:root {
  --bg-base: #0e0e0e;
  --bg-light: #1a1a1a;
  --bg-dark: #080808;
  --bg-card: #141414;
  --bg-card-hover: #1c1c1c;

  --text-primary: #c8c8c8;
  --text-secondary: #747ca1;
  --text-muted: #51597d;

  --accent: #bb9af7;
  --accent-dim: #9d7cd8;
  --accent-glow: rgba(187, 154, 247, 0.15);

  --vite-blue: #6cb6ff;
  --vite-glow: rgba(108, 182, 255, 0.12);

  --cyan: #7dcfff;
  --green: #9ece6a;
  --orange: #ff9e64;
  --blue: #7aa2f7;

  --border: #222222;
  --border-bright: #363636;

  --radius: 6px;
  --radius-sm: 4px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);

  --font-mono: 'JetBrains Mono', 'SF Mono', 'Menlo', monospace;
  --transition: 0.2s ease;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 64px; }

body {
  font-family: var(--font-mono);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 0.88rem;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.18;
  pointer-events: none;
  z-index: 0;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.header, main, .footer { position: relative; z-index: 1; }

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(14, 14, 14, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.85rem;
}

.logo-prompt { color: var(--accent); }
.logo-path { color: var(--cyan); }

.nav-links { display: flex; gap: 0.2rem; flex-wrap: wrap; justify-content: flex-end; }

.nav-links a {
  color: var(--text-muted);
  font-size: 0.72rem;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  border-color: var(--border);
  background: var(--bg-light);
}

.nav-links a.nav-external {
  color: var(--cyan);
  border-color: rgba(125, 207, 255, 0.2);
  background: rgba(125, 207, 255, 0.05);
}

.nav-links a.nav-external:hover {
  color: var(--text-primary);
  border-color: var(--cyan);
  background: rgba(125, 207, 255, 0.1);
}

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

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

/* Sections */
.section { padding: 5rem 0; }

.section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.section-accent {
  width: 3px;
  height: 1.4rem;
  background: var(--accent);
  border-radius: 1px;
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  font-weight: 600;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 2rem;
  padding-left: 1.125rem;
}

/* Hero */
.hero {
  padding: 7rem 0 4rem;
  position: relative;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 45% at 20% 0%, var(--vite-glow), transparent),
    radial-gradient(ellipse 40% 35% at 85% 20%, var(--accent-glow), transparent);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-terminal {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-dark);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-light);
}

.terminal-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 1px solid var(--border-bright);
}
.terminal-dot--red { background: #ff5370; }
.terminal-dot--yellow { background: #e0af68; }
.terminal-dot--green { background: #9ece6a; }

.hero-terminal-title {
  margin-left: 0.5rem;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.hero-terminal-body { padding: 1.75rem; }

.hero-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.hero-brand img {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.hero-brand h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-brand h1 span { color: var(--vite-blue); }

.hero-tagline {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.hero-meta span {
  font-size: 0.68rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.hero-meta .archive { color: var(--orange); border-color: rgba(255, 158, 100, 0.25); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  border: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.btn-primary {
  background: var(--bg-light);
  color: var(--accent);
  border-color: var(--accent-dim);
}
.btn-primary:hover { background: var(--accent-glow); border-color: var(--accent); }

.btn-secondary {
  color: var(--text-secondary);
  background: transparent;
}
.btn-secondary:hover { color: var(--cyan); border-color: var(--border-bright); background: var(--bg-light); }

.btn-prefix { color: var(--green); }

.hero-visual {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  position: relative;
}

.hero-visual::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--vite-blue);
  z-index: 1;
}

.hero-visual img { width: 100%; height: auto; }

.hero-visual figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  background: var(--bg-dark);
}

/* About */
.about {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 2.5rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.84rem;
}

.about-text p::before { content: '// '; color: var(--text-muted); }

.fact-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.fact-list li {
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  position: relative;
  overflow: hidden;
}

.fact-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent);
}

.fact-list strong { color: var(--cyan); display: block; margin-bottom: 0.15rem; }

/* Cards grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition);
  position: relative;
}

.article-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent);
  opacity: 0.55;
}

.article-card:hover {
  border-color: var(--border-bright);
  background: var(--bg-card-hover);
}

.article-card:hover::before { opacity: 1; }

.article-card img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
}

.article-card img[src*="appducate-round-logo"] {
  object-fit: contain;
  background: var(--bg-dark);
  padding: 2rem;
}

.article-body { padding: 1.15rem 1.15rem 1.15rem 1.35rem; }

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.68rem;
  color: var(--text-muted);
}

.article-meta .tag {
  color: var(--vite-blue);
  border: 1px solid rgba(91, 159, 212, 0.25);
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-sm);
}

.article-card h3 {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.article-card h3::before {
  content: '◆';
  font-size: 0.6rem;
  color: var(--accent);
  flex-shrink: 0;
}

.article-card p {
  color: var(--text-muted);
  font-size: 0.76rem;
  line-height: 1.55;
}

.article-card a.card-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.72rem;
  color: var(--accent);
  transition: color var(--transition);
}

.article-card a.card-link:hover { color: var(--cyan); }

/* Gallery */
.gallery {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.85rem;
}

.gallery-item {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-card);
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition);
}

.gallery-item:hover {
  border-color: var(--border-bright);
  transform: translateY(-2px);
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.gallery-item figcaption {
  padding: 0.55rem 0.65rem;
  font-size: 0.65rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.gallery-item figcaption a {
  color: var(--cyan);
  font-size: 0.62rem;
  white-space: nowrap;
  transition: color var(--transition);
}

.gallery-item figcaption a:hover { color: var(--accent); }

/* Author & social */
.author-section {
  border-bottom: 1px solid var(--border);
}

.author-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.author-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.author-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent);
  opacity: 0.7;
}

.author-card--site::before { background: var(--vite-blue); }

.author-profile {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.author-avatar {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  object-fit: cover;
  flex-shrink: 0;
}

.author-card h3 {
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.author-card p {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.author-card a {
  color: var(--cyan);
  transition: color var(--transition);
}

.author-card a:hover { color: var(--accent); }

.author-handle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.65rem;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.author-status {
  font-size: 0.65rem;
  color: var(--orange);
  margin-top: 0.5rem;
}

.cat-link {
  display: inline;
  color: var(--accent);
  border-bottom: 1px dotted var(--accent-dim);
}

.cat-link:hover { color: var(--cyan); border-color: var(--cyan); }

/* Get started highlight */
.starter-block {
  margin-bottom: 2.5rem;
}

.starter-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  padding-left: 0.25rem;
}

.starter-label span {
  font-size: 0.72rem;
  color: var(--vite-blue);
  font-weight: 600;
}

.starter-label::before {
  content: '';
  width: 3px;
  height: 1rem;
  background: var(--vite-blue);
  border-radius: 1px;
}

.starter-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.article-card.starter-card {
  border-color: rgba(91, 159, 212, 0.35);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(91, 159, 212, 0.04) 100%);
}

.article-card.starter-card::before {
  background: var(--vite-blue);
  opacity: 0.85;
}

.article-card.starter-card h3::before {
  content: none;
}

.starter-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: var(--radius-sm);
  background: rgba(91, 159, 212, 0.15);
  border: 1px solid rgba(91, 159, 212, 0.3);
  color: var(--vite-blue);
  font-size: 0.68rem;
  font-weight: 700;
  margin-right: 0.15rem;
  flex-shrink: 0;
}

.article-card h3 .starter-num { margin-right: 0.35rem; }

.guides-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.guides-divider::before,
.guides-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* Ecosystem */
.eco-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.85rem;
}

.eco-card {
  padding: 1.15rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.eco-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--vite-blue);
  opacity: 0.7;
}

.eco-card h3 {
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
  color: var(--cyan);
}

.eco-card p {
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.eco-card .eco-type {
  font-size: 0.65rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: block;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.lightbox.open {
  opacity: 1;
  pointer-events: all;
}

.lightbox img {
  max-width: min(960px, 100%);
  max-height: 85vh;
  border-radius: var(--radius);
  border: 1px solid var(--border-bright);
}

.lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-mono);
}

.lightbox-caption {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.75rem 0;
  background: var(--bg-dark);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-content p {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.footer-content p::before { content: '# '; color: var(--accent-dim); }

.footer-links { display: flex; gap: 1.25rem; }

.footer-links a {
  font-size: 0.72rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

/* Responsive */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .author-grid { grid-template-columns: 1fr; }
  .starter-grid { grid-template-columns: 1fr; }
}

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

  .nav-links {
    position: fixed;
    top: 56px; left: 0; right: 0;
    background: rgba(14, 14, 14, 0.97);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: 1rem;
    gap: 0.35rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-toggle.open .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open .nav-toggle-bar:nth-child(2) { opacity: 0; }
  .nav-toggle.open .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}