:root{--ink:#10233e;--muted:#607086;--blue:#1769aa;--sky:#dff1ff;--green:#2f9e6f;--yellow:#f4b942;--red:#d94b4b;--paper:#f5f8fc;--card:#fff;--line:#dce5ef;--shadow:0 12px 30px rgba(12,42,72,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;overflow-x:hidden}button,input{font:inherit}button{color:inherit}.skip-link{position:fixed;left:8px;top:-80px;z-index:99;background:#fff;padding:12px}.skip-link:focus{top:8px}.topbar{position:sticky;top:0;z-index:20;height:64px;background:rgba(245,248,252,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:8px max(16px,calc((100% - 980px)/2))}.brand{border:0;background:0;display:flex;align-items:center;gap:10px;font-weight:850;cursor:pointer}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:13px;background:var(--ink);color:white}.status-strip{display:flex;gap:12px}.status-strip span{white-space:nowrap}.status-strip span:nth-child(1){color:#ef7c34}.status-strip span:nth-child(2){color:#b07800}.status-strip span:nth-child(3){color:var(--red)}main{width:min(100%,980px);margin:auto;padding:20px 16px 112px}.hero{background:linear-gradient(135deg,#0b2447,#1769aa);color:#fff;border-radius:28px;padding:26px;position:relative;overflow:hidden;box-shadow:var(--shadow)}.hero:after{content:'✈';font-size:160px;opacity:.08;position:absolute;right:16px;bottom:-65px;transform:rotate(-10deg)}.eyebrow{font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;font-weight:850;color:var(--blue)}.hero .eyebrow{color:#9ed6ff}.hero h1{font-size:clamp(2rem,7vw,3.5rem);line-height:1.04;margin:6px 0 10px}.hero p{max-width:580px;color:#d9efff}.progress{height:10px;background:#dfe7ee;border-radius:99px;overflow:hidden}.progress>i{display:block;height:100%;background:var(--green);border-radius:inherit}.hero .progress{background:#ffffff30}.chapter{margin:32px 0}.chapter-head{display:flex;gap:14px;align-items:center;margin-bottom:16px}.chapter-num{display:grid;place-items:center;width:50px;height:50px;flex:0 0 auto;border-radius:18px;background:var(--sky);font-weight:900;color:var(--blue)}h2,h3,p{margin-top:0}.chapter h2{margin-bottom:2px}.chapter-head p{margin:0;color:var(--muted)}.lesson-path{display:grid;gap:14px;padding-left:24px;border-left:3px dashed #cbd9e6;margin-left:24px}.lesson-card{border:1px solid var(--line);background:var(--card);border-radius:22px;padding:16px;display:grid;grid-template-columns:56px 1fr auto;gap:14px;align-items:center;text-align:left;box-shadow:0 5px 18px rgba(12,42,72,.05);cursor:pointer;min-height:88px}.lesson-card:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow)}.lesson-card:disabled{opacity:.55;cursor:not-allowed}.lesson-card.done{border-color:#9ad5bc}.lesson-card.current{outline:3px solid #9ed6ff}.lesson-icon{display:grid;place-items:center;width:56px;height:56px;border-radius:18px;background:var(--sky);font-size:1.5rem}.done .lesson-icon{background:#dff5e9;color:var(--green)}.lesson-card small{display:block;color:var(--muted)}.stars{color:#b07800;white-space:nowrap}.bottom-nav{position:fixed;z-index:25;left:50%;bottom:max(10px,env(safe-area-inset-bottom));transform:translateX(-50%);width:min(calc(100% - 20px),620px);height:72px;background:#fff;border:1px solid var(--line);box-shadow:0 10px 35px #0b244733;border-radius:24px;display:grid;grid-template-columns:repeat(5,1fr);padding:5px}.bottom-nav button{border:0;background:transparent;border-radius:18px;min-width:44px;cursor:pointer;display:grid;place-items:center;padding:4px}.bottom-nav button span{font-size:1.35rem;line-height:1}.bottom-nav button small{font-size:.69rem}.bottom-nav button.active{background:var(--sky);color:var(--blue);font-weight:800}.screen-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:22px}.screen-head h1{margin:0}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}.panel,.aircraft-card,.award{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 5px 18px rgba(12,42,72,.05)}.panel h2{font-size:1.25rem}.aircraft-card{padding:0;overflow:hidden;cursor:pointer}.aircraft-card img,.lesson-image img{width:100%;height:190px;object-fit:contain;background:linear-gradient(#dff1ff,#eef5fa);display:block}.aircraft-card .body{padding:15px}.tag{display:inline-block;border-radius:99px;background:var(--sky);color:var(--blue);padding:4px 9px;font-size:.75rem;font-weight:750}.muted{color:var(--muted)}.primary,.secondary,.danger{border:0;border-radius:16px;padding:13px 18px;min-height:48px;font-weight:850;cursor:pointer}.primary{background:var(--blue);color:#fff;box-shadow:0 5px 0 #0c4e83}.primary:active{transform:translateY(3px);box-shadow:0 2px 0 #0c4e83}.secondary{background:var(--sky);color:var(--blue)}.danger{background:#ffe3e3;color:#a62626}.lesson-shell{max-width:760px;margin:auto}.lesson-top{display:grid;grid-template-columns:48px 1fr auto;gap:12px;align-items:center;margin-bottom:20px}.icon-btn{width:48px;height:48px;border-radius:50%;border:1px solid var(--line);background:#fff;cursor:pointer}.step{background:#fff;border:1px solid var(--line);border-radius:28px;padding:clamp(20px,5vw,36px);min-height:520px;box-shadow:var(--shadow);display:flex;flex-direction:column}.step h1{font-size:clamp(1.7rem,6vw,2.7rem);line-height:1.1}.step-copy{font-size:1.12rem;color:#42556c}.lesson-image{position:relative;border-radius:20px;overflow:hidden;margin:8px 0 16px;background:#eaf2f7}.lesson-image img{height:min(42vh,360px);cursor:zoom-in}.focus-note{border-left:4px solid var(--yellow);background:#fff6da;border-radius:0 14px 14px 0;padding:12px 14px}.options{display:grid;gap:12px;margin:16px 0}.option{min-height:58px;border:2px solid var(--line);background:#fff;border-radius:16px;text-align:left;padding:14px 16px;cursor:pointer;font-weight:700}.option:hover{border-color:#83bbe1}.option.selected{border-color:var(--blue);background:var(--sky)}.option.correct{border-color:var(--green);background:#e2f6eb}.option.wrong{border-color:var(--red);background:#ffeded}.feedback{padding:15px;border-radius:16px;margin-top:12px}.feedback.good{background:#e2f6eb;color:#176d48}.feedback.bad{background:#ffeded;color:#9c2f2f}.step-actions{margin-top:auto;padding-top:20px;display:flex;justify-content:flex-end;gap:12px}.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.compare-grid figure{margin:0;border:1px solid var(--line);border-radius:18px;overflow:hidden}.compare-grid img{width:100%;height:180px;object-fit:contain;background:var(--sky)}.compare-grid figcaption{padding:10px;font-weight:800}.summary-list{display:grid;gap:10px;padding:0;list-style:none}.summary-list li{background:var(--sky);padding:14px;border-radius:14px}.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.stat{background:#fff;border:1px solid var(--line);padding:16px;border-radius:18px}.stat b{display:block;font-size:1.8rem}.award.locked{filter:grayscale(1);opacity:.55}.modal{position:fixed;inset:0;z-index:50;background:#081421ed;padding:50px 16px 16px;display:grid;place-items:center}.modal[hidden]{display:none}.modal figure{margin:0;max-width:1100px;color:#fff}.modal img{max-width:100%;max-height:78vh;object-fit:contain}.modal-close{position:absolute;right:20px;top:15px;width:48px;height:48px;border:0;border-radius:50%;font-size:2rem}.empty{text-align:center;padding:50px 16px}.empty .big{font-size:4rem}.toast{position:fixed;z-index:80;left:50%;bottom:100px;transform:translateX(-50%);background:var(--ink);color:#fff;border-radius:14px;padding:12px 18px;box-shadow:var(--shadow)}
@media(max-width:560px){.brand span:last-child{display:none}.status-strip{gap:7px;font-size:.9rem}main{padding-inline:12px}.hero{padding:22px}.lesson-path{margin-left:14px;padding-left:12px}.lesson-card{grid-template-columns:48px 1fr;padding:12px}.lesson-icon{width:48px;height:48px}.lesson-card .stars{grid-column:2}.compare-grid{display:flex;overflow-x:auto;scroll-snap-type:x mandatory}.compare-grid figure{min-width:88%;scroll-snap-align:center}.step{min-height:calc(100vh - 175px);border-radius:22px}.bottom-nav small{font-size:.62rem}}
@media(min-width:800px){.stat-grid{grid-template-columns:repeat(4,1fr)}}
@media(prefers-reduced-motion:no-preference){button,.lesson-card{transition:.18s ease}.step{animation:rise .25s ease}@keyframes rise{from{opacity:0;transform:translateY(8px)}}}
:focus-visible{outline:3px solid var(--yellow);outline-offset:3px}
.fact-grid{display:grid;gap:12px;margin:18px 0}.fact-grid>div{display:grid;grid-template-columns:42px 1fr;gap:12px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:16px;background:#f8fbfe}.fact-grid b{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--sky);color:var(--blue)}.fact-grid span{font-weight:700}.lesson-gallery{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 2px 14px;margin:8px 0}.lesson-gallery figure{min-width:min(82%,360px);margin:0;border:1px solid var(--line);border-radius:18px;overflow:hidden;scroll-snap-align:start;background:#fff;cursor:zoom-in}.lesson-gallery img{display:block;width:100%;height:220px;object-fit:contain;background:var(--sky)}.lesson-gallery figcaption{display:flex;justify-content:space-between;gap:8px;align-items:center;padding:11px 13px}.lesson-gallery small{color:var(--muted);text-align:right}
.quiz-visual{margin:12px 0 6px;display:grid;grid-template-columns:1fr;gap:10px}.quiz-visual.multiple{grid-template-columns:repeat(2,minmax(0,1fr))}.quiz-visual figure{margin:0;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--sky)}.quiz-visual img{display:block;width:100%;height:min(30vh,260px);object-fit:contain}.quiz-visual.multiple img{height:min(24vh,210px)}.visual-hint{padding:10px 12px;border-radius:12px;background:#edf6fc;color:#3e607c;font-size:.92rem;font-weight:650}.quiz-visual+ .visual-hint{margin-bottom:8px}
.weapon-preview{margin:14px 0 0;padding-top:12px;border-top:1px solid var(--line);font-size:.9rem;color:#42556c}.armament{display:grid;grid-template-columns:48px 1fr;gap:14px;margin-top:22px;padding:18px;border-radius:20px;background:#eef6fc;border:1px solid #cfe3f2}.armament-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:16px;background:var(--ink);color:#fff;font-size:1.5rem}.armament h2{margin:0 0 6px}.armament p{margin-bottom:8px}.armament small{color:var(--muted)}
.cheat-panel,.backup-panel{margin-top:18px}.cheat-panel{background:linear-gradient(135deg,#fff7d6,#fff);border-color:#efd47a}.cheat-title{display:flex;align-items:center;gap:12px}.cheat-title>span{display:grid;place-items:center;width:48px;height:48px;border-radius:16px;background:#242038;color:#ffd84d;font-size:1.5rem}.cheat-title h2{margin:2px 0 0}.cheat-actions{display:flex;flex-wrap:wrap;gap:10px}.skip-picker{display:grid;gap:7px;margin:16px 0 10px;font-weight:800}.skip-picker select,.backup-panel textarea{width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--ink);padding:12px;font:inherit}.backup-panel textarea{resize:vertical;min-height:110px;font-family:ui-monospace,Consolas,monospace;font-size:.82rem}.cheat-panel button:disabled{opacity:.5;cursor:not-allowed}@media(max-width:560px){.cheat-actions>*{width:100%}.armament{grid-template-columns:40px 1fr}.armament-icon{width:40px;height:40px}}