/* REVEAL ANIMATIONS */
.fade-up{opacity:0;transform:translateY(32px);transition:opacity .75s var(--ease),transform .75s var(--ease)}
.fade-up.on{opacity:1;transform:translateY(0)}
.fade-left{opacity:0;transform:translateX(30px);transition:opacity .75s var(--ease),transform .75s var(--ease)}
.fade-left.on{opacity:1;transform:translateX(0)}
.stagger>*{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.stagger.on>*{opacity:1;transform:translateY(0)}

/* HIGHLIGHT LINE */
.gold-line{display:inline-block;position:relative}
.gold-line::after{
  content:'';position:absolute;bottom:-2px;left:0;right:0;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .6s .3s var(--ease);
}
.gold-line.on::after{transform:scaleX(1)}


/* === ADVANCED SCROLL EFFECTS === */
.parallax-slow{will-change:transform}
.parallax-fast{will-change:transform}

/* Slide từ trái/phải */
.slide-left{opacity:0;transform:translateX(-50px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.slide-right{opacity:0;transform:translateX(50px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.slide-left.on,.slide-right.on{opacity:1;transform:translateX(0)}

/* Scale in */
.scale-in{opacity:0;transform:scale(.88);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.scale-in.on{opacity:1;transform:scale(1)}

/* Clip wipe — chữ heading lướt vào */
.clip-wipe{overflow:hidden;display:block}
.clip-wipe span{display:block;transform:translateY(110%);transition:transform .85s var(--ease)}
.clip-wipe.on span{transform:translateY(0)}

/* Gold underline grow */
.u-grow{background-image:linear-gradient(var(--gold),var(--gold));background-repeat:no-repeat;background-position:left bottom;background-size:0 1px;transition:background-size .8s .3s var(--ease);padding-bottom:2px}
.u-grow.on{background-size:100% 1px}

/* Số stat pulse */
.stat-num{transition:transform .3s var(--ease)}
.stat-item:hover .stat-num{transform:scale(1.12);color:var(--gold-2)}

/* Service card — tilt 3D */
.svc-card{transform-style:preserve-3d;transition:transform .3s var(--ease),background .3s}
.svc-card:hover{transform:translateY(-6px) rotateX(2deg)}

/* Skill chip shimmer */
.skill-chip{background-size:200% auto}
@keyframes shimmer{to{background-position:-200% center}}
/* shimmer removed */

/* Why item — left border grow */
.why-item{border-left:2px solid transparent;padding-left:.8rem;transition:border-color .4s,padding-left .3s var(--ease),padding-top .3s}
.why-item:hover{border-left-color:var(--gold)}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  /* Hiện ngay nội dung reveal — không chờ observer */
  .fade-up,.fade-left,.slide-left,.slide-right,
  .scale-in,.stagger>*,.clip-wipe span{
    opacity:1;transform:none;
  }
  .u-grow{background-size:100% 1px}
  .gold-line::after{transform:scaleX(1)}
}