/*
 * SILMAR - Floating Language Switcher
 * Foglio di stile del selettore lingua fisso a lato schermo.
 *
 * Autore: Mario Velucchi - Consulente IT - P.IVA IT01977140506
 * Sviluppato con l'assistenza di Claude (Anthropic).
 * Licenza: GPL-2.0-or-later
 *
 * NOTE DI ARCHITETTURA
 * - Tutti i selettori sono ancorati all'ID #silmar-lang-switcher: la
 *   specificita' (1,x,x) e' sufficiente a prevalere sulle regole del tema
 *   tagDiv senza ricorrere a !important.
 * - Colori, dimensioni e z-index arrivano come variabili CSS iniettate da
 *   PHP (wp_add_inline_style), quindi questo file resta statico e cacheabile.
 * - position:fixed aggancia l'elemento al viewport: resta visibile durante lo
 *   scroll su qualsiasi pagina.  Rif. https://developer.mozilla.org/en-US/docs/Web/CSS/position
 */

/* -------------------------------------------------------------------------
 * Contenitore
 * ---------------------------------------------------------------------- */
#silmar-lang-switcher {
	position: fixed;
	top: var(--silmar-ls-top, 50%);
	transform: translateY(-50%);
	z-index: var(--silmar-ls-z, 9000);
	font-family: inherit; /* eredita la tipografia del tema per coerenza visiva */
	line-height: 1;
	box-shadow: 0 2px 18px rgba(0, 0, 0, .22);
	border-radius: var(--silmar-ls-radius, 6px);
}

#silmar-lang-switcher.silmar-ls--left {
	left: 0;
}

#silmar-lang-switcher.silmar-ls--right {
	right: 0;
}

/*
 * Gli angoli arrotondati sono applicati al primo e all'ultimo pulsante, non al
 * contenitore: usare overflow:hidden avrebbe tagliato il tooltip laterale.
 */
#silmar-lang-switcher.silmar-ls--left .silmar-ls__item:first-child .silmar-ls__link {
	border-top-right-radius: var(--silmar-ls-radius, 6px);
}

#silmar-lang-switcher.silmar-ls--left .silmar-ls__item:last-child .silmar-ls__link {
	border-bottom-right-radius: var(--silmar-ls-radius, 6px);
}

#silmar-lang-switcher.silmar-ls--right .silmar-ls__item:first-child .silmar-ls__link {
	border-top-left-radius: var(--silmar-ls-radius, 6px);
}

#silmar-lang-switcher.silmar-ls--right .silmar-ls__item:last-child .silmar-ls__link {
	border-bottom-left-radius: var(--silmar-ls-radius, 6px);
}

#silmar-lang-switcher .silmar-ls__list {
	margin: 0;
	padding: 0;
	list-style: none;
	display: flex;
	flex-direction: column;
}

#silmar-lang-switcher .silmar-ls__item {
	margin: 0;
	padding: 0;
	list-style: none;
}

#silmar-lang-switcher .silmar-ls__item + .silmar-ls__item .silmar-ls__link {
	border-top: 1px solid rgba(255, 255, 255, .16);
}

/* -------------------------------------------------------------------------
 * Pulsante lingua
 * Area cliccabile >= 24x24 px come da WCAG 2.2 SC 2.5.8 (qui 64x64 di default).
 * ---------------------------------------------------------------------- */
#silmar-lang-switcher .silmar-ls__link,
#silmar-lang-switcher .silmar-ls__link:visited {
	position: relative;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 4px;
	box-sizing: border-box;
	width: var(--silmar-ls-size, 64px);
	min-height: var(--silmar-ls-size, 64px);
	padding: 6px;
	background: var(--silmar-ls-bg, #0f2b46);
	color: var(--silmar-ls-fg, #fff);
	text-decoration: none;
	text-align: center;
	transition: background-color .2s ease, color .2s ease;
}

#silmar-lang-switcher .silmar-ls__code {
	display: block;
	font-size: var(--silmar-ls-font-size, 20px);
	font-weight: 700;
	letter-spacing: .06em;
}

#silmar-lang-switcher .silmar-ls__name {
	display: block;
	font-size: 11px;
	font-weight: 400;
	opacity: .8;
}

#silmar-lang-switcher .silmar-ls__flag {
	display: block;
	width: 24px;
	height: auto;
	border: 0;
	border-radius: 2px;
}

/* Stati: hover, focus da tastiera e lingua attiva condividono la tinta d'accento. */
#silmar-lang-switcher .silmar-ls__link:hover,
#silmar-lang-switcher .silmar-ls__link:focus,
#silmar-lang-switcher .silmar-ls__link.is-current {
	background: var(--silmar-ls-accent, #c8a15a);
	color: var(--silmar-ls-accent-fg, #0f2b46);
}

/* Focus visibile da tastiera - WCAG 2.2 SC 2.4.7. */
#silmar-lang-switcher .silmar-ls__link:focus-visible {
	outline: 3px solid var(--silmar-ls-fg, #fff);
	outline-offset: -3px;
}

/* La lingua gia' attiva non e' un'azione: resta segnalata ma non "invitante". */
#silmar-lang-switcher .silmar-ls__link.is-current {
	cursor: default;
}

/* Pagina senza traduzione: il link porta alla home di quella lingua. */
#silmar-lang-switcher .silmar-ls__link.has-no-translation .silmar-ls__code {
	opacity: .75;
}

/* -------------------------------------------------------------------------
 * Etichetta estesa su hover/focus (tooltip laterale)
 * ---------------------------------------------------------------------- */
#silmar-lang-switcher .silmar-ls__name--hover {
	position: absolute;
	top: 50%;
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
	white-space: nowrap;
	padding: 8px 12px;
	font-size: 13px;
	background: var(--silmar-ls-bg, #0f2b46);
	color: var(--silmar-ls-fg, #fff);
	box-shadow: 0 2px 12px rgba(0, 0, 0, .2);
	transition: opacity .18s ease, transform .18s ease;
}

#silmar-lang-switcher.silmar-ls--left .silmar-ls__name--hover {
	left: 100%;
	transform: translate(-8px, -50%);
	border-radius: 0 4px 4px 0;
}

#silmar-lang-switcher.silmar-ls--right .silmar-ls__name--hover {
	right: 100%;
	transform: translate(8px, -50%);
	border-radius: 4px 0 0 4px;
}

#silmar-lang-switcher .silmar-ls__link:hover .silmar-ls__name--hover,
#silmar-lang-switcher .silmar-ls__link:focus-visible .silmar-ls__name--hover {
	opacity: 1;
	visibility: visible;
	transform: translate(0, -50%);
}

/* -------------------------------------------------------------------------
 * Mobile
 * Sotto i 768px il lato schermo e' prezioso: la barra passa in basso al
 * centro (lontana dal pulsante "torna su" del tema, che sta in basso a destra).
 * ---------------------------------------------------------------------- */
@media (max-width: 767px) {

	#silmar-lang-switcher.silmar-ls--mobile-bottom {
		top: auto;
		bottom: 0;
		left: 50%;
		right: auto;
		transform: translateX(-50%);
	}

	#silmar-lang-switcher.silmar-ls--mobile-bottom .silmar-ls__list {
		flex-direction: row;
	}

	/* In orizzontale gli angoli tondi vanno solo in alto, alle estremita'. */
	#silmar-lang-switcher.silmar-ls--mobile-bottom .silmar-ls__item:first-child .silmar-ls__link {
		border-radius: var(--silmar-ls-radius, 6px) 0 0 0;
	}

	#silmar-lang-switcher.silmar-ls--mobile-bottom .silmar-ls__item:last-child .silmar-ls__link {
		border-radius: 0 var(--silmar-ls-radius, 6px) 0 0;
	}

	#silmar-lang-switcher.silmar-ls--mobile-bottom .silmar-ls__item + .silmar-ls__item .silmar-ls__link {
		border-top: 0;
		border-left: 1px solid rgba(255, 255, 255, .16);
	}

	#silmar-lang-switcher.silmar-ls--mobile-bottom .silmar-ls__link {
		width: auto;
		min-width: 72px;
		min-height: 48px;
		padding: 10px 16px;
	}

	/* Su touch il tooltip non serve: l'hover non esiste. */
	#silmar-lang-switcher .silmar-ls__name--hover {
		display: none;
	}

	#silmar-lang-switcher.silmar-ls--mobile-hidden {
		display: none;
	}
}

/* -------------------------------------------------------------------------
 * Accessibilita' e stampa
 * ---------------------------------------------------------------------- */

/* Rispetta la preferenza di sistema per il movimento ridotto. */
@media (prefers-reduced-motion: reduce) {

	#silmar-lang-switcher .silmar-ls__link,
	#silmar-lang-switcher .silmar-ls__name--hover {
		transition: none;
	}
}

@media print {

	#silmar-lang-switcher {
		display: none;
	}
}