/* =======================
   CSS Variables & Reset
   ======================= */
/* Updated: 2025-10-15 */

:root {
  /* Dark Mode Palette (Default) */
  --bg-primary: #0f0f23;
  --bg-secondary: rgba(20, 20, 40, 0.7);
  --bg-elevated: rgba(30, 30, 60, 0.8);
  --text-primary: #ffffff;
  --text-secondary: #e0e0ff;
  --text-tertiary: #a0a0d0;
  --nav-bg: rgba(15, 15, 35, 0.6);

  /* Vibrant Colors */
  --color-purple: #a855f7;
  --color-pink: #ec4899;
  --color-blue: #3b82f6;
  --color-cyan: #06b6d4;
  --color-orange: #f97316;
  --color-yellow: #facc15;

  /* Accent */
  --accent: #a855f7;
  --accent-hover: #c084fc;
  --border: rgba(168, 85, 247, 0.2);

  /* Typography - Modern & Clean */
  --font-heading: 'Sora', system-ui, sans-serif;
  --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}


/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  background-image: url('/assets/bg.webp');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 18px;
  overflow-x: hidden;
  position: relative;
}

/* Fix per API deprecata H1UserAgentFontSizeInSection */
h1 {
  font-size: inherit;
}

section h1 {
  font-size: clamp(3rem, 8vw, 6rem);
}

/* Accessibility: Respect reduced motion preference */
@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;
  }
}

/* =======================
   Skip to Content Link (Accessibility)
   ======================= */

.skip-to-content {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10000;
  background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
  color: #ffffff;
  padding: 1rem 2rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 40px rgba(168, 85, 247, 0.6);
  transition: top var(--transition-base);
  font-family: var(--font-heading);
  white-space: nowrap;
}

.skip-to-content:focus {
  top: var(--spacing-md);
  outline: 3px solid var(--color-cyan);
  outline-offset: 3px;
}

/* =======================
   Navigation (Sticky)
   ======================= */

.nav {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition-base);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: transform var(--transition-base);
  display: inline-flex;
  align-items: center;
}

.nav-logo:hover {
  transform: scale(1.05);
}

.nav-logo-image {
  height: 2.5rem;
  width: auto;
  max-width: 12rem;
  object-fit: contain;
  display: block;
  border-radius: 50%;
}

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all var(--transition-base);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-purple), var(--color-pink));
  transition: width var(--transition-base);
  border-radius: var(--radius-full);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* =======================
   Hero Section
   ======================= */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  position: relative;
}

.hero-container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.hero-content {
  text-align: center;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  margin-bottom: var(--spacing-xl);
}

.hero-name {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 50%, var(--color-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.hero-role {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.01em;
}

.hero-subtitle {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.company-link {
  color: var(--color-cyan);
  text-decoration: none;
  font-weight: 700;
  transition: all var(--transition-base);
  position: relative;
}

.company-link:hover {
  color: var(--color-pink);
  text-shadow: 0 0 20px rgba(236, 72, 153, 0.5);
}

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-xl);
  font-style: italic;
  font-weight: 400;
}

.hero-description {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto var(--spacing-2xl);
  font-weight: 500;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-2xl);
}

/* =======================
   Buttons
   ======================= */

.btn {
  display: inline-block;
  padding: 1.2rem 3rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
  color: var(--text-primary);
  box-shadow: 0 10px 40px rgba(168, 85, 247, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-pink) 0%, var(--color-purple) 100%);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 15px 50px rgba(236, 72, 153, 0.6);
}

/* =======================
   About Section
   ======================= */

.about {
  padding: var(--spacing-3xl) var(--spacing-lg);
  backdrop-filter: blur(10px);
  position: relative;
}

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

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: var(--spacing-2xl);
  text-align: center;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

/* About Profile Image */
.about-profile {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-3xl);
}

.profile-image-wrapper {
  position: relative;
  width: 250px;
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-image {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  position: relative;
  z-index: 2;
  box-shadow: 0 20px 60px rgba(168, 85, 247, 0.4);
  transition: all var(--transition-base);
  border: 4px solid transparent;
  background:
    linear-gradient(var(--bg-primary), var(--bg-primary)) padding-box,
    linear-gradient(135deg, var(--color-purple), var(--color-pink), var(--color-cyan)) border-box;
}

.profile-image-wrapper:hover .profile-image {
  transform: scale(1.05);
  box-shadow: 0 25px 80px rgba(168, 85, 247, 0.6);
}

.profile-ring {
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-purple), var(--color-pink), var(--color-cyan));
  opacity: 0.15;
  z-index: 1;
  animation: pulse-ring 3s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% {
    transform: scale(1);
    opacity: 0.15;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.25;
  }
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.about-text p {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  line-height: 1.9;
  font-weight: 500;
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(168, 85, 247, 0.1);
  transition: all var(--transition-base);
}

.about-text p:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(168, 85, 247, 0.3);
  transform: translateY(-3px);
}

.about-text h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-purple), var(--color-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* =======================
   Contact Section
   ======================= */

.contact {
  padding: var(--spacing-3xl) var(--spacing-lg);
  position: relative;
}

.contact-container {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.contact-description {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  line-height: 1.9;
  max-width: 800px;
  margin: 0 auto var(--spacing-2xl);
  font-weight: 500;
}

.contact-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-lg);
  max-width: 900px;
  margin: 0 auto;
}

.contact-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) var(--spacing-xl);
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.contact-link:hover {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.2) 0%, rgba(236, 72, 153, 0.2) 100%);
  border-color: var(--color-purple);
  transform: translateY(-5px) scale(1.03);
  box-shadow: 0 15px 40px rgba(168, 85, 247, 0.3);
}

.contact-icon {
  width: 28px;
  height: 28px;
  transition: transform var(--transition-base);
}

.contact-link:hover .contact-icon {
  transform: scale(1.2) rotate(5deg);
}

/* =======================
   Footer
   ======================= */

.footer {
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-xl);
  background: var(--nav-bg);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(10px);
  margin-top: var(--spacing-3xl);
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid var(--border);
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--color-purple);
}

.footer-contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-contact-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-base);
  padding: var(--spacing-xs) 0;
}

.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

.contact-icon svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.contact-label {
  color: var(--text-secondary);
}

.footer-contact-link:hover {
  color: var(--color-purple);
}

.footer-contact-link:hover .contact-label {
  color: var(--color-purple);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-license {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.cc-license {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  transition: all var(--transition-base);
}

.cc-license:hover {
  background: var(--bg-elevated);
  border-color: var(--color-purple);
  color: var(--color-purple);
}

.separator {
  color: var(--text-tertiary);
}

.footer-tagline {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  margin: 0;
}

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-license {
    flex-direction: column;
  }
}

/* =======================
   Responsive Design
   ======================= */

@media (max-width: 768px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
    --spacing-2xl: 3.5rem;
    --spacing-3xl: 5rem;
  }

  body {
    font-size: 16px;
  }

  .nav-container {
    padding: 1.25rem var(--spacing-md);
  }

  .nav-logo {
    font-size: 1.6rem;
  }

  .nav-logo-image {
    height: 2rem;
    max-width: 10rem;
  }

  .nav-links {
    gap: var(--spacing-lg);
  }

  .nav-link {
    font-size: 1rem;
  }

  .hero {
    padding: var(--spacing-2xl) var(--spacing-md);
    min-height: calc(100vh - 70px);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 320px;
    padding: 1rem 2rem;
    font-size: 1.1rem;
  }

  .contact-links {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .profile-image-wrapper {
    width: 180px;
    height: 180px;
  }

  .profile-ring {
    top: -15px;
    left: -15px;
    right: -15px;
    bottom: -15px;
  }
}

@media (max-width: 480px) {
  .nav-links {
    gap: var(--spacing-md);
  }

  .nav-link {
    font-size: 0.95rem;
  }

  .nav-logo {
    font-size: 1.4rem;
  }

  .nav-logo-image {
    height: 1.8rem;
    max-width: 8rem;
  }
}

/* =======================
   Blog Section
   ======================= */

.blog-section {
  min-height: 100vh;
  padding: calc(var(--spacing-3xl) + 80px) var(--spacing-lg) var(--spacing-3xl);
  position: relative;
}

.blog-container {
  max-width: 1200px;
  margin: 0 auto;
}

.blog-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.blog-description {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.8;
  font-weight: 500;
}

.blog-posts {
  display: grid;
  gap: var(--spacing-xl);
}

.blog-post-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.blog-post-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(168, 85, 247, 0.4);
  transform: translateY(-5px);
  box-shadow: 0 20px 60px rgba(168, 85, 247, 0.2);
}

.post-date {
  display: inline-block;
  color: var(--text-tertiary);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.post-card-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.post-card-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-base);
  background: linear-gradient(135deg, var(--color-purple), var(--color-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.post-card-title a:hover {
  opacity: 0.8;
}

.post-card-excerpt {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
  font-weight: 400;
}

.post-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(168, 85, 247, 0.1);
}

.post-categories {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.post-category {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(168, 85, 247, 0.25);
  color: #e9d5ff;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid rgba(168, 85, 247, 0.4);
}

.read-more {
  color: #a5f3fc;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.read-more:hover {
  color: #fecdd3;
  transform: translateX(5px);
}

/* =======================
   Single Post
   ======================= */

/* Post Hero Section (Full-screen cover image) */
.post-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.post-hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(15, 15, 35, 0.7) 0%,
    rgba(15, 15, 35, 0.85) 50%,
    rgba(15, 15, 35, 0.95) 100%
  );
  z-index: 1;
}

.post-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.post-hero-date {
  display: block;
  text-align: center;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  margin-bottom: var(--spacing-md);
}

.post-hero-categories {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
}

.post-hero-category {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  color: #ffffff;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255, 255, 255, 0.3);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  transition: all var(--transition-base);
}

.post-hero-category:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.post-hero-reading-time {
  display: block;
  text-align: center;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  font-weight: 500;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  margin-bottom: 0;
}

.post-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, #ffffff 0%, var(--color-purple) 50%, var(--color-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.post-hero-subtitle {
  font-size: clamp(1.3rem, 3vw, 2rem);
  color: #ffffff;
  font-weight: 600;
  line-height: 1.5;
  max-width: 900px;
  margin: 0 auto var(--spacing-md);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

/* Post content adjustments */
.post {
  min-height: 100vh;
  padding: calc(var(--spacing-3xl) + 80px) var(--spacing-lg) var(--spacing-3xl);
}

.post-container {
  max-width: 900px;
  margin: 0 auto;
}

.post-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 2px solid var(--border);
}

.post-header .post-date {
  display: block;
  text-align: center;
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.post-header .post-categories {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.post-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-purple), var(--color-pink), var(--color-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.post-subtitle {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  color: var(--text-secondary);
  font-weight: 600;
  line-height: 1.6;
  max-width: 700px;
  margin: 0 auto;
}

.post-content {
  color: var(--text-secondary);
  font-size: 1.2rem;
  line-height: 1.9;
  font-weight: 400;
}

.post-content h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--spacing-2xl) 0 var(--spacing-lg);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.post-content h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--spacing-xl) 0 var(--spacing-md);
  line-height: 1.4;
}

.post-content p {
  margin-bottom: var(--spacing-lg);
}

.post-content strong {
  color: var(--text-primary);
  font-weight: 700;
}

.post-content em {
  color: var(--text-tertiary);
  font-style: italic;
}

.post-content a {
  color: var(--color-cyan);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-base);
  border-bottom: 2px solid transparent;
}

.post-content a:hover {
  color: var(--color-pink);
  border-bottom-color: var(--color-pink);
}

/* External Link Icon */
.post-content a .external-link-icon {
  display: inline-block;
  margin-left: 0.25rem;
  font-size: 0.85em;
  opacity: 0.7;
  transition: all var(--transition-base);
  vertical-align: super;
  font-style: normal;
  line-height: 0;
}

.post-content a:hover .external-link-icon {
  opacity: 1;
  transform: translate(2px, -2px);
}

.post-content ul,
.post-content ol {
  margin: var(--spacing-lg) 0;
  padding-left: var(--spacing-xl);
}

.post-content li {
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.post-content blockquote {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg) var(--spacing-xl);
  background: rgba(255, 255, 255, 0.03);
  border-left: 4px solid var(--color-purple);
  border-radius: var(--radius-md);
  font-style: italic;
  color: var(--text-tertiary);
}

.post-content code {
  background: rgba(255, 255, 255, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Consolas', 'Courier New', monospace;
  font-size: 0.9em;
  color: var(--color-cyan);
}

.post-content pre {
  background: rgba(0, 0, 0, 0.4);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--spacing-xl) 0;
  border: none;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  position: relative;
}

.post-content pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Syntax highlighting wrapper */
.highlight {
  margin: var(--spacing-xl) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  border: none;
  background: rgba(0, 0, 0, 0.4);
  transition: all var(--transition-base);
}

.highlight:hover {
  box-shadow: 0 12px 40px rgba(168, 85, 247, 0.2);
}

.highlight pre {
  margin: 0;
  padding: var(--spacing-lg);
  border: none;
  box-shadow: none;
  background: transparent;
}

.post-footer {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-2xl);
  border-top: 2px solid var(--border);
}

.post-author {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.author-info {
  max-width: 600px;
  margin: 0 auto;
}

.author-name {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.author-bio {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

.post-navigation {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.nav-post {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-base);
}

.nav-post:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(168, 85, 247, 0.4);
  transform: translateY(-3px);
}

.nav-label {
  color: var(--text-tertiary);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-title {
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
}

.nav-prev .nav-title::before {
  content: '← ';
  color: #e9d5ff;
}

.nav-next {
  text-align: right;
}

.nav-next .nav-title::after {
  content: ' →';
  color: #fbcfe8;
}

.back-to-blog {
  text-align: center;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 2px solid var(--border);
}

.btn-secondary:hover {
  background: rgba(168, 85, 247, 0.15);
  border-color: var(--color-purple);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(168, 85, 247, 0.3);
}

/* =======================
   Blog Responsive
   ======================= */

@media (max-width: 768px) {
  .blog-section,
  .post {
    padding: calc(var(--spacing-2xl) + 70px) var(--spacing-md) var(--spacing-2xl);
  }

  .blog-post-card {
    padding: var(--spacing-lg);
  }

  .post-card-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .post-navigation {
    grid-template-columns: 1fr;
  }

  .nav-next {
    text-align: left;
  }

  .post-content {
    font-size: 1.1rem;
  }

  /* Hero responsive adjustments */
  .post-hero {
    background-attachment: scroll;
  }

  .post-hero-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .post-hero-date {
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
  }

  .post-hero-categories {
    margin-bottom: var(--spacing-lg);
  }

  .post-hero-category {
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem;
  }

  .post-hero-subtitle {
    margin-bottom: var(--spacing-sm);
  }

  .post-hero-reading-time {
    font-size: 0.85rem;
    margin-bottom: 0;
  }

  .post-hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
  }

  .post-hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.4rem);
  }
}

/* =======================
   Utility Classes
   ======================= */

/* =======================
   Pagination
   ======================= */

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl) 0;
}

.pagination-pages {
  display: flex;
  gap: var(--spacing-sm);
}

.pagination-link {
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
  min-width: 44px;
  text-align: center;
}

.pagination-link:hover:not(.disabled):not(.pagination-current) {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.15) 0%, rgba(236, 72, 153, 0.15) 100%);
  border-color: var(--color-purple);
  transform: translateY(-2px);
}

.pagination-current {
  background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
  border-color: var(--color-purple);
  color: white;
}

.pagination-link.disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.pagination-prev,
.pagination-next {
  min-width: 100px;
}

@media (max-width: 768px) {
  .pagination {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  .pagination-prev,
  .pagination-next {
    min-width: 80px;
    font-size: 0.9rem;
  }

  .pagination-link {
    min-width: 38px;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
  }
}

/* =======================
   Related Posts
   ======================= */

.related-posts {
  margin: var(--spacing-2xl) 0;
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.related-posts-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

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

.related-post-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.related-post-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-purple);
  background: var(--bg-elevated);
  box-shadow: 0 8px 24px rgba(168, 85, 247, 0.2);
}

.related-post-date {
  display: block;
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-xs);
  font-family: var(--font-body);
}

.related-post-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.related-post-category {
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.2) 0%, rgba(236, 72, 153, 0.2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: lowercase;
  font-family: var(--font-body);
}

.related-post-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin: var(--spacing-sm) 0;
  line-height: 1.4;
}

.related-post-title a {
  color: var(--text-primary);
  text-decoration: none;
  background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: opacity var(--transition-fast);
}

.related-post-title a:hover {
  opacity: 0.8;
}

.related-post-subtitle {
  font-size: 0.9375rem;
  color: var(--text-tertiary);
  line-height: 1.6;
  margin-top: var(--spacing-sm);
  font-family: var(--font-body);
}

@media (max-width: 768px) {
  .related-posts {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg) 0;
  }

  .related-posts-title {
    font-size: 1.5rem;
  }

  .related-posts-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .related-post-card {
    padding: var(--spacing-md);
  }

  .related-post-title {
    font-size: 1.125rem;
  }
}

/* =======================
   Categories
   ======================= */

.category-breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  font-size: 1rem;
}

.breadcrumb-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-base);
}

.breadcrumb-link:hover {
  color: var(--color-purple);
}

.breadcrumb-separator {
  color: var(--text-tertiary);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

@media (max-width: 768px) {
  .categories-grid {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-md);
  }

  .category-card {
    padding: var(--spacing-md);
  }

  .blog-section {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
}

.category-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.category-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-purple);
  background: var(--bg-elevated);
  box-shadow: 0 10px 40px rgba(168, 85, 247, 0.3);
}

.category-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.category-card-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--color-purple), var(--color-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
}

.category-count {
  background: rgba(168, 85, 247, 0.2);
  color: var(--color-purple);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 700;
  white-space: nowrap;
}

.category-card-preview {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.category-post-preview {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid rgba(168, 85, 247, 0.1);
}

.category-post-preview:last-child {
  border-bottom: none;
}

.preview-title {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-date {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  font-weight: 500;
}

.back-to-categories {
  text-align: center;
  margin-top: var(--spacing-2xl);
}

.no-posts {
  text-align: center;
  padding: var(--spacing-3xl);
  color: var(--text-tertiary);
}

.no-posts p {
  font-size: 1.2rem;
}

@media (max-width: 768px) {
  .categories-grid {
    gap: var(--spacing-lg);
  }

  .category-card {
    padding: var(--spacing-lg);
  }

  .category-card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }

  .category-card-title {
    font-size: 1.25rem;
  }

  .category-post-preview {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }

  .preview-title {
    white-space: normal;
    line-height: 1.4;
  }

  .preview-date {
    font-size: 0.8rem;
  }

  .category-breadcrumb {
    font-size: 0.9rem;
  }
}

/* Make category tags clickable */
.post-category {
  text-decoration: none;
  transition: all var(--transition-base);
}

.post-category:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(168, 85, 247, 0.3);
}

.post-hero-category {
  text-decoration: none;
  cursor: pointer;
}

/* =======================
   Search
   ======================= */

.search-container {
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
}

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.search-wrapper:focus-within {
  border-color: var(--color-purple);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 30px rgba(168, 85, 247, 0.3);
}

.search-icon {
  color: var(--text-tertiary);
  margin-right: var(--spacing-md);
  flex-shrink: 0;
  transition: color var(--transition-base);
}

.search-wrapper:focus-within .search-icon {
  color: var(--color-purple);
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-family: var(--font-body);
  font-weight: 500;
  padding: 0;
  box-shadow: none !important;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.search-input:focus {
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.search-input::-webkit-search-cancel-button {
  display: none;
}

.search-clear {
  background: transparent;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--spacing-xs);
  margin-left: var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-clear:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.search-clear:focus {
  outline: 2px solid var(--color-purple);
  outline-offset: 2px;
}

.search-results-count {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.95rem;
  font-weight: 500;
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  background: rgba(168, 85, 247, 0.1);
  border-radius: var(--radius-md);
}

.search-results-count strong {
  color: var(--color-purple);
  font-weight: 700;
}

.search-no-results {
  text-align: center;
  padding: var(--spacing-3xl);
  color: var(--text-tertiary);
}

.search-no-results h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.search-no-results p {
  font-size: 1.1rem;
}

/* Highlight search matches */
.search-results mark {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.3) 0%, rgba(236, 72, 153, 0.3) 100%);
  color: var(--text-primary);
  padding: 0.1em 0.3em;
  border-radius: 3px;
  font-weight: 600;
}

@media (max-width: 768px) {
  .search-container {
    margin-bottom: var(--spacing-xl);
  }

  .search-wrapper {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .search-input {
    font-size: 1rem;
  }
}

/* =======================
   Reading Progress Bar
   ======================= */

.reading-progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  z-index: 9999;
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.reading-progress-container.visible {
  opacity: 1;
}

.reading-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-purple) 0%, var(--color-pink) 50%, var(--color-cyan) 100%);
  box-shadow: 0 0 10px rgba(168, 85, 247, 0.5);
  transition: width 0.1s ease-out;
  position: relative;
}

.reading-progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 100%;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.3) 100%);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .reading-progress-bar {
    transition: none;
  }

  .reading-progress-bar::after {
    animation: none;
  }
}

/* =======================
   Table of Contents
   ======================= */

.toc-container {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
  max-height: 600px;
  overflow-y: auto;
}

.toc-container:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(168, 85, 247, 0.3);
}

/* Custom scrollbar for TOC */
.toc-container::-webkit-scrollbar {
  width: 6px;
}

.toc-container::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
}

.toc-container::-webkit-scrollbar-thumb {
  background: rgba(168, 85, 247, 0.5);
  border-radius: 3px;
}

.toc-container::-webkit-scrollbar-thumb:hover {
  background: rgba(168, 85, 247, 0.7);
}

.toc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border);
}

.toc-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  background: linear-gradient(135deg, var(--color-purple), var(--color-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.toc-toggle {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.toc-toggle:hover {
  background: rgba(168, 85, 247, 0.15);
  color: var(--text-primary);
}

.toc-toggle:focus {
  outline: 2px solid var(--color-purple);
  outline-offset: 2px;
}

.toc-toggle-icon {
  transition: transform var(--transition-base);
}

.toc-container.collapsed .toc-toggle-icon {
  transform: rotate(-90deg);
}

.toc-nav {
  max-height: 500px;
  overflow-y: auto;
  transition: all var(--transition-base);
}

.toc-container.collapsed .toc-nav {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-item {
  margin: 0;
  transition: all var(--transition-base);
}

.toc-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.5;
  border-left: 3px solid transparent;
  margin-left: 0;
  transition: all var(--transition-base);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.toc-link:hover {
  color: var(--text-primary);
  background: rgba(168, 85, 247, 0.1);
  border-left-color: var(--color-purple);
  transform: translateX(3px);
}

.toc-link.active {
  color: var(--text-primary);
  background: rgba(168, 85, 247, 0.15);
  border-left-color: var(--color-pink);
  font-weight: 700;
}

/* Nested headings (H3) */
.toc-item.toc-h3 .toc-link {
  padding-left: var(--spacing-xl);
  font-size: 0.9rem;
  font-weight: 400;
}

.toc-item.toc-h3 .toc-link:hover {
  border-left-color: var(--color-cyan);
}

.toc-item.toc-h3 .toc-link.active {
  border-left-color: var(--color-cyan);
}

.toc-empty {
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.95rem;
  font-style: italic;
}

/* Responsive TOC */
@media (max-width: 768px) {
  .toc-container {
    padding: var(--spacing-md);
    max-height: 500px;
  }

  .toc-title {
    font-size: 1.1rem;
  }

  .toc-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
  }

  .toc-item.toc-h3 .toc-link {
    padding-left: var(--spacing-lg);
    font-size: 0.85rem;
  }

  .toc-nav {
    max-height: 400px;
  }
}

/* Hide TOC on very small screens if collapsed */
@media (max-width: 480px) {
  .toc-container.collapsed {
    padding-bottom: var(--spacing-md);
  }
}