@keyframes fade-up   { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:translateY(0); } }
@keyframes fade-in   { from { opacity:0; } to { opacity:1; } }
@keyframes scale-in  { from { opacity:0; transform:scale(.85); } to { opacity:1; transform:scale(1); } }
@keyframes shimmer   { 0% { background-position:-200% center; } 100% { background-position:200% center; } }
@keyframes gradient-shift { 0%,100% { background-position:0% 50%; } 50% { background-position:100% 50%; } }
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 var(--accent-glow); }
  70%  { box-shadow: 0 0 0 14px rgba(255,121,0,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,121,0,0); }
}

.anim-fade-up  { animation: fade-up  var(--dur-slow) var(--ease-out) both; }
.anim-fade-in  { animation: fade-in  var(--dur-slow) var(--ease-out) both; }
.anim-scale-in { animation: scale-in var(--dur-slow) var(--ease-out) both; }

.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }
.delay-3 { animation-delay: 300ms; }
.delay-4 { animation-delay: 400ms; }
.delay-5 { animation-delay: 500ms; }
.delay-6 { animation-delay: 600ms; }

.cursor {
  position: fixed;
  top: 0; left: 0;
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-cursor);
  transform: translate(-50%,-50%);
  transition: width .2s, height .2s, opacity .2s;
  will-change: transform;
  opacity: 0;
}
.cursor-follower {
  position: fixed;
  top: 0; left: 0;
  width: 34px; height: 34px;
  border: 1.5px solid rgba(255,121,0,.45);
  border-radius: 50%;
  pointer-events: none;
  z-index: calc(var(--z-cursor) - 1);
  transform: translate(-50%,-50%);
  will-change: transform;
  transition: width .3s, height .3s, border-color .3s, opacity .3s;
  opacity: 0;
}
.cursor.hover         { width: 20px; height: 20px; background: var(--accent-soft); }
.cursor-follower.hover{ width: 54px; height: 54px; border-color: var(--accent); }
.cursor.click         { width: 7px;  height: 7px;  background: var(--yellow); }

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--yellow));
  z-index: calc(var(--z-header) + 2);
  width: 0%;
  transition: width .1s linear;
  pointer-events: none;
}

.back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  z-index: var(--z-overlay);
  width: 44px; height: 44px;
  border-radius: var(--r-full);
  background: var(--glass-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border-accent);
  color: var(--accent);
  font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--glass-shadow-accent);
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-normal), transform var(--dur-normal) var(--ease-out);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover   { transform: translateY(-3px); }

.skeleton {
  background: linear-gradient(90deg, var(--bg-2) 25%, var(--bg-3) 50%, var(--bg-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--r-md);
}

.glow-border { position: relative; }
.glow-border::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent), var(--yellow), var(--accent));
  background-size: 200% 200%;
  animation: gradient-shift 4s ease infinite;
  z-index: -1;
  opacity: 0;
  transition: opacity var(--dur-normal);
}
.glow-border:hover::before { opacity: 1; }

.pulse-ring { animation: pulse-ring 2.5s ease-in-out infinite; }