:root{--primary-color: #667eea;--secondary-color: #764ba2;--success-color: #28a745;--danger-color: #dc3545;--warning-color: #ffc107;--info-color: #17a2b8;--light-color: #f8f9fa;--dark-color: #343a40;--white: #ffffff;--gray-100: #f8f9fa;--gray-200: #e9ecef;--gray-300: #dee2e6;--gray-400: #ced4da;--gray-500: #adb5bd;--gray-600: #6c757d;--gray-700: #495057;--gray-800: #343a40;--gray-900: #212529;--font-family-base: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--border-radius: .5rem;--border-radius-sm: .25rem;--border-radius-lg: .75rem;--box-shadow: 0 .125rem .25rem rgba(0, 0, 0, .075);--box-shadow-sm: 0 .125rem .25rem rgba(0, 0, 0, .075);--box-shadow-lg: 0 .5rem 1rem rgba(0, 0, 0, .15);--header-height: 70px;--sidebar-width: 280px;--sidebar-collapsed-width: 70px}body{margin:0;padding:0;font-family:var(--font-family-base);font-size:var(--font-size-base);line-height:1.6;color:var(--gray-800);background-color:var(--gray-100);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-width:320px;min-height:100vh;width:100%;overflow-x:hidden}#root{width:100%;min-height:100vh}button{font-family:inherit;cursor:pointer}:root{--primary-color: #667eea;--secondary-color: #764ba2;--success-color: #28a745;--danger-color: #dc3545;--warning-color: #ffc107;--info-color: #17a2b8;--light-color: #f8f9fa;--dark-color: #343a40;--white: #ffffff;--gray-100: #f8f9fa;--gray-200: #e9ecef;--gray-300: #dee2e6;--gray-400: #ced4da;--gray-500: #adb5bd;--gray-600: #6c757d;--gray-700: #495057;--gray-800: #343a40;--gray-900: #212529;--font-family-base: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--border-radius: .5rem;--border-radius-sm: .25rem;--border-radius-lg: .75rem;--box-shadow: 0 .125rem .25rem rgba(0, 0, 0, .075);--box-shadow-sm: 0 .125rem .25rem rgba(0, 0, 0, .075);--box-shadow-lg: 0 .5rem 1rem rgba(0, 0, 0, .15);--header-height: 70px;--sidebar-width: 280px}.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:var(--white);border-bottom:1px solid var(--gray-200);box-shadow:var(--box-shadow-sm);z-index:1000}.header__container{display:flex;align-items:center;justify-content:space-between;height:100%;padding:0 var(--spacing-lg)}.header__left{display:flex;align-items:center;gap:var(--spacing-lg)}.header__menu-toggle{display:block;background:none;border:none;cursor:pointer;padding:var(--spacing-sm);border-radius:var(--border-radius-sm);transition:background-color .2s 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var(--gray-200);padding-top:var(--spacing-lg)}.sidebar__section-title{font-size:var(--font-size-sm);font-weight:600;color:var(--gray-500);text-transform:uppercase;letter-spacing:.05em;margin:0 0 var(--spacing-md) 0;padding:0 var(--spacing-lg)}.sidebar__menu{list-style:none;margin:0;padding:0}.sidebar__menu-item{margin-bottom:var(--spacing-xs)}.sidebar__menu-link{display:flex;align-items:center;width:100%;padding:var(--spacing-md) var(--spacing-lg);border:none;background:none;text-align:left;cursor:pointer;transition:all .2s ease;border-radius:0;position:relative}.sidebar--collapsed 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768px){.sidebar{width:100%;max-width:320px}.sidebar__overlay{display:block}.sidebar__menu-description{display:none}.sidebar__user-card{flex-direction:column;text-align:center;gap:var(--spacing-sm)}.sidebar__user-info{align-items:center}}.sidebar::-webkit-scrollbar{width:6px}.sidebar::-webkit-scrollbar-track{background:var(--gray-100)}.sidebar::-webkit-scrollbar-thumb{background:var(--gray-400);border-radius:3px}.sidebar::-webkit-scrollbar-thumb:hover{background:var(--gray-500)}.footer{background:#2c3e50;color:#fff;margin-top:auto}.footer-content{max-width:1200px;margin:0 auto;padding:40px 20px;display:grid;grid-template-columns:1fr 1fr 1fr;gap:40px}.footer-section h3{color:#f90;margin-bottom:15px;font-size:24px}.footer-section h4{color:#ecf0f1;margin-bottom:15px;font-size:18px}.footer-section p{color:#bdc3c7;line-height:1.6;margin-bottom:10px}.footer-section ul{list-style:none;padding:0}.footer-section ul li{margin-bottom:8px}.footer-section ul li 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3px #667eea40}.btn:disabled{opacity:.6;cursor:not-allowed}.btn--sm{padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-sm);line-height:1.4}.btn--md{padding:var(--spacing-md) var(--spacing-lg);font-size:var(--font-size-base);line-height:1.5}.btn--lg{padding:var(--spacing-lg) var(--spacing-xl);font-size:var(--font-size-lg);line-height:1.5}.btn--primary{color:var(--white);background-color:var(--primary-color);border-color:var(--primary-color)}.btn--primary:hover:not(:disabled){background-color:#5a6fd8;border-color:#5a6fd8;transform:translateY(-1px)}.btn--secondary{color:var(--white);background-color:var(--secondary-color);border-color:var(--secondary-color)}.btn--secondary:hover:not(:disabled){background-color:#6c4298;border-color:#6c4298;transform:translateY(-1px)}.btn--success{color:var(--white);background-color:var(--success-color);border-color:var(--success-color)}.btn--success:hover:not(:disabled){background-color:#218838;border-color:#218838;transform:translateY(-1px)}.btn--danger{color:var(--white);background-color:var(--danger-color);border-color:var(--danger-color)}.btn--danger:hover:not(:disabled){background-color:#c82333;border-color:#c82333;transform:translateY(-1px)}.btn--warning{color:var(--dark-color);background-color:var(--warning-color);border-color:var(--warning-color)}.btn--warning:hover:not(:disabled){background-color:#e0a800;border-color:#e0a800;transform:translateY(-1px)}.btn--info{color:var(--white);background-color:var(--info-color);border-color:var(--info-color)}.btn--info:hover:not(:disabled){background-color:#138496;border-color:#138496;transform:translateY(-1px)}.btn--light{color:var(--dark-color);background-color:var(--light-color);border-color:var(--light-color)}.btn--light:hover:not(:disabled){background-color:#e2e6ea;border-color:#e2e6ea;transform:translateY(-1px)}.btn--dark{color:var(--white);background-color:var(--dark-color);border-color:var(--dark-color)}.btn--dark:hover:not(:disabled){background-color:#23272b;border-color:#23272b;transform:translateY(-1px)}.btn--outline-primary{color:var(--primary-color);background-color:transparent;border-color:var(--primary-color)}.btn--outline-primary:hover:not(:disabled){color:var(--white);background-color:var(--primary-color);transform:translateY(-1px)}.btn--outline-secondary{color:var(--secondary-color);background-color:transparent;border-color:var(--secondary-color)}.btn--outline-secondary:hover:not(:disabled){color:var(--white);background-color:var(--secondary-color);transform:translateY(-1px)}.btn--full-width{width:100%}.btn--loading{color:transparent}.btn__spinner{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.btn__spinner-icon{display:inline-block;width:16px;height:16px;border:2px 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