/* ===== CSS Variables - Dark Cyber Theme ===== */
:root {
  --bg-deep: #0a0a0f;
  --bg-card: #0d0d14;
  --bg-card-hover: #12121a;
  --border: #1a1a2e;
  --border-glow: rgba(0, 255, 255, 0.3);
  --text: #e0e0e0;
  --text-muted: #8888aa;
  --accent-cyan: #00fff5;
  --accent-magenta: #ff00aa;
  --accent-green: #00ff88;
  --glow-cyan: 0 0 20px rgba(0, 255, 245, 0.4);
  --font-mono: 'JetBrains Mono', monospace;
  --font-display: 'Orbitron', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background: var(--bg-deep);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

/* Noise overlay */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Subtle grid background */
.grid-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 255, 245, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 245, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  text-decoration: none;
  color: var(--accent-cyan);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.15em;
}

.logo-bracket {
  color: var(--accent-magenta);
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-cyan);
  text-shadow: var(--glow-cyan);
}

/* ===== Main ===== */
.main {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem;
  padding-bottom: 4rem;
}

/* Hero */
.hero {
  margin-bottom: 3rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hero-line {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  color: var(--accent-green);
  font-weight: 700;
}

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

/* ===== Posts ===== */
.posts-loading {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.loading-cursor {
  animation: blink 0.8s step-end infinite;
  color: var(--accent-cyan);
}

@keyframes blink {
  50% { opacity: 0; }
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-card {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.post-card:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  box-shadow: var(--glow-cyan);
}

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

.post-date {
  color: var(--accent-magenta);
}

.post-tag {
  padding: 0.2rem 0.5rem;
  background: rgba(0, 255, 245, 0.1);
  color: var(--accent-cyan);
  border-radius: 2px;
  font-size: 0.75rem;
}

.post-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

.post-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== About ===== */
.about {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent-magenta);
  margin-bottom: 1rem;
}

.about-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.about-text code {
  background: var(--bg-card);
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
  color: var(--accent-cyan);
  font-size: 0.85em;
}

/* ===== Footer ===== */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

.footer-text {
  display: block;
  margin-bottom: 0.25rem;
}

/* ===== Post page (single post view) ===== */
.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.post-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  transition: color 0.2s;
}

.post-back:hover {
  color: var(--accent-cyan);
}

.post-content {
  font-size: 1rem;
  line-height: 1.75;
}

.post-content p {
  margin-bottom: 1rem;
}

.post-content h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent-cyan);
  margin: 2rem 0 0.75rem;
}

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

.post-content code {
  background: var(--bg-card);
  padding: 0.15rem 0.4rem;
  border-radius: 2px;
  color: var(--accent-green);
  font-size: 0.9em;
}

.post-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  border-radius: 4px;
}

.post-content pre code {
  background: none;
  padding: 0;
  color: var(--text);
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .header {
    padding: 1rem;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }

  .main {
    padding: 1rem;
  }

  .hero-line {
    font-size: 1.35rem;
  }
}