*{box-sizing:border-box;margin:0;padding:0}:root{--primary:#2563eb;--primary-dark:#1d4ed8;--bg:#f5f7fa;--sidebar-bg:#1e293b;--sidebar-text:#cbd5e1;--sidebar-active:#2563eb;--text:#1a1a1a;--text-muted:#9e9e9e;--border:#e5e7eb;--card-bg:#fff;--success:#16a34a;--warning:#d97706;--danger:#dc2626;--radius:10px;--shadow:0 1px 3px #00000014}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.app-container{min-height:100vh;display:flex}.main-content{flex-direction:column;flex:1;margin-left:240px;display:flex}.page-container{flex:1;padding:24px}.sidebar{background:var(--sidebar-bg);width:240px;color:var(--sidebar-text);z-index:100;flex-direction:column;display:flex;position:fixed;top:0;bottom:0;left:0}.sidebar-logo{border-bottom:1px solid #ffffff14;padding:24px 20px}.sidebar-logo h2{color:#fff;letter-spacing:.1em;font-size:20px}.sidebar-nav{flex:1;padding:16px 12px;overflow-y:auto}.nav-item{color:var(--sidebar-text);cursor:pointer;text-align:left;background:0 0;border:none;border-radius:8px;align-items:center;gap:12px;width:100%;margin-bottom:4px;padding:11px 14px;font-size:14px;font-weight:500;text-decoration:none;transition:background .2s,color .2s;display:flex}.nav-item:hover{color:#fff;background:#ffffff0f}.nav-item.active{background:var(--sidebar-active);color:#fff}.nav-toggle{justify-content:space-between}.nav-toggle>span:first-child{flex:1}.nav-submenu{border-left:1px solid #ffffff1a;margin-left:12px;padding-left:8px}.nav-submenu-inner{margin-left:12px}.nav-sub{padding:8px 12px;font-size:13px}.sidebar-footer{border-top:1px solid #ffffff14;padding:16px 12px}.logout-btn{color:#f87171}.logout-btn:hover{color:#f87171;background:#f871711a}.header{background:var(--card-bg);border-bottom:1px solid var(--border);z-index:50;justify-content:space-between;align-items:center;padding:18px 24px;display:flex;position:sticky;top:0}.header h1{font-size:20px;font-weight:600}.user-profile{color:var(--text);align-items:center;gap:10px;font-size:14px;display:flex}.avatar{background:var(--primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-weight:600;display:flex}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:24px}.card-header{border-bottom:1px solid var(--border);padding:16px 20px}.card-header h3{font-size:16px;font-weight:600}.card-body{padding:20px}.dashboard-header{margin-bottom:20px}.period-selector{background:var(--card-bg);border:1px solid var(--border);border-radius:8px;gap:4px;padding:4px;display:inline-flex}.period-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:8px 16px;font-size:13px;font-weight:500;transition:all .2s}.period-btn:hover{color:var(--text)}.period-btn.active{background:var(--primary);color:#fff}.summary-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px;display:grid}.summary-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.summary-label{color:var(--text-muted);margin-bottom:8px;font-size:13px;display:block}.summary-value{color:var(--text);font-size:24px;font-weight:700}.chart-container{width:100%}.chart-placeholder{height:350px;color:var(--text-muted);justify-content:center;align-items:center;display:flex}.skeleton{background:linear-gradient(90deg,#e5e7eb 25%,#f3f4f6 50%,#e5e7eb 75%) 0 0/200% 100%;border-radius:4px;animation:1.5s infinite shimmer}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.data-table{border-collapse:collapse;width:100%;font-size:14px}.data-table th{text-align:left;border-bottom:2px solid var(--border);color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;padding:12px 14px;font-size:12px;font-weight:600}.data-table td{border-bottom:1px solid var(--border);padding:12px 14px}.data-table tr:last-child td{border-bottom:none}.data-table tbody tr:hover{background:#f9fafb}.status-badge{border-radius:999px;padding:4px 10px;font-size:12px;font-weight:600;display:inline-block}.status-available,.status-paid{color:var(--success);background:#dcfce7}.status-in_use,.status-pending{color:var(--warning);background:#fef3c7}.status-maintenance,.status-failed{color:var(--danger);background:#fee2e2}.status-offline,.status-refunded{color:#6b7280;background:#f3f4f6}.error-message{color:var(--danger);text-align:center;padding:20px}.empty-message{color:var(--text-muted);text-align:center;padding:20px}@media (width<=768px){.sidebar{width:60px}.sidebar-logo h2,.nav-item span{display:none}.main-content{margin-left:60px}.summary-grid{grid-template-columns:1fr 1fr}}