:root{--bg: #0d1117;--panel: #161b22;--panel-2: #1c2230;--border: #2a3142;--text: #e6edf3;--muted: #8a94a6;--accent: #4c8bf5;--buy: #2ecc71;--sell: #ff5d5d;--warn: #f0b429}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.center{min-height:100vh;display:grid;place-items:center}.app{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{background:var(--panel);border-right:1px solid var(--border);padding:20px;display:flex;flex-direction:column}.brand{font-size:20px;line-height:1.1;margin:0 0 24px;color:var(--accent)}.sidebar nav{display:flex;flex-direction:column;gap:4px;flex:1}.sidebar nav a{color:var(--muted);text-decoration:none;padding:10px 12px;border-radius:8px}.sidebar nav a:hover{background:var(--panel-2);color:var(--text)}.sidebar nav a.active{background:var(--accent);color:#fff}.sidebar-footer{display:flex;flex-direction:column;gap:8px}.sidebar-footer .user{font-size:12px;color:var(--muted);word-break:break-all}.content{padding:20px 28px}.topbar{display:flex;justify-content:flex-end;margin-bottom:8px}.mode-badge{font-size:12px;padding:4px 10px;border-radius:999px;background:var(--panel-2);border:1px solid var(--border)}.mode-paper{color:var(--accent)}.mode-live{color:var(--sell);border-color:var(--sell)}.mode-simulation{color:var(--muted)}.disclaimer{background:#f0b4291a;border:1px solid var(--warn);color:var(--warn);padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:20px}.page-head{display:flex;justify-content:space-between;align-items:center}button{background:var(--accent);color:#fff;border:none;padding:9px 16px;border-radius:8px;cursor:pointer;font-size:14px}button:disabled{opacity:.5;cursor:not-allowed}button.small{padding:4px 10px;font-size:12px}input{background:var(--bg);border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:8px;width:100%}.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:16px}.card.login{width:340px;display:flex;flex-direction:column;gap:12px}.card.summary{white-space:pre-wrap;font-size:14px;color:var(--text)}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}.stat{display:flex;flex-direction:column;gap:6px}.stat-label{font-size:12px;color:var(--muted)}.stat-value{font-size:22px;font-weight:600}table.data{width:100%;border-collapse:collapse;font-size:14px}table.data th,table.data td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border)}table.data th{color:var(--muted);font-weight:500}.buy{color:var(--buy)}.sell{color:var(--sell)}.muted{color:var(--muted)}.error{color:var(--sell);background:#ff5d5d1a;padding:8px 12px;border-radius:8px}.fineprint{font-size:11px;color:var(--muted)}h2,h3{font-weight:600}