/* =====================================================================
   Changhua Bilingual Hub — site-wide motion layer  (motion.css)
   Drop-in companion to motion.js. Adds scroll-reveal, hero life and
   micro-interactions to bespoke pages (festivals, disaster-english,
   1-on-1 topics, soccer program, partner pages …) WITHOUT touching
   their 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. Colors adapt via --mo-accent / --mo-accent2 if a page sets
   them, else fall back to the Hub teal → orange brand.
   ===================================================================== */

:root{
  --mo-accent: #1f6e6e;   /* hub teal  */
  --mo-accent2: #e89a3c;  /* hub orange */
}

/* ---- 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 .72s cubic-bezier(.2,.7,.2,1),
             transform .72s cubic-bezier(.2,.7,.2,1),
             filter .72s ease;
}
.mo-up{transform:translateY(34px);}
.mo-left{transform:translateX(-42px);}
.mo-right{transform:translateX(42px);}
.mo-zoom{transform:scale(.92);}
.mo-blur{filter:blur(10px);transform:translateY(20px);}
.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:.22;
  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(1.2);}
  100%{transform:translate(0,0) scale(1);}
}

/* ---- card hover lift (generic across page families) ------------- */
.mo-lift{transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s,border-color .3s;}
.mo-lift:hover{transform:translateY(-6px);}

/* ---- 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;}
}