:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-primary-light: #3b82f6;--color-secondary: #64748b;--color-accent: #f59e0b;--color-success: #10b981;--color-warning: #f59e0b;--color-danger: #ef4444;--color-info: #06b6d4;--bg-base: #0f172a;--bg-surface: #1e293b;--bg-surface-2: #273549;--bg-surface-3: #334155;--bg-input: #1e293b;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--border-color: #334155;--border-color-focus: #2563eb;--radius-sm: 4px;--radius: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--shadow: 0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);--shadow-md: 0 4px 6px rgba(0,0,0,.3), 0 2px 4px rgba(0,0,0,.2);--shadow-lg: 0 10px 15px rgba(0,0,0,.4), 0 4px 6px rgba(0,0,0,.2);--sidebar-width: 240px;--header-height: 56px;--font: Arial, sans-serif;--transition: .15s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}body{font-family:var(--font);background:var(--bg-base);color:var(--text-primary);line-height:1.5;min-height:100vh;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}input,select,textarea{font-family:inherit}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-surface)}::-webkit-scrollbar-thumb{background:var(--bg-surface-3);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--color-secondary)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:var(--bg-surface);border-right:1px solid var(--border-color);display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:100;transition:transform var(--transition)}.main-content{margin-left:var(--sidebar-width);flex:1;display:flex;flex-direction:column;min-height:100vh}.page-header{height:var(--header-height);background:var(--bg-surface);border-bottom:1px solid var(--border-color);display:flex;align-items:center;padding:0 24px;gap:16px;position:sticky;top:0;z-index:50}.page-body{padding:24px;flex:1}.card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:20px}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.btn{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:var(--radius);font-size:14px;font-weight:500;border:1px solid transparent;transition:all var(--transition);white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-dark)}.btn-secondary{background:var(--bg-surface-3);color:var(--text-primary);border-color:var(--border-color)}.btn-secondary:hover:not(:disabled){background:var(--bg-surface-2)}.btn-danger{background:var(--color-danger);color:#fff}.btn-danger:hover:not(:disabled){background:#dc2626}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover:not(:disabled){background:var(--bg-surface-2);color:var(--text-primary)}.btn-sm{padding:5px 10px;font-size:13px}.btn-lg{padding:11px 22px;font-size:15px}.btn-icon{padding:8px}.form-group{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}.form-label{font-size:13px;font-weight:500;color:var(--text-secondary)}.form-label.required:after{content:" *";color:var(--color-danger)}.form-control{padding:9px 12px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius);color:var(--text-primary);font-size:14px;width:100%;transition:border-color var(--transition)}.form-control:focus{outline:none;border-color:var(--color-primary)}.form-control::placeholder{color:var(--text-muted)}select.form-control option{background:var(--bg-surface)}textarea.form-control{resize:vertical;min-height:80px}.table-wrapper{overflow-x:auto;border-radius:var(--radius-lg);border:1px solid var(--border-color)}table{width:100%;border-collapse:collapse;font-size:14px}thead{background:var(--bg-surface-2)}th{padding:12px 16px;text-align:left;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary);white-space:nowrap}td{padding:12px 16px;border-top:1px solid var(--border-color);vertical-align:middle}tr:hover td{background:var(--bg-surface-2)}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:var(--radius-full);font-size:12px;font-weight:500}.badge-success{background:#10b98126;color:#10b981}.badge-warning{background:#f59e0b26;color:#f59e0b}.badge-danger{background:#ef444426;color:#ef4444}.badge-info{background:#06b6d426;color:#06b6d4}.badge-secondary{background:var(--bg-surface-3);color:var(--text-secondary)}.badge-primary{background:#2563eb26;color:#60a5fa}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-xl);width:100%;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg)}.modal-sm{max-width:400px}.modal-md{max-width:560px}.modal-lg{max-width:760px}.modal-xl{max-width:1000px}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border-color)}.modal-title{font-size:17px;font-weight:600}.modal-body{padding:24px}.modal-footer{display:flex;justify-content:flex-end;gap:10px;padding:16px 24px;border-top:1px solid var(--border-color)}.sidebar-logo{display:flex;align-items:center;gap:10px;padding:16px 20px;border-bottom:1px solid var(--border-color);font-weight:700;font-size:18px;color:var(--color-primary-light)}.sidebar-nav{padding:12px 8px;flex:1;overflow-y:auto}.sidebar-section-label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);padding:8px 12px 4px}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius);font-size:14px;color:var(--text-secondary);transition:all var(--transition);margin-bottom:2px}.nav-item:hover{background:var(--bg-surface-2);color:var(--text-primary)}.nav-item.active{background:#2563eb26;color:var(--color-primary-light);font-weight:500}.sidebar-footer{padding:12px;border-top:1px solid var(--border-color)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:20px;display:flex;align-items:center;gap:16px}.stat-icon{width:48px;height:48px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;flex-shrink:0}.stat-value{font-size:28px;font-weight:700;line-height:1}.stat-label{font-size:13px;color:var(--text-secondary);margin-top:2px}.page-title{font-size:22px;font-weight:700}.page-subtitle{font-size:13px;color:var(--text-secondary);margin-top:2px}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.grid-auto{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.items-start{align-items:flex-start}.justify-between{justify-content:space-between}.justify-end{justify-content:flex-end}.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.flex-1{flex:1}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.mt-4{margin-top:16px}.text-sm{font-size:13px}.text-xs{font-size:12px}.text-muted{color:var(--text-secondary)}.font-medium{font-weight:500}.font-semibold{font-weight:600}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.color-input-wrapper{display:flex;align-items:center;gap:8px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius);padding:4px 12px 4px 4px}.color-input-wrapper input[type=color]{width:36px;height:36px;border:none;border-radius:var(--radius-sm);cursor:pointer;background:none}.color-input-wrapper input[type=text]{background:none;border:none;color:var(--text-primary);font-size:14px;flex:1;padding:4px}.color-input-wrapper input[type=text]:focus{outline:none}.toast-container{position:fixed;top:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:8px}.toast{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);min-width:280px;max-width:400px;animation:slideIn .2s ease}.toast-success{border-left:3px solid var(--color-success)}.toast-error{border-left:3px solid var(--color-danger)}.toast-warning{border-left:3px solid var(--color-warning)}.toast-info{border-left:3px solid var(--color-info)}@keyframes slideIn{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}.empty-state{text-align:center;padding:60px 20px;color:var(--text-secondary)}.empty-state-icon{font-size:48px;margin-bottom:12px;opacity:.4}.empty-state-title{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:6px}.empty-state-text{font-size:14px;margin-bottom:20px}.drag-zone{border:2px dashed var(--border-color);border-radius:var(--radius-lg);padding:40px;text-align:center;cursor:pointer;transition:all var(--transition);color:var(--text-secondary)}.drag-zone:hover,.drag-zone.drag-over{border-color:var(--color-primary);background:#2563eb0d;color:var(--text-primary)}.search-input-wrapper{position:relative}.search-input-wrapper .search-icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text-muted)}.search-input-wrapper input{padding-left:34px}.toggle-wrapper{display:flex;align-items:center;gap:10px;cursor:pointer}.toggle{position:relative;width:40px;height:22px;background:var(--bg-surface-3);border-radius:11px;transition:background var(--transition);flex-shrink:0}.toggle.on{background:var(--color-primary)}.toggle:after{content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;background:#fff;border-radius:50%;transition:transform var(--transition);box-shadow:0 1px 3px #0000004d}.toggle.on:after{transform:translate(18px)}.tabs{display:flex;gap:2px;background:var(--bg-surface-2);border-radius:var(--radius);padding:3px;margin-bottom:20px}.tab{flex:1;padding:7px 12px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;color:var(--text-secondary);background:transparent;border:none;cursor:pointer;transition:all var(--transition);text-align:center}.tab.active{background:var(--bg-surface);color:var(--text-primary);box-shadow:var(--shadow)}.tab:hover:not(.active){color:var(--text-primary)}.breadcrumb{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-secondary)}.breadcrumb-sep{color:var(--text-muted)}.breadcrumb-current{color:var(--text-primary);font-weight:500}.playlist-item-row{display:flex;align-items:center;gap:12px;padding:10px 12px;background:var(--bg-surface-2);border:1px solid var(--border-color);border-radius:var(--radius);margin-bottom:6px;cursor:grab}.playlist-item-row:active{cursor:grabbing}.content-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}.content-card{background:var(--bg-surface-2);border:2px solid transparent;border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:all var(--transition)}.content-card:hover{border-color:var(--color-primary)}.content-card.selected{border-color:var(--color-primary);background:#2563eb1a}.content-thumbnail{aspect-ratio:16/9;background:var(--bg-surface-3);display:flex;align-items:center;justify-content:center;overflow:hidden}.content-thumbnail img,.content-thumbnail video{width:100%;height:100%;object-fit:cover}.content-card-info{padding:8px}.content-card-name{font-size:12px;font-weight:500;truncate:true;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.content-card-meta{font-size:11px;color:var(--text-secondary);margin-top:2px}.screen-preview{background:#000;border-radius:var(--radius);overflow:hidden;position:relative}@media (max-width: 768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.grid-2,.grid-3{grid-template-columns:1fr}}