*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #2563eb;--primary-hover: #1d4ed8;--secondary-color: #64748b;--success-color: #22c55e;--danger-color: #ef4444;--warning-color: #f59e0b;--background-color: #f1f5f9;--card-background: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0;--sidebar-width: 250px;--header-height: 64px}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--background-color);color:var(--text-primary);line-height:1.6}a{color:var(--primary-color);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit}input,select,textarea{font-family:inherit}.app-layout{display:flex;min-height:100vh}.main-content{flex:1;margin-left:var(--sidebar-width);padding-top:var(--header-height)}.page-content{padding:24px 24px 60px}.app-footer{padding:16px 24px;text-align:center;font-size:.75rem;color:var(--text-secondary);border-top:1px solid var(--border-color);background:var(--card-background)}.header{position:fixed;top:0;left:var(--sidebar-width);right:0;height:var(--header-height);background:var(--card-background);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 24px;z-index:100}.header-title{font-size:1.25rem;font-weight:600;color:var(--text-primary)}.header-user{display:flex;align-items:center;gap:12px}.header-user-name{font-size:.875rem;color:var(--text-secondary)}.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-width);background:var(--card-background);border-right:1px solid var(--border-color);display:flex;flex-direction:column;z-index:101}.sidebar-logo{height:var(--header-height);display:flex;align-items:center;padding:0 20px;border-bottom:1px solid var(--border-color)}.sidebar-logo 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14px;border:1px solid var(--border-color);border-radius:8px;font-size:.875rem;background:#fff;cursor:pointer}.form-select:focus{outline:none;border-color:var(--primary-color)}.form-checkbox{display:flex;align-items:center;gap:8px}.form-checkbox input{width:16px;height:16px}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}.table-container{overflow-x:auto}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border-color)}.table th{font-size:.75rem;font-weight:600;text-transform:uppercase;color:var(--text-secondary);background:var(--background-color)}.table td{font-size:.875rem}.table tbody tr:hover{background:var(--background-color)}.table-actions{display:flex;gap:8px}.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:9999px;font-size:.75rem;font-weight:500}.badge-success{background:#dcfce7;color:#166534}.badge-danger{background:#fee2e2;color:#991b1b}.badge-warning{background:#fef3c7;color:#92400e}.badge-info{background:#dbeafe;color:#1e40af}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:200}.modal{background:var(--card-background);border-radius:12px;width:100%;max-width:500px;max-height:90vh;overflow-y:auto}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:1px solid var(--border-color)}.modal-title{font-size:1.125rem;font-weight:600}.modal-close{background:none;border:none;font-size:1.5rem;color:var(--text-secondary);cursor:pointer}.modal-body{padding:24px}.modal-footer{display:flex;justify-content:flex-end;gap:12px;padding:20px 24px;border-top:1px solid var(--border-color)}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary-color) 0%,#7c3aed 100%)}.login-card{background:#fff;padding:40px;border-radius:16px;width:100%;max-width:400px;box-shadow:0 25px 50px -12px #00000040}.login-title{font-size:1.5rem;font-weight:700;text-align:center;margin-bottom:8px;color:var(--text-primary)}.login-subtitle{font-size:.875rem;text-align:center;color:var(--text-secondary);margin-bottom:32px}.login-error{background:#fee2e2;color:#991b1b;padding:12px 16px;border-radius:8px;font-size:.875rem;margin-bottom:20px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:24px}.stat-card{background:var(--card-background);border-radius:12px;border:1px solid var(--border-color);padding:20px}.stat-label{font-size:.875rem;color:var(--text-secondary);margin-bottom:8px}.stat-value{font-size:1.75rem;font-weight:700;color:var(--text-primary)}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}.video-card{background:var(--card-background);border-radius:12px;border:1px solid var(--border-color);overflow:hidden}.video-poster{width:100%;height:180px;object-fit:cover;background:var(--background-color)}.video-info{padding:16px}.video-title{font-size:1rem;font-weight:600;color:var(--text-primary);margin-bottom:8px}.video-meta{font-size:.75rem;color:var(--text-secondary);margin-bottom:12px}.video-stats{display:flex;gap:16px;font-size:.875rem;color:var(--text-secondary)}.video-stats span{display:flex;align-items:center;gap:4px}.loading{display:flex;align-items:center;justify-content:center;padding:40px}.loading-spinner{width:40px;height:40px;border:3px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:60px 20px;color:var(--text-secondary)}.empty-state-icon{font-size:3rem;margin-bottom:16px}.empty-state-title{font-size:1.125rem;font-weight:600;color:var(--text-primary);margin-bottom:8px}.empty-state-text{font-size:.875rem;margin-bottom:20px}@media (max-width: 768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.header{left:0}.form-row{grid-template-columns:1fr}}