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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Ambient background — subtle starfield + brand glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: var(--grad-radial-glow);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(127,198,255,0.35) 50%, transparent 50%),
    radial-gradient(1px 1px at 70% 80%, rgba(127,198,255,0.25) 50%, transparent 50%),
    radial-gradient(1px 1px at 40% 70%, rgba(127,198,255,0.20) 50%, transparent 50%),
    radial-gradient(1px 1px at 85% 15%, rgba(127,198,255,0.30) 50%, transparent 50%),
    radial-gradient(1px 1px at 10% 85%, rgba(127,198,255,0.20) 50%, transparent 50%);
  background-size: 100% 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

main, header, footer { position: relative; z-index: 1; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 var(--space-sm);
  color: var(--color-text);
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.25rem; }

p {
  margin: 0 0 var(--space-sm);
  color: var(--color-text-muted);
}

a {
  color: var(--color-accent-hover);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}
a:hover { color: var(--color-cyan); }

img, svg { max-width: 100%; display: block; }

::selection {
  background: var(--color-accent);
  color: #fff;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.sr-only:focus {
  position: fixed;
  top: var(--space-sm);
  left: var(--space-sm);
  width: auto; height: auto;
  clip: auto;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-card);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  box-shadow: var(--glow-accent);
  z-index: 100;
}

/* Utility */
.gradient-text {
  background: var(--grad-brand);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin-bottom: var(--space-sm);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-spring),
              transform var(--duration-slow) var(--ease-spring);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}