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var(--ds-ease)}.cmd-mode-btn:hover{color:var(--ds-ink)}.cmd-mode-btn--on{color:var(--ds-on-accent);background:var(--ds-accent);box-shadow:var(--ds-shadow-1)}.cmd-mode-btn--on:hover{color:var(--ds-on-accent);background:var(--ds-accent-hover)}.cmd-suggest{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:var(--space-2);max-width:var(--ds-content-wide);margin:0 auto;padding:0 var(--space-section-x) var(--space-3);animation:cmd-fade .22s var(--ds-ease) both}.cmd-suggest-label{font-size:var(--text-2xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ds-text-faint)}.cmd-suggest-pill{display:inline-flex;align-items:center;min-height:44px;padding:var(--space-2) var(--space-3);border-radius:var(--ds-radius-pill);background:var(--ds-surface);border:1px solid var(--ds-border-subtle);color:var(--ds-text);font-size:var(--text-xs);font-weight:600;cursor:pointer;transition:color var(--ds-dur) var(--ds-ease),border-color var(--ds-dur) var(--ds-ease),background var(--ds-dur) var(--ds-ease)}.cmd-suggest-pill:hover{color:var(--ds-accent-text);background:var(--ds-accent-bg);border-color:var(--ds-accent-border)}.cmd-filter{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-2);max-width:var(--ds-content-wide);margin:0 auto;padding:0 var(--space-section-x) var(--space-4)}.cmd-filter-btn{display:inline-flex;align-items:center;gap:var(--space-2);min-height:44px;padding:var(--space-2) var(--space-4);border-radius:var(--ds-radius-pill);background:var(--ds-surface);border:1px solid var(--ds-border);color:var(--ds-text);font-size:var(--text-xs);font-weight:600;cursor:pointer;transition:color var(--ds-dur) var(--ds-ease),border-color var(--ds-dur) var(--ds-ease),background var(--ds-dur) var(--ds-ease)}.cmd-filter-btn:hover{color:var(--ds-ink);border-color:var(--ds-border-strong)}.cmd-filter-btn--active{color:var(--ds-on-accent);background:var(--ds-accent);border-color:var(--ds-accent)}.cmd-filter-btn--beginner.cmd-filter-btn--active{background:var(--ds-success);border-color:var(--ds-success);color:var(--ds-bg)}.cmd-filter-btn--intermediate.cmd-filter-btn--active{background:var(--ds-warn);border-color:var(--ds-warn);color:var(--ds-bg)}.cmd-filter-btn--advanced.cmd-filter-btn--active{background:var(--ds-danger);border-color:var(--ds-danger);color:var(--ds-on-accent)}.cmd-filter-count{font-size:var(--text-2xs);font-feature-settings:"tnum";font-variant-numeric:tabular-nums;opacity:.75}.cat-nav{display:flex;align-items:center;gap:var(--space-3);max-width:var(--ds-content-wide);margin:0 auto;padding:var(--space-3) var(--space-section-x);position:sticky;top:var(--yc-topbar-height);z-index:40;background:var(--ds-overlay);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--ds-border-subtle)}.cat-nav-label{flex-shrink:0;font-size:var(--text-2xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ds-text-faint)}.cat-nav-track{display:flex;gap:var(--space-2);overflow-x:auto;scrollbar-width:none;padding-bottom:2px;-webkit-overflow-scrolling:touch}.cat-nav-track::-webkit-scrollbar{display:none}.cat-nav-pill{display:inline-flex;align-items:center;gap:var(--space-2);min-height:44px;padding:var(--space-2) var(--space-3);border-radius:var(--ds-radius-pill);background:var(--ds-surface);border:1px solid var(--ds-border);color:var(--ds-text-muted);font-size:var(--text-xs);font-weight:600;white-space:nowrap;cursor:pointer;transition:color var(--ds-dur) var(--ds-ease),border-color var(--ds-dur) var(--ds-ease),background var(--ds-dur) var(--ds-ease)}.cat-nav-pill:hover{border-color:var(--ds-border-strong);color:var(--ds-ink)}.cat-nav-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,var(--cat-from),var(--cat-to))}.cat-nav-icon{font-size:1em}.cat-nav-count{font-size:var(--text-2xs);color:var(--ds-text-faint);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.cat-nav-pill--active{color:var(--ds-ink);background:linear-gradient(var(--ds-surface),var(--ds-surface)) padding-box,linear-gradient(135deg,var(--cat-from),var(--cat-to)) border-box;border:1px solid transparent}.cat-nav-pill--active .cat-nav-count{color:var(--ds-text-muted)}.bento-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-gutter);max-width:var(--ds-content-wide);margin:0 auto;padding:var(--space-5) var(--space-section-x) var(--space-section-y)}.bento-grid .cat-card--wide{grid-column:span 2}.bento-grid .cat-card--full{grid-column:span 3}.cat-card{position:relative;display:flex;flex-direction:column;background:var(--ds-surface);border:1px solid var(--ds-border);border-radius:var(--ds-radius-lg);padding:var(--space-5);overflow:hidden;box-shadow:var(--ds-shadow-1);transition:border-color var(--ds-dur) var(--ds-ease),box-shadow var(--ds-dur) var(--ds-ease),transform var(--ds-dur-fast) var(--ds-ease);animation:cmd-fade-up .5s var(--ds-ease) both;scroll-margin-top:108px}.cat-card-rail{inset:0 auto 0 0;width:3px;background:linear-gradient(180deg,var(--cat-from),var(--cat-to));opacity:.7;transition:opacity var(--ds-dur) var(--ds-ease),width var(--ds-dur) var(--ds-ease)}.cat-card-aura,.cat-card-rail{position:absolute;pointer-events:none}.cat-card-aura{top:-40%;right:-30%;width:60%;height:80%;background:radial-gradient(circle,var(--cat-from),transparent 70%);opacity:.08;transition:opacity var(--ds-dur) var(--ds-ease)}.cat-card:hover{border-color:color-mix(in srgb,var(--cat-from) 45%,var(--ds-border-strong));box-shadow:var(--ds-shadow-2),0 12px 32px -12px color-mix(in srgb,var(--cat-from) 32%,transparent);transform:translateY(-3px)}.cat-card:hover .cat-card-rail{width:5px;opacity:1}.cat-card:hover .cat-card-aura{opacity:.16}@keyframes cmd-fade-up{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes cmd-fade{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.bento-grid>:first-child{animation-delay:0s}.bento-grid>:nth-child(2){animation-delay:.05s}.bento-grid>:nth-child(3){animation-delay:.1s}.bento-grid>:nth-child(4){animation-delay:.15s}.bento-grid>:nth-child(5){animation-delay:.2s}.bento-grid>:nth-child(6){animation-delay:.25s}.bento-grid>:nth-child(7){animation-delay:.3s}.bento-grid>:nth-child(8){animation-delay:.35s}.bento-grid>:nth-child(9){animation-delay:.4s}.bento-grid>:nth-child(10){animation-delay:.45s}.bento-grid>:nth-child(11){animation-delay:.5s}.cat-card-top{display:flex;align-items:flex-start;gap:var(--space-3);margin-bottom:var(--space-3)}.cat-card-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;flex-shrink:0;font-size:20px;border-radius:var(--ds-radius-md);background:linear-gradient(var(--ds-surface-sub),var(--ds-surface-sub)) padding-box,linear-gradient(135deg,var(--cat-from),var(--cat-to)) border-box;border:1px solid transparent}.cat-card-head{display:flex;flex-direction:column;gap:var(--space-1);min-width:0}.cat-card-name{font-size:var(--text-lg);font-weight:700;color:var(--ds-ink);letter-spacing:-.01em;line-height:1.2}.cat-card-stats{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-2xs);font-weight:600;color:var(--ds-text-muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.cat-card-dot{color:var(--ds-text-faint)}.cat-card-desc{font-size:var(--text-sm);color:var(--ds-text);margin:0 0 var(--space-4);line-height:1.55}.cat-card-outcomes{list-style:none;padding:0;margin:0 0 var(--space-3);display:flex;flex-direction:column;gap:var(--space-1)}.cat-card-outcomes li{font-size:var(--text-xs);color:var(--ds-text-muted);line-height:1.45;padding-left:var(--space-4);position:relative}.cat-card-outcomes li:before{content:"";position:absolute;left:0;top:6px;width:5px;height:5px;border-radius:50%;background:linear-gradient(135deg,var(--cat-from),var(--cat-to))}.cat-card-divider{display:flex;align-items:center;gap:var(--space-3);margin:var(--space-2) 0 var(--space-3);color:var(--ds-text-faint)}.cat-card-divider:after{content:"";flex:1 1;height:1px;background:var(--ds-border-subtle)}.cat-card-divider-label{font-size:var(--text-2xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase}.cat-card-list{display:flex;flex-direction:column;gap:var(--space-1)}.cat-row{position:relative;display:flex;align-items:center;gap:var(--space-3);min-height:44px;padding:var(--space-2) var(--space-3);border-radius:var(--ds-radius-md);background:var(--ds-surface);border:1px solid var(--ds-border-subtle);text-decoration:none;color:inherit;overflow:hidden;transition:border-color var(--ds-dur) var(--ds-ease),background var(--ds-dur) var(--ds-ease),transform var(--ds-dur-fast) var(--ds-ease)}.cat-row:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,color-mix(in srgb,var(--cat-from) 12%,transparent),transparent 60%);opacity:0;transition:opacity var(--ds-dur) var(--ds-ease);pointer-events:none}.cat-row:hover{background:var(--ds-surface-hover);border-color:var(--ds-border);transform:translateX(2px)}.cat-row:hover:before{opacity:1}.cat-row:focus-visible{outline:var(--ds-focus-ring);outline-offset:var(--ds-focus-ring-offset)}.cat-row-num{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;flex-shrink:0;font-size:var(--text-2xs);font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;color:var(--ds-text-muted);background:var(--ds-surface-sub);border-radius:50%;position:relative;z-index:1}.cat-row:hover .cat-row-num{color:var(--ds-ink);background:linear-gradient(var(--ds-surface-sub),var(--ds-surface-sub)) padding-box,linear-gradient(135deg,var(--cat-from),var(--cat-to)) border-box;border:1px solid transparent}.cat-row-body{display:flex;flex-direction:column;gap:2px;flex:1 1;min-width:0;position:relative;z-index:1}.cat-row-title{font-size:var(--text-sm);font-weight:600;color:var(--ds-text);line-height:1.35;transition:color var(--ds-dur) var(--ds-ease)}.cat-row:hover .cat-row-title{color:var(--ds-ink)}.cat-row-meta{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-2)}.cat-row-level{font-size:var(--text-2xs);font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:1px 6px;border-radius:var(--ds-radius-sm)}.cat-row-level--beginner{background:var(--ds-accent-subtle);color:var(--ds-success-text);background:color-mix(in srgb,var(--ds-success) 16%,transparent)}.cat-row-level--intermediate{color:var(--ds-warn-text);background:color-mix(in srgb,var(--ds-warn) 16%,transparent)}.cat-row-level--advanced{color:var(--ds-danger-text);background:color-mix(in srgb,var(--ds-danger) 16%,transparent)}.cat-row-time{font-size:var(--text-2xs);font-weight:500;color:var(--ds-text-faint);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.cat-row-start{font-size:var(--text-2xs);font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--ds-accent-text);padding:1px 6px;border-radius:var(--ds-radius-sm);background:var(--ds-accent-bg);border:1px solid var(--ds-accent-border)}.cat-row-arrow{flex-shrink:0;font-size:15px;color:var(--ds-text-faint);position:relative;z-index:1;transition:transform var(--ds-dur) var(--ds-ease),color var(--ds-dur) var(--ds-ease)}.cat-row:hover .cat-row-arrow{transform:translateX(3px);color:var(--ds-accent-text)}.cat-card-footer{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-2) var(--space-3);margin-top:auto;padding-top:var(--space-3);border-top:1px solid var(--ds-border-subtle)}.cat-card-footer-tag,.cat-card-footer-time{font-size:var(--text-2xs);font-weight:600;color:var(--ds-text-muted)}.cat-card-footer-tag{color:var(--ds-accent-text);padding:2px 8px;border-radius:var(--ds-radius-pill);background:var(--ds-accent-bg);border:1px solid var(--ds-accent-border)}.search-results{max-width:var(--ds-content-wide);margin:0 auto;padding:var(--space-3) var(--space-section-x) var(--space-section-y);display:flex;flex-direction:column;gap:var(--space-2)}.search-result-card{position:relative;display:block;text-decoration:none;color:inherit;padding:var(--space-4) var(--space-5);border-radius:var(--ds-radius-lg);background:var(--ds-surface);border:1px solid var(--ds-border);box-shadow:var(--ds-shadow-1);overflow:hidden;transition:border-color var(--ds-dur) var(--ds-ease),box-shadow var(--ds-dur) var(--ds-ease),transform var(--ds-dur-fast) var(--ds-ease)}.search-result-rail{position:absolute;inset:0 auto 0 0;width:3px;background:linear-gradient(180deg,var(--cat-from),var(--cat-to));opacity:0;transition:opacity var(--ds-dur) var(--ds-ease);pointer-events:none}.search-result-card:hover{border-color:var(--ds-border-strong);box-shadow:var(--ds-shadow-2);transform:translateY(-1px)}.search-result-card--focused .search-result-rail,.search-result-card:hover .search-result-rail{opacity:1}.search-result-card--focused{background:var(--ds-surface-hover);border-color:var(--ds-accent-border);box-shadow:var(--ds-shadow-2),0 0 0 3px var(--ds-accent-subtle)}.search-result-header{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-2);margin-bottom:var(--space-2)}.search-result-type{text-transform:uppercase;letter-spacing:.05em;flex-shrink:0}.search-result-cat,.search-result-type{font-size:var(--text-2xs)!important;padding:2px 8px!important}.search-result-title{font-size:var(--text-sm);font-weight:700;color:var(--ds-ink);line-height:1.3}.search-result-snippet{font-size:var(--text-sm);color:var(--ds-text);line-height:1.6;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.search-result-snippet mark{background:var(--ds-accent-subtle);color:var(--ds-accent-text);padding:1px 3px;border-radius:var(--ds-radius-sm);font-weight:600}.search-result-similarity{display:inline-block;margin-left:var(--space-2);font-size:var(--text-2xs);font-weight:700;color:var(--ds-accent-text);background:var(--ds-accent-bg);border:1px solid var(--ds-accent-border);padding:1px 6px;border-radius:var(--ds-radius-sm);vertical-align:middle}.search-result-lesson{margin-top:var(--space-2);font-size:var(--text-2xs);color:var(--ds-text-faint);font-weight:500}.search-loading{display:flex;flex-direction:column;gap:var(--space-2);max-width:var(--ds-content-wide);margin:0 auto;padding:var(--space-5) var(--space-section-x) var(--space-section-y)}.search-skeleton-card{padding:var(--space-4) var(--space-5);border-radius:var(--ds-radius-lg);background:var(--ds-surface);border:1px solid var(--ds-border-subtle)}.search-skeleton-header,.search-skeleton-line{border-radius:var(--ds-radius-sm);background:linear-gradient(90deg,var(--ds-surface-sub) 25%,var(--ds-surface-hover) 50%,var(--ds-surface-sub) 75%);background-size:200% 100%;animation:cmd-shimmer 1.5s ease-in-out infinite}.search-skeleton-header{height:12px;width:40%;margin-bottom:var(--space-3)}.search-skeleton-line{height:10px;width:100%;margin-bottom:var(--space-2)}.search-skeleton-line--short{width:65%}.search-skeleton-card:nth-child(2) .search-skeleton-header,.search-skeleton-card:nth-child(2) .search-skeleton-line{animation-delay:.15s}.search-skeleton-card:nth-child(3) .search-skeleton-header,.search-skeleton-card:nth-child(3) .search-skeleton-line{animation-delay:.3s}.search-skeleton-card:nth-child(4) .search-skeleton-header,.search-skeleton-card:nth-child(4) .search-skeleton-line{animation-delay:.45s}@keyframes cmd-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.no-results{padding:var(--space-8) var(--space-5);text-align:center;grid-column:1/-1}.no-results-icon{margin-bottom:var(--space-5);color:var(--ds-text-faint)}.no-results-title{font-size:var(--text-lg);font-weight:700;color:var(--ds-ink);margin-bottom:var(--space-2)}.no-results-hint{font-size:var(--text-sm);color:var(--ds-text-muted);margin-bottom:var(--space-5);max-width:420px;margin-left:auto;margin-right:auto}.no-results-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-3)}.no-results-clear,.no-results-deep{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:var(--space-2) var(--space-5);border-radius:var(--ds-radius-pill);font-size:var(--text-xs);font-weight:700;cursor:pointer;transition:background var(--ds-dur) var(--ds-ease),border-color var(--ds-dur) var(--ds-ease),color var(--ds-dur) var(--ds-ease)}.no-results-deep{color:var(--ds-on-accent);background:var(--ds-accent);border:1px solid var(--ds-accent)}.no-results-deep:hover{background:var(--ds-accent-hover)}.no-results-clear{color:var(--ds-text);background:var(--ds-surface);border:1px solid var(--ds-border)}.no-results-clear:hover{color:var(--ds-ink);border-color:var(--ds-border-strong)}.scroll-to-top{width:44px;height:44px}@media (max-width:768px){.cmd-bar{flex-wrap:wrap;padding:var(--space-2) var(--space-3)}.cmd-bar-input{order:-1;flex:1 1 100%;padding-bottom:var(--space-2)}.cmd-mode{order:2}.cmd-bar-count{order:3;margin-left:auto}.cat-nav{flex-direction:column;align-items:stretch;gap:var(--space-2)}.cat-nav-label{text-align:left}.cat-nav-track{padding-bottom:var(--space-1)}.bento-grid{grid-template-columns:repeat(2,1fr);padding:var(--space-4) var(--space-section-x) var(--space-section-y)}.bento-grid .cat-card--full,.bento-grid .cat-card--wide{grid-column:span 2}.cat-card{padding:var(--space-4)}}@media (max-width:480px){.cmd-mode{flex:1 1 100%}.cmd-mode-btn{flex:1 1}.bento-grid{grid-template-columns:1fr}.bento-grid .cat-card--full,.bento-grid .cat-card--wide{grid-column:span 1}.cmd-filter,.cmd-suggest{padding-left:var(--space-section-x);padding-right:var(--space-section-x)}}@media (prefers-reduced-motion:reduce){.cat-card,.cmd-suggest,.search-skeleton-header,.search-skeleton-line{animation:none}.cat-card,.cat-card-aura,.cat-card-rail,.cat-row,.cat-row-arrow,.cmd-bar,.cmd-mode-btn,.search-result-card{transition:none}.cat-card:hover,.cat-row:hover,.search-result-card:hover{transform:none}}.ftr{position:relative;max-width:1100px;margin:0 auto;padding:0 var(--space-section-x) var(--space-7)}.ftr-rule{height:1px;background:linear-gradient(90deg,transparent,var(--ds-border) 18%,var(--ds-border-strong) 50%,var(--ds-border) 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