:root{--paper:#F4F4F0;--card:#fff;--ink:#1A1A1A;--muted:#6B6B65;--line:#E2E2DC;--note:#F4F4F0;--yellow:#FFE45C;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.75 -apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif}a{color:inherit;text-underline-offset:5px}button{font:inherit;cursor:pointer}a,button{touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible,[role=button]:focus-visible{outline:3px solid var(--ink);outline-offset:5px}.skip{position:absolute;left:20px;top:-100px;background:var(--yellow);color:#1A1A1A;padding:12px;z-index:20}.skip:focus{top:10px}.wrap,.nav{width:min(1160px,calc(100% - 96px));margin:auto}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:27px 0;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-size:19px;font-weight:650;line-height:1.3;white-space:nowrap}.brand small{display:block;color:var(--muted);font-size:10px;letter-spacing:1.6px;font-weight:400;margin-top:5px}.nav nav{display:flex;align-items:center;gap:32px;font-size:13px}.nav nav a{text-decoration:none;display:inline-flex;align-items:center;min-height:44px}.nav nav a:hover{text-decoration:underline}.nav-install{border:1px solid var(--ink);border-radius:7px;padding:0 17px;gap:20px}.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;padding:95px 0 72px}.eyebrow{font-size:11px;letter-spacing:1.2px;color:var(--muted);margin:0 0 23px;display:flex;align-items:center;gap:9px}.yellow-square{display:inline-block;width:10px;height:10px;flex-shrink:0;background:var(--yellow);border-radius:2px}.hero h1{font-size:clamp(38px,4.7vw,61px);line-height:1.3;font-weight:650;letter-spacing:-2.4px;margin:0 0 26px}.hero h1 em{font-style:normal;position:relative;z-index:0;white-space:nowrap}.hero h1 em:before{content:'';position:absolute;left:-3px;right:-3px;bottom:5px;height:42%;background:var(--yellow);z-index:-1;transform:rotate(-2deg)}.period{margin-left:0}.lead{font-size:16px;line-height:1.95;color:var(--muted);margin:0}.actions{display:flex;align-items:center;gap:28px;margin-top:31px}.button{display:inline-flex;justify-content:space-between;align-items:center;gap:32px;min-height:49px;border-radius:7px;text-decoration:none;padding:11px 21px;font-size:14px;font-weight:550;border:1px solid var(--ink)}.primary{background:var(--ink);color:var(--card)}.outline{background:transparent;color:var(--ink)}.button:hover{filter:brightness(.88)}.text-link{font-size:13px;display:inline-flex;align-items:center;gap:16px;min-height:44px}.fine{font-size:11px;line-height:1.8;color:var(--muted)}.hero-fine{margin-top:21px;word-spacing:6px}.hero-visual{position:relative;padding:0 0 55px 7px;min-width:0}.reading-sheet{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:28px 30px 114px;transform:rotate(2deg);min-height:400px}.sheet-meta{display:flex;justify-content:space-between;font-size:9px;letter-spacing:1.5px;color:var(--muted);padding-bottom:18px;border-bottom:1px solid var(--line)}.article-kicker{font-size:9px;letter-spacing:1.4px;margin:26px 0 14px;color:var(--muted)}.sample-sentence{font:23px/1.8 Georgia,serif;margin:0;color:var(--ink)}mark{background:var(--yellow);color:#1A1A1A;padding:0 3px;border-radius:2px}.article-rule{height:1px;background:var(--line);margin:25px 0}.sheet-lines{font:14px/1.8 Georgia,serif;color:var(--muted)}.sample-card{position:relative;margin:-171px 5px 0 49px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 23px 16px;box-shadow:0 18px 45px #1A1A1A13;transform:rotate(-1deg)}.sample-card figcaption{display:flex;justify-content:space-between;align-items:center;gap:10px}.sample-word{font:20px Georgia,serif}.sample-word small{font-size:11px;color:var(--muted);margin-left:8px}.card-caption{font-size:9px;color:var(--muted)}.meaning{font:500 34px/1.3 Georgia,'Songti SC','Noto Serif SC',serif;margin:16px 0 10px;display:flex;align-items:center;gap:12px}.pos{font:11px/1.4 system-ui;background:var(--note);border:1px solid var(--line);border-radius:5px;padding:3px 7px}.source-line{display:flex;gap:8px;align-items:center;font-size:10px;color:var(--muted);flex-wrap:wrap}.tag{background:var(--yellow);color:#1A1A1A;padding:2px 6px;border-radius:3px}.english-label{font-size:10px;color:var(--muted);margin:16px 0 4px;letter-spacing:.5px}.english-definition{font:14px/1.65 Georgia,serif;margin:0}.card-context{border-left:3px solid var(--ink);padding-left:10px;color:var(--muted);font:12px/1.7 Georgia,serif;margin:14px 0}.card-action{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);min-height:44px;font-size:11px;text-decoration:none}.visual-note{position:absolute;bottom:6px;right:3px;font-size:10px;color:var(--muted);margin:0}.capabilities{border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;padding:22px 0;font-size:12px;color:var(--muted)}.capabilities span:before{content:'＋';margin-right:10px;color:var(--ink)}.section{padding-top:90px;padding-bottom:90px}h2{font-size:clamp(28px,3.2vw,40px);line-height:1.45;letter-spacing:-1px;font-weight:600;margin:0}h3{font-size:19px;line-height:1.5;font-weight:550}.difference{display:grid;grid-template-columns:1fr 1.2fr;gap:90px}.body-large{font-size:18px;line-height:1.9;margin:0 0 30px}.editorial-list{margin:0}.editorial-list>div{display:grid;grid-template-columns:83px 1fr;gap:20px;border-top:1px solid var(--line);padding:20px 0}.editorial-list dt{font-size:13px;font-weight:600}.editorial-list dd{margin:0;font-size:13px;color:var(--muted)}.workflow-band{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.horizontal{display:flex;align-items:end;justify-content:space-between;gap:30px}.horizontal>p{font-size:13px;color:var(--muted);margin:0 0 5px}.workflow{list-style:none;padding:0;margin:45px 0 35px;display:grid;grid-template-columns:repeat(3,1fr);gap:45px}.workflow li{border-top:1px solid var(--line);padding-top:22px}.step{font:italic 30px Georgia,serif;color:var(--muted)}.workflow h3{margin:20px 0 10px}.workflow p{font-size:13px;color:var(--muted);max-width:280px;margin:0}.secondary-features{display:flex;gap:40px;align-items:baseline;border-top:1px solid var(--line);padding-top:25px;font-size:12px}.secondary-features span{font-weight:600;white-space:nowrap}.secondary-features p{color:var(--muted);margin:0}.experience{display:grid;grid-template-columns:1fr 1.3fr;gap:80px;align-items:center}.trial-intro>p:not(.eyebrow){font-size:13px;color:var(--muted);margin:22px 0 14px}.trial-paper{border:1px solid var(--line);background:var(--card);border-radius:11px;padding:24px 29px}.trial-header,.trial-footer{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:10px;color:var(--muted)}.trial-header>span{letter-spacing:1.4px}.trial-paper button{border:0;background:transparent;color:var(--ink);font-size:11px;min-height:44px;padding:5px 0;text-decoration:underline;text-underline-offset:5px}.trial-header{border-bottom:1px solid var(--line);padding-bottom:7px}#trial-sentence{font:27px/1.85 Georgia,serif;margin:26px 0 30px}#trial-sentence [data-word]{cursor:pointer}#trial-sentence [data-word]:hover,#trial-sentence [data-word]:focus-visible{background:var(--yellow);color:#1A1A1A}.trial-footer{border-top:1px solid var(--line);padding-top:10px}.trial-footer>span{display:flex;align-items:center;gap:7px}.trial-paper>.fine{border-top:1px solid var(--line);margin:10px 0 0;padding-top:14px;font-size:10px}.install-section{background:var(--card);border-block:1px solid var(--line)}.install-heading{display:flex;justify-content:space-between;align-items:baseline;gap:24px}.install-heading>p{font-size:13px;color:var(--muted)}.install-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;margin-top:33px}.install-option{border-top:1px solid var(--ink);padding:25px 0 5px}.option-type{font-size:11px;color:var(--muted)}.install-option h3{margin:13px 0}.install-option>p:not(.fine){font-size:13px;color:var(--muted);margin:0 0 25px}.install-option .button{min-width:222px}.sub-link{display:block;margin-top:15px;font-size:11px;width:fit-content;min-height:30px}.install-option>.fine{margin:15px 0 0}.release-note{font-size:11px;color:var(--muted);background:var(--note);padding:15px 18px;border-left:3px solid var(--ink);margin:32px 0 0}.release-note strong{font-weight:550;color:var(--ink)}.privacy{display:grid;grid-template-columns:1fr 1.2fr;gap:90px}.privacy h2{font-size:28px;margin-bottom:20px}.faq details{border-top:1px solid var(--line)}.faq details:last-child{border-bottom:1px solid var(--line)}summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;font-size:13px;padding:20px 0;min-height:60px}summary::-webkit-details-marker{display:none}summary:after{content:'＋';font-size:17px}details[open] summary:after{content:'−'}.faq details p{font-size:12px;color:var(--muted);margin:0 25px 23px 0}footer.wrap{border-top:1px solid var(--line);padding:28px 0 34px;display:flex;align-items:center;justify-content:space-between;gap:30px}footer .brand{font-size:15px}footer .brand small{font-size:9px}footer>span{font-size:10px;color:var(--muted)}footer>div{display:flex;gap:22px;font-size:11px}footer>div a{display:flex;align-items:center;min-height:44px}.preview-banner{display:none}
@media(min-width:1200px){.hero-visual{margin-top:20px}.hero-copy{padding-bottom:45px}}
@media(max-width:900px){.wrap,.nav{width:calc(100% - 48px)}.hero{gap:28px;padding:65px 0 50px}.hero h1{font-size:42px;letter-spacing:-1.7px}.lead{font-size:14px}.actions{gap:18px;flex-wrap:wrap}.sample-card{margin-left:15px;padding:16px}.reading-sheet{padding:22px 22px 100px}.sample-sentence{font-size:20px}.visual-note{font-size:9px}.difference,.privacy{gap:40px}.experience{gap:35px}.workflow{gap:25px}.section{padding-top:65px;padding-bottom:65px}.trial-paper{padding:18px}#trial-sentence{font-size:24px}.body-large{font-size:16px}.nav nav{gap:22px}footer>span{display:none}}
@media(max-width:640px){.wrap,.nav{width:calc(100% - 40px)}.nav{padding:20px 0}.brand{font-size:17px}.brand img{width:34px;height:34px}.nav nav{gap:12px}.nav nav a{font-size:12px}.nav nav a:first-child{display:none}.nav-install{padding:0 12px;gap:10px}.hero{display:block;padding-top:46px;padding-bottom:30px}.hero h1{font-size:43px;letter-spacing:-1.8px;margin-bottom:23px}.hero .eyebrow{font-size:10px;letter-spacing:.5px;margin-bottom:22px}.lead{font-size:14px}.hero-copy{padding-bottom:40px}.hero-visual{padding-left:0;padding-bottom:42px;max-width:440px;margin:auto}.reading-sheet{min-height:360px;padding:22px 23px 90px;transform:rotate(1deg)}.sample-sentence{font-size:22px}.sample-card{margin:-150px 0 0 25px;padding:20px}.visual-note{right:0;bottom:9px;font-size:9px}.capabilities{display:grid;grid-template-columns:1fr 1fr;gap:12px 15px;font-size:11px;padding:19px 0}.section{padding-top:52px;padding-bottom:52px}.difference,.experience,.privacy{display:block}.difference-copy{margin-top:28px}.section .eyebrow{font-size:10px;margin-bottom:18px}h2{font-size:30px}.editorial-list>div{grid-template-columns:72px 1fr;gap:15px;padding:17px 0}.horizontal{display:block}.horizontal>p{margin-top:19px}.workflow{display:block;margin-top:30px;margin-bottom:25px}.workflow li{display:grid;grid-template-columns:46px 1fr;gap:0 12px;padding:20px 0}.step{grid-row:1/3;font-size:26px}.workflow h3{margin:0 0 8px;font-size:18px}.workflow p{max-width:none}.secondary-features{display:block;padding-top:20px}.secondary-features p{margin-top:9px}.trial-paper{margin-top:27px;padding:18px 22px}#trial-sentence{font-size:25px;margin-top:24px}.trial-intro>p:not(.eyebrow){margin:19px 0 8px}.install-heading{display:block}.install-heading>p{margin:16px 0 0}.install-grid{display:block;margin-top:28px}.install-option{padding-bottom:28px}.install-option+.install-option{padding-top:25px}.install-option .button{width:100%}.release-note{margin-top:0}.privacy h2{margin-bottom:12px}.faq{margin-top:26px}footer.wrap{align-items:start;flex-wrap:wrap;gap:20px;padding-top:23px}footer>div{gap:20px}footer .brand small{font-size:9px}}
@media(prefers-color-scheme:dark){:root{--paper:#16161A;--card:#1E1E22;--ink:#F2F2EE;--muted:#A6A6A0;--line:#34343A;--note:#26262B;color-scheme:dark}.hero h1 em:before{background:var(--yellow)}.hero h1 em{color:#1A1A1A;background:var(--yellow);padding:0 3px}.hero h1 em:before{display:none}.sample-card{box-shadow:0 18px 45px #0004}a:focus-visible,button:focus-visible,summary:focus-visible,[role=button]:focus-visible{outline-color:var(--yellow)}.primary{background:#F2F2EE;color:#1A1A1A}.button:hover{filter:brightness(.94)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
/* Full feature guide and controls reuse the existing reader APIs. */
.feature-section{border-top:1px solid var(--line)}.control-guide{display:grid;grid-template-columns:220px 1fr;gap:48px;padding:30px 34px;background:var(--card);border:1px solid var(--line);border-radius:10px;margin-top:34px;align-items:center}.control-illustration{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap}.book-state{width:52px;height:52px;border-radius:12px;display:grid;place-items:center}.book-state svg{width:30px;height:30px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}.book-state.closed{background:#1A1A1A;color:#FFE45C}.book-state.open{background:#FFE45C;color:#1A1A1A}.state-arrow{font-size:20px;color:var(--muted)}.control-illustration small{flex-basis:100%;text-align:center;font-size:10px;color:var(--muted)}.guide-kicker{font-size:11px;color:var(--muted);margin:0 0 10px}.control-copy h3{margin:0 0 12px;font-size:21px}.control-copy h3 mark{padding:3px 5px}.control-copy>p:not(.guide-kicker){font-size:12px;color:var(--muted);margin:0}.control-copy .text-link{margin-top:7px}.text-link.guide-settings{background:none;color:var(--ink);border:0;padding:0;text-decoration:underline;cursor:pointer}kbd{font:10px system-ui;border:1px solid var(--line);border-bottom-width:2px;padding:2px 5px;border-radius:3px;color:var(--ink)}.feature-index{display:grid;grid-template-columns:1fr 1fr;gap:0 55px;margin:33px 0 0}.feature-index>div{border-bottom:1px solid var(--line);padding:23px 0}.feature-index dt{font-size:15px;font-weight:550;display:flex;gap:16px;align-items:center}.feature-index dt>span{font:italic 17px Georgia,serif;color:var(--muted)}.feature-index dd{font-size:12px;color:var(--muted);margin:12px 0 0 33px}.experience-band{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.experience{align-items:start}.trial-intro>p{max-width:350px}.trial-intro strong{font-weight:550;color:var(--ink)}.trial-entry-links{display:flex;align-items:start;flex-direction:column;gap:3px}.trial-entry-links .text-link{min-height:38px}.trial-mode-controls{display:grid;grid-template-columns:1fr 1fr;gap:15px;padding-top:17px}.trial-mode-controls label{display:flex;flex-direction:column;font-size:10px;gap:5px;color:var(--muted)}.trial-mode-controls select{font:12px system-ui;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:5px;min-height:44px;padding:8px 10px;width:100%}.trial-mode-controls select:disabled{opacity:.7}.trial-mode-controls select:focus-visible,.custom-trial textarea:focus-visible{outline:3px solid var(--ink);outline-offset:3px}.trial-state{margin:12px 0 0;border-bottom:1px solid var(--line);padding-bottom:14px}#trial-article>p{font:22px/1.85 Georgia,serif;margin:23px 0}#trial-article [data-word]{cursor:pointer}#trial-article [data-word]:hover,#trial-article [data-word]:focus-visible{background:#FFE45C;color:#1A1A1A}#trial-article .lextide-translation{font:14px/1.9 system-ui;background:var(--note);color:var(--ink);border-left:3px solid var(--ink);padding:12px 15px;margin:10px 0 24px;border-radius:0}.trial-footer{flex-wrap:wrap;gap:7px 15px}.trial-paper .custom-trial{border-top:1px solid var(--line);margin-top:10px}.custom-trial summary{font-size:11px;min-height:50px;padding:12px 0}.custom-trial label{display:block;font-size:10px;color:var(--muted)}.custom-trial textarea{font:13px/1.7 Georgia,serif;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:5px;width:100%;resize:vertical;padding:11px;margin-top:10px}.custom-trial button{padding:7px 13px;margin-top:9px;text-decoration:none;border:1px solid var(--ink);border-radius:5px}.trial-paper .fine{font-size:10px}
@media(max-width:900px){.control-guide{grid-template-columns:170px 1fr;gap:26px;padding:25px}.feature-index{gap:0 30px}.control-copy h3{font-size:19px}}
@media(max-width:640px){.control-guide{display:block;padding:23px 20px}.control-illustration{justify-content:start;margin-bottom:23px;max-width:210px}.control-illustration small{text-align:left}.control-copy h3{font-size:18px;line-height:1.8}.feature-index{display:block;margin-top:20px}.feature-index dd{margin-left:31px}.feature-index dt{font-size:14px}.trial-intro>p{max-width:none}#trial-article>p{font-size:22px}.trial-mode-controls{gap:12px}.trial-footer button{font-size:10px}.feature-section .horizontal .text-link{margin-top:15px}}
@media(prefers-color-scheme:dark){.trial-mode-controls select:focus-visible,.custom-trial textarea:focus-visible{outline-color:#FFE45C}}
/* Scope the translation appearance to this demo; keep reader behavior unchanged. */
#trial-article .lextide-translation{color:var(--ink)!important;background:var(--note)!important;font:14px/1.9 -apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC',sans-serif!important;border-left:3px solid var(--ink)!important;padding:10px 14px!important;border-radius:0!important}
.trial-entry-links .text-link{min-height:44px}.sub-link{min-height:44px;display:flex;align-items:center}