/* ── Design tokens ──────────────────────────────────── */
:root {
  --bg:          #0a0a0f;
  --surface:     #12121a;
  --accent:      #00d4ff;
  --accent2:     #7c3aed;
  --text:        #f0f0f0;
  --text-muted:  #8888aa;
  --border:      rgba(0, 212, 255, 0.2);
  --glow:        0 0 24px rgba(0, 212, 255, 0.25);
  --radius:      12px;
  --font-head:   'Space Grotesk', sans-serif;
  --font-body:   'Inter', sans-serif;
  --font-code:   'Fira Code', monospace;
  --transition:  0.3s ease;
}

/* ── Reset ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; display: block; }

/* ── Utility ─────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}
.section-subtitle {
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 48px;
}
section {
  padding: 96px 0;
}
.divider {
  height: 1px;
  background: var(--border);
  margin: 0 auto;
  max-width: 1100px;
}

/* ── Scroll fade-in ─────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Nav ────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav__logo {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}
.nav__logo span { color: var(--accent); }
.nav nav { display: flex; gap: 32px; }
.nav nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color var(--transition);
}
.nav nav a:hover { color: var(--accent); }

/* ── Hero ───────────────────────────────────────────── */
.hero {
  position: relative;
  padding: 48px 0;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(124, 58, 237, 0.18) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 60%);
  pointer-events: none;
}
/* subtle dot grid overlay */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
.hero__content { position: relative; z-index: 1; max-width: 720px; }
.hero__eyebrow {
  font-family: var(--font-code);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.hero__title {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 16px;
}
.hero__title span { color: var(--accent); }
.hero__tagline {
  font-family: var(--font-head);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--text-muted);
  margin-bottom: 16px;
}
.hero__body {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 0;
}

/* ── Button ─────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 14px 32px;
  background: var(--accent);
  color: #0a0a0f;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 6px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.btn:hover {
  box-shadow: 0 0 32px rgba(0, 212, 255, 0.5);
  transform: translateY(-2px);
}

/* ── Cards ──────────────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 32px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  box-shadow: var(--glow);
  transform: translateY(-4px);
}
.card__icon { font-size: 2rem; margin-bottom: 16px; }
.card h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--accent);
}
.card p { color: var(--text-muted); font-size: 0.95rem; }

/* ── Steps ──────────────────────────────────────────── */
.steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}
.step {
  flex: 1;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.step__connector {
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  align-self: center;
  flex-shrink: 0;
}
.step__num {
  font-family: var(--font-code);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.5;
  margin-bottom: 12px;
  line-height: 1;
}
.step h3 {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.step p { color: var(--text-muted); font-size: 0.9rem; }

@media (max-width: 768px) {
  .steps { flex-direction: column; }
  .step__connector {
    width: 2px;
    height: 32px;
    align-self: center;
    background: linear-gradient(180deg, var(--accent), var(--accent2));
  }
}

/* ── Tiles ──────────────────────────────────────────── */
.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow var(--transition);
}
.tile:hover { box-shadow: var(--glow); }
.tile__icon { font-size: 1.75rem; margin-bottom: 12px; }
.tile h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.tile p { color: var(--text-muted); font-size: 0.875rem; }

/* ── Accordion ──────────────────────────────────────── */
.accordion { max-width: 720px; display: flex; flex-direction: column; gap: 8px; }
.accordion__item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.accordion__trigger {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition);
}
.accordion__trigger::after {
  content: '+';
  color: var(--accent);
  font-size: 1.5rem;
  line-height: 1;
  transition: transform var(--transition);
}
.accordion__trigger[aria-expanded="true"] { color: var(--accent); }
.accordion__trigger[aria-expanded="true"]::after { transform: rotate(45deg); }
.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.accordion__content p {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ── Contact ────────────────────────────────────────── */
.contact { text-align: center; }

/* ── Footer ─────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
@media (max-width: 480px) {
  .footer__inner { flex-direction: column; gap: 12px; text-align: center; }
}

/* ── Blog list page ─────────────────────────────────── */
.blog-list-page { padding: 0 0 96px; }
.blog-list { display: flex; flex-direction: column; gap: 24px; margin-top: 16px; }
.blog-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.blog-card:hover { box-shadow: var(--glow); transform: translateY(-2px); }
.blog-card__title {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}
.blog-card__meta {
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.blog-card__desc { color: var(--text-muted); font-size: 0.95rem; }

/* ── Blog post page ─────────────────────────────────── */
.post-page { padding: 64px 0 96px; max-width: 760px; margin: 0 auto; }
.post-header { margin-bottom: 48px; }
.post-title {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 12px;
}
.post-meta {
  font-family: var(--font-code);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.post-back {
  display: inline-block;
  margin-top: 48px;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.post-back:hover { color: var(--accent); }

/* ── Post content typography ────────────────────────── */
.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
  font-family: var(--font-head);
  font-weight: 700;
  margin: 2em 0 0.75em;
  color: var(--text);
}
.post-content h1 { font-size: 2rem; }
.post-content h2 { font-size: 1.5rem; color: var(--accent); }
.post-content h3 { font-size: 1.2rem; }
.post-content p { margin-bottom: 1.25em; color: var(--text-muted); }
.post-content a { color: var(--accent); text-decoration: underline; }
.post-content ul,
.post-content ol { padding-left: 1.5em; margin-bottom: 1.25em; color: var(--text-muted); }
.post-content li { margin-bottom: 0.4em; }
.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-muted);
}
.post-content code {
  font-family: var(--font-code);
  font-size: 0.875em;
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}
.post-content pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  margin-bottom: 1.5em;
}
.post-content pre code {
  background: none;
  padding: 0;
  font-size: 0.875rem;
  color: var(--text);
}
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5em;
  font-size: 0.9rem;
}
.post-content th,
.post-content td {
  padding: 10px 16px;
  border: 1px solid var(--border);
  text-align: left;
}
.post-content th {
  background: var(--surface);
  color: var(--accent);
  font-family: var(--font-head);
  font-weight: 600;
}

/* ── Game section ───────────────────────────────────── */
/* Overrides section { padding: 96px 0 } — game canvas sits flush below hero */
#game {
  padding: 24px 0 48px; /* 24px top gap between hero and canvas */
}
#game-canvas {
  display: block;
  width: 100%;
  height: 320px; /* matches height="320" attribute */
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: crosshair;
}