:root{--primary: #1a56db;--primary-dark: #1e40af;--primary-light: #dbeafe;--success: #059669;--success-light: #d1fae5;--danger: #dc2626;--danger-light: #fee2e2;--warning: #d97706;--warning-light: #fef3c7;--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;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);--shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--gray-50);color:var(--gray-800);line-height:1.6}.loading-screen{display:flex;align-items:center;justify-content:center;height:100vh;font-size:1.25rem;color:var(--gray-500)}.app-layout{display:flex;min-height:100vh}.sidebar{width:260px;background:var(--gray-900);color:#fff;display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100}.sidebar-header{padding:1.5rem;border-bottom:1px solid var(--gray-700);display:flex;align-items:center;gap:.75rem}.sidebar-header .logo{font-size:1.75rem}.sidebar-header h1{font-size:1.1rem;font-weight:600}.sidebar-nav{flex:1;padding:1rem 0}.sidebar-nav a{display:flex;align-items:center;gap:.75rem;padding:.75rem 1.5rem;color:var(--gray-300);text-decoration:none;font-size:.9rem;transition:all .2s;border-left:3px solid transparent}.sidebar-nav a:hover,.sidebar-nav a.active{background:var(--gray-800);color:#fff;border-left-color:var(--primary)}.sidebar-nav a .icon{font-size:1.2rem;width:24px;text-align:center}.sidebar-footer{padding:1rem 1.5rem;border-top:1px solid var(--gray-700);font-size:.85rem;color:var(--gray-400)}.main-content{margin-left:260px;flex:1;padding:2rem}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem}.topbar h2{font-size:1.5rem;font-weight:700;color:var(--gray-900)}.topbar-right{display:flex;align-items:center;gap:1rem}.user-info{display:flex;align-items:center;gap:.5rem;font-size:.9rem}.user-info .avatar{width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.9rem}.user-info .role-badge{font-size:.7rem;padding:.15rem .5rem;border-radius:12px;font-weight:600;text-transform:uppercase}.role-badge.admin{background:var(--danger-light);color:var(--danger)}.role-badge.supplier{background:var(--primary-light);color:var(--primary)}.role-badge.viewer{background:var(--gray-200);color:var(--gray-600)}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.55rem 1.25rem;border:none;border-radius:var(--radius);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s;text-decoration:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#047857}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#b91c1c}.btn-outline{background:#fff;color:var(--gray-700);border:1px solid var(--gray-300)}.btn-outline:hover{background:var(--gray-50);border-color:var(--gray-400)}.btn-sm{padding:.35rem .75rem;font-size:.8rem}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem;margin-bottom:1.5rem}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.25rem;padding-bottom:1rem;border-bottom:1px solid var(--gray-200)}.card-header h3{font-size:1.1rem;font-weight:600}.table-wrapper{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.875rem}th,td{padding:.75rem 1rem;text-align:left;border-bottom:1px solid var(--gray-200)}th{background:var(--gray-50);font-weight:600;color:var(--gray-600);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}tr:hover{background:var(--gray-50)}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.35rem;font-weight:500;font-size:.875rem;color:var(--gray-700)}.form-control{width:100%;padding:.6rem .9rem;border:1px solid var(--gray-300);border-radius:var(--radius);font-size:.9rem;transition:border-color .2s;font-family:inherit}.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.badge{display:inline-block;padding:.2rem .6rem;border-radius:12px;font-size:.75rem;font-weight:600}.badge-open{background:var(--success-light);color:var(--success)}.badge-closed{background:var(--danger-light);color:var(--danger)}.badge-cancelled{background:var(--gray-200);color:var(--gray-500)}.badge-finished{background:#e0e7ff;color:#3730a3}.badge-active{background:var(--success-light);color:var(--success)}.badge-inactive{background:var(--danger-light);color:var(--danger)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e3a5f,#1a56db)}.login-card{background:#fff;border-radius:12px;padding:2.5rem;width:100%;max-width:420px;box-shadow:var(--shadow-lg)}.login-card .login-logo{text-align:center;font-size:3rem;margin-bottom:.5rem}.login-card h2{text-align:center;margin-bottom:.25rem;font-size:1.5rem}.login-card .subtitle{text-align:center;color:var(--gray-500);margin-bottom:2rem;font-size:.9rem}.login-card .btn{width:100%;justify-content:center;margin-top:1rem;padding:.75rem}.error-msg{background:var(--danger-light);color:var(--danger);padding:.75rem;border-radius:var(--radius);margin-bottom:1rem;font-size:.875rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:2rem}.stat-card{background:#fff;border-radius:var(--radius);padding:1.25rem;box-shadow:var(--shadow);display:flex;align-items:center;gap:1rem}.stat-card .stat-icon{font-size:2rem}.stat-card .stat-value{font-size:1.5rem;font-weight:700;color:var(--gray-900)}.stat-card .stat-label{font-size:.8rem;color:var(--gray-500)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:#fff;border-radius:12px;padding:2rem;width:90%;max-width:700px;max-height:85vh;overflow-y:auto;box-shadow:var(--shadow-lg)}.modal h3{margin-bottom:1.5rem}.items-grid{display:grid;grid-template-columns:60px 1fr 100px 120px auto;gap:.5rem;align-items:end;margin-bottom:1rem}.items-header{font-size:.75rem;font-weight:600;color:var(--gray-500);text-transform:uppercase;padding-bottom:.5rem}.compare-table th,.compare-table td{min-width:130px}.compare-table .supplier-col{background:var(--primary-light)}.compare-table .total-row{font-weight:700;background:var(--gray-50)}.toast{position:fixed;top:1rem;right:1rem;z-index:2000;padding:1rem 1.5rem;border-radius:var(--radius);color:#fff;font-weight:500;box-shadow:var(--shadow-lg);animation:slideIn .3s ease}.toast-success{background:var(--success)}.toast-error{background:var(--danger)}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.deadline-warning{color:var(--warning)}.deadline-passed{color:var(--danger)}@media (max-width: 768px){.sidebar{display:none}.main-content{margin-left:0}}