/* ==========================================================================
   Arclab landing kit: styles. Part of the kit; keep identical in every repo.

   Generated from the owner's reference page (arclab-landing.html, the
   approved Arclab marketing design) with every rule scoped under .ak so it
   never leaks into app screens. Keep it faithful to that file: cream paper
   (--paper #FFF8EC), ink #1A1A1A, red #E64A2E accents and scribbles,
   sticky-note colors (yellow, teal, gray, orange, green), Instrument Serif
   headings, Inter body, Caveat handwriting, JetBrains Mono labels.
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@400;500;600&family=Caveat:wght@500;600&family=JetBrains+Mono:wght@400;500&display=swap");

/* Host page: the apps' own globals may set a dark body; marketing pages are paper. */
body:has(.ak){margin:0;background:#FFF8EC}
/* Undo app resets (e.g. Tailwind preflight) that the reference doesn't have. */
.ak svg{display:inline;vertical-align:baseline}
.ak button{font:inherit}
.ak{
  --paper:#FFF8EC; --ink:#1A1A1A; --mute:#6E6A62; --line:#E9E1D2; --tile:#EDE5D6;
  --yellow:#F5D842; --teal:#9CCBD4; --red:#E64A2E; --orange:#E85E2C; --gray:#CFC8BD; --green:#9BC9A0;
  box-sizing:border-box; padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
.ak *,.ak *::before,.ak *::after{box-sizing:inherit}
html:has(.ak){scroll-padding-top:env(safe-area-inset-top,0px)}
.ak{margin:0;background:var(--paper);color:var(--ink);font:400 14px/1.55 Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.ak .serif{font-family:"Instrument Serif",Georgia,serif;font-weight:400;letter-spacing:-.02em}
.ak .hand{font-family:Caveat,"Segoe Print",cursive;font-weight:600}
.ak h1,.ak h2,.ak h3{margin:0;font-family:"Instrument Serif",Georgia,serif;font-weight:400;letter-spacing:-.02em}
.ak h1{font-size:clamp(2.6rem,5.2vw,4rem);line-height:1.02}
.ak h2{font-size:clamp(1.7rem,2.6vw,2.1rem);line-height:1.12}
.ak h3{font-size:1.45rem;line-height:1.2}
.ak p{margin:0}
.ak a{color:inherit}
.ak img{max-width:100%;display:block}
.ak .wrap{max-width:760px;margin:0 auto;padding:0 20px}
.ak .wide{max-width:1140px;margin:0 auto;padding:0 20px}
.ak :focus-visible{outline:2px solid var(--red);outline-offset:3px}
.ak .sr{position:absolute;left:-9999px}
.ak .eyebrow{font-size:.8rem;color:var(--mute);margin-bottom:8px}

/* grid lines */
.ak .gridlines{position:absolute;inset:0;pointer-events:none;z-index:0}
.ak .gridlines i{position:absolute;background:var(--ink);opacity:.06}
.ak .gridlines .v{top:0;bottom:0;width:1px}
.ak .gridlines .h{left:0;right:0;height:1px}
@media (max-width:760px){.ak .gridlines{display:none}}

/* nav */
.ak header{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(8px)}
.ak .nav{display:flex;align-items:center;gap:22px;height:52px}
.ak .logo{display:flex;align-items:center;gap:6px;text-decoration:none;font-family:"Instrument Serif",serif;font-size:1.25rem;letter-spacing:-.01em}
.ak .logo svg{width:16px;height:16px}
.ak .links{display:flex;gap:16px;align-items:center}
.ak .links a{text-decoration:none;color:var(--mute);font-size:.82rem}
.ak .links a:hover,.ak .links a[aria-current="page"]{color:var(--ink)}
.ak .right{margin-left:auto;display:flex;gap:8px}
.ak .btn{display:inline-block;background:var(--ink);color:var(--paper);text-decoration:none;border-radius:5px;padding:7px 11px;font:500 .8rem Inter,sans-serif;border:1px solid var(--ink);white-space:nowrap;cursor:pointer}
.ak .btn:hover{background:var(--red);border-color:var(--red);color:#fff}
.ak .btn.o{background:transparent;color:var(--ink)}
.ak .btn.o:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.ak .menu{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:5px;padding:6px 10px;color:var(--ink);font:inherit}
@media (max-width:860px){.ak .links{display:none;position:absolute;left:0;right:0;top:52px;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;padding:14px 20px 18px;gap:12px}.ak .links.open{display:flex}.ak .menu{display:block}.ak .right{display:none}}

/* hero */
.ak .hero{position:relative;text-align:center;padding:170px 0 140px;min-height:640px}
.ak .hero .in{position:relative;z-index:2;max-width:620px;margin:0 auto;padding:0 20px}
.ak .hero .eyebrow{margin-bottom:10px}
.ak .hero h1{display:inline-block;position:relative}
.ak .hero h1 .scrib{position:absolute;left:30%;right:0;bottom:-14px;height:18px;width:70%}
.ak .hero .sub{margin:22px auto 0;max-width:46ch;color:var(--mute);font-size:.85rem;line-height:1.6}
.ak .hero .ctas{display:flex;gap:6px;justify-content:center;margin-top:20px}
.ak .doodle{position:absolute;z-index:1;font-family:Caveat,cursive;font-weight:600;font-size:1.25rem;line-height:1;display:flex;align-items:center;gap:6px;color:var(--ink)}
.ak .doodle svg{width:26px;height:26px}
.ak .band{position:absolute;left:50%;top:0;bottom:0;width:min(1060px,100%);transform:translateX(-50%);pointer-events:none}
.ak .band .note,.ak .band .doodle{pointer-events:auto}
.ak .doodle.l{left:40px;top:60px;transform:rotate(-6deg)}
.ak .doodle.r{right:40px;top:60px;transform:rotate(5deg)}
.ak .note{position:absolute;z-index:1;width:84px;height:84px;border-radius:6px;box-shadow:2px 4px 10px rgba(0,0,0,.18);display:grid;place-items:center;color:#1A1A1A;font-family:Caveat,cursive;font-weight:600;font-size:1.05rem;line-height:1;text-align:center;padding:6px}
.ak .note svg{width:60px;height:60px}
.ak .note .lab{display:block;font-size:.95rem}

@media (max-width:760px){.ak .hero{min-height:0;padding:70px 0 40px}.ak .note{width:68px;height:68px}.ak .doodle{display:none}.ak .band{width:100%}}

/* trusted */
.ak .trust{text-align:center;color:var(--mute);font-size:.8rem;padding:0 0 60px}
.ak .trust .row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.ak .trust .row span{font-family:"JetBrains Mono",monospace;font-size:.75rem;border:1px solid var(--line);border-radius:999px;padding:5px 10px}

/* stepper */
.ak section{padding:60px 0;position:relative}
.ak .stepper{display:grid;grid-template-columns:1fr 240px;gap:36px;align-items:start}
.ak .stepper .block{position:sticky;top:90px;border-radius:12px;aspect-ratio:1.5;overflow:hidden;background:var(--teal);display:grid;place-items:center;transition:background .5s}
.ak .stepper .block .shot{position:absolute;width:72%;border-radius:6px;overflow:hidden;box-shadow:0 20px 40px -20px rgba(0,0,0,.4);opacity:0;transform:translateY(16px) scale(.97);transition:opacity .5s,transform .6s cubic-bezier(.2,.8,.2,1);border:1px solid rgba(0,0,0,.08)}
.ak .stepper .block .shot.on{opacity:1;transform:none}
.ak .stepper .block .shot img{width:100%;aspect-ratio:1800/985;object-fit:cover}
.ak .stepper .block .shot.ph{aspect-ratio:1800/985;background:#fff;display:grid;place-items:center;color:var(--mute);font-size:.75rem;padding:10px;text-align:center}
.ak .steps{display:grid;gap:70px;padding:10px 0 20px}
.ak .step{opacity:.35;transition:opacity .4s}
.ak .step.on{opacity:1}
.ak .step .num{display:inline-flex;align-items:center;gap:4px;margin-bottom:12px}
.ak .step .num span{border:1px solid var(--ink);border-radius:4px;padding:1px 7px;font-size:.78rem;background:var(--paper)}
.ak .step .num i{width:20px;height:20px;border-radius:4px;display:inline-grid;place-items:center;background:var(--c);color:#1A1A1A}
.ak .step .num i svg{width:13px;height:13px}
.ak .step h3{margin-bottom:8px}
.ak .step p{color:var(--mute);font-size:.82rem;line-height:1.55}
@media (max-width:860px){.ak .stepper{grid-template-columns:1fr}.ak .stepper .block{position:static;aspect-ratio:1.4}.ak .steps{gap:30px}.ak .step{opacity:1}}

/* red tile cta */
.ak .cta{position:relative;border-radius:10px;background:var(--red);color:#fff;text-align:center;padding:64px 20px;overflow:hidden;margin:20px 0}
.ak .cta::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.12) 1px,transparent 1px);background-size:72px 72px;background-position:center}
.ak .cta>*{position:relative}
.ak .cta h2{font-size:clamp(1.9rem,3.4vw,2.6rem);color:#fff}
.ak .cta p{font-size:.8rem;opacity:.9;margin:10px 0 18px}
.ak .cta .btn{background:#fff;color:var(--ink);border-color:#fff}
.ak .cta .btn:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.ak .cta svg.sq{position:absolute;width:140px;height:140px;fill:none;stroke:#fff;stroke-width:1.5;stroke-linecap:round;opacity:.95}
.ak .cta .sq.tl{left:-10px;top:-10px}.ak .cta .sq.tr{right:-10px;top:-10px;transform:scaleX(-1)}.ak .cta .sq.bl{left:-10px;bottom:-10px;transform:scaleY(-1)}.ak .cta .sq.br{right:-10px;bottom:-10px;transform:scale(-1)}

/* tiles (playbook) */
.ak .tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
.ak .tile{border:1px solid var(--line);border-radius:10px;padding:12px;background:var(--paper)}
.ak .tile .art{background:var(--tile);border-radius:8px;height:120px;display:flex;align-items:center;justify-content:center;gap:8px}
.ak .tile .st{width:42px;height:42px;border-radius:10px;background:#fff;border:2px solid var(--c);display:grid;place-items:center;box-shadow:0 2px 0 rgba(0,0,0,.08);transform:rotate(var(--r,0deg))}
.ak .tile .st svg{width:22px;height:22px}
.ak .tile p{font-size:.82rem;margin-top:12px;line-height:1.5}
.ak .tile p b{font-weight:600}
.ak .tile .meta{font-family:"JetBrains Mono",monospace;font-size:.7rem;color:var(--mute);margin-top:8px}
@media (max-width:760px){.ak .tiles{grid-template-columns:1fr}}
.ak .sechead{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:22px}
.ak .sechead a{font-size:.8rem;color:var(--mute);text-decoration:none;white-space:nowrap}
.ak .sechead a:hover{color:var(--ink)}

/* quote / note card */
.ak .card{display:grid;grid-template-columns:200px 1fr;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-top:24px}
.ak .card .side{background:var(--tile);position:relative;display:grid;place-items:center;min-height:180px;overflow:hidden}
.ak .card .side .note{position:relative;width:96px;height:96px;transform:rotate(-5deg)}
.ak .card .side svg.sq{position:absolute;width:90px;height:90px;fill:none;stroke:var(--ink);stroke-width:1.2;opacity:.5}
.ak .card .body{padding:26px 28px}
.ak .card .body p{font-size:.92rem;line-height:1.6}
.ak .card .body p+p{margin-top:.9em}
.ak .card .body b{font-weight:600}
.ak .card .who{display:flex;gap:10px;align-items:center;margin-top:18px}
.ak .card .who .av{width:30px;height:30px;border-radius:5px;background:var(--ink);color:var(--yellow);display:grid;place-items:center;font-family:Caveat;font-weight:600;font-size:1rem}
.ak .card .who b{display:block;font-family:"Instrument Serif",serif;font-weight:400;font-size:1.05rem}
.ak .card .who span{font-size:.72rem;color:var(--mute)}
@media (max-width:700px){.ak .card{grid-template-columns:1fr}.ak .card .side{min-height:140px}}

/* demos */
.ak .demos{display:grid;gap:18px;margin-top:24px}
.ak .demo{border-radius:12px;padding:16px;background:var(--c)}
.ak .demo .win{background:#fff;color:#1A1A1A;border-radius:8px;overflow:hidden;border:1px solid rgba(0,0,0,.08)}
.ak .demo .top{display:flex;gap:10px;align-items:center;padding:9px 12px;border-bottom:1px solid #EEE6D7;font:500 .72rem "JetBrains Mono",monospace;color:#6E6A62}
.ak .demo .top span{margin-left:auto}
.ak .demo .bd{padding:14px}
.ak .demo pre{margin:0;background:#FFF8EC;border:1px solid #EEE6D7;border-radius:6px;padding:12px;font:500 .8rem/1.6 "JetBrains Mono",monospace;overflow:auto}
.ak .kw{color:#2E5BFF}.ak .stc{color:#1D8A4E}.ak .cm{color:#8a857a}
.ak .choices{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.ak .choice{border:1px solid #D9D1C2;border-radius:6px;padding:6px 11px;background:#fff;font:500 .8rem "JetBrains Mono",monospace;cursor:pointer;color:#1A1A1A}
.ak .choice:hover{border-color:#1A1A1A}
.ak .choice.ok{background:var(--yellow);border-color:var(--yellow)}
.ak .choice.no{border-color:var(--red);color:var(--red)}
.ak .fb{margin-top:10px;color:#6E6A62;font-size:.82rem;min-height:1.2em}
.ak .cmp{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
@media (max-width:640px){.ak .cmp{grid-template-columns:1fr}}
.ak .cmp .lbl{font-size:.72rem;color:#6E6A62;margin-bottom:5px;display:flex;justify-content:space-between}
.ak .cmp pre .hl{background:rgba(245,216,66,.5);display:block;margin:0 -12px;padding:0 12px}
.ak .pipe{display:flex;margin:2px 0 12px}
.ak .sn{flex:1;text-align:center;position:relative;min-width:70px}
.ak .sn .c{width:30px;height:30px;border-radius:50%;border:2px solid #D9D1C2;margin:0 auto 5px;display:grid;place-items:center;font:600 .72rem "JetBrains Mono",monospace;background:#fff;position:relative;z-index:1}
.ak .sn .l{font-size:.72rem;color:#6E6A62}
.ak .sn::after{content:"";position:absolute;left:50%;right:-50%;top:15px;height:2px;background:#D9D1C2}
.ak .sn:last-child::after{display:none}
.ak .sn.run .c{border-color:var(--yellow);border-top-color:transparent;animation:spin 1s linear infinite}
.ak .sn.ok .c{background:var(--yellow);border-color:var(--yellow)}
.ak .sn.bad .c{background:var(--red);border-color:var(--red);color:#fff}
@keyframes spin{to{transform:rotate(360deg)}}
.ak .log{background:#1A1A1A;color:#d7d0c3;border-radius:6px;padding:10px;font:.75rem/1.6 "JetBrains Mono",monospace;min-height:120px;max-height:170px;overflow:auto;white-space:pre-wrap}
.ak .log .g{color:#9BC9A0}.ak .log .r{color:#FF8A73}.ak .log .y{color:#F5D842}.ak .log .b{color:#9CCBD4}.ak .log .m{color:#8a857a}
.ak .row2{display:grid;grid-template-columns:1.4fr 1fr;gap:12px}
@media (max-width:700px){.ak .row2{grid-template-columns:1fr}}
.ak .act{border:1px solid #D9D1C2;border-radius:6px;padding:7px 11px;background:#fff;font:500 .78rem Inter,sans-serif;cursor:pointer;color:#1A1A1A}
.ak .act:hover{border-color:#1A1A1A}
.ak .act:disabled{opacity:.4;cursor:default}
.ak .acts{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.ak .dn{border-left:3px solid var(--yellow);padding:2px 0 2px 10px;margin-top:10px;font-size:.8rem;color:#6E6A62;display:none}
.ak .dn.on{display:block}.ak .dn b{color:#1A1A1A}
.ak .gauge{display:flex;align-items:center;gap:8px;font-size:.72rem;color:#6E6A62;margin-bottom:6px}
.ak .gauge .bar{flex:1;height:6px;border-radius:999px;background:#FFF8EC;border:1px solid #EEE6D7;overflow:hidden}
.ak .gauge .bar b{display:block;height:100%;background:#1D8A4E;width:100%;transition:width .5s,background .5s}
.ak canvas.chart{width:100%;height:150px;display:block;border:1px solid #EEE6D7;border-radius:6px;background:#FFF8EC}
.ak .page-alert{border:1.5px solid var(--red);border-radius:6px;padding:8px 10px;font:.75rem "JetBrains Mono",monospace;display:none;margin-top:10px;color:#1A1A1A;background:#fff}
.ak .page-alert.on{display:block}

/* faq + misc */
.ak .faq{margin-top:20px}
.ak .faq details{border-top:1px solid var(--line)}
.ak .faq details:last-child{border-bottom:1px solid var(--line)}
.ak .faq summary{list-style:none;cursor:pointer;padding:14px 30px 14px 0;font-family:"Instrument Serif",serif;font-size:1.15rem;position:relative}
.ak .faq summary::-webkit-details-marker{display:none}
.ak .faq summary::after{content:"+";position:absolute;right:0;top:9px;font-size:1.3rem;color:var(--mute)}
.ak .faq details[open] summary::after{content:"–"}
.ak .faq details p{color:var(--mute);padding-bottom:16px;font-size:.85rem;max-width:60ch}
.ak .cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:22px}
.ak .cols h3{font-size:1.15rem;margin-bottom:4px}
.ak .cols p{color:var(--mute);font-size:.82rem}
@media (max-width:700px){.ak .cols{grid-template-columns:1fr}}
.ak .terms{display:grid;grid-template-columns:1fr 1fr;gap:0 30px;margin-top:20px}
.ak .terms div{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:.85rem}
.ak .terms div span:last-child{color:var(--mute)}
@media (max-width:600px){.ak .terms{grid-template-columns:1fr}}
.ak .big{text-align:center;padding:60px 20px 20px;font-family:"Instrument Serif",serif;font-size:clamp(2.6rem,8vw,6.5rem);line-height:1;letter-spacing:-.03em;position:relative}
.ak .big .scrib{display:block;width:min(60%,420px);height:22px;margin:4px auto 0}
.ak footer{padding:30px 0 40px;font-size:.78rem;color:var(--mute);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:30px}
.ak footer nav{display:flex;gap:14px;flex-wrap:wrap}
.ak footer a{text-decoration:none}
@media (prefers-reduced-motion:reduce){.ak *{animation:none!important;transition:none!important}}

/* ── Kit additions ─────────────────────────────────────────────────────── */
.ak{min-height:100vh;overflow-x:clip}
html:has(.ak){scroll-behavior:smooth}
/* The apps set html{font-size:14px}; the reference sizes are rem on a 16px root. */
html:has(.ak){font-size:16px}
.ak .logo-product{margin-left:6px;font:500 .72rem/1 "JetBrains Mono",monospace;color:var(--mute);letter-spacing:0}
/* The Arclab mark (an image) in the header and the founder note. */
.ak .logo img{width:auto;height:20px;display:block}
.ak .stepper .block .shot img{height:auto}
/* Sticky notes wait for GSAP to drop them in (EARLY_SCRIPT adds ak-js). */
.ak-js .ak .hero .note,.ak-js .ak .hero .doodle{opacity:0}
@media (prefers-reduced-motion:reduce){html:has(.ak){scroll-behavior:auto}}

/* ── Full-width layout (owner request, 2026-09-30) ──────────────────────
   The reference caps content at 760px, which reads as a narrow column on
   wide screens. Sections use the full page width (up to --ak-max), the
   hero plus the "Inside Arclab" pills fill the first screen, and type
   scales up to match. Mobile keeps the reference layout. */
/* Fluid container: 4vw gutters (20px min) up to an 1840px cap, so the page scales with the screen. */
.ak{--ak-pad:max(20px,4vw);--ak-max:1840px;font-size:clamp(15px,.35vw + 10px,18px)}
.ak .wrap,.ak .wide{max-width:calc(var(--ak-max) + 2 * var(--ak-pad));padding:0 var(--ak-pad)}
.ak section{padding:clamp(64px,8vw,112px) 0}
.ak h2{font-size:clamp(2rem,3.4vw,3rem)}
.ak h3{font-size:clamp(1.35rem,1.6vw,1.65rem)}
.ak .eyebrow{font-size:.9rem}

/* Hero: the first screen (header 52px, pills row ~120px). */
.ak .hero{min-height:max(640px,calc(100svh - 52px - 124px));padding:0;display:flex;align-items:center;justify-content:center}
.ak .hero .in{max-width:min(1200px,90vw);padding:clamp(120px,14vh,170px) 20px clamp(150px,18vh,200px)}
.ak .hero h1{font-size:clamp(2.8rem,6vw,8rem);text-wrap:balance}
.ak .hero .sub{max-width:52ch;font-size:clamp(.95rem,1.15vw,1.15rem)}
.ak .hero .ctas{gap:8px;margin-top:28px}
.ak .hero .ctas .btn{font-size:.95rem;padding:10px 16px}
.ak .band{width:calc(min(100%,var(--ak-max) + 2 * var(--ak-pad)) - 2 * var(--ak-pad))}
/* One fluid size per note; icon and label scale from it so they always fit inside. */
.ak .note{--ns:clamp(84px,6.5vw,128px);width:var(--ns);height:var(--ns);font-size:calc(var(--ns) * .17);padding:calc(var(--ns) * .07)}
.ak .note svg{width:calc(var(--ns) * .52);height:calc(var(--ns) * .52)}
.ak .note .lab{font-size:1em}
.ak .doodle{font-size:clamp(1.25rem,1.5vw,1.6rem)}
.ak .doodle.l{left:0}
.ak .doodle.r{right:0}
.ak .trust{font-size:.9rem;padding:0 var(--ak-pad) 72px}
.ak .trust .row span{font-size:.82rem;padding:6px 12px}
.ak .nav{height:60px}
.ak .links a{font-size:.9rem}
.ak .btn{font-size:.85rem;padding:8px 13px}

/* Stepper: screenshot left, steps right, both wide. */
.ak .stepper{grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:clamp(36px,5vw,80px)}
.ak .stepper .block{top:110px}
.ak .stepper .block .shot{width:80%}
.ak .steps{gap:clamp(70px,14vh,160px);padding:20px 0 12vh}
.ak .step p{font-size:1rem;max-width:42ch}
.ak .step .num span{font-size:.9rem}

/* CTA tile, notebook, demos, note, columns, terms, FAQ. */
.ak .cta{padding:clamp(72px,9vw,128px) 20px}
.ak .cta h2{font-size:clamp(2.2rem,4.4vw,3.8rem)}
.ak .cta p{font-size:1rem}
.ak .sechead a{font-size:.9rem}
.ak .tiles{gap:20px;margin-top:32px}
.ak .tile{padding:16px}
.ak .tile .art{height:clamp(130px,12vw,190px)}
.ak .tile .st{width:52px;height:52px}
.ak .tile .st svg{width:26px;height:26px}
.ak .tile p{font-size:.95rem}
.ak .tile .meta{font-size:.78rem}
.ak .demos{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:32px}
.ak .demos > .demo:only-child,.ak .demos > .demo:last-child:nth-child(odd){grid-column:1 / -1}
.ak .demo{padding:20px}
.ak .demo pre{font-size:.88rem}
.ak .card{grid-template-columns:minmax(220px,0.75fr) 2fr;margin-top:32px}
.ak .card .side{min-height:320px}
.ak .card .side .note{--ns:140px}
.ak .card .body{padding:clamp(28px,4vw,56px)}
.ak .card .body p{font-size:1.05rem;max-width:68ch}
.ak .cols{gap:32px 40px;margin-top:32px}
.ak .cols p{font-size:.95rem}
.ak .terms div{font-size:.95rem;padding:14px 0}
.ak .faq summary{font-size:clamp(1.2rem,1.5vw,1.5rem);padding:20px 40px 20px 0}
.ak .faq summary::after{top:16px}
.ak .faq details p{font-size:1rem;max-width:72ch}
.ak .big{font-size:clamp(3rem,10vw,9rem);padding:clamp(72px,9vw,128px) 20px 32px}
.ak footer{font-size:.85rem}

@media (max-width:860px){
  .ak .stepper{grid-template-columns:1fr}
  .ak .steps{padding-bottom:20px;gap:36px}
  .ak .demos{grid-template-columns:1fr}
  .ak .card{grid-template-columns:1fr}
  .ak .card .side{min-height:180px}
}
@media (max-width:760px){
  .ak .hero{min-height:0;display:block}
  .ak .hero .in{padding:70px 20px 220px}
  .ak .note{--ns:68px}
  .ak .band{width:100%}
  /* Notes sit below the buttons on phones (their inline top is for wide heroes). */
  .ak .band .note{top:auto!important;bottom:70px}
  .ak .band .note:nth-child(even){bottom:28px}
}
/* Founder-note sticky note holding the Arclab mark (after all note sizing rules). */
.ak .card .side .note{--ns:136px;width:var(--ns);height:var(--ns)}
.ak .card .side .note img.mark{width:auto;height:calc(var(--ns) * .38);margin:0 auto 6px;display:block}
/* "The Scientific Basis" section. */
.ak .research-tile{display:flex;flex-direction:column;gap:8px;padding:20px}
.ak .research-n{font:500 .78rem "JetBrains Mono",monospace;color:var(--red)}
.ak .research-tile h3{font-size:clamp(1.25rem,1.6vw,1.6rem);line-height:1.15}
.ak .research-tile p{margin:0;font-size:.92rem;color:var(--mute)}
.ak .research-tile .research-so{color:var(--ink);font-weight:500}
.ak .research-tile .meta{margin-top:auto}
.ak .research-note{margin-top:18px;font-size:.9rem;color:var(--mute)}
/* Research notes page (Research.tsx). */
.ak .research-hero{min-height:0}
.ak .research-hero .in{padding:clamp(80px,12vh,140px) 20px clamp(40px,6vh,72px)}
.ak .research-hero .sub+.sub{margin-top:14px}
.ak .research-papers{display:grid;gap:clamp(20px,2.4vw,32px)}
.ak .research-paper{border:1px solid var(--line);border-radius:12px;background:var(--paper);padding:clamp(20px,3vw,40px)}
.ak .research-paper-head{display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px 20px;align-items:start;margin-bottom:24px}
.ak .research-paper-head h2{font-size:clamp(1.5rem,2.4vw,2.2rem);line-height:1.12}
.ak .research-meta{margin:6px 0 0;font-size:.9rem;color:var(--mute)}
.ak .research-meta+.research-meta{margin-top:2px;font-family:"JetBrains Mono",monospace;font-size:.8rem}
.ak .research-doi{display:inline-block;margin-top:10px;font-size:.88rem;color:var(--ink);text-underline-offset:3px}
.ak .research-doi:hover{color:var(--red)}
.ak .research-paper .research-n{font-size:1.1rem;border:1px solid var(--ink);border-radius:5px;padding:2px 8px;color:var(--ink)}
.ak .research-fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:0}
.ak .research-fields>div{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px}
.ak .research-fields dt{font:500 .8rem "JetBrains Mono",monospace;color:var(--mute);margin-bottom:8px}
.ak .research-fields dd{margin:0;font-size:.95rem;line-height:1.6}
.ak .research-fields .research-limits{border-left:3px solid var(--red)}
.ak .research-measure{grid-template-columns:1fr}
.ak .research-contact{text-align:center;color:var(--mute);font-size:.9rem;margin:8px 0 24px}

/* ── Mission sections (arclab.app home, owner request 2026-10-01) ───────
   The gap and its arc, AI vs the job, the manifesto, the promise page and
   the audience marquee. landing.js only adds motion; every rule here shows
   the finished state, so the page reads the same without JavaScript. */
/* The home H1 wraps to two lines; a narrower box keeps the scribble under the words. */
.ak[data-product="arclab"][data-kind="product"] .hero h1{max-width:9.6em}
.ak .lede{margin-top:14px;max-width:62ch;color:var(--mute);font-size:1.05rem;line-height:1.65}
.ak .hand{font-family:Caveat,"Segoe Print",cursive;font-weight:600}

/* The gap: two cliffs and the arc between them. */
.ak .gap-scene{display:block;width:100%;height:auto;margin-top:clamp(24px,4vw,48px);overflow:visible}
.ak .gap-scene .cliff{fill:var(--tile);stroke:var(--ink);stroke-width:1.5;stroke-linejoin:round}
.ak .gap-scene .who,.ak .gap-scene .flag{fill:none;stroke:var(--ink);stroke-width:2.2;stroke-linecap:round}
.ak .gap-scene .who circle{fill:var(--yellow)}
.ak .gap-scene .flag .cloth{fill:var(--red);stroke:var(--red)}
.ak .gap-scene text{font-family:Caveat,cursive;font-weight:600}
.ak .gap-scene .lbl{font-size:26px;fill:var(--ink)}
.ak .gap-scene .q{font-size:23px;fill:var(--mute)}
.ak .gap-scene .arc{fill:none;stroke-linecap:round}
.ak .gap-scene .arc-red{stroke:var(--red);stroke-width:5}
.ak .gap-scene .arc-ink{stroke:var(--ink);stroke-width:1.4;opacity:.55}
.ak .gap-scene .arc-name{font-size:30px;fill:var(--red)}
.ak .gap-scene .plank rect{stroke:var(--ink);stroke-width:1.4;filter:drop-shadow(2px 4px 4px rgba(0,0,0,.18))}
.ak .gap-scene .plank text{font-family:"Instrument Serif",Georgia,serif;font-weight:400;font-size:26px;fill:var(--ink)}
.ak .gap-legend{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:clamp(20px,3vw,40px)}
.ak .gap-legend>div{border-top:4px solid var(--c);padding-top:12px}
.ak .gap-legend b{font-family:"Instrument Serif",Georgia,serif;font-weight:400;font-size:1.45rem;margin-right:8px}
.ak .gap-legend .hand{font-size:1.2rem;color:var(--red)}
.ak .gap-legend p{margin-top:4px;color:var(--mute);font-size:.95rem}
@media (max-width:700px){
  /* Crop the cliff edges so the arc reads at phone width; the legend carries the labels. */
  .ak .gap-scene{width:136%;margin-left:-18%}
  .ak .gap-scene .q:nth-of-type(n+4),.ak .gap-scene .lbl{display:none}
  .ak .gap-legend{grid-template-columns:1fr;gap:14px}
}

/* AI writes the code; sticky notes list the rest of the job. */
.ak .ai-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:clamp(32px,5vw,80px);align-items:center}
.ak .ai-scene{position:relative;padding:clamp(40px,5vw,64px) clamp(24px,4vw,56px)}
.ak .ai-win{background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 24px 50px -28px rgba(0,0,0,.45);overflow:hidden}
.ak .ai-win .top{display:flex;align-items:center;gap:6px;padding:10px 12px;border-bottom:1px solid var(--line);font:500 .74rem "JetBrains Mono",monospace;color:var(--mute)}
.ak .ai-win .top i{width:9px;height:9px;border-radius:50%;background:var(--line)}
.ak .ai-win .top span{margin-left:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ak .ai-win pre{margin:0;padding:18px 16px;min-height:6.4em;background:var(--paper);font:500 clamp(.78rem,.9vw,.92rem)/1.6 "JetBrains Mono",monospace;white-space:pre-wrap;overflow-wrap:anywhere}
.ak .ai-win pre.typing::after{content:"▍";color:var(--red);animation:ak-blink 1s steps(1) infinite}
@keyframes ak-blink{50%{opacity:0}}
.ak .ai-done{display:flex;align-items:baseline;gap:12px;padding:10px 16px 14px;font:500 .8rem "JetBrains Mono",monospace}
.ak .ai-done .hand{font-size:1.35rem;color:var(--ink)}
.ak .ai-notes{list-style:none;margin:0;padding:0}
.ak .sticky{position:absolute;padding:10px 12px;min-width:7.5em;max-width:9.5em;border-radius:5px;box-shadow:2px 4px 10px rgba(0,0,0,.18);font:600 clamp(1.05rem,1.3vw,1.3rem)/1.05 Caveat,cursive;color:var(--ink);text-align:center;transform:rotate(var(--r,0deg))}
@media (max-width:900px){
  .ak .ai-grid{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:600px){
  .ak .ai-scene{padding:0}
  .ak .ai-notes{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:18px}
  .ak .sticky{position:static;min-width:0}
}

/* The manifesto lights up word by word; **phrases** get a marker sweep. */
.ak .manifesto{margin-top:12px;font-family:"Instrument Serif",Georgia,serif;font-size:clamp(1.9rem,4.2vw,4rem);line-height:1.12;letter-spacing:-.02em;max-width:30ch}
.ak .manifesto mark{color:inherit;background:linear-gradient(transparent 58%,color-mix(in srgb,var(--yellow) 80%,transparent) 58%,color-mix(in srgb,var(--yellow) 80%,transparent) 92%,transparent 92%) no-repeat 0 0/100% 100%;transition:background-size 1s cubic-bezier(.2,.8,.2,1)}
.ak .mission.pre mark{background-size:0% 100%}
.ak .mission.pre.lit mark{background-size:100% 100%}
.ak .stats{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));margin-top:clamp(40px,6vw,72px);border-top:1px dashed var(--ink)}
.ak .stats>div{padding:18px 16px 0 0}
.ak .stats>div+div{padding-left:16px;border-left:1px dashed var(--line)}
.ak .stats b{display:block;font-family:"Instrument Serif",Georgia,serif;font-weight:400;font-size:clamp(2.6rem,5vw,4.4rem);line-height:1;font-variant-numeric:tabular-nums}
.ak .stats .lbl{display:block;margin-top:6px;font:500 .8rem "JetBrains Mono",monospace;color:var(--mute)}
@media (max-width:760px){
  .ak .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ak .stats>div,.ak .stats>div+div{padding:16px 12px 0 0;border-left:0}
}

/* The promise: a ruled notebook page with a red margin. */
.ak .paper{position:relative;margin-top:28px;max-width:900px;background:#fff;border:1px solid var(--line);border-radius:6px;box-shadow:0 24px 50px -32px rgba(0,0,0,.4);padding:clamp(26px,4vw,48px) clamp(20px,4vw,48px) clamp(26px,4vw,40px) clamp(60px,8vw,96px);background-image:repeating-linear-gradient(transparent 0 calc(3.2rem - 1px),color-mix(in srgb,var(--teal) 55%,transparent) calc(3.2rem - 1px) 3.2rem);background-position:0 clamp(26px,4vw,48px)}
.ak .paper::before{content:"";position:absolute;top:0;bottom:0;left:clamp(42px,6vw,72px);width:2px;background:color-mix(in srgb,var(--red) 55%,transparent)}
.ak .paper ul{list-style:none;margin:0;padding:0}
.ak .paper li{display:flex;align-items:center;gap:14px;min-height:3.2rem;font:600 clamp(1.25rem,2vw,1.7rem)/1.15 Caveat,cursive;color:var(--ink)}
.ak .paper .box{flex:none;width:28px;height:28px;overflow:visible}
.ak .paper .box path{fill:none;stroke-linecap:round;stroke-linejoin:round}
.ak .paper .frame{stroke:var(--ink);stroke-width:1.6}
.ak .paper .tick{stroke:var(--red);stroke-width:3.2}
.ak .sign{margin:18px 0 0 auto;width:max-content;text-align:center}
.ak .sign .hand{display:block;font-size:clamp(2.2rem,3.6vw,3rem);line-height:1;transform:rotate(-4deg)}
.ak .sign .scrib{display:block;width:150px;height:14px}

/* Who it's for: two rows of sticky notes drifting in opposite directions. */
.ak .marquee{margin-top:clamp(24px,4vw,40px);display:grid;gap:14px;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.ak .track{display:flex;width:max-content;animation:ak-marquee 48s linear infinite}
.ak .track.rev{animation-direction:reverse;animation-duration:56s}
.ak .marquee:hover .track{animation-play-state:paused}
.ak .track ul{display:flex;gap:14px;margin:0;padding:8px 7px;list-style:none}
.ak .track li{padding:10px 16px;border-radius:5px;box-shadow:2px 3px 8px rgba(0,0,0,.14);font:600 clamp(1.15rem,1.4vw,1.4rem)/1 Caveat,cursive;white-space:nowrap;transform:rotate(var(--r,0deg))}
@keyframes ak-marquee{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){
  .ak .marquee{-webkit-mask-image:none;mask-image:none}
  .ak .track{width:auto;justify-content:center}
  .ak .track ul{flex-wrap:wrap;justify-content:center}
  .ak .track ul[aria-hidden]{display:none}
}
.ak .starts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:clamp(32px,5vw,56px)}
.ak .starts a{display:flex;flex-direction:column;gap:14px;justify-content:space-between;text-decoration:none;border:1px solid var(--line);border-left:6px solid var(--c);border-radius:10px;padding:20px 22px;background:var(--paper);transition:transform .25s,box-shadow .25s}
.ak .starts a:hover{transform:translateY(-4px) rotate(-.4deg);box-shadow:0 18px 30px -22px rgba(0,0,0,.45)}
.ak .starts .if{font-family:"Instrument Serif",Georgia,serif;font-size:clamp(1.3rem,1.7vw,1.7rem);line-height:1.15}
.ak .starts .go{display:flex;align-items:center;gap:10px;font:500 .9rem Inter,sans-serif}
.ak .starts .go svg{width:40px;height:16px;fill:none;stroke:var(--red);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .25s}
.ak .starts a:hover .go svg{transform:translateX(6px)}
@media (max-width:760px){.ak .starts{grid-template-columns:1fr}}

/* ── Foundations sections (learn.arclab.app, owner request 2026-10-01) ─────
   Gallery (gal-), AI ladder (lad-), syllabus (syl-), comparison table (vs-).
   Static: nothing here waits on landing.js. */
.ak .gal-lede{margin-top:14px;max-width:62ch;color:var(--mute);font-size:1.02rem;line-height:1.65}
.ak .gal-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:30px}
.ak .gal-item{margin:0;border-radius:12px;background:var(--c);padding:clamp(12px,2vw,22px) clamp(12px,2vw,22px) 0;display:flex;flex-direction:column;overflow:hidden}
.ak .gal-item.lead{grid-column:1/-1}
.ak .gal-frame{border-radius:7px 7px 0 0;overflow:hidden;border:1px solid rgba(0,0,0,.12);border-bottom:0;box-shadow:0 18px 36px -22px rgba(0,0,0,.5);background:#1e1e1e}
.ak .gal-frame img{width:100%;height:auto;aspect-ratio:1800/985;object-fit:cover;object-position:top}
.ak .gal-item figcaption{background:var(--paper);margin:0 calc(-1*clamp(12px,2vw,22px));padding:14px clamp(12px,2vw,22px) 16px;border-top:1px solid rgba(0,0,0,.08);font-size:.86rem;line-height:1.5;color:var(--mute);flex:1}
.ak .gal-item figcaption b{display:block;color:var(--ink);font:400 1.25rem/1.2 "Instrument Serif",Georgia,serif;margin-bottom:3px}
@media (max-width:760px){.ak .gal-grid{grid-template-columns:1fr;gap:16px}}

.ak .lad{list-style:none;margin:30px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:10px;align-items:end}
.ak .lad li{position:relative;border:1px solid var(--line);border-top:6px solid var(--c);border-radius:8px;background:#fff;padding:14px 12px 16px;min-height:calc(150px + var(--i)*34px);display:flex;flex-direction:column;gap:4px}
.ak .lad-n{position:absolute;top:-17px;right:10px;width:28px;height:28px;border-radius:50%;background:var(--c);border:2px solid var(--paper);display:grid;place-items:center;font:600 .75rem "JetBrains Mono",monospace}
.ak .lad b{font-size:1.45rem;line-height:1}
.ak .lad-where{font:500 .68rem/1.4 "JetBrains Mono",monospace;color:var(--mute)}
.ak .lad p{font-size:.82rem;line-height:1.5;margin-top:6px}
.ak .lad-note{margin-top:16px;font-size:.8rem;color:var(--mute);max-width:66ch}
@media (max-width:700px){.ak .lad{grid-template-columns:1fr 1fr}.ak .lad li{min-height:0}}
@media (max-width:420px){.ak .lad{grid-template-columns:1fr}}

.ak .syl{margin-top:26px;display:grid;gap:10px}
.ak .syl details{border:1px solid var(--line);border-radius:10px;background:#fff;overflow:hidden}
.ak .syl summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;padding:14px 44px 14px 16px;position:relative}
.ak .syl summary::-webkit-details-marker{display:none}
.ak .syl summary::after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);font:400 1.4rem/1 Inter,sans-serif;color:var(--mute)}
.ak .syl details[open] summary::after{content:"\2212"}
.ak .syl-name{font:400 1.35rem/1.2 "Instrument Serif",Georgia,serif}
.ak .syl-meta{font:500 .7rem "JetBrains Mono",monospace;color:var(--mute)}
.ak .syl ol{list-style:none;margin:0;padding:0 8px 10px;display:grid;grid-template-columns:1fr 1fr;column-gap:16px;border-top:1px solid var(--line)}
.ak .syl li{display:grid;grid-template-columns:26px 1fr auto;align-items:center;gap:8px;padding:8px;border-bottom:1px dashed var(--line);font-size:.84rem}
.ak .syl li.build .syl-t{font-weight:600}
.ak .syl-k{font:500 .68rem "JetBrains Mono",monospace;color:var(--mute)}
.ak .syl-tag{font:500 .62rem "JetBrains Mono",monospace;white-space:nowrap;padding:2px 7px;border-radius:999px;background:color-mix(in srgb,var(--c) 55%,#fff);border:1px solid color-mix(in srgb,var(--c) 80%,#000 6%)}
@media (max-width:640px){.ak .syl ol{grid-template-columns:1fr}}

.ak .vs-scroll{margin-top:24px;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:10px;background:#fff}
.ak .vs{width:100%;min-width:560px;border-collapse:collapse;font-size:.84rem}
.ak .vs th,.ak .vs td{padding:11px 12px;text-align:center;border-bottom:1px solid var(--line);vertical-align:middle}
.ak .vs tr:last-child th,.ak .vs tr:last-child td{border-bottom:0}
.ak .vs thead th{font:500 .72rem "JetBrains Mono",monospace;color:var(--mute);background:var(--paper)}
.ak .vs tbody th{text-align:left;font-weight:500}
.ak .vs .us{background:color-mix(in srgb,var(--yellow) 22%,#fff)}
.ak .vs thead .us{color:var(--ink);font-weight:600;background:var(--yellow)}
.ak .vs-yes svg{width:20px;height:20px;color:#1D8A4E;vertical-align:middle}
.ak .vs-no{color:var(--mute)}

/* ── uptime99 sections (devops.arclab.app, owner request 2026-10-01) ───────
   Shift clock, tools, incident families, course, interview loop. Prefix ops-.
   Static: nothing here waits on landing.js. */
.ak .ops-clock{list-style:none;margin:30px 0 0;padding:0;position:relative}
.ak .ops-clock::before{content:"";position:absolute;left:79px;top:8px;bottom:8px;border-left:2px dashed var(--line)}
.ak .ops-clock li{display:grid;grid-template-columns:64px 32px 1fr;align-items:start;padding:10px 0}
.ak .ops-clock time{font:500 .78rem/1.6 "JetBrains Mono",monospace;color:var(--mute);text-align:right;padding-right:4px}
.ak .ops-dot{width:16px;height:16px;border-radius:50%;background:var(--c);border:3px solid var(--paper);box-shadow:0 0 0 1px rgba(0,0,0,.18);margin:2px 0 0 8px;position:relative}
.ak .ops-clock b{display:block;font:400 1.2rem/1.25 "Instrument Serif",Georgia,serif}
.ak .ops-clock p{font-size:.88rem;line-height:1.55;color:var(--mute);margin-top:2px;max-width:58ch}

.ak .ops-tools{display:grid;gap:clamp(36px,6vw,72px);margin-top:36px}
.ak .ops-tool{display:grid;grid-template-columns:1.45fr 1fr;gap:clamp(20px,4vw,48px);align-items:center}
.ak .ops-tool:nth-child(even) .ops-frame{order:2}
.ak .ops-frame{border-radius:10px;overflow:hidden;border:1px solid rgba(0,0,0,.14);background:#1b1d22;box-shadow:0 26px 50px -28px rgba(0,0,0,.55),8px 8px 0 var(--c)}
.ak .ops-bar{display:flex;align-items:center;gap:6px;padding:8px 10px;background:#2a2c31}
.ak .ops-bar i{width:9px;height:9px;border-radius:50%;background:#5a5d63}
.ak .ops-bar i:first-child{background:#ec6a5e}.ak .ops-bar i:nth-child(2){background:#f4bf4f}.ak .ops-bar i:nth-child(3){background:#61c554}
.ak .ops-bar span{margin-left:8px;flex:1;background:#1b1d22;border-radius:5px;padding:3px 10px;font:400 .68rem "JetBrains Mono",monospace;color:#b6b9bf;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ak .ops-frame img{width:100%;height:auto;aspect-ratio:1800/985;object-fit:cover;object-position:top}
.ak .ops-copy .st{width:46px;height:46px;border-radius:10px;background:#fff;border:2px solid var(--c);display:grid;place-items:center;box-shadow:0 2px 0 rgba(0,0,0,.08);margin-bottom:12px}
.ak .ops-copy .st svg{width:24px;height:24px}
.ak .ops-copy h3{font-size:1.7rem}
.ak .ops-copy p{margin-top:8px;color:var(--mute);font-size:.95rem;line-height:1.6}
.ak .ops-copy ul{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:8px}
.ak .ops-copy li{display:grid;grid-template-columns:20px 1fr;gap:8px;font-size:.88rem;line-height:1.45}
.ak .ops-copy li svg{width:18px;height:18px;color:#1D8A4E;margin-top:1px}
@media (max-width:820px){.ak .ops-tool{grid-template-columns:1fr}.ak .ops-tool:nth-child(even) .ops-frame{order:0}}

.ak .ops-fams{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:30px}
.ak .ops-fam{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 16px 14px;position:relative;overflow:hidden}
.ak .ops-fam::before{content:"";position:absolute;inset:0 0 auto;height:6px;background:var(--c)}
.ak .ops-n{font:400 2.6rem/1 "Instrument Serif",Georgia,serif}
.ak .ops-fam h3{font:600 .72rem "JetBrains Mono",monospace;text-transform:uppercase;letter-spacing:.06em;margin-top:4px;color:var(--mute)}
.ak .ops-fam ul{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:5px}
.ak .ops-fam li{font-size:.74rem;line-height:1.3;padding:3px 7px;border-radius:5px;background:color-mix(in srgb,var(--c) 30%,#fff)}
.ak .ops-fam:last-child{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.ak .ops-fam:last-child h3{color:var(--gray)}
.ak .ops-fam:last-child li{background:rgba(255,255,255,.1)}
@media (max-width:900px){.ak .ops-fams{grid-template-columns:repeat(2,1fr)}}
@media (max-width:440px){.ak .ops-fams{grid-template-columns:1fr}}

.ak .ops-arcs{display:grid;grid-template-columns:1fr 1.6fr;gap:18px;margin-top:30px;align-items:start}
.ak .ops-arc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}
.ak .ops-arc-h{display:grid;grid-template-columns:38px 1fr;gap:12px;align-items:start;padding-bottom:12px;border-bottom:1px solid var(--line)}
.ak .ops-k{width:32px;height:32px;border-radius:8px;border:1.5px solid var(--ink);display:grid;place-items:center;font:500 .8rem "JetBrains Mono",monospace;background:var(--paper)}
.ak .ops-arc-h p{color:var(--mute);font-size:.88rem;margin-top:2px}
.ak .ops-mod{padding:14px 0 4px 50px;border-bottom:1px dashed var(--line)}
.ak .ops-mod:last-child{border-bottom:0}
.ak .ops-mod b{font-weight:600}
.ak .ops-mod p{font-size:.86rem;color:var(--mute);margin-top:2px}
.ak .ops-chips{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 8px}
.ak .ops-chips span{font-size:.74rem;padding:3px 10px;border:1px solid var(--line);border-radius:999px;background:var(--paper)}
.ak .ops-levels{list-style:none;margin:28px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:6px;align-items:center;counter-reset:lv}
.ak .ops-levels li{counter-increment:lv;font:500 .74rem "JetBrains Mono",monospace;padding:6px 10px;border-radius:6px;background:#fff;border:1px solid var(--line)}
.ak .ops-levels li::before{content:counter(lv) " ";color:var(--mute)}
.ak .ops-levels li:not(:last-child)::after{content:"→";margin-left:8px;color:var(--mute)}
.ak .ops-levels li:first-child{background:var(--yellow);border-color:var(--yellow)}
.ak .ops-levels li:last-child{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.ak .ops-comps{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.ak .ops-comps span{font-size:.8rem;padding:4px 10px;border-radius:999px;background:color-mix(in srgb,var(--teal) 45%,#fff)}
@media (max-width:820px){.ak .ops-arcs{grid-template-columns:1fr}}

.ak .ops-hire{display:grid;grid-template-columns:1fr 1.25fr;gap:24px;margin-top:30px;align-items:start}
.ak .ops-steps{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.ak .ops-steps li{display:grid;grid-template-columns:40px 1fr;gap:10px;align-items:start}
.ak .ops-steps b{display:block;font:400 1.2rem/1.25 "Instrument Serif",Georgia,serif}
.ak .ops-steps p{font-size:.86rem;color:var(--mute);margin-top:2px}
.ak .ops-hire .vs-scroll{margin-top:0}
.ak .ops-rubric{min-width:520px}
.ak .ops-rubric th,.ak .ops-rubric td{text-align:left;vertical-align:top}
.ak .ops-rubric td{color:var(--mute)}
.ak .ops-tag{font:500 .66rem "JetBrains Mono",monospace;white-space:nowrap;padding:2px 7px;border-radius:999px;background:color-mix(in srgb,var(--teal) 50%,#fff)}
.ak .ops-limits{margin-top:22px;padding:18px 20px;border-radius:10px;background:color-mix(in srgb,var(--yellow) 35%,#fff);border:1px solid color-mix(in srgb,var(--yellow) 80%,#000 8%)}
.ak .ops-limits b{font-size:1.5rem}
.ak .ops-limits ul{margin:6px 0 14px;padding-left:18px;font-size:.88rem;line-height:1.6}
@media (max-width:900px){.ak .ops-hire{grid-template-columns:1fr}}

/* ── Tile art (Foundations, 2026-10-01): code-window snippets and real
   screenshots in place of the icon-only art boxes. */
.ak .tile .art.snip{height:auto;min-height:150px;display:block;position:relative;padding:12px 12px 26px;background:color-mix(in srgb,var(--c) 45%,var(--tile));overflow:hidden}
.ak .snip-win{background:#1e1e1e;border-radius:6px;overflow:hidden;box-shadow:0 10px 22px -14px rgba(0,0,0,.55);transform:rotate(-1deg)}
.ak .snip-top{display:flex;align-items:center;gap:4px;padding:5px 8px;background:#2a2a2a;font:500 .62rem "JetBrains Mono",monospace;color:#9a948a}
.ak .snip-top i{width:6px;height:6px;border-radius:50%;background:#555}
.ak .snip-top span{margin-left:6px}
.ak .snip-win pre{margin:0;padding:8px 10px;font:500 .66rem/1.55 "JetBrains Mono",monospace;color:#d7d0c3;white-space:pre;overflow:hidden}
.ak .snip-win pre .hl{display:block;margin:0 -10px;padding:0 10px;background:rgba(230,74,46,.35);color:#fff}
.ak .snip-win pre .out{color:#9BC9A0}
.ak .snip-win pre .ans{display:block;margin:2px -10px 0;padding:2px 10px;background:rgba(245,216,66,.18);color:#F5D842;font-family:Caveat,cursive;font-size:.9rem;white-space:normal}
.ak .snip-note{position:absolute;right:12px;bottom:4px;font-size:1.05rem;line-height:1;color:var(--ink);transform:rotate(-2deg)}
.ak .tile .art.art-shot{height:auto;display:block;padding:12px 12px 0;background:var(--c);overflow:hidden}
.ak .tile .art.art-shot img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;object-position:left top;border-radius:5px 5px 0 0;box-shadow:0 10px 22px -14px rgba(0,0,0,.55)}
.ak .tile .art.art-mark{background:var(--red);flex-direction:column;gap:8px;height:auto;min-height:150px;color:#fff}
.ak .tile .art.art-mark img{height:46px;width:auto;filter:brightness(0) invert(1)}
.ak .tile .art.art-mark .hand{font-size:1.25rem}

/* ── Sim sections (sim.arclab.app, owner request 2026-10-01) ───────────────
   Sprint board, filmstrip, chat transcript, grading, uses, interview. Prefix sim-.
   Static: nothing here waits on landing.js. */
.ak .sim-board{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin-top:30px;padding:12px;border-radius:12px;background:#EFE6D6;border:1px solid var(--line)}
.ak .sim-col{display:flex;flex-direction:column;gap:8px;min-width:0}
.ak .sim-col-h{display:flex;flex-direction:column;padding:4px 4px 2px}
.ak .sim-col-h b{font:600 .7rem "JetBrains Mono",monospace;letter-spacing:.06em;text-transform:uppercase}
.ak .sim-col-h span{font:400 1.15rem/1.2 "Instrument Serif",Georgia,serif}
.ak .sim-card{background:#fff;border-radius:8px;border:1px solid rgba(0,0,0,.08);border-top:5px solid var(--c);box-shadow:0 1px 0 rgba(0,0,0,.06);padding:12px;display:flex;flex-direction:column;gap:8px;flex:1}
.ak .sim-key{font:600 .68rem "JetBrains Mono",monospace;color:var(--mute)}
.ak .sim-card p{font-size:.86rem;line-height:1.45}
.ak .sim-skill{margin-top:auto;align-self:flex-start;font:500 .66rem "JetBrains Mono",monospace;padding:3px 8px;border-radius:999px;background:color-mix(in srgb,var(--c) 45%,#fff)}
.ak .sim-unlock{font:500 .66rem "JetBrains Mono",monospace;text-align:center;padding:5px 6px;border-radius:6px;border:1px dashed rgba(0,0,0,.25);color:var(--ink)}
@media (max-width:900px){.ak .sim-board{grid-template-columns:repeat(5,minmax(210px,1fr));overflow-x:auto;-webkit-overflow-scrolling:touch;scroll-snap-type:x mandatory}.ak .sim-col{scroll-snap-align:start}}

.ak .sim-strip{list-style:none;margin:30px 0 0;padding:4px max(var(--ak-pad),calc((100% - var(--ak-max))/2)) 18px;display:grid;grid-auto-flow:column;grid-auto-columns:min(560px,84vw);gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scroll-padding-inline:max(var(--ak-pad),calc((100% - var(--ak-max))/2))}
.ak .sim-strip li{scroll-snap-align:start;display:flex;flex-direction:column}
.ak .sim-strip-tab{align-self:flex-start;display:flex;align-items:center;gap:8px;font:500 .72rem "JetBrains Mono",monospace;padding:6px 12px 6px 6px;border-radius:8px 8px 0 0;background:var(--c)}
.ak .sim-strip-tab span{width:20px;height:20px;border-radius:50%;background:var(--paper);display:grid;place-items:center;font-weight:600}
.ak .sim-strip-frame{border-radius:0 10px 10px 10px;overflow:hidden;border:4px solid var(--c);background:#1b1d22;box-shadow:0 22px 40px -26px rgba(0,0,0,.6)}
.ak .sim-strip-frame img{width:100%;aspect-ratio:1800/985;object-fit:cover;object-position:top left;display:block}
.ak .sim-strip h3{font-size:1.35rem;margin-top:14px}
.ak .sim-strip p{font-size:.88rem;line-height:1.55;color:var(--mute);margin-top:4px}

.ak .sim-day{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(24px,4vw,56px);align-items:start}
.ak .sim-chat{list-style:none;margin:0;padding:18px;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:8px 8px 0 var(--teal);display:grid;gap:14px}
.ak .sim-msg{display:grid;grid-template-columns:34px 1fr;gap:10px}
.ak .sim-av{width:34px;height:34px;border-radius:8px;display:grid;place-items:center;font:600 .9rem Inter,sans-serif;background:var(--yellow)}
.ak .sim-msg.you .sim-av{background:var(--teal)}
.ak .sim-msg.red .sim-av{background:var(--red);color:#fff}
.ak .sim-msg.green .sim-av{background:var(--green)}
.ak .sim-msg-h{display:flex;gap:8px;align-items:baseline;flex-wrap:wrap}
.ak .sim-msg-h b{font-size:.9rem}
.ak .sim-msg-h span{font:400 .68rem "JetBrains Mono",monospace;color:var(--mute)}
.ak .sim-msg p{font-size:.88rem;line-height:1.5;margin-top:2px}
.ak .sim-msg.red p,.ak .sim-msg.green p{font:400 .78rem/1.5 "JetBrains Mono",monospace;padding:8px 10px;border-radius:6px;margin-top:4px;border-left:3px solid var(--red);background:color-mix(in srgb,var(--red) 8%,#fff)}
.ak .sim-msg.green p{border-left-color:#1D8A4E;background:color-mix(in srgb,var(--green) 22%,#fff)}
@media (max-width:860px){.ak .sim-day{grid-template-columns:1fr}}

.ak .sim-grade{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:30px;align-items:start}
.ak .sim-bands{display:grid;gap:10px}
.ak .sim-band{display:grid;grid-template-columns:64px 1fr;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.ak .sim-letter{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;font:400 2rem/1 "Instrument Serif",Georgia,serif;border:2px solid var(--ink);background:var(--paper)}
.ak .sim-band:first-child .sim-letter{background:var(--yellow);box-shadow:0 0 0 5px color-mix(in srgb,var(--yellow) 40%,transparent)}
.ak .sim-band b{font:600 .78rem "JetBrains Mono",monospace}
.ak .sim-band p{font-size:.86rem;color:var(--mute);margin-top:2px}
.ak .sim-costs{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 20px}
.ak .sim-costs h3{font-size:1.35rem}
.ak .sim-costs h3+table,.ak .sim-costs h3+dl{margin-top:8px}
.ak .sim-costs table{width:100%;border-collapse:collapse;font-size:.86rem;margin-bottom:18px}
.ak .sim-costs th,.ak .sim-costs td{padding:8px 0;border-bottom:1px dashed var(--line);text-align:left;font-weight:400}
.ak .sim-costs td{text-align:right;font:500 .78rem "JetBrains Mono",monospace;white-space:nowrap;padding-left:12px}
.ak .sim-costs dl{display:grid;gap:8px;margin:0}
.ak .sim-costs dt{font:600 .74rem "JetBrains Mono",monospace}
.ak .sim-costs dd{margin:0;font-size:.86rem;color:var(--mute)}
@media (max-width:820px){.ak .sim-grade{grid-template-columns:1fr}}

.ak .sim-uses{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}
.ak .sim-use{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;position:relative;overflow:hidden;display:flex;flex-direction:column}
.ak .sim-use::before{content:"";position:absolute;inset:0 0 auto;height:6px;background:var(--c)}
.ak .sim-use-top{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:4px}
.ak .sim-use .st{width:42px;height:42px;border-radius:10px;border:2px solid var(--c);display:grid;place-items:center}
.ak .sim-use .st svg{width:22px;height:22px}
.ak .sim-status{font:500 .66rem "JetBrains Mono",monospace;padding:3px 9px;border-radius:999px;background:color-mix(in srgb,var(--yellow) 55%,#fff);border:1px solid color-mix(in srgb,var(--yellow) 85%,#000 8%)}
.ak .sim-status.ready{background:color-mix(in srgb,var(--green) 45%,#fff);border-color:color-mix(in srgb,var(--green) 85%,#000 8%)}
.ak .sim-use h3{font-size:1.5rem;margin-top:14px}
.ak .sim-use p{font-size:.9rem;line-height:1.55;color:var(--mute);margin-top:6px}
.ak .sim-use ol{list-style:decimal;margin:14px 0 0;padding-left:20px;display:grid;gap:6px;font-size:.86rem;line-height:1.45}
@media (max-width:900px){.ak .sim-uses{grid-template-columns:1fr}}

.ak .sim-timebar{display:flex;gap:4px;margin-top:28px;border-radius:8px;overflow:hidden}
.ak .sim-timebar span{min-width:44px;padding:8px 6px;font:600 .7rem "JetBrains Mono",monospace;text-align:center}
.ak .sim-iv{display:grid;grid-template-columns:1fr 1.1fr;gap:24px;margin-top:22px;align-items:start}
.ak .sim-plan{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.ak .sim-plan li{display:grid;grid-template-columns:36px 1fr;gap:10px;align-items:start}
.ak .sim-plan-n{width:30px;height:30px;border-radius:50%;border:1.5px solid var(--ink);display:grid;place-items:center;font:600 .74rem "JetBrains Mono",monospace;background:#fff}
.ak .sim-plan b{display:block;font:400 1.2rem/1.25 "Instrument Serif",Georgia,serif}
.ak .sim-plan b span{font:500 .68rem "JetBrains Mono",monospace;color:var(--mute);margin-left:6px}
.ak .sim-plan p{font-size:.86rem;line-height:1.5;color:var(--mute);margin-top:2px}
.ak .sim-plan-total{padding-top:10px;border-top:1px dashed var(--line)}
.ak .sim-iv .vs-scroll{margin-top:0}
.ak .sim-signals{min-width:440px}
.ak .sim-signals th,.ak .sim-signals td{text-align:left;vertical-align:top}
.ak .sim-signals td{color:var(--mute)}
.ak .sim-limits{margin-top:18px;padding:16px 18px;border-radius:10px;background:color-mix(in srgb,var(--yellow) 35%,#fff);border:1px solid color-mix(in srgb,var(--yellow) 80%,#000 8%)}
.ak .sim-limits b{font-size:1.5rem}
.ak .sim-limits ul{list-style:disc;margin:6px 0 14px;padding-left:18px;font-size:.86rem;line-height:1.6}
@media (max-width:900px){.ak .sim-iv{grid-template-columns:1fr}}