:root{--primary-color: #2563eb;--primary-hover: #1d4ed8;--bg-color: #f3f4f6;--sidebar-bg: #1f2937;--sidebar-text: #e5e7eb;--card-bg: #ffffff;--text-main: #111827;--text-muted: #6b7280;--danger: #ef4444;--success: #10b981;--border-radius: 8px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06)}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-main)}*{box-sizing:border-box}.app-container{display:flex;height:100vh}.sidebar{width:260px;background-color:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;padding:1rem}.sidebar-header{font-size:1.5rem;font-weight:700;margin-bottom:2rem;display:flex;align-items:center;gap:.5rem}.nav-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;color:var(--sidebar-text);text-decoration:none;border-radius:var(--border-radius);margin-bottom:.5rem;transition:background-color .2s}.nav-item:hover,.nav-item.active{background-color:#ffffff1a}.main-content{flex:1;padding:2rem;overflow-y:auto}.card{background:var(--card-bg);padding:1.5rem;border-radius:var(--border-radius);box-shadow:var(--shadow);margin-bottom:1.5rem}.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem}.stat-card h3{margin:0;font-size:.875rem;color:var(--text-muted)}.stat-card .value{font-size:2rem;font-weight:700;margin-top:.5rem}.btn{padding:.5rem 1rem;border-radius:var(--border-radius);border:none;cursor:pointer;font-weight:500;transition:background .2s}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-group input{width:100%;padding:.75rem;border:1px solid #d1d5db;border-radius:var(--border-radius);transition:border-color .2s}.form-group input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #2563eb1a}.table-container{overflow-x:auto}.table{width:100%;border-collapse:collapse}.table th{text-align:left;padding:1rem;border-bottom:2px solid #f3f4f6;color:var(--text-muted);font-weight:600;font-size:.875rem;text-transform:uppercase;letter-spacing:.05em}.table td{padding:1rem;border-bottom:1px solid #f3f4f6;vertical-align:middle}.table tr:last-child td{border-bottom:none}.table tr:hover{background-color:#f9fafb}.badge{display:inline-flex;align-items:center;padding:.25rem .5rem;border-radius:9999px;font-size:.75rem;font-weight:600}.badge-success{background-color:#dcfce7;color:#166534}.badge-warning{background-color:#fef9c3;color:#854d0e}.badge-danger{background-color:#fee2e2;color:#991b1b}.alert{padding:1rem;border-radius:var(--border-radius);margin-bottom:1rem;font-weight:500}.alert-success{background-color:#def7ec;color:#03543f}.alert-error{background-color:#fde8e8;color:#9b1c1c}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.page-header h2{margin:0;font-size:1.5rem;color:var(--text-main)}