:root {
    --bg: #0d1117;
    --surface: #161b22;
    --border: #30363d;
    --text: #c9d1d9;
    --text-dim: #8b949e;
    --text-bright: #f0f6fc;
    --green: #3fb950;
    --red: #f85149;
    --yellow: #d29922;
    --blue: #58a6ff;
    --cyan: #39d2c0;
    --font: 'SF Mono','Fira Code','Cascadia Code','Consolas',monospace;
    --radius: 6px;
    --pad: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    line-height: 1.4;
    min-height: 100vh;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 14px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-left { display: flex; align-items: center; gap: 10px; }
header h1 { font-size: 16px; font-weight: 700; letter-spacing: 3px; color: var(--cyan); }
.header-right { font-size: 12px; color: var(--text-dim); }

/* Badges */
.badge { font-size: 10px; font-weight: 700; padding: 2px 6px; border-radius: 3px; letter-spacing: 1px; }
.badge-paper { background: var(--yellow); color: #000; }
.badge-live { background: var(--green); color: #000; }
.badge-online { background: var(--green); color: #000; }
.badge-offline { background: var(--red); color: #fff; }

/* Status Bar */
.status-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 6px 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 12px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}
.status-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    display: inline-block;
    background: var(--red);
}
.status-dot.connected { background: var(--green); }
.sep { width: 1px; height: 14px; background: var(--border); }

/* Main */
main { padding: var(--pad); max-width: 1400px; margin: 0 auto; }

/* Grid */
.grid { display: grid; gap: 10px; margin-bottom: 10px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1fr; }
.grid-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }

/* Cards/Panels */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--pad);
}
.card-wide { margin-bottom: 10px; }
.card h2 {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 8px;
}

/* P&L Display */
.pnl-display {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    padding: 4px 0;
}
.pnl-positive { color: var(--green); }
.pnl-negative { color: var(--red); }
.pnl-zero { color: var(--text-dim); }

.progress-bar-container {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin: 6px 0;
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background: var(--green);
    border-radius: 2px;
    transition: width 0.5s ease;
    width: 0%;
}
.progress-bar.over-target { background: var(--cyan); }

.pnl-sub {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-dim);
    margin-bottom: 8px;
}

/* Metrics Row */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    text-align: center;
}
.metrics-row div { display: flex; flex-direction: column; }
.metrics-row .label { font-size: 9px; color: var(--text-dim); text-transform: uppercase; }
.metrics-row span:not(.label) { font-size: 12px; font-weight: 600; }

/* Row (label/value pair) */
.row {
    display: flex;
    justify-content: space-between;
    padding: 3px 0;
    font-size: 12px;
}
.row .label { color: var(--text-dim); }

/* Forms */
.form-group { margin-bottom: 8px; }
.form-group label { display: block; font-size: 11px; color: var(--text-dim); margin-bottom: 3px; }
.form-group input[type="number"] {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    width: 80px;
    font-family: var(--font);
}
.form-group input[type="checkbox"] { margin-right: 4px; }
.form-inline { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }

/* Buttons */
.btn {
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    background: transparent;
    color: var(--text);
    font-family: var(--font);
    transition: background 0.15s, opacity 0.15s;
}
.btn:hover { background: var(--border); }
.btn:active { opacity: 0.7; }
.btn-sm { padding: 3px 8px; font-size: 11px; }

.toggle-group { display: flex; gap: 4px; }
.btn-toggle { background: transparent; color: var(--text-dim); padding: 5px 14px; }
.btn-toggle.active { background: var(--blue); color: #fff; border-color: var(--blue); }

.engine-controls { display: flex; gap: 6px; margin-bottom: 8px; }
.btn-start { background: var(--green); color: #000; border-color: var(--green); flex: 1; padding: 8px; font-size: 12px; }
.btn-stop { flex: 1; padding: 8px; font-size: 12px; }
.btn-flatten {
    background: transparent; color: var(--red); border-color: var(--red);
    padding: 8px; font-size: 12px; letter-spacing: 1px;
}
.btn-flatten:hover { background: var(--red); color: #fff; }

.engine-info { display: flex; flex-direction: column; gap: 4px; }
.engine-info div { display: flex; justify-content: space-between; font-size: 12px; }
.engine-info .label { color: var(--text-dim); }

/* Tables */
.table-controls { display: flex; gap: 4px; margin-bottom: 6px; }
.table-wrap { max-height: 260px; overflow-y: auto; }

table { width: 100%; border-collapse: collapse; font-size: 11px; }
th {
    text-align: left; padding: 4px 6px;
    border-bottom: 1px solid var(--border);
    color: var(--text-dim); font-weight: 600;
    text-transform: uppercase; font-size: 10px;
    letter-spacing: 0.5px; position: sticky;
    top: 0; background: var(--surface);
}
td {
    padding: 3px 6px;
    border-bottom: 1px solid rgba(48,54,61,0.5);
    font-size: 11px;
}
tr:hover td { background: rgba(48,54,61,0.4); }
.td-positive { color: var(--green); }
.td-negative { color: var(--red); }

/* Signal Log */
.signal-log { max-height: 260px; overflow-y: auto; font-size: 11px; line-height: 1.5; }
.signal-log .sig-line { padding: 2px 0; border-bottom: 1px solid rgba(48,54,61,0.3); }
.sig-buy { color: var(--green); }
.sig-sell { color: var(--red); }
.sig-hold { color: var(--yellow); }
.sig-flatten { color: var(--cyan); }

/* Stats Grid */
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.stat-item {
    display: flex; justify-content: space-between;
    padding: 3px 0; font-size: 12px;
    border-bottom: 1px solid rgba(48,54,61,0.5);
}
.stat-item .label { color: var(--text-dim); }
.stat-item .value { font-weight: 600; }

/* Direction bars */
.direction-bars { padding: 4px 0; }
.dir-row { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.dir-label { width: 44px; font-size: 11px; font-weight: 600; color: var(--text-dim); }
.dir-bar-bg { flex: 1; height: 16px; background: var(--border); border-radius: 3px; overflow: hidden; }
.dir-bar { height: 100%; border-radius: 3px; transition: width 0.5s ease; }
.dir-long { background: var(--green); }
.dir-short { background: var(--red); }
.dir-count { width: 28px; text-align: right; font-size: 12px; }

/* Equity Chart */
#equity-chart { width: 100%; background: var(--bg); border-radius: 4px; }

/* Trail status */
.trail-status { font-size: 11px; color: var(--text-dim); margin-top: 3px; }
.trail-active { color: var(--yellow); }
.trail-halted { color: var(--red); }

/* Bottom bar */
.bottom-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 8px var(--pad);
    margin-top: 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Responsive — Tablet */
@media (max-width: 768px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: 1fr 1fr; }
    main { padding: 8px; }
    .card { padding: 8px; }
    .btn { padding: 10px 16px; min-height: 44px; }
    .btn-sm { min-height: auto; padding: 6px 10px; }
    .status-bar { gap: 8px; font-size: 11px; }
    .sep { display: none; }
    .form-group input[type="number"] { font-size: 16px; width: 90px; }
    .bottom-bar { flex-direction: column; gap: 8px; }
    .btn-flatten { width: 100%; }
    header h1 { font-size: 14px; }
}

/* Responsive — Phone */
@media (max-width: 400px) {
    .grid-4 { grid-template-columns: 1fr; }
    main { padding: 6px; }
    .card { padding: 6px; }
    .pnl-display { font-size: 20px; }
    .status-bar { flex-direction: column; align-items: flex-start; gap: 4px; padding: 6px; }
    .engine-controls { flex-direction: column; }
}