:root {
  /* Color Variables */
  --color-background: #2d2d2d;
  --color-sidebar: #262626;
  --color-text-primary: #e0e0e0;
  --color-text-secondary: #ccc;
  --color-text-dim: #aaa;
  --color-button-primary: #61dafb;
  --color-button-primary-hover: #4fa8d1;
  --color-button-secondary: #333;
  --color-button-secondary-hover: #444;
  --color-button-danger: #d32f2f;
  --color-button-danger-hover: #b71c1c;
  --color-input-background: #333;
  --color-input-border: #444;
  --color-input-border-focus: #61dafb;
  --color-input-border-hover: #555;
  --color-section-header: #61dafb;
  --color-divider: #444;
  --color-highlight: #555;
  --color-panel-background: #252525;
  --color-modal-overlay: rgba(0, 0, 0, 0.8);
  --color-shadow: rgba(0, 0, 0, 0.5);
  --color-button-blue: #1e88e5;
  --color-button-blue-hover: #1976d2;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--color-background);
    color: var(--color-text-primary);
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

.sidebar {
    width: 300px;
    background-color: var(--color-sidebar);
    padding: 20px;
    overflow-y: auto;
    border-right: 1px solid var(--color-divider);
    min-width: 300px;
    max-width: 50%;
    position: relative;
    transition: width 0.05s ease-out;
}

.sidebar-resize-handle {
    position: absolute;
    top: 0;
    right: 0;
    width: 5px;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.1);
    cursor: ew-resize;
    z-index: 100;
}

.sidebar-resize-handle:hover,
.sidebar-resize-handle:active {
    background-color: rgba(0, 0, 0, 0.3);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

#preview-container {
    flex: 1;
    position: relative;
    background-color: var(--color-background);
    overflow: hidden;
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.preview-controls {
    display: flex;
    padding: 10px;
    background-color: var(--color-divider);
    justify-content: center;
    border-top: 1px solid var(--color-divider);
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center; /* Center buttons horizontally */
    gap: 10px;
}

h1 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--color-button-primary);
    text-align: center;
}

h2 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--color-button-primary);
}

.section {
    margin-bottom: 20px;
    border-bottom: 1px solid var(--color-divider);
    padding-bottom: 20px;
    width: 100%;
    overflow: hidden;
}

.list-container {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 10px;
}

.list-item {
    padding: 8px 10px;
    margin-bottom: 5px;
    background-color: var(--color-button-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.list-item:hover {
    background-color: var(--color-button-secondary-hover);
}

.list-item.selected {
    background-color: var(--color-button-primary);
    color: var(--color-background);
}

.controls-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.control-label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

button {
    padding: 8px 16px;
    background-color: var(--color-button-primary);
    border: none;
    border-radius: 4px;
    color: var(--color-background);
    font-weight: bold;
    cursor: pointer;
    margin: 0 5px;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--color-button-primary-hover);
}

input, select {
    padding: 8px;
    background-color: var(--color-input-background);
    border: 1px solid var(--color-input-border);
    border-radius: 4px;
    color: var(--color-text-primary);
}

input[type="range"] {
    width: 100%;
}

input[type="color"] {
    height: 30px;
    width: 60px;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-button-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-highlight);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-highlight);
}

.parameter-section {
    margin-bottom: 20px;
    padding: 10px;
    background-color: var(--color-background);
    border-radius: 5px;
}

.parameter-section h4 {
    font-size: 0.95rem;
    margin-bottom: 10px;
    color: var(--color-button-primary);
    border-bottom: 1px solid var(--color-divider);
    padding-bottom: 5px;
}

.control-group.indented {
    margin-left: 15px;
    border-left: 2px solid var(--color-divider);
    padding-left: 10px;
}

.slider-with-input {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
}

.slider-with-input input[type="range"] {
    flex: 1;
}

.numeric-input {
    width: 60px;
    text-align: right;
    padding: 4px 8px;
    background-color: var(--color-highlight);
    color: var(--color-text-primary);
    border: 1px solid var(--color-input-border);
    border-radius: 3px;
    font-family: monospace;
}

.numeric-input:focus {
    outline: none;
    border-color: var(--color-input-border-focus);
    background-color: var(--color-highlight);
}

.square-color-picker {
    height: 34px;
    width: 34px;
    padding: 2px;
    border: 2px solid var(--color-divider);
    border-radius: 4px;
    cursor: pointer;
    background-color: var(--color-input-background);
}

.square-color-picker:hover {
    border-color: var(--color-button-primary);
}

.texture-parameters-container {
    margin-top: 10px;
    padding: 10px;
    background-color: var(--color-background);
    border-radius: 4px;
}

.segments-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 8px;
}

.lock-container {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 10px 0;
    font-size: 0.9rem;
}

.lock-button {
    padding: 2px 8px;
    font-size: 14px;
    height: 24px;
    min-width: 24px;
    background-color: var(--color-button-secondary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-input-border);
    cursor: pointer;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lock-button:hover {
    background-color: var(--color-button-secondary-hover);
}

.info-container {
    background-color: var(--color-button-secondary);
    border-radius: 4px;
    padding: 8px 12px;
    margin: 10px 0;
    margin-left: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 2px solid var(--color-divider);
}

.info-label {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.info-value {
    color: var(--color-button-primary);
    font-weight: bold;
    font-family: monospace;
    font-size: 1rem;
    background-color: var(--color-highlight);
    padding: 2px 8px;
    border-radius: 3px;
}

.parameter-section:not(:last-child) {
    margin-bottom: 15px;
}

/* Style for the subdivision select dropdown */
.subdivision-select {
    width: 100%;
    padding: 8px 12px;
    background-color: var(--color-input-background);
    border: 1px solid var(--color-input-border);
    border-radius: 4px;
    color: var(--color-text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg fill='white' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/><path d='M0 0h24v24H0z' fill='none'/></svg>");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 30px;
}

.subdivision-select:hover {
    background-color: var(--color-input-border-hover);
    border-color: var(--color-input-border-hover);
}

.subdivision-select:focus {
    outline: none;
    border-color: var(--color-input-border-focus);
    box-shadow: 0 0 0 2px rgba(97, 218, 251, 0.2);
}

/* Preview settings button and panel */
.settings-button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(50, 50, 50, 0.7);
    border: 1px solid var(--color-input-border);
    color: var(--color-text-primary);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: background-color 0.2s;
}

.settings-button:hover {
    background-color: rgba(70, 70, 70, 0.9);
}

.settings-panel {
    position: absolute;
    bottom: 55px;
    right: 10px;
    width: 200px;
    background-color: var(--color-panel-background);
    border: 1px solid var(--color-divider);
    border-radius: 5px;
    padding: 10px;
    z-index: 100;
    box-shadow: 0 2px 8px var(--color-shadow);
}

.setting-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    padding: 5px;
    border-radius: 3px;
}

.setting-item:hover {
    background-color: var(--color-button-secondary-hover);
}

.setting-item input[type="checkbox"] {
    margin-right: 8px;
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.setting-item label {
    font-size: 0.9rem;
    cursor: pointer;
}

/* Noise Layers UI */
.layers-container {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 15px;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 5px;
}

.noise-layer {
  background-color: var(--color-button-secondary);
  border: 1px solid var(--color-divider);
  border-radius: 5px;
  padding: 10px;
}

.layer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.layer-label {
  margin-right: 10px;
  font-weight: bold;
  color: var(--color-button-primary);
}

.noise-type-select {
  flex: 1;
  padding: 5px;
  border-radius: 3px;
  background-color: var(--color-highlight);
  color: var(--color-text-primary);
  border: 1px solid var(--color-input-border);
}

.remove-layer-button {
  width: 24px;
  height: 24px;
  border-radius: 12px;
  margin-left: 10px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  background-color: var(--color-highlight);
  color: var(--color-text-primary);
  border: none;
  cursor: pointer;
}

.remove-layer-button:hover {
  background-color: var(--color-button-danger);
}

.layer-params {
  padding-left: 10px;
  border-left: 2px solid var(--color-divider);
}

.add-layer-button {
  background-color: var(--color-button-blue);
  color: var(--color-text-primary);
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin-top: 10px;
  transition: background-color 0.2s;
}

.add-layer-button:hover {
  background-color: var(--color-button-blue-hover);
}

.strength-slider {
  margin-bottom: 15px;
}

/* Noise Layer Enhancements */
.layer-option-row {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
}

.layer-option-row label {
  flex: 1;
  margin-right: 10px;
}

.color-gradient-container {
  margin-top: 10px;
  background-color: var(--color-button-secondary);
  border-radius: 4px;
  padding: 10px;
  border: 1px solid var(--color-divider);
}

.gradient-stop {
  display: flex;
  align-items: center;
  margin-bottom: 6px;
  padding: 3px;
  border-radius: 3px;
}

.gradient-stop:hover {
  background-color: var(--color-highlight);
}

.gradient-position {
  width: 60px;
  padding: 2px 5px;
  margin-right: 8px;
  text-align: right;
  background-color: var(--color-highlight);
  border: 1px solid var(--color-input-border);
  border-radius: 3px;
  color: var(--color-text-primary);
}

.gradient-color {
  width: 30px;
  height: 24px;
  margin-right: 8px;
  padding: 0;
  border: 1px solid var(--color-input-border);
}

.gradient-preview {
  height: 20px;
  flex: 1;
  margin: 10px 0;
  border-radius: 3px;
  background: linear-gradient(to right, white, black);
}

.gradient-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
}

.add-stop-button {
  flex: 1;
  margin-right: 5px;
}

.remove-stop-button {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-highlight);
  color: var(--color-text-primary);
  border: none;
  margin-left: 5px;
}

.remove-stop-button:hover {
  background-color: var(--color-button-danger);
}

/* JSON Popup Styles */
.json-button {
  position: absolute;
  bottom: 10px;
  right: 55px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(50, 50, 50, 0.7);
  border: 1px solid var(--color-input-border);
  color: var(--color-text-primary);
  font-size: 14px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: background-color 0.2s;
}

.json-button:hover {
  background-color: rgba(70, 70, 70, 0.9);
}

.json-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  max-width: 800px;
  max-height: 80vh;
  background-color: var(--color-panel-background);
  border: 1px solid var(--color-divider);
  border-radius: 5px;
  padding: 20px;
  z-index: 1000;
  box-shadow: 0 4px 20px var(--color-shadow);
  display: flex;
  flex-direction: column;
}

.json-popup-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.json-popup-header h3 {
  margin: 0;
  color: var(--color-button-primary);
}

.json-popup-close {
  background: none;
  border: none;
  color: var(--color-text-dim);
  font-size: 20px;
  cursor: pointer;
  padding: 0 5px;
}

.json-popup-close:hover {
  color: var(--color-text-primary);
}

.json-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-divider);
  margin-bottom: 15px;
}

.json-tab {
  padding: 8px 16px;
  cursor: pointer;
  background-color: transparent;
  border: none;
  color: var(--color-text-secondary);
  border-bottom: 3px solid transparent;
}

.json-tab.active {
  color: var(--color-button-primary);
  border-bottom: 3px solid var(--color-button-primary);
}

.json-content {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.json-textarea {
  flex: 1;
  min-height: 300px;
  padding: 10px;
  background-color: var(--color-background);
  border: 1px solid var(--color-divider);
  border-radius: 4px;
  color: var(--color-text-primary);
  font-family: 'Consolas', monospace;
  font-size: 14px;
  resize: none;
  white-space: pre;
  tab-size: 2;
}

.json-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 15px;
  gap: 10px;
}

/* Overlay for modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-modal-overlay);
  z-index: 999;
}

/* Additional styling for the new buttons */
.preview-button-group {
    position: absolute;
    bottom: 10px;
    right: 10px;
    display: flex;
    gap: 10px;
    z-index: 10;
    justify-content: center; /* Center buttons horizontally */
    align-items: center; /* Center buttons vertically */
}

.preview-control-button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--color-button-secondary);
    border: 1px solid var(--color-input-border);
    color: var(--color-text-primary);
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: background-color 0.2s;
    font-family: ui-serif;
}

.preview-control-button:hover {
    background-color: var(--color-button-secondary-hover);
}

.preview-controls button {
    padding: 8px 12px;
    background-color: var(--color-button-secondary);
    border: 1px solid var(--color-input-border);
    color: var(--color-text-primary);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.preview-controls button:hover {
    background-color: var(--color-button-secondary-hover);
}

/* Update checkbox label style */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    margin: 0;
    cursor: pointer;
    order: -1; /* Ensures checkbox always appears before text */
}

/* Update json-button position and style - reuse preview-control-button */
#json-button {
    position: absolute;
    bottom: 10px;
    left: 10px;
}