.hv3 .lesson-page{padding:48px 0 72px}.hv3 .lp-crumbs{font-family:var(--mono);color:var(--muted);flex-wrap:wrap;gap:8px;margin-bottom:18px;font-size:12px;display:flex}.hv3 .lp-crumbs a{color:var(--acc)}.hv3 .lesson-page .phead h1{font-size:44px}.hv3 .lp-meta{font-family:var(--mono);color:var(--muted);margin:10px 0 0;font-size:12.5px}.hv3 .lesson-diagram{border:1px solid var(--line);background:#06121a;border-radius:12px;max-width:632px;margin:24px 0 0;overflow:hidden}.hv3 .lesson-diagram img{width:100%;height:auto;display:block}.hv3 .lesson-intro{max-width:760px;color:var(--text);margin:22px 0 0;font-size:17px;line-height:1.6}.hv3 .lesson-blocks,.hv3 .lesson-gate-skel{gap:14px;max-width:760px;margin-top:22px;display:grid}.hv3 .lesson-block{border:1px solid var(--line);background:#060a13b8;border-radius:12px;padding:18px 20px}.hv3 .lesson-block.warning{border-color:#f5b54773}.hv3 .lesson-block.blocked{border-color:#f472b666}.hv3 .lb-head{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.hv3 .lb-tag{font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--acc);border:1px solid color-mix(in srgb,var(--acc) 50%,transparent);border-radius:4px;padding:2px 7px;font-size:10.5px}.hv3 .lesson-block h3{margin:0;font-size:17px}.hv3 .lesson-block p{color:var(--muted);margin:10px 0 0;font-size:15px;line-height:1.6}.hv3 .lesson-block ul{color:var(--muted);margin:10px 0 0;padding-left:20px;font-size:14.5px;line-height:1.6}.hv3 .lesson-block li::marker{color:var(--acc)}.hv3 .lesson-gate{max-width:760px;min-height:300px;margin-top:14px;position:relative}.hv3 .lesson-gate-skel{filter:blur(6px);opacity:.55;-webkit-user-select:none;user-select:none;pointer-events:none;margin-top:0}.hv3 .lesson-gate-over{justify-content:center;align-items:flex-start;padding-top:36px;display:flex;position:absolute;inset:0}.hv3 .lesson-gate-card{border:1px solid color-mix(in srgb,var(--acc) 55%,transparent);background:#060a13f0;border-radius:14px;flex-direction:column;align-items:flex-start;gap:8px;max-width:440px;margin:0 16px;padding:22px 24px;display:flex;box-shadow:0 18px 50px #00000080}.hv3 .lesson-gate-card b{font-size:18px}.hv3 .lesson-gate-card span{color:var(--muted);font-size:14px}.hv3 .lesson-gate-actions{flex-wrap:wrap;gap:10px;margin-top:8px;display:flex}.hv3 .lesson-gate-actions .btn{min-height:44px;padding:11px 18px;font-size:14.5px}.hv3 .lp-back{margin-top:28px;font-size:14px}.hv3 .lp-back a{color:var(--acc)}@media (max-width:600px){.hv3 .lesson-page{padding:32px 0 56px}.hv3 .lesson-page .phead h1{font-size:30px}.hv3 .lesson-block{padding:15px 16px}.hv3 .lesson-gate{min-height:330px}.hv3 .lesson-gate-over{padding-top:20px}.hv3 .lesson-gate-card{padding:18px}}