/* Animation Styles */

/* Base Transitions */
.fade-in {
  animation: fadeIn var(--transition-normal) forwards;
}

.fade-out {
  animation: fadeOut var(--transition-normal) forwards;
}

.slide-in {
  animation: slideIn var(--transition-normal) forwards;
}

.slide-out {
  animation: slideOut var(--transition-normal) forwards;
}

.pop-in {
  animation: popIn var(--transition-normal) forwards;
}

/* Keyframes */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

@keyframes slideIn {
  from { 
    opacity: 0; 
    transform: translateY(20px);
  }
  to { 
    opacity: 1; 
    transform: translateY(0);
  }
}

@keyframes slideOut {
  from { 
    opacity: 1; 
    transform: translateY(0);
  }
  to { 
    opacity: 0; 
    transform: translateY(20px);
  }
}

@keyframes popIn {
  0% { 
    opacity: 0; 
    transform: scale(0.8);
  }
  70% { 
    opacity: 1; 
    transform: scale(1.05);
  }
  100% { 
    opacity: 1; 
    transform: scale(1);
  }
}

@keyframes numberReveal {
  0% {
    background-color: var(--primary-50);
    color: transparent;
    transform: scale(0.95);
  }
  50% {
    background-color: var(--primary-100);
  }
  100% {
    background-color: var(--neutral-100);
    color: var(--primary-700);
    transform: scale(1);
  }
}

@keyframes winPulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes goldShine {
  0% {
    background-position: -100px;
  }
  40% {
    background-position: 200px;
  }
  100% {
    background-position: 200px;
  }
}

/* Specific Animations */
.lottery-number, .multi-number .number {
  animation: numberReveal 1s ease-out forwards;
}

.win-message.win {
  animation: winPulse 2s infinite;
}

.first-prize {
  position: relative;
  overflow: hidden;
}

.first-prize::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    rgba(255,255,255,0) 0%, 
    rgba(255,255,255,0.8) 50%, 
    rgba(255,255,255,0) 100%);
  background-size: 200px 100%;
  background-repeat: no-repeat;
  background-position: -100px;
  animation: goldShine 3s infinite;
  pointer-events: none;
}

/* Loading Animation */
.loading-spinner {
  position: relative;
}

.loading-spinner::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--neutral-300);
  border-radius: 50%;
  border-top-color: var(--primary-500);
  animation: spin 1s linear infinite;
  margin-right: 10px;
  vertical-align: middle;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Page Transition Animation */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary-700);
  z-index: 1000;
  transform-origin: bottom;
  animation: pageTransition 1s ease-in-out forwards;
}

@keyframes pageTransition {
  0% {
    transform: scaleY(0);
  }
  50% {
    transform: scaleY(1);
  }
  100% {
    transform: scaleY(0);
  }
}

/* Section Reveal Animations */
.section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Navigation Highlight Animation */
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--text-on-primary);
  transition: width 0.3s ease, left 0.3s ease;
}

.main-nav a:hover::after, .main-nav a.active::after {
  width: 100%;
  left: 0;
}

/* Button Hover Animation */
.btn-primary {
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  transition: transform 0.5s ease, opacity 0.5s ease;
}

.btn-primary:hover::after {
  transform: translate(-50%, -50%) scale(2);
  opacity: 1;
}

/* Theme Toggle Animation */
.theme-toggle {
  overflow: hidden;
  position: relative;
}

.theme-toggle-icon {
  display: inline-block;
  transition: transform 0.5s ease;
}

.dark-theme .theme-toggle-icon {
  transform: rotate(360deg);
}