:root{--primary-color:#4f46e5;--primary-hover:#4338ca;--secondary-color:#10b981;--accent-color:#f59e0b;--danger-color:#ef4444;--bg-color:#f3f4f6;--card-bg:#fff;--text-main:#1f2937;--text-muted:#6b7280;--border-color:#e5e7eb;--sidebar-width:250px;--header-height:64px;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1) , 0 2px 4px -1px rgba(0,0,0,.06);--radius-md:.5rem;--radius-lg:.75rem}*{box-sizing:border-box;margin:0;padding:0}body{font-family:'Inter',system-ui,-apple-system,sans-serif;background-color:var(--bg-color);color:var(--text-main);line-height:1.5;display:flex;min-height:100vh}.app-container{display:flex;width:100%}.sidebar{width:var(--sidebar-width);background-color:var(--card-bg);border-right:1px solid var(--border-color);height:100vh;position:fixed;top:0;left:0;display:flex;flex-direction:column;padding:1.5rem}.main-content{flex:1;margin-left:var(--sidebar-width);padding:2rem}.brand{font-size:1.5rem;font-weight:700;color:var(--primary-color);margin-bottom:2rem;display:flex;align-items:center;gap:.5rem}.nav-links{list-style:none;display:flex;flex-direction:column;gap:.5rem}.nav-link{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;text-decoration:none;color:var(--text-muted);border-radius:var(--radius-md);transition:all .2s ease}.nav-link:hover,.nav-link.active{background-color:#eef2ff;color:var(--primary-color)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem;margin-bottom:2rem}.stat-card{background-color:var(--card-bg);padding:1.5rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}.stat-title{font-size:.875rem;color:var(--text-muted);margin-bottom:.5rem}.stat-value{font-size:1.875rem;font-weight:600;color:var(--text-main)}.table-container{background-color:var(--card-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden;border:1px solid var(--border-color)}table{width:100%;border-collapse:collapse}th,td{padding:1rem 1.5rem;text-align:left;border-bottom:1px solid var(--border-color)}th{background-color:#f9fafb;font-weight:600;font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}tr:last-child td{border-bottom:none}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.5rem 1rem;border-radius:var(--radius-md);font-weight:500;text-decoration:none;cursor:pointer;transition:background-color .2s;border:none}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.mb-4{margin-bottom:1rem}.flex{display:flex}.justify-between{justify-content:space-between}.items-center{align-items:center}.error-page{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;text-align:center;width:100%;margin-left:0}