/* Notia — colour system
   Base: indigo (the app's own hue, ~243°). Accent: amber (~38°), a split-complement
   of indigo, used sparingly for focus points. Neutrals are warm to balance the cool brand. */
:root{
  --paper:#f7f5f0; --paper-2:#eeebe3; --line:#d8d3c7;
  --ink:#16132b; --ink-2:#4a4662;
  --indigo:#4f46e5; --indigo-hover:#3f37c9; --indigo-deep:#2b2380; --lilac:#e9e6fb;
  --amber:#f5b83a; --amber-ink:#8a5a00;
  --night:#0f0e17; --night-2:#1a1926; --night-line:#2e2c42; --night-text:#ece9f7; --night-mute:#aaa6c6;
  --max:1180px; --serif:"Instrument Serif",Georgia,"Times New Roman",serif;
  --sans:"Instrument Sans",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
button{font:inherit}
h1,h2,h3{font-family:var(--serif);font-weight:400;margin:0;letter-spacing:-.015em}
p{margin:0}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--max);margin:0 auto;padding-left:24px;padding-right:24px}
.skip-link{position:absolute;left:-9999px;top:8px;background:#fff;padding:8px 12px;z-index:100}
.skip-link:focus{left:8px}

/* scroll progress */
.progress{position:fixed;inset:0 0 auto 0;height:3px;background:var(--amber);transform-origin:0 50%;transform:scaleX(var(--p,0));z-index:60;pointer-events:none}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid transparent;transition:border-color .25s,box-shadow .25s}
.site-header.is-scrolled{border-bottom-color:var(--line)}
.header-inner{max-width:var(--max);margin:0 auto;height:72px;padding:0 24px;display:flex;align-items:center;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--serif);font-size:30px;line-height:1;letter-spacing:-.01em}
.brand-mark{display:block;width:32px;height:32px}
.brand-mark img{width:32px;height:32px;border-radius:8px}
.desktop-nav{display:flex;gap:28px;margin-left:auto}
.desktop-nav a,.footer-top{font-size:14.5px;font-weight:500;text-decoration:none;color:var(--ink-2);background:linear-gradient(currentColor,currentColor) 0 100%/0 1.5px no-repeat;padding-bottom:3px;transition:background-size .3s var(--ease),color .2s}
.desktop-nav a:hover,.footer-top:hover{color:var(--indigo);background-size:100% 1.5px}
.header-actions{display:flex;align-items:center;gap:12px}
.language-toggle{border:1px solid var(--line);border-radius:6px;min-width:44px;padding:7px 10px;background:transparent;color:var(--ink);cursor:pointer;font-weight:700;font-size:13px;transition:border-color .2s,background .2s}
.language-toggle:hover{border-color:var(--ink);background:var(--paper-2)}

/* buttons */
.button{display:inline-flex;justify-content:center;align-items:center;gap:10px;min-height:50px;padding:12px 22px;background:var(--indigo);color:#fff;border:1px solid var(--indigo);border-radius:6px;text-decoration:none;font-weight:600;font-size:15px;line-height:1.3;cursor:pointer;transition:background .2s,border-color .2s,transform .2s var(--ease)}
.button:hover{background:var(--indigo-hover);border-color:var(--indigo-hover);transform:translateY(-2px)}
.button:active{transform:translateY(0)}
.button span[aria-hidden]{display:inline-block;transition:transform .25s var(--ease)}
.button:hover span[aria-hidden]{transform:translateY(2px)}
.button-small{min-height:40px;padding:8px 16px;font-size:14px}
.button-secondary{background:transparent;color:var(--ink);border-color:var(--ink)}
.button-secondary:hover{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.button-light{background:var(--paper);color:var(--indigo-deep);border-color:var(--paper)}
.button-light:hover{background:#fff;border-color:#fff}
.button-amber{background:var(--amber);color:var(--night);border-color:var(--amber)}
.button-amber:hover{background:#ffc95a;border-color:#ffc95a}

.eyebrow{font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--indigo);margin-bottom:18px}

/* hero */
.hero{padding-top:72px;padding-bottom:64px}
.hero h1{font-size:clamp(52px,9.4vw,132px);line-height:.94;letter-spacing:-.03em;max-width:12.5ch}
.hero h1 em,.section-heading h2 em{font-style:italic;color:var(--indigo)}
.hero-row{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:end;margin-top:44px}
.hero-description{font-size:19px;line-height:1.7;color:var(--ink-2);max-width:540px}
.hero-cta{justify-self:end}
.hero-actions{display:flex;align-items:flex-start;flex-wrap:wrap;gap:10px}
.system-note{font-size:13px;color:var(--ink-2);margin-top:16px}
.versions-wrap{position:relative}
.versions-menu{position:absolute;top:calc(100% + 8px);right:0;min-width:270px;max-height:320px;overflow:auto;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 14px 34px rgba(22,19,43,.14);padding:6px;z-index:20}
.versions-menu p{padding:12px;font-size:14px;color:var(--ink-2)}
.version-link{display:block;padding:10px 12px;border-radius:6px;text-decoration:none;line-height:1.3;color:var(--ink)}
.version-link:hover{background:var(--lilac)}
.version-link strong{display:block;font-size:14px}
.version-link small{font-size:12px;color:var(--ink-2)}

/* screenshots */
.shot{margin:0;border-radius:10px;overflow:hidden;border:1px solid rgba(22,19,43,.18);background:var(--night);box-shadow:0 30px 60px -28px rgba(22,19,43,.45);will-change:transform}
.night .shot{border-color:var(--night-line);box-shadow:0 30px 60px -24px rgba(0,0,0,.7)}
.shot img{width:100%}

/* stage: screenshot overlaps a flat indigo band */
.stage-band{position:relative;padding-bottom:0}
.stage-band::before{content:"";position:absolute;left:0;right:0;bottom:0;height:62%;background:var(--indigo-deep)}
.stage-band .wrap{position:relative}
.shot-hero{transform:translateY(0) scale(var(--s,1));transform-origin:50% 100%;transition:transform .12s linear}
.facts{list-style:none;margin:0;padding:56px 0 64px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;color:#fff}
.facts li{border-top:1px solid rgba(255,255,255,.28);padding-top:20px}
.facts strong{display:block;font-family:var(--serif);font-weight:400;font-size:clamp(34px,4.6vw,58px);line-height:1;color:var(--amber);margin-bottom:8px}
.facts span{font-size:15px;color:#d9d5f5}

/* sections */
.section-heading{max-width:720px;margin-bottom:72px}
.section-heading h2,.comparison-layout h2,.faq-head h2,.download-layout h2{font-size:clamp(38px,5.4vw,72px);line-height:1;letter-spacing:-.025em}
.section-heading>p:last-child{margin-top:22px;font-size:18px;color:var(--ink-2);max-width:560px}
.chapters{padding-top:120px}
.chapter{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;padding:56px 0}
.chapter.flip{grid-template-columns:7fr 5fr}
.chapter.flip .chapter-text{order:2}
.chapter-no{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--indigo);padding-bottom:12px;margin-bottom:22px;border-bottom:2px solid var(--amber)}
.chapter h3{font-size:clamp(34px,4vw,54px);line-height:1.02;margin-bottom:20px}
.chapter-text p{color:var(--ink-2);max-width:440px}
.night{background:var(--night);color:var(--night-text);margin:72px 0;padding:72px 0}
.night .chapter-text p{color:var(--night-mute)}
.night .chapter-no{color:var(--amber)}

.index{margin-top:56px;padding-top:40px;border-top:1px solid var(--ink)}
.index-title{font-size:clamp(30px,3.4vw,44px);margin-bottom:28px}
.index-list{margin:0;display:grid;grid-template-columns:1fr 1fr;column-gap:56px}
.index-list>div{display:grid;grid-template-columns:200px 1fr;gap:20px;padding:22px 0;border-top:1px solid var(--line)}
.index-list dt{font-weight:600;font-size:16px}
.index-list dd{margin:0;color:var(--ink-2);font-size:15.5px}

/* approach */
.comparison-section{background:var(--lilac);margin-top:120px;padding:104px 0}
.comparison-layout{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:start}
.comparison-layout>div>p:last-child{margin-top:24px;color:var(--ink-2);max-width:480px}
.comparison-list{list-style:none;margin:0;padding:0}
.comparison-list li{display:grid;grid-template-columns:52px 1fr;gap:16px;padding:22px 0;border-top:1px solid rgba(22,19,43,.28)}
.comparison-list li:last-child{border-bottom:1px solid rgba(22,19,43,.28)}
.comparison-symbol{font-family:var(--serif);font-size:40px;line-height:1;color:var(--indigo)}
.comparison-list strong{display:block;font-size:18px;margin-bottom:2px}
.comparison-list p{color:var(--ink-2);font-size:15.5px}

/* video */
.video-section{padding-top:112px}
.video-shell{aspect-ratio:16/9;background:var(--night);border-radius:10px;overflow:hidden;display:grid;place-items:center;border:1px solid var(--night-line)}
.video-shell video{width:100%;height:100%;display:block;background:#000}
.video-placeholder{display:grid;justify-items:center;gap:18px;padding:24px;text-align:center;color:var(--night-text)}
.video-placeholder p{color:var(--night-mute);font-size:15px;max-width:380px}
.play-symbol{width:84px;height:84px;border-radius:50%;border:2px solid var(--amber);color:var(--amber);display:grid;place-items:center;font-size:26px;padding-left:5px;animation:pulse 2.8s var(--ease) infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(245,184,58,.45)}70%,100%{box-shadow:0 0 0 22px rgba(245,184,58,0)}}

/* faq */
.faq{padding-top:128px;padding-bottom:128px;display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start}
.faq-list details{border-top:1px solid var(--ink)}
.faq-list details:last-child{border-bottom:1px solid var(--ink)}
.faq-list summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:24px 0;font-family:var(--serif);font-size:clamp(22px,2.4vw,30px);line-height:1.15}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"";flex:none;width:14px;height:14px;background:linear-gradient(var(--indigo),var(--indigo)) center/100% 2px no-repeat,linear-gradient(var(--indigo),var(--indigo)) center/2px 100% no-repeat;transition:transform .3s var(--ease)}
.faq-list details[open] summary::after{transform:rotate(135deg)}
.faq-list summary:hover{color:var(--indigo)}
.faq-list details p{padding:0 40px 26px 0;color:var(--ink-2);max-width:620px;animation:fadeDown .35s var(--ease)}
@keyframes fadeDown{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* download */
.download-band{background:var(--indigo-deep);color:#fff;padding:96px 0}
.download-band .eyebrow{color:var(--amber)}
.download-layout{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;flex-wrap:wrap}
.download-layout p:last-child{margin-top:18px;color:#d9d5f5}
.download-layout h2{max-width:14ch}

/* footer */
.site-footer{background:var(--night);color:var(--night-mute);padding:36px 0;font-size:14px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer-brand{color:var(--night-text);font-size:26px}
.site-footer a{color:var(--night-text)}
.site-footer .footer-top{color:var(--night-mute)}
.site-footer .footer-top:hover{color:var(--amber)}

/* reveal on scroll (only when JS is on) */
.js [data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease);transition-delay:var(--d,0s)}
.js [data-reveal].is-in{opacity:1;transform:none}

/* responsive */
@media (max-width:960px){
  .desktop-nav{display:none}
  .header-actions{margin-left:auto}
  .hero{padding-top:48px}
  .hero-row{grid-template-columns:1fr;gap:28px}
  .hero-cta{justify-self:start}
  .versions-menu{right:auto;left:0}
  .chapter,.chapter.flip{grid-template-columns:1fr;gap:32px;padding:36px 0}
  .chapter.flip .chapter-text{order:0}
  .comparison-layout,.faq{grid-template-columns:1fr;gap:40px}
  .index-list{grid-template-columns:1fr}
  .stage-band::before{height:48%}
  .facts{padding:36px 0 48px}
  .chapters{padding-top:88px}
  .comparison-section{margin-top:72px;padding:72px 0}
  .faq{padding-top:88px;padding-bottom:88px}
}
@media (max-width:560px){
  body{font-size:16px}
  .index-list>div{grid-template-columns:1fr;gap:6px}
  .facts{grid-template-columns:1fr;gap:16px}
  .facts li{display:flex;align-items:baseline;gap:16px}
  .facts strong{margin:0;min-width:128px;font-size:30px}
  .download-band{padding:72px 0}
  .brand{font-size:26px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js [data-reveal]{opacity:1;transform:none}
}