/* ==========================================================================
   nbit.center — Animations (CSP-safe, external @keyframes only)
   JS toggles .is-visible / .is-scrolled classes (see landing.js).
   ========================================================================== */

/* ---------- Keyframes ---------- */
@keyframes nb-mesh-drift {
    0%   { background-position: 0% 0%, 100% 0%, 50% 100%; }
    50%  { background-position: 30% 40%, 70% 20%, 40% 60%; }
    100% { background-position: 0% 0%, 100% 0%, 50% 100%; }
}

@keyframes nb-float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-10px); }
}

@keyframes nb-glow-pulse {
    0%, 100% { opacity: 0.7; }
    50%      { opacity: 1; }
}

@keyframes nb-bob {
    0%, 100% { transform: translate(-50%, 0); opacity: 0.7; }
    50%      { transform: translate(-50%, 6px); opacity: 1; }
}

@keyframes nb-spin-slow {
    to { transform: rotate(360deg); }
}

/* ---------- Ambient / continuous ---------- */
.nb-hero__mesh {
    animation: nb-mesh-drift 18s ease-in-out infinite;
}

.nb-hero__scroll {
    animation: nb-bob 2.4s ease-in-out infinite;
}

.nb-card__icon {
    transition: transform 0.3s ease;
}

.nb-card:hover .nb-card__icon {
    transform: translateY(-3px) scale(1.05);
    animation: nb-glow-pulse 1.6s ease-in-out infinite;
}

/* ---------- Scroll reveal (only hides when JS is active) ---------- */
.js .reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.js .reveal.is-visible {
    opacity: 1;
    transform: none;
}

/* Stagger helper: children reveal in sequence */
.js .reveal-stagger > * {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.js .reveal-stagger.is-visible > * {
    opacity: 1;
    transform: none;
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.12s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.19s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.26s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.33s; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 0.40s; }

/* Hero intro (plays on load via .is-ready added by JS) */
.js .nb-hero__inner > * {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.nb-hero.is-ready .nb-hero__inner > * {
    opacity: 1;
    transform: none;
}

.nb-hero.is-ready .nb-hero__inner > *:nth-child(1) { transition-delay: 0.05s; }
.nb-hero.is-ready .nb-hero__inner > *:nth-child(2) { transition-delay: 0.15s; }
.nb-hero.is-ready .nb-hero__inner > *:nth-child(3) { transition-delay: 0.25s; }
.nb-hero.is-ready .nb-hero__inner > *:nth-child(4) { transition-delay: 0.35s; }

/* ---------- Reduced motion: disable all motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .nb-hero__mesh,
    .nb-hero__scroll,
    .nb-card:hover .nb-card__icon {
        animation: none !important;
    }

    .reveal,
    .reveal-stagger > *,
    .nb-hero__inner > * {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}