:root {
  --bg: #0b0e14;
  --bg-2: #131722;
  --bg-3: #1b2130;
  --border: #262c3a;
  --text: #d6dae2;
  --muted: #7c8598;
  --accent: #3b82f6;
  --green: #26a69a;
  --red: #ef5350;
  --amber: #f5a623;
  --mono: 'SFMono-Regular', ui-monospace, 'JetBrains Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
}
.hidden { display: none !important; }
.muted { color: var(--muted); font-weight: 400; }
.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--mono); }
.pos { color: var(--green); }
.neg { color: var(--red); }
h2 { font-size: 15px; font-weight: 600; margin: 18px 0 10px; }

/* ---- Login ---- */
.login-gate {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: var(--bg);
}
.login-card {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px;
  padding: 32px; width: 320px; display: flex; flex-direction: column; gap: 12px;
}
.login-card h1 { font-size: 20px; margin: 0; }
.login-card input {
  background: var(--bg-3); border: 1px solid var(--border); color: var(--text);
  padding: 10px 12px; border-radius: 8px; font-size: 14px;
}
.login-card button {
  background: var(--accent); color: #fff; border: none; padding: 10px; border-radius: 8px;
  font-weight: 600; cursor: pointer;
}
.error { color: var(--red); font-size: 13px; }

/* ---- Top bar ---- */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px; background: var(--bg-2); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; display: flex; align-items: center; gap: 8px; letter-spacing: .3px; }
.brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }
.readonly-badge {
  font-size: 10px; font-weight: 700; letter-spacing: .8px; color: var(--amber);
  border: 1px solid var(--amber); border-radius: 4px; padding: 2px 6px; margin-left: 6px;
}
.controls { display: flex; align-items: center; gap: 14px; }
.refresh-status { font-size: 12px; color: var(--muted); font-family: var(--mono); }

.acct-toggle { display: inline-flex; background: var(--bg-3); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.acct-toggle button {
  background: transparent; color: var(--muted); border: none; padding: 6px 16px;
  cursor: pointer; font-size: 13px; font-weight: 600;
}
.acct-toggle button.active { background: var(--accent); color: #fff; }
.acct-toggle button.live.active { background: var(--red); }
.acct-toggle button:disabled { opacity: .35; cursor: not-allowed; }

button.ghost {
  background: var(--bg-3); color: var(--text); border: 1px solid var(--border);
  padding: 7px 12px; border-radius: 8px; cursor: pointer; font-size: 13px;
}
button.primary { background: var(--accent); color: #fff; border: none; padding: 9px 16px; border-radius: 8px; cursor: pointer; font-weight: 600; }
button.ghost:hover { border-color: var(--accent); }

/* ---- Tabs ---- */
.tabs { display: flex; gap: 2px; padding: 0 16px; background: var(--bg-2); border-bottom: 1px solid var(--border); overflow-x: auto; }
.tab {
  background: transparent; border: none; color: var(--muted); padding: 12px 16px;
  cursor: pointer; font-size: 13px; font-weight: 600; border-bottom: 2px solid transparent;
}
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

main { padding: 18px 20px 60px; max-width: 1500px; margin: 0 auto; }
.panel { display: none; }
.panel.active { display: block; }
.panel-head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }

/* ---- Stat tiles ---- */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-top: 6px; }
.stat {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px;
}
.stat .label { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .6px; }
.stat .value { font-size: 22px; font-weight: 700; font-family: var(--mono); margin-top: 4px; }
.stat .sub { font-size: 12px; margin-top: 2px; font-family: var(--mono); }

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: var(--bg-2); color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .5px; position: sticky; top: 0; }
tbody tr:hover { background: var(--bg-3); }
tbody tr:last-child td { border-bottom: none; }
td.num.pos, td.num.neg { font-weight: 600; }
.empty { color: var(--muted); padding: 16px 0; }

/* ---- Option cards ---- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 14px; }
.opt-card { background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.opt-card .oc-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 10px; }
.opt-card .oc-sym { font-size: 17px; font-weight: 700; }
.opt-card .oc-type { font-size: 11px; text-transform: uppercase; letter-spacing: .6px; padding: 2px 7px; border-radius: 5px; }
.oc-type.put { background: rgba(239,83,80,.15); color: var(--red); }
.oc-type.call { background: rgba(38,166,154,.15); color: var(--green); }
.oc-legs { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.greek-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 10px 0; }
.greek { background: var(--bg-3); border-radius: 8px; padding: 7px; text-align: center; }
.greek .g-label { font-size: 10px; color: var(--muted); text-transform: uppercase; }
.greek .g-val { font-family: var(--mono); font-size: 14px; font-weight: 600; }
.oc-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 12px; font-size: 12px; margin-top: 8px; }
.oc-meta span { color: var(--muted); }
.oc-meta b { font-family: var(--mono); font-weight: 600; }
.dte-badge { font-family: var(--mono); }
.dte-warn { color: var(--amber); }
.dte-danger { color: var(--red); }

/* ---- Volatility ---- */
.watchlist-edit { display: flex; gap: 6px; }
.watchlist-edit input { background: var(--bg-3); border: 1px solid var(--border); color: var(--text); padding: 7px 10px; border-radius: 8px; width: 280px; }
tr.elevated { background: rgba(245,166,35,.08); }
tr.elevated td:first-child::after { content: " ▲"; color: var(--amber); }
.spark { width: 160px; height: 34px; }
.rank-bar { display: inline-block; width: 60px; height: 8px; background: var(--bg-3); border-radius: 4px; overflow: hidden; vertical-align: middle; margin-left: 6px; }
.rank-bar > i { display: block; height: 100%; background: var(--accent); }

/* ---- Analyzer ---- */
.analyzer-grid { display: grid; grid-template-columns: 340px 1fr; gap: 18px; }
.analyzer-form { background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.analyzer-form label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.analyzer-form input, .analyzer-form select { background: var(--bg-3); border: 1px solid var(--border); color: var(--text); padding: 8px 10px; border-radius: 8px; font-size: 14px; }
.leg-row { display: grid; grid-template-columns: 1fr 1fr 1.2fr 0.7fr auto; gap: 6px; align-items: end; }
.leg-row button { background: transparent; border: none; color: var(--red); cursor: pointer; font-size: 16px; }
.an-overrides { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.analyzer-out { background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; padding: 18px; min-height: 320px; }
.an-metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; margin-bottom: 16px; }
.an-metric { background: var(--bg-3); border-radius: 8px; padding: 10px 12px; }
.an-metric .m-label { font-size: 10px; text-transform: uppercase; color: var(--muted); letter-spacing: .5px; }
.an-metric .m-val { font-family: var(--mono); font-size: 18px; font-weight: 700; margin-top: 2px; }

/* ---- Charts ---- */
.chart-controls, .chart-controls input { display: inline-flex; }
.chart-controls input { background: var(--bg-3); border: 1px solid var(--border); color: var(--text); padding: 7px 10px; border-radius: 8px; margin-right: 6px; width: 120px; }
.tv-advanced { height: 620px; margin-top: 12px; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }

/* ---- Alerts ---- */
.webhook-hint { font-family: var(--mono); font-size: 12px; background: var(--bg-2); border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; word-break: break-all; }
.alerts-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.alert-item { background: var(--bg-2); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 8px; padding: 10px 14px; }
.alert-item.new { animation: flash 1.2s ease; }
@keyframes flash { from { background: rgba(59,130,246,.25); } to { background: var(--bg-2); } }
.alert-item .a-time { font-size: 11px; color: var(--muted); font-family: var(--mono); }
.alert-item pre { margin: 6px 0 0; font-family: var(--mono); font-size: 12px; white-space: pre-wrap; word-break: break-word; color: var(--text); }

@media (max-width: 820px) {
  .analyzer-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}