Advanced Animated Backgrounds

<section class="fx-bg-shapes bg-body border rounded-4 p-4 text-center d-flex flex-column justify-content-center" style="min-height:210px">
  <p class="small text-uppercase fw-semibold mb-1 text-body-secondary">Floating shapes</p>
  <h3 class="h4 fw-bold mb-2">Shop the collection everyone talks about</h3>
  <p class="small mb-3 text-body-secondary">Content stays readable on top of the moving background.</p>
  <div>
    <a href="#" class="btn btn-primary btn-sm">Get started</a>
  </div>
</section>

/* CSS (already in assets/css/effects.css) */
.fx-bg-shapes { position: relative; isolation: isolate; overflow: hidden; }
.fx-bg-shapes::before, .fx-bg-shapes::after { content: ""; position: absolute; pointer-events: none; z-index: -1; }
.fx-bg-shapes::before, .fx-bg-shapes::after { inset: -10%; background-repeat: no-repeat; }
.fx-bg-shapes::before {
  background-image:
    radial-gradient(circle, transparent 0 38%, rgba(var(--wt-primary-rgb), .35) 40% 50%, transparent 52%),
    radial-gradient(circle, rgba(var(--wt-accent-rgb), .35) 0 48%, transparent 50%),
    conic-gradient(from 150deg at 50% 0, rgba(var(--wt-secondary-rgb), .3) 0 60deg, transparent 0);
  background-size: 90px 90px, 34px 34px, 70px 60px;
  background-position: 12% 22%, 82% 18%, 70% 82%;
  animation: fx-bg-shapes-float 12s ease-in-out infinite alternate;
}
.fx-bg-shapes::after {
  background-image:
    linear-gradient(rgba(var(--wt-secondary-rgb), .22), rgba(var(--wt-secondary-rgb), .22)),
    radial-gradient(circle, transparent 0 40%, rgba(var(--wt-accent-rgb), .3) 42% 52%, transparent 54%),
    radial-gradient(circle, rgba(var(--wt-primary-rgb), .3) 0 48%, transparent 50%);
  background-size: 38px 38px, 60px 60px, 22px 22px;
  background-position: 88% 62%, 22% 80%, 45% 12%;
  animation: fx-bg-shapes-turn 18s ease-in-out infinite alternate;
}
@keyframes fx-bg-shapes-float { to { transform: translate(3%, -5%) rotate(6deg); } }
@keyframes fx-bg-shapes-turn { to { transform: translate(-4%, 4%) rotate(-8deg); } }
@media (prefers-reduced-motion: reduce) {
  .fx-bg-shapes, .fx-bg-shapes::before, .fx-bg-shapes::after, .fx-bg-shapes *, .fx-bg-shapes *::before, .fx-bg-shapes *::after { animation: none !important; transition: none !important; }
}

<section class="fx-bg-scrolling bg-body border rounded-4 p-4 text-center d-flex flex-column justify-content-center" style="min-height:210px">
  <p class="small text-uppercase fw-semibold mb-1 text-body-secondary">Scrolling grid</p>
  <h3 class="h4 fw-bold mb-2">New season, new favourites</h3>
  <p class="small mb-3 text-body-secondary">Content stays readable on top of the moving background.</p>
  <div>
    <a href="#" class="btn btn-primary btn-sm">Get started</a>
  </div>
</section>

/* CSS (already in assets/css/effects.css) */
.fx-bg-scrolling { position: relative; isolation: isolate; overflow: hidden; }
.fx-bg-scrolling::before, .fx-bg-scrolling::after { content: ""; position: absolute; pointer-events: none; z-index: -1; }
.fx-bg-scrolling::before {
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--wt-primary-rgb), .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--wt-primary-rgb), .16) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 78%); mask-image: radial-gradient(ellipse at center, #000 30%, transparent 78%);
  animation: fx-bg-scrolling-scroll 6s linear infinite;
}
@keyframes fx-bg-scrolling-scroll { to { background-position: 36px 36px; } }
@media (prefers-reduced-motion: reduce) {
  .fx-bg-scrolling, .fx-bg-scrolling::before, .fx-bg-scrolling::after, .fx-bg-scrolling *, .fx-bg-scrolling *::before, .fx-bg-scrolling *::after { animation: none !important; transition: none !important; }
}

<section class="fx-bg-glitch bg-dark text-white rounded-4 p-4 text-center d-flex flex-column justify-content-center" style="min-height:210px">
  <p class="small text-uppercase fw-semibold mb-1 text-white-50">Glitch</p>
  <h3 class="h4 fw-bold mb-2">Designed to last, priced to love</h3>
  <p class="small mb-3 text-white-50">Content stays readable on top of the moving background.</p>
  <div>
    <a href="#" class="btn btn-primary btn-sm">Get started</a>
  </div>
</section>

/* CSS (already in assets/css/effects.css) */
.fx-bg-glitch { position: relative; isolation: isolate; overflow: hidden; }
.fx-bg-glitch::before, .fx-bg-glitch::after { content: ""; position: absolute; pointer-events: none; z-index: -1; }
.fx-bg-glitch::before {
  inset: 0;
  background: repeating-linear-gradient(0deg, rgba(var(--wt-primary-rgb), .07) 0 2px, transparent 2px 5px);
}
.fx-bg-glitch::after {
  inset: 0;
  background: linear-gradient(90deg, rgba(var(--wt-accent-rgb), .22), rgba(var(--wt-primary-rgb), .22) 50%, rgba(var(--wt-secondary-rgb), .22));
  -webkit-clip-path: inset(50% 0 50% 0); clip-path: inset(50% 0 50% 0);
  animation: fx-bg-glitch-bands 4s steps(1) infinite;
}
@keyframes fx-bg-glitch-bands {
  0%, 70%, 100% { -webkit-clip-path: inset(50% 0 50% 0); clip-path: inset(50% 0 50% 0); transform: none; }
  72% { -webkit-clip-path: inset(12% 0 78% 0); clip-path: inset(12% 0 78% 0); transform: translateX(-3%); }
  75% { -webkit-clip-path: inset(58% 0 30% 0); clip-path: inset(58% 0 30% 0); transform: translateX(4%); }
  78% { -webkit-clip-path: inset(30% 0 62% 0); clip-path: inset(30% 0 62% 0); transform: translateX(-2%); }
  81% { -webkit-clip-path: inset(80% 0 6% 0); clip-path: inset(80% 0 6% 0); transform: translateX(3%); }
  84% { -webkit-clip-path: inset(50% 0 50% 0); clip-path: inset(50% 0 50% 0); }
}
@media (prefers-reduced-motion: reduce) {
  .fx-bg-glitch, .fx-bg-glitch::before, .fx-bg-glitch::after, .fx-bg-glitch *, .fx-bg-glitch *::before, .fx-bg-glitch *::after { animation: none !important; transition: none !important; }
}