/* ================================================
   HealthDataLab — Shared Styles
   ================================================ */

html {
  scroll-behavior: smooth;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Nav blur on scroll */
.nav-blur {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* Shared easing */
:root {
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ------------------------------------------------
   Scroll-triggered reveal animations
   ------------------------------------------------ */
.reveal,
.reveal-scale,
.reveal-left,
.reveal-right {
  opacity: 0;
  transition: opacity 0.7s var(--ease-out-expo),
    transform 0.7s var(--ease-out-expo);
}

.reveal {
  transform: translateY(32px);
}

.reveal-scale {
  transform: translateY(24px) scale(0.97);
  transition-duration: 0.6s;
}

.reveal-left {
  transform: translateX(-32px);
}

.reveal-right {
  transform: translateX(32px);
}

.reveal.visible,
.reveal-scale.visible,
.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: none;
}

/* Stagger delays */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ------------------------------------------------
   Hero entrance — plays on load
   ------------------------------------------------ */
.hero-enter {
  opacity: 0;
  transform: translateY(24px);
  animation: heroFadeUp 0.8s var(--ease-out-expo) forwards;
}

.hero-enter-1 { animation-delay: 0.1s; }
.hero-enter-2 { animation-delay: 0.25s; }
.hero-enter-3 { animation-delay: 0.4s; }
.hero-enter-4 { animation-delay: 0.55s; }

@keyframes heroFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ------------------------------------------------
   Counter animation (index.html)
   ------------------------------------------------ */
.counter {
  font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------
   3D report mockup (index.html)
   ------------------------------------------------ */
.report-3d {
  perspective: 1200px;
}

.report-3d-page {
  transform: rotateY(-4deg) rotateX(2deg);
  transform-origin: left center;
  transition: transform 0.6s var(--ease-out-expo);
}

.report-3d-page:hover {
  transform: rotateY(0) rotateX(0);
}

/* ------------------------------------------------
   Reduced motion
   ------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-scale,
  .reveal-left,
  .reveal-right {
    transition: none;
    opacity: 1;
    transform: none;
  }

  .hero-enter {
    animation: none;
    opacity: 1;
    transform: none;
  }
}