/* Animations */

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

.spinner {
  animation: spin 1s linear infinite;
}

/* Fade In Animation */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.5s ease-in;
}

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

.slide-up {
  animation: slideUp 0.5s ease-out;
}

/* Pulse Animation */
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.pulse {
  animation: pulse 2s infinite;
}

/* Scale Animation */
@keyframes scale {
  from { transform: scale(0.95); }
  to { transform: scale(1); }
}

.scale {
  animation: scale 0.3s ease-out;
}

/* Button Hover Effects */
.analyze-btn:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(37, 99, 235, 0.25);
}

.analyze-btn:not(:disabled):active {
  transform: translateY(0);
}

/* Card Hover Effects */
.feature-card:hover .feature-icon {
  transform: scale(1.1);
  background-color: rgba(37, 99, 235, 0.15);
}

/* File Upload Animation */
.upload-area.dragover {
  transform: scale(1.02);
}

/* Tab Button Animation */
.tab-btn {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
}

.tab-btn:hover:not(.active) {
  transform: translateY(-2px);
}

.tab-btn.active {
  transform: translateY(-3px);
}

/* Results Container Animation */
.results-container {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.results-container:hover {
  box-shadow: var(--shadow-lg);
}

/* Section Transitions */
.section-title, 
.feature-card,
.about-content p {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

/* These will be activated by JavaScript when elements come into view */
.appear {
  opacity: 1;
  transform: translateY(0);
}

/* Hero Section Animation */
.hero {
  background-size: 200% 200%;
  animation: gradientAnimation 15s ease infinite;
}

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

/* Logo Animation */
.logo i {
  transition: transform 0.3s ease;
}

.logo:hover i {
  transform: rotate(15deg);
}

/* Action Buttons Animation */
.action-btn {
  transition: all 0.2s ease;
}

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

.action-btn:active {
  transform: translateY(0);
}

/* File Selected Animation */
.file-selected {
  border-color: var(--success-color) !important;
  background-color: rgba(16, 185, 129, 0.05) !important;
}

.file-selected i {
  color: var(--success-color);
}