:root{--color-primary: #1f2937;--color-primary-hover: #111827;--color-secondary: #374151;--color-accent: #6b7280;--color-bg: #ffffff;--color-bg-secondary: #f9fafb;--color-bg-tertiary: #f3f4f6;--color-text: #111827;--color-text-secondary: #4b5563;--color-text-muted: #9ca3af;--color-border: #e5e7eb;--color-border-hover: #d1d5db;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--spacing-3xl: 4rem;--spacing-4xl: 6rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: 1rem;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .3s ease;--font-sans: "Inter", "Noto Sans JP", system-ui, -apple-system, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--container-max: 1200px;--container-narrow: 800px;--container-wide: 1400px}[data-theme=dark]{--color-primary: #e5e7eb;--color-primary-hover: #f3f4f6;--color-secondary: #d1d5db;--color-accent: #9ca3af;--color-bg: #111827;--color-bg-secondary: #1f2937;--color-bg-tertiary: #374151;--color-text: #f9fafb;--color-text-secondary: #d1d5db;--color-text-muted: #6b7280;--color-border: #374151;--color-border-hover: #4b5563;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .3);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .4), 0 2px 4px -2px rgb(0 0 0 / .3);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .4), 0 4px 6px -4px rgb(0 0 0 / .3)}[data-theme=dark] .header__logo-img,[data-theme=dark] .hero__logo{filter:brightness(0) invert(1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text);line-height:1.6;min-height:100vh;transition:background-color var(--transition-normal),color var(--transition-normal);overflow-x:hidden}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-hover)}img{max-width:100%;height:auto;display:block}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:var(--color-text)}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}p{color:var(--color-text-secondary)}.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 var(--spacing-lg)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-sm) var(--spacing-lg);font-size:1rem;font-weight:500;border-radius:var(--radius-md);border:none;cursor:pointer;transition:all var(--transition-fast)}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover{background-color:var(--color-primary-hover)}.btn-secondary{background-color:var(--color-bg-tertiary);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover{background-color:var(--color-bg-secondary);border-color:var(--color-border-hover)}[data-theme=dark] .btn-primary{background-color:#e5e7eb;color:#111827}[data-theme=dark] .btn-primary:hover{background-color:#f3f4f6}[data-theme=dark] .btn-secondary{background-color:#374151;color:#f9fafb;border-color:#4b5563}[data-theme=dark] .btn-secondary:hover{background-color:#4b5563}.card{background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-xl);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition-fast),border-color var(--transition-fast)}.card:hover{box-shadow:var(--shadow-md);border-color:var(--color-border-hover)}.section{padding:var(--spacing-2xl) 0}.section-title{margin-bottom:var(--spacing-xl);text-align:center}.text-center{text-align:center}.text-muted{color:var(--color-text-muted)}.mt-lg{margin-top:var(--spacing-lg)}.mb-lg{margin-bottom:var(--spacing-lg)}.grid{display:grid;gap:var(--spacing-lg)}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.lecture-detail{display:grid;grid-template-columns:1fr 300px;gap:var(--spacing-xl);margin-top:var(--spacing-lg)}.lecture-detail-main,.lecture-detail-container{display:flex;flex-direction:column;gap:var(--spacing-md)}.slide-viewer{background-color:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-xl);min-height:500px;display:flex;flex-direction:column;position:relative}.slide-content{flex:1;overflow-y:auto;padding-right:var(--spacing-sm)}.slide-markdown{font-size:1rem;line-height:1.8;color:var(--color-text)}.slide-markdown h1,.slide-markdown h2,.slide-markdown h3,.slide-markdown h4,.slide-markdown h5,.slide-markdown h6{margin-top:var(--spacing-lg);margin-bottom:var(--spacing-md);font-weight:600}.slide-markdown h1{font-size:1.75rem}.slide-markdown h2{font-size:1.5rem}.slide-markdown h3{font-size:1.25rem}.slide-markdown p{margin-bottom:var(--spacing-md)}.slide-markdown ul,.slide-markdown ol{margin-left:var(--spacing-lg);margin-bottom:var(--spacing-md)}.slide-markdown li{margin-bottom:var(--spacing-sm)}.slide-markdown code{background-color:var(--color-bg-tertiary);padding:.2em .4em;border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:.9em;color:var(--color-text)}.slide-markdown pre{background-color:var(--color-bg-tertiary);padding:var(--spacing-md);border-radius:var(--radius-md);overflow-x:auto;margin-bottom:var(--spacing-md)}.slide-markdown pre code{background-color:transparent;padding:0}.slide-markdown blockquote{border-left:4px solid var(--color-border);padding-left:var(--spacing-md);margin:var(--spacing-md) 0;color:var(--color-text-muted)}.slide-markdown table{width:100%;border-collapse:collapse;margin:var(--spacing-md) 0}.slide-markdown th,.slide-markdown td{padding:var(--spacing-sm);border:1px solid var(--color-border);text-align:left}.slide-markdown th{background-color:var(--color-bg-tertiary);font-weight:600}.slide-counter{display:flex;align-items:center;justify-content:center;gap:var(--spacing-sm);margin-top:var(--spacing-lg);font-size:.875rem;color:var(--color-text-muted)}.counter-separator{opacity:.6}.slide-navigation{background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden}.navigation-controls{display:flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);flex-wrap:wrap}.nav-button{display:flex;align-items:center;justify-content:center;width:40px;height:40px;padding:0;border:1px solid var(--color-border);background-color:var(--color-bg);color:var(--color-text);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast)}.nav-button:hover:not(:disabled){background-color:var(--color-bg-secondary);border-color:var(--color-border-hover);color:var(--color-primary)}.nav-button:disabled{opacity:.5;cursor:not-allowed}.navigation-info{display:flex;align-items:center;gap:var(--spacing-xs);font-size:1rem;font-weight:600;color:var(--color-text);min-width:80px;justify-content:center}.current-slide{color:var(--color-primary);min-width:30px;text-align:right}.slide-separator{color:var(--color-text-muted)}.total-slides{color:var(--color-text-muted);min-width:30px;text-align:left}.nav-jump{margin-left:auto}.jump-form{display:flex;gap:var(--spacing-sm);align-items:center}.jump-input{width:80px;padding:var(--spacing-sm);border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-bg);color:var(--color-text);font-size:.875rem}.jump-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 2px #1f29371a}.jump-submit,.jump-cancel{display:flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border:1px solid var(--color-border);background-color:var(--color-bg);color:var(--color-text);border-radius:var(--radius-md);cursor:pointer;font-size:.875rem;font-weight:600;transition:all var(--transition-fast)}.jump-submit:hover,.jump-cancel:hover{background-color:var(--color-bg-secondary);border-color:var(--color-border-hover)}.navigation-progress{height:3px;background-color:var(--color-border);position:relative;overflow:hidden}.progress-bar{height:100%;background-color:var(--color-primary);transition:width 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var(--transition-fast);font-size:.75rem;font-weight:600;color:var(--color-text-muted);padding:0}.slide-thumbnail:hover{background-color:var(--color-bg-tertiary);border-color:var(--color-border-hover)}.slide-thumbnail.active{background-color:var(--color-primary);border-color:var(--color-primary);color:#fff}.slide-number{width:100%;height:100%;display:flex;align-items:center;justify-content:center}.narration-panel{background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-md);margin-bottom:var(--spacing-md)}.narration-header{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm)}.narration-header h3{font-size:.875rem;font-weight:600;text-transform:uppercase;margin:0;color:var(--color-text-muted);letter-spacing:.5px}.audio-play-button{display:flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;border:1px solid var(--color-border);background-color:var(--color-bg-secondary);color:var(--color-primary);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);flex-shrink:0}.audio-play-button:hover{background-color:var(--color-bg-tertiary);border-color:var(--color-border-hover)}.audio-play-button:active{transform:scale(.95)}.narration-content{background-color:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-md);max-height:400px;overflow-y:auto;font-size:.95rem;line-height:1.6;color:var(--color-text)}.narration-content p{margin:0;color:var(--color-text)}.narration-content p+p{margin-top:var(--spacing-md)}.slide-markdown .mermaid{display:flex;justify-content:center;margin:var(--spacing-lg) 0;padding:var(--spacing-lg);background-color:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-md);overflow-x:auto}.lecture-detail-error{background-color:var(--color-bg-tertiary);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-2xl);text-align:center;color:var(--color-text-muted)}@media (max-width: 1024px){.lecture-detail{grid-template-columns:1fr 260px;gap:var(--spacing-lg)}.slide-viewer{min-height:400px;padding:var(--spacing-lg)}.container{padding:0 var(--spacing-md)}}@media (max-width: 768px){.container{padding:0 var(--spacing-md);max-width:100%;overflow-x:hidden}.lecture-detail{grid-template-columns:1fr;gap:var(--spacing-md);max-width:100%;overflow-x:hidden}.lecture-detail-main{order:1;max-width:100%;overflow-x:hidden;gap:var(--spacing-sm)}.lecture-detail-sidebar{order:2;position:static;height:auto;max-width:100%;overflow-x:hidden}.slides-overview{max-height:none;max-width:100%;padding:var(--spacing-md)}.slide-viewer{min-height:320px;padding:var(--spacing-md)}.navigation-controls{gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm)}.nav-button{width:36px;height:36px}.navigation-info{font-size:.9rem;min-width:70px}.slides-list{grid-template-columns:repeat(6,1fr)}.jump-form{width:100%;order:-1}.jump-input{flex:1}.narration-panel{max-height:none;padding:var(--spacing-sm)}.narration-content{max-height:180px}.grid-2,.grid-3{grid-template-columns:1fr}h1{font-size:1.75rem}h2{font-size:1.375rem}h3{font-size:1.125rem}.slide-markdown h1{font-size:1.5rem}.slide-markdown h2{font-size:1.25rem}.slide-markdown h3{font-size:1.125rem}}@media (max-width: 480px){.container{padding:0 var(--spacing-sm);max-width:100%}.slide-viewer{min-height:260px;padding:var(--spacing-sm);max-width:100%}.slides-overview{padding:var(--spacing-sm)}.slides-list{grid-template-columns:repeat(5,1fr);gap:var(--spacing-xs)}.slide-thumbnail{font-size:.625rem}.navigation-controls{padding:var(--spacing-xs) var(--spacing-sm)}.nav-button{width:32px;height:32px}.navigation-info{font-size:.8rem;min-width:60px}h1{font-size:1.5rem}h2{font-size:1.25rem}h3{font-size:1rem}.slide-markdown{font-size:.9rem}.slide-markdown h1{font-size:1.25rem}.slide-markdown h2{font-size:1.125rem}.narration-content{font-size:.875rem;max-height:140px}}.slide-search{margin-bottom:var(--spacing-lg)}.search-input-wrapper{position:relative}.search-input-container{display:flex;align-items:center;gap:var(--spacing-sm);background-color:var(--color-bg);border:1px solid 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var(--spacing-md);font-size:.875rem;color:var(--color-text-muted);border-bottom:1px solid var(--color-border)}.search-no-results{padding:var(--spacing-lg) var(--spacing-md);text-align:center;color:var(--color-text-muted)}.search-result-list{list-style:none;padding:0;margin:0}.search-result-item{border-bottom:1px solid var(--color-border)}.search-result-item:last-child{border-bottom:none}.search-result-button{width:100%;background:none;border:none;padding:var(--spacing-md);text-align:left;cursor:pointer;color:var(--color-text);font-size:.95rem;transition:background-color .15s ease}.search-result-item.selected .search-result-button,.search-result-button:hover{background-color:var(--color-bg-tertiary)}.search-result-item.current .search-result-button{background-color:var(--color-accent-subtle, rgba(59, 130, 246, .1));border-left:3px solid var(--color-accent, #3b82f6);padding-left:calc(var(--spacing-md) - 3px)}.result-slide-number{display:block;font-size:.8rem;font-weight:600;color:var(--color-text-muted);margin-bottom:2px}.result-preview{display:block;color:var(--color-text);font-size:.9rem;line-height:1.4;word-break:break-word}.slide-toc{background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;height:100%}.toc-header{padding:var(--spacing-md);border-bottom:1px solid var(--color-border);flex-shrink:0}.toc-toggle{background:none;border:none;color:var(--color-text);font-size:.95rem;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:var(--spacing-sm);width:100%;padding:0}.toc-toggle:hover{color:var(--color-accent, #3b82f6)}.toc-title{flex:1}.toc-content{flex:1;overflow-y:auto;padding:var(--spacing-md) 0}.toc-empty{padding:var(--spacing-md);color:var(--color-text-muted);font-size:.875rem;text-align:center;margin:0}.toc-list{list-style:none;padding:0;margin:0}.toc-item{margin:0}.toc-link{display:block;background:none;border:none;width:100%;text-align:left;cursor:pointer;padding:6px var(--spacing-md);color:var(--color-text);font-size:.9rem;transition:background-color .15s ease;display:flex;align-items:flex-start;justify-content:space-between;gap:var(--spacing-sm)}.toc-link:hover{background-color:var(--color-bg-tertiary)}.toc-item.active .toc-link{background-color:var(--color-accent-subtle, rgba(59, 130, 246, .1));color:var(--color-accent, #3b82f6);font-weight:600}.toc-item-text{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.toc-item-slide{flex-shrink:0;font-size:.85rem;color:var(--color-text-muted);font-weight:400}.audio-player{display:flex;flex-direction:column;gap:var(--spacing-md)}.audio-player--empty{text-align:center;padding:var(--spacing-md)}.audio-player__message{color:var(--color-text-muted);font-size:.875rem;margin:0}.audio-player__error{color:#dc2626;font-size:.875rem;padding:var(--spacing-sm);background-color:#dc26261a;border-radius:var(--radius-md)}.audio-player__loading{display:flex;align-items:center;justify-content:center;padding:var(--spacing-sm)}.audio-player__loading-text{font-size:.875rem;color:var(--color-text-muted)}.audio-player__main{display:flex;align-items:center;gap:var(--spacing-md)}.audio-player__play-btn{flex-shrink:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;background-color:var(--color-primary);color:#fff;border:none;cursor:pointer;transition:background-color var(--transition-fast)}.audio-player__play-btn:hover:not(:disabled){background-color:var(--color-primary-hover)}.audio-player__play-btn:disabled{opacity:.5;cursor:not-allowed}.audio-player__progress{flex:1;display:flex;align-items:center;gap:var(--spacing-sm)}.audio-player__time{font-size:.75rem;color:var(--color-text-muted);white-space:nowrap;min-width:2.5rem}.audio-player__slider{flex:1;height:6px;background-color:var(--color-border);border-radius:3px;appearance:none;cursor:pointer}.audio-player__slider::-webkit-slider-thumb{appearance:none;width:14px;height:14px;background-color:var(--color-primary);border-radius:50%;cursor:pointer}.audio-player__slider::-moz-range-thumb{width:14px;height:14px;background-color:var(--color-primary);border-radius:50%;border:none;cursor:pointer}.audio-player__controls{display:flex;align-items:center;justify-content:flex-start;gap:var(--spacing-md)}.audio-player__controls-group{display:flex;align-items:center;gap:var(--spacing-xs)}.audio-player__label{font-size:.75rem;color:var(--color-text-muted)}.audio-player__select{font-size:.75rem;background-color:var(--color-bg-tertiary);color:var(--color-text);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:var(--spacing-xs) var(--spacing-sm);cursor:pointer}.audio-player__auto-btn{font-size:.75rem;padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);border:1px solid var(--color-border);background-color:var(--color-bg-tertiary);color:var(--color-text);cursor:pointer;transition:all var(--transition-fast)}.audio-player__auto-btn:hover{background-color:var(--color-bg-secondary)}.audio-player__auto-btn--active{background-color:var(--color-primary);color:#fff;border-color:var(--color-primary)}.audio-player__hint{font-size:.75rem;color:var(--color-text-muted);text-align:center}.page-content{display:none;opacity:0}.page-content.visible{display:block;animation:contentFadeIn .3s ease-out forwards}@keyframes contentFadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.theme-toggle[data-astro-cid-dz5h74bc]{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-bg);cursor:pointer;transition:all var(--transition-fast)}.theme-toggle[data-astro-cid-dz5h74bc]:hover{background-color:var(--color-bg-secondary);border-color:var(--color-border-hover)}.theme-toggle__icon[data-astro-cid-dz5h74bc]{color:var(--color-text-secondary)}.theme-toggle__icon--dark[data-astro-cid-dz5h74bc],[data-theme=dark] .theme-toggle__icon--light[data-astro-cid-dz5h74bc]{display:none}[data-theme=dark] .theme-toggle__icon--dark[data-astro-cid-dz5h74bc]{display:block}.lang-switcher[data-astro-cid-a2mxz4y6]{display:flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 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