/**
 * Shared visual tokens for bbs + platform consoles.
 * Product apps (e.g. paint-board editor) keep their own theme.
 */
:root {
	--ui-font: 'Segoe UI', system-ui, sans-serif;
	--ui-bg: #0f161c;
	--ui-panel: #172028;
	--ui-line: #2a3a46;
	--ui-text: #e8eef2;
	--ui-muted: #9aadb8;
	--ui-accent: #3d8f7a;
	--ui-accent-fg: #04110d;
	--ui-danger: #c45c4a;
	--ui-danger-fg: #fff;
	--ui-radius: 10px;
	--ui-radius-sm: 6px;
	--ui-ring: rgba(61, 143, 122, 0.45);
}

.ui-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.4rem;
	border: 0;
	border-radius: var(--ui-radius-sm);
	padding: 0.45rem 0.85rem;
	font: inherit;
	font-weight: 600;
	font-size: 0.875rem;
	line-height: 1.25;
	cursor: pointer;
	text-decoration: none;
	transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.ui-btn:disabled {
	opacity: 0.5;
	cursor: not-allowed;
}

.ui-btn:focus-visible {
	outline: 2px solid var(--ui-ring);
	outline-offset: 2px;
}

.ui-btn-sm {
	padding: 0.3rem 0.55rem;
	font-size: 0.75rem;
}

.ui-btn-primary {
	background: var(--ui-accent);
	color: var(--ui-accent-fg);
}

.ui-btn-primary:hover:not(:disabled) {
	filter: brightness(1.06);
}

.ui-btn-ghost {
	background: transparent;
	color: var(--ui-text);
	border: 1px solid var(--ui-line);
}

.ui-btn-ghost:hover:not(:disabled) {
	background: rgba(255, 255, 255, 0.04);
}

.ui-btn-outline {
	background: transparent;
	color: var(--ui-text);
	border: 1px solid var(--ui-accent);
}

.ui-btn-danger {
	background: var(--ui-danger);
	color: var(--ui-danger-fg);
}

.ui-btn-danger:hover:not(:disabled) {
	filter: brightness(1.05);
}