body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  background: radial-gradient(circle at top, #0f172a, var(--bg-main));
  color: var(--text-main);
  line-height: 1.55;
  overflow-x: hidden;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
}

.section-dark {
  background: linear-gradient(to bottom, var(--bg-dark), var(--bg-main));
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.45rem);
  font-weight: 750;
  text-align: center;
  margin-bottom: 0.9rem;
  letter-spacing: -0.02em;
}

.section-lead {
  text-align: center;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(5, 8, 15, 0.68);
  border-bottom: 1px solid var(--border);
  transition: transform var(--transition-medium), background var(--transition-medium);
}

.header.is-scrolled {
  background: rgba(5, 8, 15, 0.84);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.logo span {
  color: var(--green-primary);
}

.nav a {
  margin: 0 1rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-size: 0.92rem;
}

.nav a:hover {
  color: var(--text-main);
}

.footer {
  padding: 3rem 0;
  text-align: center;
  color: var(--text-dark);
}

.fx {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.fx-mouse-glow {
  position: absolute;
  inset: -20%;
  background: radial-gradient(900px 500px at var(--mouse-x) var(--mouse-y),
      rgba(34, 197, 94, 0.18),
      transparent 60%);
  filter: blur(12px);
  opacity: 0.9;
  transition: opacity var(--transition-medium);
}

.fx-noise {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)' opacity='.15'/%3E%3C/svg%3E");
  opacity: 0.12;
  mix-blend-mode: overlay;
}

.fx-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.08;
  mask-image: radial-gradient(circle at 30% 20%, black 0%, transparent 62%);
}

html {
  scroll-behavior: smooth;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%),
      rgba(34, 197, 94, 0.06),
      transparent 35%);
  transition: background 0.2s ease;
  z-index: 0;
}

:focus-visible {
  outline: 2px solid var(--green-primary);
  outline-offset: 3px;
}