/* ============================================================
   FileDrop — Motion & Micro-interactions (v11)
   Spring bounce · hover lift · magnetic · parallax · border shimmer
   "พอดี" tuning — smooth but noticeable
   ============================================================ */

:root {
  /* Spring easings */
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);      /* overshoot bounce */
  --spring-soft: cubic-bezier(0.16, 1, 0.3, 1);      /* smooth ease-out */
  --spring-snappy: cubic-bezier(0.22, 1.2, 0.36, 1); /* gentle overshoot */
}

/* ===== Spring press (bounce on tap) ===== */
.mo-press {
  transition: transform 0.45s var(--spring);
}
.mo-press:active {
  transform: scale(0.94);
  transition: transform 0.1s ease-out;
}

/* Glass cards that squish slightly on press */
.mo-squish {
  transition: transform 0.45s var(--spring), backdrop-filter 0.2s ease;
}
.mo-squish:active {
  transform: scale(0.985);
  transition: transform 0.1s ease-out;
}

/* ===== Hover lift (smooth elevation) ===== */
.mo-lift {
  transition:
    transform 0.4s var(--spring-soft),
    box-shadow 0.4s var(--spring-soft),
    border-color 0.3s ease,
    background 0.3s ease;
  will-change: transform;
}
.mo-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 50px rgba(0,0,0,0.45), inset 0 1px 0 0 rgba(255,255,255,0.14);
}

/* ===== Border shimmer on hover ===== */
.mo-shimmer-border {
  position: relative;
  isolation: isolate;
}
.mo-shimmer-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(
    from var(--shimmer-angle, 0deg),
    transparent 0%,
    rgba(255,255,255,0.5) 10%,
    transparent 25%,
    transparent 100%
  );
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 1;
}
.mo-shimmer-border:hover::before {
  opacity: 1;
  animation: shimmer-rotate 2s linear infinite;
}

@property --shimmer-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@keyframes shimmer-rotate {
  to { --shimmer-angle: 360deg; }
}

/* Fallback for browsers without @property — static glow border */
@supports not (background: conic-gradient(from 0deg, red, blue)) {
  .mo-shimmer-border:hover::before {
    background: linear-gradient(135deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: none;
  }
}

/* ===== Magnetic (JS-driven via --mag-x / --mag-y) ===== */
.mo-magnetic {
  transition: transform 0.3s var(--spring-soft);
  --mag-x: 0px;
  --mag-y: 0px;
}
.mo-magnetic:hover {
  transform: translate(var(--mag-x), var(--mag-y));
  transition: transform 0.1s ease-out;
}

/* ===== Icon shift/spin on parent hover ===== */
.mo-icon-shift {
  transition: transform 0.4s var(--spring);
}
.mo-lift:hover .mo-icon-shift,
.mo-squish:hover .mo-icon-shift {
  transform: translateY(-2px) scale(1.08);
}

/* ===== Parallax blobs (JS-driven via --scroll-y) ===== */
.mo-parallax-1 { transform: translateY(calc(var(--scroll-y, 0) * 0.04px)); }
.mo-parallax-2 { transform: translateY(calc(var(--scroll-y, 0) * -0.03px)); }
.mo-parallax-3 { transform: translateY(calc(var(--scroll-y, 0) * 0.02px)); }

/* ===== Spring-in entrance (more bouncy than fx-reveal) ===== */
.mo-spring-in {
  opacity: 0;
  transform: translateY(16px) scale(0.98);
  animation: mo-spring-in-anim 0.7s var(--spring) forwards;
}
.mo-spring-in[data-mo-delay="1"] { animation-delay: 0.06s; }
.mo-spring-in[data-mo-delay="2"] { animation-delay: 0.12s; }
.mo-spring-in[data-mo-delay="3"] { animation-delay: 0.18s; }
.mo-spring-in[data-mo-delay="4"] { animation-delay: 0.24s; }
.mo-spring-in[data-mo-delay="5"] { animation-delay: 0.30s; }

@keyframes mo-spring-in-anim {
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== Toggle/select press feedback ===== */
.mo-tap {
  transition: transform 0.3s var(--spring-snappy);
}
.mo-tap:active {
  transform: scale(0.92);
  transition: transform 0.08s ease-out;
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  .mo-press, .mo-squish, .mo-lift, .mo-magnetic, .mo-icon-shift,
  .mo-tap, .mo-spring-in {
    transition: none !important;
    animation: none !important;
    transform: none !important;
  }
  .mo-spring-in { opacity: 1 !important; }
  .mo-parallax-1, .mo-parallax-2, .mo-parallax-3 { transform: none !important; }
  .mo-shimmer-border:hover::before { animation: none; opacity: 0; }
}