/* ═══════════════════════════════════════════════════════════════════════════ */
/* Fusio Foundation Website — Light Theme Styles                             */
/* ═══════════════════════════════════════════════════════════════════════════ */

html {
  scroll-behavior: smooth;
}

::selection {
  background: rgba(8, 145, 178, 0.15);
  color: #0c4a6e;
}

/* ─── Hero grid background ───────────────────────────────────────────────── */
.hero-grid {
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.4) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ─── Fade-in animations (hero) ──────────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s ease forwards;
}

.fade-delay-1 { animation-delay: 0.15s; }
.fade-delay-2 { animation-delay: 0.3s; }
.fade-delay-3 { animation-delay: 0.45s; }

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── Reveal on scroll ───────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Glow effect on Phase 1 dot ─────────────────────────────────────────── */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 6px rgba(6, 182, 212, 0.3); }
  50% { box-shadow: 0 0 16px rgba(6, 182, 212, 0.5); }
}

#roadmap .bg-fusio-500 {
  animation: pulse-glow 2.5s ease-in-out infinite;
}

/* ─── Card hover lift ────────────────────────────────────────────────────── */
.group:hover {
  transform: translateY(-2px);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* ─── Navbar ─────────────────────────────────────────────────────────────── */
#navbar {
  transition: background-color 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
}

#navbar.nav-scrolled {
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

/* ─── Subscript/superscript in formula ───────────────────────────────────── */
sub, sup {
  font-size: 0.65em;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}
sub { bottom: -0.25em; }
sup { top: -0.5em; }

/* ─── Responsive adjustments ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  .hero-grid {
    background-size: 40px 40px;
  }
}

/* ─── Scrollbar styling ──────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #f8fafc;
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}