:root {
  color-scheme: light dark;
  --bg: #f6f8fb;
  --panel: #ffffff;
  --panel-2: #f1f4f9;
  --text: #172033;
  --muted: #67728a;
  --line: #dfe5ee;
  --accent: #0f766e;
  --accent-soft: rgba(15, 118, 110, 0.12);
  --warn: #d97706;
  --warn-soft: rgba(217, 119, 6, 0.14);
  --danger: #b42318;
  --danger-soft: rgba(180, 35, 24, 0.12);
  --positive: #166534;
  --shadow: 0 12px 30px rgba(30, 42, 62, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --panel: #161b22;
    --panel-2: #1f2630;
    --text: #e6edf3;
    --muted: #8b949e;
    --line: #30363d;
    --accent: #2ea043;
    --accent-soft: rgba(46, 160, 67, 0.18);
    --warn: #d29922;
    --warn-soft: rgba(210, 153, 34, 0.18);
    --danger: #f85149;
    --danger-soft: rgba(248, 81, 73, 0.16);
    --positive: #3fb950;
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-feature-settings: "ss01", "cv11";
}

.num,
.metrics strong,
.row strong,
.chart text,
.metrics.small strong,
.equity-svg text {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 16px 0 28px;
}

/* ============ Topbar ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin: 0 -8px 18px;
  padding: 14px 8px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

h1, h2, p { margin: 0; }
h1 { font-size: 22px; line-height: 1.2; letter-spacing: -0.01em; }
h2 { font-size: 15px; margin-bottom: 14px; }

.brand { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.brand-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: nowrap;     /* Heartbeat bleibt neben h1, springt nie um */
}
.brand-head h1 { white-space: nowrap; }

/* ============ Status pills + heartbeat ============ */
.status-pills { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 999px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--muted);
}
.pill.ok { color: var(--positive); border-color: color-mix(in srgb, var(--positive) 35%, var(--line)); }
.pill.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 35%, var(--line)); }
.pill.bad { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 35%, var(--line)); }

.heartbeat {
  /* Stabiles Layout: Pill-Breite aendert sich nicht beim Text-Wechsel */
  min-width: 8.5ch;
  justify-content: flex-start;
}
.heartbeat #heartbeat-text {
  font-variant-numeric: tabular-nums;
  display: inline-block;
  min-width: 5.5ch;
}
.heartbeat .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  display: inline-block;
  flex-shrink: 0;
}
.heartbeat.ok .dot { background: var(--positive); animation: pulse 1.6s ease-in-out infinite; }
.heartbeat.warn .dot { background: var(--warn); }
.heartbeat.bad .dot { background: var(--danger); }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--positive) 60%, transparent); }
  50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--positive) 0%, transparent); }
}

/* ============ Action groups ============ */
.actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; justify-content: flex-end; }
.action-group { display: flex; gap: 6px; align-items: center; padding-right: 10px; border-right: 1px solid var(--line); }
.action-group:last-child { border-right: 0; padding-right: 0; }
.action-group-end { gap: 8px; }

button {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  min-height: 40px;
  min-width: 44px;
  padding: 0 14px;
  border-radius: 8px;
  font-weight: 650;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 120ms, background 120ms, transform 60ms;
}
button:hover { border-color: var(--accent); }
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-secondary { background: var(--panel-2); }
.btn-primary { background: var(--accent); color: white; border-color: var(--accent); }
.btn-primary:hover { filter: brightness(1.05); }
.btn-warn { background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 50%, var(--line)); color: var(--warn); }
.btn-icon {
  background: transparent;
  border: none;
  font-size: 22px;
  line-height: 1;
  width: 36px;
  height: 36px;
  min-height: 36px;
  min-width: 36px;
  padding: 0;
  color: var(--muted);
}
.btn-icon:hover { color: var(--text); background: var(--panel-2); }

button.danger {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
  box-shadow: 0 4px 14px var(--danger-soft);
}
button.danger:hover { filter: brightness(1.08); }

.logout-form { display: inline; margin: 0; }
.logout-link {
  background: transparent;
  border: 1px dashed var(--line);
  color: var(--muted);
  font-weight: 500;
  font-size: 13px;
  padding: 0 12px;
}

/* ============ Trades table ============ */
#closed-trades-panel { margin-top: 12px; padding: 18px; }
.trades-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.trades-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.trades-table thead {
  background: var(--panel-2);
  position: sticky;
  top: 0;
  z-index: 1;
}
.trades-table th,
.trades-table td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.trades-table th {
  font-weight: 600;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.trades-table th:hover { color: var(--text); }
.trades-table th.sorted-asc::after { content: " ↑"; }
.trades-table th.sorted-desc::after { content: " ↓"; }
.trades-table th.num-cell,
.trades-table td.num-cell { text-align: right; white-space: nowrap; }
.trades-table tbody tr:hover { background: var(--panel-2); }
.trades-table .pnl-pos { color: var(--positive); font-weight: 600; }
.trades-table .pnl-neg { color: var(--danger); font-weight: 600; }
.trades-table .reason-take { color: var(--positive); }
.trades-table .reason-trail { color: var(--warn); }
.trades-table .reason-stop { color: var(--danger); }

@media (max-width: 760px) {
  .trades-table { font-size: 12px; }
  .trades-table th,
  .trades-table td { padding: 6px 8px; }
}

/* ============ Optimize form ============ */
#optimize-panel { margin-top: 12px; padding: 18px; }
.opt-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)) auto;
  gap: 12px;
  align-items: end;
  margin-bottom: 14px;
}
.opt-form label {
  display: grid;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
}
.opt-form input {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
  background: var(--panel);
  color: var(--text);
  font-family: inherit;
  font-variant-numeric: tabular-nums;
}
.opt-form button { white-space: nowrap; }

#optimize-results .opt-trial {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
#optimize-results .opt-trial.best {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-left: 3px solid var(--accent);
}
#optimize-results .opt-trial small {
  display: block;
  color: var(--muted);
  margin-top: 2px;
}
.logout-link:hover { color: var(--text); border-color: var(--accent); border-style: solid; }

/* ============ Connection banner ============ */
.connection-banner {
  background: var(--danger-soft);
  border: 1px solid color-mix(in srgb, var(--danger) 40%, var(--line));
  color: var(--danger);
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 14px;
  font-weight: 500;
}

/* ============ Metric cards ============ */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}
.metrics article,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.metrics article { padding: 18px; }
.metrics span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.metrics strong { font-size: 24px; }

.metrics article.positive strong { color: var(--positive); }
.metrics article.negative strong { color: var(--danger); }

.meter {
  margin-top: 10px;
  height: 6px;
  background: var(--panel-2);
  border-radius: 999px;
  position: relative;
  overflow: hidden;
}
.meter-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  border-radius: inherit;
  transition: width 240ms ease, background 240ms ease;
}
.meter small {
  position: absolute;
  top: -18px;
  right: 0;
  font-size: 11px;
  color: var(--muted);
}
.meter.warn .meter-fill { background: var(--warn); }
.meter.bad .meter-fill { background: var(--danger); }

/* ============ Panels / grid ============ */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.panel { padding: 18px; min-height: 230px; }
.wide { grid-column: 1 / -1; }

.rows { display: grid; gap: 8px; }
.row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
.row:first-child { border-top: 0; }
.row small { display: block; color: var(--muted); margin-top: 4px; }

.row.positive strong { color: var(--positive); }
.row.negative strong { color: var(--danger); }
.row.exit-take strong::before { content: "✓ "; }
.row.exit-trail strong::before { content: "↘ "; }
.row.exit-stop strong::before  { content: "✗ "; }

.empty { color: var(--muted); font-size: 14px; }

/* ============ Backtest & IBKR panel heads ============ */
.muted { color: var(--muted); font-size: 13px; }

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.panel-head h2 { margin: 0; }

.panel-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.metrics.small {
  grid-template-columns: repeat(8, minmax(0, 1fr));
  margin-bottom: 16px;
  gap: 8px;
}
.metrics.small article {
  padding: 12px;
  box-shadow: none;
}
.metrics.small span { font-size: 11px; margin-bottom: 4px; }
.metrics.small strong { font-size: 16px; }

.chart {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px;
}
.equity-svg { width: 100%; height: auto; display: block; }
.equity-svg text { fill: var(--muted); }

#ibkr-panel { margin: 12px 0; padding: 18px; }
#backtest-panel { margin: 12px 0; padding: 18px; }
#ibkr-positions { margin-top: 16px; }

.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
  margin-left: 8px;
  vertical-align: middle;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge.ok { background: color-mix(in srgb, var(--positive) 18%, transparent); color: var(--positive); }
.badge.bad { background: var(--danger-soft); color: var(--danger); }

.btn-secondary.pulsing { animation: btn-pulse 2s ease-in-out infinite; }
@keyframes btn-pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-soft); }
  50% { box-shadow: 0 0 0 8px transparent; }
}

/* ============ Login ============ */
.login-body { background: var(--bg); }
.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 28px 32px;
  width: 100%;
  max-width: 360px;
  display: grid;
  gap: 14px;
}
.login-card h1 { font-size: 22px; margin: 0; }
.login-card label { display: grid; gap: 6px; font-size: 13px; }
.login-card input {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  font-size: 16px;
  background: var(--panel);
  color: var(--text);
  font-family: inherit;
}
.login-card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.login-card button {
  margin-top: 6px;
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.login-card .error,
.login-card .hint { display: none; font-size: 13px; margin: 0; }
.login-card .error { color: var(--danger); }
.login-card .hint { color: var(--warn); }
.login-card .error.invalid[data-error="invalid"] { display: block; }
.login-card .error.rate[data-error="rate_limited"] { display: block; }

/* ============ Mobile ============ */
@media (max-width: 1000px) {
  .metrics.small { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }
  .actions { justify-content: stretch; }
  .action-group { flex: 1; border-right: 0; padding-right: 0; }
  .action-group button { flex: 1; }
  .action-group-end { flex-wrap: wrap; }
  button { min-height: 44px; }
  .metrics, .grid { grid-template-columns: 1fr; }
  .wide { grid-column: auto; }
  h1 { font-size: 19px; }
}