/**
 * Loading Component Styles
 * Styles for loading screens, spinners, and loading states
 */

/* ==========================================================================
   Loading Screen
   ========================================================================== */

.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 1;
  visibility: visible;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen[aria-hidden="true"] {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.loading-logo {
  margin-bottom: var(--space-lg);
  animation: pulse 2s ease-in-out infinite;
}

.loading-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.loading-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.loading-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  animation: fadeInOut 1.5s ease-in-out infinite;
}

/* Spinner Components */
.loading-spinner-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-lg);
}

.loading-spinner-wrapper.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-overlay);
}

.spinner {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.spinner-element {
  border: 3px solid var(--color-surface);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-small .spinner-element {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.spinner-medium .spinner-element {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

.spinner-large .spinner-element {
  width: 60px;
  height: 60px;
  border-width: 4px;
}

.spinner-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Loading button states */
.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* Animations */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.05); }
}

@keyframes fadeInOut {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

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