:root {
	--bg: #0d1117;
	--bg-soft: #161b22;
	--card: #21262d;
	--border: #30363d;
	--text: #e6edf3;
	--muted: #8b949e;
	--accent: #ff5a00;
	--accent-hover: #e82900;
	--ring: rgba(255, 90, 0, 0.28);
}

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

html,
body {
	height: 100%;
}

body {
	font-family: "Segoe UI", Arial, sans-serif;
	background: var(--bg);
	color: var(--text);
	line-height: 1.45;
	overflow: hidden;
}

body.is-modal-open {
	overflow: hidden;
}

a {
	color: inherit;
	text-decoration: none;
}

.site-header {
	height: 56px;
	display: flex;
	align-items: center;
	gap: 16px;
	padding: 0 20px;
	border-bottom: 1px solid var(--border);
	background: rgba(13, 17, 23, 0.96);
}

.logo {
	font-size: 1.2rem;
	font-weight: 800;
	letter-spacing: 0.4px;
	white-space: nowrap;
}

.logo span {
	color: var(--accent);
}

.header-note {
	color: var(--muted);
	font-size: 0.9rem;
}

.main-content {
	height: calc(100% - 56px);
}

.app-shell {
	display: grid;
	grid-template-columns: 360px minmax(0, 1fr);
	height: 100%;
}

.control-panel {
	padding: 22px 20px 28px;
	border-right: 1px solid var(--border);
	background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
	overflow: auto;
}

.control-panel h1 {
	font-size: 1.35rem;
	margin-bottom: 8px;
}

.panel-lead {
	color: var(--muted);
	font-size: 0.92rem;
	margin-bottom: 22px;
}

.field {
	display: grid;
	gap: 8px;
	margin-bottom: 18px;
}

.field > span {
	font-size: 0.9rem;
	color: var(--muted);
	font-weight: 600;
}

.field small {
	color: var(--muted);
	font-size: 0.78rem;
}

.field--choice {
	border: 0;
	padding: 0;
	min-width: 0;
}

.field--choice legend {
	font-size: 0.9rem;
	color: var(--muted);
	font-weight: 600;
	margin-bottom: 8px;
	padding: 0;
}

.plastic-options {
	display: grid;
	gap: 8px;
}

.plastic-card {
	display: grid;
	gap: 2px;
	text-align: left;
	border: 1px solid var(--border);
	background: rgba(230, 237, 243, 0.04);
	color: var(--text);
	border-radius: 10px;
	padding: 10px 12px;
	cursor: pointer;
	font: inherit;
}

.plastic-card small {
	color: var(--muted);
	font-size: 0.78rem;
}

.plastic-card:hover,
.plastic-card.is-active {
	border-color: var(--accent);
}

.plastic-card.is-active {
	background: rgba(255, 90, 0, 0.12);
	box-shadow: 0 0 0 3px var(--ring);
}

.color-grid {
	display: grid;
	grid-template-columns: repeat(6, 1fr);
	gap: 8px;
}

.color-swatch {
	aspect-ratio: 1;
	border-radius: 10px;
	border: 2px solid rgba(230, 237, 243, 0.18);
	cursor: pointer;
	padding: 0;
	background: var(--swatch);
	box-shadow: inset 0 -10px 14px rgba(0, 0, 0, 0.18);
}

.color-swatch:hover,
.color-swatch.is-active {
	border-color: #fff;
}

.color-swatch.is-active {
	box-shadow: 0 0 0 3px var(--ring), inset 0 -10px 14px rgba(0, 0, 0, 0.18);
}

.color-swatch.is-light {
	border-color: rgba(230, 237, 243, 0.45);
}

.field textarea,
.field input[type="number"],
.field input[type="text"],
.field input[type="tel"],
.field select {
	width: 100%;
	border: 1px solid var(--border);
	background: var(--bg);
	color: var(--text);
	border-radius: 10px;
	padding: 10px 12px;
	font: inherit;
}

.field select {
	cursor: pointer;
	appearance: none;
	background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
	background-position: calc(100% - 18px) calc(50% - 3px), calc(100% - 12px) calc(50% - 3px);
	background-size: 6px 6px, 6px 6px;
	background-repeat: no-repeat;
	padding-right: 32px;
}

.upload-btn {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	border: 1px dashed var(--border);
	border-radius: 10px;
	padding: 10px 12px;
	color: var(--muted);
	cursor: pointer;
	font-size: 0.9rem;
}

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

.upload-btn input {
	display: none;
}

.field textarea {
	resize: vertical;
	min-height: 84px;
}

.field textarea:focus,
.field input:focus,
.field select:focus {
	outline: none;
	border-color: var(--accent);
	box-shadow: 0 0 0 3px var(--ring);
}

.range-row {
	display: grid;
	grid-template-columns: 1fr 78px;
	gap: 10px;
	align-items: center;
}

.range-row input[type="range"] {
	width: 100%;
	accent-color: var(--accent);
}

.presets {
	display: flex;
	flex-wrap: wrap;
	gap: 6px;
}

.presets button {
	border: 1px solid var(--border);
	background: rgba(230, 237, 243, 0.04);
	color: var(--text);
	border-radius: 8px;
	padding: 5px 10px;
	cursor: pointer;
	font: inherit;
	font-size: 0.85rem;
}

.presets button:hover,
.presets button.is-active {
	border-color: var(--accent);
	color: #fff;
}

.btn-primary,
.btn-order {
	border: 0;
	border-radius: 10px;
	padding: 12px 16px;
	font: inherit;
	font-weight: 700;
	cursor: pointer;
}

.btn-primary {
	width: 100%;
	margin-top: 6px;
	background: linear-gradient(90deg, var(--accent) 0%, var(--accent-hover) 100%);
	color: #fff;
}

.btn-primary:hover {
	transform: translateY(-1px);
}

.btn-primary:disabled,
.btn-order:disabled {
	opacity: 0.6;
	cursor: not-allowed;
	transform: none;
}

.form-status {
	min-height: 22px;
	margin-top: 10px;
	font-size: 0.9rem;
}

.form-status.is-error {
	color: #ff7b72;
}

.form-status.is-success {
	color: #3fb950;
}

.viewport-panel {
	position: relative;
	background: radial-gradient(circle at 30% 20%, #1c2430 0%, #0d1117 62%);
	overflow: hidden;
}

.viewport-stage {
	position: absolute;
	inset: 0;
}

#letter-canvas {
	display: block;
	width: 100%;
	height: 100%;
	touch-action: none;
}

.viewport-hud {
	position: absolute;
	top: 18px;
	right: 18px;
	display: grid;
	gap: 10px;
	width: min(280px, calc(100% - 36px));
	pointer-events: none;
}

.cost-card {
	pointer-events: auto;
	background: rgba(22, 27, 34, 0.88);
	border: 1px solid var(--border);
	border-radius: 14px;
	padding: 14px;
	backdrop-filter: blur(8px);
}

.cost-row {
	display: flex;
	justify-content: space-between;
	gap: 12px;
	margin-bottom: 8px;
	color: var(--muted);
}

.cost-row strong {
	color: var(--text);
}

.cost-row--price strong {
	color: #fff;
	font-size: 1.15rem;
}

.cost-rate {
	color: var(--muted);
	font-size: 0.78rem;
	margin-bottom: 12px;
}

.btn-order {
	width: 100%;
	margin-top: 0;
}

.order-modal {
	position: fixed;
	inset: 0;
	z-index: 40;
	display: grid;
	place-items: center;
	padding: 18px;
	background: rgba(8, 12, 18, 0.72);
	overflow: auto;
}

.order-modal[hidden] {
	display: none;
}

.order-card {
	position: relative;
	width: min(440px, 100%);
	background: var(--bg-soft);
	border: 1px solid var(--border);
	border-radius: 16px;
	padding: 22px 20px 18px;
	box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.order-card h2 {
	font-size: 1.25rem;
	margin-bottom: 6px;
}

.order-lead {
	color: var(--muted);
	font-size: 0.9rem;
	margin-bottom: 16px;
}

.order-summary {
	border: 1px solid var(--border);
	border-radius: 12px;
	padding: 12px;
	margin-bottom: 16px;
	background: rgba(13, 17, 23, 0.55);
}

.order-summary .cost-row:last-child {
	margin-bottom: 0;
}

.order-close {
	position: absolute;
	top: 10px;
	right: 10px;
	width: 36px;
	height: 36px;
	border: 0;
	border-radius: 8px;
	background: transparent;
	color: var(--muted);
	font-size: 1.5rem;
	line-height: 1;
	cursor: pointer;
}

.order-close:hover {
	color: var(--text);
}

.order-card .btn-primary {
	margin-top: 4px;
}

.order-card .field textarea {
	min-height: 64px;
}

.orbit-hint {
	color: var(--muted);
	font-size: 0.78rem;
	text-align: right;
}

.viewport-empty {
	position: absolute;
	inset: 0;
	display: grid;
	place-items: center;
	color: var(--muted);
	pointer-events: none;
	text-align: center;
	padding: 24px;
}

.viewport-empty.is-hidden {
	display: none;
}

@media (max-width: 860px) {
	html,
	body {
		height: auto;
		min-height: 100%;
		overflow-x: hidden;
		overflow-y: auto;
	}

	body {
		-webkit-overflow-scrolling: touch;
	}

	body.is-modal-open {
		overflow: hidden;
	}

	.main-content {
		height: auto;
		min-height: 0;
	}

	.app-shell {
		grid-template-columns: 1fr;
		height: auto;
		min-height: 0;
	}

	.control-panel {
		border-right: 0;
		border-bottom: 1px solid var(--border);
		overflow: visible;
	}

	.viewport-panel {
		display: flex;
		flex-direction: column;
		min-height: 0;
		overflow: visible;
	}

	.viewport-stage {
		position: relative;
		inset: auto;
		flex: none;
		width: 100%;
		height: min(36dvh, 280px);
		min-height: 200px;
	}

	#letter-canvas {
		flex: none;
		height: 100%;
		min-height: 0;
		touch-action: pan-y;
	}

	.viewport-hud {
		position: relative;
		top: auto;
		right: auto;
		width: 100%;
		padding: 12px 12px 16px;
	}

	.orbit-hint {
		text-align: left;
	}

	.header-note {
		display: none;
	}

	.order-modal {
		place-items: start center;
		padding: 12px;
	}

	.order-card {
		margin: 8px 0 24px;
	}
}