// Shared admin-ui rules. The demo page reuses them to show forced states.

// Outline ring for buttons, switches and links.
@mixin focus-ring {
	outline: 2px solid var(--modula-admin-ink);
	outline-offset: 2px;
}

// Border and halo for text-like fields. The transparent outline is drawn
// only in forced-colors mode, where box-shadow disappears.
@mixin field-focus {
	outline: 2px solid transparent;
	border-color: var(--modula-admin-ink);
	box-shadow: var(--modula-admin-focus-field);
}

// Text input, select and textarea share one field look.
@mixin field {
	box-sizing: border-box;
	margin: 0;
	padding: 0 12px;
	border: 1px solid var(--modula-admin-border-field);
	border-radius: var(--modula-admin-radius-lg);
	background: var(--modula-admin-surface);
	color: var(--modula-admin-ink);
	font: inherit;
	font-size: var(--modula-admin-text-body);
	line-height: 1.4;
	box-shadow: none;

	// wp-admin's `select:focus` / `textarea:focus` paint a blue border on
	// mouse focus; the design only changes the field on keyboard focus.
	&:focus {
		border-color: var(--modula-admin-border-field);
		outline: none;
		box-shadow: none;
	}

	&:focus-visible {
		@include field-focus;
	}

	// wp-admin restyles disabled fields (`.wp-core-ui select:disabled`,
	// `input:disabled`); keep the design's colors and only dim them.
	&:disabled {
		border-color: var(--modula-admin-border-field);
		background-color: var(--modula-admin-surface);
		box-shadow: none;
		color: var(--modula-admin-ink);
		opacity: var(--modula-admin-disabled-opacity);
		cursor: default;
	}

	&[aria-invalid="true"] {
		border-color: var(--modula-admin-danger);
	}
}

// A single-line label in a flex row with an icon beside it (buttons, menu
// items, pills, the editor top bar). `align-items: center` centres the
// icon on the label's line box, but Chrome floors the leading above the
// text to a whole pixel and adds the rest below. With the root's 1.45, the
// text therefore sits up to 1px above the box's middle, and the icon reads
// low. With `line-height: 1`, the leading is negative and floors the same
// way. `normal` adds no leading, so the line box is the font's own height,
// and Figtree centres that on its capitals. The control's own height comes
// from `height` or `min-height`, never from the label.
@mixin control-label {
	line-height: normal;
}

// Pill track and its options, shared by Segmented and Tabs so both have one
// look.
@mixin segment-track {
	display: inline-flex;
	flex-wrap: wrap;
	gap: 2px;
	padding: 3px;
	border-radius: var(--modula-admin-radius-lg);
	background: var(--modula-admin-surface-segment);
}

@mixin segment-option {
	@include button-reset;
	@include control-label;
	display: flex;
	align-items: center;
	justify-content: center;
	height: var(--modula-admin-segment-height);
	padding: 0 14px;
	border-radius: var(--modula-admin-radius-md);
	color: var(--modula-admin-ink-segment);
	font-size: var(--modula-admin-text-control);
	white-space: nowrap;
}

@mixin segment-option-active {
	background: var(--modula-admin-surface-raised);
	box-shadow: var(--modula-admin-shadow-raised);
	color: var(--modula-admin-ink);
	font-weight: 600;
}

// Hover fill of full-width list buttons.
@mixin list-hover {
	background: var(--modula-admin-surface-hover);
}

// Full-width list buttons (nav items, search results, the matrix footer).
// Focus is drawn inside the box so the ring is not clipped by the container
// edge or drawn over the neighbouring item.
@mixin list-button {
	@include button-reset;
	width: 100%;
	padding: 0 20px;
	text-align: left;

	&:hover {
		@include list-hover;
	}

	&:focus-visible {
		outline-offset: -2px;
	}
}

// Resets wp-admin button chrome before applying admin-ui styles.
@mixin button-reset {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
	border: none;
	background: none;
	color: inherit;
	font: inherit;
	cursor: pointer;
	box-shadow: none;
}