/* =========================================================
   Inputs — Design System baseline
   Token sorgente: INPUT.md v1.0
   Implementa: .bg-field (atom), .bg-input, .bg-textarea, .bg-checkbox
              + stati :placeholder-shown, :disabled, .is-error, autofill
   Differiti: .bg-select, .bg-radio, .bg-input__submit, .bg-input__clear
   Dipendenze: variables.css, card.css (per scope paper --p-*)
   ========================================================= */

/* --------- .bg-field — wrapper atom -------------------------------------
   Label sopra, helper/error sotto.
   -------------------------------------------------------------------------- */

.bg-field {
	display: flex;
	flex-direction: column;
	gap: var(--gap-tight);
	min-width: 0;
}

.bg-field__label {
	font-family: var(--f-sans);
	font-size: 0.72rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: var(--track-wide);
	color: var(--text-2);
	line-height: 1.3;
	margin: 0;
}

.bg-field__helper {
	font-family: var(--f-sans);
	font-size: 0.8rem;
	font-weight: 400;
	letter-spacing: var(--track-body);
	color: var(--text-3);
	line-height: 1.6;
	margin: 0;
}

.bg-field__error {
	font-family: var(--f-sans);
	font-size: 0.8rem;
	font-weight: 500;
	letter-spacing: var(--track-body);
	color: var(--accent);
	line-height: 1.6;
	margin: 0;
	display: none;
}

.bg-field.is-error .bg-field__error {
	display: block;
}

/* --------- .bg-input / .bg-textarea — campi standard --------------------
   Border-radius 2px (--radius-btn). Focus: border --text + inset shadow 1px.
   -------------------------------------------------------------------------- */

.bg-input,
.bg-textarea {
	font-family: var(--f-sans);
	font-size: 0.95rem;
	font-weight: 400;
	line-height: 1.5;
	letter-spacing: var(--track-body);
	color: var(--text);
	background-color: transparent;
	border: 1px solid var(--border);
	border-radius: var(--radius-btn);
	padding: 0.85rem 1rem;
	width: 100%;
	max-width: 100%;
	box-sizing: border-box;
	transition:
		border-color var(--dur-s) var(--ease-out),
		box-shadow var(--dur-s) var(--ease-out);
	-webkit-font-smoothing: antialiased;
}

.bg-textarea {
	min-height: 6rem;
	resize: vertical;
	font-family: inherit;
}

.bg-input::placeholder,
.bg-textarea::placeholder {
	color: var(--text-3);
	opacity: 1;
	font-style: normal;
}

.bg-input:hover,
.bg-textarea:hover {
	border-color: var(--border-hover);
}

.bg-input:focus-visible,
.bg-textarea:focus-visible {
	outline: none;
	border-color: var(--text);
	box-shadow: inset 0 0 0 1px var(--text);
}

/* Stato error */
.bg-input.is-error,
.bg-input[aria-invalid="true"],
.bg-textarea.is-error,
.bg-textarea[aria-invalid="true"] {
	border-color: var(--accent);
}

.bg-input.is-error:focus-visible,
.bg-input[aria-invalid="true"]:focus-visible,
.bg-textarea.is-error:focus-visible,
.bg-textarea[aria-invalid="true"]:focus-visible {
	outline: none;
	border-color: var(--accent);
	box-shadow: inset 0 0 0 1px var(--accent);
}

/* Stato disabled */
.bg-input:disabled,
.bg-textarea:disabled {
	opacity: 0.4;
	cursor: not-allowed;
	pointer-events: none;
}

/* Autofill Chrome — maschera il giallo */
.bg-input:-webkit-autofill,
.bg-input:-webkit-autofill:hover,
.bg-input:-webkit-autofill:focus,
.bg-textarea:-webkit-autofill,
.bg-textarea:-webkit-autofill:hover,
.bg-textarea:-webkit-autofill:focus {
	-webkit-box-shadow: 0 0 0 100px var(--bg) inset;
	-webkit-text-fill-color: var(--text);
	caret-color: var(--text);
	transition: background-color 9999s ease-in-out 0s;
}

/* --------- .bg-checkbox — consenso boolean ------------------------------
   Custom indicator (square 1rem) + label inline.
   Pattern: <label class="bg-checkbox"><input type=checkbox><span indicator><span label></label>
   -------------------------------------------------------------------------- */

.bg-checkbox {
	display: inline-flex;
	align-items: flex-start;
	gap: var(--gap-inline);
	cursor: pointer;
	font-family: var(--f-sans);
	font-size: 0.95rem;
	line-height: 1.5;
	color: var(--text);
	-webkit-user-select: none;
	user-select: none;
}

.bg-checkbox input[type="checkbox"] {
	position: absolute;
	opacity: 0;
	width: 1px;
	height: 1px;
	margin: 0;
	pointer-events: none;
}

.bg-checkbox__indicator {
	flex: 0 0 1rem;
	width: 1rem;
	height: 1rem;
	border: 1px solid var(--border-hover);
	border-radius: var(--radius-btn);
	background-color: transparent;
	display: inline-block;
	position: relative;
	margin-top: 0.2em;
	transition:
		border-color var(--dur-s) var(--ease-out),
		background-color var(--dur-s) var(--ease-out);
}

.bg-checkbox__indicator::after {
	content: "";
	position: absolute;
	left: 50%;
	top: 50%;
	width: 6px;
	height: 10px;
	border-right: 2px solid var(--bg);
	border-bottom: 2px solid var(--bg);
	transform: translate(-50%, -65%) rotate(45deg);
	opacity: 0;
	transition: opacity var(--dur-s) var(--ease-out);
}

.bg-checkbox input[type="checkbox"]:checked + .bg-checkbox__indicator {
	background-color: var(--text);
	border-color: var(--text);
}

.bg-checkbox input[type="checkbox"]:checked + .bg-checkbox__indicator::after {
	opacity: 1;
}

.bg-checkbox input[type="checkbox"]:focus-visible + .bg-checkbox__indicator {
	outline: 2px solid var(--text);
	outline-offset: 2px;
}

.bg-checkbox__label {
	flex: 1;
	min-width: 0;
}

/* =========================================================
   OVERRIDE PAPER — campi dentro .bg-card--light
   Legge i token scope-locali --p-* esposti dalla card light.
   ========================================================= */

.bg-card--light .bg-field__label {
	color: var(--p-text-2);
}

.bg-card--light .bg-field__helper {
	color: var(--p-text-3);
}

.bg-card--light .bg-input,
.bg-card--light .bg-textarea {
	color: var(--p-text);
	border-color: var(--p-border);
	background-color: transparent;
}

.bg-card--light .bg-input::placeholder,
.bg-card--light .bg-textarea::placeholder {
	color: var(--p-text-3);
}

.bg-card--light .bg-input:hover,
.bg-card--light .bg-textarea:hover {
	border-color: var(--p-border-hover);
}

.bg-card--light .bg-input:focus-visible,
.bg-card--light .bg-textarea:focus-visible {
	border-color: var(--p-text);
	box-shadow: inset 0 0 0 1px var(--p-text);
}

/* Autofill su paper — maschera con --paper invece di --bg */
.bg-card--light .bg-input:-webkit-autofill,
.bg-card--light .bg-input:-webkit-autofill:hover,
.bg-card--light .bg-input:-webkit-autofill:focus,
.bg-card--light .bg-textarea:-webkit-autofill,
.bg-card--light .bg-textarea:-webkit-autofill:hover,
.bg-card--light .bg-textarea:-webkit-autofill:focus {
	-webkit-box-shadow: 0 0 0 100px var(--paper) inset;
	-webkit-text-fill-color: var(--p-text);
	caret-color: var(--p-text);
}

/* Checkbox paper */
.bg-card--light .bg-checkbox {
	color: var(--p-text);
}

.bg-card--light .bg-checkbox__indicator {
	border-color: var(--p-border-hover);
}

.bg-card--light .bg-checkbox__indicator::after {
	border-right-color: var(--paper);
	border-bottom-color: var(--paper);
}

.bg-card--light .bg-checkbox input[type="checkbox"]:checked + .bg-checkbox__indicator {
	background-color: var(--p-text);
	border-color: var(--p-text);
}

.bg-card--light .bg-checkbox input[type="checkbox"]:focus-visible + .bg-checkbox__indicator {
	outline-color: var(--p-text);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
	.bg-input,
	.bg-textarea,
	.bg-checkbox__indicator,
	.bg-checkbox__indicator::after {
		transition: none;
	}
}