/* ============================================================================
   Imperial Steaks - animations.css
   SCROLL REVEALS, STICKY-HEADER STATE, BACK-TO-TOP
   ----------------------------------------------------------------------------
   Why this file exists, and why it is deliberately restrained:

   The reference site (tastysteaks.ca) used Elementor entrance animations -
   "fadeInDown" with a 200ms stagger on the hero headings. These reveals carry
   that behaviour over to Imperial Steaks and extend it down the page. Every
   effect here maps onto a stock Elementor control, so none of it needs custom
   code after migration:

     - element reveals  -> Advanced > Motion Effects > Entrance Animation
                           (+ Animation Delay for the stagger)
     - header on scroll -> Advanced > Motion Effects > Sticky + Scroll Effects
     - back to top      -> Elementor "Back to Top" widget

   Only `opacity` and `transform` are animated, so reveals run on the compositor
   and never trigger layout. No parallax, no glassmorphism, no bounce - this is a
   premium meat-trade brand, so the motion is confident and quiet rather than
   showy.

   SAFETY: the hidden state is scoped to `html.reveal-on`, a class added by
   JavaScript. With JavaScript off (or if the script fails) that class is never
   added and every element renders normally. Content is never hidden by CSS alone.
   ========================================================================== */

:root {
  --is-reveal-distance: 32px;
  --is-reveal-duration: 1.15s;
  --is-reveal-ease: cubic-bezier(0.22, 0.61, 0.36, 1);   /* ease-out quint-ish */
  --is-reveal-step: 150ms;                                /* stagger interval   */
}

/* ----------------------------------------------------------------------------
   1. REVEAL BASE
   -------------------------------------------------------------------------- */

.reveal-on [data-reveal] {
  opacity: 0;
  transition: opacity var(--is-reveal-duration) var(--is-reveal-ease),
              transform var(--is-reveal-duration) var(--is-reveal-ease);
  will-change: opacity, transform;
}

/* Direction variants -------------------------------------------------------- */
.reveal-on [data-reveal="up"]    { transform: translateY(var(--is-reveal-distance)); }
.reveal-on [data-reveal="down"]  { transform: translateY(calc(var(--is-reveal-distance) * -1)); }
.reveal-on [data-reveal="left"]  { transform: translateX(calc(var(--is-reveal-distance) * -1)); }
.reveal-on [data-reveal="right"] { transform: translateX(var(--is-reveal-distance)); }
.reveal-on [data-reveal="fade"]  { transform: none; }

/* A slow, slight zoom for feature imagery - 1.05 is deliberately small. */
.reveal-on [data-reveal="zoom"] {
  transform: scale(1.05);
  transition-duration: 1.5s;
}

/* Revealed state ------------------------------------------------------------ */
.reveal-on [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  will-change: auto;
}

/* Stagger: set with data-reveal-delay="1..6" on sibling elements. ------------ */
.reveal-on [data-reveal-delay="1"] { transition-delay: calc(var(--is-reveal-step) * 1); }
.reveal-on [data-reveal-delay="2"] { transition-delay: calc(var(--is-reveal-step) * 2); }
.reveal-on [data-reveal-delay="3"] { transition-delay: calc(var(--is-reveal-step) * 3); }
.reveal-on [data-reveal-delay="4"] { transition-delay: calc(var(--is-reveal-step) * 4); }
.reveal-on [data-reveal-delay="5"] { transition-delay: calc(var(--is-reveal-step) * 5); }
.reveal-on [data-reveal-delay="6"] { transition-delay: calc(var(--is-reveal-step) * 6); }

/* ----------------------------------------------------------------------------
   2. STICKY HEADER STATE
   The header is already sticky; once the page scrolls it tightens up and gains
   a shadow so it separates from imagery passing underneath.
   Elementor: Motion Effects > Sticky > "Effects Offset" + a Scroll state.
   -------------------------------------------------------------------------- */

.imperial-header {
  transition: padding-block var(--is-transition), box-shadow var(--is-transition),
              background-color var(--is-transition);
}

.imperial-header.is-scrolled {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.55);
}

.imperial-header.is-scrolled .imperial-header__inner {
  padding-block: var(--is-space-xs);
}

.imperial-header__inner,
.imperial-header__logo {
  transition: padding-block var(--is-transition), width var(--is-transition);
}

.imperial-header.is-scrolled .imperial-header__logo { width: 120px; }

/* ----------------------------------------------------------------------------
   3. BACK TO TOP
   The reference site had a "Scroll to Top" control; this restores it.
   Elementor: "Back to Top" widget.
   -------------------------------------------------------------------------- */

.imperial-to-top {
  position: fixed;
  right: var(--is-space-md);
  bottom: var(--is-space-md);
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  padding: 0;
  background-color: var(--is-red);
  border: 2px solid var(--is-red);
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  color: var(--is-white);
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  visibility: hidden;
  transition: opacity var(--is-transition), transform var(--is-transition),
              background-color var(--is-transition), visibility var(--is-transition);
}

.imperial-to-top.is-visible {
  opacity: 1;
  transform: none;
  visibility: visible;
}

.imperial-to-top:hover,
.imperial-to-top:focus-visible {
  background-color: var(--is-black-onyx);
  border-color: var(--is-white);
  color: var(--is-white);
}

/* ----------------------------------------------------------------------------
   4. SMALL SCREENS
   Shorter travel so reveals never feel sluggish on a phone.
   -------------------------------------------------------------------------- */

@media (max-width: 767px) {
  :root {
    --is-reveal-distance: 22px;
    --is-reveal-duration: 0.9s;
    --is-reveal-step: 110ms;
  }

  .imperial-to-top {
    width: 42px;
    height: 42px;
    right: var(--is-space-sm);
    bottom: var(--is-space-sm);
  }
}

/* ----------------------------------------------------------------------------
   5. REDUCED MOTION
   Anyone who has asked their system to limit motion gets the finished layout
   with no movement at all - including the reveals, which simply start visible.
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .reveal-on [data-reveal],
  .reveal-on [data-reveal].is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .imperial-to-top { transition: opacity 0.01ms; }
}