/**
 * droPrompt UI Animations — lightweight enhancement layer
 * Add to any page: <link rel="stylesheet" href="/assets/animations.css">
 *                   <script defer src="/assets/animations.js"></script>
 * Zero breaking changes — only adds visual polish.
 */

/* ── Floating background particles ── */
.dp-particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.dp-particle {
  position: absolute;
  border-radius: 50%;
  animation: dp-float-up linear infinite;
  opacity: 0;
}
@keyframes dp-float-up {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

/* ── Card hover lift ── */
.dp-card-lift {
  transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.dp-card-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(10, 132, 255, 0.12);
}

/* ── Score ring animation ── */
.dp-score-ring {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 80px;
  height: 80px;
}
.dp-score-ring svg {
  transform: rotate(-90deg);
}
.dp-score-ring circle {
  fill: none;
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.dp-score-ring .bg { stroke: #333; }
.dp-score-ring .fg { stroke: var(--dp-blue, #0a84ff); }
.dp-score-value {
  position: absolute;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--fg, #f5f5f7);
}

/* ── Button ripple ── */
.dp-ripple {
  position: relative;
  overflow: hidden;
}
.dp-ripple::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 10%, transparent 10%);
  transform: scale(10);
  opacity: 0;
  transition: transform 0.5s, opacity 0.5s;
}
.dp-ripple:active::after {
  transform: scale(0);
  opacity: 1;
  transition: 0s;
}

/* ── Fade-in page sections ── */
.dp-fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.dp-fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Model icon glow on hover ── */
.dp-icon-glow {
  transition: box-shadow 0.3s, transform 0.3s;
}
.dp-icon-glow:hover {
  box-shadow: 0 0 20px rgba(10, 132, 255, 0.4);
  transform: scale(1.05);
}

/* ── Subtle gradient mesh background ── */
body.dp-animated-bg::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(10, 132, 255, 0.04) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(94, 92, 230, 0.03) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 80%, rgba(10, 132, 255, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
  animation: dp-mesh-shift 20s ease-in-out infinite;
}
@keyframes dp-mesh-shift {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ── Pulse animation for CTA buttons ── */
@keyframes dp-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(10, 132, 255, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(10, 132, 255, 0); }
}
.dp-pulse {
  animation: dp-pulse 2s infinite;
}

/* ── Skeleton loading shimmer ── */
@keyframes dp-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.dp-skeleton {
  background: linear-gradient(90deg, var(--surface, #1d1d1f) 25%, rgba(255,255,255,0.05) 50%, var(--surface, #1d1d1f) 75%);
  background-size: 200% 100%;
  animation: dp-shimmer 1.5s infinite;
  border-radius: 8px;
}

/* ── Respect "reduce motion": stop every looping/decorative animation ── */
@media (prefers-reduced-motion: reduce) {
  .dp-particles { display: none !important; }
  .dp-particle,
  body.dp-animated-bg::before,
  .dp-pulse,
  .dp-skeleton { animation: none !important; }
  .dp-card-lift,
  .dp-fade-in,
  .dp-icon-glow { transition: none !important; }
  .dp-fade-in { opacity: 1 !important; transform: none !important; }
}