:root {
    --primary: #1a1a2e;
    --primary-light: #16213e;
    --accent: #0f3460;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
    --sidebar-width: 250px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }
a { color: var(--accent); text-decoration: none; }

.auth-container { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.auth-box { width: 100%; max-width: 420px; }
.auth-header { text-align: center; margin-bottom: 30px; }
.auth-header h1 { font-size: 28px; color: var(--primary); display: flex; align-items: center; justify-content: center; gap: 10px; }
.auth-header p { color: var(--muted); font-size: 14px; margin-top: 5px; }

.tabs { display: flex; gap: 0; margin-bottom: 0; border-radius: 8px 8px 0 0; overflow: hidden; border: 1px solid var(--border); border-bottom: none; }
.tab { flex: 1; padding: 12px; text-align: center; background: var(--bg); border: none; cursor: pointer; font-size: 13px; font-weight: 500; color: var(--muted); transition: all 0.2s; }
.tab.active { background: var(--card); color: var(--primary); font-weight: 600; }
.tab:hover { background: var(--card); }
.tab-content { display: none; }
.tab-content.active { display: block; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.card-header { padding: 16px 20px; border-bottom: 1px solid var(--border); }
.card-header h3 { font-size: 16px; font-weight: 600; }
.card-header p { font-size: 13px; color: var(--muted); margin-top: 2px; }
.card-body { padding: 20px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 5px; color: var(--text); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px;
    font-size: 14px; background: var(--card); color: var(--text); outline: none; transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--accent); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 20px; border: none; border-radius: 6px; font-size: 14px; font-weight: 500; cursor: pointer; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-light); }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { opacity: 0.9; }
.btn-success { background: var(--success); color: white; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.app-layout { display: flex; min-height: 100vh; }
.sidebar { width: var(--sidebar-width); background: var(--primary); color: white; position: fixed; top: 0; left: 0; bottom: 0; overflow-y: auto; z-index: 100; transition: transform 0.3s; }
.sidebar-header { padding: 20px; display: flex; align-items: center; gap: 10px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.sidebar-logo { width: 36px; height: 36px; background: rgba(255,255,255,0.2); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-weight: bold; }
.sidebar-title { font-size: 15px; font-weight: 600; }
.sidebar-subtitle { font-size: 11px; opacity: 0.7; }
.sidebar-section { padding: 12px 16px 4px; font-size: 11px; text-transform: uppercase; letter-spacing: 1px; opacity: 0.5; }
.sidebar-nav { list-style: none; padding: 4px 8px; }
.sidebar-nav li a { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 6px; color: rgba(255,255,255,0.8); font-size: 14px; transition: all 0.2s; }
.sidebar-nav li a:hover, .sidebar-nav li a.active { background: rgba(255,255,255,0.15); color: white; }
.sidebar-footer { position: absolute; bottom: 0; left: 0; right: 0; padding: 16px; border-top: 1px solid rgba(255,255,255,0.1); }
.sidebar-footer button { width: 100%; background: transparent; border: 1px solid rgba(255,255,255,0.2); color: rgba(255,255,255,0.7); padding: 8px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.sidebar-footer button:hover { background: rgba(255,255,255,0.1); }

.main-content { margin-left: var(--sidebar-width); flex: 1; min-width: 0; }
.page-header { padding: 20px 24px; border-bottom: 1px solid var(--border); background: var(--card); }
.page-header h1 { font-size: 22px; font-weight: 700; }
.page-header p { font-size: 13px; color: var(--muted); margin-top: 3px; }
.page-content { padding: 24px; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 16px; display: flex; align-items: center; gap: 14px; }
.stat-icon { width: 44px; height: 44px; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 20px; }
.stat-icon.blue { background: #dbeafe; color: #2563eb; }
.stat-icon.green { background: #dcfce7; color: #16a34a; }
.stat-icon.amber { background: #fef3c7; color: #d97706; }
.stat-icon.purple { background: #f3e8ff; color: #9333ea; }
.stat-value { font-size: 24px; font-weight: 700; }
.stat-label { font-size: 12px; color: var(--muted); }

.table-container { overflow-x: auto; }
table.data-table { width: 100%; border-collapse: collapse; }
table.data-table th, table.data-table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
table.data-table th { background: var(--bg); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); }
table.data-table tr:hover { background: var(--bg); }

.badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-secondary { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }

.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 1000; }
.modal { background: var(--card); border-radius: 12px; width: 90%; max-width: 500px; max-height: 90vh; overflow-y: auto; }
.modal-header { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-header h3 { font-size: 16px; }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--muted); padding: 4px; }
.modal-body { padding: 20px; }
.modal-footer { padding: 12px 20px; border-top: 1px solid var(--border); display: flex; gap: 8px; justify-content: flex-end; }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 11px; }
.text-muted { color: var(--muted); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.empty-state { text-align: center; padding: 48px 20px; color: var(--muted); }
.empty-state .icon { font-size: 40px; opacity: 0.3; margin-bottom: 12px; }

.toast { position: fixed; top: 20px; right: 20px; z-index: 9999; padding: 12px 20px; border-radius: 8px; font-size: 14px; animation: slideIn 0.3s ease; max-width: 400px; }
.toast-success { background: #166534; color: white; }
.toast-error { background: #991b1b; color: white; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

.trade-row { display: flex; align-items: center; justify-content: space-between; padding: 12px; border-radius: 6px; background: var(--bg); margin-bottom: 8px; }
.trade-info h4 { font-size: 14px; margin-bottom: 2px; }
.trade-info p { font-size: 12px; color: var(--muted); }

.report-card { display: flex; align-items: center; justify-content: space-between; padding: 14px; border: 1px solid var(--border); border-radius: 8px; background: var(--card); margin-bottom: 8px; }
.report-icon { width: 40px; height: 40px; border-radius: 8px; background: #dbeafe; color: #2563eb; display: flex; align-items: center; justify-content: center; margin-right: 12px; font-size: 18px; }

.group-header { font-size: 14px; font-weight: 600; color: var(--primary); margin-bottom: 8px; padding-bottom: 4px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 6px; }

.switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch .slider { position: absolute; cursor: pointer; inset: 0; background: #cbd5e1; transition: 0.3s; border-radius: 24px; }
.switch .slider:before { content: ''; position: absolute; height: 18px; width: 18px; left: 3px; bottom: 3px; background: white; transition: 0.3s; border-radius: 50%; }
.switch input:checked + .slider { background: var(--success); }
.switch input:checked + .slider:before { transform: translateX(20px); }

.hamburger { display: none; position: fixed; top: 10px; left: 10px; z-index: 200; background: var(--primary); color: white; border: none; padding: 8px 12px; border-radius: 6px; font-size: 18px; cursor: pointer; }

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .hamburger { display: block; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
}

.loading { display: flex; align-items: center; justify-content: center; padding: 60px; }
.spinner { width: 32px; height: 32px; border: 3px solid var(--border); border-top: 3px solid var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }