:root {
	--bg-primary: #121212;
	--bg-secondary: #1a1a1a;
	--bg-tertiary: #242424;
	--text-primary: #e0e0e0;
	--text-secondary: #a0a0a0;
	--border-color: #333333;
	--accent-color: #4a9eff;
	--accent-hover: #3a8eef;
	--font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	font-family: var(--font-family);
	font-size: 14px;
	background-color: var(--bg-primary);
	color: var(--text-primary);
	line-height: 1.5;
	min-height: 100vh;
}

/* ===========================================
   Layout
   =========================================== */

.app {
	display: flex;
	flex-direction: column;
	height: 100vh;
	overflow: hidden;
}

.header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 8px 16px;
	background-color: var(--bg-secondary);
	border-bottom: 1px solid var(--border-color);
	height: 52px;
	flex-shrink: 0;
	z-index: 100;
}

.header h1 {
	font-size: 16px;
	font-weight: 500;
	letter-spacing: 0.5px;
	color: var(--text-primary);
	white-space: nowrap;
}

.header_toolbar {
	display: flex;
	align-items: center;
	gap: 20px;
	background-color: var(--bg-primary);
	padding: 4px 16px;
	border-radius: 4px;
	border: 1px solid var(--border-color);
}

.toolbar_item {
	display: flex;
	align-items: center;
	gap: 10px;
}

.toolbar_item label {
	font-size: 11px;
	text-transform: uppercase;
	letter-spacing: 0.5px;
	color: var(--text-secondary);
	font-weight: 600;
}

.toolbar_divider {
	width: 1px;
	height: 16px;
	background-color: var(--border-color);
}

.toolbar_inputs {
	display: flex;
	align-items: center;
	gap: 6px;
	color: var(--text-secondary);
	font-size: 12px;
}

.header_toolbar .select_input,
.header_toolbar .number_input {
	height: 28px;
	padding: 0 8px;
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: 4px;
	width: auto;
	color: var(--text-primary);
}

.header_toolbar .select_input option {
	background-color: var(--bg-tertiary);
	color: var(--text-primary);
}

.header_toolbar .select_input:hover,
.header_toolbar .number_input:hover {
	border-color: var(--accent-color);
}

.header_toolbar .select_input {
	min-width: 120px;
}

.header_toolbar .number_input {
	width: 50px;
	text-align: center;
}

.github_link {
	display: flex;
	align-items: center;
	color: var(--text-secondary);
	transition: color 0.15s ease;
}

.github_link:hover {
	color: var(--text-primary);
}

.header_actions {
	display: flex;
	gap: 10px;
}

.header_actions .btn {
	flex: none;
	padding: 6px 12px;
	font-size: 13px;
}

.main {
	display: flex;
	flex: 1;
	overflow-y: auto;
	overflow-x: hidden;
	position: relative;
}

/* ===========================================
   Control Panel
   =========================================== */

.control_panel {
	width: 280px;
	background-color: var(--bg-secondary);
	border-right: 1px solid var(--border-color);
	padding: 16px;
	flex-shrink: 0;
	position: relative;
}

.control_group {
	margin-bottom: 20px;
}

.control_group:last-child {
	margin-bottom: 0;
}

.group_title {
	font-size: 11px;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 1px;
	color: var(--text-secondary);
	margin-bottom: 12px;
	padding-bottom: 8px;
	border-bottom: 1px solid var(--border-color);
}

.control {
	margin-bottom: 12px;
}

.control:last-child {
	margin-bottom: 0;
}

.control label {
	display: block;
	font-size: 13px;
	color: var(--text-primary);
	margin-bottom: 6px;
}

/* ===========================================
   Inputs
   =========================================== */

.select_input,
.number_input {
	width: 100%;
	padding: 8px 10px;
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	color: var(--text-primary);
	font-family: inherit;
	font-size: 13px;
	outline: none;
	transition: border-color 0.15s ease;
}

.select_input:focus,
.number_input:focus {
	border-color: var(--accent-color);
}

.shape_param {
	display: none;
	animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
	from {
		opacity: 0;
		transform: translateY(-5px);
	}

	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* Number input spinners */
.number_input::-webkit-outer-spin-button,
.number_input::-webkit-inner-spin-button {
	-webkit-appearance: none;
	margin: 0;
	background-color: var(--bg-tertiary);
	border-left: 1px solid var(--border-color);
	cursor: pointer;
	opacity: 1;
	width: 16px;
	height: 100%;
	position: absolute;
	right: 0;
	top: 0;
}

.number_input {
	position: relative;
	-moz-appearance: textfield;
	appearance: textfield;
}

.number_input:hover::-webkit-inner-spin-button {
	background-color: #2a2a2a;
}

.number_input.small {
	width: 60px;
	text-align: center;
	flex-shrink: 0;
}

.slider_row {
	display: flex;
	align-items: center;
	gap: 10px;
}

.slider_input {
	flex: 1;
	height: 4px;
	background-color: var(--bg-tertiary);
	border: none;
	outline: none;
	cursor: pointer;
	-webkit-appearance: none;
	appearance: none;
}

.slider_input::-webkit-slider-thumb {
	-webkit-appearance: none;
	appearance: none;
	width: 14px;
	height: 14px;
	background-color: var(--accent-color);
	border: none;
	cursor: pointer;
}

.slider_input::-moz-range-thumb {
	width: 14px;
	height: 14px;
	background-color: var(--accent-color);
	border: none;
	cursor: pointer;
}

.slider_input::-webkit-slider-runnable-track {
	height: 4px;
	background-color: var(--bg-tertiary);
}

.slider_input::-moz-range-track {
	height: 4px;
	background-color: var(--bg-tertiary);
}

/* ===========================================
   Buttons
   =========================================== */

.button_row {
	display: flex;
	gap: 10px;
}

.btn {
	flex: 1;
	padding: 10px 16px;
	font-family: inherit;
	font-size: 13px;
	font-weight: 500;
	border: none;
	cursor: pointer;
	transition: background-color 0.15s ease;
}

.btn_primary {
	background-color: var(--accent-color);
	color: #ffffff;
}

.btn_primary:hover {
	background-color: var(--accent-hover);
}

.btn_secondary {
	background-color: var(--bg-tertiary);
	color: var(--text-primary);
	border: 1px solid var(--border-color);
}

.btn_secondary:hover {
	background-color: #2a2a2a;
}

/* ===========================================
   Preview Area
   =========================================== */

.preview_area {
	flex: 1;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 24px;
	background-color: var(--bg-primary);
	position: sticky;
	top: 0;
	height: 100%;
	align-self: flex-start;
}

#preview_canvas {
	max-width: 100%;
	max-height: 100%;
	background-color: #000000;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* ===========================================
   Responsive
   =========================================== */

@media (max-width: 768px) {
	.main {
		flex-direction: column;
	}

	.control_panel,
	.flow_panel {
		width: 100%;
		border-right: none;
		border-left: none;
		border-bottom: 1px solid var(--border-color);
	}

	.preview_area {
		min-height: 400px;
	}
}

/* ===========================================
   Flow Map Panel (Right Sidebar)
   =========================================== */

.flow_panel {
	width: 280px;
	background-color: var(--bg-secondary);
	border-left: 1px solid var(--border-color);
	padding: 16px;
	flex-shrink: 0;
	position: relative;
}

.flow_controls {
	display: none;
}

.flow_controls.visible {
	display: block;
}

/* Mode Toggle */
.header_toolbar .mode_toggle {
	display: flex;
	gap: 0;
	margin: 0;
}

.header_toolbar .mode_btn {
	padding: 4px 10px;
	font-family: inherit;
	font-size: 11px;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.5px;
	background-color: var(--bg-tertiary);
	color: var(--text-secondary);
	border: 1px solid var(--border-color);
	cursor: pointer;
	transition: all 0.15s ease;
}

.header_toolbar .mode_btn.active {
	background-color: var(--accent-color);
	color: #ffffff;
	border-color: var(--accent-color);
}

.header_toolbar .mode_btn:hover:not(.active) {
	background-color: #2a2a2a;
	color: var(--text-primary);
}

/* Tool Buttons */
.tool_row {
	display: flex;
	gap: 8px;
}

.tool_btn {
	flex: 1;
	padding: 12px;
	display: flex;
	align-items: center;
	justify-content: center;
	background-color: var(--bg-tertiary);
	color: var(--text-secondary);
	border: 1px solid var(--border-color);
	cursor: pointer;
	transition: all 0.15s ease;
}

.tool_btn.active {
	background-color: var(--accent-color);
	color: #ffffff;
	border-color: var(--accent-color);
}

.tool_btn:hover:not(.active) {
	background-color: #2a2a2a;
	color: var(--text-primary);
}

/* Toggle Switch */
.toggle_label {
	display: flex;
	align-items: center;
	gap: 12px;
	cursor: pointer;
	font-size: 13px;
	color: var(--text-primary);
	user-select: none;
}

.toggle_input {
	position: absolute;
	opacity: 0;
	width: 0;
	height: 0;
}

.toggle_switch {
	display: inline-block;
	flex-shrink: 0;
	width: 36px;
	height: 18px;
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	position: relative;
	top: 5px;
	overflow: hidden;
	transition: all 0.15s ease;
	margin-right: 5px;
}

.toggle_switch::after {
	content: "";
	position: absolute;
	width: 12px;
	height: 12px;
	background-color: var(--text-secondary);
	top: 2px;
	left: 2px;
	transition: transform 0.15s ease, background-color 0.15s ease;
}

.toggle_input:checked+.toggle_switch {
	background-color: var(--accent-color);
	border-color: var(--accent-color);
}

.toggle_input:checked+.toggle_switch::after {
	transform: translateX(18px);
	background-color: #ffffff;
}

/* Canvas Overlays */
.preview_area {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	background-color: #000;
	border: 1px solid var(--border-color);
	overflow: hidden;
}

#preview_canvas,
#debug_canvas,
#shader_canvas {
	position: absolute;
	transition: opacity 0.2s ease;
}

#preview_canvas {
	z-index: 1;
}

#debug_canvas {
	z-index: 2;
	pointer-events: none;
	display: none;
}

#shader_canvas {
	z-index: 3;
	pointer-events: none;
	opacity: 0;
}

#debug_canvas.visible {
	display: block;
}

#shader_canvas.visible {
	opacity: 1;
	pointer-events: auto;
}

#preview_canvas.hidden {
	opacity: 0;
	pointer-events: none;
}

.brush_param {
	display: none;
	animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
	from {
		opacity: 0;
		transform: translateY(5px);
	}

	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* Control Visibility */
.noise_controls,
.shape_controls,
.flow_controls,
.shader_controls,
.curl_controls {
	display: none;
}

.noise_controls.visible,
.shape_controls.visible,
.flow_controls.visible,
.shader_controls.visible,
.curl_controls.visible {
	display: block;
}

/* Control Panels Stacking */
.control_panel,
.flow_panel {
	z-index: 100;
	overflow: visible !important;
	/* Allow tooltips to pop out */
}

/* Tooltips & Info Icons */
.label_with_info {
	display: flex;
	align-items: center;
	gap: 6px;
	position: relative;
}

.group_title {
	display: flex;
	align-items: center;
	gap: 8px;
	position: relative;
}

.info_icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	color: var(--text-secondary);
	cursor: help;
	opacity: 0.6;
	transition: all 0.2s ease;
	position: relative;
	top: 3px;
	width: 14px;
	height: 14px;
	flex-shrink: 0;
}

.info_icon svg {
	width: 14px;
	height: 14px;
	display: block;
}

.info_icon:hover {
	opacity: 1;
	color: var(--accent-color);
}

.info_icon::after {
	content: attr(data-tooltip);
	position: absolute;
	bottom: calc(100% + 10px);
	background-color: #1e1e1e;
	color: #fff;
	padding: 8px 12px;
	border-radius: 6px;
	font-size: 11px;
	width: 200px;
	line-height: 1.4;
	text-align: center;
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
	border: 1px solid var(--border-color);
	pointer-events: none;
	opacity: 0;
	transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
	z-index: 2000;
}

/* Tooltip Alignment */
.left_tooltip::after {
	left: 0;
	transform: translateY(10px);
}

.right_tooltip::after {
	right: 0;
	transform: translateY(10px);
}

.info_icon:hover::after {
	opacity: 1;
	transform: translateY(0);
}

.left_tooltip:hover::after {
	transform: translateX(0) translateY(0);
}

.right_tooltip:hover::after {
	transform: translateX(0) translateY(0);
}

/* Tooltip Arrow */
.info_icon::before {
	content: "";
	position: absolute;
	bottom: calc(100% + 4px);
	left: 50%;
	transform: translateX(-50%) translateY(10px);
	border: 6px solid transparent;
	border-top-color: var(--border-color);
	pointer-events: none;
	opacity: 0;
	transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
	z-index: 2000;
}

.left_tooltip::before {
	left: 10px;
	transform: translateX(0) translateY(10px);
}

.right_tooltip::before {
	left: auto;
	right: 10px;
	transform: translateX(0) translateY(10px);
}

.info_icon:hover::before {
	opacity: 1;
	transform: translateY(0);
}

.left_tooltip:hover::before {
	transform: translateX(0) translateY(0);
}

.right_tooltip:hover::before {
	transform: translateX(0) translateY(0);
}

.control {
	position: relative;
}