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

/* CSS Custom Variables for Theme */
:root {
  --bg-color: #f1f4f8; /* Cool blue-gray background matching the screenshot */
  --card-bg: #ffffff;
  --text-primary: #1e293b; /* Deep slate */
  --text-secondary: #475569; /* Slate gray */
  --text-muted: #64748b; /* Soft gray */
  --accent-color: #0066cc; /* Premium blue accent */
  --accent-hover: #0052a3;
  --border-color: rgba(0, 0, 0, 0.06);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 18px rgba(0, 0, 0, 0.035), 0 1px 3px rgba(0, 0, 0, 0.015);
  --shadow-hover: 0 12px 24px rgba(0, 0, 0, 0.06), 0 4px 8px rgba(0, 0, 0, 0.03);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

/* Header & Navigation */
.main-header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent-color), #4f46e5);
  border-radius: 6px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.75rem;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.925rem;
  color: var(--text-secondary);
}

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

/* Layout Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Hero Section */
.hero-card {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  padding: 2rem;
  margin-bottom: 2.5rem;
  display: flex;
  gap: 2.5rem;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.hero-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.hero-img {
  flex: 1.2;
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 260px;
  background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
}

.hero-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.post-meta {
  font-size: 0.825rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.post-category {
  background-color: rgba(0, 102, 204, 0.08);
  color: var(--accent-color);
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

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

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

.read-more-btn {
  display: inline-flex;
  align-items: center;
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.9rem;
  gap: 0.25rem;
}

.read-more-btn:hover {
  color: var(--accent-hover);
}

/* Category Filter Tabs */
.filters-container {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.filter-tab {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.5rem 1.25rem;
  border-radius: 30px;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-smooth);
}

.filter-tab:hover {
  background-color: var(--bg-color);
  border-color: rgba(0, 0, 0, 0.15);
}

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

/* Two Column Layout Grid */
.main-layout {
  display: grid;
  grid-template-columns: 2.3fr 1fr;
  gap: 2rem;
  align-items: start;
}

/* Left Column: Post Cards Grid */
.posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.post-card {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  transition: var(--transition-smooth);
}

.post-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.post-card-header {
  margin-bottom: 0.75rem;
}

.post-card-title {
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.post-card-title a:hover {
  color: var(--accent-color);
}

.post-card-excerpt {
  color: var(--text-secondary);
  font-size: 0.925rem;
  margin-bottom: 1.25rem;
}

/* Right Column: Sidebar (Discover More) */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sidebar-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
}

.sidebar-title-link {
  color: var(--accent-color);
  font-size: 0.875rem;
  font-weight: 600;
}

.sidebar-list {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

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

.sidebar-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-icon img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.sidebar-info {
  flex-grow: 1;
}

.sidebar-item-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 0.15rem;
}

.sidebar-item-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.sidebar-badge {
  font-size: 0.75rem;
  font-weight: 500;
  background-color: rgba(0, 0, 0, 0.04);
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  text-transform: capitalize;
}

/* Footer Section */
.main-footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: 3rem 1.5rem;
  margin-top: 5rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

/* Rich Text / Article Details Styling */
.article-container {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
}

.article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.article-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.article-body {
  font-size: 1.05rem;
  color: #334155;
  line-height: 1.75;
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

/* Layman Explanation Box Styling */
.layman-box {
  background-color: rgba(0, 102, 204, 0.04);
  border-left: 4px solid var(--accent-color);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
}

.layman-box-title {
  font-weight: 700;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.layman-box p {
  margin-bottom: 0;
  font-size: 0.975rem;
  color: var(--text-secondary);
}

/* Code Syntax Custom Styles for static blogs */
pre {
  background-color: #0f172a !important; /* Deep slate dark */
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  padding: 1.25rem !important;
  font-size: 0.9rem !important;
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow-x: auto;
}

code {
  font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
  background-color: rgba(0, 0, 0, 0.05);
  color: #e11d48;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-size: 0.875rem;
}

pre code {
  background-color: transparent;
  color: #f8fafc;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
  
  .hero-card {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .hero-img {
    min-height: 200px;
  }
}

@media (max-width: 640px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }
  
  .article-container {
    padding: 2rem 1.25rem;
  }
  
  .article-title {
    font-size: 1.75rem;
  }
}

/* Cookie Consent Banner */
.cookie-banner {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  max-width: 420px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  padding: 1.25rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transform: translateY(150%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cookie-banner.show {
  transform: translateY(0);
}

@media (min-width: 640px) {
  .cookie-banner {
    right: auto; /* Float left on desktop */
  }
}

.cookie-content {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.cookie-content a {
  color: var(--accent-color);
  font-weight: 500;
  text-decoration: underline;
}

.cookie-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

.btn-cookie-accept {
  background-color: var(--text-primary);
  color: var(--card-bg);
  border: none;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-cookie-accept:hover {
  background-color: var(--accent-color);
}

.btn-cookie-decline {
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}

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

/* Contact Form Styling */
.form-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2.5rem;
  margin-top: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  background-color: var(--bg-color);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  transition: var(--transition-smooth);
}

.form-control:focus {
  outline: none;
  background-color: var(--card-bg);
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.btn-primary {
  background-color: var(--accent-color);
  color: var(--card-bg);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

/* Success Toast Notification */
.toast-notification {
  position: fixed;
  top: 2rem;
  right: 2rem;
  background-color: #0f172a;
  color: #ffffff;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 1100;
  transform: translateY(-150%);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
}

.toast-notification.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-icon {
  color: #10b981; /* Success Green */
  display: flex;
  align-items: center;
}