:root{--primary: #1976d2;--primary-dark: #1565c0;--secondary: #424242;--success: #4caf50;--warning: #ff9800;--error: #f44336;--bg: #f5f5f5;--surface: #ffffff;--text: #212121;--text-secondary: #757575;--border: #e0e0e0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.app-layout{display:flex;min-height:100vh}.sidebar{width:260px;background:var(--surface);border-right:1px solid var(--border);padding:1rem;display:flex;flex-direction:column}.sidebar-header{padding:1rem;border-bottom:1px solid var(--border);margin-bottom:1rem}.sidebar-header h1{font-size:1.25rem;color:var(--primary)}.sidebar-nav{flex:1}.nav-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border-radius:8px;color:var(--text);text-decoration:none;transition:background .2s}.nav-item:hover,.nav-item.active{background:#1976d21a;color:var(--primary)}.main-content{flex:1;padding:2rem;overflow-y:auto}.page-header{margin-bottom:2rem}.page-header h2{font-size:1.75rem;font-weight:600}.card{background:var(--surface);border-radius:12px;padding:1.5rem;box-shadow:0 1px 3px #0000001a;margin-bottom:1rem}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:8px;font-weight:500;cursor:pointer;border:none;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:1rem;text-align:left;border-bottom:1px solid var(--border)}.table th{font-weight:600;color:var(--text-secondary);font-size:.875rem}.badge{display:inline-block;padding:.25rem .75rem;border-radius:999px;font-size:.75rem;font-weight:500}.badge-success{background:#e8f5e9;color:#2e7d32}.badge-warning{background:#fff3e0;color:#ef6c00}.badge-info{background:#e3f2fd;color:#1565c0}.form-group{margin-bottom:1rem}.form-label{display:block;margin-bottom:.5rem;font-weight:500;font-size:.875rem}.form-input{width:100%;padding:.75rem;border:1px solid var(--border);border-radius:8px;font-size:1rem}.form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #1976d21a}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:2rem}.stat-card{background:var(--surface);border-radius:12px;padding:1.5rem;box-shadow:0 1px 3px #0000001a}.stat-card h3{font-size:.875rem;color:var(--text-secondary);margin-bottom:.5rem}.stat-card .value{font-size:2rem;font-weight:700;color:var(--primary)}