:root{--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-card:#1e293b;--bg-hover:#334155;--text-primary:#f8fafc;--text-secondary:#94a3b8;--accent:#3b82f6;--accent-hover:#2563eb;--border:#334155;--success:#22c55e;--warning:#f59e0b;--danger:#ef4444}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh}a{color:var(--accent);text-decoration:none}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.btn-primary{background:var(--accent);color:white}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-hover);color:var(--text-primary)}.btn-danger{background:var(--danger);color:white}.btn-sm{padding:6px 12px;font-size:13px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:20px}.input{width:100%;padding:10px 14px;background:var(--bg-primary);border:1px solid var(--border);border-radius:8px;color:var(--text-primary);font-size:14px;transition:border-color .2s}.input:focus{outline:none;border-color:var(--accent)}.input::placeholder{color:var(--text-secondary)}.app-layout{display:flex;min-height:100vh}.sidebar{width:260px;background:var(--bg-secondary);border-right:1px solid var(--border);padding:20px 0;display:flex;flex-direction:column}.sidebar-logo{padding:0 20px 20px;border-bottom:1px solid var(--border);margin-bottom:10px}.sidebar-logo h2{font-size:18px;font-weight:700;display:flex;align-items:center;gap:8px}.sidebar-logo span{color:var(--text-secondary);font-size:12px;font-weight:400}.sidebar-nav{flex:1;padding:10px 12px}.sidebar-nav a,.sidebar-nav button{display:flex;align-items:center;gap:10px;padding:10px 14px;color:var(--text-secondary);border-radius:8px;font-size:14px;transition:all .15s;cursor:pointer;border:none;background:none;width:100%;text-align:left;font-family:inherit}.sidebar-nav a:hover,.sidebar-nav button:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-nav a.active{background:var(--accent);color:white}.sidebar-user{padding:16px 20px;border-top:1px solid var(--border);display:flex;align-items:center;gap:10px}.sidebar-user .avatar{width:36px;height:36px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px;color:white}.sidebar-user .user-info{flex:1}.sidebar-user .user-name{font-size:14px;font-weight:500}.sidebar-user .user-email{font-size:12px;color:var(--text-secondary)}.main-content{flex:1;padding:30px;overflow-y:auto}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.page-header h1{font-size:24px;font-weight:700}.page-header p{color:var(--text-secondary);font-size:14px;margin-top:4px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:20px}.stat-card .stat-label{font-size:13px;color:var(--text-secondary);margin-bottom:8px}.stat-card .stat-value{font-size:28px;font-weight:700}.stat-card .stat-change{font-size:12px;margin-top:4px}.stat-card .stat-change.positive{color:var(--success)}.stat-card .stat-change.negative{color:var(--danger)}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:16px}.chart-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;overflow:hidden}.chart-card .chart-header{padding:16px 20px 0;font-size:15px;font-weight:600}.chart-card .chart-body{padding:8px;min-height:280px}.dash-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:20px;cursor:pointer;transition:all .2s}.dash-card:hover{border-color:var(--accent);transform:translateY(-2px)}.dash-card h3{font-size:16px;margin-bottom:6px}.dash-card p{font-size:13px;color:var(--text-secondary)}.dash-card .dash-meta{margin-top:12px;display:flex;gap:12px;font-size:12px;color:var(--text-secondary)}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-primary)}.login-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:16px;padding:40px;width:100%;max-width:400px}.login-card h1{font-size:24px;font-weight:700;margin-bottom:8px}.login-card .subtitle{color:var(--text-secondary);margin-bottom:32px;font-size:14px}.login-card .form-group{margin-bottom:16px}.login-card label{display:block;font-size:13px;font-weight:500;margin-bottom:6px;color:var(--text-secondary)}.login-card .btn{width:100%;justify-content:center;padding:12px;font-size:15px}.login-card .demo-hint{margin-top:16px;padding:12px;background:var(--bg-primary);border-radius:8px;font-size:13px;color:var(--text-secondary)}.login-card .demo-hint strong{color:var(--text-primary)}.error-msg{color:var(--danger);font-size:13px;margin-bottom:12px}.data-table{width:100%;border-collapse:collapse}.data-table th{text-align:left;padding:12px 16px;border-bottom:2px solid var(--border);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary)}.data-table td{padding:10px 16px;border-bottom:1px solid var(--border);font-size:14px}.data-table tr:hover td{background:var(--bg-hover)}@media (max-width:768px){.sidebar{display:none}.main-content{padding:16px}.stats-grid{grid-template-columns:1fr 1fr}.dashboard-grid{grid-template-columns:1fr}}.react-grid-layout{position:relative;transition:height .2s ease}.react-grid-item{transition:all .2s ease;transition-property:left,top,width,height}.react-grid-item.cssTransforms{transition-property:transform,width,height}.react-grid-item>.react-resizable-handle{position:absolute;width:20px;height:20px}.react-grid-item>.react-resizable-handle:after{content:"";position:absolute;right:3px;bottom:3px;width:5px;height:5px;border-right:2px solid rgba(255,255,255,.3);border-bottom:2px solid rgba(255,255,255,.3)}.loading{display:flex;align-items:center;justify-content:center;min-height:200px;color:var(--text-secondary)}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:32px;height:32px;animation:spin .8s linear infinite;margin-right:12px}@keyframes spin{to{transform:rotate(1turn)}}.toast{position:fixed;top:20px;right:20px;padding:12px 20px;border-radius:8px;font-size:14px;z-index:1000;animation:slideIn .3s ease}.toast.success{background:var(--success);color:white}.toast.error{background:var(--danger);color:white}@keyframes slideIn{0%{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}.tab-bar{display:flex;gap:0;border-bottom:1px solid var(--border);margin-bottom:24px}.tab-bar button{padding:10px 20px;background:none;border:none;border-bottom:2px solid transparent;color:var(--text-secondary);cursor:pointer;font-size:14px;font-weight:500;transition:all .15s}.tab-bar button:hover{color:var(--text-primary)}.tab-bar button.active{color:var(--accent);border-bottom-color:var(--accent)}