/* ============================================================
   THE SKIN TREE — ANIMATIONS & MICRO-INTERACTIONS
   ============================================================ */

/* ── KEYFRAMES ──────────────────────────────────────────── */

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px var(--c-terracotta-glow); }
  50%       { box-shadow: 0 0 50px rgba(178, 89, 54, 0.40); }
}

@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes draw-line {
  from { stroke-dashoffset: 1000; }
  to   { stroke-dashoffset: 0; }
}

@keyframes count-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slide-in-up {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

@keyframes hero-reveal {
  0%   { opacity: 0; clip-path: inset(0 100% 0 0); }
  100% { opacity: 1; clip-path: inset(0 0% 0 0); }
}

@keyframes particle-float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); opacity: 0.4; }
  33%       { transform: translate(10px, -15px) rotate(120deg); opacity: 0.8; }
  66%       { transform: translate(-8px, -8px) rotate(240deg); opacity: 0.6; }
}

/* ── ANIMATION UTILITY CLASSES ──────────────────────────── */
.anim-fade-in     { animation: fadeIn var(--dur-slow) var(--ease-out) both; }
.anim-fade-in-up  { animation: fadeInUp var(--dur-slower) var(--ease-out) both; }
.anim-fade-in-left  { animation: fadeInLeft var(--dur-slower) var(--ease-out) both; }
.anim-fade-in-right { animation: fadeInRight var(--dur-slower) var(--ease-out) both; }
.anim-scale-in    { animation: scaleIn var(--dur-slower) var(--ease-spring) both; }
.anim-float       { animation: float 4s ease-in-out infinite; }

/* ── STAGGER DELAYS ─────────────────────────────────────── */
[data-delay="100"] { animation-delay: 100ms; }
[data-delay="200"] { animation-delay: 200ms; }
[data-delay="300"] { animation-delay: 300ms; }
[data-delay="400"] { animation-delay: 400ms; }
[data-delay="500"] { animation-delay: 500ms; }
[data-delay="600"] { animation-delay: 600ms; }
[data-delay="700"] { animation-delay: 700ms; }
[data-delay="800"] { animation-delay: 800ms; }

/* ── PAGE TRANSITION ────────────────────────────────────── */
.page-enter {
  animation: fadeIn 0.6s var(--ease-out) both;
}

/* ── HOVER LIFT ─────────────────────────────────────────── */
.hover-lift {
  transition: transform var(--dur-normal) var(--ease-spring),
              box-shadow var(--dur-normal) var(--ease-silk);
}
.hover-lift:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

/* ── SHIMMER EFFECT (loading / accent) ──────────────────── */
.shimmer {
  background: linear-gradient(
    90deg,
    var(--c-cream) 0%,
    var(--c-sand-light) 50%,
    var(--c-cream) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
}

/* ── CURSOR GLOW (desktop) ──────────────────────────────── */
.glow-cursor-target {
  position: relative;
  overflow: hidden;
}
.glow-cursor-target::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--c-terracotta-glow) 0%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  opacity: 0;
  z-index: 0;
  border-radius: 50%;
}
.glow-cursor-target:hover::before { opacity: 1; }

/* ── UNDERLINE GROW ─────────────────────────────────────── */
.underline-grow {
  position: relative;
  display: inline-block;
}
.underline-grow::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--c-terracotta);
  transition: width var(--dur-normal) var(--ease-out);
}
.underline-grow:hover::after { width: 100%; }

/* ── SMOOTH MODAL ───────────────────────────────────────── */
.modal-backdrop {
  animation: fadeIn var(--dur-normal) var(--ease-silk);
}
.modal-content {
  animation: scaleIn var(--dur-normal) var(--ease-spring);
}

/* ── REDUCE MOTION ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}