:root{--brand-primary: #0e63f0;--brand-primary-hover: #0c5ae0;--brand-primary-light: #e6f2ff;--brand-secondary: #10b981;--brand-secondary-hover: #059669;--brand-secondary-light: #d1fae5;--brand-danger: #ef4444;--brand-danger-hover: #dc2626;--brand-danger-light: #fee2e2;--brand-warning: #f59e0b;--brand-warning-hover: #d97706;--brand-warning-light: #fef3c7;--brand-success: #10b981;--brand-success-hover: #059669;--brand-success-light: #d1fae5;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-400: #9ca3af;--gray-500: #6b7280;--gray-600: #4b5563;--gray-700: #374151;--gray-800: #1f2937;--gray-900: #111827;--white: #ffffff;--black: #000000;--background: #f5f5f5;--surface: #ffffff;--surface-hover: #f8f9fa;--border: #e5e7eb;--border-light: #f3f4f6;--text-primary: #1f2937;--text-secondary: #6b7280;--text-muted: #9ca3af;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--space-16: 64px;--space-20: 80px;--space-24: 96px;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--radius-2xl: 16px;--radius-3xl: 20px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px rgba(0, 0, 0, .1);--shadow-2xl: 0 25px 50px rgba(0, 0, 0, .25);--font-size-xs: 12px;--font-size-sm: 14px;--font-size-base: 16px;--font-size-lg: 18px;--font-size-xl: 20px;--font-size-2xl: 24px;--font-size-3xl: 28px;--font-size-4xl: 32px;--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;--transition-fast: .15s ease;--transition-normal: .2s ease;--transition-slow: .3s ease;--z-dropdown: 1000;--z-sticky: 1020;--z-fixed: 1030;--z-modal-backdrop: 1040;--z-modal: 1050;--z-popover: 1060;--z-tooltip: 1070}:root[data-theme=light]{--background: #f5f5f5;--surface: #ffffff;--surface-hover: #f8f9fa;--border: #e5e7eb;--border-light: #f3f4f6;--text-primary: #1f2937;--text-secondary: #6b7280;--text-muted: #9ca3af}:root[data-theme=dark]{--background: #111827;--surface: #1f2937;--surface-hover: #374151;--border: #374151;--border-light: #4b5563;--text-primary: #f9fafb;--text-secondary: #d1d5db;--text-muted: #9ca3af}@media (prefers-color-scheme: dark){:root:not([data-theme]){--background: #111827;--surface: #1f2937;--surface-hover: #374151;--border: #374151;--border-light: #4b5563;--text-primary: #f9fafb;--text-secondary: #d1d5db;--text-muted: #9ca3af}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.focus-visible{outline:2px solid var(--brand-primary);outline-offset:2px}*{box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--background);color:var(--text-primary);line-height:var(--line-height-normal)}button{font-family:inherit;font-size:inherit;line-height:inherit;margin:0;padding:0;border:none;background:none;cursor:pointer}input,textarea,select{font-family:inherit;font-size:inherit;line-height:inherit;margin:0;padding:0;border:none;background:none;outline:none}ul,ol{margin:0;padding:0;list-style:none}h1,h2,h3,h4,h5,h6{margin:0;font-weight:var(--font-weight-semibold);line-height:var(--line-height-tight)}p{margin:0;line-height:var(--line-height-normal)}.theme-toggle{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-lg);background-color:var(--surface);border:1px solid var(--border);color:var(--text-primary);cursor:pointer;transition:all var(--transition-normal);box-shadow:var(--shadow-sm)}.theme-toggle:hover{background-color:var(--surface-hover);border-color:var(--brand-primary);box-shadow:var(--shadow-md);transform:translateY(-1px)}.theme-toggle:active{transform:translateY(0);box-shadow:var(--shadow-sm)}.theme-toggle svg{transition:transform var(--transition-normal)}.theme-toggle:hover svg{transform:scale(1.1)}.app{display:flex;height:100vh;font-family:inherit}.sidebar{width:260px;background:linear-gradient(180deg,var(--surface) 0%,var(--gray-50) 100%);color:var(--text-primary);padding:var(--space-4);border-right:1px solid var(--border);display:flex;flex-direction:column;transition:width var(--transition-slow);overflow-y:auto;overflow-x:hidden;max-height:100vh;box-shadow:2px 0 8px #0000000a}.sidebar.collapsed{width:60px;padding:var(--space-3)}.sidebar-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-6);padding-bottom:var(--space-4);border-bottom:2px solid var(--border)}.sidebar.collapsed .sidebar-header{justify-content:center;margin-bottom:var(--space-4);padding-bottom:var(--space-2)}.logo-container{display:flex;align-items:center;flex:1;min-width:0;transition:opacity var(--transition-normal)}.logo{height:auto;width:90%;max-height:50px;object-fit:contain;transition:transform var(--transition-normal)}.logo:hover{transform:scale(1.05)}.sidebar-header h2{margin:0;font-size:1.25rem;font-weight:600;color:var(--text-primary)}.sidebar-nav{display:flex;flex-direction:column;gap:var(--space-2);flex:1;overflow-y:auto;overflow-x:hidden;padding-bottom:var(--space-4)}.sidebar a,.sidebar button.nav-link{display:flex;align-items:center;gap:var(--space-3);color:var(--text-secondary);padding:var(--space-3) var(--space-4);text-decoration:none;border-radius:var(--radius-lg);transition:all var(--transition-normal);font-weight:var(--font-weight-medium);font-size:var(--font-size-sm);text-align:left;border:none;background:transparent;cursor:pointer;width:100%;position:relative}.sidebar a:before,.sidebar button.nav-link:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:0;background:var(--brand-primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0;transition:height var(--transition-normal)}.sidebar.collapsed a,.sidebar.collapsed button.nav-link{padding:var(--space-3);font-size:1.2rem;text-align:center;justify-content:center}.sidebar a:hover,.sidebar button.nav-link:hover{background-color:var(--surface-hover);color:var(--text-primary);transform:translate(2px)}.sidebar a:hover:before,.sidebar button.nav-link:hover:before{height:60%}.sidebar a.active,.sidebar button.nav-link.active{background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-primary-hover) 100%);color:#fff;font-weight:var(--font-weight-semibold);box-shadow:0 2px 8px #0e63f040}.sidebar a.active:before,.sidebar button.nav-link.active:before{height:100%;background:#fff;opacity:.3}.content{flex:1;padding:1rem;overflow-y:auto;background-color:var(--background);color:var(--text-primary);transition:margin-left var(--transition-normal)}.sidebar.collapsed .sidebar-nav{gap:.5rem}.sidebar.collapsed .nav-link,.sidebar.collapsed button.nav-link{padding:.75rem .25rem!important;font-size:1.2rem!important;text-align:center!important;justify-content:center!important}.sidebar .nav-link{text-align:left!important;justify-content:flex-start!important}.sidebar.collapsed .nav-link span:last-child{display:none!important}.sidebar.collapsed button.nav-link span:last-child{display:none!important}.sidebar .expandable-section{margin:var(--space-2) 0;padding:var(--space-2) var(--space-3);background:var(--gray-50);border-radius:var(--radius-lg);border:1px solid var(--border-light);animation:slideDown .2s ease-out;box-shadow:inset 0 1px 2px #00000005}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px);max-height:0}to{opacity:1;transform:translateY(0);max-height:500px}}.sidebar .expandable-section a{padding:var(--space-2) var(--space-3);margin:var(--space-1) 0;font-size:var(--font-size-sm);border-radius:var(--radius-md);color:var(--text-secondary);transition:all var(--transition-fast)}.sidebar .expandable-section a:hover{background-color:#fff;color:var(--brand-primary);transform:translate(4px);box-shadow:0 1px 3px #0000000d}.sidebar .expandable-section a.active{background:linear-gradient(135deg,var(--brand-primary-light) 0%,rgba(14,99,240,.1) 100%);color:var(--brand-primary);font-weight:var(--font-weight-semibold)}.sidebar .expandable-section a.active:before{height:100%;background:var(--brand-primary)}.sidebar .expandable-content{word-wrap:break-word;overflow-wrap:break-word}.sidebar-header button{padding:var(--space-2);background-color:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;color:var(--text-primary);font-size:var(--font-size-sm);transition:all var(--transition-normal);display:flex;align-items:center;justify-content:center;min-width:32px;height:32px;box-shadow:var(--shadow-sm)}.sidebar-header button:hover{background-color:var(--brand-primary-light);border-color:var(--brand-primary);color:var(--brand-primary);box-shadow:var(--shadow-md);transform:scale(1.05)}.sidebar-header button:active{transform:scale(.95)}.sidebar button.nav-link span:last-child{margin-left:auto;font-size:var(--font-size-xs);transition:transform var(--transition-normal);opacity:.6}.sidebar button.nav-link:hover span:last-child{opacity:1}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}