:root{--revision-bg:#0a1422;--revision-surface:#111f30;--revision-line:#2a3b4f;--revision-text:#edf3f8;--revision-muted:#a4b4c5;--revision-accent:#80e0cc;color-scheme:dark}.revision-bar,.revision-bar *{box-sizing:border-box}.revision-bar{position:sticky;top:0;z-index:1000;background:rgba(10,20,34,.97);border-bottom:1px solid var(--revision-line);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--revision-text);isolation:isolate}.revision-bar-inner{width:min(1240px,calc(100% - 40px));margin:0 auto;min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:22px}.revision-wordmark{display:inline-flex;align-items:center;font-weight:850;font-size:1.45rem;letter-spacing:-.055em;white-space:nowrap;color:var(--revision-text);text-decoration:none}.revision-wordmark .spark-bolt{display:block;width:.58em;height:.88em;margin-left:.2em;color:var(--revision-accent);flex:0 0 auto;overflow:visible}.revision-nav{display:flex;align-items:center;gap:5px;flex-wrap:wrap}.revision-nav a{border-radius:9px;color:var(--revision-muted);padding:9px 13px;font-size:.86rem;font-weight:650;line-height:1.35;text-decoration:none;border:1px solid transparent}.revision-nav a:hover{color:var(--revision-text);background:#1c2c40}.revision-nav a[aria-current=page]{color:var(--revision-accent);background:#18312f;border-color:#2e514b}.revision-context{font-size:.72rem;color:var(--revision-muted);letter-spacing:.07em;text-transform:uppercase}.revision-skip{position:fixed;left:16px;top:-100px;z-index:2000;padding:12px;background:var(--revision-accent);color:#07151d;border-radius:8px}.revision-skip:focus{top:12px}.revision-sr-only{position:absolute!important;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.revision-bar a:focus-visible,.revision-dashboard :focus-visible{outline:3px solid var(--revision-accent);outline-offset:4px}body.revision-integrated{--bg:#0a1422;--surface:#111f30;--surface-2:#152639;--surface2:#152639;--line:#2a3b4f;--text:#edf3f8;--muted:#a4b4c5;--accent:#80e0cc;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}body.revision-integrated>.topbar{top:66px}body.revision-integrated>.course-jumpbar{top:139px}body.revision-integrated .topic-card{border-radius:18px}body.revision-integrated [hidden]{display:none!important}@media(max-width:700px){.revision-bar-inner{width:calc(100% - 28px);min-height:100px;gap:8px;padding:12px 0;flex-wrap:wrap}.revision-wordmark{font-size:1.3rem}.revision-context{margin-left:auto;font-size:.65rem}.revision-nav{width:100%;order:3;justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:thin}.revision-nav a{padding:7px 9px;font-size:.76rem;flex:0 0 auto}body.revision-integrated>.course-jumpbar,body.revision-integrated>.topbar{top:100px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}*,:after,:before{transition:none!important;animation:none!important}}body.revision-marking>div>header{position:static}optgroup,option,select{color-scheme:dark;background-color:#111f30;color:#edf3f8}.readingLibraryShell,.revision-marking{color-scheme:light}.readingLibraryShell :is(select,option,optgroup),.revision-marking :is(select,option,optgroup){color-scheme:light;background-color:#fff;color:#17212b}