:root{color-scheme:light;--bg: #f5f6f8;--surface: #ffffff;--border: #dfe3e8;--text: #1f2430;--text-muted: #6b7280;--primary: #2563eb;--primary-hover: #1d4ed8;--danger: #dc2626;--success: #16a34a;--warning: #d97706;--radius: 6px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:14px}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.app-shell{display:flex;min-height:100vh}.sidebar{width:220px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);padding:16px 0;display:flex;flex-direction:column}.sidebar-brand{padding:0 16px 16px;font-weight:700;font-size:16px}.sidebar nav{display:flex;flex-direction:column;gap:2px;flex:1}.sidebar nav a,.sidebar nav .nav-section{padding:8px 16px;color:var(--text);border-left:3px solid transparent}.sidebar nav a:hover{background:var(--bg);text-decoration:none}.sidebar nav a.active{border-left-color:var(--primary);background:var(--bg);font-weight:600}.nav-section{font-size:11px;text-transform:uppercase;color:var(--text-muted);margin-top:12px}.sidebar-user{padding:12px 16px;border-top:1px solid var(--border);font-size:13px}.sidebar-user button{margin-top:6px}.main{flex:1;padding:24px;max-width:1200px}h1{font-size:20px;margin:0 0 16px}h2{font-size:16px;margin:24px 0 8px}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}th,td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--border);font-size:13px}th{background:var(--bg);font-weight:600;color:var(--text-muted)}tr:last-child td{border-bottom:none}tr:hover td{background:#fafbfc}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:16px}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}.stat-tile{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px}.stat-tile .value{font-size:24px;font-weight:700}.stat-tile .label{color:var(--text-muted);font-size:12px}.btn{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;font-size:13px}.btn:hover{background:var(--bg)}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{color:var(--danger);border-color:var(--danger)}.btn-danger:hover{background:#fef2f2}.btn:disabled{opacity:.5;cursor:not-allowed}.form-group{margin-bottom:12px;display:flex;flex-direction:column;gap:4px}.form-group label{font-size:12px;font-weight:600;color:var(--text-muted)}.form-row{display:flex;gap:12px}.form-row .form-group{flex:1}input,select,textarea{padding:6px 8px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;font-family:inherit;background:var(--surface);color:var(--text)}textarea{min-height:70px}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600;background:var(--bg)}.badge-available,.badge-active,.badge-matched{background:#dcfce7;color:#166534}.badge-in_use{background:#dbeafe;color:#1e40af}.badge-defective,.badge-mismatched{background:#fee2e2;color:#991b1b}.badge-retired,.badge-offline{background:#f3f4f6;color:#4b5563}.badge-local_only{background:#fef3c7;color:#92400e}.badge-tenantos_only{background:#e0e7ff;color:#3730a3}.error-text{color:var(--danger);font-size:13px}.muted{color:var(--text-muted)}.empty-state{padding:32px;text-align:center;color:var(--text-muted)}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh}.login-box{width:320px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.login-box h1{text-align:center}.pagination{display:flex;gap:8px;align-items:center;margin-top:12px}.rack-grid{display:flex;flex-direction:column-reverse;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;width:320px}.rack-unit{border-bottom:1px solid var(--border);padding:2px 8px;font-size:11px;display:flex;align-items:center;min-height:18px}.rack-unit.occupied{background:#dbeafe}.rack-unit .unit-num{width:24px;color:var(--text-muted)}.tabs{display:flex;gap:4px;margin-bottom:16px;border-bottom:1px solid var(--border)}.tabs button{background:none;border:none;padding:8px 12px;cursor:pointer;border-bottom:2px solid transparent;font-size:13px}.tabs button.active{border-bottom-color:var(--primary);font-weight:600}.toast-container{position:fixed;top:16px;right:16px;display:flex;flex-direction:column;gap:8px;z-index:1000}.toast{padding:10px 14px;border-radius:var(--radius);background:var(--text);color:#fff;font-size:13px;box-shadow:0 2px 8px #00000026}.toast.error{background:var(--danger)}.toast.success{background:var(--success)}