/* Selection and comment functionality styles - Modern Premium Design */

.selection-tooltip {
  position: absolute;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: saturate(180%) blur(20px);
  border-radius: var(--radius-xl, 1rem);
  padding: 0;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2), 0 4px 16px rgba(0, 0, 0, 0.1);
  opacity: 0;
  transform: translateY(-8px) scale(0.95);
  transition: opacity 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94), 
              transform 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.selection-tooltip.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.comment-btn {
  background: var(--color-accent, #007AFF);
  color: white;
  border: none;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-xl, 1rem);
  font-size: var(--text-sm, 0.875rem);
  font-weight: var(--font-weight-medium, 500);
  font-family: var(--font-family-text, -apple-system, BlinkMacSystemFont, system-ui, sans-serif);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  white-space: nowrap;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.3);
}

.comment-btn:hover {
  background: var(--color-accent-hover, #0056CC);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.4);
}

.comment-btn:active {
  transform: translateY(0);
  transition-duration: 0.1s;
}

/* Highlight selected text */
.user-selection {
  background: rgba(0, 122, 255, 0.15);
  border-radius: var(--radius-sm, 0.25rem);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  transition: background-color 0.2s ease;
}

/* Toast notification for feedback */
.feedback-toast {
  position: fixed;
  bottom: var(--space-8, 2rem);
  right: var(--space-8, 2rem);
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: saturate(180%) blur(20px);
  color: white;
  padding: var(--space-4, 1rem) var(--space-6, 1.5rem);
  border-radius: var(--radius-xl, 1rem);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(16px) scale(0.95);
  transition: opacity 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), 
              transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  z-index: 1001;
  max-width: 400px;
  word-wrap: break-word;
  font-family: var(--font-family-text, -apple-system, BlinkMacSystemFont, system-ui, sans-serif);
  font-size: var(--text-sm, 0.875rem);
  font-weight: var(--font-weight-medium, 500);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.toast-success {
  background: linear-gradient(135deg, var(--color-success, #30D158), #28CD4C);
  border: 1px solid rgba(48, 209, 88, 0.3);
}

.toast-warning {
  background: linear-gradient(135deg, var(--color-warning, #FF9F0A), #FF8C00);
  color: white;
  border: 1px solid rgba(255, 159, 10, 0.3);
}

.toast-error {
  background: linear-gradient(135deg, var(--color-error, #FF3B30), #FF2D2D);
  border: 1px solid rgba(255, 59, 48, 0.3);
}

.feedback-toast.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Mobile-specific adjustments */
@media (max-width: 768px) {
  .selection-tooltip {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    width: auto;
    max-width: calc(100vw - 2rem);
  }
  
  .selection-tooltip.show {
    transform: translateX(-50%) translateY(0);
  }
  
  .comment-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
  }
  
  .feedback-toast {
    bottom: 1rem;
    right: 1rem;
    left: 1rem;
    text-align: center;
  }
}

/* Fun selection animation */
.paper-content ::selection {
  background: rgba(0, 122, 204, 0.3);
  color: inherit;
}

.paper-content ::-moz-selection {
  background: rgba(0, 122, 204, 0.3);
  color: inherit;
}