.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0)}
.brand-lockup{display:flex;align-items:center;gap:12px}
.fcit-logo{width:44px;height:44px;object-fit:contain;border-radius:8px;background:#fff;padding:3px}
.nav-toggle{display:none;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:7px;padding:9px 12px;font-weight:700}
.progress-tools{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin:-18px 0 20px}
.progress-action{display:flex;align-items:center;justify-content:center;min-height:38px;border:1px solid var(--line);border-radius:7px;background:var(--panel);color:var(--ink);padding:7px 9px;font-size:12px;font-weight:700;cursor:pointer}
.progress-tools .small{grid-column:1/-1;margin:0}
.chapter-number-note{font-size:13px;color:var(--muted);margin:-12px 0 12px}
.chapter-search{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin:32px 0;padding:20px;border:1px solid var(--line);background:var(--panel);border-radius:10px}
.search-control{display:grid;gap:7px}
.search-control input{min-height:46px;border:1px solid var(--line);border-radius:7px;background:var(--bg);color:var(--ink);padding:10px 13px}
.faq details{border-top:1px solid var(--line);padding:8px 0}.faq summary{cursor:pointer;font-weight:750;padding:9px 0}.faq details p{color:var(--muted)}
@media(max-width:900px){
 header{position:relative}.top{flex-direction:row;align-items:center;gap:12px;flex-wrap:wrap}
 .nav-toggle{display:inline-flex;margin-left:auto}
 .top nav{display:none!important;width:100%;flex-direction:column;align-items:stretch;gap:0!important}
 .top nav.is-open{display:flex!important}
 .top nav a,.top nav .theme{width:100%;padding:11px 4px;text-align:left;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent}
 .fcit-logo{width:40px;height:40px}
}
@media(max-width:760px){
 .course-sidebar{display:block;position:static;margin:0 0 24px;padding-bottom:18px;border-bottom:1px solid var(--line)}
 .course-sidebar>p,.course-sidebar>h2,.course-sidebar>nav{display:none}
 .course-progress{margin:0 0 10px;padding:14px}.progress-tools{margin:0 0 8px}
 .chapter-search{grid-template-columns:1fr;gap:12px;padding:16px}
 .course-intro #continueCourse{min-height:54px;font-size:16px;flex:1 1 100%}
}