:root{--neutral-50: #fafafa;--neutral-100: #f5f5f5;--neutral-200: #e5e5e5;--neutral-300: #d4d4d4;--neutral-400: #a3a3a3;--neutral-500: #737373;--neutral-600: #525252;--neutral-700: #404040;--neutral-800: #262626;--neutral-900: #171717;--neutral-950: #0a0a0a;--color-background: #ffffff;--color-foreground: #1a202c;--color-card: #ffffff;--color-card-foreground: #1a202c;--color-popover: #ffffff;--color-popover-foreground: #1a202c;--color-primary: #667eea;--color-primary-hover: #5a67d8;--color-primary-foreground: #ffffff;--color-secondary: #f7fafc;--color-secondary-foreground: #1a202c;--color-muted: #edf2f7;--color-muted-foreground: #718096;--color-accent: #e6fffa;--color-accent-foreground: #234e52;--color-destructive: #f56565;--color-destructive-foreground: #ffffff;--color-border: #e2e8f0;--color-input: #edf2f7;--color-ring: #667eea;--color-text: #2d3748;--color-text-inverted: #ffffff;--success: #48bb78;--success-foreground: #f0fff4;--warning: #ed8936;--warning-foreground: #fffaf0;--info: #4299e1;--info-foreground: #ebf8ff;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-2xl: 1.5rem;--radius-full: 9999px;--spacing-0: 0;--spacing-1: .25rem;--spacing-2: .5rem;--spacing-3: .75rem;--spacing-4: 1rem;--spacing-5: 1.25rem;--spacing-6: 1.5rem;--spacing-8: 2rem;--spacing-10: 2.5rem;--spacing-12: 3rem;--spacing-16: 4rem;--spacing-20: 5rem;--spacing-24: 6rem;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--font-size-4xl: 2.25rem;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--line-height-tight: 1.25;--line-height-normal: 1.5;--line-height-relaxed: 1.75;--shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, .08), 0 1px 2px 0 rgba(0, 0, 0, .06);--shadow: 0 4px 6px -1px rgba(0, 0, 0, .08), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-md: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .08), 0 10px 10px -5px rgba(0, 0, 0, .04);--shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, .1);--transition-fast: all .2s cubic-bezier(.4, 0, .2, 1);--transition-normal: all .3s cubic-bezier(.4, 0, .2, 1);--transition-slow: all .5s cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--color-background: #0f172a;--color-foreground: #f1f5f9;--color-card: #1e293b;--color-card-foreground: #f1f5f9;--color-popover: #1e293b;--color-popover-foreground: #f1f5f9;--color-primary: #818cf8;--color-primary-hover: #6366f1;--color-primary-foreground: #ffffff;--color-secondary: #334155;--color-secondary-foreground: #f1f5f9;--color-muted: #334155;--color-muted-foreground: #94a3b8;--color-accent: #0f766e;--color-accent-foreground: #ccfbf1;--color-destructive: #ef4444;--color-destructive-foreground: #ffffff;--color-border: #334155;--color-input: #334155;--color-ring: #818cf8;--color-text: #cbd5e1;--color-text-inverted: #1e293b;--shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, .3);--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3);--shadow-md: 0 10px 15px -3px rgba(0, 0, 0, .3);--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .3);--shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, .4)}*{box-sizing:border-box}body{background-color:var(--color-background);color:var(--color-foreground);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:var(--line-height-normal);margin:0;padding:0;transition:var(--transition-fast);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--color-ring);outline-offset:2px;border-radius:var(--radius-sm)}a:focus:not(:focus-visible),button:focus:not(:focus-visible),input:focus:not(:focus-visible),textarea:focus:not(:focus-visible),select:focus:not(:focus-visible){outline:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}@media (prefers-contrast: high){a,button{text-decoration:underline}button,input,select,textarea{border:2px solid currentColor}}.site-config-manager{width:100%;max-width:75rem;margin:0 auto;padding:var(--spacing-6);display:flex;flex-direction:column;gap:var(--spacing-6);animation:fadeInUp .6s ease-out}.admin-card{background:var(--color-card);border:2px solid var(--color-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:var(--spacing-8);width:100%;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.admin-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent),var(--color-primary));transform:scaleX(0);transform-origin:left;transition:transform .3s ease}.admin-card:hover:before{transform:scaleX(1)}.admin-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-xl);border-color:#3b82f64d}[data-theme=dark] .admin-card{background:var(--color-card);border-color:var(--color-border);box-shadow:var(--shadow-lg),0 0 0 1px #ffffff0d}[data-theme=dark] .admin-card:hover{border-color:#93c5fd4d}.admin-card h3{color:var(--color-foreground);font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);margin:0 0 var(--spacing-3) 0;line-height:var(--line-height-tight);display:flex;align-items:center;gap:var(--spacing-2);background:linear-gradient(135deg,var(--color-foreground),var(--color-primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.admin-card>p{color:var(--color-muted-foreground);font-size:var(--font-size-base);line-height:var(--line-height-relaxed);margin:0 0 var(--spacing-6) 0;opacity:.9}.form-group{margin-bottom:var(--spacing-6);position:relative}.form-group label{display:block;color:var(--color-foreground);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);margin-bottom:var(--spacing-2);line-height:var(--line-height-normal);transition:color .2s ease;text-transform:uppercase;letter-spacing:.025em}.form-group:focus-within label{color:var(--color-primary)}.form-input{width:100%;padding:var(--spacing-4);border:2px solid var(--color-input);border-radius:var(--radius-lg);background-color:var(--color-background);color:var(--color-foreground);font-size:var(--font-size-base);line-height:var(--line-height-normal);transition:all .3s cubic-bezier(.4,0,.2,1);font-family:inherit;resize:vertical}.form-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #3b82f61a,0 1px 3px #0000001a;transform:translateY(-1px)}.form-input:disabled{opacity:.6;cursor:not-allowed;background-color:var(--color-muted);border-color:var(--color-muted)}.form-input::placeholder{color:var(--color-muted-foreground);opacity:.7}.form-input:hover:not(:disabled){border-color:var(--color-primary);box-shadow:0 2px 4px #0000000d}textarea.form-input{min-height:100px;line-height:1.6}.css-editor{font-family:Courier New,Consolas,Monaco,monospace;font-size:14px;line-height:1.5;tab-size:2;background-color:var(--neutral-950);color:#e0e0e0;border:2px solid var(--color-border);padding:var(--spacing-4);overflow-x:auto}[data-theme=dark] .css-editor{background-color:var(--neutral-950);border-color:var(--color-border)}.css-editor:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #3b82f626}.form-help{color:var(--color-muted-foreground);font-size:var(--font-size-sm);margin-top:var(--spacing-2);line-height:var(--line-height-relaxed);font-style:italic}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-3) var(--spacing-6);border:2px solid transparent;border-radius:var(--radius-lg);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);line-height:var(--line-height-normal);text-decoration:none;cursor:pointer;transition:all .3s 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.btn:hover{opacity:1;transform:none;background:transparent}.template-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-6);margin-top:var(--spacing-4)}.template-option{border:2px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-6);transition:all .3s cubic-bezier(.4,0,.2,1);background:var(--color-background);position:relative;overflow:hidden}.template-option:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent));opacity:0;transition:opacity .3s ease}.template-option:hover{border-color:var(--color-primary);transform:translateY(-4px);box-shadow:var(--shadow-lg)}.template-option:hover:before{opacity:1}.template-option.selected{border-color:var(--color-primary);background:linear-gradient(135deg,#3b82f60d,#93c5fd0d);box-shadow:0 0 0 3px #3b82f61a}.template-option.selected:before{opacity:1}.template-option 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#ff006e;box-shadow:0 0 10px #ff006e66,0 0 20px #00f5ff33;position:relative;z-index:1}.template-btn{width:100%;padding:var(--spacing-3) var(--spacing-4);border:2px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-background);color:var(--color-foreground);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1)}.template-btn:hover:not(:disabled){background:var(--color-primary);color:var(--color-primary-foreground);border-color:var(--color-primary);transform:translateY(-2px);box-shadow:0 4px 12px #3b82f64d}.template-btn.active{background:var(--color-primary);color:var(--color-primary-foreground);border-color:var(--color-primary);box-shadow:0 4px 12px #3b82f64d}.template-btn:disabled{opacity:.5;cursor:not-allowed}.loading-spinner{width:3rem;height:3rem;border:3px solid var(--color-muted);border-top:3px solid var(--color-primary);border-radius:var(--radius-full);animation:spin 1s linear infinite;margin:0 auto var(--spacing-4)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes shake{0%,to{transform:translate(0)}10%,30%,50%,70%,90%{transform:translate(-2px)}20%,40%,60%,80%{transform:translate(2px)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 768px){.site-config-manager{padding:var(--spacing-4)}.admin-card{padding:var(--spacing-6)}.template-grid{grid-template-columns:1fr;gap:var(--spacing-4)}.form-actions{flex-direction:column}.btn-lg{padding:var(--spacing-3) var(--spacing-6)}}@media (max-width: 640px){.site-config-manager{padding:var(--spacing-3)}.admin-card{padding:var(--spacing-5);border-radius:var(--radius-lg)}.admin-card h3{font-size:var(--font-size-xl)}.form-input{padding:var(--spacing-3)}.template-preview{height:150px}}@media (max-width: 480px){.site-config-manager{padding:var(--spacing-2)}.admin-card{padding:var(--spacing-4)}.admin-card h3{font-size:var(--font-size-lg);gap:var(--spacing-1)}.admin-card>p{font-size:var(--font-size-sm)}.css-editor{font-size:12px}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.loading-spinner,.btn:before,.admin-card:before,.template-option:before{animation:none!important}.admin-card:hover,.btn:hover,.template-option:hover,.form-input:focus{transform:none!important}}.btn:focus-visible,.form-input:focus-visible,.template-btn:focus-visible{outline:3px solid var(--color-ring);outline-offset:2px}@media (prefers-contrast: high){.admin-card,.btn,.form-input,.error-message,.success-message,.template-option{border-width:3px}.admin-card:before,.template-option:before{display:none}}@media (hover: none) and (pointer: coarse){.btn,.form-input,.template-btn{min-height:44px}.admin-card:hover,.btn:hover,.template-option:hover{transform:none}}.system-update-manager{max-width:1200px;margin:0 auto;padding:2rem}.update-header{margin-bottom:2rem;text-align:center}.update-header h2{font-size:2rem;margin-bottom:.5rem;color:var(--text-primary)}.update-subtitle{color:var(--text-secondary);font-size:1rem}.alert{padding:1rem;border-radius:8px;margin-bottom:1.5rem;display:flex;align-items:center;gap:.75rem;animation:slideIn .3s ease-out}.alert-error{background-color:#ef44441a;border:1px solid rgba(239,68,68,.3);color:#ef4444}.alert-success{background-color:#22c55e1a;border:1px solid rgba(34,197,94,.3);color:#22c55e}.alert-icon{font-size:1.25rem}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;gap:1rem}.loading-spinner{width:48px;height:48px;border:4px solid rgba(255,255,255,.1);border-top-color:var(--accent-color);border-radius:50%;animation:spin 1s linear infinite}.update-content{display:flex;flex-direction:column;gap:1.5rem}.update-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;padding:1.5rem;transition:all .3s ease}.update-card h3{font-size:1.25rem;margin-bottom:1rem;color:var(--text-primary);display:flex;align-items:center;gap:.5rem}.update-card.update-available{border-color:#f59e0b;background:linear-gradient(135deg,#f59e0b0d,#f59e0b05)}.update-card.up-to-date{border-color:#22c55e;background:linear-gradient(135deg,#22c55e0d,#22c55e05)}.version-info{display:flex;flex-direction:column;gap:.75rem}.info-row{display:flex;align-items:center;justify-content:space-between;padding:.5rem 0;border-bottom:1px solid var(--border-color)}.info-row:last-child{border-bottom:none}.info-label{font-weight:500;color:var(--text-secondary);min-width:120px}.info-value{color:var(--text-primary);font-family:Courier New,monospace;font-size:.9rem}.info-value.digest{color:var(--text-secondary);font-size:.85rem}.update-message{color:var(--text-primary);margin-bottom:1rem;padding:.75rem;background:#ffffff0d;border-radius:6px}.update-actions{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1rem}.btn{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:.5rem}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent-color);color:#fff}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.btn-secondary{background:var(--card-bg);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover:not(:disabled){background:var(--border-color)}.update-instructions{background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;padding:2rem;margin-top:1.5rem;animation:slideDown .3s ease-out}.update-instructions h3{font-size:1.5rem;margin-bottom:1rem;color:var(--text-primary)}.update-instructions h4{font-size:1.1rem;margin-bottom:.75rem;color:var(--text-primary)}.instructions-intro{color:var(--text-secondary);margin-bottom:2rem;line-height:1.6}.command-section{margin-bottom:2rem}.command-group{display:flex;flex-direction:column;gap:1.5rem}.command-item{display:flex;gap:1rem}.command-number{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--accent-color);color:#fff;border-radius:50%;font-weight:700;flex-shrink:0}.command-content{flex:1}.command-description{color:var(--text-secondary);margin-bottom:.5rem}.command-box{display:flex;align-items:center;gap:.5rem;background:#0000004d;padding:1rem;border-radius:8px;border:1px solid var(--border-color);position:relative}.command-box code{flex:1;font-family:Courier New,monospace;color:var(--accent-color);font-size:.95rem}.btn-copy{background:transparent;border:1px solid var(--border-color);padding:.5rem;border-radius:6px;cursor:pointer;font-size:1rem;transition:all .2s ease}.btn-copy:hover{background:var(--border-color);transform:scale(1.1)}.command-tabs{display:flex;flex-direction:column;gap:1rem}.tab-content{display:flex;flex-direction:column;gap:.5rem}.tab-label{font-weight:500;color:var(--text-secondary);font-size:.9rem}.warning-box{display:flex;gap:1rem;padding:1.5rem;background:#f59e0b1a;border:1px solid rgba(245,158,11,.3);border-radius:8px;margin-top:2rem}.warning-icon{font-size:1.5rem;flex-shrink:0}.warning-content{color:var(--text-primary)}.warning-content strong{display:block;margin-bottom:.5rem;color:#f59e0b}.warning-content ul{margin:0;padding-left:1.5rem;list-style-type:disc}.warning-content li{margin-bottom:.5rem;line-height:1.5}@keyframes spin{to{transform:rotate(360deg)}}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideDown{0%{opacity:0;max-height:0}to{opacity:1;max-height:2000px}}@media (max-width: 768px){.system-update-manager{padding:1rem}.update-header h2{font-size:1.5rem}.info-row{flex-direction:column;align-items:flex-start;gap:.25rem}.info-label{min-width:auto}.update-actions{flex-direction:column}.btn{width:100%;justify-content:center}.command-item{flex-direction:column}.command-box{flex-direction:column;align-items:flex-start}.btn-copy{align-self:flex-end}}.processing-status-grid{display:grid;gap:.75rem}.processing-item-layout{display:flex;flex-direction:column;gap:.75rem}.processing-header-layout{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.5rem}.progress-layout{display:flex;align-items:center;gap:1rem}.progress-text-layout{flex-shrink:0;min-width:4rem;text-align:right}.video-title-layout{flex:1;word-break:break-word;min-width:0}@media (max-width: 640px){.processing-header-layout{flex-direction:column;align-items:flex-start;gap:.5rem}.progress-layout{gap:.75rem}.progress-text-layout{min-width:3rem;font-size:.75rem}}.admin-videos-page{min-height:100vh;background:var(--color-background);padding:var(--spacing-6) var(--spacing-4)}.admin-videos-container{max-width:1400px;margin:0 auto;width:100%}.admin-videos-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-8);padding:var(--spacing-6);background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-sm)}.header-content{flex:1}.header-content h1{font-size:var(--font-size-3xl);font-weight:var(--font-weight-bold);color:var(--color-foreground);margin:0 0 var(--spacing-2) 0;display:flex;align-items:center;gap:var(--spacing-3)}.header-emoji{font-size:1.2em;filter:drop-shadow(0 2px 4px rgba(0,0,0,.1))}.header-subtitle{color:var(--color-muted-foreground);font-size:var(--font-size-base);margin:0;line-height:var(--line-height-relaxed)}.header-actions{display:flex;gap:var(--spacing-3);align-items:center}.back-link{display:inline-flex;align-items:center;gap:var(--spacing-2);padding:var(--spacing-3) var(--spacing-5);background:var(--color-secondary);color:var(--color-secondary-foreground);text-decoration:none;border-radius:var(--radius-lg);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);transition:all .2s ease;border:1px solid var(--color-border)}.back-link:hover{background:var(--color-muted);transform:translate(-2px);box-shadow:var(--shadow-sm)}.back-icon{font-size:var(--font-size-lg)}.admin-videos-content{display:grid;gap:var(--spacing-6)}.section-card{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-6);box-shadow:var(--shadow);transition:all .2s ease}.section-card:hover{box-shadow:var(--shadow-lg)}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--spacing-5);padding-bottom:var(--spacing-4);border-bottom:2px solid var(--color-border)}.section-header h2{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);color:var(--color-foreground);margin:0;display:flex;align-items:center;gap:var(--spacing-2)}.section-icon{font-size:1.1em;opacity:.8}.section-badge{display:inline-flex;align-items:center;padding:var(--spacing-1) var(--spacing-3);background:var(--color-primary);color:var(--color-primary-foreground);font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold);border-radius:var(--radius-full);box-shadow:var(--shadow-sm)}.section-description{color:var(--color-muted-foreground);font-size:var(--font-size-sm);margin:var(--spacing-2) 0 0 0;line-height:var(--line-height-relaxed)}.upload-section{border-left:4px solid var(--color-primary)}.processing-section{border-left:4px solid var(--warning)}.video-library-section{border-left:4px solid var(--success)}.video-library-header{display:flex;flex-direction:column;gap:var(--spacing-2);margin-bottom:var(--spacing-6)}.video-library-title{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--spacing-3)}.video-library-title h2{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);color:var(--color-foreground);margin:0;display:flex;align-items:center;gap:var(--spacing-2)}.video-library-stats{display:flex;gap:var(--spacing-4);align-items:center;flex-wrap:wrap}.stat-item{display:flex;align-items:center;gap:var(--spacing-2);padding:var(--spacing-2) var(--spacing-4);background:var(--color-muted);border-radius:var(--radius-lg);font-size:var(--font-size-sm);color:var(--color-muted-foreground)}.stat-value{font-weight:var(--font-weight-bold);color:var(--color-foreground)}.info-card{padding:var(--spacing-5);background:linear-gradient(135deg,var(--color-muted) 0%,var(--color-secondary) 100%);border:1px solid var(--color-border);border-radius:var(--radius-lg);margin-bottom:var(--spacing-4)}.info-card-content{display:flex;align-items:flex-start;gap:var(--spacing-4)}.info-icon{flex-shrink:0;font-size:var(--font-size-2xl);opacity:.7}.info-text{flex:1}.info-text h3{margin:0 0 var(--spacing-2) 0;font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);color:var(--color-foreground)}.info-text p{margin:0;font-size:var(--font-size-sm);color:var(--color-muted-foreground);line-height:var(--line-height-relaxed)}.content-divider{height:1px;background:linear-gradient(90deg,transparent,var(--color-border),transparent);margin:var(--spacing-8) 0}.empty-state{text-align:center;padding:var(--spacing-12) var(--spacing-6);color:var(--color-muted-foreground)}.empty-state-icon{font-size:var(--font-size-4xl);margin-bottom:var(--spacing-4);opacity:.3}.empty-state h3{font-size:var(--font-size-xl);font-weight:var(--font-weight-semibold);color:var(--color-foreground);margin:0 0 var(--spacing-2) 0}.empty-state p{font-size:var(--font-size-base);margin:0}@media (max-width: 768px){.admin-videos-page{padding:var(--spacing-4) var(--spacing-3)}.admin-videos-header{flex-direction:column;align-items:flex-start;gap:var(--spacing-4);padding:var(--spacing-5)}.header-content h1{font-size:var(--font-size-2xl)}.header-actions{width:100%}.back-link{width:100%;justify-content:center}.section-card{padding:var(--spacing-5)}.section-header{flex-direction:column;align-items:flex-start;gap:var(--spacing-2)}.section-header h2{font-size:var(--font-size-xl)}.video-library-title{flex-direction:column;align-items:flex-start}.video-library-stats{width:100%}.stat-item{flex:1;justify-content:center}}@media (max-width: 480px){.admin-videos-page{padding:var(--spacing-3) var(--spacing-2)}.admin-videos-header{padding:var(--spacing-4);margin-bottom:var(--spacing-6)}.header-content h1{font-size:var(--font-size-xl);gap:var(--spacing-2)}.header-emoji{font-size:1em}.section-card{padding:var(--spacing-4);border-radius:var(--radius-lg)}.section-header{margin-bottom:var(--spacing-4);padding-bottom:var(--spacing-3)}.section-header h2{font-size:var(--font-size-lg)}.info-card{padding:var(--spacing-4)}.info-card-content{gap:var(--spacing-3)}.info-icon{font-size:var(--font-size-xl)}.video-library-stats{flex-direction:column;gap:var(--spacing-2)}.stat-item{width:100%}}[data-theme=dark] .admin-videos-header{background:var(--color-card);border-color:var(--color-border);box-shadow:var(--shadow-md)}[data-theme=dark] .section-card{background:var(--color-card);border-color:var(--color-border)}[data-theme=dark] .info-card{background:linear-gradient(135deg,var(--color-muted) 0%,rgba(59,130,246,.1) 100%);border-color:var(--color-border)}[data-theme=dark] .back-link{background:var(--color-secondary);border-color:var(--color-border)}[data-theme=dark] .back-link:hover{background:var(--color-muted)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.section-card{animation:fadeIn .3s ease forwards}.section-card:nth-child(1){animation-delay:.1s}.section-card:nth-child(2){animation-delay:.2s}.section-card:nth-child(3){animation-delay:.3s}.loading-shimmer{background:linear-gradient(90deg,var(--color-muted) 0%,var(--color-border) 50%,var(--color-muted) 100%);background-size:200% 100%;animation:shimmer 1.5s infinite}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}