/* =============================================
   ApexLogic — Site Stylesheet
   ============================================= */

:root {
  --bg: #0a0d12;
  --bg-2: #111620;
  --bg-3: #1a2033;
  --text: #e8ecf4;
  --text-muted: #8892a4;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-dim: rgba(59,130,246,0.12);
  --border: rgba(255,255,255,0.08);
  --font-sans: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --max-width: 1100px;
  --radius: 8px;
}

*, *::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-sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Container ──────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Header ─────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(10,13,18,0.92);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo { font-family: var(--font-mono); font-size: 1.15rem; font-weight: 600; letter-spacing: -0.02em; }
.logo-apex { color: var(--text); }
.logo-logic { color: var(--accent); }

.nav { display: flex; gap: 0.25rem; }
.nav-link {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
}
.nav-link:hover, .nav-link.active {
  color: var(--text);
  background: var(--bg-3);
}

/* ── Buttons ─────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  transition: all 0.15s;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-outline {
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: transparent;
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

/* ── Hero ────────────────────────────────────── */
.hero {
  padding: 6rem 0 5rem;
  background:
    radial-gradient(ellipse 80% 60% at 60% -10%, rgba(59,130,246,0.12) 0%, transparent 70%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero-headline {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2rem;
}

.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ── Pillars ─────────────────────────────────── */
.pillars { padding: 5rem 0; }

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.pillar {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: border-color 0.2s, transform 0.2s;
}
.pillar:hover { border-color: rgba(59,130,246,0.4); transform: translateY(-2px); }

.pillar-icon { font-size: 1.75rem; margin-bottom: 1rem; }
.pillar h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; color: var(--text); }
.pillar p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 1rem; }
.pillar-link { font-size: 0.875rem; font-weight: 500; color: var(--accent); }
.pillar-link:hover { color: var(--accent-hover); }

/* ── CTA Band ────────────────────────────────── */
.cta-band {
  padding: 4rem 0;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.cta-band p { font-size: 1.25rem; font-weight: 500; margin-bottom: 1.5rem; color: var(--text); }

/* ── Page ────────────────────────────────────── */
.page-wrap { padding: 4rem 0 6rem; }

.page-header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.page-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text);
}

.page-desc {
  margin-top: 0.5rem;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ── Prose ───────────────────────────────────── */
.prose h2 { font-size: 1.4rem; font-weight: 600; margin: 2rem 0 0.75rem; color: var(--text); }
.prose h3 { font-size: 1.1rem; font-weight: 600; margin: 1.5rem 0 0.5rem; color: var(--text); }
.prose p { color: var(--text-muted); margin-bottom: 1rem; }
.prose a { color: var(--accent); }
.prose a:hover { color: var(--accent-hover); }
.prose ul, .prose ol { color: var(--text-muted); padding-left: 1.5rem; margin-bottom: 1rem; }
.prose li { margin-bottom: 0.3rem; }
.prose strong { color: var(--text); font-weight: 600; }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

.prose ol {
  list-style: none;
  padding-left: 0;
  counter-reset: steps;
}
.prose ol li {
  counter-increment: steps;
  padding-left: 2rem;
  position: relative;
  margin-bottom: 0.6rem;
}
.prose ol li::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0.05em;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Footer ──────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: var(--bg);
}

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

.footer-brand { font-family: var(--font-mono); font-size: 1rem; font-weight: 600; }
.footer-copy { font-size: 0.8rem; color: var(--text-muted); }
.footer-email { font-size: 0.8rem; color: var(--accent); }
.footer-email:hover { color: var(--accent-hover); }

/* ── Responsive ─────────────────────────────── */
@media (max-width: 640px) {
  .nav { gap: 0; }
  .nav-link { padding: 0.4rem 0.5rem; font-size: 0.8rem; }
  .hero { padding: 3.5rem 0 3rem; }
  .footer-inner { flex-direction: column; text-align: center; }
}