}
.lv-voice{border:1px solid rgba(255,255,255,.3);background:transparent;color:#fff;border-radius:999px;padding:6px 12px;font:600 13px var(--b-body);cursor:pointer}.lv-left{font-size:13px;opacity:.8}
@media (min-width:900px){.lv-bottom{left:50%;transform:translateX(-50%);max-width:560px;width:100%;border-radius:18px 18px 0 0}}

/* builder fixes list */
.b-fixes-list{padding-left:20px;margin:8px 0 16px}.b-fixes-list li{margin:6px 0}
/* challenge entry form and gallery */
.b-entry-form{display:grid;gap:14px;max-width:560px;background:var(--b-surface);border:1px solid var(--b-line);border-radius:16px;padding:20px}
.b-entry-form label{display:grid;gap:6px;font-weight:600}
.b-entry-form input:not([type=checkbox]),.b-entry-form select{min-height:48px;border-radius:12px;border:1px solid var(--b-line2);background:var(--b-surface);color:var(--b-ink);padding:0 14px;font:inherit;font-weight:400}
.b-entry-form input[type=file]{padding:10px 14px}
.b-entry-form .b-check{display:flex;gap:10px;align-items:flex-start;font-weight:400}.b-entry-form .b-check input{width:22px;height:22px;flex:none;margin-top:1px}
.b-entries{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.b-entry{margin:0;background:var(--b-surface);border:1px solid var(--b-line);border-radius:16px;overflow:hidden}
.b-entry img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;display:block;background:var(--b-ph)}
.b-entry figcaption{display:grid;gap:2px;padding:12px 14px}.b-entry figcaption span{color:var(--b-muted);font-size:14px}.b-entry figcaption p{margin:6px 0 0}
/* printable build card */
.b-print-bar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding-top:20px}
.b-printcard{max-width:760px;margin:20px auto 40px;background:#fff;color:#15171C;border:2px solid #15171C;border-radius:20px;padding:28px;display:grid;gap:18px}
.b-printcard h1{font-family:var(--b-display);font-size:40px;line-height:1.05;margin:4px 0}
.b-printcard .b-eyebrow{color:#9A3412}
.b-pc-hero{width:100%;height:auto;max-height:320px;object-fit:contain}
.b-pc-row{display:grid;grid-template-columns:200px 1fr;gap:24px;align-items:center}
.b-pc-qr svg{width:200px;height:200px;display:block}
.b-pc-steps{margin:0;padding-left:22px;font-size:18px;line-height:1.5}
.b-pc-foot{display:flex;flex-wrap:wrap;gap:16px 28px;border-top:1px dashed #9CA3AF;padding-top:14px;font-size:15px}
@media (max-width:560px){.b-pc-row{grid-template-columns:1fr;justify-items:center}.b-printcard h1{font-size:30px}}
@media print{.site-h,.site-f,.b-print-bar,.live,.menu-btn{display:none!important}body{background:#fff}.b-printcard{margin:0 auto;border-width:2px;break-inside:avoid}}
.b-entry-form label{min-width:0}.b-entry-form input:not([type=checkbox]),.b-entry-form select{width:100%;box-sizing:border-box;min-width:0}
.b-rv{display:grid;gap:8px;margin:0 0 12px}.b-rv-img{max-width:100%;height:auto;border-radius:12px}
.b-see-ask{outline:3px solid var(--b-brand);outline-offset:3px}
.b-known{border-left:3px solid var(--b-brand);padding:4px 0 4px 12px;margin:0 0 14px}.b-known p{margin:4px 0}.b-known ol{margin:6px 0 0;padding-left:20px}.b-known li{margin:4px 0}
/* actual-size screw check */
.b-screw-btn{border:1px dashed var(--b-brand);background:transparent;color:var(--b-tint-ink);border-radius:999px;padding:6px 12px;font:600 14px var(--b-body);cursor:pointer;min-height:36px}
.b-screws{margin:12px 0;background:var(--b-surface);border:1px solid var(--b-line);border-radius:16px;padding:14px 16px;display:grid;gap:12px;overflow:hidden}
.b-screws p{margin:0}
.b-screw{display:grid;gap:6px}.b-screw-art{background:#fff;border-radius:10px;padding:8px;overflow-x:auto}.b-screw-art svg{display:block}
.b-screw span{font-size:15px}
.b-card-box{max-width:100%;border:2px dashed var(--b-ink);border-radius:10px;background:var(--b-tint);display:flex;align-items:center;justify-content:center;color:var(--b-tint-ink);font-weight:700}
#card-w{width:100%}
.b-pc-screws{border-top:1px dashed #9CA3AF;padding-top:14px}.b-pc-screws h2{font-size:18px;margin:0 0 4px}.b-pc-screws p{margin:0 0 10px;font-size:13px;color:#555B66}
.b-pc-sgrid{display:flex;flex-wrap:wrap;gap:10px 22px;align-items:flex-end}.b-pc-s{display:grid;gap:3px;justify-items:start;font-size:12px}
/* match the main site: mono labels, chip badges, card surfaces */
.bld .b-crumbs{font:12px var(--mono);letter-spacing:.12em;text-transform:uppercase}
.bld .b-crumbs a{text-decoration:underline}
.bld .b-badge{font:500 12px var(--mono);letter-spacing:.1em;text-transform:uppercase;border:1px solid color-mix(in srgb,var(--accent) 45%,transparent);background:var(--accent-soft);color:var(--accent)}
.bld .b-eyebrow{font-family:var(--mono);letter-spacing:.12em}
.bld .b-btn{font-family:var(--body);transition:transform .3s var(--ease),box-shadow .3s var(--ease),background-color .3s var(--ease)}
.bld .b-btn-p:hover{box-shadow:var(--shadow-hover);transform:translateY(-1px)}
/* same page edge as the rest of the site: full width wrapper, narrow reading column inside */
.bld .b-wrap{max-width:1200px;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.bld .b-wrap.b-guide-hero,.bld .b-wrap.b-article,.bld .b-wrap.b-faq,.bld .b-wrap.b-toc,.bld .b-wrap.b-flow,.bld .b-wrap.b-steps-all,.bld .b-wrap.b-src{max-width:1200px}
.bld .b-wrap.b-guide-hero>*{max-width:900px}
.bld .b-wrap.b-article>*,.bld .b-wrap.b-faq>*,.bld .b-wrap.b-toc>*,.bld .b-wrap.b-flow>*,.bld .b-wrap.b-src>*{max-width:780px}
.bld .b-wrap.b-steps-all>*{max-width:1000px}
.bld .b-nav>div{max-width:1200px}