/* Shared UI styles: theme, animations, skeleton, mobile menu */
:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary-color: #10b981;
}

/* Light mode overrides using CSS variables already used in pages */
body.light {
  --dark-bg: #ffffff;
  --dark-card: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #334155;
}

/* Adjust certain components when in light mode */
body.light nav {
  background: rgba(255,255,255,0.85) !important;
  border-bottom-color: rgba(99,102,241,0.15) !important;
}
body.light footer {
  background: var(--dark-card) !important;
}
body.light .features,
body.light .security {
  background: var(--dark-card) !important;
}

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* Subtle hover lift utility */
.lift:hover { transform: translateY(-5px); box-shadow: 0 10px 24px rgba(99,102,241,.18); }

/* Page skeleton overlay */
#page-skeleton { position: fixed; inset: 0; background: linear-gradient(90deg, rgba(148,163,184,.15) 25%, rgba(148,163,184,.25) 37%, rgba(148,163,184,.15) 63%); background-size: 400% 100%; animation: shimmer 1.2s infinite; z-index: 2000; }
body.ready #page-skeleton { display: none; }
@keyframes shimmer { 0%{background-position: 200% 0} 100%{background-position: -200% 0} }

/* Theme toggle button */
.theme-toggle { border: 2px solid var(--primary-color); color: var(--primary-color); background: transparent; padding: .5rem .75rem; border-radius: 8px; cursor: pointer; display: inline-flex; align-items: center; gap: .5rem; }
.theme-toggle:hover { background: var(--primary-color); color: #fff; }

/* Mobile menu dropdown */
@media (max-width: 768px) {
  .nav-links.show { display: flex !important; position: absolute; right: 1rem; top: 64px; flex-direction: column; gap: 1rem; background: var(--dark-card); padding: 1rem; border-radius: 12px; border: 1px solid rgba(100,102,241,.15); width: calc(100% - 2rem); left: 1rem; }
  body.light .nav-links.show { background: #ffffff; border-color: rgba(99,102,241,.2); }
}

/* Language select */
.lang-select { border: 2px solid var(--primary-color); background: transparent; color: var(--text-primary); padding: .45rem .6rem; border-radius: 8px; }
body.light .lang-select { color: var(--text-primary); }