:root {
  --bg: #f9fafb;
  --surface: #ffffff;
  --border: #e5e7eb;
  --text: #374151;
  --text-muted: #6b7280;
  --nav-bg: #2C5470;
  --accent: #3B6E8C;
  --accent-dark: #2C5470;
  --warning-bg: #faeeda;
  --warning-text: #854f0b;
  --success-bg: #e1f5ee;
  --success-text: #085041;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent-dark); }
a:hover { color: var(--accent); }
a:visited { color: var(--accent-dark); }
#header {
  background: var(--surface);
  height: 96px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding-left: 20px;
}
.logo-img {
  height: 80px;
  width: auto;
  display: block;
}
#nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0;
  padding: 8px 16px;
  list-style: none;
  background: var(--nav-bg);
}
#nav a {
  display: block;
  padding: 8px 14px;
  border-radius: 6px;
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
}
#nav a:hover, #nav a.active { background: rgba(255,255,255,0.15); }
main.page { max-width: 720px; margin: 0 auto; padding: 32px 20px 60px; }
.page h2 { font-size: 1.4rem; font-weight: 600; margin-top: 0; }
.page h3 { font-size: 1.1rem; font-weight: 600; }
.page p, .page ul, .page ol { max-width: 640px; }
.page table { border-collapse: collapse; margin-top: 12px; }
.page table th, .page table td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; font-size: 0.9rem; }
.hero { display: block; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin-top: 24px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.card h3 { margin-top: 0; }
.card p { font-size: 0.85rem; margin: 0; }
.form-panel {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-top: 16px;
}
.form-panel label { display: block; margin-bottom: 8px; font-size: 0.95rem; }
.form-panel textarea, .form-panel select {
  width: 100%;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.95rem;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  resize: vertical;
  margin-bottom: 8px;
}
.field-row { display: flex; gap: 16px; }
.field-row > div { flex: 1; }
@media (max-width: 480px) {
  .field-row { flex-direction: column; gap: 0; }
}
.checkbox-row { display: flex; flex-wrap: wrap; gap: 16px; margin: 16px 0; font-size: 0.9rem; }
.checkbox-row label { display: flex; align-items: center; gap: 6px; margin: 0; }
.form-actions { display: flex; gap: 10px; }
button {
  font: inherit;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
}
button[type="submit"] { background: var(--accent); color: #fff; border-color: var(--accent-dark); }
button[type="submit"]:hover { background: var(--accent-dark); }
#result:empty { display: none; }
.result-panel { margin-top: 20px; padding: 20px; border-radius: 12px; border: 1px solid var(--border); }
.result-panel.success { background: var(--success-bg); color: var(--success-text); }
.result-panel.warning { background: var(--warning-bg); color: var(--warning-text); }
.result-panel .triplets { font-family: "SFMono-Regular", Consolas, monospace; word-break: break-all; }
.result-panel .tm-value { font-size: 1.6rem; font-weight: 600; margin: 8px 0; }
.triplets-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
.term-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  min-width: 20px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.6rem;
  font-weight: 600;
}
.chart-section {
  display: none;
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-top: 20px;
}
.chart-section canvas { max-width: 100%; }
.export-row { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.section-info {
  position: absolute;
  top: 12px;
  right: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.7rem;
  font-style: italic;
  font-weight: 600;
  cursor: help;
}
input[type="checkbox"] {
  accent-color: var(--accent-dark);
}
#footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}
#footer p { margin: 0; }
.visitor-count { text-align: center; color: var(--text-muted); font-size: 0.85rem; margin-top: 32px; }