:root {
  --bg-color: #fafafa;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a68;
  --accent: #4361ee;
  --accent-hover: #3a0ca3;
  --border-color: #e2e8f0;
  --card-bg: #ffffff;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: Georgia, 'Times New Roman', Times, serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 90%;
  max-width: 1000px;
  margin: 0 auto;
}

.site-header {
  background-color: var(--text-primary);
  color: white;
  padding: 2rem 0;
  margin-bottom: 2rem;
}

.site-header h1 {
  margin-bottom: 0.5rem;
  font-size: 2rem;
}

.site-header p {
  color: #a0aec0;
  margin-bottom: 1rem;
}

.site-header nav a, .site-footer nav a {
  color: white;
  text-decoration: none;
  margin-right: 1.5rem;
  font-weight: 500;
  transition: color 0.2s;
}

.site-header nav a:hover, .site-footer nav a:hover {
  color: var(--accent);
}

section {
  margin-bottom: 3rem;
}

h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  padding-bottom: 0.25rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 500px;
}

select, button {
  padding: 0.75rem;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: inherit;
}

button {
  background-color: var(--accent);
  color: white;
  font-weight: bold;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s;
}

button:hover {
  background-color: var(--accent-hover);
}

.results {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px dashed var(--border-color);
}

.results.hidden {
  display: none;
}

.match-box {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent);
  padding: 1.5rem;
  margin-top: 1rem;
  border-radius: 4px;
}

.code-block {
  background: #2d3748;
  color: #e2e8f0;
  padding: 1rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  overflow-x: auto;
  margin: 1rem 0;
}

.theory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.theory-card {
  background: var(--card-bg);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.theory-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.site-footer {
  margin-top: auto;
  background: var(--text-primary);
  color: white;
  padding: 2rem 0;
  text-align: center;
}

.site-footer p {
  color: #a0aec0;
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .control-group {
    flex-direction: row;
    align-items: flex-end;
  }
  label {
    width: 100%;
  }
}


/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}