/**
 * Base Styles
 * 
 * CSS reset, typography, and base element styles.
 */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-light);
  color: var(--text-primary);
  line-height: 1.6;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-hover);
}

h2 {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

h3 {
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-primary);
}

summary {
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 0.875rem;
  padding: 8px 0;
  transition: var(--transition);
}

summary:hover {
  color: var(--primary-color);
}

/* Focus styles for accessibility */
a:focus,
button:focus,
input:focus,
summary:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Utility classes */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.tdcent {
  text-align: center;
}