:root{--bg: #0a111e;--panel: #0e1726;--panel-2: #131f33;--border: #22304a;--text: #e6edf6;--muted: #7e8aa3;--accent: #60a5fa;--good: #4ade80;--warn: #fbbf24;--bad: #f87171;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}.app{max-width:1100px;margin:0 auto;padding:24px 20px 48px}.app__header h1{margin:0;font-size:28px;letter-spacing:-.02em}.app__header p{margin:4px 0 16px;color:var(--muted)}.seg{display:inline-flex;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:4px;gap:4px}.seg__btn{background:transparent;color:var(--muted);border:none;padding:8px 18px;border-radius:7px;cursor:pointer;font-size:14px;font-weight:600}.seg__btn--on{background:var(--accent);color:#06101f}.layout{display:grid;grid-template-columns:300px 1fr;gap:20px;margin-top:22px}@media (max-width: 820px){.layout{grid-template-columns:1fr}}.panel{background:var(--panel);border:1px 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4px;margin-right:18px;font-size:15px;font-weight:600;cursor:pointer}.topnav__btn--on{color:var(--text);border-bottom-color:var(--accent)}.seg--sub{margin-bottom:18px}.lab__grid{display:grid;grid-template-columns:minmax(0,600px) 1fr;gap:20px}@media (max-width: 920px){.lab__grid{grid-template-columns:1fr}}.panel__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.panel__head h2{margin:0}.reset-btn{background:var(--panel-2);border:1px solid var(--border);color:var(--muted);border-radius:8px;padding:6px 12px;font-size:12px;cursor:pointer}.reset-btn:hover{color:var(--text)}.geocanvas__svg{width:100%;height:auto;border:1px solid var(--border);border-radius:10px;display:block;cursor:crosshair}.geocanvas__handle{cursor:grab}.geocanvas__handle:hover{fill:#1c2a44}.geocanvas__hint{font-size:11px;color:var(--muted);margin-top:8px;line-height:1.4}.muted{color:var(--muted)}.learn{display:grid;grid-template-columns:230px 1fr;gap:28px;align-items:start}@media 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p{color:#cbd5e1;margin:12px 0}.bullets{margin:12px 0;padding-left:20px;color:#cbd5e1}.bullets li{margin:7px 0}.diagram{width:100%;max-width:420px;height:auto;display:block;margin:16px 0;border:1px solid var(--border);border-radius:10px}.formula{background:var(--panel-2);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:8px;padding:12px 16px;margin:14px 0;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:15px;color:#e6edf6}.callout{display:flex;align-items:center;gap:10px;width:100%;text-align:left;background:#60a5fa14;border:1px solid rgba(96,165,250,.35);color:#bfdbfe;border-radius:10px;padding:12px 14px;margin:16px 0;font-size:14px;font-weight:600;cursor:pointer}.callout:hover{background:#60a5fa29}.callout__icon{color:var(--accent);font-size:11px}.term-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin-top:8px}.term{background:var(--panel-2);border:1px solid var(--border);border-radius:8px;padding:10px 12px}.term__name{font-weight:700;font-size:14px}.term__def{font-size:13px;color:var(--muted);margin-top:3px;line-height:1.4}.drone-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:18px 0}.drone-card{background:var(--panel-2);border:1px solid var(--border);border-radius:12px;overflow:hidden}.drone-art{width:100%;height:auto;display:block;border-bottom:1px solid var(--border)}.drone-card__body{padding:12px 14px}.drone-card__head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:6px}.drone-card__name{font-weight:700;font-size:15px;color:var(--text)}.drone-card__tag{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:3px 7px;border-radius:6px;white-space:nowrap}.drone-card__tag--multi{background:#60a5fa26;color:#93c5fd}.drone-card__tag--fixed{background:#4ade8026;color:#86efac}.drone-card__blurb{font-size:13px;color:#cbd5e1;margin:0 0 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