*,*::before,*::after{box-sizing:border-box}
:root{--primary:#2563eb;--primary-hover:#1d4ed8;--success:#16a34a;--success-hover:#15803d;--danger:#dc2626;--danger-hover:#b91c1c;--warning:#f59e0b;--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(0,0,0,0.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1)}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--gray-100);color:var(--gray-800);margin:0;padding:0;min-height:100vh}
.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1rem}
.login-card{background:white;padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%;max-width:400px}
.login-card h1{margin:0 0 1.5rem;font-size:1.5rem;text-align:center;color:var(--gray-900)}
.form-group{margin-bottom:1rem}
.form-group label{display:block;margin-bottom:0.5rem;font-weight:500;color:var(--gray-700)}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:0.75rem;border:1px solid var(--gray-300);border-radius:var(--radius);font-size:1rem;transition:border-color 0.15s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,0.1)}
.form-group input[type="number"]{-moz-appearance:textfield}
.form-group input::-webkit-outer-spin-button,.form-group input::-webkit-inner-spin-button{-webkit-appearance:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:0.5rem;padding:0.75rem 1.5rem;border:none;border-radius:var(--radius);font-size:1rem;font-weight:500;cursor:pointer;transition:all 0.15s}
.btn:disabled{opacity:0.5;cursor:not-allowed}
.btn-primary{background:var(--primary);color:white}
.btn-primary:hover:not(:disabled){background:var(--primary-hover)}
.btn-success{background:var(--success);color:white}
.btn-success:hover:not(:disabled){background:var(--success-hover)}
.btn-danger{background:var(--danger);color:white}
.btn-danger:hover:not(:disabled){background:var(--danger-hover)}
.btn-secondary{background:var(--gray-200);color:var(--gray-700)}
.btn-secondary:hover:not(:disabled){background:var(--gray-300)}
.btn-sm{padding:0.5rem 1rem;font-size:0.875rem}
.btn-block{width:100%}
.app-container{display:flex;min-height:100vh}
.sidebar{width:240px;background:var(--gray-800);color:white;padding:1.5rem 0;flex-shrink:0}
.sidebar-header{padding:0 1.5rem 1.5rem;border-bottom:1px solid var(--gray-700)}
.sidebar-header h1{margin:0;font-size:1.25rem}
.sidebar-nav{padding:1rem 0}
.nav-link{display:flex;align-items:center;gap:0.75rem;padding:0.75rem 1.5rem;color:var(--gray-300);text-decoration:none;transition:all 0.15s}
.nav-link:hover,.nav-link.active{background:var(--gray-700);color:white}
.nav-link svg{width:20px;height:20px}
.sidebar-footer{margin-top:auto;padding:1rem 1.5rem;border-top:1px solid var(--gray-700)}
.user-info{display:flex;align-items:center;gap:0.75rem;margin-bottom:0.75rem;color:var(--gray-300);font-size:0.875rem}
.main-content{flex:1;padding:2rem;overflow-y:auto}
.card{background:white;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:1rem}
.card-header h2{margin:0;font-size:1.25rem}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}
.stat-card{background:white;border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem}
.stat-card .stat-label{font-size:0.875rem;color:var(--gray-500);margin-bottom:0.5rem}
.stat-card .stat-value{font-size:2rem;font-weight:600;color:var(--gray-900)}
.stat-card.warning .stat-value{color:var(--warning)}
.stat-card.danger .stat-value{color:var(--danger)}
.table-container{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:0.75rem 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:0.875rem;text-transform:uppercase;letter-spacing:0.05em}
tr:hover td{background:var(--gray-50)}
.badge{display:inline-block;padding:0.25rem 0.5rem;border-radius:9999px;font-size:0.75rem;font-weight:500}
.badge-success{background:#dcfce7;color:#166534}
.badge-warning{background:#fef3c7;color:#92400e}
.badge-danger{background:#fee2e2;color:#991b1b}
.badge-info{background:#dbeafe;color:#1e40af}
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,0.5);display:flex;align-items:center;justify-content:center;padding:1rem;z-index:100}
.modal{background:white;border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%;max-width:500px;max-height:90vh;overflow-y:auto}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;border-bottom:1px solid var(--gray-200)}
.modal-header h3{margin:0;font-size:1.125rem}
.modal-close{background:none;border:none;padding:0.25rem;cursor:pointer;color:var(--gray-400)}
.modal-close:hover{color:var(--gray-600)}
.modal-body{padding:1.5rem}
.modal-footer{display:flex;justify-content:flex-end;gap:0.75rem;padding:1rem 1.5rem;border-top:1px solid var(--gray-200)}
.alert{padding:1rem;border-radius:var(--radius);margin-bottom:1rem}
.alert-error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}
.alert-success{background:#dcfce7;color:#166534;border:1px solid #bbf7d0}
.alert-info{background:#dbeafe;color:#1e40af;border:1px solid #bfdbfe}
.search-box{display:flex;gap:0.5rem;margin-bottom:1rem}
.search-box input{flex:1;padding:0.75rem;border:1px solid var(--gray-300);border-radius:var(--radius);font-size:1rem}
.empty-state{text-align:center;padding:3rem 1rem;color:var(--gray-500)}
.empty-state svg{width:48px;height:48px;margin-bottom:1rem;opacity:0.5}
.spinner{display:inline-block;width:20px;height:20px;border:2px solid var(--gray-200);border-top-color:var(--primary);border-radius:50%;animation:spin 0.8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:768px){.app-container{flex-direction:column}.sidebar{width:100%;padding:1rem 0}.sidebar-header{display:flex;align-items:center;justify-content:space-between}.sidebar-nav{display:flex;overflow-x:auto;padding:0.5rem 1rem}.nav-link{padding:0.5rem 1rem;white-space:nowrap}.sidebar-footer{display:none}.main-content{padding:1rem}.stats-grid{grid-template-columns:repeat(2,1fr)}}