/* Brand tokens: preserve native OneLetter colors. Buttons 14px; panels 28px; phone images retain their aspect ratio. */
:root{color-scheme:light dark;--bg:#f7f6f0;--ink:#223a2e;--muted:#405044;--green:#275a44;--on-green:#f9fbf7;--card:#fdfefa;--tint:#e8ede4;--line:#dce3d8;--shadow:rgba(39,90,68,.13);--header:rgba(247,246,240,.94)}
:root[data-theme=light]{color-scheme:light}
:root[data-theme=dark]{color-scheme:dark;--bg:#151e19;--ink:#edf2e9;--muted:#bfcec1;--green:#a0d3b2;--on-green:#172e20;--card:#202c24;--tint:#25382c;--line:#3a4c3f;--shadow:rgba(6,23,13,.38);--header:rgba(21,30,25,.94)}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#151e19;--ink:#edf2e9;--muted:#bfcec1;--green:#a0d3b2;--on-green:#172e20;--card:#202c24;--tint:#25382c;--line:#3a4c3f;--shadow:rgba(6,23,13,.38);--header:rgba(21,30,25,.94)}}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a{color:var(--green);text-underline-offset:5px}button:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--green);outline-offset:5px}button:active,.button:active{transform:translateY(1px)}img{display:block;max-width:100%;height:auto}figure{margin:0}p{margin:0;color:var(--muted)}h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.035em;line-height:1.2}h1{font-size:clamp(40px,4.5vw,64px);line-height:1.22}h1 span{display:block}h2{font-size:clamp(30px,3.2vw,42px);line-height:1.3}h3{font-size:22px;line-height:1.4}.shell{width:min(1160px,calc(100% - 64px));margin-inline:auto}.section{padding-block:88px}.section-heading{margin-bottom:42px}.section-heading p,.section-copy>p{max-width:600px;margin-top:18px}.section-copy>p{max-width:370px}.site-header{position:sticky;top:0;background:var(--header);z-index:10;border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.nav{height:76px;display:flex;align-items:center;gap:34px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;white-space:nowrap;font-size:28px;font-weight:700;letter-spacing:-1px;line-height:1}.brand img{border-radius:10px}.nav-links{display:flex;gap:28px;margin-left:auto;font-size:14px;font-weight:500}.nav-links a{text-decoration:none;min-height:44px;display:flex;align-items:center}.nav-links a:hover{text-decoration:underline}.nav-tools{display:flex;gap:6px}.nav-tools button{min-width:42px;min-height:44px;padding:6px 9px;border:0;background:transparent;border-radius:10px;color:var(--green);font-size:13px;font-weight:600}.nav-tools button:hover{background:var(--tint)}.skip-link{position:fixed;top:8px;left:16px;background:var(--card);padding:12px 20px;z-index:20;transform:translateY(-150%);border-radius:10px}.skip-link:focus{transform:none}.hero{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:36px;padding-block:58px 62px;min-height:650px}.hero-copy{padding-bottom:18px}.eyebrow{font-size:14px;font-weight:500;color:var(--green);margin-bottom:22px;letter-spacing:.04em}.hero-description{margin-top:26px;max-width:410px;line-height:1.9}.hero-actions{display:flex;align-items:center;gap:26px;margin-top:34px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:54px;padding:13px 24px;border-radius:14px;text-decoration:none;font-weight:600;font-size:15px;white-space:nowrap;border:1px solid transparent;transition:transform .18s,background .18s}.primary{background:var(--green);color:var(--on-green)}.primary:hover{filter:brightness(.95)}.secondary{color:var(--green);background:var(--card);border-color:var(--line)}.secondary:hover{background:var(--tint)}.text-link{font-size:14px;font-weight:500;text-decoration:none;border-bottom:1px solid currentColor;padding-bottom:4px}.hero-visual{position:relative;height:525px;isolation:isolate;min-width:0}.hero-visual:before{content:"";position:absolute;inset:36px -8px 8px 0;background:var(--tint);border-radius:48% 48% 36% 36%;z-index:-1}.phone{border:5px solid var(--ink);border-radius:38px;overflow:hidden;background:#f7f6f0;box-shadow:0 22px 50px var(--shadow)}.phone img{width:100%;aspect-ratio:1320/2868}.phone-home{position:absolute;width:242px;left:5px;top:0;transform:rotate(-5deg);z-index:1}.phone-compose{position:absolute;width:206px;right:0;top:71px;transform:rotate(7deg)}.release-note{padding:25px 0;display:flex;justify-content:space-between;gap:32px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px}.release-note span{color:var(--muted);white-space:nowrap}.personalize{display:grid;grid-template-columns:1fr 1.15fr;gap:80px;align-items:center}.demo-instruction{font-size:14px;padding-top:9px}.name-picker{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.name-picker button{min-height:44px;padding:8px 18px;font-size:14px;background:transparent;color:var(--green);border:1px solid var(--line);border-radius:999px;transition:background .15s}.name-picker button[aria-pressed=true]{background:var(--green);color:var(--on-green);border-color:var(--green)}.name-picker button:hover:not([aria-pressed=true]){background:var(--tint)}.letter-preview{background:var(--card);border:1px solid var(--line);border-radius:28px;padding:34px 38px;box-shadow:0 16px 40px var(--shadow)}.letter-top{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted);padding-bottom:28px}.letter-top img{border-radius:12px}.sample-note{font-size:23px;line-height:1.95;letter-spacing:-.02em;color:var(--ink);white-space:pre-line;min-height:135px}.letter-caption{font-size:12px;margin-top:34px;border-top:1px solid var(--line);padding-top:16px}.screens-section{background:var(--tint);padding-bottom:52px}.screens-section .section-heading{margin-bottom:20px}.gallery-controls{display:flex;justify-content:flex-end;gap:10px;margin-bottom:30px}.small-button{border:1px solid var(--line);border-radius:12px;padding:8px 18px;min-height:44px;font-size:13px;color:var(--green);background:var(--card)}.small-button:hover{background:var(--bg)}.small-button:disabled{opacity:.45;cursor:default}.screen-gallery{display:grid;grid-auto-flow:column;grid-auto-columns:244px;gap:38px;overflow-x:auto;overscroll-behavior-inline:contain;padding:4px max(32px,calc((100% - 1160px)/2)) 36px;scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:var(--green) var(--tint)}.screen-item{scroll-snap-align:center}.screen-item .phone{border-radius:36px;box-shadow:0 12px 28px var(--shadow)}figcaption{margin-top:26px}figcaption h3{font-size:18px}figcaption p{font-size:13px;line-height:1.8;margin-top:9px}.gallery-caption{font-size:12px;margin-top:20px}.flow{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:32px;counter-reset:flow}.flow li{counter-increment:flow;position:relative;padding-top:42px}.flow li:before{content:counter(flow);position:absolute;top:0;font-variant-numeric:tabular-nums;font-size:16px;color:var(--green);font-weight:600}.flow h3{font-size:18px}.flow p{font-size:14px;margin-top:14px;line-height:1.85}.feature-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:70px;align-items:start}.feature-lead{background:var(--tint);padding:40px;border-radius:28px;min-height:360px;display:flex;flex-direction:column}.feature-lead h3{font-size:32px;line-height:1.35}.feature-lead>p{margin-top:22px;max-width:360px}.feature-lead .feature-note{margin-top:auto;padding-top:36px;font-size:13px;color:var(--green)}.feature-details{display:grid;gap:30px;padding-top:4px}.feature-details h3{font-size:20px}.feature-details p{margin-top:10px;font-size:14px;line-height:1.85}.privacy-section{max-width:800px;text-align:center;padding-top:48px;padding-bottom:92px}.privacy-section>img{margin:0 auto 24px;border-radius:18px}.privacy-section p{max-width:570px;margin:20px auto 25px;line-height:1.9}.support-section{border-top:1px solid var(--line)}.faq{max-width:870px}details{border-bottom:1px solid var(--line);padding-block:22px}summary{cursor:pointer;list-style:none;font-size:17px;font-weight:500;display:flex;align-items:center;gap:24px;justify-content:space-between}summary::-webkit-details-marker{display:none}summary:after{content:"+";font-size:22px;color:var(--green);font-weight:400}details[open] summary:after{content:"−"}details p{max-width:720px;font-size:15px;line-height:1.9;margin-top:16px}pre{overflow:auto;max-width:100%;padding:18px;background:var(--tint);border-radius:12px;font-size:13px;line-height:1.8}code{font-family:ui-monospace,SFMono-Regular,monospace}.contact{display:flex;align-items:center;justify-content:space-between;gap:36px;margin-top:65px}.contact h3{font-size:24px}.contact p{font-size:14px;margin-top:12px}.support-note{font-size:12px;margin-top:25px}.site-footer{display:flex;align-items:center;gap:28px;border-top:1px solid var(--line);padding-block:30px 45px;font-size:12px;color:var(--muted)}.site-footer .brand{font-size:22px}.site-footer p{margin-right:auto}.site-footer>a:not(.brand){text-decoration:none}.site-footer>span{white-space:nowrap}
/* Privacy is a reading page; its substantive copy is preserved. */
.policy-page main{width:min(780px,calc(100% - 48px));margin:auto;padding:48px 0 80px}.policy-page nav{display:flex;align-items:center;gap:24px;margin-bottom:54px;font-size:14px}.policy-page nav .brand{margin-right:auto}.policy-page nav a{text-decoration:none}.policy-page h1{font-size:clamp(34px,5vw,50px);margin-bottom:24px}.policy-page h2{font-size:23px;margin:36px 0 12px}.policy-page p{margin:12px 0;line-height:1.9}.policy-page .card{background:var(--card);border:1px solid var(--line);border-radius:28px;padding:28px;margin:30px 0}.policy-page .notice{border-left:3px solid var(--green);padding-left:18px;font-size:14px}.policy-page .en{font-size:15px}.policy-page footer{margin-top:40px;font-size:13px}.policy-page nav img{width:36px}.policy-page .en h2{margin-top:0}
@media(max-width:1023px){.hero{grid-template-columns:1fr 1fr;gap:20px;min-height:570px}.hero-visual{height:450px}.phone-home{width:205px}.phone-compose{width:170px;top:70px}.personalize{gap:40px}.feature-layout{gap:40px}.flow{grid-template-columns:repeat(2,1fr);gap:36px}.nav{gap:22px}.nav-links{gap:18px}}
@media(max-width:767px){.shell{width:calc(100% - 40px)}.section{padding-block:58px}.nav{height:68px;gap:8px}.brand{font-size:20px;gap:6px}.brand img{width:30px;height:30px}.nav-links{gap:10px;font-size:11px}.nav-links a:first-child{display:none}.nav-tools{gap:0}.nav-tools button{min-width:44px;padding:6px;font-size:12px}.hero{grid-template-columns:1fr;gap:38px;padding-block:42px 46px;min-height:0}.hero-copy{padding:0}.hero h1{font-size:clamp(36px,9.7vw,58px);letter-spacing:-.045em}.eyebrow{font-size:12px;margin-bottom:20px}.hero-description{font-size:15px;margin-top:20px;max-width:330px}.hero-actions{margin-top:26px;gap:24px}.button{padding:12px 20px;min-height:50px;font-size:14px}.hero-visual{height:440px;max-width:360px;width:100%;margin:auto}.phone-home{width:204px;left:22px}.phone-compose{width:170px;right:12px;top:66px}.hero-visual:before{inset:22px 0 0}.release-note{flex-direction:column;gap:8px;font-size:12px;padding-block:22px}.personalize{grid-template-columns:1fr;gap:30px}.section-copy>p{max-width:none}.letter-preview{padding:25px 24px}.sample-note{font-size:20px;min-height:125px}.letter-caption{margin-top:24px}.section-heading{margin-bottom:30px}.section-heading p{font-size:15px}.screen-gallery{grid-auto-columns:225px;gap:28px;padding-left:20px;padding-right:20px}.gallery-controls{justify-content:flex-start;margin-bottom:26px}.screens-section{padding-bottom:35px}.flow{grid-template-columns:1fr;gap:28px}.flow li{padding-top:0;padding-left:38px}.flow li:before{left:0}.feature-layout{grid-template-columns:1fr;gap:30px}.feature-lead{padding:30px;min-height:290px}.feature-lead h3{font-size:28px}.feature-lead p{font-size:15px}.feature-details{gap:28px}.privacy-section{padding-top:26px;padding-bottom:60px;text-align:left}.privacy-section>img{margin-left:0}.privacy-section p{font-size:15px}.contact{align-items:flex-start;flex-direction:column;gap:22px;margin-top:40px}.contact h3{font-size:22px}summary{font-size:16px}details p{font-size:14px}.site-footer{display:grid;grid-template-columns:1fr auto;gap:18px;padding-block:26px 34px}.site-footer .brand{font-size:22px}.site-footer p{grid-row:2;grid-column:1/-1}.site-footer>span{grid-column:1/-1;font-size:11px}.policy-page main{width:calc(100% - 40px);padding-top:28px}.policy-page nav{gap:18px}.policy-page .card{padding:22px}}
@media(max-width:359px){.shell{width:calc(100% - 32px)}.nav{gap:6px}.nav .brand span{display:none}.brand{font-size:20px}.brand img{width:26px;height:26px}.nav-links{gap:10px}.nav-tools button{min-width:44px}.hero-visual{height:390px}.phone-home{width:180px;left:12px}.phone-compose{width:145px;right:4px}.hero-actions{gap:18px}.text-link{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media(prefers-reduced-transparency:reduce){.site-header{background:var(--bg);backdrop-filter:none}}