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14px}.ls-trail-narrow li .ls-trail-row.is-finish:after{top:92px}.ls-trail-row.is-finish .ls-finish-copy{position:static}.ls-trail-narrow{text-align:left;flex-direction:column-reverse;margin:22px 0 0;padding:0;list-style:none;display:none}.ls-trail-row:hover:not(:disabled){background:0 0}.ls-trail-row{width:100%;font:inherit;color:inherit;text-align:left;cursor:pointer;background:0 0;border:0;border-radius:20px;align-items:center;gap:14px;padding:12px 14px;display:flex;position:relative}.ls-trail-narrow li:not(:first-child) .ls-trail-row:after{content:"";border-left:4px dotted var(--ls-trail-line);position:absolute;top:64px;bottom:-8px;left:39px}.ls-trail-node-sm{border:3px solid var(--tone-ink,var(--border-strong));background:var(--tone-bg,var(--surface));width:52px;height:52px;box-shadow:0 4px 0 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32px;width:32px;height:32px;display:block}.ls-free:hover:not(:disabled){background:var(--accent-soft);border-color:var(--accent-hover);box-shadow:0 4px 0 var(--border)}.ls-free:active:not(:disabled){box-shadow:0 1px 0 var(--border);transform:translateY(2px)}.ls-free:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.ls-next{background:var(--chip);color:var(--muted);border-radius:999px;margin:4px 0 0;padding:10px 20px;font-size:13.5px}.ls-next b{color:var(--text);font-weight:700}.ls-skeleton{background:var(--sunk);border-radius:24px;height:320px;margin-top:26px;animation:1.4s ease-in-out infinite ls-skeleton}@keyframes ls-skeleton{0%,to{opacity:.55}50%{opacity:.9}}@media (max-width:980px){.ls-trail-wide{display:none}.ls-trail-narrow{display:flex}.lesson-start{margin:56px auto 40px;padding:0 16px}.ls-start,.ls-free{width:100%;min-width:0}}@media (prefers-reduced-motion:reduce){.ls-skeleton{animation:none}.ls-trail-node:hover:not(:disabled),.ls-trail-node:active:not(:disabled),.ls-start:hover:not(:disabled),.ls-start:active:not(:disabled),.ls-free:active:not(:disabled){transform:none}}.mlp{z-index:58;background:var(--bg);flex-direction:column;display:flex;position:fixed;inset:0}.mlp-top{flex-shrink:0;align-items:center;gap:16px;width:100%;max-width:760px;margin:0 auto;padding:16px 20px 12px;display:flex}.mlp-close{width:38px;height:38px;color:var(--muted-2);cursor:pointer;background:0 0;border:0;border-radius:50%;flex-shrink:0;place-items:center;padding:0;transition:background .14s,color .14s;display:grid}.mlp-close:hover:not(:disabled){background:var(--neutral-box);color:var(--text)}.mlp-track{flex:1;gap:6px;display:flex}.mlp-seg{background:var(--neutral-box);border-radius:999px;flex:1;height:12px;transition:background .32s cubic-bezier(.22,.61,.36,1)}.mlp-seg.is-ok{background:var(--accent)}.mlp-seg.is-err{background:color-mix(in srgb, var(--accent) 34%, var(--neutral-box))}.mlp-seg.is-current{box-shadow:0 0 0 3px var(--accent-soft)}.mlp-stage{flex-direction:column;flex:1;padding:4px 20px 28px;display:flex;overflow-y:auto}.mlp-task{width:100%;max-width:720px;margin:auto;animation:.3s cubic-bezier(.22,.61,.36,1) both mlp-task-in}.mlp-task-head{color:var(--muted);align-items:center;gap:10px;margin:8px 0 14px;font-size:14px;font-weight:500;display:flex}.mlp-task-num{background:var(--accent-soft);width:30px;height:30px;color:var(--accent);font-variant-numeric:tabular-nums;border-radius:50%;place-items:center;font-size:14px;font-weight:700;display:grid}.mlp-card{border:1px solid var(--border);background:var(--surface);border-radius:24px;padding:26px 28px;position:relative;overflow:hidden;box-shadow:0 2px 14px 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