/* ===== CSS Custom Properties / Theming ===== */
:root {
	--font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	--radius: 8px;
	--radius-sm: 4px;
	--transition: 0.2s ease;
}

[data-theme="light"] {
	--bg: #f0f2f5;
	--bg-panel: #ffffff;
	--bg-panel-alt: #f8f9fb;
	--text: #1a1a2e;
	--text-secondary: #4a4d65;
	--text-muted: #6b6f88;
	--border: #d0d4de;
	--border-light: #e2e6f0;
	--accent: #4f6df5;
	--accent-hover: #3b5bdb;
	--danger: #e03131;
	--danger-hover: #c92a2a;
	--shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
	--shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.1);
	--input-bg: #f4f5f8;
	--preview-bg: #e2e6ec;
	--select-text: #1a1a2e;
	--optgroup-text: #3a3d55;
}

[data-theme="dark"] {
	--bg: #0f1117;
	--bg-panel: #1a1c25;
	--bg-panel-alt: #22242f;
	--text: #e4e6f0;
	--text-secondary: #a0a3bd;
	--text-muted: #7a7e98;
	--border: #2e3044;
	--border-light: #262838;
	--accent: #6c8aff;
	--accent-hover: #8da4ff;
	--danger: #ff6b6b;
	--danger-hover: #ff8787;
	--shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 4px 12px rgba(0, 0, 0, 0.2);
	--shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.4);
	--input-bg: #262838;
	--preview-bg: #151720;
	--select-text: #e4e6f0;
	--optgroup-text: #b0b3cc;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html,
body {
	height: 100%;
	font-family: var(--font);
	font-size: 14px;
	background: var(--bg);
	color: var(--text);
	transition: background var(--transition), color var(--transition);
	overflow: hidden;
}

/* ===== App Layout: 2-column grid ===== */
.app-layout {
	display: grid;
	grid-template-columns: 380px 1fr;
	height: 100vh;
}

/* ===== Floating Theme Toggle (top-right of window) ===== */
.theme-toggle {
	position: fixed;
	top: 12px;
	right: 16px;
	z-index: 100;
	display: flex;
	background: var(--bg-panel);
	border: 1px solid var(--border);
	border-radius: 20px;
	padding: 2px;
	gap: 2px;
	box-shadow: var(--shadow);
}

.theme-btn {
	all: unset;
	cursor: pointer;
	width: 30px;
	height: 26px;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: 14px;
	font-size: 14px;
	transition: background var(--transition), box-shadow var(--transition);
}

.theme-btn.active {
	background: var(--accent);
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.theme-btn:hover:not(.active) {
	background: var(--border-light);
}

/* ===== Sidebar ===== */
.sidebar {
	display: flex;
	flex-direction: column;
	overflow-y: auto;
	border-right: 1px solid var(--border);
	background: var(--bg-panel);
	scrollbar-width: thin;
	scrollbar-color: var(--border) transparent;
}

.sidebar::-webkit-scrollbar {
	width: 6px;
}

.sidebar::-webkit-scrollbar-track {
	background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
	background: var(--border);
	border-radius: 3px;
}

/* ===== Panels ===== */
.panel {
	padding: 16px 20px;
}

.panel-config-select {
	border-bottom: 1px solid var(--border);
}

.panel-params {
	flex: 1;
}

/* ===== App Title ===== */
.app-title {
	font-size: 1.15rem;
	font-weight: 700;
	letter-spacing: -0.01em;
	color: var(--text);
	margin-bottom: 12px;
}

/* ===== Config List ===== */
.config-list {
	display: flex;
	flex-direction: column;
	gap: 6px;
	margin-bottom: 10px;
}

.config-item {
	padding: 8px 12px;
	border: 1px solid var(--border);
	border-radius: var(--radius);
	background: var(--bg-panel-alt);
	color: var(--text);
	font-family: var(--font);
	font-size: 0.85rem;
	font-weight: 500;
	cursor: pointer;
	transition: all var(--transition);
	display: flex;
	align-items: center;
	gap: 6px;
}

.config-name {
	flex: 1;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.config-rename-btn {
	background: transparent;
	border: none;
	color: var(--text-muted);
	cursor: pointer;
	padding: 2px 4px;
	border-radius: var(--radius-sm);
	transition: all var(--transition);
	display: flex;
	align-items: center;
	justify-content: center;
}

.config-rename-btn:hover {
	color: var(--accent);
	background: var(--border);
}

.config-item:hover {
	border-color: var(--accent);
}

.config-item.active {
	background: var(--accent);
	color: #fff;
	border-color: var(--accent);
}

.config-item-editing {
	background: transparent;
	border: 1px solid var(--accent);
	border-radius: var(--radius);
	color: var(--text);
	font-family: var(--font);
	font-size: 0.85rem;
	font-weight: 500;
	padding: 7px 11px;
	outline: none;
	width: 100%;
}

.config-actions {
	display: flex;
	gap: 8px;
}

/* ===== Buttons ===== */
.btn {
	padding: 7px 14px;
	border: 1px solid var(--border);
	border-radius: var(--radius);
	background: var(--bg-panel-alt);
	color: var(--text);
	font-family: var(--font);
	font-size: 0.85rem;
	font-weight: 500;
	cursor: pointer;
	transition: all var(--transition);
	white-space: nowrap;
}

.btn:hover {
	border-color: var(--accent);
	color: var(--accent);
}

.btn-sm {
	padding: 5px 10px;
	font-size: 0.8rem;
}

.btn-danger {
	color: var(--danger);
	border-color: var(--danger);
}

.btn-danger:hover {
	background: var(--danger);
	color: #fff;
	border-color: var(--danger);
}

/* ===== Panel Header with Unit Toggle ===== */
.panel-params-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-bottom: 12px;
}

.panel-title {
	font-size: 1rem;
	font-weight: 600;
}

.unit-toggle {
	display: flex;
	background: var(--input-bg);
	border: 1px solid var(--border);
	border-radius: 14px;
	padding: 2px;
	gap: 2px;
}

.unit-btn {
	all: unset;
	cursor: pointer;
	padding: 3px 10px;
	font-size: 0.78rem;
	font-weight: 600;
	font-family: var(--font);
	border-radius: 12px;
	color: var(--text-secondary);
	transition: all var(--transition);
}

.unit-btn.active {
	background: var(--accent);
	color: #fff;
}

.unit-btn:hover:not(.active) {
	background: var(--border-light);
}

/* ===== Form Elements ===== */
.form-group {
	margin-bottom: 12px;
}

.form-group label {
	display: block;
	font-size: 0.78rem;
	font-weight: 500;
	color: var(--text-secondary);
	margin-bottom: 4px;
	text-transform: uppercase;
	letter-spacing: 0.04em;
}

.input-with-unit {
	position: relative;
	display: flex;
	align-items: center;
}

.input-with-unit input {
	padding-right: 36px !important;
}

.input-with-unit .unit-label {
	position: absolute;
	right: 12px;
	color: var(--text-muted);
	font-size: 0.82rem;
	pointer-events: none;
}

.form-group input[type="number"],
.form-group textarea,
.form-group select {
	width: 100%;
	padding: 7px 10px;
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	background: var(--input-bg);
	color: var(--text);
	font-family: var(--font);
	font-size: 0.9rem;
	transition: border-color var(--transition);
}

.form-group input[type="number"]:focus,
.form-group textarea:focus,
.form-group select:focus {
	outline: none;
	border-color: var(--accent);
}

/* Remove number input spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
	-webkit-appearance: none;
	margin: 0;
}

input[type="number"] {
	-moz-appearance: textfield;
	appearance: textfield;
}

.form-row {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 12px;
}

.form-group-inline {
	display: flex;
	align-items: center;
	gap: 8px;
	margin-bottom: 0;
}

.form-group-inline label {
	margin-bottom: 0;
	white-space: nowrap;
}

.input-narrow {
	width: 60px !important;
}

/* ===== Description Textarea ===== */
.config-description {
	resize: none;
	overflow: hidden;
	min-height: 32px;
	line-height: 1.5;
}

/* ===== Radio & Checkbox ===== */
.radio-group {
	display: flex;
	gap: 16px;
}

.radio-label,
.checkbox-label {
	display: flex;
	align-items: center;
	gap: 6px;
	font-size: 0.9rem;
	cursor: pointer;
	color: var(--text);
}

.radio-label input,
.checkbox-label input {
	accent-color: var(--accent);
}

/* ===== Divider ===== */
.divider {
	border: none;
	border-top: 1px solid var(--border-light);
	margin: 14px 0;
}

/* ===== Slots ===== */
.slots-section {
	margin-bottom: 8px;
}

.slot-list {
	display: flex;
	flex-direction: column;
	gap: 6px;
	position: relative;
}

.slot-item {
	display: flex;
	gap: 6px;
	align-items: center;
	position: relative;
}

/* Blue drop indicator line shown during drag-reorder — flows as a flex sibling, no absolute positioning */
.drag-drop-indicator {
	height: 2px;
	background: var(--accent);
	border-radius: 2px;
	pointer-events: none;
	box-shadow: 0 0 5px var(--accent);
	margin: 1px 0;
	flex-shrink: 0;
}

.slot-index {
	width: 20px;
	flex-shrink: 0;
	font-size: 0.75rem;
	font-weight: 600;
	color: var(--text-muted);
	text-align: center;
}

/* ===== Custom Select for Bit Types ===== */
.custom-select {
	position: relative;
	width: 40px;
	height: 30px;
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	background: var(--input-bg);
	cursor: pointer;
	font-family: var(--font);
	font-size: 0.82rem;
	user-select: none;
	transition: border-color var(--transition);
}

.custom-select:focus,
.custom-select.select-active {
	border-color: var(--accent);
	outline: none;
	z-index: 10;
}

.select-selected {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	height: 100%;
	color: var(--select-text);
}

.select-items {
	position: absolute;
	top: 100%;
	left: 0;
	background: var(--bg-panel);
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	box-shadow: var(--shadow-lg);
	max-height: 70vh;
	width: max-content;
	min-width: 160px;
	overflow-y: auto;
	z-index: 99;
	padding: 4px 0;
	margin-top: 2px;
}

.select-hide {
	display: none;
}

.select-optgroup {
	padding: 6px 12px;
	font-size: 0.75rem;
	font-weight: 600;
	color: var(--optgroup-text);
	text-transform: uppercase;
	letter-spacing: 0.05em;
	background: var(--bg-panel-alt);
}

.select-option {
	padding: 6px 12px;
	display: flex;
	align-items: center;
	gap: 8px;
	color: var(--select-text);
	cursor: pointer;
	transition: background var(--transition);
}

.select-option:hover,
.select-option.selected {
	background: var(--input-bg);
}

.select-option.selected {
	font-weight: 600;
	color: var(--accent);
}

.select-option-icon {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 20px;
	height: 20px;
}

.select-option-text {
	flex: 1;
}

.slot-label-input {
	height: 30px;
	padding: 5px 8px;
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	background: var(--input-bg);
	color: var(--text);
	font-family: var(--font);
	font-size: 0.85rem;
	transition: border-color var(--transition);
	min-width: 0;
	flex: 1;
}

.slot-label-input:focus {
	outline: none;
	border-color: var(--accent);
}

/* ===== Preview Area ===== */
.preview-area {
	position: relative;
	background: var(--preview-bg);
	overflow: hidden;
}

.btn-delete-slot:hover svg {
	color: var(--danger, #dc3545);
}

.preview-container {
	width: 100%;
	height: 100%;
}

.preview-container canvas {
	display: block;
	width: 100%;
	height: 100%;
}

.btn-download {
	position: absolute;
	bottom: 24px;
	right: 24px;
	padding: 12px 24px;
	background: var(--accent);
	color: #fff;
	border: none;
	border-radius: var(--radius);
	font-size: 0.95rem;
	font-weight: 600;
	box-shadow: var(--shadow-lg);
	cursor: pointer;
	transition: all var(--transition);
	z-index: 10;
}

.btn-download:hover {
	background: var(--accent-hover);
	transform: translateY(-1px);
	box-shadow: 0 6px 28px rgba(0, 0, 0, 0.2);
}

/* ===== Modal ===== */
.modal-overlay {
	position: fixed;
	inset: 0;
	background: rgba(0, 0, 0, 0.5);
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 1000;
	backdrop-filter: blur(4px);
}

.modal {
	background: var(--bg-panel);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 24px;
	min-width: 320px;
	max-width: 400px;
	box-shadow: var(--shadow-lg);
}

.modal h3 {
	margin-bottom: 12px;
	font-size: 1.1rem;
}

.modal p {
	margin-bottom: 20px;
	color: var(--text-secondary);
	line-height: 1.5;
}

.modal-actions {
	display: flex;
	justify-content: flex-end;
	gap: 8px;
}

/* ===== Sidebar Footer CTA ===== */
.sidebar-footer {
	padding: 14px 20px;
	text-align: center;
	font-size: 0.78rem;
	color: var(--text-muted);
	border-top: 1px solid var(--border-light);
}

.sidebar-footer a {
	color: var(--text-muted);
	text-decoration: none;
	transition: color var(--transition);
}

.sidebar-footer a:hover {
	color: var(--accent);
}

.footer-separator {
	margin: 0 6px;
	opacity: 0.5;
}

/* ===== Mobile Responsive ===== */
@media (max-width: 768px) {

	html,
	body {
		overflow: auto;
		height: auto;
	}

	.app-layout {
		grid-template-columns: 1fr;
		height: auto;
		min-height: 100vh;
	}

	.sidebar {
		order: 1;
		border-right: none;
		border-top: 1px solid var(--border);
		overflow-y: visible;
	}

	.preview-area {
		order: 0;
		height: 60vw;
		min-height: 260px;
		max-height: 400px;
	}

	.btn-download {
		bottom: 16px;
		right: 16px;
		padding: 10px 18px;
		font-size: 0.85rem;
	}

	.theme-toggle {
		top: 8px;
		right: 8px;
	}
}