/**
 * MODERN UI/UX DESIGN SYSTEM
 * Main stylesheet - imports all modules
 *
 * Architecture:
 * 1. Design Tokens (variables)
 * 2. Reset & Base
 * 3. Utilities
 * 4. Components
 * 5. Pages
 */

/* ============================================
   1. FOUNDATION
   ============================================ */
@import url('tokens.css');
@import url('reset.css');
@import url('base.css');
@import url('utilities.css');

/* ============================================
   2. COMPONENTS
   ============================================ */
@import url('components/navigation.css');
@import url('components/sidebar-nav.css');
@import url('components/button.css');
@import url('components/card.css');
@import url('components/hero.css');
@import url('components/callout.css');
@import url('components/step-progress.css');
@import url('components/footer.css');

/* ============================================
   3. PAGES (Optional page-specific styles)
   ============================================ */
/* @import url('pages/home.css'); */
/* @import url('pages/hub.css'); */
/* @import url('pages/article.css'); */

/* ============================================
   4. ADDITIONAL STYLES
   ============================================ */

/* Article/Content Wrapper */
.article {
  max-width: var(--width-content-md);
  margin: 0 auto;
  padding: var(--space-8) var(--space-4);
}

@media (min-width: 768px) {
  .article {
    padding: var(--space-12) var(--space-4);
  }
}

.article__header {
  margin-bottom: var(--space-12);
  text-align: center;
}

.article__title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-4);
}

.article__subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.article__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* Content Typography */
.article__content h2 {
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
  font-family: var(--font-display);
}

.article__content h3 {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  line-height: var(--leading-snug);
}

.article__content p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.article__content strong {
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

/* Enhanced Lists */
.article__content ul,
.article__content ol {
  list-style: none;
  padding-left: 0;
  margin-bottom: var(--space-6);
}

.article__content li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.article__content ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent-primary);
  font-weight: var(--weight-bold);
}

.article__content ol {
  counter-reset: list-counter;
}

.article__content ol li::before {
  counter-increment: list-counter;
  content: counter(list-counter) ".";
  position: absolute;
  left: 0;
  color: var(--color-accent-primary);
  font-weight: var(--weight-semibold);
}

/* Nested lists */
.article__content li ul,
.article__content li ol {
  margin-top: var(--space-3);
  margin-bottom: var(--space-3);
}

/* Links in content */
.article__content a {
  color: var(--color-accent-primary);
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color var(--transition-base);
}

.article__content a:hover {
  text-decoration-color: var(--color-accent-primary);
}

/* About Section (for home page) */
.about-section {
  padding: var(--space-16) 0;
  background: var(--color-bg-secondary);
}

.about-section__content {
  max-width: var(--width-content-lg);
  margin: 0 auto;
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 768px) {
  .about-section__content {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.about-section__text h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.about-section__text p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.about-section__image img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* Utility Classes for Legacy Support */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}