//
// Forms
// ==============================




// Labels
// ------------------------------

.FormLabel {
	.transition( color @form-animation-duration );
	color: @form-label-color;
	display: inline-block;
	margin-bottom: @spacing-sm;
}




// Groups
// ------------------------------

.FormField {
	margin-bottom: @spacing-md;
	position: relative;
}




// Form Rows
// ------------------------------

.FormRow {
	&:extend(.u-clearfix all);
}
@media (min-width: @screen-sm) {
	.FormRow {
		margin: 0 -(@input-padding-horizontal / 2) @spacing-md;
		min-width: 100%;

		> .FormField {
			display: block; // override .Form--horizontal styles inside .FormRow
			float: left;
			padding: 0 (@input-padding-horizontal / 2);

			// sizes
			&.one-half,
			&.two-quarters,
			&.three-sixths   { width: 50%; }

			&.one-quarter    { width: 25%; }
			&.three-quarters { width: 75%; }

			&.one-third,
			&.two-sixths     { width: 33.333%; }
			&.two-thirds,
			&.four-sixths    { width: 66.666%; }

			&.one-fifth      { width: 20%; }
			&.two-fifths     { width: 40%; }
			&.three-fifths   { width: 60%; }
			&.four-fifths    { width: 80%; }

			&.one-sixth      { width: 16.666%; }
			&.five-sixths    { width: 83.333%; }
		}
	}

	// inside a form field
	.FormField .FormRow {
		margin-bottom: 0;
	}
}




// Validation
// ------------------------------


// message

.form-validation {
	.animation( formValidationMessage @form-animation-duration ease );
	font-size: @font-size-xs;
	margin-top: .5em;
	overflow: hidden;

	.is-invalid & {
		color: @app-danger;
	}
	.is-valid & {
		color: @app-success;
	}
}

@-webkit-keyframes formValidationMessage {
	from { max-height: 0; opacity: 0; }
	to   { max-height: @font-size-base; opacity: 1; }
}
@keyframes formValidationMessage {
	from { max-height: 0; opacity: 0; }
	to   { max-height: @font-size-base; opacity: 1; }
}


// effects on other elements

.FormField.is-invalid {
	.FormLabel {
		color: @app-danger;
	}
	.FormInput {
		border-color: @app-danger;

		&:focus {
			border-color: @app-danger;
			box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 0 3px fade(@app-danger, 10%);
		}
	}
}
.FormField.is-valid {
	.FormLabel {
		color: @app-success;
	}
	.FormInput {
		border-color: @app-success;

		&:focus {
			border-color: @app-success;
			box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 0 3px fade(@app-success, 10%);
		}
	}
}




// ==============================
// Field Types
// ==============================





// Checkbox & Radio
// ------------------------------

.Checkbox,
.Radio {
	display: block;
	margin-bottom: .5em;
}

// fix alignment with checkbox label
// margin top is innefective on checkboxes
.Checkbox__input {
	position: relative;
	top: -1px;
}

.Checkbox__label,
.Radio__label {
	margin-left: .5em;
}

.inline-controls > .Checkbox,
.inline-controls > .Radio,
.Checkbox--inline,
.Radio--inline {
	display: inline-block;
	margin-right: 1em;
}

.Checkbox--disabled,
.Radio--disabled {
	color: @control-disabled-color;
}

@media (min-width: @screen-sm) {
	.Checkbox,
	.Radio {
		line-height: @component-height;
	}
}




// ==============================
// Form Types
// ==============================





// Horizontal Form
// ------------------------------

// 1. ensure stacking on mobile
// 2. add spacing above the element when it's stacked. no need to remove at
//    higher break-points because it becomes a table cell, which aren't
//    effected by margin

.Form--horizontal {
	.FormLabel {
		display: block; // 1

		&:not(:first-child) {
			margin-top: @spacing-md; // 2
		}
	}
}

@media (min-width: @screen-sm) {
	.Form--horizontal {
		// Make the wrapper behave like a table
		.FormField {
			display: table;
			table-layout: fixed;
			width: 100%;

			&.offset-absent-label {
				padding-left: @form-label-width;
			}
		}

		// Fix the label width to allow the field to stretch
		.FormLabel {
			display: table-cell;
			line-height: @component-height;
			margin-bottom: 0;
			vertical-align: top;
			width: @form-label-width;

			&:not(:first-child) {
				padding-left: @grid-gutter-width;
			}
		}

		// reset styles when using rows inside .Form--horizontal
		.FormRow > .FormField {
			display: block;
			margin-bottom: 0;
			min-width: 0;

			> .FormLabel {
				display: block;
			}

			.FormInput {
				margin: 0;
				width: 100%;
			}
		}
	}
}





// Inline Form
// ------------------------------

@media (min-width: @screen-sm) {
	.Form--inline {
		.Checkbox,
		.Radio,
		.FormField {
			display: inline-block;
			padding-left: .25em;
			padding-right: .25em;
			vertical-align: top;

			&:first-child { padding-left: 0; }
			&:last-child { padding-right: 0; }
		}
		.Checkbox,
		.Radio {
			line-height: 2.4em;
			margin: 0 @input-padding-horizontal;
		}
		.FormLabel {
			.u-hidden-visually();
		}
	}
}