:root {
  --modal-open-dur: 250ms;
  --modal-close-dur: 150ms;
  --modal-scale: 0.96;
  --modal-scale-close: 0.96;
  --modal-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

.t-modal {
  transform-origin: center;
  transform: scale(var(--modal-scale));
  opacity: 0;
  pointer-events: none;
  transition:
    transform var(--modal-open-dur) var(--modal-ease),
    opacity   var(--modal-open-dur) var(--modal-ease);
  will-change: transform, opacity;
}
.t-modal.is-open {
  transform: scale(1);
  opacity: 1;
  pointer-events: auto;
}
.t-modal.is-closing {
  transform: scale(var(--modal-scale-close));
  opacity: 0;
  pointer-events: none;
  transition:
    transform var(--modal-close-dur) var(--modal-ease),
    opacity   var(--modal-close-dur) var(--modal-ease);
}

@media (prefers-reduced-motion: reduce) {
  .t-modal { transition: none !important; }
}

/* Prototype 4: light-only composition; shared Book 450 and 120px section rhythm. */
:root{color-scheme:light;--duration-stagger:40ms;--duration-fast:250ms;--duration-quick:150ms;--duration-very-slow:500ms;--ease-smooth-out:cubic-bezier(.22,1,.36,1);--ease-in-out:ease-in-out;--hero-stagger:40ms;--hero-h1-at:40;--hero-pill-at:80;--hero-subtitle-at:120;--hero-settle-at:620;--stagger-dur:500ms;--stagger-distance:12px;--stagger-blur:3px;--stagger-ease:ease-in-out}
.hero-announcement,.hero-subtitle{--stagger-dur:500ms;--stagger-distance:12px;--stagger-blur:3px}
.home-logo-story{min-height:calc(100svh - 64px)}
.prototype-controls>span,.grid-column{font-family:var(--font-family);font-weight:450}
.ruler-panel,.ruler-panel button,.ruler-position input,.ruler-handle{font-weight:450}

/* Footer ink fades consistently from top to bottom. */
.site-footer-watermark{mask-image:linear-gradient(to bottom,#000 0%,transparent 100%);-webkit-mask-image:linear-gradient(to bottom,#000 0%,transparent 100%)}

/* Begin the reading section before the hero's trailing empty space. */
@media(min-width:901px){
 #manifesto{margin-top:-120px}
 .site-footer-watermark{inset:0;height:100%;mask-image:linear-gradient(to bottom,#000 0%,transparent 100%);-webkit-mask-image:linear-gradient(to bottom,#000 0%,transparent 100%)}
 .site-footer-wordmark-mask{position:absolute;left:0;right:0;bottom:-68px}
}

/* Plain hero ink; supporting copy follows the app preview. */
.home-content h1.hero-heading,.hero-heading-ink{color:#000829;-webkit-text-fill-color:#000829;background:none;filter:none;text-shadow:none}
.home-content .hero-subtitle{margin:16px 0 0;max-width:600px}
#header.paper-header .nav-cta-primary,.hero-swap-actions :is(button,a){display:flex;align-items:center;justify-content:center;gap:4px;width:fit-content;height:44px;min-height:44px;padding:0 12px 0 20px;border:0;border-radius:999px;background:#0100ff;background-image:none;color:#fff;box-shadow:none;text-shadow:none;font:450 14px/18px var(--font-family);letter-spacing:-.01em}
.nav-cta-primary svg,.hero-swap-actions :is(button,a) svg{display:block;flex-shrink:0;width:16px;height:16px;fill:currentColor;stroke:none}
.hero-swap-actions{display:flex;justify-content:center}
.hero-scroll-cue{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:45;padding-left:16px;cursor:pointer;background:rgb(255 255 255 / 70%);transition:opacity var(--duration-quick) var(--ease-smooth-out)}
.hero-scroll-cue.is-dismissed{opacity:0;pointer-events:none}
@media(prefers-reduced-motion:reduce){.hero-scroll-cue{transition:none}}

/* Keep the reading block toward the top of the pinned desktop panel. */
@media(min-width:901px){#manifesto .manifesto-panel{align-items:flex-start}}

/* Paper primary transaction action, with the requested Get Started label. */
.hero-swap-actions :is(button,a){width:512px;max-width:100%;height:48px;min-height:48px;flex-shrink:0;padding-inline:24px;gap:0;background-color:#0100ff;background-image:linear-gradient(180deg in oklab,rgb(0 8 41 / 2%) 0%,rgb(0 8 41 / 0%) 60%,rgb(0 8 41 / .4%) 100%);background-origin:border-box;border:.5px solid #0100db;border-radius:999px;box-shadow:inset 0 .5px 0 rgb(255 255 255 / 34.9%),inset 0 -1px 1px rgb(13 0 217 / 25%),0 3px 6px -2px rgb(13 0 217 / 10.2%);color:#fff;font:450 16px/20px var(--font-family);letter-spacing:-.01em;text-align:center;text-shadow:0 3px 3px rgb(255 255 255 / 50%)}

.hero-scroll-cue{bottom:40px}

.hero-swap-actions :is(button,a){border-radius:16px}

:root {
  --acc-expand: 250ms;
  --acc-collapse: 250ms;
  --acc-chevron: 250ms;
  --acc-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* grid-template-rows 0fr → 1fr gives a clean height animation
   with no JS measurement; the inner element clips overflow. */
.t-acc-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--acc-collapse) var(--acc-ease);
}
.t-acc[data-open="true"] .t-acc-panel {
  grid-template-rows: 1fr;
  transition: grid-template-rows var(--acc-expand) var(--acc-ease);
}
.t-acc-panel-inner {
  overflow: hidden;
  opacity: 0;
  filter: blur(2px);
  transition:
    opacity var(--acc-collapse) var(--acc-ease),
    filter var(--acc-collapse) var(--acc-ease);
}
.t-acc[data-open="true"] .t-acc-panel-inner {
  opacity: 1;
  filter: blur(0);
  transition:
    opacity var(--acc-expand) var(--acc-ease),
    filter var(--acc-expand) var(--acc-ease);
}
/* Flip the chevron vertically to turn the "v" into a "^".
   scaleY(-1) about the centre passes through a flat line at
   the midpoint (same look as a `d:` path morph) but animates
   in every browser, unlike CSS `d:` morphing (Chromium only).
   The chevron path is symmetric about the 16x16 viewBox
   centre, so the flip lands exactly on the "^"; non-scaling
   -stroke keeps the stroke width constant through the flip. */
.t-acc-chevron {
  display: inline-flex;
  transform: scaleY(1);
  transform-origin: center;
  transition: transform var(--acc-chevron) var(--acc-ease);
}
.t-acc-chevron path { vector-effect: non-scaling-stroke; }
.t-acc[data-open="true"] .t-acc-chevron {
  transform: scaleY(-1);
}

@media (prefers-reduced-motion: reduce) {
  .t-acc-panel, .t-acc-panel-inner, .t-acc-chevron {
    transition: none !important;
  }
}

/* Centered reading stage; circle canvas takes over only after full reveal. */
@media(min-width:901px){#manifesto .manifesto-panel{align-items:center}.manifesto-particles{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:2}.manifesto-paragraphs{position:relative;z-index:1}}
.umbra-guide-item{background:rgb(247 247 247 / 50%)}
.umbra-guide-item:hover{background:rgb(241 242 242 / 50%)}
.t-acc-head{display:flex;align-items:center;justify-content:space-between;width:100%;min-height:68px;padding:18px 24px;gap:24px;border:0;background:transparent;color:var(--faq-ink);font:450 18px/24.75px var(--font-family);letter-spacing:-.025em;text-align:left;cursor:pointer}
.t-acc-chevron{width:16px;height:16px;flex-shrink:0;color:var(--faq-ink)}
.t-acc-head:focus-visible{outline:2px solid #0100ff;outline-offset:-3px;border-radius:16px}

.site-footer-logo{height:auto}.site-footer-logo .umbra-logo{width:120px;height:auto}

@media(min-width:901px){#manifesto p{font-size:44px;line-height:52px}#manifesto .manifesto-paragraphs{grid-column:2/12}}

/* One footer gradient only: the full-height watermark fade. */
.site-footer-bottom-blur{display:none}

.site-footer-watermark{mask-image:linear-gradient(to bottom,#000 0%,#000 35%,transparent 100%);-webkit-mask-image:linear-gradient(to bottom,#000 0%,#000 35%,transparent 100%)}

/* One full-footer overlay above the dot artwork, below footer content. */
.site-footer-watermark{mask-image:none;-webkit-mask-image:none}
.site-footer-watermark::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(to bottom,#fff 0%,rgb(255 255 255 / 85%) 35%,rgb(255 255 255 / 0%) 100%)}

.footer-background-dots{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.site-footer-watermark::after{z-index:2}

#header.paper-header .wordmark .umbra-logo{width:120px;height:auto}

:root {
  --text-swap-dur: 150ms;
  --text-swap-translate-y: 4px;
  --text-swap-blur: 2px;
  --text-swap-ease: ease-in-out;
}

.t-text-swap {
  display: inline-block;
  transform: translateY(0);
  filter: blur(0);
  opacity: 1;
  transition:
    transform var(--text-swap-dur) var(--text-swap-ease),
    filter    var(--text-swap-dur) var(--text-swap-ease),
    opacity   var(--text-swap-dur) var(--text-swap-ease);
  will-change: transform, filter, opacity;
}
.t-text-swap.is-exit {
  transform: translateY(calc(var(--text-swap-translate-y) * -1));
  filter: blur(var(--text-swap-blur));
  opacity: 0;
}
.t-text-swap.is-enter-start {
  transform: translateY(var(--text-swap-translate-y));
  filter: blur(var(--text-swap-blur));
  opacity: 0;
  transition: none;
}

@media (prefers-reduced-motion: reduce) {
  .t-text-swap { transition: none !important; }
}

.nimbus-cta{position:relative;isolation:isolate;overflow:hidden;background:#0100ff;color:#fff;scroll-margin-top:64px}
.nimbus-background{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:-1}
.nimbus-cta-content{position:relative;min-height:440px;padding-block:120px;display:flex;align-items:center;justify-content:space-between;gap:48px}
.nimbus-cta h2{margin:0;max-width:780px;min-height:122px;font:450 clamp(48px,3.6vw,64px)/1 var(--font-family);letter-spacing:-.02em;color:#fff}
.nimbus-cta-actions{display:flex;align-items:center;gap:16px;flex-shrink:0}
.nimbus-cta-actions button{height:48px;padding:0 20px;display:flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;font:450 16px/20px var(--font-family);letter-spacing:-.01em;white-space:nowrap}
.nimbus-primary{background:#fff;color:#0100ff;min-width:212px}.nimbus-secondary{background:rgb(255 255 255 / 18%);color:#fff;min-width:194px}
.nimbus-primary img{display:block;width:20px;height:20px}
.nimbus-cta-switch{position:absolute;top:24px;right:24px;display:flex;padding:3px;border-radius:999px;background:rgb(255 255 255 / 12%)}
.nimbus-cta-switch button{border:0;border-radius:999px;background:none;color:#fff;padding:7px 16px;font:450 14px/20px var(--font-family)}
.nimbus-cta-switch button[aria-pressed=true]{background:#fff;color:#0100ff}
.nimbus-pause{position:absolute;bottom:20px;right:24px;border:1px solid #ffffff40;background:#0100ff80;color:#fff;padding:6px 12px;border-radius:999px;font:450 12px/16px var(--font-family)}
.nimbus-cta button:focus-visible{outline:2px solid #fff;outline-offset:4px}

.nimbus-cta-switch{top:auto;bottom:24px;right:24px;gap:12px;padding:8px 12px;background:#fff;border-radius:999px}
.nimbus-cta-switch button{padding:0;width:14px;height:14px;border-radius:50%;background:#ebebeb}
.nimbus-cta-switch button[aria-pressed=true]{background:#395fff}
.nimbus-cta-switch button:focus-visible{outline-color:#0100ff;outline-offset:3px}
.nimbus-pause{right:120px;bottom:27px}
/* Match the selected Paper banner's dimensions and type. */
.nimbus-cta{background:#0000ff}.nimbus-cta-content{max-width:1440px;min-height:378px;height:378px;padding:128px 64px;gap:64px;justify-content:flex-start}
.nimbus-cta h2{font-size:56px;line-height:60px;width:720px;max-width:720px;min-height:120px;flex-shrink:0}
.nimbus-primary,.nimbus-secondary{min-width:0}.nimbus-secondary{backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.nimbus-cta-switch{background:transparent;gap:4px}.nimbus-cta-switch button{width:10px;height:10px;background:rgb(235 235 235 / 40%)}.nimbus-cta-switch button[aria-pressed=true]{background:#ebebeb}

/* Palette sampled from the supplied animation recording. */
.nimbus-cta{background:#0500fe}

.nimbus-cta-switch{flex-direction:column;gap:5px;padding:4px;right:24px;bottom:24px}.nimbus-cta-switch button{width:5px;height:5px}.nimbus-pause{right:48px}

/* CTA heading shares the navbar container’s outer content edge. */
.nimbus-cta-content{max-width:1448px;padding-inline:24px}.nimbus-cta-switch button{width:4px;height:4px}.nimbus-cta-switch{gap:4px;padding:4px}

.nimbus-cta-switch{left:50%;right:auto;transform:translateX(-50%)}

/* Red authoring guides and selected ruler handles. */
.ruler-guide{color:#ff3344}.ruler-guide.is-selected .ruler-handle{background:#ff3344;border-color:#ff3344;color:#fff}

/* Permanent placement captured from the user’s ruler intersection. */
.nimbus-cta-switch{left:auto;right:24.5px;top:189.8px;bottom:auto;transform:translate(50%,-50%)}
/* Local navbar theme follows dark Nimbus sections without changing the page theme. */
#header.paper-header.over-dark-section{--paper-text:#f4f4f7;--paper-text-secondary:#d0d3dd;--paper-muted:#b8bdca;--paper-surface:#ffffff0d;--paper-border:#ffffff1a}
#header.paper-header.over-dark-section::before{background:rgb(11 12 16 / 75%)}
#header.paper-header.over-dark-section .wordmark img{filter:brightness(0) invert(1)}
#header.paper-header.over-dark-section .paper-nav-menu{background:rgb(21 23 29 / 90%);box-shadow:0 12px 32px -8px #0008}

/* App destinations preserve the existing CTA presentation. */
.nav-cta-primary,.hero-swap-actions a,.mobile-hero-action a{text-decoration:none;cursor:pointer}
.mobile-hero-action a{display:flex;align-items:center;justify-content:center}
.hero-swap-actions a:focus-visible,.mobile-hero-action a:focus-visible{outline:2px solid #0100ff;outline-offset:3px}

/* FAQ documentation links retain Umbra blue in every interaction state. */
#umbra-guide a{color:#0100ff}

/* FAQ live page previews sit outside clipped accordion panels. */
:root{--faq-preview-width:300px;--faq-preview-height:216px;--faq-preview-delay:220ms;--faq-preview-in:var(--duration-quick,150ms);--faq-preview-out:50ms}
.faq-link-preview{position:fixed;z-index:1100;box-sizing:border-box;height:var(--faq-preview-height);padding:8px;border:1px solid rgb(0 8 41 / 9%);border-radius:16px;background:rgb(255 255 255 / 92%);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:#000829;box-shadow:0 12px 28px -8px rgb(0 8 41 / 16%),0 2px 6px rgb(0 8 41 / 4%);opacity:0;visibility:hidden;pointer-events:none;transform:scale(.98);transform-origin:center bottom;transition:opacity var(--faq-preview-out) ease-out,transform var(--faq-preview-out) ease-out,visibility 0s var(--faq-preview-out);font:450 12px/16px var(--font-family);letter-spacing:-.01em}
.faq-link-preview[data-side=below]{transform-origin:center top}
.faq-link-preview[data-show=true]{opacity:1;visibility:visible;pointer-events:auto;transform:scale(1);transition:opacity var(--faq-preview-in) var(--ease-smooth-out,ease-out),transform var(--faq-preview-in) var(--ease-smooth-out,ease-out),visibility 0s}
.faq-link-preview::before{content:'';position:absolute;left:0;right:0;height:12px;bottom:-12px}
.faq-link-preview[data-side=below]::before{top:-12px;bottom:auto}
.faq-link-preview-header{display:flex;align-items:center;gap:10px;height:40px;margin-bottom:8px;padding:0 4px}
.faq-link-preview-icon{display:block;flex:none;width:20px;height:20px;box-sizing:content-box;padding:6px;border-radius:8px;background:rgb(1 0 255 / 5%)}
.faq-link-preview-icon::before{content:'';display:block;width:20px;height:20px;background:#0100ff;mask:url('/prototype-4/assets/nav-icons/nimbus-docs.svg') center/20px 20px no-repeat;-webkit-mask:url('/prototype-4/assets/nav-icons/nimbus-docs.svg') center/20px 20px no-repeat}
.faq-link-preview-copy{min-width:0;flex:1}
.faq-link-preview-title{display:block;margin:0;padding:0;font:450 14px/18px var(--font-family);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.faq-link-preview-address{display:block;margin-top:2px;padding:0;color:#636a6b;font:450 10px/14px var(--font-family);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.faq-link-preview-viewport{position:relative;overflow:hidden;height:150px;border:1px solid rgb(0 8 41 / 7%);border-radius:10px;background:#f7f7f7}
.faq-link-preview iframe{display:block;border:0;width:1056px;height:640px;transform:scale(var(--faq-preview-scale,.267));transform-origin:top left;pointer-events:none;opacity:0}
.faq-link-preview[data-loaded=true] iframe{opacity:1}
.faq-link-preview-status{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:16px;color:#636a6b;font:450 12px/18px var(--font-family);text-align:center}
.faq-link-preview[data-loaded=true] .faq-link-preview-status{display:none}
@media(prefers-reduced-motion:reduce){.faq-link-preview,.faq-link-preview[data-show=true]{transition:none;transform:none}}

/* Three footer groups after removing About. */
@media(min-width:901px){.site-footer-nav{grid-template-columns:repeat(3,minmax(0,1fr))}.site-footer-column{grid-column:span 1}}

.paper-nav-menu button[aria-disabled="true"]{cursor:default}
.site-footer-column .footer-coming-soon{opacity:1;cursor:default}
.footer-coming-soon small{display:block;margin-top:4px;font-size:12px;line-height:16px;color:var(--footer-muted)}

/* Availability badges share a compact pill treatment in menus and footer. */
.paper-menu-copy .coming-soon-pill,.footer-coming-soon .coming-soon-pill{display:inline-flex;align-items:center;width:fit-content;min-height:20px;padding:2px 8px;margin-top:5px;border-radius:999px;background:rgb(1 0 255 / 7%);color:#514bc5;font:450 11px/16px var(--font-family);white-space:nowrap}