*, *::before, *::after { box-sizing: border-box; }

/* ── Theme variables ─────────────────────────────────────── */
:root {
  --text:       #7ec88a;
  --muted:      #3d7a4d;
  --border:     #1e4228;
  --bg:         #080c08;
  --surface:    #0d120d;
  --accent:     #33ff57;
  --tag-bg:     #0a1f0a;
  --tag-color:  #7ec88a;
  --dim:        #0f2a0f;
  --glow:       0 0 8px rgba(51, 255, 87, 0.4);
}

[data-theme="light"] {
  --text:       #1a2e1a;
  --muted:      #4a6a4a;
  --border:     #7aaa7a;
  --bg:         #eaf0ea;
  --surface:    #dce8dc;
  --accent:     #1a5a1a;
  --tag-bg:     #c8ddc8;
  --tag-color:  #1a4a1a;
  --dim:        #b8d0b8;
  --glow:       none;
}

/* ── Base ────────────────────────────────────────────────── */
body {
  font-family: Menlo, 'Courier New', Courier, monospace;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  padding: 0;
  /* subtle scanline effect in dark mode */
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
}

[data-theme="light"] body,
[data-theme="light"] {
  background-image: none;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
  text-shadow: var(--glow);
}

/* ── Header / Nav ────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: 0.75rem 0;
}

.site-nav {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-title {
  font-size: 1rem;
  font-weight: bold;
  text-decoration: none;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-shadow: var(--glow);
}

.site-title::before { content: '> '; color: var(--muted); }

/* blinking cursor after title */
.site-title::after {
  content: '_';
  animation: blink 1.1s step-end infinite;
  color: var(--accent);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-links a {
  font-size: 0.8rem;
  color: var(--muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.nav-links a::before { content: '['; }
.nav-links a::after  { content: ']'; }
.nav-links a:hover   { color: var(--accent); text-shadow: var(--glow); text-decoration: none; }

/* ── Theme toggle button ─────────────────────────────────── */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: inherit;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.5rem;
  cursor: pointer;
  line-height: 1.4;
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-shadow: var(--glow);
  box-shadow: var(--glow);
}

/* ── Content wrapper ─────────────────────────────────────── */
.content {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ── Home header ─────────────────────────────────────────── */
.home-header {
  margin-bottom: 2.5rem;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 1.25rem 1.5rem;
}

.home-header::before {
  content: '┌── SYSTEM FEED ──────────────────────────────────────┐';
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
  overflow: hidden;
  white-space: nowrap;
}

.home-header h1 {
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0 0 0.25rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-shadow: var(--glow);
}

.tagline {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}
.tagline::before { content: '// '; }

/* ── Post list ───────────────────────────────────────────── */
.post-list { display: flex; flex-direction: column; gap: 1rem; }

.post-summary {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 1rem 1.25rem;
  position: relative;
}

.post-summary::before {
  content: '>';
  position: absolute;
  left: -1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.post-summary h2 {
  font-size: 1rem;
  font-weight: bold;
  margin: 0 0 0.2rem;
  text-transform: none;
}

.post-summary h2 a {
  color: var(--text);
  text-decoration: none;
}
.post-summary h2 a:hover { color: var(--accent); text-shadow: var(--glow); }

.post-meta {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}
.post-meta::before { content: 'DATE: '; }

.description {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0.2rem 0 0;
}

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

.post-title {
  font-size: 1.5rem;
  font-weight: bold;
  line-height: 1.3;
  margin: 0 0 0.5rem;
  color: var(--accent);
  text-shadow: var(--glow);
  text-transform: uppercase;
}

.post-tags { margin-left: 0.75rem; }

.tag {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--tag-color);
  border: 1px solid var(--border);
  font-size: 0.75rem;
  padding: 0.05rem 0.4rem;
  text-decoration: none;
  margin-right: 0.25rem;
}
.tag::before { content: '#'; }
.tag:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* Post body typography */
.post-content {
  color: var(--text);
}

.post-content h2 {
  font-size: 1.05rem;
  font-weight: bold;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.25rem;
}
.post-content h2::before { content: '## '; color: var(--muted); }

.post-content ul { padding-left: 1.5rem; list-style: none; }
.post-content ul li::before { content: '• '; color: var(--muted); margin-left: -1.25rem; }
.post-content li { margin-bottom: 0.4rem; }

.post-content a { color: var(--accent); }
.post-content a:hover { text-shadow: var(--glow); }

.post-content strong { color: var(--accent); font-weight: bold; }

.post-content code {
  font-family: inherit;
  font-size: 0.9em;
  background: var(--dim);
  border: 1px solid var(--border);
  padding: 0.1em 0.35em;
  color: var(--accent);
}

.post-content pre {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1rem;
  overflow-x: auto;
}
.post-content pre code {
  background: none;
  border: none;
  padding: 0;
}

/* ── Post navigation ─────────────────────────────────────── */
.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}
.post-nav a { color: var(--accent); }
.post-nav a:hover { text-shadow: var(--glow); text-decoration: none; }

/* ── List page ───────────────────────────────────────────── */
.list-header h1 {
  font-size: 1.2rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-shadow: var(--glow);
}
.list-header h1::before { content: '> '; color: var(--muted); }

/* ── Tags page ───────────────────────────────────────────── */
.terms-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
}

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 1.25rem 1.5rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
}
.site-footer::before {
  content: '// ';
}

/* ── Pagination ──────────────────────────────────────────── */
.pagination {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 2rem;
  font-size: 0.85rem;
}
.pagination a { color: var(--accent); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 600px) {
  body { font-size: 14px; }
  .post-title { font-size: 1.2rem; }
  .post-summary::before { display: none; }
  .home-header::before { display: none; }
}