/* --- Customization Side Panel --- */
.side-panel {
  position: fixed;
  top: 0;
  right: calc(-1 * var(--side-panel-width) - 10px);
  width: var(--side-panel-width);
  height: 100%;
  background-color: var(--color-surface-bright);
  box-shadow: -10px 0 30px var(--color-shadow);
  z-index: 1100;
  transition: right 0.4s ease-in-out, background-color var(--transition-medium);
  display: flex;
  flex-direction: column;
}

.side-panel.active {
  right: 0;
}

body.side-panel-active .app-container {
  width: calc(100% - var(--side-panel-width));
}

#resizeHandle {
  position: absolute;
  left: -5px;
  top: 0;
  width: 10px;
  height: 100%;
  cursor: col-resize;
  z-index: 1101;
}

#resizeHandle::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0;
  width: 2px;
  height: 100%;
  background-color: var(--color-secondary);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.side-panel:hover #resizeHandle::after {
  opacity: 1;
}

.side-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 20px 15px 20px;
  border-bottom: 1px solid var(--color-secondary);
  flex-shrink: 0;
}

.side-panel-title {
  color: var(--color-text-on-surface);
  font-size: 1.2rem;
  font-weight: 600;
}

.close-panel-button {
  background: transparent;
  border: none;
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  cursor: pointer;
  color: var(--color-text-on-surface);
  transition: var(--transition-medium);
}

.close-panel-button:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-on-surface);
}

.side-panel-body {
  flex-grow: 1;
  overflow-y: auto;
  padding: 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--color-secondary) transparent;
}

.side-panel-body::-webkit-scrollbar {
  width: 5px;
}

.side-panel-body::-webkit-scrollbar-track {
  background: transparent;
}

.side-panel-body::-webkit-scrollbar-thumb {
  background: var(--color-secondary);
  border-radius: 10px;
}

.side-panel-body::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

.customize-section {
  margin-bottom: 25px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-secondary);
}

.customize-section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.customize-section h4 {
  font-size: 1rem;
  color: var(--color-primary);
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.customize-option-group {
  margin-bottom: 15px;
}

#dataManagementControls {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

#dataManagementControls .button {
  width: 100%;
}


#dataManagementControls .button:hover {
  transform: scale(1.02);
}

.customize-option-group label {
  display: block;
  margin-bottom: 10px;
  font-weight: 500;
  color: var(--color-text-on-surface);
  font-size: 0.9rem;
}

.customize-option-group .radio-group {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  justify-content: flex-start;
}

.customize-option-group .radio-item {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text-on-surface); 
}

.customize-option-group .radio-item:hover {
  transition: var(--transition-fast);    
  transform: scale(1.08);
}

.customize-option-group .radio-item input[type="radio"] {
  margin-right: var(--spacing-sm);
  accent-color: var(--color-primary);
}

.customize-option-group .radio-group .button-tertiary {
  flex-basis: 100%;
}

.customize-option-group .slider-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.customize-option-group .slider-value {
  min-width: 35px;
  text-align: right;
  font-size: var(--font-size-sm);
  color: var(--color-text-on-surface);
}

.position-section .customize-option-group {
  display: flex;
  justify-content: space-around;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: 0;
}

.position-section .button {
  flex: 1;
}

.blur-customize-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.blur-customize-group label {
  margin-bottom: 0;
  flex-shrink: 0;
}

.blur-customize-group .blur-input {
  padding: var(--spacing-xs) var(--spacing-sm);
  text-align: center;
}

.blur-customize-group .button-tertiary {
  flex: 0 1 auto;
}

.button-tertiary {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-on-surface);
  padding: 5px 10px;
  font-size: var(--font-size-md);
  box-shadow: none;
}

.button-tertiary:hover {
  background: var(--color-surface-hover);
  color: var(--color-primary);
  opacity: 1;
}

.customize-option-group input[type="range"] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
  width: 100%;
  height: 18px;
}
.customize-option-group input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 10px;
  background: linear-gradient(to right, var(--color-primary) var(--slider-progress-percent), var(--color-secondary) var(--slider-progress-percent));
}
.customize-option-group input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 10px;
  background: var(--color-secondary);
}
.customize-option-group input[type="range"]::-moz-range-progress {
  height: 6px;
  border-radius: 10px;
  background: var(--color-primary);
}
.customize-option-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  margin-top: -6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: none;
  box-shadow: 0 1px 4px var(--color-shadow);
  transition: transform 0.2s ease;
}
.customize-option-group input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: none;
  box-shadow: 0 1px 4px var(--color-shadow);
  transition: transform 0.2s ease;
}
.customize-option-group input[type="range"]::-webkit-slider-thumb:active {
  transform: scale(1.15);
}

.customize-option-group input[type="range"]::-moz-range-thumb:active {
  transform: scale(1.15);
}