#flight-lesson{--paper:light-dark(#ffffff,#19222b);--ink:light-dark(#172e42,#e7edf3);--muted-ink:light-dark(#526779,#b2c0ce);--line:light-dark(#d8e1e8,#43505c);--accent-flight:light-dark(#146b89,#80d0e9);color:var(--ink);font-family:Arial,sans-serif;background:var(--paper);border:1px solid var(--line);border-radius:18px;overflow:hidden}
#flight-lesson *{box-sizing:border-box}#flight-lesson header{padding:24px 24px 0}#flight-lesson h2{margin:8px 0}#flight-lesson .eyebrow{color:var(--muted-ink);font-size:12px;letter-spacing:1.5px}#flight-lesson .subtitle{color:var(--muted-ink);margin:8px 0;font-size:14px;line-height:1.5}#flight-lesson .scene{position:relative;height:350px;margin:0 12px}#flight-lesson .plane{position:absolute;left:21%;top:31%;width:58%;height:39%;overflow:visible}#flight-lesson .force{position:absolute;z-index:2;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:11px 18px;min-height:44px;font:600 16px Arial;cursor:pointer}#flight-lesson .force:hover{border-color:var(--accent-flight)}#flight-lesson .force[aria-expanded=true]{background:var(--accent-flight);color:light-dark(#fff,#12232c);border-color:var(--accent-flight)}#flight-lesson .lift{left:50%;top:12px;transform:translateX(-50%)}#flight-lesson .weight{left:50%;bottom:8px;transform:translateX(-50%)}#flight-lesson .thrust{left:0;top:47%}#flight-lesson .drag{right:0;top:47%}#flight-lesson .arrows{position:absolute;width:100%;height:100%;inset:0;color:var(--accent-flight)}#flight-lesson .caption{margin:0;padding:8px 20px 20px;text-align:center;color:var(--muted-ink);font-size:12px;line-height:1.5}#flight-lesson .reading{padding:24px;border-top:1px solid var(--line)}#flight-lesson .reading[hidden]{display:none}#flight-lesson .reading-head{display:flex;align-items:center;justify-content:space-between;gap:12px}#flight-lesson .close{border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:8px;padding:8px 12px;cursor:pointer}#flight-lesson .reading p,#flight-lesson .reading li{font-size:15px;line-height:1.7}#flight-lesson .reading h3{font-size:16px;margin:22px 0 6px}#flight-lesson details{border-top:1px solid var(--line);margin-top:20px;padding-top:18px}#flight-lesson summary{cursor:pointer;color:var(--accent-flight);font-weight:600;padding:5px 0}#flight-lesson a{color:var(--accent-flight)}#flight-lesson .sources{font-size:12px!important;color:var(--muted-ink)}#flight-lesson .direction{color:var(--accent-flight);font-weight:600}
@media(max-width:460px){#flight-lesson header,#flight-lesson .reading{padding:18px}#flight-lesson .scene{height:290px;margin:0 6px}#flight-lesson .force{padding:10px;font-size:14px}#flight-lesson .plane{left:24%;width:52%}}