/* ===================================
   BLOG CSS - Beaverly Blog Styles
   Production-grade, modular design
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* Color System - OpenAI-inspired */
  --bg-primary: #0f0f0f;
  --bg-secondary: #171717;
  --bg-tertiary: #1f1f1f;
  --bg-quaternary: #2a2a2a;
  
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-muted: #787878;
  --text-inverse: #0f0f0f;
  
  --accent-primary: #ffffff;
  --accent-secondary: #f0f0f0;
  
  --border-primary: #2a2a2a;
  --border-secondary: #404040;
  --border-accent: #ffffff;
  
  --surface-hover: #252525;
  --surface-active: #2f2f2f;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ===================================
   NAVIGATION
   =================================== */

.nav-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 15, 15, 0.7);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(42, 42, 42, 0.5);
  transition: all 0.3s ease;
}

.nav-scrolled {
  background: rgba(15, 15, 15, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  padding: 0 1rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all 0.2s ease;
  text-decoration: none;
}

.nav-logo:hover {
  color: var(--accent-primary);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--surface-hover);
  text-decoration: none;
}

.nav-cta {
  background: var(--accent-primary);
  color: var(--text-inverse);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
  text-decoration: none;
}

.nav-cta:hover {
  background: var(--accent-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: var(--text-inverse);
}

/* Mobile menu */
.mobile-menu-button {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.mobile-menu-button:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
}

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  padding: 1rem;
  margin: 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hidden-mobile {
  display: flex;
}

.hidden-desktop {
  display: none;
}

@media (max-width: 768px) {
  .hidden-mobile {
    display: none;
  }
  
  .hidden-desktop {
    display: flex;
  }
  
  .mobile-menu-button {
    display: block;
  }
}

/* ===================================
   TYPOGRAPHY - OpenAI-inspired Scale
   =================================== */

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin: 0;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 600;
}

p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  line-height: 1.7;
  margin: 0;
}

.text-large {
  font-size: 1.25rem;
  line-height: 1.7;
}

.text-small {
  font-size: 0.875rem;
  line-height: 1.5;
}

/* Links */
a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: var(--accent-secondary);
  text-decoration: underline;
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ===================================
   LAYOUT CONTAINERS
   =================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ===================================
   SECTION LAYOUTS
   =================================== */

.section {
  padding: 6rem 0;
}

.section-large {
  padding: 8rem 0;
}

.section-small {
  padding: 4rem 0;
}

.section-alt {
  background: var(--bg-secondary);
}

/* Section heading sizes matching TypeScript */
.section h2 {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section h3 {
  font-size: 1.5rem;
  font-weight: 600;
}

.section p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .section {
    padding: 4rem 0;
  }
  
  .section-large {
    padding: 5rem 0;
  }
  
  .section-small {
    padding: 3rem 0;
  }
}

/* ===================================
   HERO SECTIONS
   =================================== */

.hero {
  padding: 6rem 0;
  text-align: center;
  background: var(--bg-primary);
}

.hero-large {
  padding: 8rem 0 6rem;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  align-items: center;
}

@media (max-width: 768px) {
  .hero {
    padding: 4rem 1rem;
  }

  .hero-large {
    padding: 5rem 1rem 4rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ===================================
   CARD COMPONENTS
   =================================== */

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-secondary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-compact {
  padding: 1.5rem;
}

.card-large {
  padding: 3rem;
}

.card-header {
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.card-large .card-title {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.card-description {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.card-large .card-description {
  font-size: 1.125rem;
  line-height: 1.7;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: auto;
}

.card-meta-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.card-meta-item svg {
  width: 16px;
  height: 16px;
}

.card-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.card-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
}

.card:hover .card-tag {
  background: var(--bg-quaternary);
  border-color: var(--border-secondary);
}

.card-footer {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-primary);
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--text-inverse);
  border: 1px solid var(--accent-primary);
}

.btn-primary:hover {
  background: var(--accent-secondary);
  border-color: var(--accent-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--text-inverse);
  text-decoration: none;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-secondary);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
  text-decoration: none;
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Back button */
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.btn-back:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
  text-decoration: none;
}

/* ===================================
   GRID LAYOUTS
   =================================== */

.grid-blog {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

@media (max-width: 768px) {
  .grid-blog {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .grid-blog {
    gap: 1rem;
  }
}

.grid-2col {
  display: grid;
  gap: 3rem;
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 768px) {
  .grid-2col {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.grid-3col {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 1024px) {
  .grid-3col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-3col {
    grid-template-columns: 1fr;
  }
}

/* ===================================
   BLOG POST CONTENT STYLES
   =================================== */

.blog-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-primary);
}

.blog-header-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.blog-header-tag {
  padding: 0.375rem 0.875rem;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-header-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.blog-header-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.blog-header-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.blog-header-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.blog-header-meta-item svg {
  width: 18px;
  height: 18px;
}

/* Blog content article styling */
.blog-content {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.blog-content > * + * {
  margin-top: 1.5rem;
}

.blog-content h1 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-top: 3rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.blog-content h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.blog-content h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.blog-content h4 {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.blog-content p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 1.5rem 0;
}

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

.blog-content p:last-child {
  margin-bottom: 0;
}

.blog-content strong {
  font-weight: 600;
  color: var(--text-primary);
}

.blog-content em {
  font-style: italic;
}

.blog-content a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-decoration-color: var(--border-secondary);
  transition: all 0.2s ease;
}

.blog-content a:hover {
  color: var(--accent-secondary);
  text-decoration-color: var(--accent-secondary);
}

.blog-content ul,
.blog-content ol {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
}

.blog-content ul {
  list-style-type: disc;
}

.blog-content ol {
  list-style-type: decimal;
}

.blog-content li {
  margin: 0.75rem 0;
  line-height: 1.7;
  padding-left: 0.5rem;
}

.blog-content li::marker {
  color: var(--text-muted);
}

.blog-content blockquote {
  margin: 2rem 0;
  padding: 1.5rem 2rem;
  border-left: 4px solid var(--accent-primary);
  background: var(--bg-tertiary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
}

.blog-content blockquote p {
  margin: 0.5rem 0;
  color: var(--text-secondary);
  font-weight: 500;
}

.blog-content blockquote p:first-child {
  margin-top: 0;
}

.blog-content blockquote p:last-child {
  margin-bottom: 0;
}

.blog-content img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin: 2rem 0;
  box-shadow: var(--shadow-lg);
  transition: all 0.3s ease;
}

.blog-content img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-xl);
}

.blog-content img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.blog-content img[loading="lazy"].loaded {
  opacity: 1;
}

.blog-content code {
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
  padding: 0.2rem 0.4rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.blog-content pre {
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.blog-content pre code {
  padding: 0;
  background: none;
  border: none;
  font-size: 0.9rem;
  line-height: 1.6;
}

.blog-content hr {
  margin: 3rem 0;
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
}

/* Video embeds */
.blog-content .video-embed {
  margin: 2rem 0;
  padding: 0;
  background: transparent;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.blog-content .video-embed iframe {
  width: 100%;
  height: 400px;
  border: none;
  border-radius: var(--radius-lg);
}

@media (max-width: 768px) {
  .blog-content .video-embed iframe {
    height: 300px;
  }
}

/* ===================================
   ANIMATIONS
   =================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.fade-in-down {
  animation: fadeInDown 0.6s ease-out;
}

.slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}

.slide-in-right {
  animation: slideInRight 0.6s ease-out;
}

.scale-in {
  animation: scaleIn 0.4s ease-out;
}

/* Animation delays for staggered effects */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }

/* Hover effects */
.hover-lift {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
  transform: translateY(-4px);
}

/* ===================================
   UTILITY CLASSES
   =================================== */

/* Text colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-inverse { color: var(--text-inverse); }

/* Background colors */
.bg-primary { background: var(--bg-primary); }
.bg-secondary { background: var(--bg-secondary); }
.bg-tertiary { background: var(--bg-tertiary); }

/* Border utilities */
.border-primary { border-color: var(--border-primary); }
.border-secondary { border-color: var(--border-secondary); }
.border-t { border-top: 1px solid; }
.border-b { border-bottom: 1px solid; }
.border-l { border-left: 1px solid; }
.border-r { border-right: 1px solid; }

/* Text alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Flex utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-4 { gap: 1rem; }

/* Line clamp utilities */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-clamp: 2;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-clamp: 3;
}

/* Layout utilities */
.max-w-2xl { max-width: 42rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Footer Grid */
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ===================================
   RESPONSIVE UTILITIES
   =================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}