:root{--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-tertiary: #f1f5f9;--bg-card: #ffffff;--bg-card-hover: #f8fafc;--bg-input: #ffffff;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--buy-primary: #10b981;--buy-secondary: #d1fae5;--sell-primary: #ef4444;--sell-secondary: #fee2e2;--accent-blue: #3b82f6;--accent-blue-light: #eff6ff;--accent-purple: #8b5cf6;--accent-amber: #f59e0b;--border-primary: #e2e8f0;--border-secondary: #f1f5f9;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;--transition-fast: .15s ease}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.5;min-height:100vh}a{color:var(--accent-blue);text-decoration:none}a:hover{text-decoration:underline}.app-container{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--bg-secondary);border-right:1px solid var(--border-primary);padding:24px 0;display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:50}.sidebar-logo{padding:0 24px 24px;border-bottom:1px solid var(--border-primary);margin-bottom:16px}.sidebar-logo h1{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--accent-blue),var(--accent-purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.sidebar-logo span{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px}.sidebar-nav{flex:1;padding:0 12px}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 16px;border-radius:var(--radius-md);color:var(--text-secondary);font-size:.9rem;font-weight:500;border:none;background:none;width:100%;text-align:left;cursor:pointer;transition:all var(--transition-fast)}.nav-item:hover{background:var(--bg-tertiary);color:var(--text-primary)}.nav-item.active{background:var(--accent-blue-light);color:var(--accent-blue);font-weight:600}.nav-icon{font-size:1.1rem}.sidebar-footer{padding:16px 12px;border-top:1px solid var(--border-primary)}.main-content{flex:1;margin-left:240px;padding:32px 40px;background:var(--bg-primary)}.card{background:var(--bg-card);border:1px solid var(--border-primary);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);transition:box-shadow var(--transition-fast)}.card:hover{box-shadow:var(--shadow-md)}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.card-title{font-size:1.1rem;font-weight:700;color:var(--text-primary);display:flex;align-items:center;gap:8px}.card-title .icon{font-size:1.2rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:32px}.stat-card{background:var(--bg-card);border:1px solid var(--border-primary);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);border-top:3px solid var(--accent-blue)}.stat-card.stat-positive{border-top-color:var(--buy-primary)}.stat-card.stat-negative{border-top-color:var(--sell-primary)}.stat-card.stat-warning{border-top-color:var(--accent-amber)}.stat-label{font-size:.8rem;font-weight:600;text-transform:uppercase;color:var(--text-muted);margin-bottom:8px;letter-spacing:.5px}.stat-value{font-size:1.75rem;font-weight:800;color:var(--text-primary)}.stat-value.positive{color:var(--buy-primary)}.stat-value.negative{color:var(--sell-primary)}.orderbook-container{display:grid;grid-template-columns:1fr 1fr;gap:4px}.orderbook-side{padding:0}.orderbook-header{display:grid;grid-template-columns:1fr 1fr 1fr;padding:8px 12px;font-size:.75rem;font-weight:600;text-transform:uppercase;color:var(--text-secondary);border-bottom:2px solid var(--border-secondary)}@keyframes flashRow{0%{background-color:var(--accent-blue-light)}to{background-color:transparent}}.orderbook-row{display:grid;grid-template-columns:1fr 1fr 1fr;padding:6px 12px;font-size:.85rem;font-family:var(--font-mono);position:relative;animation:flashRow .5s ease-out}.orderbook-row .depth-bar{position:absolute;top:0;bottom:0;opacity:.15;z-index:0;border-radius:2px}.orderbook-row .depth-bar.buy{right:0;background:var(--buy-primary)}.orderbook-row .depth-bar.sell{left:0;background:var(--sell-primary)}.orderbook-row span{position:relative;z-index:1}.price-buy{color:var(--buy-primary);font-weight:600}.price-sell{color:var(--sell-primary);font-weight:600}.form-group{margin-bottom:16px}.form-label{display:block;font-size:.85rem;font-weight:600;color:var(--text-secondary);margin-bottom:8px}.form-input{width:100%;padding:10px 14px;background:var(--bg-input);border:1px solid var(--border-primary);border-radius:var(--radius-md);color:var(--text-primary);font-size:.95rem;transition:border-color var(--transition-fast)}.form-input:focus{border-color:var(--accent-blue);outline:none;box-shadow:0 0 0 3px var(--accent-blue-light)}.btn{padding:10px 20px;border-radius:var(--radius-md);font-weight:600;font-size:.9rem;cursor:pointer;border:none;font-family:var(--font-sans);transition:all var(--transition-fast)}.btn-buy{background:var(--buy-primary);color:#fff}.btn-buy:hover{background:#059669}.btn-sell{background:var(--sell-primary);color:#fff}.btn-sell:hover{background:#dc2626}.btn-primary{background:var(--accent-blue);color:#fff}.btn-primary:hover{background:#2563eb}.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border-primary)}.btn-ghost:hover{background:var(--bg-tertiary);color:var(--text-primary)}.btn-sm{padding:6px 12px;font-size:.8rem}.btn-full{width:100%}.btn:disabled{opacity:.6;cursor:not-allowed}.side-toggle{display:grid;grid-template-columns:1fr 1fr;gap:4px;background:var(--bg-tertiary);border-radius:var(--radius-md);padding:4px;margin-bottom:20px}.side-toggle button{padding:8px;border:none;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;cursor:pointer;background:transparent;color:var(--text-muted);transition:all var(--transition-fast)}.side-toggle button.active-buy{background:#fff;color:var(--buy-primary);box-shadow:var(--shadow-sm)}.side-toggle button.active-sell{background:#fff;color:var(--sell-primary);box-shadow:var(--shadow-sm)}.table-container{overflow-x:auto}table{width:100%;border-collapse:collapse}th{padding:12px;text-align:left;font-size:.85rem;font-weight:600;color:var(--text-secondary);border-bottom:2px solid var(--border-secondary)}td{padding:12px;font-size:.9rem;border-bottom:1px solid var(--border-secondary)}.badge{padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600;display:inline-flex;align-items:center;gap:4px}.badge-buy{background:var(--buy-secondary);color:var(--buy-primary)}.badge-sell{background:var(--sell-secondary);color:var(--sell-primary)}.badge-pending{background:#fef3c7;color:var(--accent-amber)}.badge-filled{background:var(--buy-secondary);color:var(--buy-primary)}.badge-cancelled{background:var(--bg-tertiary);color:var(--text-muted)}.badge-partial{background:var(--accent-blue-light);color:var(--accent-blue)}.auth-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:var(--bg-secondary)}.auth-card{width:100%;max-width:420px;background:var(--bg-card);border:1px solid var(--border-primary);border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow-md)}.auth-card h1{font-size:1.75rem;font-weight:800;background:linear-gradient(135deg,var(--accent-blue),var(--accent-purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-align:center;margin-bottom:8px}.auth-card .subtitle{text-align:center;color:var(--text-muted);font-size:.9rem;margin-bottom:32px}.auth-error{padding:12px 16px;background:var(--sell-secondary);border:1px solid #fecaca;border-radius:var(--radius-md);color:var(--sell-primary);font-size:.9rem;font-weight:500;margin-bottom:20px}.auth-switch{text-align:center;margin-top:24px;color:var(--text-muted);font-size:.9rem}.auth-switch a{color:var(--accent-blue);font-weight:600}.trading-grid{display:grid;grid-template-columns:1fr 340px;gap:24px}.trading-main,.trading-sidebar{display:flex;flex-direction:column;gap:24px}.trade-row{display:flex;justify-content:space-between;padding:8px 0;font-size:.9rem;border-bottom:1px solid var(--border-secondary);animation:flashRow .5s ease-out}.trade-row:last-child{border-bottom:none}.page-header{margin-bottom:32px}.page-header h2{font-size:1.5rem;font-weight:800;color:var(--text-primary)}.page-header p{color:var(--text-secondary);font-size:.95rem;margin-top:4px}.toast{position:fixed;bottom:24px;right:24px;padding:14px 20px;background:var(--bg-card);border:1px solid var(--border-primary);border-radius:var(--radius-md);box-shadow:var(--shadow-md);z-index:1000;font-weight:500}.toast.success{border-left:4px solid var(--buy-primary)}.toast.error{border-left:4px solid var(--sell-primary)}.empty-state{text-align:center;padding:40px 20px;color:var(--text-muted)}.empty-state .icon{font-size:2rem;margin-bottom:12px;color:var(--border-primary)}.pulse{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--buy-primary);margin-left:8px}.spinner{width:32px;height:32px;border:3px solid var(--border-secondary);border-top-color:var(--accent-blue);border-radius:50%;animation:spin .8s linear infinite;margin:40px auto}@keyframes spin{to{transform:rotate(360deg)}}