/* ── VARIABLES & RESET ── */
:root {
  --bg: #060c16;
  --surface: #0d1825;
  --card: #111f30;
  --border: rgba(0,140,255,0.15);
  --blue: #0066ff;
  --blue-glow: rgba(0,102,255,0.25);
  --teal: #00d4ff;
  --white: #f0f6ff;
  --muted: #6b8aaa;
  --green: #00e882;
  --amber: #ffb800;
  --red: #ff4d6a;
  --font-head: 'Space Grotesk', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── GRID BACKGROUND ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,102,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,102,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

section, nav, footer { position: relative; z-index: 1; }

/* ── TYPOGRAPHY ── */
h1 {
  font-family: var(--font-head);
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
  animation: fadeUp 0.6s 0.1s ease both;
}
h1 .accent { color: var(--blue); }
h1 .accent-teal { color: var(--teal); }

h2 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 20px;
}

.section-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--blue);
  font-weight: 600;
  margin-bottom: 14px;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 56px;
  font-weight: 300;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible { opacity: 1; transform: none; }