*{box-sizing:border-box;margin:0;padding:0}:root{--primary: #0066cc;--primary-hover: #0052a3;--surface: #ffffff;--background: #f5f5f5;--border: #ddd;--text: #333;--text-secondary: #666;--success: #28a745;--error: #dc3545;--warning: #ffc107}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--background);color:var(--text);line-height:1.6}.app-layout{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--surface);border-right:1px solid var(--border);padding:20px 0;position:fixed;height:100vh;overflow-y:auto}.sidebar-logo{padding:0 20px 20px;border-bottom:1px solid var(--border);margin-bottom:20px}.sidebar-logo h1{font-size:1.2rem;color:var(--primary)}.nav-link{display:block;padding:12px 20px;color:var(--text);text-decoration:none;transition:background .2s}.nav-link:hover,.nav-link.active{background:#f0f7ff;color:var(--primary);border-right:3px solid var(--primary)}.main-content{flex:1;margin-left:220px;padding:20px 20px 80px;min-height:100vh}.header{background:var(--surface);padding:15px 20px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;margin:-20px -20px 20px}.header-user{display:flex;align-items:center;gap:15px}.btn-logout{background:none;border:1px solid var(--border);padding:6px 12px;border-radius:4px;cursor:pointer}.btn-logout:hover{background:var(--background)}.card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:20px;margin-bottom:20px}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;padding-bottom:10px;border-bottom:1px solid var(--border)}.card-title{font-size:1.1rem;font-weight:600}.form-group{margin-bottom:15px}.form-label{display:block;margin-bottom:5px;font-weight:500}.form-input,.form-select,.form-textarea{width:100%;padding:10px;border:1px solid var(--border);border-radius:6px;font-size:14px}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #0066cc1a}.btn{padding:10px 20px;border:none;border-radius:6px;font-size:14px;cursor:pointer;transition:opacity .2s}.btn:hover{opacity:.9}.btn-primary{background:var(--primary);color:#fff}.btn-secondary{background:var(--background);color:var(--text);border:1px solid var(--border)}.btn-success{background:var(--success);color:#fff}.btn-error{background:var(--error);color:#fff}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:12px;text-align:left;border-bottom:1px solid var(--border)}.table th{background:var(--background);font-weight:600}.badge{display:inline-block;padding:4px 8px;border-radius:4px;font-size:12px;font-weight:500}.badge-success{background:#d4edda;color:#155724}.badge-error{background:#f8d7da;color:#721c24}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:20px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:20px}.stat-value{font-size:2rem;font-weight:700;color:var(--primary)}.stat-label{color:var(--text-secondary);font-size:.9rem}.login-container{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--background)}.login-box{background:var(--surface);padding:40px;border-radius:8px;box-shadow:0 2px 10px #0000001a;width:100%;max-width:400px}.login-title{text-align:center;margin-bottom:30px;color:var(--primary)}.test-result{background:var(--background);padding:15px;border-radius:6px;font-family:monospace;font-size:13px;white-space:pre-wrap;overflow-x:auto}.test-success{border-left:4px solid var(--success)}.test-error{border-left:4px solid var(--error)}