/* EEN Design System — Brand Tokens */
:root {
  --color-primary: #000000;
  --color-accent: #ffffff;
  --color-accent-light: #cccccc;
  --color-bg: #000000;
  --color-surface: #0f0f0f;
  --color-text: #ffffff;
  --color-text-muted: #888888;
  --color-border: rgba(255,255,255,0.1);

  --font-display: 'Hubot Sans', serif;
  --font-body: 'ui-sans-serif', 'system-ui', '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Roboto', 'Noto Sans', 'Ubuntu', 'Cantarell', 'Helvetica Neue', sans-serif;

  --radius-card: 12px;
  --radius-btn: 6px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-card-hover: 0 8px 40px rgba(0,0,0,0.14);

  --transition: 0.22s ease;
}

html {
  scroll-behavior: smooth;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--color-accent);
  color: var(--color-primary);
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  font-family: var(--font-body);
  font-weight: 600;
  text-decoration: none;
  z-index: 10000;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 16px;
}

/* Scroll-fade-in animation */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in-up {
  animation: fadeInUp 0.5s ease forwards;
}
.fade-in-up-hidden {
  opacity: 0;
  transform: translateY(20px);
}
@media (prefers-reduced-motion: reduce) {
  .fade-in-up, .fade-in-up-hidden {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
}

/* Screen-reader only utility */
.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;
}