:root{--primary: #667eea;--primary-dark: #5568d3;--secondary: #764ba2;--success: #10b981;--warning: #f59e0b;--danger: #dc2626;--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;--sidebar-width: 240px;--header-height: 64px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow: 0 1px 3px 0 rgb(0 0 0 / .1);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--gray-50);color:var(--gray-900);line-height:1.6}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);padding:20px}.login-card{background:#fff;border-radius:16px;box-shadow:var(--shadow-xl);padding:48px;width:100%;max-width:420px}.login-header{text-align:center;margin-bottom:32px}.login-icon{font-size:3rem;margin-bottom:16px}.login-header h1{font-size:2rem;background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:700;margin-bottom:8px}.login-header p{color:var(--gray-600);margin-top:8px}.error-message{background:#fee2e2;color:#991b1b;padding:12px 16px;border-radius:8px;border-left:4px solid var(--danger);margin-bottom:24px;font-size:.875rem}.form-group{margin-bottom:24px}.form-group label{display:block;font-weight:600;margin-bottom:8px;color:var(--gray-700)}.form-input{width:100%;padding:12px 16px;border:2px solid var(--gray-200);border-radius:8px;font-size:1rem;transition:all .3s ease}.form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #667eea1a}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;text-decoration:none}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;width:100%}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-primary:active{transform:translateY(0)}.app-layout{display:flex;height:100vh;background:var(--gray-50)}.sidebar{width:var(--sidebar-width);background:#fff;border-right:1px solid var(--gray-200);display:flex;flex-direction:column;box-shadow:var(--shadow-sm)}.sidebar-header{padding:16px;border-bottom:1px solid var(--gray-200)}.sidebar-logo{font-size:1.5rem;font-weight:700;color:#667eea;cursor:pointer}.sidebar-nav{flex:1;padding:12px 0;overflow-y:auto}.nav-section{margin-bottom:16px}.nav-section-title{padding:0 16px;font-size:.65rem;font-weight:600;text-transform:uppercase;color:var(--gray-500);letter-spacing:.05em;margin-bottom:6px}.nav-item{display:flex;align-items:center;padding:8px 16px;color:var(--gray-700);text-decoration:none;transition:all .2s ease;cursor:pointer;border-left:3px solid transparent;font-size:.875rem}.nav-item:hover{background:var(--gray-50);color:var(--primary)}.nav-item.active{background:linear-gradient(90deg,rgba(102,126,234,.1),transparent);color:var(--primary);border-left-color:var(--primary);font-weight:600}.nav-icon{margin-right:10px;font-size:1.1rem}.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden}.top-header{height:var(--header-height);background:#fff;border-bottom:1px solid var(--gray-200);padding:0 32px;display:flex;align-items:center;justify-content:space-between;box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:100}.header-title{font-size:1.5rem;font-weight:700;color:var(--gray-900)}.header-actions{display:flex;align-items:center;gap:16px}.user-menu{display:flex;align-items:center;gap:12px;padding:8px 16px;border-radius:8px;cursor:pointer;transition:background .2s ease}.user-menu:hover{background:var(--gray-50)}.user-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600}.stats-header{padding:24px 32px;background:#fff;border-bottom:1px solid var(--gray-200)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}.stat-card{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;padding:20px;border-radius:12px;box-shadow:var(--shadow-md)}.stat-number{font-size:2rem;font-weight:700;margin-bottom:4px}.stat-label{font-size:.875rem;opacity:.9}.stat-card.success{background:linear-gradient(135deg,var(--success),#059669)}.stat-card.warning{background:linear-gradient(135deg,var(--warning),#dc2626)}.content-area{flex:1;overflow-y:auto;padding:32px}.content-card{background:#fff;border-radius:12px;box-shadow:var(--shadow);padding:24px;margin-bottom:24px}.content-card h2{font-size:1.25rem;font-weight:700;margin-bottom:16px;color:var(--gray-900)}.table-container{overflow-x:auto}table{width:100%;border-collapse:collapse}thead{background:var(--gray-50)}th{padding:12px;text-align:left;font-weight:600;color:var(--gray-700);border-bottom:2px solid var(--gray-200)}td{padding:12px;border-bottom:1px solid var(--gray-100)}tr:hover{background:var(--gray-50)}.btn-secondary{background:var(--gray-200);color:var(--gray-700)}.btn-secondary:hover{background:var(--gray-300)}.btn-success{background:var(--success);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-sm{padding:8px 16px;font-size:.875rem}.upload-area{border:3px dashed var(--gray-300);border-radius:12px;padding:48px;text-align:center;background:var(--gray-50);cursor:pointer;transition:all .3s ease}.upload-area:hover{border-color:var(--primary);background:#667eea0d}.upload-area.dragover{border-color:var(--primary);background:#667eea1a}.upload-icon{font-size:3rem;margin-bottom:16px;color:var(--gray-400)}.filters-section{background:#fff;border-radius:12px;padding:20px;margin-bottom:24px;box-shadow:var(--shadow)}.filter-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:16px}.filter-actions{display:flex;gap:12px;flex-wrap:wrap}@media (max-width: 768px){:root{--sidebar-width: 240px}.stats-grid,.filter-grid{grid-template-columns:1fr}}.spinner{border:3px solid var(--gray-200);border-top:3px solid var(--primary);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:20px auto}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.alert{padding:16px;border-radius:8px;margin-bottom:20px}.alert-success{background:#d1fae5;color:#065f46;border-left:4px solid var(--success)}.alert-error{background:#fee2e2;color:#991b1b;border-left:4px solid var(--danger)}.alert-warning{background:#fef3c7;color:#92400e;border-left:4px solid var(--warning)}.pricing-grid{display:grid;gap:24px;max-width:1200px;margin:0 auto}@media (max-width: 767px){.pricing-grid{grid-template-columns:1fr}}@media (min-width: 768px) and (max-width: 1023px){.pricing-grid{grid-template-columns:repeat(2,1fr)}.pricing-grid>:nth-child(4){grid-column:1 / -1}}@media (min-width: 1024px){.pricing-grid{grid-template-columns:repeat(3,1fr)}.pricing-grid>:nth-child(4){grid-column:1 / -1}}