/* Motion layer — scroll reveal, micro-interactions, education site */

:root {
  --motion-ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --motion-duration-sm: 0.35s;
  --motion-duration-md: 0.55s;
  --motion-duration-lg: 0.75s;
  --motion-stagger: 0.07s;
}

/* Ambient background */
body.site-motion {
  background:
    radial-gradient(ellipse 80% 50% at 0% 0%, rgb(45 143 90 / 0.06), transparent 50%),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgb(232 146 181 / 0.05), transparent 45%),
    var(--green-50);
}

.site-motion .site-header {
  transition:
    background 0.35s var(--motion-ease-out),
    box-shadow 0.35s var(--motion-ease-out),
    border-color 0.35s var(--motion-ease-out);
}

.site-motion .site-header.is-scrolled {
  background: rgb(255 255 255 / 0.96);
  box-shadow: 0 8px 32px rgb(15 45 30 / 0.08);
  border-bottom-color: transparent;
}

.site-motion .logo-img {
  transition: transform 0.4s var(--motion-ease-out);
}

.site-motion .site-header.is-scrolled .logo-img {
  transform: scale(0.92);
}

.site-motion .site-nav a,
.site-motion .nav-group-toggle {
  transition:
    background 0.25s var(--motion-ease-out),
    color 0.25s var(--motion-ease-out),
    transform 0.25s var(--motion-ease-out);
}

.site-motion .site-nav a:hover,
.site-motion .nav-group-toggle:hover {
  transform: translateY(-1px);
}

/* Buttons & cards — lift on hover */
.site-motion .btn {
  transition:
    transform 0.25s var(--motion-ease-out),
    box-shadow 0.25s var(--motion-ease-out),
    background 0.2s,
    color 0.2s,
    border-color 0.2s;
}

.site-motion .btn:hover {
  transform: translateY(-2px);
}

.site-motion .content-card,
.site-motion .activity-card,
.site-motion .feature-card,
.site-motion .campus-pillar-card,
.site-motion .gallery-album,
.site-motion .doc-item,
.site-motion .search-result-item {
  transition:
    transform 0.35s var(--motion-ease-out),
    box-shadow 0.35s var(--motion-ease-out),
    border-color 0.25s;
}

.site-motion .content-card:hover,
.site-motion .activity-card:hover,
.site-motion .feature-card:hover,
.site-motion .campus-pillar-card:hover,
.site-motion .gallery-album:hover {
  transform: translateY(-4px);
}

.site-motion .content-card img,
.site-motion .activity-card img,
.site-motion .gallery-album img {
  transition: transform 0.5s var(--motion-ease-out);
}

.site-motion .content-card:hover img,
.site-motion .activity-card:hover img,
.site-motion .gallery-album:hover img {
  transform: scale(1.03);
}

/* Section intro accent line */
.site-motion .section-label {
  position: relative;
  overflow: hidden;
}

.site-motion .section-label::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--green-500), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s var(--motion-ease-out);
}

.site-motion .section-label.motion-in::after {
  transform: scaleX(1);
}

/* Scroll reveal base */
@media (prefers-reduced-motion: no-preference) {
  .motion-ready [data-motion] {
    opacity: 0;
    transform: translateY(28px);
    transition:
      opacity var(--motion-duration-md) var(--motion-ease-out),
      transform var(--motion-duration-md) var(--motion-ease-out);
    will-change: opacity, transform;
  }

  .motion-ready [data-motion="fade"] {
    transform: none;
  }

  .motion-ready [data-motion="fade-left"] {
    transform: translateX(-24px);
  }

  .motion-ready [data-motion="fade-right"] {
    transform: translateX(24px);
  }

  .motion-ready [data-motion="scale"] {
    transform: scale(0.96);
  }

  .motion-ready [data-motion="hero"] {
    opacity: 0;
    transform: translateY(16px) scale(0.99);
    transition-duration: var(--motion-duration-lg);
  }

  .motion-ready [data-motion].motion-in {
    opacity: 1;
    transform: none;
  }

  .motion-ready [data-motion-delay="1"] { transition-delay: calc(var(--motion-stagger) * 1); }
  .motion-ready [data-motion-delay="2"] { transition-delay: calc(var(--motion-stagger) * 2); }
  .motion-ready [data-motion-delay="3"] { transition-delay: calc(var(--motion-stagger) * 3); }
  .motion-ready [data-motion-delay="4"] { transition-delay: calc(var(--motion-stagger) * 4); }
  .motion-ready [data-motion-delay="5"] { transition-delay: calc(var(--motion-stagger) * 5); }
  .motion-ready [data-motion-delay="6"] { transition-delay: calc(var(--motion-stagger) * 6); }

  /* Hero parallax wrapper */
  .motion-hero-parallax {
    transition: transform 0.1s linear;
    will-change: transform;
  }

  /* Page enter */
  .motion-ready.site-motion main,
  .motion-ready.site-motion .page-main,
  .motion-ready.site-motion .post-page,
  .motion-ready.site-motion .archive-page {
    animation: motionPageIn 0.5s var(--motion-ease-out) both;
  }

  @keyframes motionPageIn {
    from {
      opacity: 0;
      transform: translateY(8px);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }

  /* Subtle pulse on pinned badge */
  .site-motion .pinned-badge {
    animation: motionPulse 2.8s ease-in-out infinite;
  }

  @keyframes motionPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.82; }
  }

  /* Footer link hover slide */
  .site-motion .footer-links a {
    transition: color 0.2s, padding-left 0.25s var(--motion-ease-out);
  }

  .site-motion .footer-links a:hover {
    padding-left: 0.35rem;
  }

  /* Mobile quick bar enter */
  .site-motion .mobile-quick-actions {
    animation: motionSlideUp 0.45s var(--motion-ease-out) 0.2s both;
  }

  @keyframes motionSlideUp {
    from {
      opacity: 0;
      transform: translateY(100%);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  .motion-ready [data-motion] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .site-motion .pinned-badge {
    animation: none;
  }

  .site-motion main,
  .site-motion .page-main {
    animation: none !important;
  }
}