:root{--primary:#667eea;--primary-dark:#5568d3;--secondary:#6c757d;--success:#28a745;--danger:#dc3545;--warning:#ffc107;--info:#17a2b8;--light:#f8f9fa;--dark:#343a40;--white:#fff;--sidebar-bg:#2c3e50;--sidebar-hover:#34495e;--text-muted:#6c757d}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:14px;line-height:1.5;color:#333;background:#f5f7fa}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%)}.login-container{width:100%;max-width:450px;padding:2rem}.login-card{background:#fff;border-radius:1rem;padding:3rem;box-shadow:0 20px 60px rgba(0,0,0,.3)}.login-header{text-align:center;margin-bottom:2rem}.login-header .logo{width:80px;height:80px;background:linear-gradient(135deg,#ff4757 0%,#ff6b7a 100%);border-radius:50%;margin:0 auto 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#ffeaa7}.table-responsive{overflow-x:auto}.table{width:100%;border-collapse:collapse}.table thead{background:#f8f9fa}.table th{padding:1rem;text-align:left;font-weight:600;color:#2c3e50;border-bottom:2px solid #e5e7eb}.table td{padding:1rem;border-bottom:1px solid #e5e7eb}.table tbody tr:hover{background:#f8f9fa}.table-sm td,.table-sm th{padding:.5rem}.badge{display:inline-block;padding:.25rem 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1rem)}.col-md-4{flex:0 0 calc(33.333% - 1rem)}.col-md-6{flex:0 0 calc(50% - 1rem)}.col-md-8{flex:0 0 calc(66.666% - 1rem)}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.text-success{color:var(--success)}.text-danger{color:var(--danger)}.text-warning{color:var(--warning)}.text-info{color:var(--info)}.text-white{color:#fff}.mt-3{margin-top:1rem}.mt-4{margin-top:1.5rem}.mb-3{margin-bottom:1rem}.mb-4{margin-bottom:1.5rem}.tip-item{display:flex;gap:1rem;margin-bottom:1.5rem}.tip-item i{font-size:1.5rem}.tip-item strong{display:block;margin-bottom:.25rem}.tip-item p{margin:0;font-size:.875rem;color:var(--text-muted)}@media (max-width:768px){.admin-sidebar{width:100%;position:static;height:auto}.admin-main{margin-left:0}.stats-grid{grid-template-columns:1fr}.row{flex-direction:column}.col-md-2,.col-md-3,.col-md-4,.col-md-6,.col-md-8{flex:0 0 100%}.page-header{flex-direction:column;align-items:flex-start;gap:1rem}}