.training-page{min-height:100vh;background:radial-gradient(ellipse at 15% 30%,#351316 0,transparent 35%),#090a0d}
.training-page .nav{width:100%;max-width:none;padding-inline:max(32px,calc((100vw - 1440px)/2))}
.training-page .nav .is-current{color:#fff}
.training-shell{width:min(1420px,100%);margin:auto;padding:66px 34px 80px}
.training-heading{max-width:760px;margin:0 0 34px auto;text-align:right}
.training-heading h1{margin:12px 0;font-size:clamp(34px,4vw,54px);line-height:1.35}
.training-heading>p:last-child{color:#aeb2b8;line-height:2}
.training-layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:22px;align-items:start}
.training-index,.lesson-card{border:1px solid #343037;border-radius:8px;background:linear-gradient(150deg,#14171d,#0e1116)}
.training-index{position:sticky;top:18px;padding:20px}
.training-index>strong{display:block;margin-bottom:14px;color:#f1f2f4;font-size:14px}
#training-chapters{display:grid;gap:7px}
.chapter-button{width:100%;padding:11px 12px;border:1px solid transparent;border-radius:5px;background:transparent;color:#adb2bb;text-align:right;font:inherit;cursor:pointer}
.chapter-button:hover{border-color:#493034;color:#fff}
.chapter-button[aria-current="step"]{border-color:#77353b;background:#271519;color:#ff8279}
.lesson-card{min-height:650px;padding:clamp(22px,4vw,50px)}
.lesson-meta{display:flex;justify-content:space-between;gap:12px;color:#ff766e;font-size:12px;font-weight:700}
.lesson-meta span:last-child{color:#a9adb5}
.lesson-card h2{margin:14px 0 24px;font-size:clamp(25px,3vw,38px)}
.lesson-art{display:grid;place-items:center;min-height:220px;margin:0 0 24px;padding:16px;border:1px solid #333943;border-radius:7px;background:#090d13;overflow:hidden}
.lesson-art svg{display:block;width:min(720px,100%);height:auto;max-height:270px}
.lesson-copy{color:#d1d4d9;font-size:15px;line-height:2.15}
.lesson-copy p{margin:0 0 12px}
.lesson-copy ul{margin:10px 0;padding-right:22px}
.lesson-copy li{margin:5px 0}
.lesson-tip{margin-top:20px;padding:15px 18px;border-right:3px solid #ed514c;background:#211417;color:#f0c4c1;line-height:1.9}
.lesson-progress{height:4px;margin-top:30px;border-radius:9px;background:#292d34;overflow:hidden}
.lesson-progress span{display:block;width:14.28%;height:100%;background:#ed514c;transition:width .2s}
.lesson-controls{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:20px}
.lesson-controls button{min-width:100px;padding:11px 18px;border:1px solid #414751;border-radius:5px;background:#171b22;color:#eee;font:inherit;cursor:pointer}
.lesson-controls button:hover:not(:disabled){border-color:#ff746d}
.lesson-controls button:disabled{opacity:.4;cursor:not-allowed}
.lesson-controls .next{border-color:#e44443;background:#d93637}
#lesson-page{color:#b7bbc2;font-size:13px}
.training-back{display:inline-block;margin-top:25px;color:#ff8279;text-decoration:none}
@media(max-width:850px){.training-layout{grid-template-columns:1fr}.training-index{position:static}.training-index #training-chapters{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-card{min-height:0}}
@media(max-width:600px){.training-shell{padding:38px 16px 55px}.training-page .nav{height:auto;min-height:78px;padding:16px}.training-page nav{gap:12px;flex-wrap:wrap;justify-content:flex-start}.training-page nav a{font-size:12px}.training-index #training-chapters{grid-template-columns:1fr}.lesson-art{min-height:160px}.lesson-copy{font-size:14px}}