/* ==========================================================================
   VisaSlip Blog Styles - A reading experience designed for clarity
   Built with typography-first principles for optimal readability
   ========================================================================== */

/* Reading-optimized base typography */
:root {
  --blog-text: #374151;
  --blog-heading: #111827;
  --blog-muted: #6b7280;
  --blog-subtle: #9ca3af;
  --blog-accent: #4facdb;
  --blog-accent-hover: #3a95c7;
  --blog-warm: #ff8a65;
  --blog-surface: #ffffff;
  --blog-bg: #f9fafb;
  --blog-border: #e5e7eb;
  --blog-border-light: #f3f4f6;

  /* Typography scale */
  --font-xs: 0.8125rem;
  --font-sm: 0.875rem;
  --font-base: 1.0625rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  --font-3xl: 1.875rem;
  --font-4xl: 2.25rem;

  /* Spacing rhythm */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Reading line length */
  --reading-width: 680px;
  --content-width: 760px;
}

/* Smooth font rendering */
.blog-main,
.blog-article {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ==========================================================================
   Breadcrumbs - Subtle navigation
   ========================================================================== */

.breadcrumbs {
  background: transparent;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--blog-border-light);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--font-sm);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--blog-subtle);
}

.breadcrumbs li:not(:last-child)::after {
  content: '\203A';
  color: var(--blog-border);
  font-size: 1.1em;
}

.breadcrumbs a {
  color: var(--blog-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumbs a:hover {
  color: var(--blog-accent);
}

.breadcrumbs li:last-child {
  color: var(--blog-text);
  font-weight: 500;
}

/* ==========================================================================
   Blog Main Container
   ========================================================================== */

.blog-main {
  padding: 0;
  min-height: 60vh;
  background: var(--blog-surface);
}

/* ==========================================================================
   Blog Hub / Index Page - Category landing
   ========================================================================== */

.blog-hub {
  padding: 0;
}

.blog-hub-header {
  background: linear-gradient(180deg,
    rgba(79, 172, 219, 0.08) 0%,
    rgba(249, 250, 251, 0) 100%
  );
  padding: var(--space-16) var(--space-4);
  text-align: center;
  margin-bottom: var(--space-12);
}

.blog-hub-header h1 {
  font-size: clamp(var(--font-3xl), 5vw, var(--font-4xl));
  font-weight: 700;
  margin: 0 0 var(--space-3);
  color: var(--blog-heading);
  letter-spacing: -0.02em;
}

.blog-hub-header p {
  color: var(--blog-muted);
  font-size: var(--font-lg);
  margin: 0 auto;
  max-width: 540px;
  line-height: 1.7;
}

/* Hub Categories - Filter pills */
.hub-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-12);
  justify-content: center;
}

.hub-category {
  background: var(--blog-surface);
  color: var(--blog-text);
  padding: var(--space-3) var(--space-6);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-sm);
  border: 1.5px solid var(--blog-border);
  transition: all 0.2s ease;
}

.hub-category:hover {
  border-color: var(--blog-accent);
  color: var(--blog-accent);
  background: rgba(79, 172, 219, 0.04);
}

.hub-category.active {
  background: var(--blog-accent);
  border-color: var(--blog-accent);
  color: #fff;
}

/* ==========================================================================
   Blog Post Cards - Clean, scannable
   ========================================================================== */

.blog-post-list {
  display: grid;
  gap: var(--space-6);
  max-width: 840px;
  margin: 0 auto;
}

.blog-post-card {
  background: var(--blog-surface);
  border: 1.5px solid var(--blog-border-light);
  border-radius: 16px;
  padding: var(--space-8);
  text-decoration: none;
  display: block;
  transition: all 0.25s ease;
  position: relative;
}

.blog-post-card::after {
  content: '\2192';
  position: absolute;
  right: var(--space-8);
  top: 50%;
  transform: translateY(-50%) translateX(-8px);
  font-size: var(--font-xl);
  color: var(--blog-accent);
  opacity: 0;
  transition: all 0.25s ease;
}

.blog-post-card:hover {
  border-color: var(--blog-accent);
  box-shadow: 0 8px 32px rgba(79, 172, 219, 0.12);
}

.blog-post-card:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.blog-post-card h2 {
  color: var(--blog-heading);
  font-size: var(--font-xl);
  font-weight: 600;
  margin: 0 0 var(--space-3);
  line-height: 1.35;
  padding-right: var(--space-8);
  transition: color 0.2s ease;
}

.blog-post-card:hover h2 {
  color: var(--blog-accent);
}

.blog-post-card p {
  color: var(--blog-muted);
  margin: 0 0 var(--space-4);
  line-height: 1.7;
  font-size: var(--font-base);
}

.blog-post-card-meta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-xs);
  color: var(--blog-subtle);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-weight: 500;
}

/* ==========================================================================
   Article Layout - Optimized for reading
   ========================================================================== */

.blog-article {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-8) var(--space-4) var(--space-16);
}

.blog-article-header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--blog-border-light);
}

.blog-article-header h1 {
  font-size: clamp(var(--font-2xl), 4vw, var(--font-4xl));
  font-weight: 700;
  margin-bottom: var(--space-4);
  line-height: 1.2;
  color: var(--blog-heading);
  letter-spacing: -0.02em;
  max-width: var(--reading-width);
}

.blog-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--font-sm);
  color: var(--blog-muted);
}

.blog-article-meta span {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ==========================================================================
   TL;DR Box - Key takeaways
   ========================================================================== */

.tldr-box {
  background: linear-gradient(135deg,
    rgba(79, 172, 219, 0.06) 0%,
    rgba(79, 172, 219, 0.02) 100%
  );
  border: 1.5px solid rgba(79, 172, 219, 0.2);
  border-radius: 12px;
  padding: var(--space-6);
  margin-bottom: var(--space-8);
  max-width: var(--reading-width);
}

.tldr-box h2 {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--blog-accent);
  font-size: var(--font-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 var(--space-4);
  font-weight: 700;
}

.tldr-box h2::before {
  content: '\2728';
  font-size: 1.1em;
}

.tldr-box ul {
  margin: 0;
  padding-left: var(--space-6);
}

.tldr-box li {
  margin-bottom: var(--space-2);
  color: var(--blog-text);
  line-height: 1.65;
  font-size: var(--font-base);
}

.tldr-box li:last-child {
  margin-bottom: 0;
}

.tldr-box li::marker {
  color: var(--blog-accent);
}

/* ==========================================================================
   Article Content - Typography perfected
   ========================================================================== */

.blog-article-content {
  font-size: var(--font-base);
  line-height: 1.8;
  color: var(--blog-text);
}

.blog-article-content > * {
  max-width: var(--reading-width);
}

/* Headings with rhythm */
.blog-article-content h2 {
  font-size: var(--font-2xl);
  font-weight: 700;
  margin: var(--space-12) 0 var(--space-4);
  color: var(--blog-heading);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.blog-article-content h2:first-child {
  margin-top: 0;
}

.blog-article-content h3 {
  font-size: var(--font-xl);
  font-weight: 600;
  margin: var(--space-8) 0 var(--space-3);
  color: var(--blog-heading);
  line-height: 1.35;
}

.blog-article-content h4 {
  font-size: var(--font-lg);
  font-weight: 600;
  margin: var(--space-6) 0 var(--space-2);
  color: var(--blog-heading);
}

/* Paragraphs */
.blog-article-content p {
  margin-bottom: var(--space-6);
  color: var(--blog-text);
}

/* Lists with breathing room */
.blog-article-content ul,
.blog-article-content ol {
  margin: var(--space-6) 0;
  padding-left: var(--space-6);
}

.blog-article-content li {
  margin-bottom: var(--space-2);
  color: var(--blog-text);
  line-height: 1.75;
}

.blog-article-content li::marker {
  color: var(--blog-accent);
}

/* Links - Subtle but clear */
.blog-article-content a {
  color: var(--blog-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 172, 219, 0.3);
  transition: all 0.2s ease;
}

.blog-article-content a:hover {
  color: var(--blog-accent-hover);
  border-bottom-color: var(--blog-accent);
}

/* Strong text */
.blog-article-content strong {
  color: var(--blog-heading);
  font-weight: 600;
}

/* Blockquotes - Distinctive but not distracting */
.blog-article-content blockquote {
  margin: var(--space-8) 0;
  padding: var(--space-4) var(--space-6);
  border-left: 3px solid var(--blog-accent);
  background: var(--blog-bg);
  border-radius: 0 8px 8px 0;
}

.blog-article-content blockquote p {
  margin: 0;
  color: var(--blog-muted);
  font-size: var(--font-base);
  line-height: 1.75;
}

.blog-article-content blockquote strong {
  color: var(--blog-text);
}

/* Inline code */
.blog-article-content code {
  background: var(--blog-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: 'SF Mono', 'Monaco', 'Menlo', monospace;
  color: var(--blog-heading);
}

/* Code blocks */
.blog-article-content pre {
  background: #1a1a2e;
  color: #e2e8f0;
  padding: var(--space-6);
  border-radius: 10px;
  overflow-x: auto;
  margin: var(--space-8) 0;
  max-width: 100%;
  font-size: var(--font-sm);
  line-height: 1.6;
}

.blog-article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Tables - Clean and scannable */
.blog-article-content table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  margin: var(--space-8) 0;
  font-size: var(--font-sm);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--blog-border);
}

.blog-article-content th,
.blog-article-content td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--blog-border-light);
}

.blog-article-content th {
  background: var(--blog-bg);
  font-weight: 600;
  color: var(--blog-heading);
  font-size: var(--font-xs);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.blog-article-content tr:last-child td {
  border-bottom: none;
}

.blog-article-content tbody tr:hover td {
  background: rgba(79, 172, 219, 0.03);
}

/* Horizontal rule */
.blog-article-content hr {
  border: none;
  height: 1px;
  background: var(--blog-border-light);
  margin: var(--space-12) 0;
}

/* ==========================================================================
   FAQ Section - Scannable Q&A
   ========================================================================== */

.faq-section {
  margin-top: var(--space-12);
  padding: var(--space-8);
  background: var(--blog-bg);
  border-radius: 16px;
  border: 1px solid var(--blog-border-light);
}

.faq-section h2 {
  margin: 0 0 var(--space-6);
  padding: 0;
  border: none;
  color: var(--blog-heading);
  font-size: var(--font-xl);
  font-weight: 700;
}

.faq-item {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--blog-border-light);
}

.faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.faq-item h3 {
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--blog-heading);
  margin: 0 0 var(--space-2);
  line-height: 1.5;
}

.faq-item h3::before {
  content: 'Q: ';
  color: var(--blog-accent);
  font-weight: 700;
}

.faq-item p {
  color: var(--blog-muted);
  margin: 0;
  line-height: 1.75;
  font-size: var(--font-sm);
  padding-left: var(--space-6);
}

/* ==========================================================================
   CTA Box - Action without distraction
   ========================================================================== */

.cta-box {
  background: linear-gradient(135deg, var(--blog-warm) 0%, #ff7043 100%);
  border-radius: 16px;
  padding: var(--space-8);
  margin: var(--space-12) 0;
  text-align: center;
  color: #fff;
  box-shadow: 0 12px 40px rgba(255, 138, 101, 0.25);
}

.cta-box h3 {
  color: #fff;
  margin: 0 0 var(--space-2);
  font-size: var(--font-2xl);
  font-weight: 700;
}

.cta-box p {
  color: rgba(255,255,255,0.9);
  margin: 0 0 var(--space-6);
  font-size: var(--font-base);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: #fff;
  color: var(--blog-warm);
  padding: var(--space-4) var(--space-8);
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  font-size: var(--font-base);
  transition: all 0.25s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.cta-button::after {
  content: '\2192';
  transition: transform 0.2s ease;
}

.cta-button:hover::after {
  transform: translateX(4px);
}

/* ==========================================================================
   Related Posts - Continue reading
   ========================================================================== */

.related-posts {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--blog-border-light);
}

.related-posts h2 {
  margin: 0 0 var(--space-6);
  padding: 0;
  border: none;
  font-size: var(--font-lg);
  font-weight: 600;
  color: var(--blog-muted);
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
}

.related-post-card {
  background: var(--blog-surface);
  border: 1.5px solid var(--blog-border-light);
  border-radius: 12px;
  padding: var(--space-6);
  text-decoration: none;
  transition: all 0.2s ease;
}

.related-post-card:hover {
  border-color: var(--blog-accent);
  box-shadow: 0 4px 16px rgba(79, 172, 219, 0.1);
}

.related-post-card h3 {
  color: var(--blog-heading);
  margin: 0 0 var(--space-2);
  font-size: var(--font-base);
  font-weight: 600;
  line-height: 1.4;
}

.related-post-card p {
  color: var(--blog-muted);
  margin: 0;
  font-size: var(--font-sm);
  line-height: 1.6;
}

/* ==========================================================================
   Reading Progress Indicator
   ========================================================================== */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--blog-accent), var(--blog-warm));
  z-index: 9999;
  transition: width 0.1s ease-out;
}

/* ==========================================================================
   Mobile Responsive - Maintain readability
   ========================================================================== */

@media (max-width: 768px) {
  :root {
    --font-base: 1rem;
    --font-lg: 1.0625rem;
    --font-xl: 1.125rem;
    --font-2xl: 1.375rem;
    --font-3xl: 1.625rem;
    --font-4xl: 2rem;
  }

  .blog-hub-header {
    padding: var(--space-8) var(--space-4);
  }

  .blog-article {
    padding: var(--space-4) var(--space-4) var(--space-8);
  }

  .blog-article-header h1 {
    font-size: var(--font-2xl);
  }

  .blog-post-card {
    padding: var(--space-6);
  }

  .blog-post-card::after {
    display: none;
  }

  .blog-post-card h2 {
    font-size: var(--font-lg);
    padding-right: 0;
  }

  .cta-box {
    padding: var(--space-6);
    margin: var(--space-8) 0;
  }

  .cta-box h3 {
    font-size: var(--font-xl);
  }

  .related-posts-grid {
    grid-template-columns: 1fr;
  }

  .faq-section {
    padding: var(--space-6);
  }

  .tldr-box {
    padding: var(--space-4);
  }

  .hub-categories {
    gap: var(--space-2);
  }

  .hub-category {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-xs);
  }

  .blog-article-content h2 {
    font-size: var(--font-xl);
    margin-top: var(--space-8);
  }

  .blog-article-content h3 {
    font-size: var(--font-lg);
  }

  .blog-article-content blockquote {
    margin: var(--space-6) 0;
    padding: var(--space-3) var(--space-4);
  }

  .blog-article-content table {
    font-size: var(--font-xs);
  }

  .blog-article-content th,
  .blog-article-content td {
    padding: var(--space-2) var(--space-3);
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  .breadcrumbs,
  .cta-box,
  .related-posts,
  .reading-progress {
    display: none;
  }

  .blog-article {
    max-width: 100%;
    padding: 0;
  }

  .blog-article-content {
    font-size: 12pt;
    line-height: 1.6;
  }
}

/* ==========================================================================
   Focus States - Accessibility
   ========================================================================== */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--blog-accent);
  outline-offset: 2px;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}