:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #3b82f6;
  --green: #22c55e;
  --red: #ef4444;
  --amber: #f59e0b;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
}

a { color: var(--accent); text-decoration: none; }

.topnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { font-weight: 700; font-size: 16px; }

.nav-links { display: flex; gap: 20px; }
.nav-links a { color: var(--muted); font-weight: 500; padding: 6px 2px; border-bottom: 2px solid transparent; }
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); border-bottom-color: var(--accent); }

.container { max-width: 1280px; margin: 0 auto; padding: 24px; }

h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 0 0 12px; color: var(--text); }
h3 { font-size: 13px; margin: 0 0 8px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.stat .value { font-size: 22px; font-weight: 600; }

.pos { color: var(--green); }
.neg { color: var(--red); }
.muted { color: var(--muted); }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; text-transform: uppercase; font-size: 11px; letter-spacing: .04em; }
tr:hover td { background: var(--panel-2); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}
.badge.buy, .badge.long { background: rgba(34,197,94,.15); color: var(--green); }
.badge.sell, .badge.short { background: rgba(239,68,68,.15); color: var(--red); }
.badge.neutral { background: rgba(139,148,158,.15); color: var(--muted); }

input, select, button, textarea {
  font-family: inherit;
  font-size: 13px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
}

input:focus, select:focus, textarea:focus { outline: 1px solid var(--accent); }

label { display: block; margin-bottom: 4px; color: var(--muted); font-size: 12px; }
.field { margin-bottom: 12px; }

button {
  cursor: pointer;
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  font-weight: 600;
}
button:hover { filter: brightness(1.1); }
button.secondary { background: var(--panel-2); border-color: var(--border); color: var(--text); }
button.danger { background: var(--red); border-color: var(--red); }
button:disabled { opacity: .5; cursor: not-allowed; }

.row { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }

.watchlist-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.watchlist-item:last-child { border-bottom: none; }

.symbol-input { text-transform: uppercase; }

.section { margin-bottom: 24px; }

.msg-banner {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 14px;
  font-size: 13px;
}
.msg-banner.warn { background: rgba(245,158,11,.12); color: var(--amber); border: 1px solid rgba(245,158,11,.3); }
.msg-banner.error { background: rgba(239,68,68,.12); color: var(--red); border: 1px solid rgba(239,68,68,.3); }
.msg-banner.ok { background: rgba(34,197,94,.12); color: var(--green); border: 1px solid rgba(34,197,94,.3); }

.chart-wrap { position: relative; height: 360px; }
.chart-wrap.small { height: 200px; }

.loading { color: var(--muted); font-style: italic; padding: 20px 0; }

.tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.tab-btn {
  background: transparent; border: none; color: var(--muted);
  padding: 10px 14px; border-radius: 0; border-bottom: 2px solid transparent;
}
.tab-btn.active { color: var(--text); border-bottom-color: var(--accent); }