/* AIForThisJob: premium, quiet, fast. No external fonts or libraries. */
:root{
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text",Inter,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --bg:#fbfbfd;--bg-soft:#f5f5f7;--card:#fff;--ink:#1d1d1f;--muted:#5f5f64;--line:rgba(0,0,0,.09);
  --accent:#0066cc;--accent-hover:#0071e3;--accent-ink:#fff;--accent-soft:rgba(0,113,227,.09);
  --ok:#1a7f37;--bad:#c4281c;--warn-bg:#fff8e6;--warn-line:#f0d9a0;
  --dark-bg:#000;--dark-ink:#f5f5f7;--dark-muted:#a1a1a6;--dark-card:#1c1c1e;
  --radius:22px;--radius-s:14px;--shadow:0 1px 2px rgba(0,0,0,.04),0 8px 28px rgba(0,0,0,.06);
  --shadow-hover:0 2px 4px rgba(0,0,0,.05),0 18px 44px rgba(0,0,0,.10);
  --nav-h:52px;--ease:cubic-bezier(.22,.61,.36,1);
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#000;--bg-soft:#101012;--card:#1c1c1e;--ink:#f5f5f7;--muted:#a1a1a6;--line:rgba(255,255,255,.12);
  --accent:#2997ff;--accent-hover:#47a6ff;--accent-ink:#000;--accent-soft:rgba(41,151,255,.14);
  --ok:#3fb950;--bad:#ff6b5e;--warn-bg:#2a2210;--warn-line:#5c4a1c;
  --dark-bg:#161618;--dark-card:#242426;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 28px rgba(0,0,0,.35);--shadow-hover:0 2px 4px rgba(0,0,0,.5),0 18px 44px rgba(0,0,0,.5);
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--nav-h) + 24px)}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;font:17px/1.6 var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:clip}
a{color:var(--accent);text-underline-offset:.18em}a:hover{color:var(--accent-hover)}
img{max-width:100%}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px}.skip:focus{top:12px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}.narrow{max-width:820px}
.section{padding:88px 24px}
.wrap.section{padding-left:24px;padding-right:24px}
h1,h2,h3{letter-spacing:-.022em;line-height:1.1;font-weight:700}
h1{font-size:clamp(2.2rem,5vw,3.4rem);margin:.2em 0 .35em}
h2{font-size:clamp(1.5rem,2.6vw,2rem);margin:1.9em 0 .55em}
h3{font-size:1.18rem;margin:.25em 0 .4em;letter-spacing:-.012em;line-height:1.25}
.display{font-size:clamp(2.7rem,8vw,5.6rem);line-height:1.02;letter-spacing:-.035em;margin:.12em 0 .3em}
.display-s{font-size:clamp(2.2rem,5.4vw,3.6rem);line-height:1.06;letter-spacing:-.03em}
.lede{font-size:clamp(1.12rem,1.6vw,1.32rem);line-height:1.5;color:var(--muted);max-width:720px}
.muted{color:var(--muted)}.small{font-size:.92rem}
.eyebrow{font-size:.84rem;font-weight:600;letter-spacing:.02em;color:var(--muted);margin:0}
.grad{background:linear-gradient(90deg,#0066cc,#7a3ff2 55%,#d0367a);-webkit-background-clip:text;background-clip:text;color:transparent}
@media (prefers-color-scheme:dark){.grad{background-image:linear-gradient(90deg,#2997ff,#a77bff 55%,#ff6fa6)}}
.preview-bar{background:#1d1d1f;color:#f5f5f7;text-align:center;font-size:.8rem;padding:6px 12px}

/* Nav: sticky, translucent, blurred */
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,251,253,.72);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line)}
@media (prefers-color-scheme:dark){.site-header{background:rgba(22,22,23,.72)}}
.nav{display:flex;align-items:center;gap:20px;min-height:var(--nav-h)}
.logo{display:inline-flex;align-items:center;gap:1px;font-weight:700;font-size:1.05rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em;white-space:nowrap}
.logo-mark{background:var(--ink);color:var(--bg);border-radius:7px;padding:0 6px;margin-right:3px;font-size:.92rem;line-height:1.5}
.nav-links{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{color:var(--ink);opacity:.82;text-decoration:none;font-size:.86rem;padding:6px 10px;border-radius:999px;white-space:nowrap;transition:opacity .2s,background-color .2s}
.nav-links a:hover{opacity:1;background:var(--accent-soft)}
.nav-links a[aria-current=page]{opacity:1;font-weight:600}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.progress span{display:block;height:100%;background:var(--accent);transform-origin:0 50%;transform:scaleX(var(--p,0))}
@supports (animation-timeline:scroll()){.progress span{animation:grow linear both;animation-timeline:scroll(root)}}
@keyframes grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:6px;background:var(--accent);color:var(--accent-ink)!important;border:0;border-radius:999px;padding:11px 22px;font:600 1rem/1.2 var(--font);text-decoration:none;cursor:pointer;transition:background-color .2s,transform .2s var(--ease)}
.btn:hover{background:var(--accent-hover)}
.btn:active{transform:scale(.98)}
.btn-lg{padding:15px 28px;font-size:1.06rem}.btn-sm{padding:7px 15px;font-size:.88rem}
.btn-ghost{background:transparent;color:var(--accent)!important;box-shadow:inset 0 0 0 1.5px currentColor}
.btn-ghost:hover{background:var(--accent-soft)}
.btn-disabled,.btn-disabled:hover{background:var(--bg-soft);color:var(--muted)!important;box-shadow:inset 0 0 0 1px var(--line);cursor:not-allowed}
.nav-cta{flex:none}
/* Desktop: the wrapper disappears so Newsletter stays a normal nav item. Buy is mobile-only. */
.nav-tools{display:contents}
.nav-buy{display:none}

/* Floating Buy packs control. Visible without JS; site.js hides it while a pack Buy button is on screen. */
.buy-fab{
  position:fixed;z-index:40;
  right:max(16px,env(safe-area-inset-right,0px));
  bottom:max(16px,env(safe-area-inset-bottom,0px));
  flex-direction:column;align-items:center;gap:1px;
  min-height:44px;min-width:44px;padding:8px 14px 9px;
  box-shadow:var(--shadow-hover);
  line-height:1.15;white-space:nowrap;
}
.buy-fab-note{font-size:.72rem;font-weight:500;letter-spacing:-.011em;line-height:1.2}
.buy-fab.is-hidden{visibility:hidden;opacity:0;pointer-events:none}
.buy-fab:focus-visible{outline-color:var(--ink)}
@media (prefers-reduced-motion:no-preference){
  .buy-fab{transition:opacity .2s var(--ease),visibility .2s,background-color .2s}
}
/* Keep the pill behind fields and the top banners, and clear of the page end. */
.newsletter-form,.calc-form,.status-banner{position:relative;z-index:45}
body:has(input:focus,textarea:focus,select:focus) .buy-fab{visibility:hidden;opacity:0;pointer-events:none}
body:has(.buy-fab) .site-footer{padding-bottom:calc(92px + env(safe-area-inset-bottom,0px))}
html:has(.buy-fab){scroll-padding-bottom:calc(92px + env(safe-area-inset-bottom,0px))}

/* Hero with parallax layers */
.hero,.section-hero{position:relative;overflow:hidden;isolation:isolate}
.hero{padding:clamp(80px,13vw,168px) 0 clamp(72px,10vw,128px);text-align:center}
.hero .lede{margin:0 auto}
.hero-inner{position:relative}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin:34px 0 26px}
.trust{display:flex;gap:10px 26px;justify-content:center;flex-wrap:wrap;list-style:none;padding:0;margin:0;color:var(--muted);font-size:.92rem}
.trust li:before{content:"✓";color:var(--ok);font-weight:700;margin-right:6px}
.layers{position:absolute;inset:-10% -5% -30%;z-index:-1;pointer-events:none}
.layer{position:absolute;border-radius:50%;filter:blur(60px);opacity:.55;will-change:transform;transform:translate3d(0,var(--y,0),0)}
.l1{width:46vw;height:46vw;max-width:620px;max-height:620px;left:-8%;top:-12%;background:radial-gradient(circle,#9cc7ff,transparent 68%)}
.l2{width:40vw;height:40vw;max-width:540px;max-height:540px;right:-6%;top:4%;background:radial-gradient(circle,#d9c2ff,transparent 68%)}
.l3{width:30vw;height:30vw;max-width:420px;max-height:420px;left:38%;top:46%;background:radial-gradient(circle,#ffd0e3,transparent 68%)}
.grid-lines{inset:0;border-radius:0;filter:none;opacity:.5;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px;-webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 10%,transparent 65%);mask-image:radial-gradient(ellipse at 50% 30%,#000 10%,transparent 65%)}
@media (prefers-color-scheme:dark){.layer{opacity:.32}.grid-lines{opacity:.6}}
.section-hero{padding:72px 0 64px}
.section-hero .layer{opacity:.35}
.band-dark.section-hero .layer{opacity:.22}

/* Bands */
.band-soft{background:var(--bg-soft)}
.band-light{background:var(--bg)}
.band-dark{background:var(--dark-bg);color:var(--dark-ink);--muted:var(--dark-muted);--card:var(--dark-card);--line:rgba(255,255,255,.14);--accent:#2997ff;--accent-hover:#47a6ff;--accent-ink:#000;--accent-soft:rgba(41,151,255,.16)}
.band-dark .tag{background:rgba(255,255,255,.1);color:#f5f5f7}

/* Sticky stacked panels on home */
.panels{position:relative}
.panel{min-height:auto;border-top:1px solid var(--line)}
.panel-inner{display:grid;grid-template-columns:1.25fr 1fr;gap:56px;align-items:center;padding-top:96px;padding-bottom:96px}
.panel-h{font-size:clamp(2.2rem,5vw,3.8rem);line-height:1.04;letter-spacing:-.032em;margin:.2em 0 .35em}
.panel .lede{margin-bottom:28px}
.panel-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.panel-list li{border-bottom:1px solid var(--line)}
.panel-list a{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:18px 4px;color:inherit;text-decoration:none;font-weight:600;font-size:1.06rem;transition:color .2s,padding .3s var(--ease)}
.panel-list a span{color:var(--muted);font-size:1.4rem;line-height:1}
.panel-list a:hover{color:var(--accent);padding-left:10px}
@media (min-width:900px){
  .panel{position:sticky;top:var(--nav-h);min-height:calc(100vh - var(--nav-h));display:flex;align-items:center;box-shadow:0 -24px 48px rgba(0,0,0,.06)}
  .panel>.wrap{width:100%}
}

/* Section heads, grids, cards */
.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.section-head h2{margin:0}
.section-head a{font-weight:600;text-decoration:none}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.card,.cat{display:flex;flex-direction:column;background:var(--card);border-radius:var(--radius);padding:28px;color:var(--ink);text-decoration:none;box-shadow:var(--shadow);border:1px solid var(--line);transition:transform .45s var(--ease),box-shadow .45s var(--ease)}
.band-dark .card{color:var(--dark-ink)}
.card:hover,.cat:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);color:var(--ink)}
.card h3,.cat h3{margin-top:12px}
.card p,.cat p{color:var(--muted);margin:.2em 0 1.1em;font-size:.98rem;flex:1}
.more{color:var(--accent);font-weight:600;font-size:.94rem}
.count{font-size:.86rem;color:var(--muted);font-weight:600}
.cat h3{margin-top:0}
.tag{display:inline-block;align-self:flex-start;background:var(--accent-soft);color:var(--accent);font-size:.76rem;font-weight:600;border-radius:999px;padding:4px 11px;text-decoration:none;letter-spacing:.01em}
a.tag:hover{filter:brightness(1.1)}
.tag-guide{background:var(--bg-soft);color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.tags{display:flex;gap:8px;flex-wrap:wrap}
.list-h{font-size:1.3rem;margin:2.2em 0 .9em}.scroll-col .list-h:first-child{margin-top:0}

/* Sticky two-column section layout */
.sticky-layout{display:grid;grid-template-columns:minmax(260px,330px) 1fr;gap:48px;align-items:start}
.sticky-col .sticky-inner{position:sticky;top:calc(var(--nav-h) + 28px)}
.sticky-col .callout{margin-top:0}

/* Breadcrumbs */
.crumbs{font-size:.84rem;color:var(--muted);margin-bottom:18px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--accent)}
.crumbs .sep{opacity:.6}

/* Article */
.article-hero{padding:64px 0 32px}
.article-hero .tags{margin:4px 0 8px}
.article-head{padding-bottom:0}
.meta a{font-weight:600}
.article-grid{display:grid;grid-template-columns:220px minmax(0,780px);gap:56px;justify-content:center;padding-bottom:72px}
.toc-inner{position:sticky;top:calc(var(--nav-h) + 28px);font-size:.9rem}
.toc-h{font-weight:600;margin:0 0 8px;color:var(--muted);font-size:.8rem;letter-spacing:.04em;text-transform:uppercase}
.toc ul{list-style:none;margin:0 0 18px;padding:0;border-left:1px solid var(--line)}
.toc li a{display:block;padding:5px 0 5px 14px;margin-left:-1px;border-left:2px solid transparent;color:var(--muted);text-decoration:none}
.toc li a:hover,.toc li a.active{color:var(--ink);border-left-color:var(--accent)}
.article{font-size:1.06rem;min-width:0}
.article h2{font-size:1.55rem;margin-top:2em}
.article ul,.article ol{padding-left:1.2em}.article li{margin:.4em 0}
.prose p,.prose li{max-width:72ch}
.callout{background:var(--bg-soft);border-radius:var(--radius-s);padding:18px 22px;margin:22px 0;border:1px solid var(--line)}
.callout.warn{background:var(--warn-bg);border-color:var(--warn-line)}
.disclaimer{font-size:.95rem}
.glance{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:22px 0}
.glance>div{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-s);padding:16px 18px;box-shadow:var(--shadow)}
.glance span{font-size:.78rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.glance p{margin:.3em 0 0;font-size:.97rem}
.table-wrap{overflow-x:auto;margin:20px 0;border:1px solid var(--line);border-radius:var(--radius-s)}
table{border-collapse:collapse;width:100%;font-size:.96rem}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--bg-soft);font-weight:600}tr:last-child td{border-bottom:0}
.checklist{list-style:none;padding-left:0!important}
.checklist li{position:relative;padding-left:30px}
.checklist li:before{content:"";position:absolute;left:0;top:.28em;width:18px;height:18px;border-radius:6px;box-shadow:inset 0 0 0 1.5px var(--muted)}

/* Prompt block */
.prompt-block{margin:2.4em 0;padding:26px;border-radius:var(--radius);background:var(--bg-soft);border:1px solid var(--line)}
.prompt-block h2{margin-top:0}
.prompt-details summary{display:flex;align-items:center;gap:14px;cursor:pointer;list-style:none}
.prompt-details summary::-webkit-details-marker{display:none}
.prompt-details summary .btn:after{content:"↓";margin-left:4px;transition:transform .3s var(--ease)}
.prompt-details[open] summary .btn:after{transform:rotate(180deg)}
.prompt-details summary .btn{flex:none;white-space:nowrap}
.peek{font-family:var(--mono);font-size:.84rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.prompt-details[open] .peek{visibility:hidden}
.prompt-wrap{position:relative;margin-top:16px}
.copy{position:absolute;top:12px;right:12px;background:rgba(255,255,255,.08);color:#f5f5f7!important;box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}
.copy:hover{background:rgba(255,255,255,.16)}
pre.prompt{background:#1d1d1f;color:#f5f5f7;border-radius:var(--radius-s);padding:56px 22px 22px;overflow:auto;font:.86rem/1.6 var(--mono);white-space:pre-wrap;margin:0}
@media (prefers-color-scheme:dark){pre.prompt{background:#0b0b0c;border:1px solid var(--line)}}
.sources{font-size:.93rem}.sources li{margin:.45em 0}
.kind{font-size:.72rem;background:var(--bg-soft);color:var(--muted);border-radius:6px;padding:2px 8px;margin-left:4px;white-space:nowrap;border:1px solid var(--line)}

/* Latest timeline */
.timeline{list-style:none;padding:0;margin:40px 0 0;border-left:1px solid var(--line)}
.timeline li{position:relative;padding:0 0 30px 28px}
.timeline li:before{content:"";position:absolute;left:-5px;top:7px;width:9px;height:9px;border-radius:50%;background:var(--accent)}
.timeline time{font-size:.84rem;color:var(--muted);font-weight:600}
.timeline a{display:grid;gap:4px;margin-top:6px;padding:20px 22px;border-radius:var(--radius-s);background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);text-decoration:none;color:var(--ink);transition:transform .45s var(--ease),box-shadow .45s var(--ease)}
.timeline a:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.timeline strong{font-size:1.12rem;letter-spacing:-.01em}

/* Filters */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:28px 0 30px}
.chip{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:8px 16px;cursor:pointer;font:500 .9rem var(--font);transition:background-color .2s}
.chip:hover{background:var(--bg-soft)}
.chip.active{background:var(--ink);color:var(--bg);border-color:var(--ink)}

/* Signup */
.signup-inner{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center;padding:96px 24px}
.signup h2{margin:.2em 0 .4em;font-size:clamp(1.9rem,4vw,2.8rem)}
.signup p{color:var(--muted)}
.newsletter-form{display:flex;flex-wrap:wrap;gap:10px}
.newsletter-form input[type=email]{flex:1 1 220px;padding:13px 18px;border-radius:999px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);color:#f5f5f7;font:1rem var(--font)}
.newsletter-form input::placeholder{color:#a1a1a6}
.form-note{flex-basis:100%;font-size:.85rem;margin:6px 0 0}
.form-note a{color:#2997ff}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.status-banner{background:#e9f7ee;color:#0f5132;border-bottom:1px solid #b5e3c4;padding:12px 20px;text-align:center}

/* Calculator */
.calc{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:32px 0}
.calc-form,.calc-out{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.calc-form{display:grid;gap:16px}
.calc-form label{display:grid;gap:7px;font-weight:600;font-size:.93rem}
.calc-form input{padding:12px 14px;border:1px solid var(--line);border-radius:12px;font:1rem var(--font);background:var(--bg);color:var(--ink)}
.calc-out{display:grid;gap:6px;align-content:start;align-self:start;position:sticky;top:calc(var(--nav-h) + 24px)}
.metric{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding:10px 0}.metric span{color:var(--muted)}
.metric strong{font-variant-numeric:tabular-nums}
.metric.big strong{font-size:1.6rem;letter-spacing:-.02em;color:var(--ok)}.metric strong.neg{color:var(--bad)}

/* Packs */
.packs{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px;margin:32px 0}
.billing-note{margin:16px 0 0;font-size:1.02rem;font-weight:600;line-height:1.35;color:var(--ink)}
.card.pack p.price{color:var(--ink);flex:none;font-size:2rem;font-weight:700;letter-spacing:-.02em;margin:0}
.pack-offer{display:flex;flex-direction:column;align-items:stretch;gap:8px;margin:2px 0 12px}
.card.pack p.billing-note{flex:none;margin:0;font-size:.92rem;font-weight:600;line-height:1.35;color:var(--ink)}
.pack .btn{min-height:44px;justify-content:center}
.card.pack .buy-note{flex:none;font-size:.82rem;color:var(--muted);margin:0 0 12px;line-height:1.4}
.fine-print{font-size:.9rem;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-s);padding:14px 18px}

/* Footer */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:56px 0 28px;font-size:.88rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.footer-h{font-size:.8rem;font-weight:600;margin:0 0 10px;letter-spacing:0;color:var(--ink)}
.footer-grid a{display:block;color:var(--muted);text-decoration:none;margin:.38em 0}.footer-grid a:hover{color:var(--ink);text-decoration:underline}
.footer-grid a.logo{display:inline-flex;color:var(--ink)}
.fine{font-size:.78rem;color:var(--muted);padding-top:28px;margin-top:28px;border-top:1px solid var(--line)}

/* Scroll reveal (only when JS is on and motion is OK; content is visible otherwise) */
@media (prefers-reduced-motion:no-preference){
  .js .reveal{opacity:0;transform:translate3d(0,28px,0);transition:opacity .8s var(--ease),transform .8s var(--ease);transition-delay:calc(var(--i,0) * 70ms)}
  .js .reveal.in{opacity:1;transform:none}
  .js .reveal.done{transition:transform .45s var(--ease),box-shadow .45s var(--ease);transition-delay:0s}
  @supports (animation-timeline:view()){
    .hero-inner{animation:heroOut linear both;animation-timeline:view();animation-range:exit 0% exit 100%}
    @keyframes heroOut{to{opacity:.15;transform:translate3d(0,-40px,0) scale(.97)}}
    .layers .layer{animation:drift linear both;animation-timeline:scroll(root);animation-range:0 120vh}
    @keyframes drift{to{transform:translate3d(0,calc(var(--depth,1) * 180px),0)}}
    .l1{--depth:.5}.l2{--depth:.9}.l3{--depth:1.4}.grid-lines{--depth:.25}
  }
}
@media (prefers-reduced-motion:reduce){
  *,*:before,*:after{animation:none!important;transition:none!important}
  .layer{transform:none!important}
  .card:hover,.cat:hover,.timeline a:hover{transform:none}
}

/* Responsive */
@media (max-width:1020px){
  .article-grid{grid-template-columns:minmax(0,1fr);gap:0}
  .toc,.toc-spacer{display:none}
  .sticky-layout{grid-template-columns:1fr;gap:8px}
  .sticky-col .sticky-inner{position:static}
}
@media (max-width:820px){
  body{font-size:16px}
  .wrap{padding:0 20px}.section,.wrap.section{padding:60px 20px}
  .nav{flex-wrap:wrap;gap:0 12px;padding-top:8px}
  .nav-links{order:3;flex-basis:100%;margin:0 -20px;padding:4px 14px 8px;-webkit-mask-image:linear-gradient(90deg,#000 88%,transparent);mask-image:linear-gradient(90deg,#000 88%,transparent)}
  .nav-tools{display:flex;align-items:center;gap:8px;margin-left:auto;flex:none}
  .nav-buy{display:inline-flex;margin-left:0;min-height:44px;min-width:44px;padding:10px 16px}
  .nav-cta{margin-left:0}
  :root{--nav-h:112px}
  .panel-inner{grid-template-columns:1fr;gap:28px;padding-top:64px;padding-bottom:64px}
  .signup-inner,.calc{grid-template-columns:1fr;gap:24px}
  .signup-inner{padding:64px 20px}
  .calc-out{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}
  .glance{grid-template-columns:1fr}
  .card,.cat{padding:22px}
  .prompt-block{padding:20px}
  .peek{display:none}
  .article-hero{padding:40px 0 16px}
  .hero-cta .btn{flex:1 1 auto;justify-content:center}
}
/* Buy + Newsletter no longer fit beside the logo. Keep them together on their own row. */
@media (max-width:359px){
  .nav-tools{flex-basis:100%;margin-left:0}
  :root{--nav-h:156px}
}
@media print{.site-header,.signup,.site-footer,.layers,.toc,.preview-bar,.buy-fab{display:none}.js .reveal{opacity:1;transform:none}details{display:block}}