/* =====================================================================
   Guangxing Elementary — site-wide motion layer  (motion.css)
   Tuned copy of the Hub motion layer. Loaded on EVERY Guangxing page to
   add scroll-reveal, living hero, an animated top-nav underline and
   micro-interactions — without touching typography, colors or layout.

   All initial-hidden states are applied by motion.js ONLY, so if JS is
   absent (or prefers-reduced-motion is on) every page renders fully
   visible. Accent = Guangxing cane-green → gold.
   ===================================================================== */

:root{
  --mo-accent: #316821;   /* cane-deep green */
  --mo-accent2: #c89a3a;  /* guangxing gold  */
}

/* ---- scroll progress bar ---------------------------------------- */
#mo-progress{
  position:fixed;top:0;left:0;height:3px;width:0;z-index:3000;
  background:linear-gradient(90deg,var(--mo-accent),var(--mo-accent2));
  box-shadow:0 0 12px rgba(0,0,0,.18);
  transition:width .12s linear;pointer-events:none;
}

/* ---- scroll-reveal: base + directional variants ----------------- */
.mo{
  opacity:0;will-change:opacity,transform,filter;
  transition:opacity .82s cubic-bezier(.16,.8,.24,1),
             transform .82s cubic-bezier(.16,.8,.24,1),
             filter .82s ease;
}
.mo-up{transform:translateY(46px);}
.mo-left{transform:translateX(-54px);}
.mo-right{transform:translateX(54px);}
.mo-zoom{transform:scale(.88);}
.mo-blur{filter:blur(12px);transform:translateY(26px);}
.mo.mo-in{opacity:1;transform:none;filter:none;}

/* ---- hero: staggered entrance of headline content --------------- */
.mo-hero{position:relative;z-index:2;}
.mo-hero > *:not(.mo-orbs){
  position:relative;z-index:1;
  opacity:0;transform:translateY(26px);filter:blur(6px);
  animation:moHeroIn .95s cubic-bezier(.2,.7,.2,1) both;
}
@keyframes moHeroIn{to{opacity:1;transform:none;filter:none;}}

/* ---- hero: drifting ambient light blooms (pure decoration) ------
   White light blooms read as gentle ambient light on ANY colored
   banner, so they never clash with a page's own palette. --------- */
.mo-orbs{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:0;}
.mo-orb{
  position:absolute;border-radius:50%;filter:blur(34px);opacity:.30;
  background:radial-gradient(circle at 35% 35%,#fff,transparent 70%);
  animation:moDrift ease-in-out infinite;
}
@keyframes moDrift{
  0%{transform:translate(0,0) scale(1);}
  50%{transform:translate(var(--dx,30px),var(--dy,-26px)) scale(1.24);}
  100%{transform:translate(0,0) scale(1);}
}

/* ---- top-nav: animated underline sweep -------------------------- */
.topbar-nav a{position:relative;}
.topbar-nav a::after{
  content:"";position:absolute;left:14px;right:100%;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--mo-accent),var(--mo-accent2));
  transition:right .32s cubic-bezier(.2,.7,.2,1);
}
.topbar-nav a:hover::after,
.topbar-nav a.is-active::after{right:14px;}

/* ---- card hover lift (generic across page families) ------------- */
.mo-lift{transition:transform .32s cubic-bezier(.2,.7,.2,1),box-shadow .32s,border-color .32s;}
.mo-lift:hover{transform:translateY(-8px);}

/* ---- back-to-top floating button -------------------------------- */
#mo-top{
  position:fixed;right:22px;bottom:22px;z-index:2000;
  width:48px;height:48px;border:0;cursor:pointer;border-radius:50%;
  background:var(--mo-accent);color:#fff;
  font-size:23px;line-height:46px;text-align:center;font-family:inherit;
  box-shadow:0 10px 26px -8px rgba(0,0,0,.45);
  opacity:0;transform:translateY(22px) scale(.6);pointer-events:none;
  transition:opacity .3s,transform .3s,background .25s;
}
#mo-top.mo-show{opacity:.96;transform:none;pointer-events:auto;}
#mo-top:hover{background:var(--mo-accent2);transform:translateY(-3px) scale(1.05);}

/* ---- speak / pronunciation buttons: pulse while playing --------- */
.speak.mo-playing,.ln__speak.mo-playing,.chip-say.mo-playing{animation:moPulse .85s ease infinite;}
@keyframes moPulse{0%,100%{transform:scale(1);}50%{transform:scale(1.16);}}

/* ---- reduced motion: disable everything ------------------------- */
@media (prefers-reduced-motion:reduce){
  .mo{opacity:1!important;transform:none!important;filter:none!important;}
  .mo-hero > *:not(.mo-orbs){animation:none!important;opacity:1!important;transform:none!important;filter:none!important;}
  .mo-orb{animation:none!important;}
  #mo-progress,#mo-top{display:none!important;}
}