/* ─── Global tokens ─────────────────────────────────────── */
:root {
  --bg:      #080818;
  --bg2:     #0d0d28;
  --bg3:     #13133a;
  --blue:    #00aaff;
  --pink:    #ff0066;
  --green:   #00ff88;
  --yellow:  #ffee00;
  --purple:  #bb44ff;
  --text:    #dde0ff;
  --text-dim:#8090b0;
  --border:  #222255;
  --glow-b:  0 0 12px #00aaff88;
  --glow-p:  0 0 12px #ff006688;
  --glow-g:  0 0 12px #00ff8888;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
}

/* scanline overlay — very subtle */
body::before {
  content: '';
  pointer-events: none;
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,.08) 3px,
    rgba(0,0,0,.08) 4px
  );
  z-index: 9999;
}

a { color: var(--blue); text-decoration: none; transition: color .2s, text-shadow .2s; }
a:hover { color: var(--green); text-shadow: var(--glow-g); }

h1, h2, h3, h4 {
  font-family: 'Orbitron', sans-serif;
  letter-spacing: .04em;
}

/* ─── Site-wide top identity bar ────────────────────────── */
.site-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 32px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
}

.site-topbar .site-name {
  font-family: 'VT323', monospace;
  font-size: 1.6rem;
  color: var(--yellow);
  text-shadow: 0 0 14px #ffee0099;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color .2s, text-shadow .2s;
}

.site-topbar .site-name:hover {
  color: #fff;
  text-shadow: 0 0 20px #ffee00cc;
}

.site-topbar .social-links {
  display: flex;
  gap: 18px;
}

.site-topbar .social-links a {
  font-size: .82rem;
  font-family: 'Orbitron', sans-serif;
  letter-spacing: .1em;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 2px;
  transition: color .2s, border-color .2s, box-shadow .2s;
}

.site-topbar .social-links a:hover {
  color: var(--blue);
  border-color: var(--blue);
  box-shadow: var(--glow-b);
  text-shadow: none;
}

/* ─── Navigation bar ────────────────────────────────────── */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg3);
  border-bottom: 2px solid var(--border);
  padding: 0 32px;
}

.site-nav a {
  display: inline-block;
  padding: 12px 24px;
  font-family: 'Orbitron', sans-serif;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 3px solid transparent;
  transition: color .2s, border-color .2s;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
  text-shadow: none;
}

.site-nav a.nav-home:hover,   .site-nav a.nav-home.active   { color: var(--blue);   border-bottom-color: var(--blue); }
.site-nav a.nav-blog:hover,   .site-nav a.nav-blog.active   { color: var(--green);  border-bottom-color: var(--green); }
.site-nav a.nav-secret:hover, .site-nav a.nav-secret.active { color: var(--pink);   border-bottom-color: var(--pink); }

/* ─── Page wrapper ──────────────────────────────────────── */
.page-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

/* ─── Divider ───────────────────────────────────────────── */
.neon-divider {
  height: 1px;
  border: none;
  background: linear-gradient(to right, transparent, var(--blue), var(--purple), var(--pink), transparent);
  margin: 48px 0;
  opacity: .6;
}

/* ─── Section labels ────────────────────────────────────── */
.section-label {
  font-family: 'VT323', monospace;
  font-size: 1.1rem;
  letter-spacing: .2em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 6px;
  opacity: .8;
}

/* ─── Blog post cards ───────────────────────────────────── */
.posts-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
}

.post-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-left: 4px solid var(--blue);
  padding: 22px 26px;
  border-radius: 4px;
  transition: border-left-color .25s, box-shadow .25s, transform .25s;
  position: relative;
  overflow: hidden;
}

.post-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,170,255,.03) 0%, transparent 60%);
  pointer-events: none;
}

.post-card:hover {
  border-left-color: var(--green);
  box-shadow: -4px 0 20px #00ff8822, 0 4px 24px rgba(0,0,0,.4);
  transform: translateX(4px);
}

.post-card .post-meta {
  font-size: .75rem;
  font-family: 'VT323', monospace;
  letter-spacing: .12em;
  color: var(--text-dim);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.post-card .post-meta .tag {
  display: inline-block;
  margin-left: 10px;
  padding: 1px 8px;
  font-size: .7rem;
  border-radius: 2px;
  border: 1px solid currentColor;
}

.post-card .tag-ai     { color: var(--blue); }
.post-card .tag-ml     { color: var(--purple); }
.post-card .tag-tools  { color: var(--green); }
.post-card .tag-notes  { color: var(--yellow); }

.post-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}

.post-card h3 a {
  color: var(--text);
  transition: color .2s;
}

.post-card h3 a:hover {
  color: var(--green);
  text-shadow: none;
}

.post-card .post-excerpt {
  font-size: .9rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.post-card .read-more {
  display: inline-block;
  margin-top: 12px;
  font-size: .8rem;
  font-family: 'Orbitron', sans-serif;
  letter-spacing: .1em;
  color: var(--blue);
  transition: color .2s, text-shadow .2s;
}

.post-card .read-more:hover {
  color: var(--green);
  text-shadow: var(--glow-g);
}

/* ─── Hero section ──────────────────────────────────────── */
.hero {
  padding: 64px 0 40px;
  position: relative;
}

.hero-greeting {
  font-family: 'VT323', monospace;
  font-size: 4.5rem;
  line-height: 1;
  margin-bottom: 4px;
  color: var(--text);
}

.hero-greeting .cursor {
  display: inline-block;
  width: 3px;
  height: .85em;
  background: var(--green);
  margin-left: 4px;
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

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

.hero-subtitle {
  font-family: 'Orbitron', sans-serif;
  font-size: .85rem;
  letter-spacing: .18em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 28px;
  text-shadow: var(--glow-b);
}

.hero-bio {
  font-size: 1rem;
  color: var(--text-dim);
  max-width: 620px;
  line-height: 1.8;
}

.hero-bio strong {
  color: var(--text);
}

/* ─── Blog list page ────────────────────────────────────── */
.page-title {
  font-size: 2rem;
  margin-bottom: 6px;
  color: var(--text);
}

.page-title-accent {
  color: var(--green);
}

/* ─── Single post page ──────────────────────────────────── */
.post-header {
  margin-bottom: 32px;
}

.post-header h1 {
  font-size: 1.8rem;
  line-height: 1.25;
  margin-bottom: 10px;
  color: var(--text);
}

.post-body {
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1.85;
  max-width: 680px;
}

.post-body h2 {
  font-size: 1.15rem;
  color: var(--text);
  margin: 36px 0 12px;
}

.post-body p { margin-bottom: 18px; }

.post-body blockquote {
  border-left: 3px solid var(--purple);
  padding: 10px 20px;
  margin: 24px 0;
  background: var(--bg3);
  border-radius: 0 4px 4px 0;
  color: var(--text);
  font-style: italic;
}

.post-body a { color: var(--blue); }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Orbitron', sans-serif;
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--text-dim);
  margin-bottom: 32px;
  transition: color .2s;
}

.back-link:hover { color: var(--blue); text-shadow: none; }

/* ─── Secret page ───────────────────────────────────────── */
.secret-terminal {
  max-width: 480px;
  margin: 64px auto;
  background: var(--bg2);
  border: 1px solid var(--pink);
  border-radius: 4px;
  padding: 36px 32px;
  box-shadow: 0 0 40px #ff006622;
}

.secret-terminal .term-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.secret-terminal .term-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.term-dot-r { background: #ff5f57; }
.term-dot-y { background: #febc2e; }
.term-dot-g { background: #28c840; }

.secret-terminal h2 {
  font-family: 'VT323', monospace;
  font-size: 1.4rem;
  letter-spacing: .12em;
  color: var(--pink);
  text-shadow: var(--glow-p);
  margin-bottom: 6px;
}

.secret-terminal .term-prompt {
  font-family: 'VT323', monospace;
  font-size: 1rem;
  color: var(--text-dim);
  margin-bottom: 20px;
  letter-spacing: .06em;
}

.secret-terminal input[type="password"],
.secret-terminal input[type="text"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 10px 14px;
  color: var(--green);
  font-family: 'VT323', monospace;
  font-size: 1.15rem;
  letter-spacing: .1em;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  margin-bottom: 16px;
}

.secret-terminal input:focus {
  border-color: var(--pink);
  box-shadow: var(--glow-p);
}

.secret-terminal button {
  width: 100%;
  padding: 10px;
  background: transparent;
  border: 2px solid var(--pink);
  border-radius: 2px;
  color: var(--pink);
  font-family: 'Orbitron', sans-serif;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background .2s, color .2s, box-shadow .2s;
}

.secret-terminal button:hover {
  background: var(--pink);
  color: var(--bg);
  box-shadow: var(--glow-p);
}

.term-error {
  font-family: 'VT323', monospace;
  font-size: 1rem;
  color: var(--pink);
  margin-top: 14px;
  min-height: 1.4em;
  letter-spacing: .06em;
}

.secret-unlocked {
  display: none;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.secret-unlocked.visible { display: block; }

.secret-unlocked h3 {
  font-family: 'VT323', monospace;
  font-size: 1.3rem;
  color: var(--green);
  text-shadow: var(--glow-g);
  margin-bottom: 14px;
  letter-spacing: .1em;
}

.secret-unlocked .secret-link-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.secret-unlocked .secret-link-list a {
  display: block;
  padding: 12px 18px;
  background: var(--bg3);
  border: 1px solid var(--green);
  border-radius: 2px;
  color: var(--green);
  font-family: 'Orbitron', sans-serif;
  font-size: .8rem;
  letter-spacing: .1em;
  transition: background .2s, box-shadow .2s;
}

.secret-unlocked .secret-link-list a:hover {
  background: #00ff8815;
  box-shadow: var(--glow-g);
  text-shadow: none;
  color: var(--green);
}

/* ─── Footer ────────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 28px;
  border-top: 1px solid var(--border);
  font-family: 'VT323', monospace;
  font-size: .9rem;
  color: var(--text-dim);
  letter-spacing: .1em;
  background: var(--bg2);
}

.site-footer .footer-pixel {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--blue);
  margin: 0 4px;
  animation: blink 2s step-end infinite;
}

/* ─── Utility ───────────────────────────────────────────── */
.highlight-blue   { color: var(--blue); }
.highlight-green  { color: var(--green); }
.highlight-pink   { color: var(--pink); }
.highlight-yellow { color: var(--yellow); }

/* ─── Responsive ────────────────────────────────────────── */
@media (max-width: 600px) {
  .site-topbar { flex-direction: column; gap: 10px; text-align: center; }
  .site-nav { padding: 0 12px; }
  .site-nav a { padding: 10px 14px; font-size: .7rem; }
  .hero-greeting { font-size: 3rem; }
  .page-content { padding: 36px 16px 60px; }
  .secret-terminal { margin: 36px 16px; padding: 24px 20px; }
}