.landing{background:var(--bg);min-height:100dvh;color:var(--fg);position:relative;overflow-x:hidden}.landing:before{content:"";background:radial-gradient(ellipse 80% 55% at 50% -8%, color-mix(in oklab, var(--accent) 14%, transparent), transparent 62%);pointer-events:none;z-index:0;height:110vh;position:absolute;inset:0 0 auto}.landing>*{z-index:1;position:relative}.nav{z-index:20;width:min(64rem,100% - 2rem);margin:var(--space-4) auto 0;justify-content:space-between;align-items:center;gap:var(--space-5);padding:var(--space-3) var(--space-3) var(--space-3) var(--space-5);border:1px solid var(--border);border-radius:var(--radius);background:color-mix(in oklab, var(--panel) 86%, transparent);-webkit-backdrop-filter:blur(14px)saturate(140%);display:flex;position:sticky;top:.75rem}@media (prefers-reduced-transparency:reduce){.nav{background:var(--panel);-webkit-backdrop-filter:none}}.nav-brand{color:var(--fg);font-size:var(--text-md);text-decoration:none}.nav-actions{align-items:center;gap:var(--space-2);display:flex}.nav-link{color:var(--fg-muted);font-size:var(--text-sm);padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);text-decoration:none}.nav-link:hover{color:var(--fg);background:var(--bg)}.nav-lang{color:var(--fg);border:1px solid var(--border-strong);letter-spacing:.01em}.nav-lang:hover{border-color:var(--fg-muted);background:var(--field)}.hero{text-align:center;width:min(58rem,100% - 2.5rem);margin:0 auto;padding:clamp(3.5rem,11vh,7rem) 0 clamp(2.5rem,6vh,3.5rem)}.hero-title{letter-spacing:-.035em;text-wrap:balance;max-width:20ch;margin:0 auto;font-size:clamp(2.35rem,5.6vw,4.4rem);font-weight:660;line-height:1.05}.hero-sub{max-width:46ch;color:var(--fg-muted);font-size:var(--text-md);text-wrap:pretty;margin:clamp(1.1rem,2.5vh,1.5rem) auto 0;line-height:1.55}.hero-actions{justify-content:center;gap:var(--space-3);flex-wrap:wrap;margin-top:clamp(1.5rem,3.5vh,2.2rem);display:flex}.stage{width:min(64rem,100% - 2.5rem);margin:0 auto;padding-bottom:clamp(4rem,10vh,7rem);scroll-margin-top:5rem}.stage-head{text-align:center;max-width:42ch;margin:0 auto clamp(1.5rem,3.5vh,2rem)}.stage-head h2{margin:0 0 var(--space-3);letter-spacing:-.025em;text-wrap:balance;font-size:clamp(1.45rem,3vw,2rem);font-weight:620;line-height:1.18}.stage-head p{color:var(--fg-muted);text-wrap:pretty;margin:0;line-height:1.55}.switcher{justify-content:center;align-items:center;gap:var(--space-2);margin-bottom:var(--space-5);flex-wrap:wrap;display:flex}.chips{justify-content:center;gap:var(--space-1);flex-wrap:wrap;display:flex}.chip{gap:var(--space-0);text-align:left;padding:var(--space-2) var(--space-4);border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--panel);color:var(--fg-muted);font:inherit;cursor:pointer;transition:border-color .14s,background .14s,color .14s;display:grid}.chip:hover{border-color:var(--border-strong);color:var(--fg)}.chip[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--fg)}.chip-name{font-size:var(--text-sm);font-weight:550}.chip-note{font-size:var(--text-xs);color:var(--fg-muted);line-height:1.3}.pages{font-size:var(--text-xs);font-variant-numeric:tabular-nums;color:var(--fg-muted);border:1px solid var(--border-strong);padding:var(--space-1) var(--space-3);white-space:nowrap;border-radius:999px}.pages[data-fit=over]{color:var(--warn);border-color:var(--warn)}.paper{border-radius:var(--radius);--sheet-w:860px;--sheet-scale:1;justify-content:center;height:clamp(22rem,58vh,36rem);display:flex;position:relative;overflow:hidden;mask-image:linear-gradient(#000 72%,#0000 99%)}.paper iframe{width:var(--sheet-w);height:calc(130% / var(--sheet-scale));transform:scale(var(--sheet-scale));transform-origin:top;border:0;flex:none;display:block}@media (width<=56rem){.paper{--sheet-scale:.88}}@media (width<=48rem){.paper{--sheet-scale:.8}}@media (width<=40rem){.paper{--sheet-scale:.66}}@media (width<=32rem){.paper{--sheet-scale:.52}}@media (width<=26rem){.paper{--sheet-scale:.41}}.paper-note{margin:var(--space-4) 0 0;text-align:center;font-size:var(--text-sm);color:var(--fg-muted)}.proofs{border-top:1px solid var(--border);gap:0;width:min(64rem,100% - 2.5rem);margin:0 auto;padding-bottom:clamp(4rem,10vh,7rem);display:grid}.proofs article{border-bottom:1px solid var(--border);gap:var(--space-2);align-items:start;padding:clamp(1.5rem,3.5vh,2.25rem) 0;display:grid}.proofs h3{font-size:var(--text-md);letter-spacing:-.015em;margin:0;font-weight:600}.proofs p{color:var(--fg-muted);max-width:58ch;margin:0;line-height:1.6}@media (width>=48rem){.proofs article{gap:var(--space-7);grid-template-columns:20rem 1fr}}.close{text-align:center;width:min(48rem,100% - 2.5rem);margin:0 auto;padding-bottom:clamp(4rem,10vh,6rem)}.close h2{margin:0 0 var(--space-2);letter-spacing:-.03em;font-size:clamp(1.75rem,4.5vw,2.75rem);font-weight:640;line-height:1.1}.close p{color:var(--fg-muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:var(--text-sm);margin:0 0 clamp(1.25rem,3vh,1.75rem)}.foot{width:min(64rem,100% - 2.5rem);padding:var(--space-5) 0 var(--space-7);border-top:1px solid var(--border);color:var(--fg-muted);font-size:var(--text-sm);justify-content:space-between;margin:0 auto;display:flex}.foot a{color:var(--fg-muted);text-decoration:none}.foot a:hover{color:var(--fg)}.foot-links{gap:var(--space-5);display:flex}@media (width<=26rem){.hide-xs{display:none}}.will-reveal{opacity:0;transform:translateY(1.25rem)}.will-reveal.is-in{opacity:1;transition:opacity .56s cubic-bezier(.16,1,.3,1),transform .56s cubic-bezier(.16,1,.3,1);transform:none}.paper.will-reveal{transform:translateY(1.75rem)scale(.97)}.paper.will-reveal.is-in{transform:none}@media (prefers-reduced-motion:reduce){.will-reveal,.will-reveal.is-in{opacity:1;transition:none;transform:none}}