/* ===== Zero Trust Blog — Custom Blue Theme ===== */

:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2332;
  --bg-card-hover: #1e2a3d;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --accent-glow-strong: rgba(59, 130, 246, 0.3);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #1e293b;
  --border-hover: #334155;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1100px;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-card);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

pre {
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

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

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.site-logo:hover {
  color: var(--accent-light);
}

.logo-icon {
  font-size: 1.4rem;
  color: var(--accent);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.nav-links a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 5rem 0 3rem;
  text-align: center;
  overflow: hidden;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 550px;
  margin: 0 auto;
  font-weight: 400;
}

.hero-glow {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow-strong) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* ===== Posts Section ===== */
.posts-section {
  padding: 2rem 0 4rem;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-icon {
  font-size: 1.3rem;
}

.view-all {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-light);
  transition: color var(--transition);
}

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

/* ===== Article List (Homepage) ===== */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.article-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition);
}

.article-row:first-child {
  border-top: 1px solid var(--border);
}

.article-row:hover {
  background: var(--accent-glow);
  padding-left: 1.5rem;
  color: var(--text-primary);
}

.article-row-left {
  flex: 1;
  min-width: 0;
}

.article-row-title {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-row:hover .article-row-title {
  color: var(--accent-light);
}

.article-row-summary {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-row-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.article-row-right time {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.article-row-tags {
  display: flex;
  gap: 0.4rem;
}

/* ===== Featured Card ===== */
.featured-card {
  position: relative;
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(59, 130, 246, 0.08) 100%);
  border: 1px solid var(--accent-glow-strong);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
  transition: all var(--transition);
}

.featured-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light), var(--accent));
}

.featured-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(59, 130, 246, 0.15), 0 0 0 1px var(--accent-glow);
}

.featured-card a {
  display: block;
  color: inherit;
  text-decoration: none;
}

.featured-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: white;
  background: var(--accent);
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  z-index: 1;
}

.featured-content {
  padding: 2rem 2rem 2rem;
}

.featured-title {
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.featured-excerpt {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
  max-width: 700px;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* ===== Post Card ===== */
.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}

.post-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 0 1px var(--accent-glow);
}

.post-card a {
  display: block;
  color: inherit;
  text-decoration: none;
}

.post-card-content {
  padding: 1.5rem;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.post-meta time {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.tag {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-light);
  background: var(--accent-glow);
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
}

.post-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.post-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.read-more {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-light);
  transition: color var(--transition);
}

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

/* ===== Single Post ===== */
.single-post {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 0 5rem;
}

.post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.post-title-single {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.post-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.post-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.post-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  letter-spacing: -0.02em;
}

.post-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
}

.post-content p {
  margin-bottom: 1.25rem;
}

.post-content ul,
.post-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
}

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

.post-content blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-glow);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}

.post-content th,
.post-content td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  text-align: left;
}

.post-content th {
  background: var(--bg-card);
  font-weight: 600;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* ===== Post Navigation ===== */
.post-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  color: var(--text-primary);
}

.post-nav-link:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.post-nav-link.next {
  text-align: right;
  grid-column: 2;
}

.nav-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-title {
  font-size: 0.9rem;
  font-weight: 600;
}

/* ===== About / Static Pages ===== */
.page-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 0 5rem;
}

.page-content h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.page-content .content-body {
  font-size: 1.05rem;
  line-height: 1.8;
}

.page-content .content-body p {
  margin-bottom: 1.25rem;
}

.page-content .content-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 3rem;
  list-style: none;
}

.pagination .page-item a,
.pagination .page-item span {
  display: block;
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
}

.pagination .page-item a:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.pagination .page-item.active span {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* ===== Footer ===== */
.site-footer {
  margin-top: auto;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

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

.footer-content p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-tagline {
  margin-top: 0.25rem;
  font-size: 0.8rem !important;
  color: var(--text-muted);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ===== Selection ===== */
::selection {
  background: var(--accent-glow-strong);
  color: var(--text-primary);
}

/* ===== Mobile Responsive ===== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 4rem;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1rem;
  }

  .nav-links.open {
    display: flex;
  }

  .hero {
    padding: 3rem 0 2rem;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .article-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .article-row-title {
    white-space: normal;
  }

  .article-row-summary {
    white-space: normal;
  }

  .article-row-right {
    width: 100%;
    justify-content: space-between;
  }

  .featured-content {
    padding: 1.5rem;
  }

  .featured-title {
    font-size: 1.25rem;
  }

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

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

  .post-nav-link.next {
    grid-column: 1;
    text-align: left;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .post-card-content {
    padding: 1.25rem;
  }
}