:root {
	--ppt-bg: #f5f7fb;
	--ppt-surface: #ffffff;
	--ppt-border: #e5e7eb;
	--ppt-text: #111827;
	--ppt-muted: #6b7280;
	--ppt-primary: #7c3aed;
	--ppt-primary-dark: #6d28d9;
	--ppt-shadow: 0 12px 30px rgba(17, 24, 39, 0.08);
	--ppt-radius-lg: 18px;
	--ppt-radius-md: 12px;
	--ppt-radius-sm: 10px;
}

*,
*::before,
*::after {
	box-sizing: border-box;
}

.ppt-app {
	display: grid;
	grid-template-columns: 320px minmax(0, 1fr) 320px;
	gap: 24px;
	max-width: 1600px;
	margin: 32px auto;
	padding: 20px;
	font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
	color: var(--ppt-text);
	background: var(--ppt-bg);
}

.ppt-sidebar,
.ppt-workspace,
.ppt-export {
	display: flex;
	flex-direction: column;
	gap: 20px;
	min-width: 0;
}

.ppt-panel {
	background: var(--ppt-surface);
	border: 1px solid var(--ppt-border);
	border-radius: var(--ppt-radius-lg);
	padding: 20px;
	box-shadow: var(--ppt-shadow);
}

.ppt-panel__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	margin-bottom: 16px;
}

.ppt-panel__header h3 {
	margin: 0;
	font-size: 18px;
	line-height: 1.2;
}

.ppt-brand {
	display: flex;
	align-items: center;
	gap: 14px;
}

.ppt-brand__icon {
	width: 56px;
	height: 56px;
	border-radius: 16px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: linear-gradient(135deg, #8b5cf6, #6d28d9);
	color: #fff;
	font-size: 24px;
	font-weight: 700;
}

.ppt-brand__text h2 {
	margin: 0 0 6px;
	font-size: 22px;
}

.ppt-brand__text p {
	margin: 0;
	color: var(--ppt-muted);
	font-size: 14px;
}

.ppt-badge {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 6px 10px;
	border-radius: 999px;
	background: rgba(124, 58, 237, 0.1);
	color: var(--ppt-primary-dark);
	font-size: 12px;
	font-weight: 600;
}

.ppt-upload-box {
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.ppt-hidden-input {
	display: none;
}

.ppt-upload-help {
	margin: 0;
	font-size: 13px;
	color: var(--ppt-muted);
}

.ppt-ratio-grid,
.ppt-shape-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 10px;
}

.ppt-chip {
	padding: 10px 12px;
	border: 1px solid var(--ppt-border);
	border-radius: 12px;
	background: #fff;
	cursor: pointer;
	font-size: 14px;
	font-weight: 600;
	color: var(--ppt-text);
	transition: all 0.2s ease;
}

.ppt-chip:hover {
	border-color: var(--ppt-primary);
	color: var(--ppt-primary-dark);
}

.ppt-chip.is-active {
	background: var(--ppt-primary);
	border-color: var(--ppt-primary);
	color: #fff;
}

.ppt-control-group {
	display: flex;
	flex-direction: column;
	gap: 8px;
	margin-bottom: 14px;
}

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

.ppt-control-group label {
	font-size: 14px;
	font-weight: 600;
}

.ppt-control-group input[type="range"],
.ppt-control-group input[type="color"],
.ppt-control-group select {
	width: 100%;
}

.ppt-control-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
}

.ppt-toggle {
	display: flex;
	align-items: center;
	gap: 10px;
	font-size: 14px;
	font-weight: 600;
	margin-bottom: 16px;
}

.ppt-btn {
	border: none;
	border-radius: 12px;
	padding: 12px 16px;
	cursor: pointer;
	font-size: 14px;
	font-weight: 700;
	transition: all 0.2s ease;
}

.ppt-btn--primary {
	background: var(--ppt-primary);
	color: #fff;
}

.ppt-btn--primary:hover {
	background: var(--ppt-primary-dark);
}

.ppt-btn--secondary {
	background: #f3f4f6;
	color: var(--ppt-text);
	border: 1px solid var(--ppt-border);
}

.ppt-btn--secondary:hover {
	background: #e5e7eb;
}

.ppt-btn--ghost {
	background: transparent;
	color: var(--ppt-muted);
	border: 1px dashed var(--ppt-border);
}

.ppt-btn--ghost:hover {
	color: var(--ppt-text);
	border-color: #cbd5e1;
}

.ppt-btn--block {
	width: 100%;
}

.ppt-btn[disabled] {
	opacity: 0.5;
	cursor: not-allowed;
}

.ppt-workspace__header {
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: 16px;
	background: var(--ppt-surface);
	border: 1px solid var(--ppt-border);
	border-radius: var(--ppt-radius-lg);
	padding: 20px;
	box-shadow: var(--ppt-shadow);
}

.ppt-workspace__header h1 {
	margin: 0 0 6px;
	font-size: 28px;
}

.ppt-workspace__header p {
	margin: 0;
	color: var(--ppt-muted);
}

.ppt-status {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 8px 12px;
	border-radius: 999px;
	background: #eef2ff;
	color: #4338ca;
	font-size: 13px;
	font-weight: 700;
}

.ppt-canvas-stage {
	background: var(--ppt-surface);
	border: 1px solid var(--ppt-border);
	border-radius: var(--ppt-radius-lg);
	padding: 24px;
	box-shadow: var(--ppt-shadow);
	min-height: 640px;
	display: flex;
	align-items: center;
	justify-content: center;
}

.ppt-empty-state {
	width: 100%;
	max-width: 720px;
	min-height: 420px;
	border: 2px dashed #d1d5db;
	border-radius: 24px;
	background: #fafafa;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	text-align: center;
	padding: 32px;
}

.ppt-empty-state__icon {
	font-size: 56px;
	margin-bottom: 16px;
}

.ppt-empty-state h3 {
	margin: 0 0 10px;
	font-size: 28px;
}

.ppt-empty-state p {
	margin: 0 0 20px;
	font-size: 15px;
	color: var(--ppt-muted);
	max-width: 460px;
}

.ppt-preview-shell {
	width: 100%;
}

.ppt-preview-toolbar {
	display: flex;
	flex-wrap: wrap;
	gap: 12px;
	margin-bottom: 16px;
}

.ppt-preview-toolbar__item {
	display: inline-flex;
	align-items: center;
	padding: 8px 12px;
	border-radius: 999px;
	background: #f3f4f6;
	font-size: 13px;
	font-weight: 700;
	color: var(--ppt-text);
}

.ppt-preview-frame {
	width: 100%;
	min-height: 520px;
	border-radius: 24px;
	background: linear-gradient(180deg, #f8fafc, #eef2f7);
	border: 1px solid #dbe3ec;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 20px;
	overflow: hidden;
}

#ppt-preview-canvas {
	max-width: 100%;
	max-height: 100%;
	border-radius: 18px;
	background: #fff;
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.ppt-bottom-panels {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 20px;
}

.ppt-summary-list,
.ppt-tips-list {
	list-style: none;
	padding: 0;
	margin: 0;
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.ppt-summary-list li,
.ppt-tips-list li {
	font-size: 14px;
	line-height: 1.5;
	color: var(--ppt-text);
}

.ppt-summary-list span {
	color: var(--ppt-muted);
}

.ppt-drop-active {
	outline: 3px solid rgba(124, 58, 237, 0.2);
	outline-offset: 3px;
}

@media (max-width: 1280px) {
	.ppt-app {
		grid-template-columns: 280px minmax(0, 1fr);
	}

	.ppt-export {
		grid-column: 1 / -1;
		display: grid;
		grid-template-columns: repeat(3, minmax(0, 1fr));
	}
}

@media (max-width: 1024px) {
	.ppt-app {
		grid-template-columns: 1fr;
	}

	.ppt-export {
		grid-template-columns: 1fr;
	}

	.ppt-bottom-panels {
		grid-template-columns: 1fr;
	}

	.ppt-workspace__header {
		flex-direction: column;
		align-items: flex-start;
	}
}

@media (max-width: 640px) {
	.ppt-app {
		padding: 12px;
		margin: 20px auto;
		gap: 16px;
	}

	.ppt-panel,
	.ppt-workspace__header,
	.ppt-canvas-stage {
		padding: 16px;
	}

	.ppt-ratio-grid,
	.ppt-shape-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.ppt-empty-state {
		min-height: 320px;
		padding: 20px;
	}

	.ppt-empty-state h3 {
		font-size: 22px;
	}

	.ppt-preview-frame {
		min-height: 360px;
	}
}