/*
 * Beyond School Toolkit — Budget Calculator frontend styles.
 *
 * Every selector is scoped under .bs-budget-calculator to avoid
 * colliding with the active theme or other plugins (see WordPress
 * Coding Standards: "Prefer plugin-specific class prefixes"). No
 * broad element selectors (button, input, etc.) are used unscoped.
 *
 * Mobile-first: base rules target small screens; a single min-width
 * media query widens the layout for larger viewports rather than the
 * reverse, which keeps the small-screen experience the simple,
 * default case rather than an afterthought.
 */

.bs-budget-calculator {
	--bs-bc-color-text: #1d2327;
	--bs-bc-color-muted: #50575e;
	--bs-bc-color-border: #c3c4c7;
	--bs-bc-color-primary: #2c5f7c;
	--bs-bc-color-primary-hover: #1f4759;
	--bs-bc-color-error: #a52222;
	--bs-bc-color-error-bg: #fbeaea;
	--bs-bc-color-surface: #ffffff;
	--bs-bc-color-surface-alt: #f6f7f7;
	--bs-bc-radius: 6px;
	--bs-bc-spacing: 1rem;

	box-sizing: border-box;
	max-width: 640px;
	margin: 0 auto;
	color: var( --bs-bc-color-text );
	font-size: 1rem;
	line-height: 1.5;
}

.bs-budget-calculator *,
.bs-budget-calculator *::before,
.bs-budget-calculator *::after {
	box-sizing: inherit;
}

.bs-budget-calculator__form {
	display: flex;
	flex-direction: column;
	gap: var( --bs-bc-spacing );
}

.bs-budget-calculator__widget-title {
	margin: 0 0 0.5rem;
}

.bs-budget-calculator__widget-description {
	margin: 0 0 var( --bs-bc-spacing );
	color: var( --bs-bc-color-muted );
}

.bs-budget-calculator__field {
	display: flex;
	flex-direction: column;
	gap: 0.4rem;
}

.bs-budget-calculator__label,
.bs-budget-calculator__legend {
	font-weight: 600;
}

.bs-budget-calculator__fieldset {
	margin: 0;
	padding: 0;
	border: 0;
}

/* Touch-friendly controls: WCAG 2.5.5 recommends at least 44x44px
   tap targets on touch interfaces. */
.bs-budget-calculator__select,
.bs-budget-calculator__input {
	width: 100%;
	min-height: 44px;
	padding: 0.5rem 0.75rem;
	font-size: 1rem;
	color: var( --bs-bc-color-text );
	background-color: var( --bs-bc-color-surface );
	border: 1px solid var( --bs-bc-color-border );
	border-radius: var( --bs-bc-radius );
}

.bs-budget-calculator__option-group {
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
}

.bs-budget-calculator__option {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	min-height: 44px;
	padding: 0.25rem 0.5rem;
	border-radius: var( --bs-bc-radius );
	cursor: pointer;
}

.bs-budget-calculator__option:hover {
	background-color: var( --bs-bc-color-surface-alt );
}

.bs-budget-calculator__option input {
	width: 1.25rem;
	height: 1.25rem;
	flex-shrink: 0;
}

/* Focus states are never removed, only restyled — visible keyboard
   focus is required for keyboard navigability. */
.bs-budget-calculator__select:focus-visible,
.bs-budget-calculator__input:focus-visible,
.bs-budget-calculator__option input:focus-visible,
.bs-budget-calculator__submit:focus-visible {
	outline: 3px solid var( --bs-bc-color-primary );
	outline-offset: 2px;
}

/* Error text is never conveyed by color alone: a left border accent
   and bold weight carry the same meaning for anyone who can't
   perceive the color difference (WCAG 1.4.1). */
.bs-budget-calculator__error {
	margin: 0;
	padding: 0.4rem 0.6rem;
	font-size: 0.9rem;
	font-weight: 600;
	color: var( --bs-bc-color-error );
	background-color: var( --bs-bc-color-error-bg );
	border-left: 4px solid var( --bs-bc-color-error );
	border-radius: 3px;
}

.bs-budget-calculator__error[hidden] {
	display: none;
}

.bs-budget-calculator__submit {
	position: relative;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.5rem;
	min-height: 44px;
	padding: 0.75rem 1.5rem;
	font-size: 1rem;
	font-weight: 600;
	color: #ffffff;
	background-color: var( --bs-bc-color-primary );
	border: 0;
	border-radius: var( --bs-bc-radius );
	cursor: pointer;
}

.bs-budget-calculator__submit:hover {
	background-color: var( --bs-bc-color-primary-hover );
}

.bs-budget-calculator__submit:disabled {
	cursor: not-allowed;
	opacity: 0.7;
}

.bs-budget-calculator__spinner {
	width: 1rem;
	height: 1rem;
	border: 2px solid rgba( 255, 255, 255, 0.4 );
	border-top-color: #ffffff;
	border-radius: 50%;
	animation: bs-budget-calculator-spin 0.8s linear infinite;
}

.bs-budget-calculator__spinner[hidden] {
	display: none;
}

@keyframes bs-budget-calculator-spin {
	to {
		transform: rotate( 360deg );
	}
}

/* Respect a visitor's OS-level preference against motion. */
@media ( prefers-reduced-motion: reduce ) {
	.bs-budget-calculator__spinner {
		animation-duration: 2s;
	}
}

.bs-budget-calculator__status {
	margin-top: 0.75rem;
	font-size: 0.95rem;
	color: var( --bs-bc-color-muted );
}

.bs-budget-calculator__status:empty {
	margin-top: 0;
}

.bs-budget-calculator__results {
	margin-top: 2rem;
	padding: var( --bs-bc-spacing );
	background-color: var( --bs-bc-color-surface-alt );
	border-radius: var( --bs-bc-radius );
}

.bs-budget-calculator__results[hidden] {
	display: none;
}

.bs-budget-calculator__results-heading {
	margin-top: 0;
}

/* A heading given tabindex="-1" for scripted focus should not show a
   focus ring that implies it's a normal interactive/tabbable
   element — it's only a one-time programmatic focus target after
   results appear. */
.bs-budget-calculator__results-heading:focus {
	outline: none;
}

.bs-budget-calculator__breakdown {
	width: 100%;
	border-collapse: collapse;
	font-size: 0.95rem;
}

.bs-budget-calculator__breakdown th,
.bs-budget-calculator__breakdown td {
	padding: 0.5rem;
	text-align: left;
	border-bottom: 1px solid var( --bs-bc-color-border );
}

.bs-budget-calculator__breakdown th {
	font-weight: 600;
}

.bs-budget-calculator__total {
	margin: 1rem 0 0.25rem;
	font-size: 1.15rem;
}

.bs-budget-calculator__per-student {
	margin: 0 0 1rem;
	color: var( --bs-bc-color-muted );
	font-size: 0.9rem;
}

.bs-budget-calculator__disclaimer {
	margin: 0;
	padding-top: 0.75rem;
	border-top: 1px solid var( --bs-bc-color-border );
	color: var( --bs-bc-color-muted );
	font-size: 0.85rem;
}

/* Visually hidden but still available to screen readers — used for
   the table caption, which is redundant on-screen next to the
   visible "Your Estimated Budget" heading but gives assistive
   technology explicit table context. */
.bs-budget-calculator__visually-hidden {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect( 0, 0, 0, 0 );
	white-space: nowrap;
	border: 0;
}

/* Wider viewports: lay grade level / student count side by side, and
   give the two option groups (budget type, categories) more
   breathing room as a horizontal wrap instead of a strict single
   column. Base (mobile) styles above remain the fallback for
   anything narrower. */
@media ( min-width: 640px ) {
	.bs-budget-calculator__form {
		display: grid;
		grid-template-columns: 1fr 1fr;
		column-gap: var( --bs-bc-spacing );
		row-gap: var( --bs-bc-spacing );
	}

	.bs-budget-calculator__fieldset,
	.bs-budget-calculator__submit {
		grid-column: 1 / -1;
	}

	.bs-budget-calculator__option-group {
		flex-direction: row;
		flex-wrap: wrap;
		gap: 1rem;
	}

	.bs-budget-calculator__submit {
		justify-self: start;
	}
}