:root {
  --bg: #000000;
  --bg-panel: #0a0a0a;
  --bg-term: #050505;
  --phosphor: #33ff66;
  --phosphor-dim: #1a9933;
  --phosphor-glow: rgba(51, 255, 102, 0.45);
  --phosphor-soft: #28cc52;
  --ink-muted: #1f8033;
  --border: rgba(51, 255, 102, 0.35);
  --border-dim: rgba(51, 255, 102, 0.12);
  --max: 1120px;
  --header-h: 56px;
  --font-mono: "JetBrains Mono", "Fira Code", "Consolas", "Courier New", monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 40px);
}

body {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.75;
  color: var(--phosphor);
  background: var(--bg);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.15) 2px,
    rgba(0, 0, 0, 0.15) 4px
  );
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9997;
  background: radial-gradient(ellipse at center, transparent 60%, rgba(0, 0, 0, 0.4) 100%);
}

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

a {
  color: var(--phosphor);
  text-decoration: none;
  text-shadow: 0 0 6px var(--phosphor-glow);
  transition: color 0.2s, text-shadow 0.2s;
}

a:hover {
  color: #66ff88;
  text-shadow: 0 0 12px var(--phosphor-glow);
}

.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

/* ── Header / title bar ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 0 20px rgba(51, 255, 102, 0.08);
}

.title-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  font-size: 0.72rem;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--border-dim);
  letter-spacing: 0.06em;
}

.title-bar-dots {
  display: flex;
  gap: 5px;
}

.title-bar-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid var(--phosphor-dim);
  background: transparent;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
  padding: 0 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--phosphor);
  font-weight: 500;
  font-size: 0.95rem;
  text-shadow: 0 0 8px var(--phosphor-glow);
}

.brand img {
  border: 1px solid var(--border);
  border-radius: 2px;
}

.brand b { color: #66ff88; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--border);
  padding: 6px 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--phosphor);
  box-shadow: 0 0 4px var(--phosphor-glow);
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  padding: 0.25rem 0;
  color: var(--phosphor-soft);
}

.site-nav a::before { content: "./"; opacity: 0.5; }

.site-nav a.active,
.site-nav a:hover {
  color: var(--phosphor);
  text-shadow: 0 0 10px var(--phosphor-glow);
}

/* ── Ads ── */
.ads-top-bar {
  padding: 0.6rem 0;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-dim);
}

.applist-title {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  margin-bottom: 0.4rem;
}

.applist-title::before { content: "> "; }

#ads {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  background: transparent;
  margin: 10px 0;
  gap: 0.5rem;
}

#ads > div,
#ads .ads-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 70px;
  box-sizing: border-box;
}

#ads img {
  width: 65px;
  height: 65px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--border);
  box-shadow: 0 0 12px rgba(51, 255, 102, 0.12);
  transition: transform 180ms ease, box-shadow 180ms ease;
  display: block;
  background: var(--bg-term);
}

#ads a {
  display: inline-block;
  text-decoration: none;
}

#ads img:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 18px var(--phosphor-glow);
}

#ads .caption {
  margin-top: 4px;
  font-size: 10px;
  line-height: 1.3;
  text-align: center;
  color: var(--phosphor-soft);
  max-width: 70px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Terminal blocks ── */
.term-prompt {
  color: var(--ink-muted);
  user-select: none;
}

.term-prompt::before { content: "root@txb-click:~$ "; }

.cursor-blink::after {
  content: "█";
  animation: blink 1s step-end infinite;
  color: var(--phosphor);
  margin-left: 2px;
}

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

.hero-block {
  padding: 2rem 0 1.5rem;
  border-bottom: 1px dashed var(--border-dim);
}

.hero-block h1 {
  font-size: clamp(1.15rem, 3vw, 1.55rem);
  font-weight: 500;
  margin: 0.75rem 0 1rem;
  line-height: 1.45;
  text-shadow: 0 0 14px var(--phosphor-glow);
}

.hero-block .lead {
  color: var(--phosphor-soft);
  margin: 0 0 1rem;
  font-size: 0.92rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.hero-visual img {
  border: 1px solid var(--border);
  box-shadow: 0 0 24px rgba(51, 255, 102, 0.1);
}

.link-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 1rem 0;
  border-bottom: 1px dashed var(--border-dim);
  font-size: 0.85rem;
}

.link-strip a::before { content: "[ext] "; color: var(--ink-muted); }

.chip-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1.25rem 0;
}

.chip-nav a {
  font-size: 0.78rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border);
  background: var(--bg-term);
  letter-spacing: 0.03em;
}

.chip-nav a:hover {
  background: rgba(51, 255, 102, 0.08);
  box-shadow: 0 0 12px rgba(51, 255, 102, 0.15);
}

.section-block {
  padding: 2rem 0;
  border-bottom: 1px dashed var(--border-dim);
}

.term-window {
  background: var(--bg-term);
  border: 1px solid var(--border);
  box-shadow: 0 0 30px rgba(51, 255, 102, 0.06);
}

.term-window-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.85rem;
  font-size: 0.7rem;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--border-dim);
  letter-spacing: 0.08em;
}

.term-window-body {
  padding: 1.25rem 1.35rem 1.5rem;
}

.section-label {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--ink-muted);
  margin-bottom: 0.6rem;
}

.section-label::before { content: "// "; }

.term-window h2 {
  font-size: 1.05rem;
  font-weight: 500;
  margin: 0 0 1rem;
  text-shadow: 0 0 10px var(--phosphor-glow);
}

.prose p { margin: 0 0 1rem; color: var(--phosphor-soft); }
.prose strong { color: var(--phosphor); }
.prose ul, .prose ol { margin: 0 0 1rem; padding-left: 1.4rem; color: var(--phosphor-soft); }
.prose li { margin-bottom: 0.35rem; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: #66ff88;
  background: rgba(51, 255, 102, 0.06);
  padding: 0.1em 0.35em;
  border: 1px solid var(--border-dim);
}

.split-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
  align-items: center;
  margin: 1.25rem 0;
}

.split-row img {
  border: 1px solid var(--border);
  box-shadow: 0 0 16px rgba(51, 255, 102, 0.08);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.25rem 0;
}

.term-card {
  border: 1px solid var(--border-dim);
  background: var(--bg);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.term-card:hover {
  border-color: var(--border);
  box-shadow: 0 0 16px rgba(51, 255, 102, 0.12);
}

.term-card img {
  aspect-ratio: 16/10;
  object-fit: cover;
  width: 100%;
  border-bottom: 1px solid var(--border-dim);
}

.term-card-body { padding: 0.85rem 1rem 1rem; }

.term-card-body h3 {
  margin: 0 0 0.35rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--phosphor);
}

.term-card-body p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--phosphor-soft);
  line-height: 1.6;
}

/* ── Inner pages ── */
.page-hero {
  padding: 1.75rem 0;
  border-bottom: 1px dashed var(--border-dim);
}

.page-hero h1 {
  margin: 0.5rem 0 0;
  font-size: 1.45rem;
  text-shadow: 0 0 12px var(--phosphor-glow);
}

.breadcrumb {
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.breadcrumb a { color: var(--phosphor-soft); }

.related-reading {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px dashed var(--border-dim);
}

.related-reading h2 {
  font-size: 0.92rem;
  margin: 0 0 0.75rem;
  color: var(--phosphor);
}

.related-reading ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.related-reading li {
  margin-bottom: 0.45rem;
  font-size: 0.85rem;
}

.related-reading li::before { content: "→ "; color: var(--ink-muted); }

/* ── Error pages ── */
.error-wrap { text-align: center; padding: 4rem 0; }

.error-wrap .code {
  font-size: 4.5rem;
  color: var(--phosphor);
  margin: 0;
  text-shadow: 0 0 30px var(--phosphor-glow);
}

.error-wrap h1 { margin: 0.5rem 0 1rem; font-size: 1.2rem; }

/* ── Footer ── */
.site-footer {
  margin-top: 1.5rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--border-dim);
  background: var(--bg-panel);
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.75rem;
  margin-bottom: 0.75rem;
}

.footer-links a { color: var(--phosphor-soft); font-size: 0.78rem; }

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

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero-grid, .split-row, .card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    inset: calc(var(--header-h) + 28px) 0 auto 0;
    background: rgba(5, 5, 5, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav ul { flex-direction: column; }

  .site-nav a {
    display: block;
    padding: 0.65rem 0;
    border-bottom: 1px dashed var(--border-dim);
  }

  .ads-top-bar .container { width: 100%; padding-inline: 0.75rem; }

  #ads {
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    justify-content: flex-start;
    -webkit-overflow-scrolling: touch;
  }

  #ads::-webkit-scrollbar { display: none; }

  #ads > div,
  #ads .ads-item {
    width: 84px;
    flex-shrink: 0;
    scroll-snap-align: center;
  }
}