/* animations.css - weMOVEtogether Design System
 * Animation tokens and micro-interactions
 * Part of DESIGN-OVERHAUL-001 Phase 1
 */

/* ========================================
   ANIMATION TOKENS
   ======================================== */

:root {
  /* Duration tokens */
  --duration-instant: 0.1s;
  --duration-fast: 0.15s;
  --duration-normal: 0.2s;
  --duration-slow: 0.3s;
  --duration-slower: 0.5s;
  
  /* Easing tokens */
  --ease-standard: ease;
  --ease-out: ease-out;
  --ease-in-out: ease-in-out;
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ========================================
   ACCESSIBILITY - REDUCED MOTION
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========================================
   BUTTON ANIMATIONS
   ======================================== */

button, .btn {
  transition: background-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}

/* ========================================
   CARD ANIMATIONS
   ======================================== */

.card {
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* ========================================
   PAGE LOAD ANIMATION
   ======================================== */

.page-enter {
  animation: fadeInUp var(--duration-slow) var(--ease-out);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   FORM ELEMENT ANIMATIONS
   ======================================== */

/* Checkbox tick animation */
input[type="checkbox"]:checked::before {
  animation: checkBounce var(--duration-normal) var(--ease-bounce);
}

@keyframes checkBounce {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

/* ========================================
   PROGRESS BAR ANIMATION
   ======================================== */

.progress-bar-fill {
  transition: width var(--duration-slower) var(--ease-out);
}

/* ========================================
   MODAL ANIMATIONS
   ======================================== */

.modal {
  animation: modalFadeIn var(--duration-normal) var(--ease-out);
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ========================================
   TOAST NOTIFICATION ANIMATIONS
   ======================================== */

.toast {
  animation: slideInFromRight var(--duration-slow) var(--ease-out);
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ========================================
   SKELETON LOADING ANIMATION
   ======================================== */

.skeleton {
  background: linear-gradient(
    90deg,
    #E2E8F0 0%,
    #F8FAFC 50%,
    #E2E8F0 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s linear infinite;
}

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

/* ========================================
   FOCUS INDICATOR ANIMATION
   ======================================== */

:focus-visible {
  outline: 2px solid var(--color-secondary-teal);
  outline-offset: 2px;
  transition: outline-offset var(--duration-fast) var(--ease-standard);
}