:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1f2630;
  --border: #2a313c;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --green: #3fb950;
  --red: #f85149;
  --amber: #d29922;
  --action: #58a6ff;
  --safety: #f85149;
  --target: #3fb950;
  --trend: #d29922;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

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

code {
  background: var(--panel-2);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 12px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topnav .brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  margin-right: 8px;
}
.topnav a {
  color: var(--muted);
  font-size: 0.95rem;
}
.topnav a.active, .topnav a:hover { color: var(--text); text-decoration: none; }
.topnav .version-badge {
  margin-left: auto;
  padding: 3px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #58a6ff;
  background: rgba(88, 166, 255, 0.12);
  border: 1px solid rgba(88, 166, 255, 0.4);
  border-radius: 999px;
  letter-spacing: 0.02em;
}
.topnav .version-badge:hover { color: #79b8ff; background: rgba(88, 166, 255, 0.2); text-decoration: none; }

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}
.container.wide { max-width: 1280px; }

.hero h1 {
  font-size: 2.2rem;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.hero .lede {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0 0 24px;
  max-width: 640px;
}
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  background: var(--panel-2);
  color: var(--text);
}
.btn.primary { background: var(--accent); color: #0e1116; }
.btn.primary:hover { filter: brightness(1.1); text-decoration: none; }
.btn.ghost { background: transparent; border-color: var(--border); }
.btn.ghost:hover { background: var(--panel); text-decoration: none; }
.btn.danger { background: transparent; border-color: var(--red); color: var(--red); }
.btn.small { padding: 6px 12px; font-size: 0.85rem; }

section { margin-top: 48px; }
section h2 { margin: 0 0 8px; font-size: 1.5rem; }
.section-lede { color: var(--muted); margin: 0 0 24px; }

.concept {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 22px;
  margin: 16px 0;
}
.concept h3 { margin: 0 0 8px; font-size: 1.1rem; }
.concept p { margin: 6px 0; }
.concept .example {
  background: var(--panel-2);
  border-left: 3px solid var(--accent);
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 0.92rem;
  color: var(--muted);
  margin-top: 10px;
}
.concept .example strong { color: var(--text); }

.steps { padding-left: 22px; }
.steps li { margin: 8px 0; }

.foot {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

/* Chart page */
.chart-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 16px;
  margin-top: 16px;
}
@media (max-width: 900px) {
  .chart-layout { grid-template-columns: 1fr; }
}

.chart-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}
#chart { width: 100%; height: 560px; cursor: crosshair; }

.sidebar {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  font-size: 0.9rem;
}
.sidebar h3 {
  margin: 0 0 8px;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.sidebar .field {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
}
.sidebar .field:last-child { border-bottom: none; }
.sidebar .field label { color: var(--muted); }
.sidebar .field input {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 4px 8px;
  width: 100px;
  text-align: right;
  font-family: inherit;
  font-size: 0.9rem;
}
.sidebar .actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}
.sidebar .help {
  color: var(--muted);
  font-size: 0.82rem;
  margin: 8px 0 0;
  line-height: 1.45;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 8px;
}
.legend .dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 4px;
  vertical-align: middle;
}
.legend .action { background: var(--action); }
.legend .safety { background: var(--safety); }
.legend .target { background: var(--target); }
.legend .trend { background: var(--trend); }

.toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
  align-items: center;
}
.toolbar .status {
  color: var(--muted);
  font-size: 0.85rem;
  margin-left: auto;
}

.rr-display {
  background: var(--panel-2);
  border-radius: 6px;
  padding: 10px;
  margin-top: 12px;
  text-align: center;
}
.rr-display .ratio {
  font-size: 1.4rem;
  font-weight: 700;
}
.rr-display .ratio.good { color: var(--green); }
.rr-display .ratio.bad { color: var(--red); }
.rr-display .ratio.neutral { color: var(--amber); }
.rr-display .label { color: var(--muted); font-size: 0.8rem; }

/* Watchlist */
.setup-list { display: flex; flex-direction: column; gap: 12px; margin-top: 16px; }
.setup-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
.setup-card .head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.setup-card .head h3 { margin: 0; font-size: 1.05rem; }
.setup-card .levels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 8px;
  font-size: 0.88rem;
}
.setup-card .lvl { background: var(--panel-2); padding: 8px; border-radius: 4px; }
.setup-card .lvl .k { color: var(--muted); display: block; font-size: 0.75rem; }
.setup-card .lvl .v { font-weight: 600; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge.armed { background: rgba(88,166,255,0.15); color: var(--accent); }
.badge.triggered { background: rgba(63,185,80,0.15); color: var(--green); }
.badge.stopped { background: rgba(248,81,73,0.15); color: var(--red); }

.empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
  background: var(--panel);
  border: 1px dashed var(--border);
  border-radius: 8px;
}

.version-footer {
  position: fixed;
  bottom: 8px;
  right: 12px;
  font-size: 0.72rem;
  color: var(--muted);
  background: rgba(22, 27, 34, 0.85);
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  backdrop-filter: blur(4px);
  z-index: 5;
}
.version-footer a { color: var(--muted); }
.version-footer a:hover { color: var(--text); text-decoration: none; }

.callout {
  background: rgba(88,166,255,0.08);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 4px;
  margin: 16px 0;
  font-size: 0.9rem;
}
.callout strong { color: var(--text); }