:root {
  --primary: #6D4226;
  --primary-light: #8a5a3a;
  --secondary: #E7DDC9;
  --accent: #B85042;
  --text-dark: #1a1a1a;
  --text-muted: #595959;
  --bg: #FAF7F2;
  --bg-dark: #2B1A0E;
  --maple: #F4E4B7;
  --rule: #cdb89c;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Charter, "Iowan Old Style", "Source Serif Pro", Georgia, serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg);
}

.hero {
  background: linear-gradient(180deg, var(--bg-dark), var(--primary));
  color: var(--bg);
  padding: 4rem 1rem 5rem;
  text-align: center;
}
.hero .accent { color: var(--maple); font-style: italic; }
.hero h1 {
  font-family: Georgia, "Iowan Old Style", serif;
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin: 0.5rem 0;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.hero .lead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  max-width: 38rem;
  margin: 1rem auto;
  color: var(--maple);
}
.hero .keys {
  font-family: "Source Code Pro", Consolas, monospace;
  font-size: 1.1rem;
  letter-spacing: 0.2em;
  color: var(--maple);
  margin-top: 2rem;
}
.hero .meta {
  margin-top: 2.5rem;
  color: var(--secondary);
  font-size: 0.9rem;
  font-style: italic;
}

main {
  max-width: 56rem;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

section { margin: 3rem 0; }
section h2 {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 2rem;
  color: var(--primary);
  border-bottom: 3px solid var(--accent);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}
section h3 {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1.3rem;
  color: var(--primary);
  margin-top: 2rem;
}

.lead-text {
  font-size: 1.1rem;
  color: var(--text-dark);
  line-height: 1.7;
}

.callout {
  background: var(--secondary);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 4px 4px 0;
}
.callout .label {
  font-family: "Inter", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.family-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.family-card {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1.25rem;
  text-align: center;
}
.family-card .key {
  font-family: Georgia, serif;
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--accent);
  margin: 0;
}
.family-card .freq {
  font-family: "Source Code Pro", monospace;
  color: var(--text-muted);
  font-size: 0.95rem;
}
.family-card .dim {
  font-family: "Inter", sans-serif;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}
.family-card a {
  display: inline-block;
  margin-top: 0.75rem;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}
.family-card a:hover { color: var(--accent); }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-family: "Inter", sans-serif;
  font-size: 0.92rem;
}
thead {
  background: var(--primary);
  color: var(--bg);
}
th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--rule);
}
tbody tr:nth-child(even) { background: rgba(231, 221, 201, 0.4); }
.num { text-align: right; font-variant-numeric: tabular-nums; }

.drawing-frame {
  background: white;
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1rem;
  margin: 1.5rem 0;
}
.drawing-frame img,
.drawing-frame svg,
.drawing-frame object {
  width: 100%;
  height: auto;
  display: block;
}

.build-steps { counter-reset: step; }
.build-steps .step {
  counter-increment: step;
  position: relative;
  padding-left: 4rem;
  margin-bottom: 1.5rem;
}
.build-steps .step::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg);
  font-family: Georgia, serif;
  font-size: 1.2rem;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
}
.build-steps .step h4 {
  font-family: "Inter", sans-serif;
  margin: 0 0 0.4rem;
  color: var(--primary);
  font-size: 1.05rem;
}
.build-steps .step p {
  margin: 0;
  color: var(--text-dark);
}

.risk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.85rem;
}
.risk-card {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--accent);
  padding: 0.85rem 1rem;
  border-radius: 0 4px 4px 0;
}
.risk-card.high { border-left-color: #c0392b; }
.risk-card.med  { border-left-color: var(--accent); }
.risk-card.low  { border-left-color: #5a8d4a; }
.risk-card .id {
  font-family: "Source Code Pro", monospace;
  background: var(--primary);
  color: var(--bg);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  font-size: 0.75rem;
  margin-right: 0.5rem;
}
.risk-card .title {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  color: var(--text-dark);
}
.risk-card .test {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

.resources {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.resource {
  background: var(--bg-dark);
  color: var(--bg);
  padding: 1rem 1.25rem;
  border-radius: 4px;
  text-decoration: none;
  transition: background 0.15s;
}
.resource:hover { background: var(--primary); }
.resource .label {
  display: block;
  font-family: "Inter", sans-serif;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--maple);
  margin-bottom: 0.3rem;
}
.resource .value {
  font-family: "Source Code Pro", monospace;
  font-size: 0.95rem;
}

footer {
  background: var(--bg-dark);
  color: var(--secondary);
  padding: 2rem 1rem;
  text-align: center;
  margin-top: 4rem;
  font-size: 0.85rem;
}
footer a { color: var(--maple); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* responsive tweaks */
@media (max-width: 600px) {
  .hero { padding: 3rem 1rem 4rem; }
  body { font-size: 15px; }
  table { font-size: 0.85rem; }
  th, td { padding: 0.4rem 0.5rem; }
}