/* ========================================
   Animations CSS
   ======================================== */

/* ========================================
   Transition Definitions
   ======================================== */

/* Smooth CSS Transitions (200ms-500ms) */
:root {
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-bounce: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --transition-ease-in: 250ms ease-in;
  --transition-ease-out: 250ms ease-out;
  --transition-ease-in-out: 300ms ease-in-out;
}

/* ========================================
   Interactive Elements Transitions
   ======================================== */

/* Buttons */
.btn {
  transition: background-color var(--transition-normal),
              transform var(--transition-fast),
              box-shadow var(--transition-normal);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: scale(0.98);
  transition: transform var(--transition-fast);
}

.btn--outline {
  transition: background-color var(--transition-normal),
              color var(--transition-normal),
              border-color var(--transition-normal);
}

/* Links */
a {
  transition: color var(--transition-normal),
              text-decoration-color var(--transition-normal);
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Cards */
.grid-item {
  transition: transform var(--transition-normal),
              box-shadow var(--transition-normal),
              border-color var(--transition-normal);
}

/* Form Elements */
.form__input,
.form__select,
.form__textarea {
  transition: border-color var(--transition-normal),
              box-shadow var(--transition-normal),
              background-color var(--transition-normal);
}

/* Navigation */
.nav__item {
  transition: color var(--transition-normal),
              background-color var(--transition-normal);
}

/* ========================================
   Hover Effects
   ======================================== */

/* Button Hover Effects */
.btn:hover {
  background-color: var(--accent-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--secondary:hover {
  background-color: var(--accent-secondary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--outline:hover {
  background-color: var(--accent-primary);
  color: var(--text-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Link Hover Effects */
a:hover {
  color: var(--accent-primary-hover);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Card Hover Effects */
.grid-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

/* Thumbnail Hover Effects */
.grid-item__thumbnail img {
  transition: transform var(--transition-slow);
}

.grid-item:hover .grid-item__thumbnail img {
  transform: scale(1.05);
}

/* Navigation Item Hover Effects */
.nav__item:hover {
  color: var(--text-primary);
  background-color: rgba(0, 212, 255, 0.1);
  border-radius: var(--border-radius-md);
}

.nav__item--active:hover {
  background-color: rgba(0, 212, 255, 0.2);
}

/* Form Input Hover Effects */
.form__input:hover,
.form__select:hover,
.form__textarea:hover {
  border-color: var(--color-border);
}

/* ========================================
   Keyframe Animations
   ======================================== */

/* Pulse Animation */
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.7;
    transform: scale(0.98);
  }
}

/* Fade In Animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade In Up Animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade In Down Animation */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade In Left Animation */
@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Fade In Right Animation */
@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Slide In Animation */
@keyframes slideIn {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

/* Slide Out Animation */
@keyframes slideOut {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(100%);
  }
}

/* Scale Animation */
@keyframes scale {
  from {
    transform: scale(0.9);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* Rotate Animation */
@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Shake Animation */
@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  10%,
  30%,
  50%,
  70%,
  90% {
    transform: translateX(-4px);
  }
  20%,
  40%,
  60%,
  80% {
    transform: translateX(4px);
  }
}

/* Bounce Animation */
@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-20px);
  }
  60% {
    transform: translateY(-10px);
  }
}

/* Spin Animation */
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ========================================
   Animation Utility Classes
   ======================================== */

/* Animation Durations */
.animate-fast {
  animation-duration: var(--transition-fast);
}

.animate-normal {
  animation-duration: var(--transition-normal);
}

.animate-slow {
  animation-duration: var(--transition-slow);
}

/* Animation Delays */
.animate-delay-100 {
  animation-delay: 100ms;
}

.animate-delay-200 {
  animation-delay: 200ms;
}

.animate-delay-300 {
  animation-delay: 300ms;
}

.animate-delay-400 {
  animation-delay: 400ms;
}

.animate-delay-500 {
  animation-delay: 500ms;
}

/* Animation Iterations */
.animate-infinite {
  animation-iteration-count: infinite;
}

.animate-once {
  animation-iteration-count: 1;
}

/* Animation Fill Modes */
.animate-forwards {
  animation-fill-mode: forwards;
}

.animate-backwards {
  animation-fill-mode: backwards;
}

.animate-both {
  animation-fill-mode: both;
}

/* Animation Easing */
.animate-linear {
  animation-timing-function: linear;
}

.animate-ease {
  animation-timing-function: ease;
}

.animate-ease-in {
  animation-timing-function: ease-in;
}

.animate-ease-out {
  animation-timing-function: ease-out;
}

.animate-ease-in-out {
  animation-timing-function: ease-in-out;
}

.animate-bounce {
  animation-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Animation Classes */
.fade-in {
  animation: fadeIn var(--transition-normal) ease forwards;
}

.fade-in-up {
  animation: fadeInUp var(--transition-normal) ease forwards;
}

.fade-in-down {
  animation: fadeInDown var(--transition-normal) ease forwards;
}

.fade-in-left {
  animation: fadeInLeft var(--transition-normal) ease forwards;
}

.fade-in-right {
  animation: fadeInRight var(--transition-normal) ease forwards;