:root {
  --bg: #f3efe6;
  --bg2: #e7e0d2;
  --ink: #1a1f1c;
  --muted: #5c6660;
  --line: #cfc6b6;
  --accent: #1f6f5b;
  --accent2: #c45c26;
  --up: #1f6f5b;
  --down: #a33b2b;
  --panel: rgba(255, 252, 245, 0.92);
  --shadow: 0 18px 50px rgba(26, 31, 28, 0.08);
  --font: "Source Sans 3", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #dfece6 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #f0dcc8 0%, transparent 50%),
    linear-gradient(180deg, var(--bg), var(--bg2));
  min-height: 100vh;
}

.shell { max-width: 1100px; margin: 0 auto; padding: 24px 20px 48px; }
.top {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; margin-bottom: 28px; flex-wrap: wrap;
}
.logo {
  font-family: var(--display);
  font-size: 1.6rem; font-weight: 700; color: var(--ink);
  text-decoration: none; letter-spacing: -0.02em;
}
.nav { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 600; }
.nav a:hover { color: var(--ink); }
.btn {
  display: inline-block; padding: 0.45rem 0.9rem; border-radius: 999px;
  background: var(--ink); color: #fff !important; text-decoration: none; border: 0;
  font-weight: 600; cursor: pointer;
}
.btn.primary { background: var(--accent); }
.linkish {
  background: none; border: 0; color: var(--accent2); font: inherit; font-weight: 600;
  cursor: pointer; padding: 0;
}
.inline { display: inline; margin: 0; }

.hero { margin-bottom: 28px; }
.hero.compact { margin-bottom: 18px; }
.eyebrow {
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.75rem;
  color: var(--accent); font-weight: 700; margin: 0 0 8px;
}
.hero h1 {
  font-family: var(--display); font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 10px; letter-spacing: -0.03em;
}
.lede { margin: 0; color: var(--muted); max-width: 40rem; line-height: 1.5; }

.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px; margin-bottom: 22px;
}
.stat {
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 16px; text-decoration: none; color: inherit; box-shadow: var(--shadow);
}
.stat-label { display: block; color: var(--muted); font-size: 0.85rem; font-weight: 600; }
.stat-value { display: block; font-family: var(--display); font-size: 1.8rem; margin: 4px 0; }
.stat-value.up { color: var(--up); }
.stat-value.down { color: var(--down); }
.stat-meta { display: block; color: var(--muted); font-size: 0.85rem; }

.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: 18px;
  padding: 18px 18px 22px; margin-bottom: 18px; box-shadow: var(--shadow);
}
.panel.narrow { max-width: 480px; }
.panel h2 { font-family: var(--display); margin: 0 0 12px; font-size: 1.25rem; }
.hint { color: var(--muted); }
.term {
  border-bottom: 1px dotted color-mix(in srgb, var(--muted) 70%, transparent);
  cursor: help;
}
.term:hover, .term:focus {
  color: var(--ink, #1a1a1a);
}
.kv-wide { grid-template-columns: minmax(160px, 200px) 1fr; }
.error { color: var(--down); font-weight: 600; }

.table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.table th, .table td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); }
.table th { color: var(--muted); font-weight: 600; }

.form { display: grid; gap: 12px; }
.form.grid2 { grid-template-columns: 1fr 1fr; }
.form label { display: grid; gap: 4px; font-weight: 600; font-size: 0.9rem; }
.form label.full { grid-column: 1 / -1; }
.form input, .form select {
  padding: 0.55rem 0.7rem; border-radius: 10px; border: 1px solid var(--line);
  font: inherit; background: #fff;
}
.btn.full { grid-column: 1 / -1; }

.kv { display: grid; grid-template-columns: 140px 1fr; gap: 8px 12px; margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-weight: 600; }

.foot {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-top: 28px; color: var(--muted); font-size: 0.85rem;
}

@media (max-width: 640px) {
  .form.grid2 { grid-template-columns: 1fr; }
}

.strat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.strat-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 16px; box-shadow: var(--shadow);
}
.strat-card:hover { border-color: var(--accent); }
.strat-card-top { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.strat-name { font-family: var(--display); font-size: 1.15rem; font-weight: 700; }
.strat-short { color: var(--muted); font-size: 0.92rem; line-height: 1.4; margin: 8px 0 12px; }
.strat-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 10px; margin: 0; }
.strat-meta dt { color: var(--muted); font-size: 0.75rem; font-weight: 600; }
.strat-meta dd { margin: 0; font-weight: 600; font-size: 0.9rem; }
.pill {
  font-size: 0.75rem; font-weight: 700; padding: 0.2rem 0.55rem; border-radius: 999px;
}
.pill.on { background: #dfece6; color: var(--up); }
.pill.off { background: #efe6e2; color: var(--down); }

.rules { margin: 12px 0 0; padding-left: 1.2rem; color: var(--ink); }
.rule-diagram { width: 100%; max-width: 640px; height: auto; border-radius: 12px; border: 1px solid var(--line); }
.example-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.example h3 { font-family: var(--display); font-size: 1.05rem; margin: 0 0 6px; }
.perf-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.perf-grid .panel { margin-bottom: 0; }
.real-part + .real-part { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); }
.toggle-row { display: flex !important; align-items: center; gap: 10px; font-weight: 600; }
.toggle-row input { width: auto; }
.up { color: var(--up); }
.down { color: var(--down); }

.resource-list { list-style: none; margin: 0; padding: 0; }
.resource-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.resource-list li:last-child { border-bottom: 0; }
.resource-title {
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}
a.resource-title:hover { color: var(--accent); }
.resource-meta {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  margin-top: 2px;
}