/* ─── Fonts ─────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ─── Design tokens ─────────────────────────────────────── */
:root {
  --bg:         #0a0e1a;
  --bg-card:    #0f1628;
  --bg-hover:   #141d35;
  --border:     #1e2d4d;
  --border-dim: #162040;
  --accent:     #3b82f6;        /* electric blue */
  --accent-dim: rgba(59,130,246,.12);
  --accent-glow:rgba(59,130,246,.25);
  --text:       #e2e8f0;
  --text-muted: #64748b;
  --text-dim:   #94a3b8;
  --mono:       'JetBrains Mono', monospace;
  --sans:       'Inter', sans-serif;
  --radius:     8px;
  --radius-lg:  14px;
  --nav-h:      64px;
  --max-w:      1100px;
  --transition: 200ms ease;
}

/* ─── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  /* subtle dot-grid texture */
  background-image: radial-gradient(circle, #1e2d4d 1px, transparent 1px);
  background-size: 32px 32px;
  background-attachment: fixed;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ─── Layout helpers ─────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 24px;
}
.section {
  padding-block: 96px;
}

/* ─── NAV ────────────────────────────────────────────────── */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  background: rgba(10,14,26,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dim);
  z-index: 100;
  display: flex;
  align-items: center;
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 24px;
}
.nav__logo {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -.01em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav__logo span { color: var(--accent); }
.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav__links a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: .02em;
  transition: color var(--transition);
  position: relative;
}
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav__links a:hover,
.nav__links a.active { color: var(--text); }
.nav__links a:hover::after,
.nav__links a.active::after { width: 100%; }

/* hamburger */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.nav__burger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-dim);
  border-radius: 2px;
  transition: all var(--transition);
}
.nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* mobile drawer */
.nav__drawer {
  display: none;
  position: fixed;
  inset: var(--nav-h) 0 auto 0;
  background: rgba(10,14,26,.97);
  border-bottom: 1px solid var(--border-dim);
  padding: 24px;
  flex-direction: column;
  gap: 20px;
  z-index: 99;
}
.nav__drawer a {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: .02em;
  transition: color var(--transition);
}
.nav__drawer a:hover,
.nav__drawer a.active { color: var(--text); }
.nav__drawer.open { display: flex; }

/* ─── BUTTONS ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn--primary:hover {
  background: #2563eb;
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  color: var(--text);
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* ─── SECTION LABEL ──────────────────────────────────────── */
.section-label {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--accent);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-label::before { content: '//'; opacity: .5; }

/* ─── FOOTER ─────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border-dim);
  padding-block: 32px;
  text-align: center;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--text-muted);
}
.footer span { color: var(--accent); }

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__burger { display: flex; }
  .section { padding-block: 64px; }
}