:root{--ink:#0e1116;--muted:#5a5f68;--paper:#fafaf8;--line:rgba(14,17,22,.08);--blue:#3a44e0;--blue-soft:#eef0ff}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;overflow-x:hidden;color:var(--ink);background:var(--paper);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.nav-wrap{position:sticky;top:16px;z-index:10;display:flex;justify-content:center;padding:0 16px}nav{display:flex;align-items:center;gap:8px;padding:6px 6px 6px 12px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.78);box-shadow:0 8px 30px rgba(14,17,22,.06);backdrop-filter:blur(18px)}.brand{display:flex;align-items:center;gap:9px;margin-right:9px;text-decoration:none;font-size:17px;font-weight:700;letter-spacing:-.035em}.brand img{width:28px;height:28px;border-radius:8px}.nav-links{display:flex;gap:2px}.nav-links a{padding:8px 10px;border-radius:999px;color:#3b4048;text-decoration:none;font-size:14px}.nav-links a:hover{background:rgba(14,17,22,.05);color:var(--ink)}.download{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border:1px solid transparent;border-radius:999px;background:var(--ink);color:#fff;font-size:14px;font-weight:600;text-decoration:none;transition:transform .2s,background .2s,color .2s,border-color .2s,box-shadow .2s}.download:hover,.cta:hover{transform:translateY(-2px);border-color:rgba(14,17,22,.16);background:#fff;color:var(--ink);box-shadow:0 12px 28px rgba(14,17,22,.14)}.download:focus-visible,.cta:focus-visible{outline:3px solid rgba(58,68,224,.42);outline-offset:4px}
.hero{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:48px;max-width:1240px;min-height:730px;margin:0 auto;padding:72px 24px 96px}.hero-copy{position:relative;z-index:1;flex:1 1 440px;min-width:0}h1,h2,h3,p{margin:0}h1{max-width:690px;font-size:clamp(3.4rem,6vw,4.5rem);font-weight:650;letter-spacing:-.055em;line-height:1.02}.lede{max-width:490px;margin-top:28px;color:#4a4f57;font-size:19px;line-height:1.55}.hero-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-top:30px}.cta{display:inline-flex;min-height:56px;align-items:center;justify-content:center;padding:0 24px;border-radius:16px;background:var(--ink);color:#fff;font-weight:600;text-decoration:none;transition:transform .2s,background .2s}.note{color:#6a6f78;font-size:13px}
.visual{position:relative;z-index:1;flex:1 1 450px;height:570px;min-width:0}.flow-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.flow{stroke-dasharray:4 8;animation:flow 1.6s linear infinite}@keyframes flow{to{stroke-dashoffset:-24}}.blob{position:absolute;border-radius:50%;filter:blur(72px);opacity:.55;pointer-events:none;animation:drift 13s ease-in-out infinite alternate}.blob.one{width:510px;height:410px;top:35px;right:3%;background:#9ea8ff}.blob.two{width:390px;height:350px;top:300px;right:30%;background:#ffb8a8;animation-delay:-4s}.blob.three{width:320px;height:300px;top:420px;right:-50px;background:#9fe3d2;animation-delay:-8s}@keyframes drift{to{transform:translate(38px,-26px) scale(1.08)}}.phone{position:absolute;left:50%;top:28px;width:260px;height:530px;transform:translateX(-50%) rotate(-4deg);overflow:hidden;border-radius:39px;background:#f2f4f9;box-shadow:0 32px 60px rgba(14,17,22,.28)}.phone img{display:block;width:100%;height:100%;object-fit:cover;object-position:top}
.chip,.chat{position:absolute;z-index:2;border:1px solid rgba(14,17,22,.07);background:rgba(255,255,255,.92);box-shadow:0 16px 35px rgba(14,17,22,.12);backdrop-filter:blur(12px)}.chip{display:flex;align-items:center;gap:10px;padding:10px 14px 10px 10px;border-radius:16px;animation:float 6s ease-in-out infinite}.chip i{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--blue-soft);font-style:normal}.chip b{display:block;font-size:15px}.chip small{color:#6a6f78;font-size:11px}.sleep{left:0;top:110px}.hrv{left:-8px;top:385px;animation-delay:-3s}.steps{right:0;top:88px;animation-delay:-1.5s}.hrv i{background:#ffede8}.steps i{background:#e5f7f1}@keyframes float{50%{transform:translateY(-12px)}}.chat{right:-12px;bottom:27px;width:300px;padding:16px;border-radius:22px}.chat-head{font-size:12px;color:#5a5f68}.status{display:inline-block;width:8px;height:8px;margin-right:7px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px rgba(58,68,224,.12)}.bubble{margin-top:10px;padding:10px 13px;border-radius:16px 16px 16px 4px;background:#f1f2f5;font-size:14px;line-height:1.45}.bubble.question{max-width:85%;margin-left:auto;border-radius:16px 16px 4px 16px;background:#10131a;color:#fff}
.section{max-width:1240px;margin:0 auto;padding:72px 24px 120px}.eyebrow{color:var(--blue);font-size:13px;letter-spacing:.05em}.section-title{max-width:700px;margin-top:16px;font-size:clamp(2.35rem,4vw,3.25rem);font-weight:650;line-height:1.05;letter-spacing:-.05em}.how-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:56px}.how-wide{grid-column:1/-1;display:grid;grid-template-columns:.85fr 1fr 1fr;gap:32px;padding:36px;border:1px solid rgba(58,68,224,.08);border-radius:32px;background:linear-gradient(135deg,#f0f1ff,#f8f2ff)}.step-num{color:#5a5f68;font-size:13px}.step h3{margin-top:14px;font-size:30px;letter-spacing:-.04em;line-height:1.1}.step p{margin-top:14px;color:#4a4f57;line-height:1.6}.share-list{padding:8px 18px;border-radius:22px;background:#fff;box-shadow:0 10px 30px rgba(14,17,22,.05)}.share-list div{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:52px;border-bottom:1px solid #f0f1f4}.share-list div:last-child{border:0}.share-list b{font-size:15px}.share-list small{display:block;color:#6a6f78;font-size:12px}.toggle{width:42px;height:24px;border-radius:999px;background:var(--blue)}.toggle:after{content:"";display:block;width:18px;height:18px;margin:3px 3px 3px auto;border-radius:50%;background:white}.payload{padding:20px;border-radius:22px;background:#10131a;color:#c9ccf8;font-size:13px;line-height:1.75}.payload small{display:block;margin-bottom:8px;color:#8a8f98}.payload em{font-style:normal;color:#9ee6cf}.step-card{display:flex;flex-direction:column;gap:18px;padding:36px;border-radius:32px}.green{background:linear-gradient(160deg,#eaf8f3,#f4fbf8)}.peach{background:linear-gradient(160deg,#fff1ec,#fff8f5)}.connection{padding:18px;border-radius:18px;background:white}.connection+.connection{margin-top:12px}.connection div{display:flex;justify-content:space-between}.connection p{margin-top:6px;font-size:14px}.tag{padding:4px 9px;border-radius:999px;background:#e5f7f1;color:#146b52;font-size:12px;font-weight:700}.tag.cloud{background:var(--blue-soft);color:#2e37c4}.sample-chat{margin-top:auto}.sample-chat div{margin-top:8px;padding:10px 13px;border-radius:16px 16px 16px 4px;background:#fff;font-size:14px;line-height:1.45}.sample-chat .question{margin-left:auto;border-radius:16px 16px 4px 16px;background:#10131a;color:#fff}
.privacy{padding:0 16px 96px}.privacy-inner{position:relative;max-width:1240px;margin:auto;overflow:hidden;padding:72px 40px;border-radius:40px;background:#10131a;color:#fff}.privacy-inner:after{content:"";position:absolute;right:-85px;top:-170px;width:460px;height:340px;border-radius:50%;background:#3a44e0;filter:blur(72px);opacity:.32}.privacy-inner>*{position:relative;z-index:1}.privacy .eyebrow{color:#9ea8ff}.privacy-copy{max-width:650px}.privacy-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:48px}.privacy-grid div{padding-top:20px;border-top:1px solid rgba(255,255,255,.14)}.privacy-grid h3{font-size:18px}.privacy-grid p{margin-top:10px;color:#b4b8c2;line-height:1.6}.final{max-width:780px;margin:0 auto;padding:0 24px 100px;text-align:center}.final h2{font-size:clamp(2.35rem,4vw,3.25rem);letter-spacing:-.05em;line-height:1.05}.final p{margin:16px auto 0;color:#4a4f57;font-size:17px}.final .cta{margin-top:28px}.footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;max-width:1240px;margin:auto;padding:32px 24px 48px;border-top:1px solid var(--line);color:#5a5f68;font-size:13px}.footer div{display:flex;align-items:center;gap:20px}.footer a{text-underline-offset:3px}.github-link{display:inline-flex;align-items:center;justify-content:center;color:#5a5f68}.github-link:hover{color:var(--ink)}
.works{max-width:1240px;margin:0 auto;padding:8px 24px 56px;text-align:center}.works h2{max-width:640px;margin:14px auto 0;font-size:clamp(1.75rem,3vw,2.2rem);font-weight:650;letter-spacing:-.04em;line-height:1.15}.agent-group{margin-top:34px}.agent-group h3{color:var(--muted);font-size:13px;font-weight:500}.agent-list{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;max-width:900px;margin:14px auto 0;padding:0;list-style:none}.agent-list li{padding:10px 18px;border:1px solid rgba(14,17,22,.09);border-radius:999px;background:#fff;font-size:15px;font-weight:500;transition:transform .2s,box-shadow .2s}.agent-list li:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(14,17,22,.08)}.agent-list li.own{border-style:dashed;border-color:rgba(58,68,224,.45);background:var(--blue-soft);color:#2e37c4}.agent-group.small{margin-top:28px}.agent-group.small h3{font-size:12px}.agent-group.small .agent-list{gap:8px;max-width:760px;margin-top:10px}.agent-group.small .agent-list li{padding:6px 12px;font-size:13px;color:var(--muted);background:transparent;border-color:rgba(14,17,22,.08)}.works-note{margin-top:28px;color:var(--muted);font-size:14px}.legal{display:flex;flex-direction:column;gap:6px}.legal small{color:#6a6f78;font-size:12px}
@media (prefers-reduced-motion:no-preference){html.motion-ready .agent-list li{opacity:0;transform:translateY(14px);transition:opacity .5s cubic-bezier(.2,.8,.2,1),transform .5s cubic-bezier(.2,.8,.2,1);transition-delay:calc(var(--i) * 45ms)}html.motion-ready .works.is-visible .agent-list li{opacity:1;transform:none}html.motion-ready .works.is-visible .agent-list li:hover{transform:translateY(-2px);transition-delay:0s}}
@media (prefers-reduced-motion:no-preference){html.motion-ready .how-grid>article{opacity:0;transform:translateY(34px);transition:opacity .62s cubic-bezier(.2,.8,.2,1),transform .62s cubic-bezier(.2,.8,.2,1)}html.motion-ready .how-grid>article.is-visible{opacity:1;transform:translateY(0)}html.motion-ready .how-grid>article:nth-child(2){transition-delay:.16s}html.motion-ready .how-grid>article:nth-child(3){transition-delay:.32s}}
@media(max-width:760px){.nav-links{display:none}.brand{margin-right:0}.download{padding:0 14px}.hero{padding-top:48px;gap:12px}.visual{height:500px;flex-basis:100%}.phone{width:230px;height:480px;top:10px}.chat{right:0;bottom:0;width:250px}.steps{display:none}.how-grid,.privacy-grid{grid-template-columns:1fr}.how-wide{grid-template-columns:1fr;padding:26px}.step-card{padding:28px}.privacy-inner{padding:52px 26px;border-radius:28px}.privacy-grid{gap:24px}.section{padding-bottom:80px}.hrv{left:0}.sleep{top:72px}h1{font-size:clamp(3.15rem,14vw,4.4rem)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}html{scroll-behavior:auto}}

/* Language switch */
.lang-switch{display:flex;gap:2px;margin-left:4px;padding:3px;border-radius:999px;background:rgba(14,17,22,.04)}.lang-switch a{padding:6px 9px;border-radius:999px;color:#5a5f68;font-size:13px;text-decoration:none;white-space:nowrap}.lang-switch a:hover{color:var(--ink)}.lang-switch a[aria-current]{background:#fff;color:var(--ink);font-weight:600;box-shadow:0 1px 3px rgba(14,17,22,.08)}
/* Intro under "How it works" */
.section-intro{max-width:640px;margin-top:20px;color:#4a4f57;font-size:18px;line-height:1.65}
.step-card>p{color:#4a4f57;line-height:1.6}
.privacy-grid{grid-template-columns:repeat(2,1fr);column-gap:48px;row-gap:28px}
/* Chinese & Japanese typography */
:lang(zh) body,:lang(ja) body{font-family:Inter,ui-sans-serif,system-ui,-apple-system,"PingFang SC","Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans CJK SC","Noto Sans JP","Microsoft YaHei",Meiryo,sans-serif}
:lang(zh) h1,:lang(ja) h1{font-size:clamp(2.5rem,5vw,3.6rem);letter-spacing:-.02em;line-height:1.18}
:lang(zh) .section-title,:lang(ja) .section-title,:lang(zh) .final h2,:lang(ja) .final h2{font-size:clamp(1.9rem,3.4vw,2.6rem);letter-spacing:-.02em;line-height:1.25}
:lang(zh) .works h2,:lang(ja) .works h2,:lang(zh) .step h3,:lang(ja) .step h3,:lang(zh) .step-card h3,:lang(ja) .step-card h3{letter-spacing:-.01em;line-height:1.3}
:lang(zh) .step-card h3,:lang(ja) .step-card h3,:lang(zh) .step h3,:lang(ja) .step h3{font-size:26px}
@media(max-width:760px){.lang-switch a{padding:6px 7px;font-size:12px}.privacy-grid{grid-template-columns:1fr}:lang(zh) h1,:lang(ja) h1{font-size:clamp(2.2rem,9vw,3rem)}}
@media(max-width:380px){.brand{font-size:0;gap:0}.download{padding:0 12px}}

/* ---- Warmer theme ---- */
:root{--ink:#2a2530;--muted:#6b6470;--paper:#fbf7f2;--line:rgba(60,40,50,.09);--blue:#5b4ce0;--blue-soft:#efecff;--warm:#f5efe8}
body{background:var(--paper);color:var(--ink)}
nav{background:rgba(255,252,248,.82)}
.download,.cta{background:var(--blue);color:#fff}
.cta{border-radius:999px;box-shadow:0 10px 26px rgba(91,76,224,.25)}
.eyebrow{display:inline-block;padding:6px 12px;border-radius:999px;background:var(--blue-soft);color:var(--blue);font-family:inherit;font-size:13px;font-weight:600;letter-spacing:.02em}
.lede,.step p,.section-intro,.final p,.step-card>p{color:#5b5560}
.blob.one{background:#c9c0ff}.blob.two{background:#ffcdb8}.blob.three{background:#bfe8d8}
.phone{box-shadow:0 32px 60px rgba(60,40,70,.22)}
.chip,.chat{background:rgba(255,253,250,.94);border-color:rgba(60,40,50,.06)}
.chip i{background:#efecff}.hrv i{background:#ffe9e2}.steps i{background:#e3f5ec}
.bubble{background:var(--warm)}
.bubble.question,.sample-chat .question{background:var(--blue);color:#fff}
.how-wide{border-color:rgba(91,76,224,.08);background:linear-gradient(135deg,#f3f0ff,#fdf3ee)}
.toggle{background:var(--blue)}
.share-list div{border-bottom-color:#f3eee8}
.payload{background:#fff;color:var(--ink);font-family:inherit;font-size:15px;line-height:1.6;box-shadow:0 10px 30px rgba(60,40,50,.05)}
.payload small{color:var(--muted);font-size:12px;margin-bottom:12px}
.payload p{margin:0;padding:10px 13px;border-radius:16px 16px 16px 4px;background:var(--warm)}
.payload p+p{margin-top:8px}
.green{background:linear-gradient(160deg,#e8f6ef,#f7fbf5)}
.peach{background:linear-gradient(160deg,#fff0e8,#fff9f4)}
.tag{background:#e3f5ec;color:#1f6b50}
.tag.cloud{background:var(--blue-soft);color:var(--blue)}
.privacy-inner{background:linear-gradient(135deg,#efeaff 0%,#fdf1ea 100%);color:var(--ink)}
.privacy-inner:after{background:#ffd2c0;opacity:.5}
.privacy .eyebrow{background:rgba(255,255,255,.7);color:var(--blue)}
.privacy-grid div{border-top-color:rgba(60,40,50,.12)}
.privacy-grid p{color:#5b5560}
.agent-list li{background:#fffdfa}
.agent-list li.own{border-color:rgba(91,76,224,.45);color:var(--blue)}
.footer{color:var(--muted)}

/* Personality section: same data, different AIs */
.persona{max-width:1240px;margin:0 auto;padding:40px 24px 96px;text-align:center}
.persona .section-title,.persona .section-intro{margin-left:auto;margin-right:auto}
.persona-data{display:inline-flex;align-items:center;gap:10px;margin-top:36px;padding:10px 18px 10px 10px;border:1px solid var(--line);border-radius:999px;background:#fffdfa;font-weight:600;font-size:15px}
.persona-data i{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--blue-soft);font-style:normal}
.persona-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:28px;text-align:left}
.persona-card{margin:0;padding:24px;border-radius:28px;background:#fff;box-shadow:0 14px 34px rgba(60,40,50,.07)}
.persona-card:nth-child(1){background:linear-gradient(160deg,#fff4ee,#fffaf6)}
.persona-card:nth-child(2){background:linear-gradient(160deg,#f1eeff,#faf8ff)}
.persona-card:nth-child(3){background:linear-gradient(160deg,#eaf6f0,#f7fbf8)}
.persona-card figcaption{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;font-weight:600}
.face{position:relative;width:30px;height:30px;border-radius:10px;background:var(--blue)}
.face:before,.face:after{content:"";position:absolute;top:13px;width:6px;height:2px;border-radius:2px;background:#fff}
.face:before{left:8px}.face:after{right:8px}
.persona-card:nth-child(1) .face{background:#f29a7c}.persona-card:nth-child(3) .face{background:#3f9b78}
.persona-card p{margin-top:16px;padding:12px 15px;border-radius:18px 18px 18px 4px;background:rgba(255,255,255,.85);font-size:15px;line-height:1.55}
@media(max-width:760px){.persona-grid{grid-template-columns:1fr}.persona{padding-bottom:72px}}

/* Clip decorative blobs so phones cannot scroll sideways */
html,body{overflow-x:clip}
/* CJK headline sizing so lines break cleanly */
:lang(zh) h1,:lang(ja) h1{font-size:clamp(2.4rem,4.2vw,3.15rem)}
@media(max-width:760px){:lang(zh) h1,:lang(ja) h1{font-size:clamp(1.8rem,7.4vw,2.6rem)}}
h1,.section-title,.works h2,.final h2{text-wrap:balance}
@media(max-width:760px){:lang(zh) .section-title,:lang(ja) .section-title,:lang(zh) .final h2,:lang(ja) .final h2,:lang(zh) .works h2,:lang(ja) .works h2{font-size:1.6rem}}
.download{white-space:nowrap}
@media(max-width:760px){:lang(en) h1{font-size:clamp(2.4rem,10.5vw,3.2rem);letter-spacing:-.045em}}