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var(--space-2)}.lv-capstone-desc{font-size:var(--text-sm);color:var(--text-secondary);margin:0 0 var(--space-4)}.lv-topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-4)}.lv-back{font-family:var(--font-body);font-size:var(--text-sm);color:var(--text-muted);background:none;border:none;cursor:pointer;padding:0}.lv-back:hover{color:var(--gold-400)}.lv-module-header{margin-bottom:var(--space-6);padding-bottom:var(--space-3);border-bottom:2px solid var(--level-color, var(--gold-400))}.lv-module-header__title{font-family:var(--font-display);font-size:var(--text-xl);font-weight:700;color:var(--text-primary);margin:0}.lv-module-header__level{font-size:var(--text-sm);color:var(--text-muted);margin:4px 0 0}.lv-module-header__system{font-weight:600;text-transform:capitalize}.lv-module-header__system[data-system=propulsion]{color:var(--sys-propulsion)}.lv-module-header__system[data-system=electronics]{color:var(--sys-electronics)}.lv-module-header__system[data-system=power]{color:var(--sys-power)}.lv-module-header__system[data-system=comms]{color:var(--sys-comms)}.lv-lessons{display:flex;flex-direction:column;gap:var(--space-3);margin-bottom:var(--space-6)}.lv-lesson{background:var(--bg-secondary);border:1px solid var(--border-default);border-radius:var(--radius-md);overflow:hidden;transition:border-color var(--transition-fast)}.lv-lesson--active{border-color:var(--gold-500)}.lv-lesson__header{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-5) 2rem;background:none;border:none;width:100%;text-align:left;cursor:pointer;color:inherit;transition:background var(--transition-fast)}.lv-lesson__header:hover{background:var(--bg-hover)}.lv-lesson__status{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--bg-tertiary);color:var(--text-muted);font-family:var(--font-mono);font-size:var(--text-sm);font-weight:600;flex-shrink:0}.lv-lesson__status--done{background:var(--status-success);color:var(--bg-primary)}.lv-lesson__info{flex:1;min-width:0;display:flex;align-items:center;gap:var(--space-3)}.lv-lesson__title{font-family:var(--font-display);font-size:var(--text-base);font-weight:600;color:var(--text-primary);margin:0;flex:1}.lv-lesson__duration{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-muted);flex-shrink:0}.lv-lesson__activity-badge{font-size:var(--text-xs);margin-left:var(--space-2)}.lv-lesson__activity-badge--done{opacity:.7}.lv-lesson__content{padding:var(--space-6) 2rem var(--space-8);border-top:1px solid var(--border-default);animation:lv-slide-in .2s ease}@keyframes lv-slide-in{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.lv-lesson__summary{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.7;margin:0 0 var(--space-5);font-style:italic}.lv-lesson__section{margin-bottom:var(--space-2)}.lv-lesson__section-heading{font-family:var(--font-display);font-size:var(--text-base);font-weight:700;color:var(--text-primary);margin:var(--space-6) 0 var(--space-1)}.lv-lesson__section:first-child .lv-lesson__section-heading{margin-top:0}.lv-lesson__section-text{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.8}.lv-lesson__placeholder{font-size:var(--text-sm);color:var(--text-muted);font-style:italic;padding:var(--space-4) 0}.lv-lesson__complete-area{margin-top:var(--space-6);padding-top:var(--space-5);border-top:1px solid var(--border-default)}.lv-lesson__gate-msg{font-size:var(--text-xs);color:var(--gold-400);margin:0 0 var(--space-2)}.lv-lesson__complete-btn{padding:var(--space-3) var(--space-6);background:var(--gold-500);color:var(--bg-primary);border:none;border-radius:var(--radius-md);font-family:var(--font-display);font-size:var(--text-sm);font-weight:700;cursor:pointer;transition:background var(--transition-fast)}.lv-lesson__complete-btn:hover:not(:disabled){background:var(--gold-400)}.lv-lesson__complete-btn:disabled{opacity:.4;cursor:not-allowed}.lv-lesson__nav-area{margin-top:var(--space-5);padding-top:var(--space-4);border-top:1px solid var(--border-default)}.lv-lesson__next-btn{padding:var(--space-3) var(--space-6);background:none;border:1px solid var(--border-default);border-radius:var(--radius-lg);color:var(--text-secondary);font-family:var(--font-display);font-size:var(--text-sm);font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.lv-lesson__next-btn:hover,.lv-lesson__next-btn--module{border-color:var(--gold-500);color:var(--gold-400)}.lv-lesson__next-btn--level{color:var(--text-muted)}.lv-lesson__next-btn--complete{background:linear-gradient(135deg,#1a3a1a,#1e4a2a);color:#4ade80;border-color:#16a34a;font-weight:700}.lv-lesson__next-btn--complete:hover{background:linear-gradient(135deg,#1e4a1e,#22543a);border-color:#22c55e;color:#86efac}.lv-module-nav{display:flex;justify-content:space-between;margin-top:var(--space-8);padding-top:var(--space-8);border-top:1px solid var(--border-default)}.lv-module-nav__btn{padding:var(--space-3) var(--space-6);background:none;border:1px solid var(--border-default);border-radius:var(--radius-lg);font-family:var(--font-display);font-size:var(--text-sm);font-weight:600;color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast)}.lv-module-nav__btn:hover{border-color:var(--gold-500);color:var(--gold-400)}.lv-module-nav__btn--next{margin-left:auto}.lv-module-nav__btn--complete{background:linear-gradient(135deg,#1a3a1a,#1e4a2a)!important;color:#4ade80!important;border-color:#16a34a!important;font-weight:700}.lv-module-nav__btn--complete:hover{background:linear-gradient(135deg,#1e4a1e,#22543a)!important;border-color:#22c55e!important;color:#86efac!important}.lv-module-card__num--done{background:#3a8f6e26;color:#3a8f6e;border:1px solid rgba(58,143,110,.3)}.lv-lesson__next-btn--done{border-color:var(--status-success);color:var(--status-success)}.lv-lesson__next-btn--done:hover{border-color:var(--status-success);color:var(--status-success);filter:brightness(1.15)}.lv-lesson__kc{margin:1rem 0;border:1px solid var(--border-subtle, #1a1d22);border-radius:6px;background:var(--bg-tertiary, #0d0f12);overflow:hidden}.lv-lesson__kc-question{padding:.75rem 1rem;cursor:pointer;color:var(--text-primary, #e0e0e8);font-size:var(--text-sm, .875rem);font-weight:500;list-style:none}.lv-lesson__kc-question::-webkit-details-marker{display:none}.lv-lesson__kc-question::marker{content:""}.lv-lesson__kc[open] .lv-lesson__kc-question{border-bottom:1px solid var(--border-subtle, #1a1d22)}.lv-lesson__kc-answer{padding:.75rem 1rem;color:var(--text-secondary, #999);font-size:var(--text-sm, .875rem);line-height:1.7}.lv-lesson__kc-explanation{margin-top:.5rem;font-style:italic;opacity:.8}.lv-lesson__key-concept{margin:.75rem 0;padding:.75rem 1rem;border-left:3px solid #D7A103;background:#d7a1030f;border-radius:0 4px 4px 0}.lv-lesson__key-concept-label{display:block;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:#d7a103;margin-bottom:.35rem}.lv-lesson__key-concept p{margin:0;color:var(--text-secondary, #999);font-size:var(--text-sm, .875rem);line-height:1.6}.lv-lesson__quiz{margin:1.5rem 0;padding:1.5rem;border:1px solid var(--border-subtle, #1a1d22);border-radius:6px;background:var(--bg-tertiary, #0d0f12)}.lv-lesson__quiz--passed{border-color:#22c55e4d;background:#14532d33}.lv-lesson__quiz--passed .lv-lesson__quiz-title{color:#86efac;margin-bottom:.5rem}.lv-lesson__quiz-title{font-size:.95rem;font-weight:600;color:var(--text-primary, #e0e0e8);margin:0 0 1.25rem}.lv-lesson__quiz-q{margin-bottom:1.75rem}.lv-lesson__quiz-question{color:var(--text-primary, #e0e0e8);font-size:var(--text-base, .95rem);line-height:1.6;margin:0 0 .75rem}.lv-lesson__quiz-options{display:flex;flex-direction:column;gap:.5rem}.lv-lesson__quiz-opt{text-align:left;padding:.75rem 1rem;border:1px solid var(--border-subtle, #1a1d22);border-radius:6px;background:var(--bg-secondary, #111318);color:var(--text-secondary, #999);font-size:var(--text-sm, .875rem);line-height:1.5;cursor:pointer;transition:border-color .15s,background .15s}.lv-lesson__quiz-opt:hover{border-color:var(--text-muted, #555);color:var(--text-primary, #e0e0e8)}.lv-lesson__quiz-opt--selected{border-color:#3b82f6;background:#3b82f614;color:var(--text-primary, #e0e0e8)}.lv-lesson__quiz-opt--correct{border-color:#55c878;background:#55c8781a;color:#55c878}.lv-lesson__quiz-opt--wrong{border-color:#e85555;background:#e8555514;color:#e85555}.lv-lesson__quiz-feedback{margin:.5rem 0 0;font-size:.8rem;line-height:1.6;padding:.5rem .75rem;border-radius:4px;background:#ffffff08}.lv-lesson__quiz-feedback--correct{color:#55c878}.lv-lesson__quiz-feedback--wrong{color:#e85555}.lv-lesson__quiz-submit{margin-top:1rem;padding:.6rem 1.5rem;border:1px solid #3b82f6;border-radius:6px;background:#3b82f61a;color:#3b82f6;font-size:var(--text-sm, .875rem);font-weight:600;cursor:pointer;transition:background .15s}.lv-lesson__quiz-submit:hover:not(:disabled){background:#3b82f62e}.lv-lesson__quiz-submit:disabled{opacity:.4;cursor:not-allowed}.lv-lesson__quiz-result{margin-top:1rem;padding:.6rem 1rem;border-radius:6px;background:#55c87814;font-weight:600;font-size:var(--text-sm, .875rem);display:flex;align-items:center;gap:.75rem}.lv-lesson__quiz-retry{padding:.3rem .85rem;border:1px solid rgba(34,197,94,.35);border-radius:4px;background:#14532d4d;color:#86efac;font-size:var(--text-sm, .875rem);font-weight:600;cursor:pointer;transition:border-color .15s,color .15s,background .15s;white-space:nowrap;flex-shrink:0}.lv-lesson__quiz-retry:hover{border-color:#22c55e99;color:#4ade80;background:#14532d80}.lv-lightbox{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000e0;z-index:9999;display:flex;align-items:center;justify-content:center;padding:1rem;cursor:zoom-out}.lv-lightbox__inner{position:relative;width:95vw;max-width:95vw;max-height:95vh;display:flex;flex-direction:column;align-items:center;gap:.75rem;cursor:default}.lv-lightbox__close{position:absolute;top:-2rem;right:-1rem;background:#1e1e1ee6;border:1px solid #30363d;color:#c8d6e5;font-size:.85rem;padding:4px 12px;border-radius:6px;cursor:pointer;z-index:1}.lv-lightbox__close:hover{color:#fff;border-color:#6e7681}.lv-lightbox__img{width:95vw;max-width:95vw;max-height:88vh;object-fit:contain;border-radius:6px;box-shadow:0 8px 40px #0009}.lv-lightbox__caption{color:#8b949e;font-size:.85rem;text-align:center;max-width:600px;margin:0}.lv-lesson__figure{margin:1rem 0}.lv-lesson__figure-thumb{position:relative;display:inline-block;max-width:100%;cursor:zoom-in;border-radius:6px;overflow:hidden;border:1px solid var(--border-default)}.lv-lesson__figure-img{display:block;max-width:100%;max-height:320px;width:auto;object-fit:contain;border-radius:6px}.lv-lesson__figure-zoom{position:absolute;bottom:6px;left:6px;background:#0009;color:#8b949e;font-size:.65rem;padding:2px 8px;border-radius:4px;pointer-events:none}.lv-lesson__figure-caption{font-size:.8rem;color:var(--text-muted);margin:.35rem 0 0;font-style:italic}.lv-lesson__reset-btn{display:inline-flex;align-items:center;gap:6px;margin-top:.5rem;margin-bottom:.75rem;padding:.35rem .875rem;background:transparent;border:1px solid rgba(239,68,68,.35);border-radius:6px;color:#ef4444;font-size:.82rem;cursor:pointer;transition:all .15s}.lv-lesson__reset-btn:hover{background:#ef444414;border-color:#ef4444}.return-bar{display:flex;align-items:center;justify-content:space-between;padding:.65rem 1.3rem;margin:0 0 var(--space-4);background:var(--gold-500);color:var(--bg-primary);font-size:1.105rem;box-shadow:0 2px 8px #0000004d;border-radius:var(--radius-md)}.return-bar--verified{background:var(--status-success)}.return-bar__info{display:flex;align-items:center;gap:.65rem}.return-bar__label{font-weight:400;opacity:.85}.return-bar__name{font-weight:700}.return-bar__status{font-size:.975rem;font-weight:700;background:#fff3;padding:2px 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var(--space-4);padding:var(--space-2) var(--space-4);background:#c9a95d0a;border:1px solid rgba(201,169,93,.15);border-left:4px solid var(--gold-400);border-radius:var(--radius-md);color:var(--text-secondary);font-size:var(--text-sm);cursor:pointer;width:100%;text-align:left}.activity-banner--collapsed:hover{background:#c9a95d14;border-color:#c9a95d4d}.activity-banner__header{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-3)}.activity-banner__icon{font-size:var(--text-xl);flex-shrink:0}.activity-banner__meta{flex:1;display:flex;flex-direction:column;gap:2px}.activity-banner__tool{font-size:var(--text-xs);color:var(--gold-400);text-transform:uppercase;letter-spacing:.08em;font-weight:600;font-family:var(--font-display)}.activity-banner__title{font-size:var(--text-base);font-weight:600;color:var(--text-primary)}.activity-banner__label-short{flex:1;font-weight:500;color:var(--gold-300)}.activity-banner__expand{font-size:var(--text-xs);color:var(--text-muted)}.activity-banner__collapse{background:none;color:var(--text-muted);font-size:var(--text-xs);padding:var(--space-1) var(--space-2);border-radius:var(--radius-sm);cursor:pointer;flex-shrink:0}.activity-banner__collapse:hover{color:var(--text-primary);background:var(--bg-hover)}.activity-banner__prompt{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.7;margin:0}.activity-banner__verified-badge{font-size:var(--text-xs);font-weight:700;color:var(--status-success);background:#4bd4a81a;padding:2px var(--space-2);border-radius:var(--radius-sm);border:1px solid rgba(75,212,168,.25);flex-shrink:0}.activity-banner__steps{margin-bottom:var(--space-4);padding:var(--space-3) var(--space-6);background:#c9a95d0a;border-radius:var(--radius-sm);border:1px solid rgba(201,169,93,.1)}.activity-banner__steps-label{display:block;font-size:var(--text-xs);font-weight:600;color:var(--gold-400);text-transform:uppercase;letter-spacing:.06em;margin-bottom:var(--space-2);font-family:var(--font-display)}.activity-banner__step-list{margin:0;padding-left:var(--space-5);display:flex;flex-direction:column;gap:var(--space-1)}.activity-banner__step{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.6}.activity-banner__verify{padding:var(--space-3) var(--space-4) 0;border-top:1px solid rgba(201,169,93,.12)}.activity-banner__question{display:block;font-size:var(--text-sm);font-weight:600;color:var(--text-primary);margin-bottom:var(--space-3);padding:0 var(--space-2)}.activity-banner__text-input{display:flex;flex-wrap:wrap;gap:var(--space-2);align-items:center}.activity-banner__input{flex:1;min-width:150px;max-width:300px;padding:var(--space-2) var(--space-3);background:var(--bg-primary);border:1px solid var(--border-default);border-radius:var(--radius-sm);color:var(--text-primary);font-family:var(--font-mono);font-size:var(--text-sm)}.activity-banner__input:focus{outline:none;border-color:var(--gold-400);box-shadow:0 0 0 2px #d7a10326}.activity-banner__input--wrong{border-color:var(--status-error);box-shadow:0 0 0 2px #d44b4b26}.activity-banner__submit{padding:var(--space-2) var(--space-4);background:var(--gold-500);color:var(--bg-primary);border-radius:var(--radius-sm);font-family:var(--font-display);font-size:var(--text-sm);font-weight:600;cursor:pointer}.activity-banner__submit:hover{background:var(--gold-400)}.activity-banner__choices{display:flex;flex-direction:column;gap:var(--space-2);padding:0 var(--space-2)}.activity-banner__choice{text-align:left;padding:var(--space-2) var(--space-3);background:var(--bg-primary);border:1px solid var(--border-default);border-radius:var(--radius-sm);color:var(--text-secondary);font-family:var(--font-body);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-fast)}.activity-banner__choice:hover:not(:disabled){border-color:var(--gold-400);color:var(--text-primary);background:#c9a95d0f}.activity-banner__choice:disabled{cursor:default}.activity-banner__choice--correct{border-color:var(--status-success);background:#4bd4a81a;color:var(--status-success);font-weight:600}.activity-banner__choice--wrong{border-color:var(--status-error);background:#d44b4b0f;color:var(--status-error)}.activity-banner__check-confirm{margin-top:var(--space-2)}.activity-banner__check-btn{padding:var(--space-2) var(--space-4);background:var(--bg-primary);border:1px solid var(--border-default);border-radius:var(--radius-sm);color:var(--text-secondary);font-family:var(--font-display);font-size:var(--text-sm);font-weight:600;cursor:pointer}.activity-banner__check-btn:hover:not(:disabled){border-color:var(--gold-400);color:var(--gold-400)}.activity-banner__check-btn--done{border-color:var(--status-success);color:var(--status-success);background:#4bd4a80f}.activity-banner__feedback{display:block;width:100%;font-size:var(--text-xs);margin-top:var(--space-1)}.activity-banner__feedback--wrong{color:var(--status-error)}.activity-banner__success{display:flex;align-items:center;gap:var(--space-2);margin-top:var(--space-3);padding:var(--space-3) var(--space-4);background:#4bd4a814;border:1px solid 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#ddd}.purchase-success__btn--secondary:hover{border-color:#999;color:#1a1a1a}:root{--gold-100: #FFF5D6;--gold-200: #FFE89A;--gold-300: #FFD85E;--gold-400: #D4A84B;--gold-500: #B8922F;--gold-600: #9A7A1F;--black-100: #2A2A2E;--black-200: #1E1E22;--black-300: #161619;--black-400: #101013;--black-500: #0A0A0C;--sys-airframe: #D4A84B;--sys-propulsion: #E8723A;--sys-electronics: #4BA3D4;--sys-power: #D44B4B;--sys-comms: #8B6FD4;--sys-payload: #4BD4A8;--sys-software: #5ED44B;--bg-primary: #0E0E11;--bg-secondary: #161619;--bg-tertiary: #1E1E22;--bg-elevated: #252529;--bg-hover: #2A2A2E;--text-primary: #E8E4DC;--text-secondary: #D5D0C8;--text-muted: #6B6760;--text-accent: #D4A84B;--border-default: #2A2A2E;--border-subtle: #1E1E22;--border-accent: rgba(212,168,75,.3);--status-success: #4BD4A8;--status-warning: #E8C23A;--status-error: #D44B4B;--status-info: #4BA3D4;--status-locked: #4A4A50;--level-0: #9CA3AF;--level-1: #D44B4B;--level-2: #E8723A;--level-3: #D4A84B;--level-4: #4BD4A8;--level-5: 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