/* =====================================================================
   Beidou Junior High — shared motion layer  (motion.css)
   Loaded on every page. Adds scroll-reveal, hero life, micro-interactions.
   All initial-hidden states are applied by motion.js ONLY, so if JS is
   absent the page renders fully visible. Honors prefers-reduced-motion.
   Palette: navy / gold / teal (matches Beidou JHS :root).
   ===================================================================== */

/* ---- scroll progress bar ---------------------------------------- */
#mo-progress{
  position:fixed;top:0;left:0;height:3px;width:0;z-index:300;
  background:linear-gradient(90deg,var(--navy-deep,#1a3a5c),var(--gold,#c8870a) 60%,var(--gold-soft,#fef0d4));
  box-shadow:0 0 12px rgba(200,135,10,.55);
  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(38px);}
.mo-left{transform:translateX(-46px);}
.mo-right{transform:translateX(46px);}
.mo-zoom{transform:scale(.9);}
.mo-blur{filter:blur(11px);transform:translateY(22px);}
.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(28px);filter:blur(7px);
  animation:moHeroIn .95s cubic-bezier(.2,.7,.2,1) both;
}
@keyframes moHeroIn{to{opacity:1;transform:none;filter:none;}}

/* ---- hero: drifting ambient orbs (pure decoration) -------------- */
.mo-orbs{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:0;}
.mo-orb{
  position:absolute;border-radius:50%;filter:blur(30px);opacity:.5;
  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);}
}

/* ---- top nav: animated underline -------------------------------- */
.subnav a,.topbar-nav a{position:relative;}
.subnav a::after,.topbar-nav a::after{
  content:"";position:absolute;left:12px;right:100%;bottom:1px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--navy-deep,#1a3a5c),var(--gold,#c8870a));
  transition:right .3s cubic-bezier(.2,.7,.2,1);
}
.subnav a:hover::after,.topbar-nav a:hover::after{right:12px;}
.subnav a.is-active::after,.topbar-nav a.is-active::after{right:100%;}

/* ---- card hover lift (generic across page families) ------------- */
.pillar,.life-card,.card,.fcard,.hub-card,.lcard,.unit,.vc,.course,.feature,.info-card{
  transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s,border-color .3s;
}
.pillar:hover,.life-card:hover,.card:hover,.fcard:hover,.hub-card:hover,.lcard:hover,
.unit:hover,.vc:hover,.course:hover,.feature:hover,.info-card:hover{
  transform:translateY(-6px);
}

/* ---- back-to-top floating button -------------------------------- */
#mo-top{
  position:fixed;right:22px;bottom:22px;z-index:200;
  width:48px;height:48px;border:0;cursor:pointer;border-radius:50%;
  background:var(--navy-deep,#1a3a5c);color:#fff;
  font-size:23px;line-height:46px;text-align:center;font-family:inherit;
  box-shadow:0 10px 26px -8px rgba(0,0,0,.55);
  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(--gold-deep,#9b6508);transform:translateY(-3px) scale(1.05);}

/* ---- speak / pronunciation buttons: pulse while playing --------- */
.speak.mo-playing,.say.mo-playing,.ln__speak.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;}
}