/* ===== CSS Variables ===== */
:root {
  --bg: #06080a;
  --bg-raised: #0c0f13;
  --bg-hover: #111518;
  --bg-surface: #161a1f;
  --border: #1e2329;
  --border-hover: #2a3038;
  --text: #f4f6f8;
  --text-muted: #cdd4dc;
  --text-dim: #96a0ab;
  --green: #00ff41;
  --green-dim: #00cc33;
  --green-glow: rgba(0,255,65,0.15);
  --green-subtle: rgba(0,255,65,0.06);
  --green-bloom: rgba(0,255,65,0.4);
  --amber: #ffb020;
  --cyan: #22d3ee;
  --red: #ef4444;
  --mono: 'JetBrains Mono', 'Menlo', 'Monaco', 'Consolas', monospace;
  --sans: 'Space Grotesk', system-ui, sans-serif;
  --radius: 6px;
}

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

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

body {
  font-family: var(--sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* Scanlines overlay - enhanced */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.08) 2px,
    rgba(0,0,0,0.08) 4px
  );
}

/* Animated scanline sweep */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(0,255,65,0.03) 50%,
    transparent 100%
  );
  height: 100px;
  animation: scanline-sweep 8s linear infinite;
  opacity: 0.5;
}

@keyframes scanline-sweep {
  0% { transform: translateY(-100px); }
  100% { transform: translateY(100vh); }
}

/* CRT vignette and glow */
html::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9997;
  background: radial-gradient(ellipse at center, transparent 0%, rgba(0,0,0,0.3) 100%);
  mix-blend-mode: multiply;
}

::selection {
  background: var(--green);
  color: var(--bg);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

img {
  max-width: 100%;
  height: auto;
}

/* ===== Container ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 760px;
}

/* ===== Navigation ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6,8,10,0.85);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--border);
  height: 56px;
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--text);
}

.logo .highlight {
  color: var(--green);
  text-shadow: 0 0 8px var(--green-glow);
}

.blink {
  animation: blink 1s step-end infinite;
  color: var(--text);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: all 0.15s;
}

.nav-links a:hover {
  color: var(--green);
  background: var(--green-subtle);
  text-shadow: 0 0 8px var(--green-glow);
  box-shadow: 0 0 8px var(--green-glow);
}

.nav-links a.active {
  color: var(--green);
  text-shadow: 0 0 8px var(--green-glow);
}

/* ===== Hero Section ===== */
.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

/* Matrix rain canvas */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 300px at 20% 50%, var(--green-subtle), transparent),
    radial-gradient(ellipse 400px 250px at 80% 30%, rgba(34,211,238,0.03), transparent);
  pointer-events: none;
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.15;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-prompt {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-prompt .shell {
  color: var(--green);
  text-shadow: 0 0 8px var(--green-glow);
  font-weight: 700;
}

.hero-prompt .blink {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: var(--green);
  box-shadow: 0 0 8px var(--green-bloom);
  animation: cursor-blink 1s step-end infinite;
}

@keyframes cursor-blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0.2; }
}

.hero-title {
  font-family: var(--mono);
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
  color: var(--text);
}

.hero-title .highlight {
  color: var(--green);
  text-shadow:
    0 0 8px var(--green),
    0 0 20px var(--green-bloom),
    0 0 40px var(--green-glow),
    0 0 80px var(--green-glow);
  animation: hero-five-flicker 6s infinite;
}

@keyframes hero-five-flicker {
  0%, 85%, 88%, 91%, 100% {
    opacity: 1;
    text-shadow: 0 0 8px var(--green), 0 0 20px var(--green-bloom), 0 0 40px var(--green-glow), 0 0 80px var(--green-glow);
  }
  86% { opacity: 0.25; text-shadow: none; }
  87% { opacity: 1; text-shadow: 0 0 4px var(--green-glow); }
  89% { opacity: 0.1; text-shadow: none; }
  90% { opacity: 1; text-shadow: 0 0 8px var(--green), 0 0 40px var(--green-bloom), 0 0 80px var(--green-glow); }
}

/* ===== Series title letter flicker ===== */
.letter-flicker {
  color: var(--green);
  text-shadow:
    0 0 8px var(--green),
    0 0 20px var(--green-bloom),
    0 0 40px var(--green-glow);
  animation: letter-flicker 7s infinite;
}

@keyframes letter-flicker {
  0%, 82%, 85%, 88%, 100% {
    opacity: 1;
    text-shadow: 0 0 8px var(--green), 0 0 20px var(--green-bloom), 0 0 40px var(--green-glow);
  }
  83% { opacity: 0.2; text-shadow: none; }
  84% { opacity: 1; text-shadow: 0 0 4px var(--green-glow); }
  86% { opacity: 0.1; text-shadow: none; }
  87% { opacity: 1; text-shadow: 0 0 12px var(--green), 0 0 40px var(--green-bloom); }
}

.hero-description {
  max-width: 640px;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.hero-description strong {
  color: var(--text);
  font-weight: 600;
}

.hero-meta {
  display: flex;
  gap: 32px;
  margin-top: 28px;
}

.hero-stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.85rem;
}

.hero-stat .val {
  color: var(--green);
  font-weight: 700;
  font-size: 1.1rem;
}

.hero-stat .lbl {
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
}

/* ===== Posts Section ===== */
.posts-section {
  padding: 64px 0;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 40px;
}

.section-header p {
  display: none;
}

/* ===== Series Group ===== */
.series-group {
  margin-bottom: 48px;
}

.series-group:last-child {
  margin-bottom: 0;
}

.series-group-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.series-group-header h3 {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0;
}

.series-tag {
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--amber);
  background: rgba(255,176,32,0.1);
  padding: 2px 8px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.series-index-link {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--green);
  opacity: 0.7;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.series-index-link:hover {
  opacity: 1;
  text-decoration: underline;
}

/* ===== Post Card ===== */
.post-card {
  display: block;
  padding: 20px 24px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  transition: all 0.2s;
  position: relative;
}

.post-card:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.post-card:hover .read-more {
  opacity: 1;
  color: var(--green);
}

.post-card.pinned {
  border-left: 3px solid var(--green);
  background: linear-gradient(135deg, var(--bg-raised), rgba(0,255,65,0.02));
}

.post-card.pinned:hover {
  border-left-color: var(--green);
}

.pin-badge {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--bg);
  background: var(--green);
  padding: 1px 6px;
  border-radius: 2px;
  letter-spacing: 0.05em;
}

.post-card-content {
  /* No extra padding needed — card itself has padding */
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.post-meta time {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.post-category {
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--cyan);
  background: rgba(34,211,238,0.08);
  padding: 2px 8px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.post-title {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 6px;
}

.post-title a {
  color: var(--text);
  transition: color 0.15s;
}

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

.post-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0;
}

.read-more {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  color: var(--text-dim);
  opacity: 0;
  transition: all 0.2s;
  font-size: 1rem;
}

.read-more .arrow {
  transition: none;
}

/* ===== Categories / Topics Section ===== */
.categories-section {
  padding: 48px 0 72px;
  border-top: 1px solid var(--border);
}

.categories-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.category-tag {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.category-tag:hover {
  border-color: var(--green);
  color: var(--green);
}

.category-tag .count {
  font-size: 0.65rem;
  color: var(--text-dim);
  background: var(--bg);
  padding: 1px 6px;
  border-radius: 3px;
}

/* ===== Post Page ===== */
.post-header {
  padding: 72px 0 40px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.post-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 500px 250px at 30% 60%, var(--green-subtle), transparent);
  pointer-events: none;
}

.post-header .container {
  position: relative;
}

.post-breadcrumb {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.post-breadcrumb::before {
  content: '~/';
  color: var(--green);
  font-weight: 700;
}

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

.post-breadcrumb a {
  color: var(--green);
  transition: all 0.15s;
}

.post-breadcrumb a:hover {
  text-decoration: underline;
  text-shadow: 0 0 8px var(--green-glow);
}

.post-header .post-meta {
  margin-bottom: 16px;
}

.post-header .post-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
}

.post-header .post-page-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.post-series {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.post-series span {
  color: var(--text-dim);
}

.post-series a {
  color: var(--green);
}

.post-series a:hover {
  text-decoration: underline;
}

/* ===== Post Content ===== */
.post-content {
  padding: 56px 0 80px;
}

.post-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 48px 0 16px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.post-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 32px 0 12px;
}

.post-content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 28px 0 12px;
}

.post-content p {
  margin-bottom: 20px;
  color: var(--text-muted);
  line-height: 1.8;
}

.post-content ul, .post-content ol {
  margin: 16px 0;
  padding-left: 24px;
  color: var(--text-muted);
}

.post-content li {
  margin-bottom: 8px;
}

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

.post-content blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 3px solid var(--green);
  background: var(--green-subtle);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-muted);
  font-style: italic;
}

.post-content code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg-surface);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--green);
}

.post-content pre {
  margin: 24px 0;
  padding: 20px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
}

.post-content pre code {
  background: none;
  padding: 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.7;
}

.post-content table {
  width: 100%;
  margin: 24px 0;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.post-content th, .post-content td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--border);
}

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

.post-content td {
  color: var(--text-muted);
}

.post-content img {
  margin: 28px 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.post-content a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ===== Post Footer & Navigation ===== */
.post-footer {
  padding: 0 0 80px;
  border-top: 1px solid var(--border);
  padding-top: 40px;
}

.post-navigation {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
}

.nav-link {
  flex: 1;
  padding: 16px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.15s;
}

.nav-link:hover {
  border-color: var(--green);
}

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

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

.nav-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.nav-title {
  display: block;
  color: var(--text);
  font-weight: 600;
  font-size: 0.9rem;
}

.back-home {
  text-align: center;
}

.back-home a {
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 0.85rem;
}

.back-home a:hover {
  color: var(--green);
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  background: var(--bg-raised);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-brand .logo-text {
  font-weight: 700;
  color: var(--text);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  transition: color 0.15s;
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  margin-top: 24px;
}

.footer-bottom p {
  color: var(--text-dim);
  font-size: 0.8rem;
  font-family: var(--mono);
}

/* ===== Utilities ===== */
.no-posts {
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
}

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

/* ===== Page Layout ===== */
.page-header {
  padding: 72px 0 40px;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
}

.page-content {
  padding: 56px 0 80px;
}

.page-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 40px 0 16px;
}

.page-content p {
  margin-bottom: 20px;
  color: var(--text-muted);
}

.page-content ul {
  margin: 20px 0;
  padding-left: 24px;
  color: var(--text-muted);
}

.page-content li {
  margin-bottom: 8px;
}

.page-content a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero {
    padding: 48px 0 40px;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-meta {
    gap: 20px;
    flex-wrap: wrap;
  }

  .post-header .post-title {
    font-size: 1.75rem;
  }

  .post-navigation {
    flex-direction: column;
  }

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

  .footer-content {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .nav-links a {
    padding: 6px 8px;
    font-size: 0.75rem;
  }
}