/* =============================================
   Apple-inspired Animations — shared
   ============================================= */

/* ── Scroll entrance ── */
.sa {
  opacity: 0;
  will-change: opacity, transform;
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.9s cubic-bezier(0.16, 1, 0.3, 1),
              filter 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.sa-up    { transform: translateY(50px); }
.sa-left  { transform: translateX(-60px); }
.sa-right { transform: translateX(60px); }
.sa-scale { transform: scale(0.94); filter: blur(4px); }
.sa.in    { opacity: 1; transform: none; filter: none; }

/* Category grid: preserve GPU acceleration hint */
.sa-grid > .sa-up    { transform: translateY(50px) translateZ(0) !important; }
.sa-grid > .sa-up.in { transform: translateZ(0) !important; }

/* Stagger delays */
.d1 { transition-delay: 0.10s; }
.d2 { transition-delay: 0.20s; }
.d3 { transition-delay: 0.30s; }
.d4 { transition-delay: 0.40s; }
.d5 { transition-delay: 0.50s; }
.d6 { transition-delay: 0.60s; }

/* ── Hero text blur-up entrance (index only) ── */
@keyframes heroIn {
  from { opacity: 0; transform: translateY(30px); filter: blur(8px); }
  to   { opacity: 1; transform: translateY(0);    filter: blur(0);   }
}
.hero-content > h1,
.hero-content > p,
.hero-content > a { opacity: 0; }
.hero-content.hero-active > h1                { animation: heroIn 1s cubic-bezier(0.16, 1, 0.3, 1) 0.10s forwards; }
.hero-content.hero-active > p:nth-of-type(1)  { animation: heroIn 1s cubic-bezier(0.16, 1, 0.3, 1) 0.25s forwards; }
.hero-content.hero-active > p:nth-of-type(2)  { animation: heroIn 1s cubic-bezier(0.16, 1, 0.3, 1) 0.38s forwards; }
.hero-content.hero-active > a                 { animation: heroIn 1s cubic-bezier(0.16, 1, 0.3, 1) 0.52s forwards; }

/* ── Category card hover (index only) ── */
.cat-info {
  transform: translateY(8px);
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.group:hover .cat-info { transform: translateY(0); }

.cat-link {
  opacity: 0; transform: translateX(-4px); display: inline-block;
  transition: opacity 0.35s ease 0.05s, transform 0.35s cubic-bezier(0.16, 1, 0.3, 1) 0.05s;
}
.group:hover .cat-link { opacity: 1; transform: translateX(0); }

.cat-link-arrow {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.group:hover .cat-link-arrow { transform: translateX(3px); }

/* ── Feature images ── */
.feat-img {
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
              filter 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.feat-img:hover {
  transform: scale(1.025);
  box-shadow: 0 32px 64px -16px rgba(0, 0, 0, 0.2);
}

/* ── Feature list items ── */
.feat-item {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
              filter 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 10px;
  padding: 6px 8px;
  margin: -6px -8px;
}
.feat-item:hover { transform: translateX(6px); }

/* ── Buttons press effect ── */
.btn-press {
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.2s ease,
              opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
              filter 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.btn-press:hover  { transform: scale(1.04); }
.btn-press:active { transform: scale(0.97); }

/* ── Card hover lift ── */
.card-lift {
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.card-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.15);
}

/* ── Nav underline slide ── */
.nav-link { position: relative; }
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 1.5px; background: currentColor;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-link:hover::after { width: 100%; }