:root{color-scheme:light;--ink:#17181c;--muted:#525864;--line:#e5e7ec;--blue:#1755b5;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",system-ui,sans-serif;color:var(--ink);background:#fff}
*{box-sizing:border-box}body{margin:0}a{color:var(--blue);text-underline-offset:.2em}a:focus-visible,summary:focus-visible{outline:3px solid #326dcc;outline-offset:5px}
header{position:sticky;top:0;z-index:1;background:#ffffffc9;border-bottom:1px solid #e5e7eca0;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
nav,main,footer{width:min(1040px,calc(100% - 48px));margin:auto}
nav,footer{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:17px 0}nav div{display:flex;gap:clamp(14px,4vw,34px)}nav a{color:var(--ink);text-decoration:none;font-size:.94rem}
.wordmark{font-size:1.85rem;letter-spacing:-.09em;line-height:1}.wordmark b:nth-child(1){color:#4285f4}.wordmark b:nth-child(2){color:#ea4335}.wordmark b:nth-child(3){color:#fbbc05}.wordmark b:nth-child(4){color:#34a853}
.eyebrow{font-size:.83rem;font-weight:650;letter-spacing:.05em;color:#475568}
h1,h2,p{margin:0 0 16px}h1{font-size:clamp(3rem,8vw,6.1rem);line-height:1.05;letter-spacing:-.075em}h2{font-size:clamp(1.55rem,4vw,2.5rem);line-height:1.18;letter-spacing:-.04em}
p,li{color:var(--muted);line-height:1.75}.intro{max-width:31ch;font-size:1.15rem;margin:24px 0}
.button{display:inline-block;padding:12px 21px;border-radius:999px;background:#0071e3;color:#fff;text-decoration:none;font-weight:650;transition:background .18s}.button:hover{background:#0064cc}
.release,.policy{padding:70px 0;max-width:680px}.release,.features{scroll-margin-top:86px}.policy h1{font-size:clamp(2.4rem,6vw,4rem)}.policy h2{font-size:1.45rem;margin-top:32px}
details{border-top:1px solid var(--line);padding:16px 0}summary{cursor:pointer;font-weight:650}details p,details ol{margin:12px 0 0}footer{border-top:1px solid var(--line);color:var(--muted);font-size:.87rem}#download .button{margin-bottom:12px}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

/* The full-width stage reuses the welcome screen's three-paper composition. */
.wordmark{font-size:clamp(2rem,4vw,3rem);font-weight:800}
body.home-page main{width:100%}
.hero{position:relative;isolation:isolate;display:block;text-align:center;min-height:0;padding:clamp(50px,7vw,90px) 20px 0;overflow:hidden;background:#e7effc}
.hero-copy{position:relative;z-index:1}
.hero h1{font-size:clamp(2.4rem,6.8vw,5.55rem);line-height:1.13;letter-spacing:-.065em}
.hero .intro{max-width:36em;margin:16px auto 22px;font-size:clamp(.96rem,2vw,1.17rem)}
.hero-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.button-secondary{color:#253348;background:#ffffffad;border:1px solid #68789147}
.button-secondary:hover{background:#fff}
.hero-art{height:clamp(290px,42vw,525px);position:relative;pointer-events:none}
.paper-stack{position:absolute;top:50%;left:50%;width:clamp(160px,25vw,310px);aspect-ratio:.8;transform:translate(-50%,-48%)}
.paper{position:absolute;inset:0;border:1px solid #fff;border-radius:clamp(15px,2vw,25px);box-shadow:0 22px 55px #272c381e;transform-origin:50% 78%}
.paper-back{background:#a9c5ef;border-color:#d8e6fc;transform:translate(calc(-24% - 29% * var(--paper-progress, 0)), 9%) rotate(calc(-15deg - 16deg * var(--paper-progress, 0)))}
.paper-middle{background:#c7dbf8;border-color:#edf4ff;transform:translate(calc(25% + 30% * var(--paper-progress, 0)), 6%) rotate(calc(14deg + 15deg * var(--paper-progress, 0)))}
.paper-front{display:flex;flex-direction:column;align-items:flex-start;text-align:left;padding:12%;background:#f8fbff;transform:translateY(calc(-3% - 13% * var(--paper-progress, 0))) rotate(calc(-3deg + 6deg * var(--paper-progress, 0)))}
.hero .paper-front img{display:block;width:clamp(25px,4vw,45px);height:auto;filter:none;animation:none;margin-bottom:12%}
.paper-front strong{font-size:clamp(1.1rem,3vw,2.3rem);letter-spacing:-.05em}
.paper-front span{font-size:clamp(.6rem,1.2vw,.88rem);color:#4a5e7e;margin-top:7%}
.paper-lines,.sample-lines{display:grid;gap:8px;width:100%;margin-top:12%}
.paper-lines i,.sample-lines i{display:block;height:3px;border-radius:8px;background:var(--sample-rule,#c4d7f3)}
.paper-lines i:nth-child(2),.sample-lines i:nth-child(2){width:86%}
.paper-lines i:nth-child(4),.sample-lines i:nth-child(3){width:62%}
.features{display:block;width:min(1240px,calc(100% - 48px));margin:0 auto;padding:clamp(55px,8vw,106px) 0 0}
.features>h2{margin-bottom:24px;font-size:clamp(1.8rem,4vw,3.25rem)}
.features>h2 span{color:#626875}
.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.features .feature-card{position:relative;overflow:hidden;min-height:440px;padding:clamp(19px,2.5vw,34px) clamp(19px,2.5vw,34px) 240px;border:0;border-radius:28px}
.feature-card h3{font-size:clamp(1.45rem,2.55vw,2.15rem);letter-spacing:-.06em;margin:0 0 12px}
/* Each card pairs a solid stage with lighter surfaces in the same hue. */
.features .feature-write{background:#e8dff6;--sample-paper:#fcfaff;--sample-chrome:#efe7fa;--sample-rule:#d6c5eb;--sample-ink:#4d376b}
.features .feature-read{background:#d8eee7;--sample-paper:#f8fdfb;--sample-chrome:#e5f3ed;--sample-rule:#bbdfd2;--sample-ink:#23584a}
.features .feature-mark{background:#f8e6bd;--sample-paper:#fffcf3;--sample-chrome:#f9efd8;--sample-rule:#e9d3a1;--sample-ink:#674b1d}
.feature-card .eyebrow{color:var(--sample-ink)}
.feature-visual{position:absolute;top:auto;bottom:-45px;left:12%;width:91%;height:255px;background:var(--sample-paper);border:1px solid #fff;border-radius:16px;overflow:hidden;box-shadow:0 18px 48px #222e4830;pointer-events:none}
.sample-toolbar{height:36px;display:flex;align-items:center;gap:14px;padding:0 14px;font-size:.72rem;background:var(--sample-chrome);color:var(--sample-ink);border-bottom:1px solid var(--sample-rule)}
.reader-visual .sample-toolbar{justify-content:space-between}
.sample-sheet{background:var(--sample-paper);padding:20px;color:var(--sample-ink);font-size:.88rem}
.sample-sheet p{margin:7px 0;font-size:.76rem}
.sample-sheet mark{background:#ffdb79;border-radius:3px;padding:2px;color:inherit}
.sample-reader{display:grid;grid-template-columns:46px 1fr}
.sample-thumbs{display:grid;gap:8px;align-content:start;padding:10px;background:var(--sample-chrome)}
.sample-thumbs i{aspect-ratio:.76;background:var(--sample-paper);border:1px solid var(--sample-rule);border-radius:3px}
.sample-search{display:inline-block;margin-top:16px;padding:5px 10px;border-radius:999px;background:var(--sample-chrome);font-size:.7rem}
.mark-visual{width:90%;transform:rotate(-7deg);bottom:-58px}
.release{width:min(680px,calc(100% - 48px));margin:auto}
@media(max-width:840px){.feature-grid{grid-template-columns:1fr}.features .feature-card{min-height:0;padding-bottom:230px}.feature-visual{left:14%;width:min(76%,440px);bottom:-60px}.hero{padding-top:48px}}


/* Scroll position controls the composition. The unenhanced layout is fully visible. */
.paper-lines i{transform-origin:left;transform:scaleX(calc(.78 + .22 * var(--paper-progress, 0)))}
.scroll-motion .feature-card > :is(.eyebrow,h3,p){opacity:var(--copy,1);transform:translateY(var(--copy-offset,0px))}
.scroll-motion .feature-visual{opacity:var(--art,1);translate:0 var(--art-offset,0px)}
@media(min-width:841px){
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .features .feature-write{grid-column:1/-1;min-height:375px;padding:56px 54% 56px 48px}
  .feature-write .feature-visual{left:50%;width:46%;height:310px;bottom:-26px}
  .feature-read .feature-visual,.feature-mark .feature-visual{left:14%;width:80%}
}
@media(prefers-reduced-motion:reduce){
  .scroll-motion .feature-card > :is(.eyebrow,h3,p),.scroll-motion .feature-visual{opacity:1;transform:none;translate:none}
  .hero{--paper-progress:0!important}
}

.app-screens{width:min(1240px,calc(100% - 48px));margin:clamp(52px,8vw,92px) auto 0}
.app-screen-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.app-screen-grid figure{margin:0}
.app-screen-grid img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:20px;background:#f5f5f7}
.app-screen-grid figcaption{margin-top:10px;color:var(--muted);font-size:.85rem}
@media(max-width:720px){.app-screen-grid{grid-template-columns:1fr}}