/* ==========================================================================
   Motion & Animations - Kilombo Tenondé
   Pure CSS scroll-triggered animations, hover transitions, micro-interactions
   Respects prefers-reduced-motion throughout.
   Added: Jul 2026 - total: ~6.5KB
   ========================================================================== */

/* ==========================================================================
   BASE: Reduced motion guard - ALL animations opt into this
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-delay: -1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.1s !important;
  }
}

/* ==========================================================================
   ENTRY ANIMATIONS (via .animate-on-scroll class + Intersection Observer)
   ========================================================================== */

/* Base state: hidden */
.animate-on-scroll {
  opacity: 0;
  will-change: opacity, transform;
}

/* Fade-up variant */
.animate-on-scroll.fade-up {
  transform: translateY(30px);
}

/* Fade-in variant (no slide) */
.animate-on-scroll.fade-in {
  transform: translateY(0);
}

/* Visible state */
.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Stagger delays for card grids - each card gets its own delay */
.card-grid .animate-on-scroll:nth-child(1) { transition-delay: 0s; }
.card-grid .animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.card-grid .animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.card-grid .animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.card-grid .animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }
.card-grid .animate-on-scroll:nth-child(6) { transition-delay: 0.5s; }

/* Delay page-load entrance via .theme-loaded */
.theme-loaded .animate-on-scroll.animated {
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Skip-to-content link */
.sr-only-focusable {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.sr-only-focusable:focus {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  z-index: 10000;
  background: var(--color-accent);
  color: white;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   FOCUS INDICATORS (WCAG AA - visible on both light and dark)
   ========================================================================== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
details summary:focus-visible,
[tabindex]:not([tabindex="-1"]):focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Details summary gets special treatment */
details summary:focus-visible {
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   CARD HOVER EFFECTS
   ========================================================================== */
.card {
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Card image zoom on hover */
.card-image-container {
  overflow: hidden;
}

.card-image-container img {
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card:hover .card-image-container img {
  transform: scale(1.05);
}

/* ==========================================================================
   BUTTON MICRO-INTERACTIONS
   ========================================================================== */
.btn {
  transition: background-color var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base),
              transform 0.15s ease,
              box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

/* Press effect */
.btn:active:not(:disabled) {
  transform: scale(0.97);
}

/* Subtle button focus ring via primary color */
.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(45, 90, 61, 0.2);
}

/* ==========================================================================
   NAVIGATION LINK ANIMATIONS
   ========================================================================== */
.nav-links a {
  position: relative;
  text-decoration: none;
  transition: color var(--transition-base);
}

/* Slide underline on hover */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  width: 100%;
}

/* ==========================================================================
   HERO SECTION - subtle gradient animation
   ========================================================================== */
.hero {
  position: relative;
  overflow: hidden;
}

/* Subtle gradient shift (only on light mode) */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(245, 247, 244, 0.15) 0%,
    rgba(232, 240, 232, 0.1) 50%,
    rgba(245, 247, 244, 0.15) 100%
  );
  background-size: 200% 200%;
  animation: gradientShift 15s ease infinite;
  pointer-events: none;
  z-index: 0;
}

@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

[data-theme="dark"] .hero::before {
  background: linear-gradient(135deg,
    rgba(26, 31, 26, 0.2) 0%,
    rgba(45, 53, 45, 0.15) 50%,
    rgba(26, 31, 26, 0.2) 100%
  );
  background-size: 200% 200%;
}

/* ==========================================================================
   SECTION DIVIDER - subtle pulse
   ========================================================================== */
.section-divider {
  transition: opacity 0.3s ease;
}

/* ==========================================================================
   FOOTER - subtle gradient
   ========================================================================== */
.footer {
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light), var(--color-accent));
  background-size: 200% 100%;
  animation: shimmer 4s ease-in-out infinite;
}

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

[data-theme="dark"] .footer::before {
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-dark), var(--color-accent));
  background-size: 200% 100%;
}

/* ==========================================================================
   FORM FOCUS RING - elegant glow
   ========================================================================== */
.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(45, 90, 61, 0.15);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

/* ==========================================================================
   PHOTO GRID - subtle scale on hover
   ========================================================================== */
.photo-item {
  overflow: hidden;
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

.photo-item:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.photo-item img {
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.photo-item:hover img {
  transform: scale(1.08);
}

/* ==========================================================================
   INSTAGRAM GRID ITEMS
   ========================================================================== */
.instagram-item {
  overflow: hidden;
  transition: transform var(--transition-base);
}

.instagram-item:hover {
  transform: scale(1.03);
}

.instagram-item img {
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.instagram-item:hover img {
  transform: scale(1.08);
}

/* ==========================================================================
   BACK TO TOP BUTTON (if added)
   ========================================================================== */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--transition-base),
              visibility var(--transition-base),
              transform var(--transition-base),
              background-color var(--transition-base);
  z-index: 999;
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
}

/* ==========================================================================
   EVENT CARDS - hover lift
   ========================================================================== */
.event-card {
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

.event-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   TOPIC CARDS - hover lift
   ========================================================================== */
.topic-card {
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

.topic-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* ==========================================================================
   STAT COUNTERS - subtle accent border
   ========================================================================== */
/* Stats section already has nice numbers, add subtle animation */

/* ==========================================================================
   WCAG AA COLOR CONTRAST ENHANCEMENTS
   ========================================================================== */
/* Ensure text-secondary is readable on surfaces */
.text-secondary {
  color: #3D5A3D; /* Darker than original #4A5D4A for better contrast */
}

[data-theme="dark"] .text-secondary {
  color: #C5D0C5; /* Lighter than original #B8C4B8 for better contrast */
}

/* Ensure text-white-muted is readable on accent backgrounds */
.text-white-muted {
  color: rgba(255, 255, 255, 0.88); /* Was 0.8 - now meets 4.5:1 on dark green */
}

/* ==========================================================================
   RESPONSIVE TOUCHUPS
   ========================================================================== */
@media (max-width: 768px) {
  .animate-on-scroll {
    opacity: 1; /* No animation on mobile for performance */
    transform: none;
  }
}

@media print {
  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
  .hero::before,
  .footer::before {
    display: none;
  }
}

/* ==========================================================================
   TEXTURED BACKGROUND (generated pattern)
   ========================================================================== */
.section-textured {
  background-image: url('../images/bg-texture.jpg');
  background-repeat: repeat;
  background-size: 200px 200px;
}

@media (min-width: 768px) {
  .section-textured {
    background-size: 250px 250px;
  }
}

/* Dark mode: use a darker overlay on the texture */
[data-theme="dark"] .section-textured {
  background-blend-mode: overlay;
  background-color: rgba(24, 36, 29, 0.92);
}