/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0d1117;
  --surface:  #161b22;
  --border:   #30363d;
  --text:     #e6edf3;
  --muted:    #8b949e;
  --accent:   #58a6ff;
  --green:    #3fb950;
  --red:      #f85149;
  --yellow:   #d29922;
  --purple:   #bc8cff;
  --orange:   #ffa657;

  /* per-symbol palette (cycled) */
  --sym0: #58a6ff;
  --sym1: #3fb950;
  --sym2: #ffa657;
  --sym3: #bc8cff;
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
  min-height: 100vh;
}

a { color: var(--accent); }

/* ===== LAYOUT ===== */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 100;
}

header h1 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--accent);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
  border: 1px solid transparent;
}
.status-pill.connecting { border-color: var(--yellow); color: var(--yellow); }
.status-pill.live       { border-color: var(--green);  color: var(--green);  }
.status-pill.replay     { border-color: var(--purple); color: var(--purple); }
.status-pill.error      { border-color: var(--red);    color: var(--red);    }

.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.dot.blink { animation: blink 1.2s step-end infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.2} }

.mode-badge {
  margin-left: auto;
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

main {
  flex: 1;
  padding: 16px 20px;
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
  grid-template-areas:
    "sym-cards"
    "price-chart"
    "bottom-row";
}

@media (min-width: 1100px) {
  main {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "sym-cards   sym-cards"
      "price-chart price-chart"
      "fills-table lat-panel";
  }
}

/* ===== PANELS ===== */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}

.panel-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

/* ===== SYMBOL CARDS ===== */
#sym-cards {
  grid-area: sym-cards;
}

.cards-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.sym-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  min-width: 200px;
  flex: 1;
  border-left-width: 3px;
}

.sym-card .sym-name {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.sym-card .stat-grid {
  display: grid;
  grid-template-columns: auto auto;
  gap: 4px 16px;
}

.sym-card .stat-label { color: var(--muted); font-size: 11px; }
.sym-card .stat-val   { font-size: 12px; text-align: right; }
.sym-card .mid-val    { font-size: 17px; font-weight: 700; margin-bottom: 8px; }

/* ===== PRICE CHART ===== */
#price-chart-panel {
  grid-area: price-chart;
}

#chart-container {
  width: 100%;
  height: 260px;
  position: relative;
}

#price-chart-canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 260px;
  color: var(--muted);
  font-size: 12px;
  border: 1px dashed var(--border);
  border-radius: 4px;
}

/* chart legend */
#chart-legend {
  display: flex;
  gap: 14px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: var(--muted);
}
.legend-dot { width:8px; height:8px; border-radius:50%; }

/* ===== FILLS TABLE ===== */
#fills-table-panel {
  grid-area: fills-table;
}

.fills-wrap {
  overflow-y: auto;
  max-height: 280px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
thead th {
  position: sticky;
  top: 0;
  background: var(--surface);
  color: var(--muted);
  font-weight: 600;
  text-align: right;
  padding: 4px 8px;
  letter-spacing: 0.3px;
  white-space: nowrap;
}
thead th:first-child { text-align: left; }

tbody tr {
  border-top: 1px solid var(--border);
  transition: background 0.15s;
}
tbody tr:hover { background: rgba(255,255,255,0.03); }
tbody td {
  padding: 5px 8px;
  text-align: right;
  color: var(--text);
  white-space: nowrap;
}
tbody td:first-child { text-align: left; }

.side-buy  { color: var(--green);  font-weight: 700; }
.side-sell { color: var(--red);    font-weight: 700; }
.sym-label { font-size: 10px; font-weight: 600; padding: 1px 5px; border-radius: 3px; }

/* ===== LATENCY PANEL ===== */
#lat-panel {
  grid-area: lat-panel;
}

.lat-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 14px;
}

.lat-stat { text-align: center; }
.lat-stat .ls-label { font-size: 10px; color: var(--muted); margin-bottom: 3px; }
.lat-stat .ls-val   { font-size: 16px; font-weight: 700; color: var(--accent); }

#lat-hist-container {
  height: 130px;
  position: relative;
}
#lat-hist-canvas {
  width: 100% !important;
  height: 100% !important;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ===== EMPTY STATE ===== */
.empty-state {
  color: var(--muted);
  text-align: center;
  padding: 24px;
  font-size: 12px;
}

/* ===== GRID AREA wrappers for bottom row ===== */
@media (max-width: 1099px) {
  #fills-table-panel { grid-area: auto; }
  #lat-panel         { grid-area: auto; }
}