#sentence-concept{color:var(--ink);font:15px/1.6 system-ui,sans-serif}
#sentence-concept *{box-sizing:border-box}#sentence-concept [hidden]{display:none!important}
#sentence-concept .page{background:var(--bg);padding:28px 40px 32px;min-height:680px}
#sentence-concept header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 0 22px;border-bottom:1px solid color-mix(in srgb,var(--line) 55%,transparent);padding-right:72px}
#sentence-concept .wordmark{font:34px/1 Georgia,serif;letter-spacing:-1.5px}
#sentence-concept nav{display:flex;align-items:center;gap:24px}#sentence-concept nav a:not(.open-app){color:var(--muted)}#sentence-concept a{color:inherit;text-decoration:none;font-size:13px;display:inline-flex;align-items:center;min-height:44px}
#sentence-concept .hero{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;padding:48px 0 32px}
#sentence-concept h1{font:normal clamp(40px,5.7vw,62px)/1.06 Georgia,serif;letter-spacing:-.045em;margin:18px 0 24px}
#sentence-concept .eyebrow{font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted)}
#sentence-concept .intro{color:var(--muted);max-width:310px;margin-bottom:28px}
#sentence-concept button{font:14px/1.4 system-ui,sans-serif;min-height:48px;padding:12px 18px;border-radius:9px;border:1px solid var(--line);background:transparent;color:var(--ink)}
#sentence-concept .primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}
#sentence-concept .small{font-size:12px;color:var(--muted);margin-top:12px}
#sentence-concept .reader{position:relative;isolation:isolate;border-radius:20px;overflow:hidden;background:#161d21;color:#f2efe7;min-height:440px;display:flex;flex-direction:column;box-shadow:0 16px 38px #0002;border:1px solid #ffffff24;touch-action:pan-y}
#sentence-concept .art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;opacity:.65}
#sentence-concept .shade{position:absolute;inset:0;background:linear-gradient(#10171b88,#10171bdd 48%,#10171b99);z-index:-1}
#sentence-concept .reader-top{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;font-size:12px;color:#deded6;gap:12px}
#sentence-concept .reader-top button{color:inherit;border:0;padding:8px;min-height:44px;font-size:12px}
#sentence-concept .passage{flex:1;display:flex;flex-direction:column;justify-content:center;padding:16px 30px;min-height:265px}
#sentence-concept .passage p{font:25px/1.5 Georgia,serif;margin:0;letter-spacing:-.01em}
#sentence-concept .chapter{font:10px/1.5 system-ui,sans-serif;letter-spacing:.14em;text-transform:uppercase;color:#c5cbc8;margin-bottom:22px}
#sentence-concept .reader-bottom{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-top:1px solid #ffffff26;gap:10px;font-size:11px;color:#d2d6d2}
#sentence-concept .reader-bottom button{color:#f2efe7;border:0;padding:10px;min-width:44px;font-size:18px}#sentence-concept button:disabled{opacity:.35}
#sentence-concept .below{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:22px;font-size:12px;color:var(--muted)}
#sentence-concept .centered .hero{display:flex;flex-direction:column;gap:12px;padding-top:30px;text-align:center}
#sentence-concept .centered h1{font-size:44px;max-width:660px;margin:12px auto}
#sentence-concept .centered .intro{max-width:550px;margin:12px auto 18px}
#sentence-concept .centered .reader{width:100%;min-height:300px;text-align:left}
#sentence-concept .centered .passage{min-height:150px;max-width:650px;margin:auto;padding:20px 40px}
#sentence-concept .centered .reader-top{padding:10px 24px}#sentence-concept .centered .reader-bottom{padding:8px 20px}
@media(max-width:640px){#sentence-concept .page{padding:22px 20px;min-height:1080px}#sentence-concept header{padding-right:0;flex-wrap:wrap}#sentence-concept nav{gap:16px}#sentence-concept .hero{grid-template-columns:1fr;gap:24px;padding-top:28px}#sentence-concept h1{font-size:44px}#sentence-concept .reader{min-height:400px}#sentence-concept .below{flex-wrap:wrap}#sentence-concept .centered h1{font-size:38px}#sentence-concept .centered .passage{padding:24px;min-height:230px}#sentence-concept .passage p{font-size:23px}}
#sentence-concept nav .open-app{background:var(--ink);color:var(--bg);padding:0 14px;border-radius:8px;height:48px;min-height:48px;font-weight:500;white-space:nowrap}
@media(max-width:420px){#sentence-concept header{align-items:flex-start}#sentence-concept nav{flex-wrap:wrap;gap:8px 16px}}


#sentence-concept .home-section{padding:40px 0;border-top:1px solid var(--line)}
#sentence-concept .section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}
#sentence-concept h2{font:normal 30px/1.2 Georgia,serif;letter-spacing:-.03em;margin:0}
#sentence-concept .book-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
#sentence-concept .book-item{display:block;min-width:0}
#sentence-concept .book-item img{width:100%;aspect-ratio:2/3;object-fit:contain;border-radius:5px;display:block}
#sentence-concept h3{font:normal 20px/1.25 Georgia,serif;margin:16px 0 4px}
#sentence-concept .book-item p{color:var(--muted);font-size:12px;margin:0}
#sentence-concept .own-book{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:40px}
#sentence-concept .own-book p{color:var(--muted);max-width:320px;margin:16px 0}
#sentence-concept .file-example{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:28px}
#sentence-concept .file-name{display:flex;align-items:center;gap:12px;font-size:13px;padding-bottom:20px;border-bottom:1px solid var(--line)}
#sentence-concept .file-example blockquote{font:22px/1.5 Georgia,serif;margin:24px 0 8px}
#sentence-concept .file-example small{color:var(--muted);font-size:12px}
#sentence-concept .faq-layout{display:grid;grid-template-columns:1fr 2fr;gap:40px}
#sentence-concept details{border-bottom:1px solid var(--line)}
#sentence-concept summary{padding:18px 0;min-height:56px;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:14px}
#sentence-concept summary::-webkit-details-marker{display:none}
#sentence-concept summary:after{content:'+';font-size:20px;color:var(--muted)}
#sentence-concept details[open] summary:after{content:'−'}
#sentence-concept details p{margin:0 0 20px;color:var(--muted);font-size:14px}
#sentence-concept footer{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:24px}
#sentence-concept footer .wordmark{font-size:26px}#sentence-concept footer nav{gap:20px;flex-wrap:wrap}
@media(max-width:640px){#sentence-concept .home-section{padding:32px 0}#sentence-concept .book-grid{gap:16px}#sentence-concept h3{font-size:17px}#sentence-concept .own-book,#sentence-concept .faq-layout{grid-template-columns:1fr;gap:24px}#sentence-concept .page{min-height:0}#sentence-concept h2{font-size:27px}}
@media(max-width:380px){#sentence-concept .book-grid{grid-template-columns:1fr 1fr}}

#sentence-concept{max-width:1160px;margin:auto}#sentence-concept header{padding-right:0}#sentence-concept .page{min-height:0}#sentence-concept a:focus-visible,#sentence-concept button:focus-visible,#sentence-concept summary:focus-visible{outline:2px solid var(--ink);outline-offset:4px}#sentence-concept button,#sentence-concept summary{cursor:pointer}#sentence-concept footer .site-theme{font-size:13px;min-height:44px;padding:8px 12px}#sentence-concept .reader:focus-visible{outline:2px solid var(--ink);outline-offset:4px}
html:has(.home-page){scrollbar-width:none}html:has(.home-page)::-webkit-scrollbar{display:none}