* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background:
    radial-gradient(circle at top left, #123524, transparent 35%),
    radial-gradient(circle at top right, #1e293b, transparent 35%),
    #05070d;
  color: #fff;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 230px;
  padding: 24px;
  background: rgba(2, 6, 23, 0.92);
  border-right: 1px solid rgba(34,197,94,.25);
}

.sidebar h2 {
  color: #22c55e;
  margin-bottom: 0;
}

.sidebar p {
  color: #94a3b8;
}

.sidebar button {
  width: 100%;
  margin: 8px 0;
  padding: 13px;
  border: 0;
  border-radius: 12px;
  background: rgba(15, 23, 42, .9);
  color: #fff;
  text-align: left;
}

main {
  flex: 1;
  padding: 24px;
}

.topbar, .cards, .trade-grid {
  display: grid;
  gap: 18px;
}

.topbar {
  grid-template-columns: 1fr 180px;
  align-items: center;
}

.card, .chart-card, .order-card {
  background: rgba(15, 23, 42, .92);
  border: 1px solid rgba(34, 197, 94, .28);
  border-radius: 20px;
  padding: 18px;
  box-shadow: 0 22px 60px rgba(0,0,0,.35);
}

.cards {
  grid-template-columns: repeat(4, 1fr);
  margin: 20px 0;
}

.card span {
  color: #94a3b8;
}

.card h3 {
  color: #22c55e;
}

.trade-grid {
  grid-template-columns: 2fr 360px;
}

#tradingview_chart {
  height: 520px;
}

input, select {
  width: 100%;
  margin: 8px 0;
  padding: 13px;
  border-radius: 12px;
  border: 1px solid rgba(148,163,184,.25);
  background: #020617;
  color: #fff;
}

button {
  cursor: pointer;
  padding: 13px 18px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #03130a;
  font-weight: 800;
}

#signals div {
  padding: 12px;
  margin: 8px 0;
  border-radius: 12px;
  background: rgba(34,197,94,.1);
  border: 1px solid rgba(34,197,94,.25);
}

@media(max-width: 900px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; }
  .cards, .trade-grid, .topbar { grid-template-columns: 1fr; }
}