:root {
    --bg: #0a0e17; --bg2: #111827; --bg3: #1a2332;
    --border: #1e2d3d; --text: #e2e8f0; --text2: #94a3b8;
    --green: #10b981; --red: #ef4444; --blue: #3b82f6;
    --gold: #f59e0b; --purple: #8b5cf6;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--blue); text-decoration: none; }

/* Login */
.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg, #0a0e17 0%, #1a1a2e 100%); }
.login-box { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 40px; width: 380px; }
.login-box h1 { font-size: 22px; margin-bottom: 6px; }
.login-box p { color: var(--text2); font-size: 13px; margin-bottom: 24px; }
.login-box input { width: 100%; padding: 10px 14px; background: var(--bg3); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 14px; margin-bottom: 14px; outline: none; }
.login-box input:focus { border-color: var(--blue); }
.login-box button { width: 100%; padding: 11px; background: var(--blue); color: #fff; border: none; border-radius: 6px; font-size: 14px; cursor: pointer; font-weight: 600; }
.login-box button:hover { opacity: 0.9; }
.login-error { color: var(--red); font-size: 13px; margin-bottom: 10px; }
.login-logo { font-size: 28px; font-weight: 700; background: linear-gradient(90deg, var(--green), var(--blue)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 4px; }

/* Layout */
.shell { display: flex; height: 100vh; }
.sidebar { width: 220px; background: var(--bg2); border-right: 1px solid var(--border); display: flex; flex-direction: column; flex-shrink: 0; }
.sidebar .logo { padding: 20px; font-size: 16px; font-weight: 700; border-bottom: 1px solid var(--border); }
.sidebar nav { flex: 1; padding: 10px 0; }
.sidebar nav a { display: flex; align-items: center; gap: 10px; padding: 10px 20px; color: var(--text2); font-size: 13px; transition: all 0.15s; }
.sidebar nav a:hover, .sidebar nav a.active { color: var(--text); background: var(--bg3); }
.sidebar nav a.active { border-left: 3px solid var(--blue); }
.sidebar .user-info { padding: 14px 20px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text2); }
.sidebar .user-info span { color: var(--text); font-weight: 600; }
.main { flex: 1; overflow-y: auto; padding: 24px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; padding: 18px; }
.card .label { font-size: 11px; color: var(--text2); text-transform: uppercase; letter-spacing: 0.5px; }
.card .value { font-size: 26px; font-weight: 700; margin-top: 4px; }
.card .sub { font-size: 12px; color: var(--text2); margin-top: 2px; }
.card.green .value { color: var(--green); }
.card.red .value { color: var(--red); }
.card.blue .value { color: var(--blue); }
.card.gold .value { color: var(--gold); }

/* Signal badge */
.signal { display: inline-block; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.signal.buy { background: rgba(16,185,129,0.15); color: var(--green); }
.signal.sell { background: rgba(239,68,68,0.15); color: var(--red); }
.signal.neutral { background: rgba(148,163,184,0.15); color: var(--text2); }

/* Tables */
.table-wrap { background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; margin-bottom: 24px; }
.table-wrap h3 { padding: 14px 18px; font-size: 14px; border-bottom: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; padding: 10px 14px; color: var(--text2); font-weight: 500; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); }
td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr:hover { background: var(--bg3); }
.pnl-pos { color: var(--green); font-weight: 600; }
.pnl-neg { color: var(--red); font-weight: 600; }

/* Buttons */
.btn { padding: 8px 16px; border-radius: 6px; border: none; font-size: 13px; cursor: pointer; font-weight: 500; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-success { background: var(--green); color: #fff; }
.btn-danger { background: var(--red); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn:hover { opacity: 0.85; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* Forms */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 12px; color: var(--text2); margin-bottom: 4px; }
.form-group input, .form-group select { width: 100%; padding: 8px 12px; background: var(--bg3); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 13px; }
.form-row { display: flex; gap: 14px; }
.form-row .form-group { flex: 1; }

/* Toggle */
.toggle { position: relative; width: 44px; height: 24px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle .slider { position: absolute; inset: 0; background: var(--bg3); border-radius: 24px; cursor: pointer; transition: 0.2s; border: 1px solid var(--border); }
.toggle .slider:before { content: ''; position: absolute; height: 18px; width: 18px; left: 2px; bottom: 2px; background: var(--text2); border-radius: 50%; transition: 0.2s; }
.toggle input:checked + .slider { background: var(--green); border-color: var(--green); }
.toggle input:checked + .slider:before { transform: translateX(20px); background: #fff; }

/* Logs */
.log-entry { padding: 8px 14px; font-family: 'Consolas', monospace; font-size: 12px; border-bottom: 1px solid var(--border); }
.log-entry .ts { color: var(--text2); }
.log-entry.error { border-left: 3px solid var(--red); }
.log-entry.warn { border-left: 3px solid var(--gold); }
.log-entry.info { border-left: 3px solid var(--blue); }
.log-entry.success { border-left: 3px solid var(--green); }

/* Chart placeholder */
.chart-area { background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; height: 350px; display: flex; align-items: center; justify-content: center; margin-bottom: 24px; position: relative; overflow: hidden; }

/* Page header */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.page-header h2 { font-size: 20px; }

/* Status dot */
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.dot.green { background: var(--green); }
.dot.red { background: var(--red); }
.dot.yellow { background: var(--gold); }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { width: 60px; }
    .sidebar nav a span { display: none; }
    .sidebar .logo { font-size: 12px; padding: 14px; }
    .cards { grid-template-columns: 1fr 1fr; }
}