* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  padding: 0;
  background: #fafafa;
  color: #222;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

h1 { font-weight: 600; margin-bottom: 1rem; }
h2 { font-weight: 600; margin-top: 2rem; margin-bottom: 0.5rem; }

label { display: block; font-weight: 600; margin-top: 0.75rem; }
small { display: block; color: #555; margin-top: 0.25rem; }

input[type="file"],
input[type="number"] {
  display: block;
  margin-top: 0.25rem;
  padding: 0.4rem;
  font-size: 1rem;
}

button {
  margin-top: 1rem;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  cursor: pointer;
  border: 1px solid #333;
  background: #fff;
}

fieldset { border: 1px solid #ccc; padding: 1rem 1.5rem 1.5rem; }
legend { font-weight: 600; padding: 0 0.5rem; }

.error-banner {
  background: #fff4f0;
  border: 1px solid #cc4422;
  color: #882200;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
}

.stats { color: #555; font-size: 0.95rem; margin-bottom: 0.25rem; }
.fabric-tip { color: #555; font-size: 0.9rem; margin-top: 0; margin-bottom: 1.5rem; }

.chart {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid #ddd;
  background: #fff;
  margin-bottom: 1.5rem;
}

table.legend {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
table.legend th,
table.legend td {
  border: 1px solid #ddd;
  padding: 0.4rem 0.6rem;
  text-align: left;
}
table.legend th { background: #f3f3f3; }
table.legend td.symbol { font-size: 1.4rem; text-align: center; width: 3rem; }

.swatch {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  vertical-align: middle;
  border: 1px solid #888;
  margin-right: 0.4rem;
}

details { margin-top: 1.5rem; }
details summary { cursor: pointer; font-weight: 600; }

pre.written {
  background: #f7f7f7;
  border: 1px solid #ddd;
  padding: 0.75rem;
  margin-top: 0.5rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.85rem;
  overflow-x: auto;
}

.lede { color: #555; margin-bottom: 1.5rem; }

.variant-nav {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.variant-nav a {
  flex: 1 1 0;
  min-width: 12rem;
  border: 1px solid #ccc;
  background: #fff;
  padding: 0.6rem 0.9rem;
  text-decoration: none;
  color: #222;
}
.variant-nav a:hover { background: #f3f3f3; }
.variant-nav a strong { display: block; font-size: 1rem; }
.variant-nav a small { color: #555; margin-top: 0.15rem; }

section.variant {
  border-top: 2px solid #ddd;
  padding-top: 1rem;
  margin-top: 2.5rem;
}
section.variant:first-of-type { border-top: none; padding-top: 0; }