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

:root {
  --bg-primary: #07091e;
  --bg-secondary: #0c1033;
  --accent-purple: #8b5cf6;
  --accent-blue: #3b82f6;
  --accent-gradient: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  
  /* Text colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dark: #0f172a;
  
  /* Card Backgrounds */
  --card-light-bg: rgba(241, 245, 249, 0.92);
  --card-dark-bg: rgba(15, 23, 42, 0.45);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-border-light: rgba(15, 23, 42, 0.08);
  
  /* Navigation */
  --nav-bg: rgba(241, 245, 249, 0.9);
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container-width: 1200px;
}

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

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 40%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-purple);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header & Nav */
header {
  position: fixed;
  top: 1.5rem;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 9999px;
  padding: 0.5rem 0.75rem 0.5rem 1.5rem;
  width: 90%;
  max-width: 800px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
}

.logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-dark);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  background: var(--text-dark);
  color: #fff;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: #475569;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text-dark);
}

.btn-contact {
  background: var(--text-dark);
  color: #fff !important;
  padding: 0.6rem 1.25rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}

.btn-contact:hover {
  background: #1e293b;
  transform: translateY(-1px);
}

/* Main Hero Section */
.hero {
  padding: 12rem 0 6rem 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
}

.hero-label {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-blue);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-primary);
  max-width: 900px;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero h1 span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2.5rem;
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 4rem;
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.8rem 1.75rem;
  border-radius: 9999px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.btn-primary:hover {
  background: #e2e8f0;
  transform: translateY(-2px);
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  padding: 0.8rem 1.75rem;
  border-radius: 9999px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.4);
}

/* Category Grid Section */
.categories-showcase {
  margin-bottom: 6rem;
}

.section-title {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2rem;
  letter-spacing: 0.1em;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Card Styling - Glassmorphic / Gradient variations */
.card {
  border-radius: 1.25rem;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 320px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

/* Standard Light Glass Card */
.card-light {
  background: var(--card-light-bg);
  border: 1px solid var(--card-border-light);
  color: var(--text-dark);
}

.card-light .card-number {
  color: rgba(15, 23, 42, 0.15);
}

.card-light .card-title {
  color: var(--text-dark);
}

.card-light .card-desc {
  color: #475569;
}

/* Dark Glass Card */
.card-dark {
  background: var(--card-dark-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
}

.card-dark .card-number {
  color: rgba(255, 255, 255, 0.15);
}

.card-dark .card-title {
  color: var(--text-primary);
}

.card-dark .card-desc {
  color: var(--text-secondary);
}

/* Gradient Card (Premium glow) */
.card-gradient {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
}

.card-gradient .card-number {
  color: rgba(255, 255, 255, 0.25);
}

.card-gradient .card-title {
  color: #fff;
}

.card-gradient .card-desc {
  color: rgba(255, 255, 255, 0.85);
}

/* Inner Card Structure */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.card-number {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
}

.card-icon {
  font-size: 1.5rem;
}

.card-body h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.card-desc {
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.card-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.8rem;
  border-radius: 9999px;
  background: rgba(15, 23, 42, 0.05);
  color: #334155;
  transition: var(--transition);
}

.card-dark .card-pill {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

.card-gradient .card-pill {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-light:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Articles List / Grid */
.articles-section {
  padding: 6rem 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 800;
}

.view-all {
  color: var(--accent-blue);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: var(--transition);
}

.view-all:hover {
  color: var(--accent-purple);
}

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

.article-card {
  background: var(--card-dark-bg);
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.article-image {
  height: 200px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.article-category {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  text-transform: uppercase;
}

.article-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.article-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

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

.article-title a:hover {
  color: var(--accent-blue);
}

.article-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-readmore {
  color: var(--text-primary);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.article-readmore:hover {
  color: var(--accent-blue);
}

/* Blog directory layout */
.blog-directory {
  padding-top: 12rem;
  padding-bottom: 6rem;
}

.blog-controls {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.search-bar {
  position: relative;
  width: 100%;
}

.search-input {
  width: 100%;
  padding: 1rem 1.5rem 1rem 3rem;
  background: var(--card-dark-bg);
  border: 1px solid var(--card-border);
  border-radius: 9999px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-purple);
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.2);
}

.search-icon {
  position: absolute;
  left: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.filter-btn {
  background: var(--card-dark-bg);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 0.5rem 1.25rem;
  border-radius: 9999px;
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
}

.filter-btn:hover {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

/* Single Post Layout */
.post-page {
  padding-top: 11rem;
  padding-bottom: 6rem;
}

.post-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 2rem;
  transition: var(--transition);
}

.post-back:hover {
  color: var(--text-primary);
}

.post-header {
  margin-bottom: 3rem;
}

.post-meta-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.post-tag {
  background: var(--accent-gradient);
  color: #fff;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.post-date-time {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.post-header h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.post-hero-image {
  width: 100%;
  height: 450px;
  border-radius: 1.5rem;
  background-size: cover;
  background-position: center;
  margin-bottom: 3rem;
  border: 1px solid var(--card-border);
}

.post-body-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 992px) {
  .post-body-layout {
    grid-template-columns: 3fr 1fr;
  }
}

.post-content {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.post-content p {
  margin-bottom: 1.5rem;
}

.post-content h2 {
  font-size: 1.75rem;
  color: var(--text-primary);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.post-content h3 {
  font-size: 1.35rem;
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.post-content ul, .post-content ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

.post-content li {
  margin-bottom: 0.5rem;
}

/* Syntax Highlighting overrides */
.post-content pre {
  margin: 1.5rem 0;
  border-radius: 0.75rem !important;
  background: #090d16 !important;
  border: 1px solid var(--card-border);
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Reading Progress Bar */
.progress-bar-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.05);
  z-index: 2000;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  transition: width 0.1s ease-out;
}

/* Sidebar for Share/Newsletter */
.post-sidebar {
  position: sticky;
  top: 6rem;
  height: fit-content;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-box {
  background: var(--card-dark-bg);
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  padding: 1.5rem;
}

.sidebar-box h4 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.social-share-buttons {
  display: flex;
  gap: 0.75rem;
}

.btn-share {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
}

.btn-share:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
}

/* Static Newsletter */
.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.newsletter-input {
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.newsletter-submit {
  background: var(--text-primary);
  color: var(--bg-primary);
  border: none;
  padding: 0.75rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.newsletter-submit:hover {
  background: #e2e8f0;
}

/* About Page Specific Styles */
.about-hero {
  padding-top: 12rem;
  padding-bottom: 4rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: start;
}

@media (min-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.about-content h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.about-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.skill-tag {
  background: var(--card-dark-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* Footer styling */
footer {
  border-top: 1px solid var(--card-border);
  padding: 3rem 0;
  margin-top: 6rem;
  text-align: center;
  color: var(--text-muted);
}

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

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

/* Responsive elements */
@media (max-width: 768px) {
  .nav-container {
    padding: 0.5rem 1rem;
  }
  .nav-links {
    display: none; /* simple mobile drawer or just hide for minimal */
  }
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  .hero-buttons a {
    text-align: center;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}